ftraster.c revision a4e2894e03de65c5e0cd14b11b6fa30b14ed6769
1a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/***************************************************************************/ 2a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* */ 3a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* ftraster.c */ 4a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* */ 5a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* The FreeType glyph rasterizer (body). */ 6a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* */ 7a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* Copyright 1996-2000 by */ 8a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* */ 10a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* This file is part of the FreeType project, and may only be used, */ 11a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* modified, and distributed under the terms of the FreeType project */ 12a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* this file you indicate that you have read the license and */ 14a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* understand and accept it fully. */ 15a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* */ 16a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/***************************************************************************/ 17a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 18a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 19a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 20a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This is a rewrite of the FreeType 1.x scan-line converter */ 21a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 22a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 23a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 24a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 25a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_FLAT_COMPILE 26a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner# include "ftraster.h" 27a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else 28a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner# include <raster/ftraster.h> 29a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 30a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#include <freetype/internal/ftcalc.h> /* for FT_MulDiv() only */ 31a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 32a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 33a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 34a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 35a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* A simple technical note on how the raster works */ 36a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* ----------------------------------------------- */ 37a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 38a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Converting an outline into a bitmap is achieved in several steps: */ 39a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 40a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* 1 - Decomposing the outline into successive `profiles'. Each */ 41a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile is simply an array of scanline intersections on a given */ 42a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* dimension. A profile's main attributes are */ 43a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 44a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* o its scanline position boundaries, i.e. `Ymin' and `Ymax'. */ 45a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 46a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* o an array of intersection coordinates for each scanline */ 47a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* between `Ymin' and `Ymax'. */ 48a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 49a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* o a direction, indicating whether it was built going `up' or */ 50a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* `down', as this is very important for filling rules. */ 51a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 52a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* 2 - Sweeping the target map's scanlines in order to compute segment */ 53a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* `spans' which are then filled. Additionally, this pass */ 54a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* performs drop-out control. */ 55a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 56a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The outline data is parsed during step 1 only. The profiles are */ 57a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* built from the bottom of the render pool, used as a stack. The */ 58a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* following graphics shows the profile list under construction: */ 59a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 60a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* ____________________________________________________________ _ _ */ 61a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | | | | | */ 62a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | profile | coordinates for | profile | coordinates for |--> */ 63a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | 1 | profile 1 | 2 | profile 2 |--> */ 64a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* |_________|___________________|_________|_________________|__ _ _ */ 65a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 66a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* ^ ^ */ 67a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | | */ 68a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* start of render pool top */ 69a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 70a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The top of the profile stack is kept in the `top' variable. */ 71a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 72a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* As you can see, a profile record is pushed on top of the render */ 73a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* pool, which is then followed by its coordinates/intersections. If */ 74a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* a change of direction is detected in the outline, a new profile is */ 75a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* generated until the end of the outline. */ 76a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 77a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Note that when all profiles have been generated, the function */ 78a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Finalize_Profile_Table() is used to record, for each profile, its */ 79a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* bottom-most scanline as well as the scanline above its upmost */ 80a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* boundary. These positions are called `y-turns' because they (sort */ 81a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* of) correspond to local extrema. They are stored in a sorted list */ 82a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* built from the top of the render pool as a downwards stack: */ 83a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 84a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* _ _ _______________________________________ */ 85a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | | */ 86a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <--| sorted list of | */ 87a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <--| extrema scanlines | */ 88a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* _ _ __________________|____________________| */ 89a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 90a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* ^ ^ */ 91a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* | | */ 92a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* maxBuff sizeBuff = end of pool */ 93a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 94a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This list is later used during the sweep phase in order to */ 95a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* optimize performance (see technical note on the sweep below). */ 96a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 97a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Of course, the raster detects whether the two stacks collide and */ 98a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* handles the situation propertly. */ 99a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 100a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 101a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 102a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 103a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 104a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 105a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 106a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** CONFIGURATION MACROS **/ 107a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 108a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 109a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 110a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 111a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* define DEBUG_RASTER if you want to compile a debugging version */ 112a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define xxxDEBUG_RASTER 113a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 114a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The default render pool size in bytes */ 115a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RASTER_RENDER_POOL 8192 116a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 117a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* undefine FT_RASTER_OPTION_ANTI_ALIASING if you do not want to support */ 118a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* 5-levels anti-aliasing */ 119a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_CONFIG_OPTION_5_GRAY_LEVELS 120a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_RASTER_OPTION_ANTI_ALIASING 121a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 122a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 123a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The size of the two-lines intermediate bitmap used */ 124a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* for anti-aliasing, in bytes. */ 125a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RASTER_GRAY_LINES 2048 126a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 127a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 128a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 129a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 130a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 131a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** OTHER MACROS (do not change) **/ 132a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 133a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 134a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 135a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 136a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 137a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 138a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ 139a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ 140a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* messages during execution. */ 141a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 142a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#undef FT_COMPONENT 143a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_COMPONENT trace_raster 144a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 145a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 146a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef _STANDALONE_ 147a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 148a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 149a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This macro is used to indicate that a function parameter is unused. */ 150a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Its purpose is simply to reduce compiler warnings. Note also that */ 151a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* simply defining it as `(void)x' doesn't avoid warnings with certain */ 152a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* ANSI compilers (e.g. LCC). */ 153a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_UNUSED( x ) (x) = (x) 154a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 155a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Disable the tracing mechanism for simplicity -- developers can */ 156a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* activate it easily by redefining these two macros. */ 157a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef FT_ERROR 158a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_ERROR( x ) do ; while ( 0 ) /* nothing */ 159a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 160a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 161a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef FT_TRACE 162a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_TRACE( x ) do ; while ( 0 ) /* nothing */ 163a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 164a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 165a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_None 0 166a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Not_Ini -1 167a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Overflow -2 168a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Neg_Height -3 169a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Invalid -4 170a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Unsupported -5 171a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 172a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 173a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else /* _STANDALONE_ */ 174a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 175a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 176a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#include <freetype/internal/ftobjs.h> 177a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#include <freetype/internal/ftdebug.h> /* for FT_TRACE() and FT_ERROR() */ 178a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 179a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_None FT_Err_Ok 180a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Not_Ini FT_Err_Raster_Uninitialized 181a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Overflow FT_Err_Raster_Overflow 182a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Neg_Height FT_Err_Raster_Negative_Height 183a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Invalid FT_Err_Invalid_Outline 184a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Raster_Err_Unsupported FT_Err_Cannot_Render_Glyph 185a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 186a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 187a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* _STANDALONE_ */ 188a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 189a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 190a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* FMulDiv means `Fast MulDiv'; it is used in case where `b' is */ 191a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* typically a small value and the result of a*b is known to fit into */ 192a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* 32 bits. */ 193a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FMulDiv( a, b, c ) ( (a) * (b) / (c) ) 194a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 195a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* On the other hand, SMulDiv means `Slow MulDiv', and is used typically */ 196a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* for clipping computations. It simply uses the FT_MulDiv() function */ 197a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* defined in `ftcalc.h'. */ 198a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define SMulDiv FT_MulDiv 199a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 200a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The rasterizer is a very general purpose component; please leave */ 201a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* the following redefinitions there (you never know your target */ 202a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* environment). */ 203a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 204a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef TRUE 205a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define TRUE 1 206a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 207a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 208a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef FALSE 209a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FALSE 0 210a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 211a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 212a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef NULL 213a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define NULL (void*)0 214a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 215a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 216a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef SUCCESS 217a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define SUCCESS 0 218a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 219a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 220a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifndef FAILURE 221a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FAILURE 1 222a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 223a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 224a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 225a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define MaxBezier 32 /* The maximum number of stacked Bezier curves. */ 226a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Setting this constant to more than 32 is a */ 227a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* pure waste of space. */ 228a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 229a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define Pixel_Bits 6 /* fractional bits of *input* coordinates */ 230a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 231a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 232a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 233a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 234a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 235a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** SIMPLE TYPE DECLARATIONS **/ 236a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 237a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 238a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 239a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 240a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef int Int; 241a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef unsigned int UInt; 242a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef short Short; 243a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef unsigned short UShort, *PUShort; 244a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef long Long, *PLong; 245a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef unsigned long ULong; 246a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 247a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef unsigned char Byte, *PByte; 248a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef char Bool; 249a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 250a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef struct TPoint_ 251a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 252a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x; 253a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y; 254a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 255a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } TPoint; 256a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 257a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 258a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef enum TFlow_ 259a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 260a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Flow_None = 0, 261a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Flow_Up = 1, 262a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Flow_Down = -1 263a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 264a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } TFlow; 265a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 266a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 267a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* States of each line, arc, and profile */ 268a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef enum TStates_ 269a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 270a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Unknown, 271a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ascending, 272a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Descending, 273a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Flat 274a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 275a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } TStates; 276a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 277a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 278a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef struct TProfile_ TProfile; 279a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef TProfile* PProfile; 280a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 281a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner struct TProfile_ 282a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 283a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 X; /* current coordinate during sweep */ 284a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile link; /* link to next profile - various purpose */ 285a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong offset; /* start of profile's data in render pool */ 286a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int flow; /* Profile orientation: Asc/Descending */ 287a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long height; /* profile's height in scanlines */ 288a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long start; /* profile's starting scanline */ 289a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 290a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort countL; /* number of lines to step before this */ 291a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile becomes drawable */ 292a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 293a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile next; /* next profile in same contour, used */ 294a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* during drop-out control */ 295a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner }; 296a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 297a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef PProfile TProfileList; 298a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef PProfile* PProfileList; 299a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 300a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 301a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Simple record used to implement a stack of bands, required */ 302a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* by the sub-banding mechanism */ 303a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef struct TBand_ 304a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 305a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short y_min; /* band's minimum */ 306a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short y_max; /* band's maximum */ 307a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 308a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } TBand; 309a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 310a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 311a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define AlignProfileSize \ 312a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ( ( sizeof ( TProfile ) + sizeof ( long ) - 1 ) / sizeof ( long ) ) 313a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 314a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 315a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef TT_STATIC_RASTER 316a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 317a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 318a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_ARGS /* void */ 319a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_ARG /* void */ 320a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 321a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_VARS /* void */ 322a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_VAR /* void */ 323a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 324a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_UNUSED_RASTER do ; while ( 0 ) 325a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 326a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 327a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else /* TT_STATIC_RASTER */ 328a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 329a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 330a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_ARGS TRaster_Instance* raster, 331a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_ARG TRaster_Instance* raster 332a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 333a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_VARS raster, 334a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define RAS_VAR raster 335a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 336a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FT_UNUSED_RASTER FT_UNUSED( raster ) 337a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 338a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 339a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* TT_STATIC_RASTER */ 340a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 341a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 342a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef struct TRaster_Instance_ TRaster_Instance; 343a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 344a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 345a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* prototypes used for sweep function dispatch */ 346a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef void Function_Sweep_Init( RAS_ARGS Short* min, 347a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short* max ); 348a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 349a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef void Function_Sweep_Span( RAS_ARGS Short y, 350a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 351a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 352a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 353a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ); 354a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 355a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef void Function_Sweep_Step( RAS_ARG ); 356a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 357a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 358a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* NOTE: These operations are only valid on 2's complement processors */ 359a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 360a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FLOOR( x ) ( (x) & -ras.precision ) 361a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define CEILING( x ) ( ( (x) + ras.precision - 1 ) & -ras.precision ) 362a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define TRUNC( x ) ( (signed long)(x) >> ras.precision_bits ) 363a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define FRAC( x ) ( (x) & ( ras.precision - 1 ) ) 364a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define SCALED( x ) ( ( (x) << ras.scale_shift ) - ras.precision_half ) 365a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 366a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Note that I have moved the location of some fields in the */ 367a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* structure to ensure that the most used variables are used */ 368a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* at the top. Thus, their offset can be coded with less */ 369a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* opcodes, and it results in a smaller executable. */ 370a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 371a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner struct TRaster_Instance_ 372a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 373a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision_bits; /* precision related variables */ 374a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision; 375a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision_half; 376a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long precision_mask; 377a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision_shift; 378a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision_step; 379a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int precision_jitter; 380a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 381a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int scale_shift; /* == precision_shift for bitmaps */ 382a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* == precision_shift+1 for pixmaps */ 383a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 384a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong buff; /* The profiles buffer */ 385a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong sizeBuff; /* Render pool size */ 386a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong maxBuff; /* Profiles buffer size */ 387a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong top; /* Current cursor in buffer */ 388a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 389a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error error; 390a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 391a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int numTurns; /* number of Y-turns in outline */ 392a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 393a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TPoint* arc; /* current Bezier arc pointer */ 394a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 395a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort bWidth; /* target bitmap width */ 396a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte bTarget; /* target bitmap buffer */ 397a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte gTarget; /* target pixmap buffer */ 398a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 399a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long lastX, lastY, minY, maxY; 400a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 401a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort num_Profs; /* current number of profiles */ 402a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 403a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool fresh; /* signals a fresh new profile which */ 404a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* 'start' field must be completed */ 405a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool joint; /* signals that the last arc ended */ 406a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* exactly on a scanline. Allows */ 407a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* removal of doublets */ 408a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile cProfile; /* current profile */ 409a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile fProfile; /* head of linked list of profiles */ 410a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile gProfile; /* contour's first profile in case */ 411a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* of impact */ 412a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 413a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TStates state; /* rendering state */ 414a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 415a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Bitmap target; /* description of target bit/pixmap */ 416a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Outline outline; 417a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 418a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long traceOfs; /* current offset in target bitmap */ 419a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long traceG; /* current offset in target pixmap */ 420a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 421a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short traceIncr; /* sweep's increment in target bitmap */ 422a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 423a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short gray_min_x; /* current min x during gray rendering */ 424a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short gray_max_x; /* current max x during gray rendering */ 425a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 426a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* dispatch variables */ 427a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 428a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Function_Sweep_Init* Proc_Sweep_Init; 429a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Function_Sweep_Span* Proc_Sweep_Span; 430a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Function_Sweep_Span* Proc_Sweep_Drop; 431a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Function_Sweep_Step* Proc_Sweep_Step; 432a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 433a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte dropOutControl; /* current drop_out control method */ 434a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 435a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool second_pass; /* indicates wether a horizontal pass */ 436a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* should be performed to control */ 437a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* drop-out accurately when calling */ 438a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Render_Glyph. Note that there is */ 439a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* no horizontal pass during gray */ 440a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* rendering. */ 441a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 442a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TPoint arcs[2 * MaxBezier + 1]; /* The Bezier stack */ 443a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 444a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TBand band_stack[16]; /* band stack used for sub-banding */ 445a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int band_top; /* band stack top */ 446a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 447a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int count_table[256]; /* Look-up table used to quickly count */ 448a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* set bits in a gray 2x2 cell */ 449a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 450a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void* memory; 451a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 452a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_RASTER_OPTION_ANTI_ALIASING 453a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 454a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte grays[5]; /* Palette of gray levels used for */ 455a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* render. */ 456a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 457a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte gray_lines[RASTER_GRAY_LINES]; 458a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Intermediate table used to render the */ 459a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* graylevels pixmaps. */ 460a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* gray_lines is a buffer holding two */ 461a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* monochrome scanlines */ 462a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 463a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short gray_width; /* width in bytes of one monochrome */ 464a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* intermediate scanline of gray_lines. */ 465a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Each gray pixel takes 2 bits long there */ 466a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 467a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The gray_lines must hold 2 lines, thus with size */ 468a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* in bytes of at least `gray_width*2'. */ 469a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 470a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* FT_RASTER_ANTI_ALIASING */ 471a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 472a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#if 0 473a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte flags; /* current flags table */ 474a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PUShort outs; /* current outlines table */ 475a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector* coords; 476a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 477a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort nPoints; /* number of points in current glyph */ 478a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short nContours; /* number of contours in current glyph */ 479a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 480a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 481a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner }; 482a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 483a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 484a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_CONFIG_OPTION_STATIC_RASTER 485a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 486a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static TRaster_Instance cur_ras; 487a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define ras cur_ras 488a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 489a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else 490a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 491a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define ras (*raster) 492a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 493a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* FT_CONFIG_OPTION_STATIC_RASTER */ 494a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 495a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 496a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 497a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 498a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 499a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** PROFILES COMPUTATION **/ 500a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 501a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 502a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 503a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 504a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 505a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 506a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 507a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 508a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Set_High_Precision */ 509a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 510a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 511a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Sets precision variables according to param flag. */ 512a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 513a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 514a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* High :: Set to True for high precision (typically for ppem < 18), */ 515a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* false otherwise. */ 516a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 517a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 518a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Set_High_Precision( RAS_ARGS Int High ) 519a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 520a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( High ) 521a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 522a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_bits = 10; 523a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_step = 128; 524a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_jitter = 24; 525a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 526a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 527a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 528a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_bits = 6; 529a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_step = 32; 530a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_jitter = 2; 531a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 532a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 533a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_TRACE6(( "Set_High_Precision(%s)\n", High ? "true" : "false" )); 534a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 535a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision = 1L << ras.precision_bits; 536a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_half = ras.precision / 2; 537a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_shift = ras.precision_bits - Pixel_Bits; 538a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.precision_mask = -ras.precision; 539a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 540a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 541a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 542a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 543a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 544a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 545a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* New_Profile */ 546a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 547a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 548a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Creates a new profile in the render pool. */ 549a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 550a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 551a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* aState :: The state/orientation of the new profile. */ 552a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 553a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 554a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success. FAILURE in case of overflow or of incoherent */ 555a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile. */ 556a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 557a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 558a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool New_Profile( RAS_ARGS TStates aState ) 559a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 560a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !ras.fProfile ) 561a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 562a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile = (PProfile)ras.top; 563a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fProfile = ras.cProfile; 564a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top += AlignProfileSize; 565a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 566a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 567a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.top >= ras.maxBuff ) 568a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 569a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Overflow; 570a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 571a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 572a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 573a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( aState ) 574a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 575a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Ascending: 576a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->flow = Flow_Up; 577a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_TRACE6(( "New ascending profile = %lx\n", (long)ras.cProfile )); 578a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 579a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 580a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Descending: 581a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->flow = Flow_Down; 582a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_TRACE6(( "New descending profile = %lx\n", (long)ras.cProfile )); 583a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 584a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 585a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 586a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_ERROR(( "New_Profile: invalid profile direction!\n" )); 587a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Invalid; 588a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 589a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 590a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 591a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->start = 0; 592a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->height = 0; 593a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->offset = ras.top; 594a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->link = (PProfile)0; 595a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->next = (PProfile)0; 596a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 597a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !ras.gProfile ) 598a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gProfile = ras.cProfile; 599a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 600a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.state = aState; 601a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fresh = TRUE; 602a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 603a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 604a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 605a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 606a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 607a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 608a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 609a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 610a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 611a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* End_Profile */ 612a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 613a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 614a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Finalizes the current profile. */ 615a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 616a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 617a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success. FAILURE in case of overflow or incoherency. */ 618a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 619a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 620a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool End_Profile( RAS_ARG ) 621a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 622a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long h; 623a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile oldProfile; 624a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 625a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 626a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner h = ras.top - ras.cProfile->offset; 627a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 628a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( h < 0 ) 629a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 630a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_ERROR(( "End_Profile: negative height encountered!\n" )); 631a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Neg_Height; 632a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 633a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 634a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 635a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( h > 0 ) 636a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 637a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_TRACE6(( "Ending profile %lx, start = %ld, height = %ld\n", 638a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (long)ras.cProfile, ras.cProfile->start, h )); 639a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 640a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner oldProfile = ras.cProfile; 641a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->height = h; 642a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile = (PProfile)ras.top; 643a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 644a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top += AlignProfileSize; 645a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 646a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->height = 0; 647a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->offset = ras.top; 648a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner oldProfile->next = ras.cProfile; 649a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.num_Profs++; 650a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 651a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 652a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.top >= ras.maxBuff ) 653a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 654a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_TRACE1(( "overflow in End_Profile\n" )); 655a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Overflow; 656a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 657a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 658a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 659a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 660a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 661a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 662a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 663a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 664a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 665a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 666a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 667a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 668a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Insert_Y_Turn */ 669a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 670a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 671a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Inserts a salient into the sorted list placed on top of the render */ 672a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* pool. */ 673a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 674a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 675a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* New y scanline position. */ 676a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 677a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 678a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success. FAILURE in case of overflow. */ 679a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 680a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 681a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Insert_Y_Turn( RAS_ARGS Int y ) 682a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 683a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong y_turns; 684a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int y2, n; 685a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 686a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 687a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner n = ras.numTurns - 1; 688a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y_turns = ras.sizeBuff - ras.numTurns; 689a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 690a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* look for first y value that is <= */ 691a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( n >= 0 && y < y_turns[n] ) 692a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner n--; 693a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 694a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* if it is <, simply insert it, ignore if == */ 695a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( n >= 0 && y > y_turns[n] ) 696a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( n >= 0 ) 697a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 698a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = y_turns[n]; 699a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y_turns[n] = y; 700a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y = y2; 701a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner n--; 702a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 703a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 704a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( n < 0 ) 705a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 706a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.maxBuff <= ras.top ) 707a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 708a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Overflow; 709a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 710a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 711a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.maxBuff--; 712a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.numTurns++; 713a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.sizeBuff[-ras.numTurns] = y; 714a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 715a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 716a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 717a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 718a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 719a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 720a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 721a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 722a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 723a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Finalize_Profile_Table */ 724a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 725a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 726a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Adjusts all links in the profiles list. */ 727a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 728a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 729a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success. FAILURE in case of overflow. */ 730a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 731a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 732a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Finalize_Profile_Table( RAS_ARG ) 733a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 734a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int bottom, top; 735a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort n; 736a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile p; 737a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 738a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 739a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner n = ras.num_Profs; 740a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 741a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( n > 1 ) 742a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 743a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p = ras.fProfile; 744a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( n > 0 ) 745a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 746a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( n > 1 ) 747a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p->link = (PProfile)( p->offset + p->height ); 748a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 749a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p->link = NULL; 750a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 751a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( p->flow ) 752a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 753a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Flow_Down: 754a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bottom = p->start - p->height+1; 755a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top = p->start; 756a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p->start = bottom; 757a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p->offset += p->height - 1; 758a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 759a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 760a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Flow_Up: 761a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 762a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bottom = p->start; 763a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top = p->start + p->height - 1; 764a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 765a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 766a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Insert_Y_Turn( RAS_VARS bottom ) || 767a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Insert_Y_Turn( RAS_VARS top + 1 ) ) 768a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 769a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 770a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p = p->link; 771a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner n--; 772a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 773a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 774a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 775a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fProfile = NULL; 776a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 777a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 778a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 779a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 780a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 781a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 782a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 783a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 784a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Split_Conic */ 785a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 786a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 787a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Subdivides one conic Bezier into two joint sub-arcs in the Bezier */ 788a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stack. */ 789a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 790a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 791a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* None (subdivided Bezier is taken from the top of the stack). */ 792a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 793a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Note> */ 794a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This routine is the `beef' of this component. It is _the_ inner */ 795a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* loop that should be optimized to hell to get the best performance. */ 796a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 797a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 798a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Split_Conic( TPoint* base ) 799a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 800a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long a, b; 801a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 802a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 803a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[4].x = base[2].x; 804a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner b = base[1].x; 805a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner a = base[3].x = ( base[2].x + b ) / 2; 806a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner b = base[1].x = ( base[0].x + b ) / 2; 807a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[2].x = ( a + b ) / 2; 808a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 809a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[4].y = base[2].y; 810a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner b = base[1].y; 811a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner a = base[3].y = ( base[2].y + b ) / 2; 812a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner b = base[1].y = ( base[0].y + b ) / 2; 813a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[2].y = ( a + b ) / 2; 814a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 815a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* hand optimized. gcc doesn't seem to be too good at common */ 816a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* expression substitution and instruction scheduling ;-) */ 817a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 818a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 819a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 820a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 821a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 822a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 823a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Split_Cubic */ 824a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 825a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 826a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Subdivides a third-order Bezier arc into two joint sub-arcs in the */ 827a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Bezier stack. */ 828a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 829a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Note> */ 830a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This routine is the `beef' of the component. It is one of _the_ */ 831a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* inner loops that should be optimized like hell to get the best */ 832a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* performance. */ 833a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 834a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 835a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Split_Cubic( TPoint* base ) 836a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 837a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long a, b, c, d; 838a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 839a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 840a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[6].x = base[3].x; 841a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = base[1].x; 842a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner d = base[2].x; 843a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[1].x = a = ( base[0].x + c + 1 ) >> 1; 844a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[5].x = b = ( base[3].x + d + 1 ) >> 1; 845a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = ( c + d + 1 ) >> 1; 846a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[2].x = a = ( a + c + 1 ) >> 1; 847a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[4].x = b = ( b + c + 1 ) >> 1; 848a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[3].x = ( a + b + 1 ) >> 1; 849a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 850a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[6].y = base[3].y; 851a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = base[1].y; 852a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner d = base[2].y; 853a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[1].y = a = ( base[0].y + c + 1 ) >> 1; 854a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[5].y = b = ( base[3].y + d + 1 ) >> 1; 855a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = ( c + d + 1 ) >> 1; 856a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[2].y = a = ( a + c + 1 ) >> 1; 857a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[4].y = b = ( b + c + 1 ) >> 1; 858a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner base[3].y = ( a + b + 1 ) >> 1; 859a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 860a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 861a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 862a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 863a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 864a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 865a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Line_Up */ 866a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 867a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 868a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Computes the x-coordinates of an ascending line segment and stores */ 869a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* them in the render pool. */ 870a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 871a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 872a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x1 :: The x-coordinate of the segment's start point. */ 873a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 874a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y1 :: The y-coordinate of the segment's start point. */ 875a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 876a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x2 :: The x-coordinate of the segment's end point. */ 877a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 878a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y2 :: The y-coordinate of the segment's end point. */ 879a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 880a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* miny :: A lower vertical clipping bound value. */ 881a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 882a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* maxy :: An upper vertical clipping bound value. */ 883a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 884a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 885a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow. */ 886a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 887a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 888a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Line_Up( RAS_ARGS Long x1, 889a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y1, 890a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x2, 891a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y2, 892a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long miny, 893a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long maxy ) 894a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 895a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long Dx, Dy; 896a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int e1, e2, f1, f2, size; /* XXX: is `Short' sufficient? */ 897a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long Ix, Rx, Ax; 898a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 899a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong top; 900a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 901a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 902a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Dx = x2 - x1; 903a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Dy = y2 - y1; 904a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 905a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Dy <= 0 || y2 < miny || y1 > maxy ) 906a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 907a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 908a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y1 < miny ) 909a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 910a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Take care: miny-y1 can be a very large value; we use */ 911a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* a slow MulDiv function to avoid clipping bugs */ 912a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 += SMulDiv( Dx, miny - y1, Dy ); 913a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( miny ); 914a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = 0; 915a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 916a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 917a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 918a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( y1 ); 919a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = FRAC( y1 ); 920a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 921a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 922a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 > maxy ) 923a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 924a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x2 += FMulDiv( Dx, maxy - y2, Dy ); UNNECESSARY */ 925a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = TRUNC( maxy ); 926a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f2 = 0; 927a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 928a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 929a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 930a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = TRUNC( y2 ); 931a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f2 = FRAC( y2 ); 932a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 933a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 934a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( f1 > 0 ) 935a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 936a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 == e2 ) 937a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 938a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 939a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 940a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 += FMulDiv( Dx, ras.precision - f1, Dy ); 941a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 += 1; 942a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 943a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 944a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 945a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.joint ) 946a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 947a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top--; 948a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 949a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 950a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 951a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = ( f2 == 0 ); 952a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 953a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.fresh ) 954a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 955a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->start = e1; 956a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fresh = FALSE; 957a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 958a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 959a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner size = e2 - e1 + 1; 960a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.top + size >= ras.maxBuff ) 961a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 962a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Overflow; 963a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 964a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 965a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 966a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Dx > 0 ) 967a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 968a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ix = ( ras.precision * Dx ) / Dy; 969a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Rx = ( ras.precision * Dx ) % Dy; 970a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Dx = 1; 971a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 972a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 973a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 974a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ix = -( ( ras.precision * -Dx ) / Dy ); 975a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Rx = ( ras.precision * -Dx ) % Dy; 976a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Dx = -1; 977a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 978a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 979a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ax = -Dy; 980a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top = ras.top; 981a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 982a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( size > 0 ) 983a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 984a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *top++ = x1; 985a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 986a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 += Ix; 987a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ax += Rx; 988a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Ax >= 0 ) 989a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 990a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Ax -= Dy; 991a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 += Dx; 992a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 993a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner size--; 994a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 995a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 996a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top = top; 997a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 998a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 999a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1000a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1001a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1002a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1003a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1004a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Line_Down */ 1005a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1006a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1007a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Computes the x-coordinates of an descending line segment and */ 1008a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stores them in the render pool. */ 1009a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1010a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1011a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x1 :: The x-coordinate of the segment's start point. */ 1012a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1013a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y1 :: The y-coordinate of the segment's start point. */ 1014a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1015a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x2 :: The x-coordinate of the segment's end point. */ 1016a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1017a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y2 :: The y-coordinate of the segment's end point. */ 1018a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1019a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* miny :: A lower vertical clipping bound value. */ 1020a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1021a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* maxy :: An upper vertical clipping bound value. */ 1022a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1023a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1024a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow. */ 1025a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1026a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1027a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Line_Down( RAS_ARGS Long x1, 1028a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y1, 1029a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x2, 1030a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y2, 1031a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long miny, 1032a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long maxy ) 1033a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1034a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool result, fresh; 1035a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1036a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1037a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner fresh = ras.fresh; 1038a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1039a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner result = Line_Up( RAS_VARS x1, -y1, x2, -y2, -maxy, -miny ); 1040a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1041a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( fresh && !ras.fresh ) 1042a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->start = -ras.cProfile->start; 1043a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1044a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return result; 1045a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1046a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1047a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1048a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* A function type describing the functions used to split Bezier arcs */ 1049a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner typedef void (*TSplitter)( TPoint* base ); 1050a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1051a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1052a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1053a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1054a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1055a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Bezier_Up */ 1056a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1057a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1058a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Computes the x-coordinates of an ascending Bezier arc and stores */ 1059a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* them in the render pool. */ 1060a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1061a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1062a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* degree :: The degree of the Bezier arc (either 2 or 3). */ 1063a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1064a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* splitter :: The function to split Bezier arcs. */ 1065a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1066a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* miny :: A lower vertical clipping bound value. */ 1067a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1068a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* maxy :: An upper vertical clipping bound value. */ 1069a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1070a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1071a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow. */ 1072a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1073a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1074a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Bezier_Up( RAS_ARGS Int degree, 1075a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TSplitter splitter, 1076a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long miny, 1077a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long maxy ) 1078a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1079a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y1, y2, e, e2, e0; 1080a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short f1; 1081a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1082a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TPoint* arc; 1083a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TPoint* start_arc; 1084a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1085a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PLong top; 1086a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1087a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1088a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc = ras.arc; 1089a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y1 = arc[degree].y; 1090a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = arc[0].y; 1091a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top = ras.top; 1092a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1093a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 < miny || y1 > maxy ) 1094a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fin; 1095a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1096a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = FLOOR( y2 ); 1097a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1098a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e2 > maxy ) 1099a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = maxy; 1100a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1101a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e0 = miny; 1102a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1103a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y1 < miny ) 1104a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e = miny; 1105a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1106a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1107a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e = CEILING( y1 ); 1108a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = FRAC( y1 ); 1109a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e0 = e; 1110a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1111a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( f1 == 0 ) 1112a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1113a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.joint ) 1114a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1115a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top--; 1116a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 1117a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1118a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1119a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *top++ = arc[degree].x; 1120a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1121a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e += ras.precision; 1122a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1123a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1124a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1125a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.fresh ) 1126a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1127a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->start = TRUNC( e0 ); 1128a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fresh = FALSE; 1129a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1130a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1131a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e2 < e ) 1132a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fin; 1133a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1134a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ( top + TRUNC( e2 - e ) + 1 ) >= ras.maxBuff ) 1135a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1136a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top = top; 1137a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Overflow; 1138a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1139a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1140a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1141a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner start_arc = arc; 1142a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1143a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( arc >= start_arc && e <= e2 ) 1144a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1145a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 1146a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1147a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = arc[0].y; 1148a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1149a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 > e ) 1150a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1151a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y1 = arc[degree].y; 1152a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 - y1 >= ras.precision_step ) 1153a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1154a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner splitter( arc ); 1155a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc += degree; 1156a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1157a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1158a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1159a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *top++ = arc[degree].x + FMulDiv( arc[0].x-arc[degree].x, 1160a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e - y1, y2 - y1 ); 1161a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc -= degree; 1162a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e += ras.precision; 1163a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1164a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1165a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1166a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1167a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 == e ) 1168a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1169a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = TRUE; 1170a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *top++ = arc[0].x; 1171a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1172a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e += ras.precision; 1173a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1174a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc -= degree; 1175a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1176a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1177a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1178a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Fin: 1179a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top = top; 1180a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc -= degree; 1181a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 1182a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1183a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1184a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1185a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1186a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1187a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1188a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Bezier_Down */ 1189a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1190a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1191a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Computes the x-coordinates of an descending Bezier arc and stores */ 1192a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* them in the render pool. */ 1193a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1194a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1195a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* degree :: The degree of the Bezier arc (either 2 or 3). */ 1196a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1197a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* splitter :: The function to split Bezier arcs. */ 1198a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1199a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* miny :: A lower vertical clipping bound value. */ 1200a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1201a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* maxy :: An upper vertical clipping bound value. */ 1202a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1203a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1204a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow. */ 1205a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1206a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1207a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Bezier_Down( RAS_ARGS Int degree, 1208a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TSplitter splitter, 1209a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long miny, 1210a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long maxy ) 1211a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1212a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TPoint* arc = ras.arc; 1213a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool result, fresh; 1214a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1215a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1216a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc[0].y = -arc[0].y; 1217a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc[1].y = -arc[1].y; 1218a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc[2].y = -arc[2].y; 1219a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( degree > 2 ) 1220a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc[3].y = -arc[3].y; 1221a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1222a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner fresh = ras.fresh; 1223a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1224a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner result = Bezier_Up( RAS_VARS degree, splitter, -maxy, -miny ); 1225a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1226a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( fresh && !ras.fresh ) 1227a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->start = -ras.cProfile->start; 1228a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1229a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner arc[0].y = -arc[0].y; 1230a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return result; 1231a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1232a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1233a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1234a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1235a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1236a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1237a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Line_To */ 1238a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1239a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1240a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Injects a new line segment and adjusts Profiles list. */ 1241a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1242a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1243a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x :: The x-coordinate of the segment's end point (its start point */ 1244a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* is stored in `LastX'). */ 1245a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1246a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y :: The y-coordinate of the segment's end point (its start point */ 1247a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* is stored in `LastY'). */ 1248a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1249a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1250a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow or incorrect */ 1251a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile. */ 1252a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1253a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1254a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Line_To( RAS_ARGS Long x, 1255a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y ) 1256a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1257a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* First, detect a change of direction */ 1258a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1259a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( ras.state ) 1260a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1261a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Unknown: 1262a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y > ras.lastY ) 1263a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1264a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( New_Profile( RAS_VARS Ascending ) ) 1265a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1266a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1267a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1268a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1269a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y < ras.lastY ) 1270a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( New_Profile( RAS_VARS Descending ) ) 1271a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1272a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1273a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1274a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1275a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Ascending: 1276a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y < ras.lastY ) 1277a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1278a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( End_Profile( RAS_VAR ) || 1279a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner New_Profile( RAS_VARS Descending ) ) 1280a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1281a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1282a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1283a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1284a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Descending: 1285a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y > ras.lastY ) 1286a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1287a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( End_Profile( RAS_VAR ) || 1288a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner New_Profile( RAS_VARS Ascending ) ) 1289a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1290a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1291a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1292a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1293a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 1294a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ; 1295a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1296a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1297a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Then compute the lines */ 1298a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1299a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( ras.state ) 1300a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1301a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Ascending: 1302a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Line_Up( RAS_VARS ras.lastX, ras.lastY, 1303a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x, y, ras.minY, ras.maxY ) ) 1304a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1305a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1306a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1307a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Descending: 1308a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Line_Down( RAS_VARS ras.lastX, ras.lastY, 1309a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x, y, ras.minY, ras.maxY ) ) 1310a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1311a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1312a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1313a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 1314a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ; 1315a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1316a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1317a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastX = x; 1318a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY = y; 1319a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1320a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 1321a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1322a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1323a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1324a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1325a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1326a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1327a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Conic_To */ 1328a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1329a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1330a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Injects a new conic arc and adjusts the profile list. */ 1331a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1332a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1333a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cx :: The x-coordinate of the arc's new control point. */ 1334a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1335a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cy :: The y-coordinate of the arc's new control point. */ 1336a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1337a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x :: The x-coordinate of the arc's end point (its start point is */ 1338a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stored in `LastX'). */ 1339a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1340a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y :: The y-coordinate of the arc's end point (its start point is */ 1341a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stored in `LastY'). */ 1342a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1343a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1344a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow or incorrect */ 1345a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile. */ 1346a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1347a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1348a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Conic_To( RAS_ARGS Long cx, 1349a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long cy, 1350a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x, 1351a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y ) 1352a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1353a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y1, y2, y3, x3, ymin, ymax; 1354a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TStates state_bez; 1355a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1356a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1357a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc = ras.arcs; 1358a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[2].x = ras.lastX; 1359a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[2].y = ras.lastY; 1360a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[1].x = cx; ras.arc[1].y = cy; 1361a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[0].x = x; ras.arc[0].y = y; 1362a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1363a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner do 1364a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1365a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y1 = ras.arc[2].y; 1366a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = ras.arc[1].y; 1367a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y3 = ras.arc[0].y; 1368a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x3 = ras.arc[0].x; 1369a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1370a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* first, categorize the Bezier arc */ 1371a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1372a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y1 <= y3 ) 1373a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1374a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin = y1; 1375a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax = y3; 1376a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1377a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1378a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1379a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin = y3; 1380a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax = y1; 1381a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1382a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1383a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 < ymin || y2 > ymax ) 1384a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1385a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* this arc has no given direction, split it! */ 1386a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Split_Conic( ras.arc ); 1387a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc += 2; 1388a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1389a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else if ( y1 == y3 ) 1390a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1391a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* this arc is flat, ignore it and pop it from the Bezier stack */ 1392a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc -= 2; 1393a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1394a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1395a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1396a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* the arc is y-monotonous, either ascending or descending */ 1397a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* detect a change of direction */ 1398a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner state_bez = y1 < y3 ? Ascending : Descending; 1399a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.state != state_bez ) 1400a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1401a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* finalize current profile if any */ 1402a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.state != Unknown && 1403a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner End_Profile( RAS_VAR ) ) 1404a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1405a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1406a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* create a new profile */ 1407a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( New_Profile( RAS_VARS state_bez ) ) 1408a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1409a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1410a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1411a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* now call the appropriate routine */ 1412a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( state_bez == Ascending ) 1413a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1414a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Bezier_Up( RAS_VARS 2, Split_Conic, ras.minY, ras.maxY ) ) 1415a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1416a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1417a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1418a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Bezier_Down( RAS_VARS 2, Split_Conic, ras.minY, ras.maxY ) ) 1419a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1420a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1421a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1422a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } while ( ras.arc >= ras.arcs ); 1423a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1424a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastX = x3; 1425a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY = y3; 1426a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1427a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 1428a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1429a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Fail: 1430a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1431a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1432a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1433a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1434a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1435a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1436a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1437a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Cubic_To */ 1438a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1439a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1440a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Injects a new cubic arc and adjusts the profile list. */ 1441a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1442a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1443a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cx1 :: The x-coordinate of the arc's first new control point. */ 1444a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1445a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cy1 :: The y-coordinate of the arc's first new control point. */ 1446a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1447a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cx2 :: The x-coordinate of the arc's second new control point. */ 1448a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1449a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* cy2 :: The y-coordinate of the arc's second new control point. */ 1450a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1451a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* x :: The x-coordinate of the arc's end point (its start point is */ 1452a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stored in `LastX'). */ 1453a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1454a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* y :: The y-coordinate of the arc's end point (its start point is */ 1455a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* stored in `LastY'). */ 1456a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1457a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1458a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on render pool overflow or incorrect */ 1459a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profile. */ 1460a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1461a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1462a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Cubic_To( RAS_ARGS Long cx1, 1463a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long cy1, 1464a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long cx2, 1465a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long cy2, 1466a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x, 1467a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y ) 1468a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1469a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long y1, y2, y3, y4, x4, ymin1, ymax1, ymin2, ymax2; 1470a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TStates state_bez; 1471a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1472a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1473a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc = ras.arcs; 1474a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[3].x = ras.lastX; 1475a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[3].y = ras.lastY; 1476a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[2].x = cx1; ras.arc[2].y = cy1; 1477a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[1].x = cx2; ras.arc[1].y = cy2; 1478a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc[0].x = x; ras.arc[0].y = y; 1479a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1480a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner do 1481a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1482a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y1 = ras.arc[3].y; 1483a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = ras.arc[2].y; 1484a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y3 = ras.arc[1].y; 1485a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y4 = ras.arc[0].y; 1486a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x4 = ras.arc[0].x; 1487a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1488a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* first, categorize the Bezier arc */ 1489a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1490a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y1 <= y4 ) 1491a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1492a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin1 = y1; 1493a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax1 = y4; 1494a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1495a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1496a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1497a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin1 = y4; 1498a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax1 = y1; 1499a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1500a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1501a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y2 <= y3 ) 1502a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1503a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin2 = y2; 1504a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax2 = y3; 1505a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1506a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1507a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1508a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymin2 = y3; 1509a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ymax2 = y2; 1510a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1511a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1512a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ymin2 < ymin1 || ymax2 > ymax1 ) 1513a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1514a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* this arc has no given direction, split it! */ 1515a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Split_Cubic( ras.arc ); 1516a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc += 3; 1517a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1518a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else if ( y1 == y4 ) 1519a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1520a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* this arc is flat, ignore it and pop it from the Bezier stack */ 1521a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.arc -= 3; 1522a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1523a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1524a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1525a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner state_bez = ( y1 <= y4 ) ? Ascending : Descending; 1526a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1527a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* detect a change of direction */ 1528a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.state != state_bez ) 1529a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1530a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.state != Unknown && 1531a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner End_Profile( RAS_VAR ) ) 1532a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1533a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1534a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( New_Profile( RAS_VARS state_bez ) ) 1535a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1536a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1537a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1538a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* compute intersections */ 1539a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( state_bez == Ascending ) 1540a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1541a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Bezier_Up( RAS_VARS 3, Split_Cubic, ras.minY, ras.maxY ) ) 1542a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1543a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1544a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1545a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Bezier_Down( RAS_VARS 3, Split_Cubic, ras.minY, ras.maxY ) ) 1546a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1547a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1548a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1549a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } while ( ras.arc >= ras.arcs ); 1550a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1551a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastX = x4; 1552a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY = y4; 1553a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1554a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 1555a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1556a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Fail: 1557a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1558a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1559a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1560a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1561a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#undef SWAP_ 1562a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#define SWAP_( x, y ) do \ 1563a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { \ 1564a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long swap = x; \ 1565a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner \ 1566a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner \ 1567a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x = y; \ 1568a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y = swap; \ 1569a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } while ( 0 ) 1570a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1571a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1572a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1573a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1574a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1575a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Decompose_Curve */ 1576a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1577a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1578a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Scans the outline arays in order to emit individual segments and */ 1579a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Beziers by calling Line_To() and Bezier_To(). It handles all */ 1580a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* weird cases, like when the first point is off the curve, or when */ 1581a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* there are simply no `on' points in the contour! */ 1582a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1583a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1584a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* first :: The index of the first point in the contour. */ 1585a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1586a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* last :: The index of the last point in the contour. */ 1587a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1588a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* flipped :: If set, flip the direction of the curve. */ 1589a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1590a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1591a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE on error. */ 1592a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1593a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1594a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Decompose_Curve( RAS_ARGS UShort first, 1595a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort last, 1596a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner int flipped ) 1597a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1598a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector v_last; 1599a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector v_control; 1600a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector v_start; 1601a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1602a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector* points; 1603a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector* point; 1604a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector* limit; 1605a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner char* tags; 1606a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1607a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner char tag; /* current point's state */ 1608a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1609a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1610a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner points = ras.outline.points; 1611a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner limit = points + last; 1612a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1613a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start.x = SCALED( points[first].x ); 1614a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start.y = SCALED( points[first].y ); 1615a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_last.x = SCALED( points[last].x ); 1616a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_last.y = SCALED( points[last].y ); 1617a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1618a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( flipped ) 1619a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1620a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( v_start.x, v_start.y ); 1621a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( v_last.x, v_last.y ); 1622a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1623a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1624a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_control = v_start; 1625a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1626a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner point = points + first; 1627a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tags = ras.outline.tags + first; 1628a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tag = FT_CURVE_TAG( tags[0] ); 1629a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1630a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* A contour cannot start with a cubic control point! */ 1631a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( tag == FT_Curve_Tag_Cubic ) 1632a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Invalid_Outline; 1633a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1634a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* check first point to determine origin */ 1635a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( tag == FT_Curve_Tag_Conic ) 1636a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1637a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* first point is conic control. Yes, this happens. */ 1638a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( FT_CURVE_TAG( ras.outline.tags[last] ) == FT_Curve_Tag_On ) 1639a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1640a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* start at last point if it is on the curve */ 1641a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start = v_last; 1642a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner limit--; 1643a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1644a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 1645a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1646a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* if both first and last points are conic, */ 1647a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* start at their middle and record its position */ 1648a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* for closure */ 1649a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start.x = ( v_start.x + v_last.x ) / 2; 1650a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start.y = ( v_start.y + v_last.y ) / 2; 1651a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1652a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_last = v_start; 1653a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1654a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner point--; 1655a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tags--; 1656a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1657a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1658a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastX = v_start.x; 1659a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY = v_start.y; 1660a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1661a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( point < limit ) 1662a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1663a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner point++; 1664a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tags++; 1665a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1666a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tag = FT_CURVE_TAG( tags[0] ); 1667a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1668a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( tag ) 1669a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1670a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case FT_Curve_Tag_On: /* emit a single line_to */ 1671a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1672a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x, y; 1673a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1674a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1675a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x = SCALED( point->x ); 1676a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y = SCALED( point->y ); 1677a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( flipped ) 1678a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( x, y ); 1679a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1680a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Line_To( RAS_VARS x, y ) ) 1681a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1682a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner continue; 1683a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1684a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1685a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case FT_Curve_Tag_Conic: /* consume conic arcs */ 1686a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_control.x = SCALED( point[0].x ); 1687a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_control.y = SCALED( point[0].y ); 1688a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1689a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( flipped ) 1690a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( v_control.x, v_control.y ); 1691a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1692a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Do_Conic: 1693a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( point < limit ) 1694a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1695a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Vector v_middle; 1696a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x, y; 1697a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1698a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1699a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner point++; 1700a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tags++; 1701a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tag = FT_CURVE_TAG( tags[0] ); 1702a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1703a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x = SCALED( point[0].x ); 1704a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y = SCALED( point[0].y ); 1705a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1706a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( flipped ) 1707a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( x, y ); 1708a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1709a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( tag == FT_Curve_Tag_On ) 1710a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1711a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Conic_To( RAS_VARS v_control.x, v_control.y, x, y ) ) 1712a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1713a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner continue; 1714a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1715a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1716a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( tag != FT_Curve_Tag_Conic ) 1717a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Invalid_Outline; 1718a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1719a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_middle.x = ( v_control.x + x ) / 2; 1720a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_middle.y = ( v_control.y + y ) / 2; 1721a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1722a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Conic_To( RAS_VARS v_control.x, v_control.y, 1723a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_middle.x, v_middle.y ) ) 1724a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1725a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1726a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_control.x = x; 1727a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_control.y = y; 1728a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1729a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Do_Conic; 1730a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1731a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1732a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Conic_To( RAS_VARS v_control.x, v_control.y, 1733a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner v_start.x, v_start.y ) ) 1734a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1735a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1736a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Close; 1737a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1738a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: /* FT_Curve_Tag_Cubic */ 1739a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1740a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x1, y1, x2, y2, x3, y3; 1741a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1742a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1743a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( point + 1 > limit || 1744a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_CURVE_TAG( tags[1] ) != FT_Curve_Tag_Cubic ) 1745a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Invalid_Outline; 1746a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1747a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner point += 2; 1748a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner tags += 2; 1749a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1750a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 = SCALED( point[-2].x ); 1751a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y1 = SCALED( point[-2].y ); 1752a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x2 = SCALED( point[-1].x ); 1753a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y2 = SCALED( point[-1].y ); 1754a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x3 = SCALED( point[ 0].x ); 1755a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y3 = SCALED( point[ 0].y ); 1756a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1757a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( flipped ) 1758a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1759a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( x1, y1 ); 1760a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( x2, y2 ); 1761a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner SWAP_( x3, y3 ); 1762a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1763a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1764a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( point <= limit ) 1765a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1766a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Cubic_To( RAS_VARS x1, y1, x2, y2, x3, y3 ) ) 1767a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1768a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner continue; 1769a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1770a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1771a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Cubic_To( RAS_VARS x1, y1, x2, y2, v_start.x, v_start.y ) ) 1772a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1773a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Close; 1774a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1775a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1776a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1777a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1778a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* close the contour with a line segment */ 1779a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Line_To( RAS_VARS v_start.x, v_start.y ) ) 1780a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Fail; 1781a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1782a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Close: 1783a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 1784a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1785a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Invalid_Outline: 1786a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Invalid; 1787a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1788a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Fail: 1789a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1790a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1791a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1792a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1793a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1794a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1795a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 1796a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Convert_Glyph */ 1797a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1798a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 1799a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Converts a glyph into a series of segments and arcs and makes a */ 1800a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* profiles list with them. */ 1801a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1802a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 1803a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* flipped :: If set, flip the direction of curve. */ 1804a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1805a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 1806a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* SUCCESS on success, FAILURE if any error was encountered during */ 1807a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* rendering. */ 1808a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1809a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1810a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Convert_Glyph( RAS_ARGS int flipped ) 1811a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1812a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short i; 1813a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner UShort start; 1814a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1815a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile lastProfile; 1816a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1817a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1818a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fProfile = NULL; 1819a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.joint = FALSE; 1820a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.fresh = FALSE; 1821a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1822a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.maxBuff = ras.sizeBuff - AlignProfileSize; 1823a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1824a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.numTurns = 0; 1825a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1826a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile = (PProfile)ras.top; 1827a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.cProfile->offset = ras.top; 1828a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.num_Profs = 0; 1829a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1830a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner start = 0; 1831a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1832a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner for ( i = 0; i < ras.outline.n_contours; i++ ) 1833a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1834a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.state = Unknown; 1835a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gProfile = NULL; 1836a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1837a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Decompose_Curve( RAS_VARS start, ras.outline.contours[i], flipped ) ) 1838a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1839a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1840a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner start = ras.outline.contours[i] + 1; 1841a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1842a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* We must now see whether the extreme arcs join or not */ 1843a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( FRAC( ras.lastY ) == 0 && 1844a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY >= ras.minY && 1845a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.lastY <= ras.maxY ) 1846a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gProfile && ras.gProfile->flow == ras.cProfile->flow ) 1847a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top--; 1848a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Note that ras.gProfile can be nil if the contour was too small */ 1849a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* to be drawn. */ 1850a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1851a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner lastProfile = ras.cProfile; 1852a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( End_Profile( RAS_VAR ) ) 1853a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1854a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1855a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* close the `next profile in contour' linked list */ 1856a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gProfile ) 1857a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner lastProfile->next = ras.gProfile; 1858a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1859a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1860a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Finalize_Profile_Table( RAS_VAR ) ) 1861a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 1862a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1863a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return ( ras.top < ras.maxBuff ? SUCCESS : FAILURE ); 1864a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1865a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1866a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1867a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1868a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1869a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 1870a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** SCAN-LINE SWEEPS AND DRAWING **/ 1871a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /** **/ 1872a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1873a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1874a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1875a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1876a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1877a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1878a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Init_Linked */ 1879a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1880a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Initializes an empty linked list. */ 1881a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1882a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1883a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Init_Linked( TProfileList* l ) 1884a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1885a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *l = NULL; 1886a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1887a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1888a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1889a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1890a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1891a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* InsNew */ 1892a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1893a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Inserts a new profile in a linked list. */ 1894a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1895a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1896a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void InsNew( PProfileList list, 1897a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile profile ) 1898a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1899a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile *old, current; 1900a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x; 1901a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1902a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1903a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = list; 1904a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 1905a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x = profile->X; 1906a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1907a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( current ) 1908a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1909a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x < current->X ) 1910a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 1911a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = ¤t->link; 1912a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 1913a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1914a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1915a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner profile->link = current; 1916a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *old = profile; 1917a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1918a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1919a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1920a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1921a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1922a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* DelOld */ 1923a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1924a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Removes an old profile from a linked list. */ 1925a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1926a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1927a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void DelOld( PProfileList list, 1928a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile profile ) 1929a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1930a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile *old, current; 1931a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1932a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1933a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = list; 1934a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 1935a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1936a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( current ) 1937a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1938a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( current == profile ) 1939a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1940a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *old = current->link; 1941a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 1942a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1943a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1944a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = ¤t->link; 1945a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 1946a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1947a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1948a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* we should never get there, unless the profile was not part of */ 1949a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* the list. */ 1950a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1951a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1952a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1953a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1954a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1955a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Update */ 1956a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1957a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Update all X offsets of a drawing list. */ 1958a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1959a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1960a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Update( PProfile first ) 1961a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1962a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile current = first; 1963a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1964a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1965a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( current ) 1966a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1967a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current->X = *current->offset; 1968a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current->offset += current->flow; 1969a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current->height--; 1970a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = current->link; 1971a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1972a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 1973a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1974a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1975a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 1976a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1977a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Sort */ 1978a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1979a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Sorts a trace list. In 95%, the list is already sorted. We need */ 1980a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* an algorithm which is fast in this case. Bubble sort is enough */ 1981a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* and simple. */ 1982a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 1983a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 1984a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Sort( PProfileList list ) 1985a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 1986a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile *old, current, next; 1987a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1988a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1989a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* First, set the new X coordinate of each profile */ 1990a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Update( *list ); 1991a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1992a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Then sort them */ 1993a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = list; 1994a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 1995a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1996a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !current ) 1997a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 1998a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 1999a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner next = current->link; 2000a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2001a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( next ) 2002a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2003a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( current->X <= next->X ) 2004a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2005a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = ¤t->link; 2006a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 2007a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2008a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !current ) 2009a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2010a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2011a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2012a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2013a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *old = next; 2014a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current->link = next->link; 2015a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner next->link = current; 2016a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2017a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner old = list; 2018a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner current = *old; 2019a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2020a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2021a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner next = current->link; 2022a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2023a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2024a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2025a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2026a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2027a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2028a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Vertical Sweep Procedure Set */ 2029a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2030a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* These four routines are used during the vertical black/white sweep */ 2031a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* phase by the generic Draw_Sweep() function. */ 2032a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2033a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2034a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2035a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2036a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Sweep_Init( RAS_ARGS Short* min, 2037a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short* max ) 2038a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2039a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long pitch = ras.target.pitch; 2040a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2041a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( max ); 2042a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2043a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2044a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceIncr = (Short)-pitch; 2045a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs = -*min * pitch; 2046a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( pitch > 0 ) 2047a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs += ( ras.target.rows - 1 ) * pitch; 2048a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2049a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_min_x = 0; 2050a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_max_x = 0; 2051a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2052a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2053a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2054a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2055a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Sweep_Span( RAS_ARGS Short y, 2056a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2057a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2058a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2059a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2060a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2061a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long e1, e2; 2062a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short c1, c2; 2063a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte f1, f2; 2064a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte* target; 2065a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2066a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( y ); 2067a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( left ); 2068a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( right ); 2069a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2070a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2071a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Drop-out control */ 2072a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2073a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( CEILING( x1 ) ); 2074a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2075a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x2 - x1 - ras.precision <= ras.precision_jitter ) 2076a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = e1; 2077a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2078a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = TRUNC( FLOOR( x2 ) ); 2079a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2080a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e2 >= 0 && e1 < ras.bWidth ) 2081a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2082a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 < 0 ) 2083a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = 0; 2084a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e2 >= ras.bWidth ) 2085a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = ras.bWidth - 1; 2086a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2087a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c1 = (Short)( e1 >> 3 ); 2088a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2 = (Short)( e2 >> 3 ); 2089a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2090a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = (unsigned char)0xFF >> ( e1 & 7 ); 2091a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f2 = ~( (unsigned char)0x7F >> ( e2 & 7 ) ); 2092a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2093a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_min_x > c1 ) ras.gray_min_x = c1; 2094a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_max_x < c2 ) ras.gray_max_x = c2; 2095a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2096a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner target = ras.bTarget + ras.traceOfs + c1; 2097a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2 -= c1; 2098a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2099a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( c2 > 0 ) 2100a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2101a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner target[0] |= f1; 2102a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2103a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* memset() is slower than the following code on many platforms. */ 2104a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* This is due to the fact that, in the vast majority of cases, */ 2105a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* the span length in bytes is relatively small. */ 2106a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2--; 2107a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( c2 > 0 ) 2108a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2109a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *(++target) = 0xFF; 2110a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2--; 2111a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2112a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner target[1] |= f2; 2113a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2114a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2115a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *target |= ( f1 & f2 ); 2116a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2117a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2118a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2119a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2120a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2121a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Sweep_Drop( RAS_ARGS Short y, 2122a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2123a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2124a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2125a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2126a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2127a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long e1, e2; 2128a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short c1, f1; 2129a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2130a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2131a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Drop-out control */ 2132a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2133a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( x1 ); 2134a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = FLOOR ( x2 ); 2135a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2136a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 > e2 ) 2137a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2138a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 == e2 + ras.precision ) 2139a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2140a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( ras.dropOutControl ) 2141a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2142a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 1: 2143a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2144a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2145a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2146a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 4: 2147a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( (x1 + x2 + 1) / 2 ); 2148a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2149a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2150a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 2: 2151a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 5: 2152a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Drop-out Control Rule #4 */ 2153a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2154a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The spec is not very clear regarding rule #4. It */ 2155a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* presents a method that is way too costly to implement */ 2156a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* while the general idea seems to get rid of `stubs'. */ 2157a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2158a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Here, we only get rid of stubs recognized if: */ 2159a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2160a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* upper stub: */ 2161a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2162a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - P_Left and P_Right are in the same contour */ 2163a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - P_Right is the successor of P_Left in that contour */ 2164a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - y is the top of P_Left and P_Right */ 2165a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2166a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* lower stub: */ 2167a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2168a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - P_Left and P_Right are in the same contour */ 2169a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - P_Left is the successor of P_Right in that contour */ 2170a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - y is the bottom of P_Left */ 2171a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2172a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2173a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* FIXXXME: uncommenting this line solves the disappearing */ 2174a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* bit problem in the `7' of verdana 10pts, but */ 2175a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* makes a new one in the `C' of arial 14pts */ 2176a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2177a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#if 0 2178a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x2 - x1 < ras.precision_half ) 2179a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 2180a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2181a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* upper stub test */ 2182a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( left->next == right && left->height <= 0 ) 2183a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2184a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2185a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* lower stub test */ 2186a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( right->next == left && left->start == y ) 2187a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2188a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2189a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2190a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* check that the rightmost pixel isn't set */ 2191a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2192a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ); 2193a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2194a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c1 = (Short)( e1 >> 3 ); 2195a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = e1 & 7; 2196a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2197a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 && e1 < ras.bWidth && 2198a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bTarget[ras.traceOfs + c1] & ( 0x80 >> f1 ) ) 2199a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2200a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2201a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.dropOutControl == 2 ) 2202a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2203a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2204a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); 2205a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2206a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2207a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2208a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 2209a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; /* unsupported mode */ 2210a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2211a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2212a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2213a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2214a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2215a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2216a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ); 2217a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2218a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 && e1 < ras.bWidth ) 2219a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2220a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c1 = (Short)( e1 >> 3 ); 2221a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = e1 & 7; 2222a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2223a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_min_x > c1 ) ras.gray_min_x = c1; 2224a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_max_x < c1 ) ras.gray_max_x = c1; 2225a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2226a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bTarget[ras.traceOfs + c1] |= (char)( 0x80 >> f1 ); 2227a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2228a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2229a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2230a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2231a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2232a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Sweep_Step( RAS_ARG ) 2233a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2234a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs += ras.traceIncr; 2235a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2236a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2237a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2238a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /***********************************************************************/ 2239a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2240a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Horizontal Sweep Procedure Set */ 2241a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2242a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* These four routines are used during the horizontal black/white */ 2243a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* sweep phase by the generic Draw_Sweep() function. */ 2244a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2245a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /***********************************************************************/ 2246a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2247a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2248a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Sweep_Init( RAS_ARGS Short* min, 2249a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short* max ) 2250a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2251a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* nothing, really */ 2252a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( raster ); 2253a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( min ); 2254a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( max ); 2255a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2256a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2257a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2258a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2259a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Sweep_Span( RAS_ARGS Short y, 2260a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2261a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2262a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2263a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2264a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2265a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long e1, e2; 2266a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte bits; 2267a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte f1; 2268a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2269a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( left ); 2270a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( right ); 2271a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2272a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2273a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x2 - x1 < ras.precision ) 2274a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2275a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( x1 ); 2276a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = FLOOR ( x2 ); 2277a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2278a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 == e2 ) 2279a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2280a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits = ras.bTarget + ( y >> 3 ); 2281a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = (Byte)( 0x80 >> ( y & 7 ) ); 2282a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2283a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ); 2284a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2285a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 && e1 < ras.target.rows ) 2286a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2287a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte p; 2288a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2289a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2290a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p = bits - e1*ras.target.pitch; 2291a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.target.pitch > 0 ) 2292a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p += ( ras.target.rows - 1 ) * ras.target.pitch; 2293a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2294a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner p[0] |= f1; 2295a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2296a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2297a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2298a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2299a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2300a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2301a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2302a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Sweep_Drop( RAS_ARGS Short y, 2303a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2304a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2305a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2306a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2307a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2308a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long e1, e2; 2309a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte bits; 2310a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte f1; 2311a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2312a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2313a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* During the horizontal sweep, we only take care of drop-outs */ 2314a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2315a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( x1 ); 2316a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = FLOOR ( x2 ); 2317a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2318a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 > e2 ) 2319a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2320a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 == e2 + ras.precision ) 2321a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2322a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( ras.dropOutControl ) 2323a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2324a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 1: 2325a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2326a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2327a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2328a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 4: 2329a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); 2330a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2331a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2332a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 2: 2333a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 5: 2334a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2335a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Drop-out Control Rule #4 */ 2336a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2337a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The spec is not very clear regarding rule #4. It */ 2338a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* presents a method that is way too costly to implement */ 2339a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* while the general idea seems to get rid of `stubs'. */ 2340a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2341a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2342a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* rightmost stub test */ 2343a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( left->next == right && left->height <= 0 ) 2344a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2345a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2346a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* leftmost stub test */ 2347a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( right->next == left && left->start == y ) 2348a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2349a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2350a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* check that the rightmost pixel isn't set */ 2351a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2352a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ); 2353a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2354a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits = ras.bTarget + ( y >> 3 ); 2355a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = (Byte)( 0x80 >> ( y & 7 ) ); 2356a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2357a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits -= e1 * ras.target.pitch; 2358a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.target.pitch > 0 ) 2359a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits += ( ras.target.rows - 1 ) * ras.target.pitch; 2360a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2361a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 && 2362a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 < ras.target.rows && 2363a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *bits & f1 ) 2364a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2365a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2366a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.dropOutControl == 2 ) 2367a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2368a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2369a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); 2370a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2371a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2372a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2373a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 2374a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; /* unsupported mode */ 2375a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2376a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2377a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2378a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2379a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2380a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2381a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits = ras.bTarget + ( y >> 3 ); 2382a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner f1 = (Byte)( 0x80 >> ( y & 7 ) ); 2383a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2384a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ); 2385a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2386a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 && e1 < ras.target.rows ) 2387a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2388a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits -= e1 * ras.target.pitch; 2389a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.target.pitch > 0 ) 2390a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits += ( ras.target.rows - 1 ) * ras.target.pitch; 2391a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2392a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bits[0] |= f1; 2393a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2394a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2395a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2396a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2397a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2398a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Sweep_Step( RAS_ARG ) 2399a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2400a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Nothing, really */ 2401a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( raster ); 2402a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2403a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2404a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2405a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_RASTER_OPTION_ANTI_ALIASING 2406a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2407a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2408a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2409a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2410a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Vertical Gray Sweep Procedure Set */ 2411a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2412a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* These two routines are used during the vertical gray-levels sweep */ 2413a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* phase by the generic Draw_Sweep() function. */ 2414a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2415a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* NOTES */ 2416a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2417a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - The target pixmap's width *must* be a multiple of 4. */ 2418a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2419a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* - You have to use the function Vertical_Sweep_Span() for the gray */ 2420a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* span call. */ 2421a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2422a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2423a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2424a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2425a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Gray_Sweep_Init( RAS_ARGS Short* min, 2426a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short* max ) 2427a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2428a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long pitch, byte_len; 2429a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2430a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2431a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *min = *min & -2; 2432a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *max = ( *max + 3 ) & -2; 2433a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2434a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs = 0; 2435a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pitch = ras.target.pitch; 2436a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner byte_len = -pitch; 2437a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceIncr = (Short)byte_len; 2438a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceG = ( *min / 2 ) * byte_len; 2439a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2440a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( pitch > 0 ) 2441a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2442a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceG += ( ras.target.rows - 1 ) * pitch; 2443a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner byte_len = -byte_len; 2444a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2445a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2446a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_min_x = (Short)byte_len; 2447a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_max_x = -(Short)byte_len; 2448a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2449a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2450a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2451a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2452a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Vertical_Gray_Sweep_Step( RAS_ARG ) 2453a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2454a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int c1, c2; 2455a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte pix, bit, bit2; 2456a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int* count = ras.count_table; 2457a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte* grays; 2458a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2459a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2460a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs += ras.gray_width; 2461a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2462a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.traceOfs > ras.gray_width ) 2463a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2464a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix = ras.gTarget + ras.traceG + ras.gray_min_x * 4; 2465a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner grays = ras.grays; 2466a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2467a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_max_x >= 0 ) 2468a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2469a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long last_pixel = ras.target.width - 1; 2470a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int last_cell = last_pixel >> 2; 2471a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Int last_bit = last_pixel & 3; 2472a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool over = 0; 2473a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2474a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2475a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_max_x >= last_cell && last_bit != 3 ) 2476a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2477a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_max_x = last_cell - 1; 2478a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner over = 1; 2479a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2480a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2481a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.gray_min_x < 0 ) 2482a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_min_x = 0; 2483a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2484a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bit = ras.bTarget + ras.gray_min_x; 2485a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bit2 = bit + ras.gray_width; 2486a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2487a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c1 = ras.gray_max_x - ras.gray_min_x; 2488a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2489a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( c1 >= 0 ) 2490a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2491a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2 = count[*bit] + count[*bit2]; 2492a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2493a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( c2 ) 2494a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2495a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[0] = grays[(c2 >> 12) & 0x000F]; 2496a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[1] = grays[(c2 >> 8 ) & 0x000F]; 2497a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[2] = grays[(c2 >> 4 ) & 0x000F]; 2498a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[3] = grays[ c2 & 0x000F]; 2499a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2500a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *bit = 0; 2501a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *bit2 = 0; 2502a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2503a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2504a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bit++; 2505a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bit2++; 2506a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix += 4; 2507a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c1--; 2508a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2509a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2510a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( over ) 2511a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2512a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c2 = count[*bit] + count[*bit2]; 2513a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( c2 ) 2514a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2515a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( last_bit ) 2516a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2517a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 2: 2518a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[2] = grays[(c2 >> 4 ) & 0x000F]; 2519a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 1: 2520a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[1] = grays[(c2 >> 8 ) & 0x000F]; 2521a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 2522a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pix[0] = grays[(c2 >> 12) & 0x000F]; 2523a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2524a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2525a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *bit = 0; 2526a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *bit2 = 0; 2527a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2528a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2529a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2530a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2531a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceOfs = 0; 2532a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.traceG += ras.traceIncr; 2533a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2534a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_min_x = 32000; 2535a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gray_max_x = -32000; 2536a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2537a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2538a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2539a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2540a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2541a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Gray_Sweep_Span( RAS_ARGS Short y, 2542a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2543a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2544a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2545a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2546a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2547a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* nothing, really */ 2548a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( raster ); 2549a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( y ); 2550a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( x1 ); 2551a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( x2 ); 2552a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( left ); 2553a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( right ); 2554a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2555a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2556a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2557a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2558a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void Horizontal_Gray_Sweep_Drop( RAS_ARGS Short y, 2559a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x1, 2560a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_F26Dot6 x2, 2561a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile left, 2562a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile right ) 2563a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2564a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long e1, e2; 2565a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PByte pixel; 2566a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Byte color; 2567a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2568a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2569a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* During the horizontal sweep, we only take care of drop-outs */ 2570a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( x1 ); 2571a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = FLOOR ( x2 ); 2572a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2573a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 > e2 ) 2574a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2575a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 == e2 + ras.precision ) 2576a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2577a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( ras.dropOutControl ) 2578a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2579a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 1: 2580a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2581a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2582a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2583a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 4: 2584a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); 2585a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2586a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2587a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 2: 2588a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case 5: 2589a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2590a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Drop-out Control Rule #4 */ 2591a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2592a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* The spec is not very clear regarding rule #4. It */ 2593a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* presents a method that is way too costly to implement */ 2594a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* while the general idea seems to get rid of `stubs'. */ 2595a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2596a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2597a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* rightmost stub test */ 2598a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( left->next == right && left->height <= 0 ) 2599a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2600a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2601a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* leftmost stub test */ 2602a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( right->next == left && left->start == y ) 2603a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2604a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2605a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.dropOutControl == 2 ) 2606a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = e2; 2607a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2608a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = CEILING( ( x1 + x2 + 1 ) / 2 ); 2609a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2610a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2611a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2612a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner default: 2613a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; /* unsupported mode */ 2614a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2615a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2616a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2617a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return; 2618a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2619a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2620a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 >= 0 ) 2621a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2622a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x2 - x1 >= ras.precision_half ) 2623a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner color = ras.grays[2]; 2624a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2625a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner color = ras.grays[1]; 2626a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2627a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = TRUNC( e1 ) / 2; 2628a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( e1 < ras.target.rows ) 2629a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2630a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pixel = ras.gTarget - e1 * ras.target.pitch + y / 2; 2631a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.target.pitch > 0 ) 2632a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pixel += ( ras.target.rows - 1 ) * ras.target.pitch; 2633a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2634a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( pixel[0] == ras.grays[0] ) 2635a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pixel[0] = color; 2636a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2637a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2638a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2639a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2640a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2641a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* FT_RASTER_OPTION_ANTI_ALIASING */ 2642a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2643a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2644a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2645a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2646a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Generic Sweep Drawing routine */ 2647a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2648a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2649a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2650a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2651a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Bool Draw_Sweep( RAS_ARG ) 2652a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2653a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short y, y_change, y_height; 2654a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2655a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner PProfile P, Q, P_Left, P_Right; 2656a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2657a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short min_Y, max_Y, top, bottom, dropouts; 2658a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2659a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long x1, x2, xs, e1, e2; 2660a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2661a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TProfileList wait; 2662a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TProfileList draw_left, draw_right; 2663a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2664a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2665a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Init empty linked lists */ 2666a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2667a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Init_Linked( &wait ); 2668a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2669a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Init_Linked( &draw_left ); 2670a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Init_Linked( &draw_right ); 2671a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2672a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* first, compute min and max Y */ 2673a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2674a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = ras.fProfile; 2675a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner max_Y = (Short)TRUNC( ras.minY ); 2676a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner min_Y = (Short)TRUNC( ras.maxY ); 2677a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2678a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P ) 2679a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2680a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Q = P->link; 2681a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2682a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner bottom = (Short)P->start; 2683a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner top = (Short)P->start + P->height - 1; 2684a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2685a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( min_Y > bottom ) min_Y = bottom; 2686a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( max_Y < top ) max_Y = top; 2687a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2688a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P->X = 0; 2689a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner InsNew( &wait, P ); 2690a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2691a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = Q; 2692a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2693a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2694a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Check the Y-turns */ 2695a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.numTurns == 0 ) 2696a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2697a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Invalid; 2698a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 2699a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2700a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2701a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Now inits the sweep */ 2702a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2703a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Init( RAS_VARS &min_Y, &max_Y ); 2704a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2705a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Then compute the distance of each profile from min_Y */ 2706a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2707a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = wait; 2708a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2709a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P ) 2710a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2711a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P->countL = P->start - min_Y; 2712a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = P->link; 2713a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2714a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2715a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Let's go */ 2716a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2717a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y = min_Y; 2718a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y_height = 0; 2719a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2720a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.numTurns > 0 && 2721a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.sizeBuff[-ras.numTurns] == min_Y ) 2722a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.numTurns--; 2723a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2724a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( ras.numTurns > 0 ) 2725a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2726a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* look in the wait list for new activations */ 2727a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2728a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = wait; 2729a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2730a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P ) 2731a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2732a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Q = P->link; 2733a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P->countL -= y_height; 2734a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( P->countL == 0 ) 2735a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2736a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner DelOld( &wait, P ); 2737a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2738a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner switch ( P->flow ) 2739a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2740a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Flow_Up: 2741a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner InsNew( &draw_left, P ); 2742a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2743a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2744a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner case Flow_Down: 2745a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner InsNew( &draw_right, P ); 2746a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner break; 2747a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2748a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2749a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2750a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = Q; 2751a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2752a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2753a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Sort the drawing lists */ 2754a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2755a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Sort( &draw_left ); 2756a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Sort( &draw_right ); 2757a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2758a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y_change = (Short)ras.sizeBuff[-ras.numTurns--]; 2759a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y_height = y_change - y; 2760a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2761a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( y < y_change ) 2762a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2763a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Let's trace */ 2764a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2765a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner dropouts = 0; 2766a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2767a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left = draw_left; 2768a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right = draw_right; 2769a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2770a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P_Left ) 2771a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2772a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 = P_Left ->X; 2773a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x2 = P_Right->X; 2774a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2775a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x1 > x2 ) 2776a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2777a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner xs = x1; 2778a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x1 = x2; 2779a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner x2 = xs; 2780a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2781a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2782a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( x2 - x1 <= ras.precision ) 2783a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2784a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e1 = FLOOR( x1 ); 2785a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner e2 = CEILING( x2 ); 2786a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2787a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.dropOutControl != 0 && 2788a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ( e1 > e2 || e2 == e1 + ras.precision ) ) 2789a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2790a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* a drop out was detected */ 2791a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2792a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left ->X = x1; 2793a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right->X = x2; 2794a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2795a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* mark profile for drop-out processing */ 2796a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left->countL = 1; 2797a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner dropouts++; 2798a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2799a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Skip_To_Next; 2800a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2801a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2802a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2803a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Span( RAS_VARS y, x1, x2, P_Left, P_Right ); 2804a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2805a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Skip_To_Next: 2806a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2807a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left = P_Left->link; 2808a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right = P_Right->link; 2809a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2810a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2811a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* now perform the dropouts _after_ the span drawing -- */ 2812a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* drop-outs processing has been moved out of the loop */ 2813a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* for performance tuning */ 2814a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( dropouts > 0 ) 2815a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Scan_DropOuts; 2816a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2817a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Next_Line: 2818a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2819a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step( RAS_VAR ); 2820a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2821a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y++; 2822a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2823a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( y < y_change ) 2824a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2825a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Sort( &draw_left ); 2826a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Sort( &draw_right ); 2827a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2828a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2829a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2830a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Now finalize the profiles that needs it */ 2831a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2832a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = draw_left; 2833a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P ) 2834a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2835a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Q = P->link; 2836a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( P->height == 0 ) 2837a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner DelOld( &draw_left, P ); 2838a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = Q; 2839a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2840a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2841a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = draw_right; 2842a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P ) 2843a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2844a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Q = P->link; 2845a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( P->height == 0 ) 2846a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner DelOld( &draw_right, P ); 2847a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P = Q; 2848a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2849a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2850a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2851a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* for gray-scaling, flushes the bitmap scanline cache */ 2852a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( y <= max_Y ) 2853a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2854a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step( RAS_VAR ); 2855a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner y++; 2856a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2857a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2858a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 2859a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2860a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Scan_DropOuts: 2861a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2862a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left = draw_left; 2863a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right = draw_right; 2864a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2865a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( P_Left ) 2866a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2867a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( P_Left->countL ) 2868a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2869a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left->countL = 0; 2870a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#if 0 2871a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner dropouts--; /* -- this is useful when debugging only */ 2872a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 2873a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Drop( RAS_VARS y, 2874a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left->X, 2875a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right->X, 2876a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left, 2877a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right ); 2878a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2879a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2880a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Left = P_Left->link; 2881a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner P_Right = P_Right->link; 2882a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2883a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2884a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner goto Next_Line; 2885a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2886a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2887a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2888a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2889a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2890a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 2891a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Render_Single_Pass */ 2892a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2893a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 2894a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Performs one sweep with sub-banding. */ 2895a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2896a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Input> */ 2897a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* flipped :: If set, flip the direction of the outline. */ 2898a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2899a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 2900a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Renderer error code. */ 2901a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2902a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 2903a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner int Render_Single_Pass( RAS_ARGS Bool flipped ) 2904a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2905a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Short i, j, k; 2906a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2907a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2908a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner while ( ras.band_top >= 0 ) 2909a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2910a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.maxY = (Long)ras.band_stack[ras.band_top].y_max * ras.precision; 2911a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.minY = (Long)ras.band_stack[ras.band_top].y_min * ras.precision; 2912a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2913a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.top = ras.buff; 2914a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2915a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_None; 2916a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2917a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Convert_Glyph( RAS_VARS flipped ) ) 2918a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2919a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.error != Raster_Err_Overflow ) 2920a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FAILURE; 2921a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2922a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_None; 2923a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2924a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* sub-banding */ 2925a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2926a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef DEBUG_RASTER 2927a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ClearBand( RAS_VARS TRUNC( ras.minY ), TRUNC( ras.maxY ) ); 2928a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 2929a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2930a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner i = ras.band_stack[ras.band_top].y_min; 2931a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner j = ras.band_stack[ras.band_top].y_max; 2932a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2933a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner k = ( i + j ) / 2; 2934a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2935a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.band_top >= 7 || k < i ) 2936a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2937a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top = 0; 2938a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.error = Raster_Err_Invalid; 2939a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2940a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return ras.error; 2941a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2942a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2943a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[ras.band_top + 1].y_min = k; 2944a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[ras.band_top + 1].y_max = j; 2945a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2946a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[ras.band_top].y_max = k - 1; 2947a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2948a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top++; 2949a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2950a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner else 2951a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2952a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.fProfile ) 2953a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( Draw_Sweep( RAS_VAR ) ) 2954a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return ras.error; 2955a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top--; 2956a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2957a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2958a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2959a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return SUCCESS; 2960a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 2961a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2962a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2963a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 2964a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2965a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 2966a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Render_Glyph */ 2967a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2968a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 2969a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Renders a glyph in a bitmap. Sub-banding if needed. */ 2970a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2971a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 2972a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* FreeType error code. 0 means success. */ 2973a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 2974a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner LOCAL_FUNC 2975a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error Render_Glyph( RAS_ARG ) 2976a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 2977a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error error; 2978a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2979a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2980a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Set_High_Precision( RAS_VARS ras.outline.flags & 2981a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ft_outline_high_precision ); 2982a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.scale_shift = ras.precision_shift; 2983a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.dropOutControl = 2; 2984a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.second_pass = !( ras.outline.flags & ft_outline_single_pass ); 2985a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2986a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Vertical Sweep */ 2987a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Init = Vertical_Sweep_Init; 2988a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Span = Vertical_Sweep_Span; 2989a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Drop = Vertical_Sweep_Drop; 2990a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step = Vertical_Sweep_Step; 2991a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2992a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top = 0; 2993a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_min = 0; 2994a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_max = ras.target.rows - 1; 2995a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2996a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bWidth = ras.target.width; 2997a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bTarget = (Byte*)ras.target.buffer; 2998a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 2999a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ( error = Render_Single_Pass( RAS_VARS 0 ) ) != 0 ) 3000a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return error; 3001a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3002a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Horizontal Sweep */ 3003a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.second_pass && ras.dropOutControl != 0 ) 3004a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3005a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Init = Horizontal_Sweep_Init; 3006a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Span = Horizontal_Sweep_Span; 3007a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Drop = Horizontal_Sweep_Drop; 3008a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step = Horizontal_Sweep_Step; 3009a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3010a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top = 0; 3011a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_min = 0; 3012a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_max = ras.target.width - 1; 3013a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3014a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ( error = Render_Single_Pass( RAS_VARS 1 ) ) != 0 ) 3015a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return error; 3016a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3017a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3018a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FT_Err_Ok; 3019a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3020a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3021a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3022a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_RASTER_OPTION_ANTI_ALIASING 3023a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3024a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3025a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /*************************************************************************/ 3026a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 3027a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Function> */ 3028a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Render_Gray_Glyph */ 3029a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 3030a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Description> */ 3031a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Renders a glyph with grayscaling. Sub-banding if needed. */ 3032a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 3033a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* <Return> */ 3034a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* FreeType error code. 0 means success. */ 3035a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* */ 3036a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner LOCAL_FUNC 3037a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error Render_Gray_Glyph( RAS_ARG ) 3038a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3039a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Long pixel_width; 3040a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error error; 3041a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3042a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3043a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner Set_High_Precision( RAS_VARS ras.outline.flags & 3044a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ft_outline_high_precision ); 3045a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.scale_shift = ras.precision_shift + 1; 3046a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.dropOutControl = 2; 3047a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.second_pass = !( ras.outline.flags & ft_outline_single_pass ); 3048a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3049a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Vertical Sweep */ 3050a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3051a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top = 0; 3052a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_min = 0; 3053a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_max = 2 * ras.target.rows - 1; 3054a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3055a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bWidth = ras.gray_width; 3056a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner pixel_width = 2 * ( ( ras.target.width + 3 ) >> 2 ); 3057a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3058a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.bWidth > pixel_width ) 3059a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bWidth = pixel_width; 3060a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3061a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bWidth = ras.bWidth * 8; 3062a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.bTarget = (Byte*)ras.gray_lines; 3063a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.gTarget = (Byte*)ras.target.buffer; 3064a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3065a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Init = Vertical_Gray_Sweep_Init; 3066a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Span = Vertical_Sweep_Span; 3067a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Drop = Vertical_Sweep_Drop; 3068a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step = Vertical_Gray_Sweep_Step; 3069a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3070a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner error = Render_Single_Pass( RAS_VARS 0 ); 3071a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( error ) 3072a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return error; 3073a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3074a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* Horizontal Sweep */ 3075a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( ras.second_pass && ras.dropOutControl != 0 ) 3076a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3077a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Init = Horizontal_Sweep_Init; 3078a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Span = Horizontal_Gray_Sweep_Span; 3079a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Drop = Horizontal_Gray_Sweep_Drop; 3080a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.Proc_Sweep_Step = Horizontal_Sweep_Step; 3081a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3082a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_top = 0; 3083a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_min = 0; 3084a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.band_stack[0].y_max = ras.target.width * 2 - 1; 3085a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3086a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner error = Render_Single_Pass( RAS_VARS 1 ); 3087a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( error ) 3088a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return error; 3089a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3090a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3091a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FT_Err_Ok; 3092a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3093a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3094a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else /* FT_RASTER_OPTION_ANTI_ALIASING */ 3095a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3096a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner LOCAL_FUNC 3097a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error Render_Gray_Glyph( RAS_ARG ) 3098a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3099a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED_RASTER; 3100a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3101a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return FT_Err_Cannot_Render_Glyph; 3102a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3103a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3104a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* FT_RASTER_OPTION_ANTI_ALIASING */ 3105a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3106a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3107a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3108a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void ft_black_init( TRaster_Instance* raster ) 3109a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3110a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UInt n; 3111a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_ULong c; 3112a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3113a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3114a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* setup count table */ 3115a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner for ( n = 0; n < 256; n++ ) 3116a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3117a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = ( n & 0x55 ) + ( ( n & 0xAA ) >> 1 ); 3118a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3119a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner c = ( ( c << 6 ) & 0x3000 ) | 3120a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ( ( c << 4 ) & 0x0300 ) | 3121a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ( ( c << 2 ) & 0x0030 ) | 3122a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (c & 0x0003 ); 3123a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3124a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->count_table[n] = c; 3125a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3126a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3127a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_RASTER_OPTION_ANTI_ALIASING 3128a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3129a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* set default 5-levels gray palette */ 3130a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner for ( n = 0; n < 5; n++ ) 3131a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[n] = n * 255 / 4; 3132a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3133a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->gray_width = RASTER_GRAY_LINES / 2; 3134a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3135a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 3136a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3137a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3138a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3139a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /**** RASTER OBJECT CREATION: In standalone mode, we simply use *****/ 3140a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /**** a static object. *****/ 3141a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3142a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3143a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef _STANDALONE_ 3144a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3145a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3146a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3147a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner int ft_black_new( void* memory, 3148a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Raster *araster ) 3149a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3150a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static FT_RasterRec_ the_raster; 3151a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3152a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3153a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *araster = &the_raster; 3154a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner memset( &the_raster, sizeof ( the_raster ), 0 ); 3155a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ft_black_init( &the_raster ); 3156a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3157a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return 0; 3158a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3159a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3160a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3161a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3162a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void ft_black_done( FT_Raster raster ) 3163a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3164a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* nothing */ 3165a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->init = 0; 3166a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3167a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3168a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3169a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else /* _STANDALONE_ */ 3170a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3171a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3172a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3173a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner int ft_black_new( FT_Memory memory, 3174a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TRaster_Instance** araster ) 3175a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3176a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Error error; 3177a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner TRaster_Instance* raster; 3178a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3179a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3180a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *araster = 0; 3181a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !ALLOC( raster, sizeof ( *raster ) ) ) 3182a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3183a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->memory = memory; 3184a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ft_black_init( raster ); 3185a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3186a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner *araster = raster; 3187a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3188a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3189a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return error; 3190a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3191a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3192a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3193a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3194a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void ft_black_done( TRaster_Instance* raster ) 3195a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3196a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Memory memory = (FT_Memory)raster->memory; 3197a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FREE( raster ); 3198a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3199a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3200a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3201a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif /* _STANDALONE_ */ 3202a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3203a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3204a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3205a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void ft_black_reset( TRaster_Instance* raster, 3206a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner const char* pool_base, 3207a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner long pool_size ) 3208a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3209a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( raster && pool_base && pool_size >= 4096 ) 3210a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3211a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* save the pool */ 3212a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->buff = (PLong)pool_base; 3213a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->sizeBuff = raster->buff + pool_size / sizeof ( Long ); 3214a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3215a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3216a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3217a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3218a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3219a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner void ft_black_set_mode( TRaster_Instance* raster, 3220a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner unsigned long mode, 3221a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner const char* palette ) 3222a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3223a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#ifdef FT_RASTER_OPTION_ANTI_ALIASING 3224a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3225a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( mode == FT_MAKE_TAG( 'p', 'a', 'l', '5' ) ) 3226a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3227a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* set 5-levels gray palette */ 3228a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[0] = palette[0]; 3229a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[1] = palette[1]; 3230a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[2] = palette[2]; 3231a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[3] = palette[3]; 3232a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner raster->grays[4] = palette[4]; 3233a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3234a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3235a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#else 3236a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3237a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( raster ); 3238a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( mode ); 3239a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_UNUSED( palette ); 3240a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3241a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner#endif 3242a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3243a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3244a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3245a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner static 3246a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner int ft_black_render( TRaster_Instance* raster, 3247a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Raster_Params* params ) 3248a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3249a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Outline* outline = (FT_Outline*)params->source; 3250a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner FT_Bitmap* target_map = params->target; 3251a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3252a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3253a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !raster || !raster->buff || !raster->sizeBuff ) 3254a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_Not_Ini; 3255a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3256a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* return immediately if the outline is empty */ 3257a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( outline->n_points == 0 || outline->n_contours <= 0 ) 3258a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_None; 3259a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3260a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !outline || !outline->contours || !outline->points ) 3261a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_Invalid; 3262a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3263a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( outline->n_points != outline->contours[outline->n_contours - 1] + 1 ) 3264a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_Invalid; 3265a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3266a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( !target_map || !target_map->buffer ) 3267a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_Invalid; 3268a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3269a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner /* this version of the raster does not support direct rendering, sorry */ 3270a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner if ( params->flags & ft_raster_flag_direct ) 3271a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return Raster_Err_Unsupported; 3272a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3273a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.outline = *outline; 3274a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ras.target = *target_map; 3275a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3276a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner return ( ( params->flags & ft_raster_flag_aa ) 3277a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ? Render_Gray_Glyph( raster ) 3278a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner : Render_Glyph( raster ) ); 3279a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner } 3280a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3281a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3282a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner const FT_Raster_Funcs ft_standard_raster = 3283a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner { 3284a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner ft_glyph_format_outline, 3285a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (FT_Raster_New_Func) ft_black_new, 3286a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (FT_Raster_Reset_Func) ft_black_reset, 3287a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (FT_Raster_Set_Mode_Func)ft_black_set_mode, 3288a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (FT_Raster_Render_Func) ft_black_render, 3289a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner (FT_Raster_Done_Func) ft_black_done 3290a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner }; 3291a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3292a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner 3293a4e2894e03de65c5e0cd14b11b6fa30b14ed6769David Turner/* END */ 3294