1049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/***************************************************************************/ 2049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* */ 3049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* ftlcdfil.c */ 4049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* */ 5049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* FreeType API for color filtering of subpixel bitmap glyphs (body). */ 6049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* */ 7ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki/* Copyright 2006-2015 by */ 8049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* */ 10049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* This file is part of the FreeType project, and may only be used, */ 11049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* modified, and distributed under the terms of the FreeType project */ 12049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* this file you indicate that you have read the license and */ 14049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* understand and accept it fully. */ 15049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* */ 16049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/***************************************************************************/ 17049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 18049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 19049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#include <ft2build.h> 20727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease#include FT_INTERNAL_DEBUG_H 21727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease 22049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#include FT_LCD_FILTER_H 23049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#include FT_IMAGE_H 24049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#include FT_INTERNAL_OBJECTS_H 25049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 26049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 27049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING 28049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 29049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* define USE_LEGACY to implement the legacy filter */ 30049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#define USE_LEGACY 31049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 32049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* FIR filter used by the default and light filters */ 33049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static void 34049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project _ft_lcd_filter_fir( FT_Bitmap* bitmap, 35049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Render_Mode mode, 36049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Library library ) 37049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 38049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* weights = library->lcd_weights; 39049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt width = (FT_UInt)bitmap->width; 40049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt height = (FT_UInt)bitmap->rows; 41049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 42049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 43049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* horizontal in-place FIR filter */ 44049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project if ( mode == FT_RENDER_MODE_LCD && width >= 4 ) 45049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 46049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* line = bitmap->buffer; 47049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 48049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 49ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki /* take care of bitmap flow */ 50ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( bitmap->pitch < 0 ) 51ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki line -= bitmap->pitch * (FT_Int)( bitmap->rows - 1 ); 52ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki 539c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod /* `fir' and `pix' must be at least 32 bit wide, since the sum of */ 549c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod /* the values in `weights' can exceed 0xFF */ 559c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod 56049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; height > 0; height--, line += bitmap->pitch ) 57049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 589c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod FT_UInt fir[4]; /* below, `pix' is used as the 5th element */ 59049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val1, xx; 60049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 61049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 62049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = line[0]; 63049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = weights[2] * val1; 64049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = weights[3] * val1; 65049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = weights[4] * val1; 66049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = 0; 67049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 68049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = line[1]; 69049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] += weights[1] * val1; 70049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] += weights[2] * val1; 71049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] += weights[3] * val1; 72049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] += weights[4] * val1; 73049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 74049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( xx = 2; xx < width; xx++ ) 75049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 76049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val, pix; 77049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 78049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 79049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val = line[xx]; 80049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] + weights[0] * val; 81049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = fir[1] + weights[1] * val; 82049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = fir[2] + weights[2] * val; 83049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = fir[3] + weights[3] * val; 84049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = weights[4] * val; 85049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 86049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix >>= 8; 879c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 88049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 2] = (FT_Byte)pix; 89049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 90049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 91049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 92049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt pix; 93049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 94049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 95049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] >> 8; 969c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 97049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 2] = (FT_Byte)pix; 98049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 99049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[1] >> 8; 1009c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 101049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 1] = (FT_Byte)pix; 102049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 103049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 104049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 105049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 106049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* vertical in-place FIR filter */ 107049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project else if ( mode == FT_RENDER_MODE_LCD_V && height >= 4 ) 108049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 109049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* column = bitmap->buffer; 110049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Int pitch = bitmap->pitch; 111049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 112049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 113ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki /* take care of bitmap flow */ 114ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( bitmap->pitch < 0 ) 115ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki column -= bitmap->pitch * (FT_Int)( bitmap->rows - 1 ); 116ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki 117049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; width > 0; width--, column++ ) 118049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 119049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* col = column; 1209c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod FT_UInt fir[4]; /* below, `pix' is used as the 5th element */ 121049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val1, yy; 122049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 123049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 124049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = col[0]; 125049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = weights[2] * val1; 126049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = weights[3] * val1; 127049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = weights[4] * val1; 128049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = 0; 129049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 130049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 131049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = col[0]; 132049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] += weights[1] * val1; 133049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] += weights[2] * val1; 134049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] += weights[3] * val1; 135049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] += weights[4] * val1; 136049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 137049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 138049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( yy = 2; yy < height; yy++ ) 139049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 140049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val, pix; 141049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 142049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 143049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val = col[0]; 144049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] + weights[0] * val; 145049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = fir[1] + weights[1] * val; 146049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = fir[2] + weights[2] * val; 147049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = fir[3] + weights[3] * val; 148049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = weights[4] * val; 149049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 150049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix >>= 8; 1519c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 152049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-2 * pitch] = (FT_Byte)pix; 153049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 154049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 155049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 156049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 157049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt pix; 158049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 159049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 160049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] >> 8; 1619c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 162049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-2 * pitch] = (FT_Byte)pix; 163049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 164049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[1] >> 8; 1659c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 166049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-pitch] = (FT_Byte)pix; 167049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 168049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 169049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 170049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 171049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 172049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 173049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#ifdef USE_LEGACY 174049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 175049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* intra-pixel filter used by the legacy filter */ 176049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static void 177049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project _ft_lcd_filter_legacy( FT_Bitmap* bitmap, 178049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Render_Mode mode, 179049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Library library ) 180049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 181049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt width = (FT_UInt)bitmap->width; 182049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt height = (FT_UInt)bitmap->rows; 183049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Int pitch = bitmap->pitch; 184049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 185ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki static const unsigned int filters[3][3] = 186049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 187049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 9/13, 65538 * 1/6, 65538 * 1/13 }, 188049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 3/13, 65538 * 4/6, 65538 * 3/13 }, 189049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 1/13, 65538 * 1/6, 65538 * 9/13 } 190049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project }; 191049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 192049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( library ); 193049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 194049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 195049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* horizontal in-place intra-pixel filter */ 196049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project if ( mode == FT_RENDER_MODE_LCD && width >= 3 ) 197049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 198049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* line = bitmap->buffer; 199049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 200049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 201ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki /* take care of bitmap flow */ 202ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( bitmap->pitch < 0 ) 203ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki line -= bitmap->pitch * (FT_Int)( bitmap->rows - 1 ); 204ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki 205049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; height > 0; height--, line += pitch ) 206049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 207049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt xx; 208049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 209049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 210049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( xx = 0; xx < width; xx += 3 ) 211049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 212049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt r = 0; 213049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt g = 0; 214049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt b = 0; 215049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt p; 216049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 217049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 218049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx]; 219049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[0][0] * p; 220049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[0][1] * p; 221049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[0][2] * p; 222049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 223049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx + 1]; 224049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[1][0] * p; 225049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[1][1] * p; 226049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[1][2] * p; 227049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 228049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx + 2]; 229049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[2][0] * p; 230049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[2][1] * p; 231049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[2][2] * p; 232049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 233049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx] = (FT_Byte)( r / 65536 ); 234049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx + 1] = (FT_Byte)( g / 65536 ); 235049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx + 2] = (FT_Byte)( b / 65536 ); 236049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 237049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 238049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 239049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project else if ( mode == FT_RENDER_MODE_LCD_V && height >= 3 ) 240049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 241049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* column = bitmap->buffer; 242049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 243049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 244ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki /* take care of bitmap flow */ 245ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( bitmap->pitch < 0 ) 246ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki column -= bitmap->pitch * (FT_Int)( bitmap->rows - 1 ); 247ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki 248049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; width > 0; width--, column++ ) 249049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 250049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* col = column; 251ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki FT_Byte* col_end = col + (FT_Int)height * pitch; 252049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 253049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 254049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; col < col_end; col += 3 * pitch ) 255049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 256049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt r = 0; 257049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt g = 0; 258049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt b = 0; 259049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt p; 260049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 261049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 262049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[0]; 263049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[0][0] * p; 264049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[0][1] * p; 265049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[0][2] * p; 266049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 267049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[pitch]; 268049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[1][0] * p; 269049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[1][1] * p; 270049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[1][2] * p; 271049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 272049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[pitch * 2]; 273049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[2][0] * p; 274049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[2][1] * p; 275049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[2][2] * p; 276049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 277049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[0] = (FT_Byte)( r / 65536 ); 278049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[pitch] = (FT_Byte)( g / 65536 ); 279049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[2 * pitch] = (FT_Byte)( b / 65536 ); 280049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 281049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 282049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 283049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 284049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 285049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif /* USE_LEGACY */ 286049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 287049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 2880a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project FT_EXPORT_DEF( FT_Error ) 289aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilterWeights( FT_Library library, 290aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich unsigned char *weights ) 291aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 292ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( !library ) 293ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki return FT_THROW( Invalid_Library_Handle ); 294ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki 295ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki if ( !weights ) 296727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Invalid_Argument ); 297aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 298aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich ft_memcpy( library->lcd_weights, weights, 5 ); 299aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 300aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich return FT_Err_Ok; 301aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich } 302aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 303aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 304aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_EXPORT_DEF( FT_Error ) 305aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilter( FT_Library library, 306aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_LcdFilter filter ) 307049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 308049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static const FT_Byte light_filter[5] = 309aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 0x00, 0x55, 0x56, 0x55, 0x00 }; 310049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* the values here sum up to a value larger than 256, */ 311049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* providing a cheap gamma correction */ 312049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static const FT_Byte default_filter[5] = 313049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 0x10, 0x40, 0x70, 0x40, 0x10 }; 314049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 315049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 316aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich if ( !library ) 317ec62c527eb34ee4481a0153ceb42dfd35d7e1d26Makoto Onuki return FT_THROW( Invalid_Library_Handle ); 318049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 319049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project switch ( filter ) 320049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 321049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_NONE: 322049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = NULL; 323049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 324049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 325049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 326049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_DEFAULT: 327049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#if defined( FT_FORCE_LEGACY_LCD_FILTER ) 328049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 329049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_legacy; 330049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 331049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 332049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#elif defined( FT_FORCE_LIGHT_LCD_FILTER ) 333049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3340a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, light_filter, 5 ); 335049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 336049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 337049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 338049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#else 339049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3400a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, default_filter, 5 ); 341049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 342049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 343049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 344049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif 345049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 346049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 347049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 348049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_LIGHT: 3490a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, light_filter, 5 ); 350049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 351049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 352049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 353049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 354049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#ifdef USE_LEGACY 355049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 356049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_LEGACY: 357049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_legacy; 358049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 359049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 360049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 361049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif 362049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 363049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project default: 364727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Invalid_Argument ); 365049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 366049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 367049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter = filter; 368aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 369aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich return FT_Err_Ok; 370049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 371049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 372049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 373049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3740a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project FT_EXPORT_DEF( FT_Error ) 375aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilterWeights( FT_Library library, 376aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich unsigned char *weights ) 377aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 378aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_UNUSED( library ); 379aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_UNUSED( weights ); 380aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 381727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Unimplemented_Feature ); 382aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich } 383aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 384aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 385aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_EXPORT_DEF( FT_Error ) 386049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Library_SetLcdFilter( FT_Library library, 387049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_LcdFilter filter ) 388049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 389049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( library ); 390049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( filter ); 391049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 392727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Unimplemented_Feature ); 393049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 394049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 395049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 396049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 397049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 398049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* END */ 399