1ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/***************************************************************************/ 2ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 3ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* ttobjs.h */ 4ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 5ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* Objects manager (specification). */ 6ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 7e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov/* Copyright 1996-2009, 2011-2014 by */ 8ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 10ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* This file is part of the FreeType project, and may only be used, */ 11ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* modified, and distributed under the terms of the FreeType project */ 12ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* this file you indicate that you have read the license and */ 14ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* understand and accept it fully. */ 15ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* */ 16ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/***************************************************************************/ 17ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 18ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 19ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifndef __TTOBJS_H__ 20ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define __TTOBJS_H__ 21ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 22ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 23e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include <ft2build.h> 24e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include FT_INTERNAL_OBJECTS_H 25e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov#include FT_INTERNAL_TRUETYPE_TYPES_H 26ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 27ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 28ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovFT_BEGIN_HEADER 29ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 30ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 31ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 32ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 33ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Type> */ 34ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TT_Driver */ 35ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 36ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Description> */ 37ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* A handle to a TrueType driver object. */ 38ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 39ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_DriverRec_* TT_Driver; 40ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 41ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 42ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 43ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 44ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Type> */ 45ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TT_Instance */ 46ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 47ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Description> */ 48ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* A handle to a TrueType size object. */ 49ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 50ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_SizeRec_* TT_Size; 51ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 52ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 53ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 54ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 55ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Type> */ 56ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TT_GlyphSlot */ 57ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 58ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Description> */ 59ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* A handle to a TrueType glyph slot object. */ 60ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 61ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Note> */ 62ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* This is a direct typedef of FT_GlyphSlot, as there is nothing */ 63ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* specific about the TrueType glyph slot. */ 64ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 65ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef FT_GlyphSlot TT_GlyphSlot; 66ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 67ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 68ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 69ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 70ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Struct> */ 71ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TT_GraphicsState */ 72ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 73ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* <Description> */ 74ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The TrueType graphics state used during bytecode interpretation. */ 75ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 76ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_GraphicsState_ 77ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 78ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort rp0; 79ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort rp1; 80ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort rp2; 81ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 82ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UnitVector dualVector; 83ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UnitVector projVector; 84ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UnitVector freeVector; 85ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 86ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING 87ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool both_x_axis; 88ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif 89ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 90ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long loop; 91ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 minimum_distance; 92ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Int round_state; 93ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 94ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool auto_flip; 95ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 control_value_cutin; 96ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 single_width_cutin; 97ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 single_width_value; 98e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov FT_UShort delta_base; 99e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov FT_UShort delta_shift; 100ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 101ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Byte instruct_control; 102ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* According to Greg Hitchcock from Microsoft, the `scan_control' */ 103ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* variable as documented in the TrueType specification is a 32-bit */ 104ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* integer; the high-word part holds the SCANTYPE value, the low-word */ 105ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* part the SCANCTRL value. We separate it into two fields. */ 106ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool scan_control; 107ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Int scan_type; 108ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 109ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort gep0; 110ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort gep1; 111ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort gep2; 112ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 113ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_GraphicsState; 114ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 115ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 116ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef TT_USE_BYTECODE_INTERPRETER 117ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 118ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( void ) 119ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_glyphzone_done( TT_GlyphZone zone ); 120ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 121ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 122ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_glyphzone_new( FT_Memory memory, 123ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort maxPoints, 124ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Short maxContours, 125ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_GlyphZone zone ); 126ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 127ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* TT_USE_BYTECODE_INTERPRETER */ 128ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 129ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 130ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 131ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 132ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 133ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* EXECUTION SUBTABLES */ 134ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 135ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* These sub-tables relate to instruction execution. */ 136ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 137ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 138ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 139ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 140ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define TT_MAX_CODE_RANGES 3 141ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 142ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 143ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 144ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 145ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* There can only be 3 active code ranges at once: */ 146ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - the Font Program */ 147ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - the CVT Program */ 148ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - a glyph's instructions set */ 149ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 150ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef enum TT_CodeRange_Tag_ 151ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 152ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_coderange_none = 0, 153ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_coderange_font, 154ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_coderange_cvt, 155ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_coderange_glyph 156ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 157ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_CodeRange_Tag; 158ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 159ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 160ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_CodeRange_ 161ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 162ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Byte* base; 163ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_ULong size; 164ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 165ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_CodeRange; 166ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 167ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef TT_CodeRange TT_CodeRangeTable[TT_MAX_CODE_RANGES]; 168ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 169ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 170ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 171ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 172ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Defines a function/instruction definition record. */ 173ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 174ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_DefRecord_ 175ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 176ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Int range; /* in which code range is it located? */ 177ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long start; /* where does it start? */ 178ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long end; /* where does it end? */ 179ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt opc; /* function #, or instruction code */ 180ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool active; /* is it active? */ 181ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool inline_delta; /* is function that defines inline delta? */ 182ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_ULong sph_fdef_flags; /* flags to identify special functions */ 183ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 184ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_DefRecord, *TT_DefArray; 185ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 186ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 187ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 188ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 189ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Subglyph transformation record. */ 190ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 191ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_Transform_ 192ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 193ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Fixed xx, xy; /* transformation matrix coefficients */ 194ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Fixed yx, yy; 195ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 ox, oy; /* offsets */ 196ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 197ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_Transform; 198ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 199ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 200ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 201ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 202ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* A note regarding non-squared pixels: */ 203ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 204ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* (This text will probably go into some docs at some time; for now, it */ 205ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* is kept here to explain some definitions in the TT_Size_Metrics */ 206ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* record). */ 207ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 208ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The CVT is a one-dimensional array containing values that control */ 209ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* certain important characteristics in a font, like the height of all */ 210ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* capitals, all lowercase letter, default spacing or stem width/height. */ 211ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 212ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* These values are found in FUnits in the font file, and must be scaled */ 213ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* to pixel coordinates before being used by the CVT and glyph programs. */ 214ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Unfortunately, when using distinct x and y resolutions (or distinct x */ 215ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* and y pointsizes), there are two possible scalings. */ 216ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 217ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* A first try was to implement a `lazy' scheme where all values were */ 218ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* scaled when first used. However, while some values are always used */ 219ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* in the same direction, some others are used under many different */ 220ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* circumstances and orientations. */ 221ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 222ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* I have found a simpler way to do the same, and it even seems to work */ 223ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* in most of the cases: */ 224ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 225ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - All CVT values are scaled to the maximum ppem size. */ 226ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 227ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - When performing a read or write in the CVT, a ratio factor is used */ 228ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* to perform adequate scaling. Example: */ 229ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 230ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* x_ppem = 14 */ 231ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* y_ppem = 10 */ 232ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 233ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We choose ppem = x_ppem = 14 as the CVT scaling size. All cvt */ 234ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* entries are scaled to it. */ 235ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 236ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* x_ratio = 1.0 */ 237ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* y_ratio = y_ppem/ppem (< 1.0) */ 238ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 239ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* We compute the current ratio like: */ 240ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 241ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - If projVector is horizontal, */ 242ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* ratio = x_ratio = 1.0 */ 243ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 244ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - if projVector is vertical, */ 245ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* ratio = y_ratio */ 246ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 247ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* - else, */ 248ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* ratio = sqrt( (proj.x * x_ratio) ^ 2 + (proj.y * y_ratio) ^ 2 ) */ 249ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 250ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Reading a cvt value returns */ 251ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* ratio * cvt[index] */ 252ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 253ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Writing a cvt value in pixels: */ 254ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* cvt[index] / ratio */ 255ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 256ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* The current ppem is simply */ 257ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* ratio * ppem */ 258ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 259ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 260ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 261ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 262ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 263ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 264ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Metrics used by the TrueType size and context objects. */ 265ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 266ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_Size_Metrics_ 267ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 268ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* for non-square pixels */ 269ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long x_ratio; 270ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long y_ratio; 271ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 272ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort ppem; /* maximum ppem size */ 273ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long ratio; /* current ratio */ 274ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Fixed scale; 275ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 276ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_F26Dot6 compensations[4]; /* device-specific compensations */ 277ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 278ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool valid; 279ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 280ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool rotated; /* `is the glyph rotated?'-flag */ 281ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool stretched; /* `is the glyph stretched?'-flag */ 282ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 283ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_Size_Metrics; 284ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 285ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 286ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 287ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 288ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TrueType size class. */ 289ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 290ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_SizeRec_ 291ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 292ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_SizeRec root; 293ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 294ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* we have our own copy of metrics so that we can modify */ 295ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* it without affecting auto-hinting (when used) */ 296ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Size_Metrics metrics; 297ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 298ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_Size_Metrics ttmetrics; 299ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 300ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_ULong strike_index; /* 0xFFFFFFFF to indicate invalid */ 301ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 302ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef TT_USE_BYTECODE_INTERPRETER 303ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 304ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt num_function_defs; /* number of function definitions */ 305ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt max_function_defs; 306ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_DefArray function_defs; /* table of function definitions */ 307ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 308ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt num_instruction_defs; /* number of ins. definitions */ 309ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt max_instruction_defs; 310ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_DefArray instruction_defs; /* table of ins. definitions */ 311ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 312ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt max_func; 313ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt max_ins; 314ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 315ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_CodeRangeTable codeRangeTable; 316ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 317ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_GraphicsState GS; 318ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 319ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_ULong cvt_size; /* the scaled control value table */ 320ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long* cvt; 321ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 322ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UShort storage_size; /* The storage area is now part of */ 323ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Long* storage; /* the instance */ 324ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 325ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_GlyphZoneRec twilight; /* The instance's twilight zone */ 326ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 327ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* debugging variables */ 328ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 329ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* When using the debugger, we must keep the */ 330ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* execution context tied to the instance */ 331ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* object rather than asking it on demand. */ 332ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 333ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool debug; 334ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_ExecContext context; 335ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 336e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* if negative, `fpgm' (resp. `prep'), wasn't executed yet; */ 337e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov /* otherwise it is the returned error code */ 338e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov FT_Error bytecode_ready; 339e6986e1e8d4a57987f47c215490cb080a65ee29aSvet Ganov FT_Error cvt_ready; 340ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 341ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* TT_USE_BYTECODE_INTERPRETER */ 342ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 343ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_SizeRec; 344ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 345ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 346ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 347ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 348ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TrueType driver class. */ 349ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 350ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov typedef struct TT_DriverRec_ 351ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov { 352ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_DriverRec root; 353ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 354ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_ExecContext context; /* execution context */ 355ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov TT_GlyphZoneRec zone; /* glyph loader points zone */ 356ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 357ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_UInt interpreter_version; 358ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 359ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov } TT_DriverRec; 360ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 361ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 362ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Note: All of the functions below (except tt_size_reset()) are used */ 363ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* as function pointers in a FT_Driver_ClassRec. Therefore their */ 364ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* parameters are of types FT_Face, FT_Size, etc., rather than TT_Face, */ 365ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* TT_Size, etc., so that the compiler can confirm that the types and */ 366ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* number of parameters are correct. In all cases the FT_xxx types are */ 367ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* cast to their TT_xxx counterparts inside the functions since FreeType */ 368ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* will always use the TT driver to create them. */ 369ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 370ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 371ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 372ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 373ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Face functions */ 374ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 375ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 376ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_face_init( FT_Stream stream, 377ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Face ttface, /* TT_Face */ 378ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Int face_index, 379ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Int num_params, 380ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Parameter* params ); 381ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 382ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( void ) 383ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_face_done( FT_Face ttface ); /* TT_Face */ 384ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 385ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 386ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 387ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 388ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Size functions */ 389ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 390ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 391ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_init( FT_Size ttsize ); /* TT_Size */ 392ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 393ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( void ) 394ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_done( FT_Size ttsize ); /* TT_Size */ 395ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 396ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#ifdef TT_USE_BYTECODE_INTERPRETER 397ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 398ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 399ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_run_fpgm( TT_Size size, 400ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool pedantic ); 401ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 402ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 403ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_run_prep( TT_Size size, 404ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool pedantic ); 405ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 406ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 407ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_ready_bytecode( TT_Size size, 408ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_Bool pedantic ); 409ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 410ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* TT_USE_BYTECODE_INTERPRETER */ 411ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 412ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 413ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_size_reset( TT_Size size ); 414ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 415ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 416ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 417ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 418ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Driver functions */ 419ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 420ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 421ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_driver_init( FT_Module ttdriver ); /* TT_Driver */ 422ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 423ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( void ) 424ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_driver_done( FT_Module ttdriver ); /* TT_Driver */ 425ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 426ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 427ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /*************************************************************************/ 428ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 429ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* Slot functions */ 430ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* */ 431ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov FT_LOCAL( FT_Error ) 432ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov tt_slot_init( FT_GlyphSlot slot ); 433ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 434ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 435ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov /* auxiliary */ 436ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#define IS_HINTED( flags ) ( ( flags & FT_LOAD_NO_HINTING ) == 0 ) 437ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 438ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 439ee451cb395940862dad63c85adfe8f2fd55e864cSvet GanovFT_END_HEADER 440ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 441ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov#endif /* __TTOBJS_H__ */ 442ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 443ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov 444ee451cb395940862dad63c85adfe8f2fd55e864cSvet Ganov/* END */ 445