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/* */ 79c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod/* Copyright 2006, 2008-2010, 2013, 2014 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 499c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod /* `fir' and `pix' must be at least 32 bit wide, since the sum of */ 509c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod /* the values in `weights' can exceed 0xFF */ 519c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod 52049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; height > 0; height--, line += bitmap->pitch ) 53049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 549c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod FT_UInt fir[4]; /* below, `pix' is used as the 5th element */ 55049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val1, xx; 56049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 57049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 58049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = line[0]; 59049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = weights[2] * val1; 60049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = weights[3] * val1; 61049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = weights[4] * val1; 62049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = 0; 63049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 64049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = line[1]; 65049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] += weights[1] * val1; 66049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] += weights[2] * val1; 67049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] += weights[3] * val1; 68049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] += weights[4] * val1; 69049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 70049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( xx = 2; xx < width; xx++ ) 71049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 72049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val, pix; 73049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 74049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 75049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val = line[xx]; 76049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] + weights[0] * val; 77049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = fir[1] + weights[1] * val; 78049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = fir[2] + weights[2] * val; 79049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = fir[3] + weights[3] * val; 80049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = weights[4] * val; 81049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 82049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix >>= 8; 839c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 84049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 2] = (FT_Byte)pix; 85049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 86049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 87049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 88049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt pix; 89049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 90049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 91049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] >> 8; 929c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 93049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 2] = (FT_Byte)pix; 94049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 95049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[1] >> 8; 969c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 97049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx - 1] = (FT_Byte)pix; 98049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 99049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 100049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 101049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 102049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* vertical in-place FIR filter */ 103049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project else if ( mode == FT_RENDER_MODE_LCD_V && height >= 4 ) 104049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 105049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* column = bitmap->buffer; 106049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Int pitch = bitmap->pitch; 107049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 108049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 109049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; width > 0; width--, column++ ) 110049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 111049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* col = column; 1129c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod FT_UInt fir[4]; /* below, `pix' is used as the 5th element */ 113049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val1, yy; 114049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 115049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 116049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = col[0]; 117049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = weights[2] * val1; 118049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = weights[3] * val1; 119049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = weights[4] * val1; 120049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = 0; 121049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 122049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 123049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val1 = col[0]; 124049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] += weights[1] * val1; 125049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] += weights[2] * val1; 126049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] += weights[3] * val1; 127049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] += weights[4] * val1; 128049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 129049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 130049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( yy = 2; yy < height; yy++ ) 131049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 132049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt val, pix; 133049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 134049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 135049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project val = col[0]; 136049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] + weights[0] * val; 137049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[0] = fir[1] + weights[1] * val; 138049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[1] = fir[2] + weights[2] * val; 139049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[2] = fir[3] + weights[3] * val; 140049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project fir[3] = weights[4] * val; 141049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 142049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix >>= 8; 1439c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 144049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-2 * pitch] = (FT_Byte)pix; 145049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col += pitch; 146049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 147049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 148049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 149049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt pix; 150049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 151049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 152049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[0] >> 8; 1539c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 154049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-2 * pitch] = (FT_Byte)pix; 155049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 156049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project pix = fir[1] >> 8; 1579c745321260bb728ab1cd1c8fd5f075854b2ad49Behdad Esfahbod pix |= (FT_UInt)-(FT_Int)( pix >> 8 ); 158049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[-pitch] = (FT_Byte)pix; 159049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 160049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 161049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 162049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 163049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 164049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 165049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#ifdef USE_LEGACY 166049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 167049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* intra-pixel filter used by the legacy filter */ 168049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static void 169049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project _ft_lcd_filter_legacy( FT_Bitmap* bitmap, 170049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Render_Mode mode, 171049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Library library ) 172049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 173049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt width = (FT_UInt)bitmap->width; 174049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt height = (FT_UInt)bitmap->rows; 175049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Int pitch = bitmap->pitch; 176049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 177049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static const int filters[3][3] = 178049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 179049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 9/13, 65538 * 1/6, 65538 * 1/13 }, 180049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 3/13, 65538 * 4/6, 65538 * 3/13 }, 181049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 65538 * 1/13, 65538 * 1/6, 65538 * 9/13 } 182049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project }; 183049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 184049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( library ); 185049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 186049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 187049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* horizontal in-place intra-pixel filter */ 188049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project if ( mode == FT_RENDER_MODE_LCD && width >= 3 ) 189049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 190049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* line = bitmap->buffer; 191049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 192049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 193049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; height > 0; height--, line += pitch ) 194049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 195049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt xx; 196049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 197049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 198049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( xx = 0; xx < width; xx += 3 ) 199049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 200049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt r = 0; 201049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt g = 0; 202049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt b = 0; 203049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt p; 204049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 205049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 206049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx]; 207049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[0][0] * p; 208049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[0][1] * p; 209049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[0][2] * p; 210049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 211049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx + 1]; 212049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[1][0] * p; 213049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[1][1] * p; 214049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[1][2] * p; 215049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 216049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = line[xx + 2]; 217049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[2][0] * p; 218049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[2][1] * p; 219049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[2][2] * p; 220049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 221049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx] = (FT_Byte)( r / 65536 ); 222049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx + 1] = (FT_Byte)( g / 65536 ); 223049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project line[xx + 2] = (FT_Byte)( b / 65536 ); 224049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 225049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 226049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 227049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project else if ( mode == FT_RENDER_MODE_LCD_V && height >= 3 ) 228049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 229049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* column = bitmap->buffer; 230049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 231049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 232049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; width > 0; width--, column++ ) 233049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 234049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* col = column; 235049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Byte* col_end = col + height * pitch; 236049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 237049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 238049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project for ( ; col < col_end; col += 3 * pitch ) 239049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 240049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt r = 0; 241049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt g = 0; 242049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt b = 0; 243049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UInt p; 244049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 245049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 246049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[0]; 247049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[0][0] * p; 248049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[0][1] * p; 249049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[0][2] * p; 250049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 251049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[pitch]; 252049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[1][0] * p; 253049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[1][1] * p; 254049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[1][2] * p; 255049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 256049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project p = col[pitch * 2]; 257049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project r += filters[2][0] * p; 258049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project g += filters[2][1] * p; 259049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project b += filters[2][2] * p; 260049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 261049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[0] = (FT_Byte)( r / 65536 ); 262049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[pitch] = (FT_Byte)( g / 65536 ); 263049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project col[2 * pitch] = (FT_Byte)( b / 65536 ); 264049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 265049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 266049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 267049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 268049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 269049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif /* USE_LEGACY */ 270049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 271049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 2720a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project FT_EXPORT_DEF( FT_Error ) 273aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilterWeights( FT_Library library, 274aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich unsigned char *weights ) 275aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 276aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich if ( !library || !weights ) 277727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Invalid_Argument ); 278aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 279aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich ft_memcpy( library->lcd_weights, weights, 5 ); 280aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 281aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich return FT_Err_Ok; 282aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich } 283aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 284aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 285aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_EXPORT_DEF( FT_Error ) 286aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilter( FT_Library library, 287aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_LcdFilter filter ) 288049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 289049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static const FT_Byte light_filter[5] = 290aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 0x00, 0x55, 0x56, 0x55, 0x00 }; 291049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* the values here sum up to a value larger than 256, */ 292049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project /* providing a cheap gamma correction */ 293049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project static const FT_Byte default_filter[5] = 294049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 0x10, 0x40, 0x70, 0x40, 0x10 }; 295049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 296049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 297aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich if ( !library ) 298727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Invalid_Argument ); 299049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 300049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project switch ( filter ) 301049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 302049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_NONE: 303049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = NULL; 304049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 305049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 306049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 307049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_DEFAULT: 308049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#if defined( FT_FORCE_LEGACY_LCD_FILTER ) 309049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 310049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_legacy; 311049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 312049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 313049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#elif defined( FT_FORCE_LIGHT_LCD_FILTER ) 314049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3150a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, light_filter, 5 ); 316049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 317049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 318049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 319049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#else 320049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3210a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, default_filter, 5 ); 322049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 323049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 324049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 325049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif 326049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 327049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 328049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 329049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_LIGHT: 3300a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project ft_memcpy( library->lcd_weights, light_filter, 5 ); 331049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_fir; 332049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 2; 333049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 334049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 335049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#ifdef USE_LEGACY 336049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 337049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project case FT_LCD_FILTER_LEGACY: 338049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter_func = _ft_lcd_filter_legacy; 339049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_extra = 0; 340049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project break; 341049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 342049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif 343049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 344049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project default: 345727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Invalid_Argument ); 346049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 347049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 348049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project library->lcd_filter = filter; 349aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 350aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich return FT_Err_Ok; 351049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 352049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 353049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 354049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 3550a9d06e2b5cf75c3d6ba958026bfdf4745f576d6The Android Open Source Project FT_EXPORT_DEF( FT_Error ) 356aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_Library_SetLcdFilterWeights( FT_Library library, 357aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich unsigned char *weights ) 358aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich { 359aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_UNUSED( library ); 360aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_UNUSED( weights ); 361aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 362727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Unimplemented_Feature ); 363aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich } 364aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 365aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich 366aacb8e1368a883fcbc9fe64fd0e460cef9c9b20cNick Kralevich FT_EXPORT_DEF( FT_Error ) 367049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_Library_SetLcdFilter( FT_Library library, 368049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_LcdFilter filter ) 369049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project { 370049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( library ); 371049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project FT_UNUSED( filter ); 372049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 373727dee178a392d20eb050d0c446f2fcc29058fa1Victoria Lease return FT_THROW( Unimplemented_Feature ); 374049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project } 375049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 376049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ 377049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 378049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project 379049d6fea481044fcc000e7782e5bc7046fc70844The Android Open Source Project/* END */ 380