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4349 | Serge | 1 | /***************************************************************************/ |
2 | /* */ |
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3 | /* ftbitmap.c */ |
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4 | /* */ |
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5 | /* FreeType utility functions for bitmaps (body). */ |
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6 | /* */ |
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7 | /* Copyright 2004-2009, 2011, 2013 by */ |
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8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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9 | /* */ |
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10 | /* This file is part of the FreeType project, and may only be used, */ |
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11 | /* modified, and distributed under the terms of the FreeType project */ |
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12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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13 | /* this file you indicate that you have read the license and */ |
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14 | /* understand and accept it fully. */ |
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15 | /* */ |
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16 | /***************************************************************************/ |
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17 | |||
18 | |||
19 | #include |
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20 | #include FT_INTERNAL_DEBUG_H |
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21 | |||
22 | #include FT_BITMAP_H |
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23 | #include FT_IMAGE_H |
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24 | #include FT_INTERNAL_OBJECTS_H |
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25 | |||
26 | |||
27 | static |
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28 | const FT_Bitmap null_bitmap = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
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29 | |||
30 | |||
31 | /* documentation is in ftbitmap.h */ |
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32 | |||
33 | FT_EXPORT_DEF( void ) |
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34 | FT_Bitmap_New( FT_Bitmap *abitmap ) |
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35 | { |
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36 | *abitmap = null_bitmap; |
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37 | } |
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38 | |||
39 | |||
40 | /* documentation is in ftbitmap.h */ |
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41 | |||
42 | FT_EXPORT_DEF( FT_Error ) |
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43 | FT_Bitmap_Copy( FT_Library library, |
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44 | const FT_Bitmap *source, |
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45 | FT_Bitmap *target) |
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46 | { |
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47 | FT_Memory memory = library->memory; |
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48 | FT_Error error = FT_Err_Ok; |
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49 | FT_Int pitch = source->pitch; |
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50 | FT_ULong size; |
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51 | |||
52 | |||
53 | if ( source == target ) |
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54 | return FT_Err_Ok; |
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55 | |||
56 | if ( source->buffer == NULL ) |
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57 | { |
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58 | *target = *source; |
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59 | |||
60 | return FT_Err_Ok; |
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61 | } |
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62 | |||
63 | if ( pitch < 0 ) |
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64 | pitch = -pitch; |
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65 | size = (FT_ULong)( pitch * source->rows ); |
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66 | |||
67 | if ( target->buffer ) |
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68 | { |
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69 | FT_Int target_pitch = target->pitch; |
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70 | FT_ULong target_size; |
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71 | |||
72 | |||
73 | if ( target_pitch < 0 ) |
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74 | target_pitch = -target_pitch; |
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75 | target_size = (FT_ULong)( target_pitch * target->rows ); |
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76 | |||
77 | if ( target_size != size ) |
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78 | (void)FT_QREALLOC( target->buffer, target_size, size ); |
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79 | } |
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80 | else |
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81 | (void)FT_QALLOC( target->buffer, size ); |
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82 | |||
83 | if ( !error ) |
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84 | { |
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85 | unsigned char *p; |
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86 | |||
87 | |||
88 | p = target->buffer; |
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89 | *target = *source; |
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90 | target->buffer = p; |
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91 | |||
92 | FT_MEM_COPY( target->buffer, source->buffer, size ); |
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93 | } |
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94 | |||
95 | return error; |
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96 | } |
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97 | |||
98 | |||
99 | static FT_Error |
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100 | ft_bitmap_assure_buffer( FT_Memory memory, |
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101 | FT_Bitmap* bitmap, |
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102 | FT_UInt xpixels, |
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103 | FT_UInt ypixels ) |
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104 | { |
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105 | FT_Error error; |
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106 | int pitch; |
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107 | int new_pitch; |
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108 | FT_UInt bpp; |
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109 | FT_Int i, width, height; |
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110 | unsigned char* buffer = NULL; |
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111 | |||
112 | |||
113 | width = bitmap->width; |
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114 | height = bitmap->rows; |
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115 | pitch = bitmap->pitch; |
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116 | if ( pitch < 0 ) |
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117 | pitch = -pitch; |
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118 | |||
119 | switch ( bitmap->pixel_mode ) |
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120 | { |
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121 | case FT_PIXEL_MODE_MONO: |
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122 | bpp = 1; |
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123 | new_pitch = ( width + xpixels + 7 ) >> 3; |
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124 | break; |
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125 | case FT_PIXEL_MODE_GRAY2: |
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126 | bpp = 2; |
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127 | new_pitch = ( width + xpixels + 3 ) >> 2; |
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128 | break; |
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129 | case FT_PIXEL_MODE_GRAY4: |
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130 | bpp = 4; |
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131 | new_pitch = ( width + xpixels + 1 ) >> 1; |
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132 | break; |
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133 | case FT_PIXEL_MODE_GRAY: |
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134 | case FT_PIXEL_MODE_LCD: |
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135 | case FT_PIXEL_MODE_LCD_V: |
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136 | bpp = 8; |
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137 | new_pitch = ( width + xpixels ); |
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138 | break; |
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139 | default: |
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140 | return FT_THROW( Invalid_Glyph_Format ); |
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141 | } |
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142 | |||
143 | /* if no need to allocate memory */ |
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144 | if ( ypixels == 0 && new_pitch <= pitch ) |
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145 | { |
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146 | /* zero the padding */ |
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147 | FT_Int bit_width = pitch * 8; |
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148 | FT_Int bit_last = ( width + xpixels ) * bpp; |
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149 | |||
150 | |||
151 | if ( bit_last < bit_width ) |
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152 | { |
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153 | FT_Byte* line = bitmap->buffer + ( bit_last >> 3 ); |
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154 | FT_Byte* end = bitmap->buffer + pitch; |
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155 | FT_Int shift = bit_last & 7; |
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156 | FT_UInt mask = 0xFF00U >> shift; |
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157 | FT_Int count = height; |
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158 | |||
159 | |||
160 | for ( ; count > 0; count--, line += pitch, end += pitch ) |
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161 | { |
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162 | FT_Byte* write = line; |
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163 | |||
164 | |||
165 | if ( shift > 0 ) |
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166 | { |
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167 | write[0] = (FT_Byte)( write[0] & mask ); |
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168 | write++; |
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169 | } |
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170 | if ( write < end ) |
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171 | FT_MEM_ZERO( write, end-write ); |
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172 | } |
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173 | } |
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174 | |||
175 | return FT_Err_Ok; |
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176 | } |
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177 | |||
178 | if ( FT_QALLOC_MULT( buffer, new_pitch, bitmap->rows + ypixels ) ) |
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179 | return error; |
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180 | |||
181 | if ( bitmap->pitch > 0 ) |
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182 | { |
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183 | FT_Int len = ( width * bpp + 7 ) >> 3; |
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184 | |||
185 | |||
186 | for ( i = 0; i < bitmap->rows; i++ ) |
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187 | FT_MEM_COPY( buffer + new_pitch * ( ypixels + i ), |
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188 | bitmap->buffer + pitch * i, len ); |
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189 | } |
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190 | else |
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191 | { |
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192 | FT_Int len = ( width * bpp + 7 ) >> 3; |
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193 | |||
194 | |||
195 | for ( i = 0; i < bitmap->rows; i++ ) |
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196 | FT_MEM_COPY( buffer + new_pitch * i, |
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197 | bitmap->buffer + pitch * i, len ); |
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198 | } |
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199 | |||
200 | FT_FREE( bitmap->buffer ); |
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201 | bitmap->buffer = buffer; |
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202 | |||
203 | if ( bitmap->pitch < 0 ) |
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204 | new_pitch = -new_pitch; |
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205 | |||
206 | /* set pitch only, width and height are left untouched */ |
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207 | bitmap->pitch = new_pitch; |
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208 | |||
209 | return FT_Err_Ok; |
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210 | } |
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211 | |||
212 | |||
213 | /* documentation is in ftbitmap.h */ |
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214 | |||
215 | FT_EXPORT_DEF( FT_Error ) |
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216 | FT_Bitmap_Embolden( FT_Library library, |
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217 | FT_Bitmap* bitmap, |
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218 | FT_Pos xStrength, |
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219 | FT_Pos yStrength ) |
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220 | { |
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221 | FT_Error error; |
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222 | unsigned char* p; |
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223 | FT_Int i, x, y, pitch; |
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224 | FT_Int xstr, ystr; |
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225 | |||
226 | |||
227 | if ( !library ) |
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228 | return FT_THROW( Invalid_Library_Handle ); |
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229 | |||
230 | if ( !bitmap || !bitmap->buffer ) |
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231 | return FT_THROW( Invalid_Argument ); |
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232 | |||
233 | if ( ( ( FT_PIX_ROUND( xStrength ) >> 6 ) > FT_INT_MAX ) || |
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234 | ( ( FT_PIX_ROUND( yStrength ) >> 6 ) > FT_INT_MAX ) ) |
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235 | return FT_THROW( Invalid_Argument ); |
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236 | |||
237 | xstr = (FT_Int)FT_PIX_ROUND( xStrength ) >> 6; |
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238 | ystr = (FT_Int)FT_PIX_ROUND( yStrength ) >> 6; |
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239 | |||
240 | if ( xstr == 0 && ystr == 0 ) |
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241 | return FT_Err_Ok; |
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242 | else if ( xstr < 0 || ystr < 0 ) |
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243 | return FT_THROW( Invalid_Argument ); |
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244 | |||
245 | switch ( bitmap->pixel_mode ) |
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246 | { |
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247 | case FT_PIXEL_MODE_GRAY2: |
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248 | case FT_PIXEL_MODE_GRAY4: |
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249 | { |
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250 | FT_Bitmap tmp; |
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251 | FT_Int align; |
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252 | |||
253 | |||
254 | if ( bitmap->pixel_mode == FT_PIXEL_MODE_GRAY2 ) |
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255 | align = ( bitmap->width + xstr + 3 ) / 4; |
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256 | else |
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257 | align = ( bitmap->width + xstr + 1 ) / 2; |
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258 | |||
259 | FT_Bitmap_New( &tmp ); |
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260 | |||
261 | error = FT_Bitmap_Convert( library, bitmap, &tmp, align ); |
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262 | if ( error ) |
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263 | return error; |
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264 | |||
265 | FT_Bitmap_Done( library, bitmap ); |
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266 | *bitmap = tmp; |
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267 | } |
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268 | break; |
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269 | |||
270 | case FT_PIXEL_MODE_MONO: |
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271 | if ( xstr > 8 ) |
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272 | xstr = 8; |
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273 | break; |
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274 | |||
275 | case FT_PIXEL_MODE_LCD: |
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276 | xstr *= 3; |
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277 | break; |
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278 | |||
279 | case FT_PIXEL_MODE_LCD_V: |
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280 | ystr *= 3; |
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281 | break; |
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282 | |||
283 | case FT_PIXEL_MODE_BGRA: |
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284 | /* We don't embolden color glyphs. */ |
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285 | return FT_Err_Ok; |
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286 | } |
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287 | |||
288 | error = ft_bitmap_assure_buffer( library->memory, bitmap, xstr, ystr ); |
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289 | if ( error ) |
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290 | return error; |
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291 | |||
292 | pitch = bitmap->pitch; |
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293 | if ( pitch > 0 ) |
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294 | p = bitmap->buffer + pitch * ystr; |
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295 | else |
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296 | { |
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297 | pitch = -pitch; |
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298 | p = bitmap->buffer + pitch * ( bitmap->rows - 1 ); |
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299 | } |
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300 | |||
301 | /* for each row */ |
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302 | for ( y = 0; y < bitmap->rows ; y++ ) |
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303 | { |
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304 | /* |
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305 | * Horizontally: |
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306 | * |
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307 | * From the last pixel on, make each pixel or'ed with the |
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308 | * `xstr' pixels before it. |
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309 | */ |
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310 | for ( x = pitch - 1; x >= 0; x-- ) |
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311 | { |
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312 | unsigned char tmp; |
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313 | |||
314 | |||
315 | tmp = p[x]; |
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316 | for ( i = 1; i <= xstr; i++ ) |
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317 | { |
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318 | if ( bitmap->pixel_mode == FT_PIXEL_MODE_MONO ) |
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319 | { |
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320 | p[x] |= tmp >> i; |
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321 | |||
322 | /* the maximum value of 8 for `xstr' comes from here */ |
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323 | if ( x > 0 ) |
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324 | p[x] |= p[x - 1] << ( 8 - i ); |
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325 | |||
326 | #if 0 |
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327 | if ( p[x] == 0xff ) |
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328 | break; |
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329 | #endif |
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330 | } |
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331 | else |
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332 | { |
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333 | if ( x - i >= 0 ) |
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334 | { |
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335 | if ( p[x] + p[x - i] > bitmap->num_grays - 1 ) |
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336 | { |
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337 | p[x] = (unsigned char)(bitmap->num_grays - 1); |
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338 | break; |
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339 | } |
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340 | else |
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341 | { |
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342 | p[x] = (unsigned char)(p[x] + p[x-i]); |
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343 | if ( p[x] == bitmap->num_grays - 1 ) |
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344 | break; |
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345 | } |
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346 | } |
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347 | else |
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348 | break; |
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349 | } |
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350 | } |
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351 | } |
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352 | |||
353 | /* |
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354 | * Vertically: |
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355 | * |
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356 | * Make the above `ystr' rows or'ed with it. |
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357 | */ |
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358 | for ( x = 1; x <= ystr; x++ ) |
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359 | { |
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360 | unsigned char* q; |
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361 | |||
362 | |||
363 | q = p - bitmap->pitch * x; |
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364 | for ( i = 0; i < pitch; i++ ) |
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365 | q[i] |= p[i]; |
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366 | } |
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367 | |||
368 | p += bitmap->pitch; |
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369 | } |
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370 | |||
371 | bitmap->width += xstr; |
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372 | bitmap->rows += ystr; |
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373 | |||
374 | return FT_Err_Ok; |
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375 | } |
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376 | |||
377 | |||
378 | FT_Byte |
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379 | ft_gray_for_premultiplied_srgb_bgra( const FT_Byte* bgra ) |
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380 | { |
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381 | FT_Long a = bgra[3]; |
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382 | FT_Long b = bgra[0]; |
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383 | FT_Long g = bgra[1]; |
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384 | FT_Long r = bgra[2]; |
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385 | FT_Long l; |
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386 | |||
387 | |||
388 | /* |
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389 | * Luminosity for sRGB is defined using ~0.2126,0.7152,0.0722 |
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390 | * coefficients for RGB channels *on the linear colors*. |
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391 | * A gamma of 2.2 is fair to assume. And then, we need to |
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392 | * undo the premultiplication too. |
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393 | * |
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394 | * http://accessibility.kde.org/hsl-adjusted.php |
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395 | * |
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396 | * We do the computation with integers only. |
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397 | */ |
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398 | |||
399 | /* Undo premultification, get the number in a 16.16 form. */ |
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400 | b = FT_MulDiv( b, 65536, a ); |
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401 | g = FT_MulDiv( g, 65536, a ); |
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402 | r = FT_MulDiv( r, 65536, a ); |
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403 | a = a * 256; |
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404 | |||
405 | /* Apply gamma of 2.0 instead of 2.2. */ |
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406 | b = FT_MulFix( b, b ); |
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407 | g = FT_MulFix( g, g ); |
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408 | r = FT_MulFix( r, r ); |
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409 | |||
410 | /* Apply coefficients. */ |
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411 | b = FT_MulFix( b, 4731 /* 0.0722 * 65536 */ ); |
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412 | g = FT_MulFix( g, 46871 /* 0.7152 * 65536 */ ); |
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413 | r = FT_MulFix( r, 13933 /* 0.2126 * 65536 */ ); |
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414 | |||
415 | l = r + g + b; |
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416 | |||
417 | /* |
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418 | * Final transparency can be determined this way: |
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419 | * |
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420 | * - If alpha is zero, we want 0. |
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421 | * - If alpha is zero and luminosity is zero, we want 255. |
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422 | * - If alpha is zero and luminosity is one, we want 0. |
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423 | * |
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424 | * So the formula is a * (1 - l). |
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425 | */ |
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426 | |||
427 | return (FT_Byte)( FT_MulFix( 65535 - l, a ) >> 8 ); |
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428 | } |
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429 | |||
430 | |||
431 | /* documentation is in ftbitmap.h */ |
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432 | |||
433 | FT_EXPORT_DEF( FT_Error ) |
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434 | FT_Bitmap_Convert( FT_Library library, |
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435 | const FT_Bitmap *source, |
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436 | FT_Bitmap *target, |
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437 | FT_Int alignment ) |
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438 | { |
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439 | FT_Error error = FT_Err_Ok; |
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440 | FT_Memory memory; |
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441 | |||
442 | |||
443 | if ( !library ) |
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444 | return FT_THROW( Invalid_Library_Handle ); |
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445 | |||
446 | memory = library->memory; |
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447 | |||
448 | switch ( source->pixel_mode ) |
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449 | { |
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450 | case FT_PIXEL_MODE_MONO: |
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451 | case FT_PIXEL_MODE_GRAY: |
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452 | case FT_PIXEL_MODE_GRAY2: |
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453 | case FT_PIXEL_MODE_GRAY4: |
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454 | case FT_PIXEL_MODE_LCD: |
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455 | case FT_PIXEL_MODE_LCD_V: |
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456 | case FT_PIXEL_MODE_BGRA: |
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457 | { |
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458 | FT_Int pad; |
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459 | FT_Long old_size; |
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460 | |||
461 | |||
462 | old_size = target->rows * target->pitch; |
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463 | if ( old_size < 0 ) |
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464 | old_size = -old_size; |
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465 | |||
466 | target->pixel_mode = FT_PIXEL_MODE_GRAY; |
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467 | target->rows = source->rows; |
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468 | target->width = source->width; |
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469 | |||
470 | pad = 0; |
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471 | if ( alignment > 0 ) |
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472 | { |
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473 | pad = source->width % alignment; |
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474 | if ( pad != 0 ) |
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475 | pad = alignment - pad; |
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476 | } |
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477 | |||
478 | target->pitch = source->width + pad; |
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479 | |||
480 | if ( target->pitch > 0 && |
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481 | (FT_ULong)target->rows > FT_ULONG_MAX / target->pitch ) |
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482 | return FT_THROW( Invalid_Argument ); |
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483 | |||
484 | if ( target->rows * target->pitch > old_size && |
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485 | FT_QREALLOC( target->buffer, |
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486 | old_size, target->rows * target->pitch ) ) |
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487 | return error; |
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488 | } |
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489 | break; |
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490 | |||
491 | default: |
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492 | error = FT_THROW( Invalid_Argument ); |
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493 | } |
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494 | |||
495 | switch ( source->pixel_mode ) |
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496 | { |
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497 | case FT_PIXEL_MODE_MONO: |
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498 | { |
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499 | FT_Byte* s = source->buffer; |
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500 | FT_Byte* t = target->buffer; |
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501 | FT_Int i; |
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502 | |||
503 | |||
504 | target->num_grays = 2; |
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505 | |||
506 | for ( i = source->rows; i > 0; i-- ) |
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507 | { |
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508 | FT_Byte* ss = s; |
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509 | FT_Byte* tt = t; |
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510 | FT_Int j; |
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511 | |||
512 | |||
513 | /* get the full bytes */ |
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514 | for ( j = source->width >> 3; j > 0; j-- ) |
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515 | { |
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516 | FT_Int val = ss[0]; /* avoid a byte->int cast on each line */ |
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517 | |||
518 | |||
519 | tt[0] = (FT_Byte)( ( val & 0x80 ) >> 7 ); |
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520 | tt[1] = (FT_Byte)( ( val & 0x40 ) >> 6 ); |
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521 | tt[2] = (FT_Byte)( ( val & 0x20 ) >> 5 ); |
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522 | tt[3] = (FT_Byte)( ( val & 0x10 ) >> 4 ); |
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523 | tt[4] = (FT_Byte)( ( val & 0x08 ) >> 3 ); |
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524 | tt[5] = (FT_Byte)( ( val & 0x04 ) >> 2 ); |
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525 | tt[6] = (FT_Byte)( ( val & 0x02 ) >> 1 ); |
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526 | tt[7] = (FT_Byte)( val & 0x01 ); |
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527 | |||
528 | tt += 8; |
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529 | ss += 1; |
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530 | } |
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531 | |||
532 | /* get remaining pixels (if any) */ |
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533 | j = source->width & 7; |
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534 | if ( j > 0 ) |
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535 | { |
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536 | FT_Int val = *ss; |
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537 | |||
538 | |||
539 | for ( ; j > 0; j-- ) |
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540 | { |
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541 | tt[0] = (FT_Byte)( ( val & 0x80 ) >> 7); |
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542 | val <<= 1; |
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543 | tt += 1; |
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544 | } |
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545 | } |
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546 | |||
547 | s += source->pitch; |
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548 | t += target->pitch; |
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549 | } |
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550 | } |
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551 | break; |
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552 | |||
553 | |||
554 | case FT_PIXEL_MODE_GRAY: |
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555 | case FT_PIXEL_MODE_LCD: |
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556 | case FT_PIXEL_MODE_LCD_V: |
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557 | { |
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558 | FT_Int width = source->width; |
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559 | FT_Byte* s = source->buffer; |
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560 | FT_Byte* t = target->buffer; |
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561 | FT_Int s_pitch = source->pitch; |
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562 | FT_Int t_pitch = target->pitch; |
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563 | FT_Int i; |
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564 | |||
565 | |||
566 | target->num_grays = 256; |
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567 | |||
568 | for ( i = source->rows; i > 0; i-- ) |
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569 | { |
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570 | FT_ARRAY_COPY( t, s, width ); |
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571 | |||
572 | s += s_pitch; |
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573 | t += t_pitch; |
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574 | } |
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575 | } |
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576 | break; |
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577 | |||
578 | |||
579 | case FT_PIXEL_MODE_GRAY2: |
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580 | { |
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581 | FT_Byte* s = source->buffer; |
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582 | FT_Byte* t = target->buffer; |
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583 | FT_Int i; |
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584 | |||
585 | |||
586 | target->num_grays = 4; |
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587 | |||
588 | for ( i = source->rows; i > 0; i-- ) |
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589 | { |
||
590 | FT_Byte* ss = s; |
||
591 | FT_Byte* tt = t; |
||
592 | FT_Int j; |
||
593 | |||
594 | |||
595 | /* get the full bytes */ |
||
596 | for ( j = source->width >> 2; j > 0; j-- ) |
||
597 | { |
||
598 | FT_Int val = ss[0]; |
||
599 | |||
600 | |||
601 | tt[0] = (FT_Byte)( ( val & 0xC0 ) >> 6 ); |
||
602 | tt[1] = (FT_Byte)( ( val & 0x30 ) >> 4 ); |
||
603 | tt[2] = (FT_Byte)( ( val & 0x0C ) >> 2 ); |
||
604 | tt[3] = (FT_Byte)( ( val & 0x03 ) ); |
||
605 | |||
606 | ss += 1; |
||
607 | tt += 4; |
||
608 | } |
||
609 | |||
610 | j = source->width & 3; |
||
611 | if ( j > 0 ) |
||
612 | { |
||
613 | FT_Int val = ss[0]; |
||
614 | |||
615 | |||
616 | for ( ; j > 0; j-- ) |
||
617 | { |
||
618 | tt[0] = (FT_Byte)( ( val & 0xC0 ) >> 6 ); |
||
619 | val <<= 2; |
||
620 | tt += 1; |
||
621 | } |
||
622 | } |
||
623 | |||
624 | s += source->pitch; |
||
625 | t += target->pitch; |
||
626 | } |
||
627 | } |
||
628 | break; |
||
629 | |||
630 | |||
631 | case FT_PIXEL_MODE_GRAY4: |
||
632 | { |
||
633 | FT_Byte* s = source->buffer; |
||
634 | FT_Byte* t = target->buffer; |
||
635 | FT_Int i; |
||
636 | |||
637 | |||
638 | target->num_grays = 16; |
||
639 | |||
640 | for ( i = source->rows; i > 0; i-- ) |
||
641 | { |
||
642 | FT_Byte* ss = s; |
||
643 | FT_Byte* tt = t; |
||
644 | FT_Int j; |
||
645 | |||
646 | |||
647 | /* get the full bytes */ |
||
648 | for ( j = source->width >> 1; j > 0; j-- ) |
||
649 | { |
||
650 | FT_Int val = ss[0]; |
||
651 | |||
652 | |||
653 | tt[0] = (FT_Byte)( ( val & 0xF0 ) >> 4 ); |
||
654 | tt[1] = (FT_Byte)( ( val & 0x0F ) ); |
||
655 | |||
656 | ss += 1; |
||
657 | tt += 2; |
||
658 | } |
||
659 | |||
660 | if ( source->width & 1 ) |
||
661 | tt[0] = (FT_Byte)( ( ss[0] & 0xF0 ) >> 4 ); |
||
662 | |||
663 | s += source->pitch; |
||
664 | t += target->pitch; |
||
665 | } |
||
666 | } |
||
667 | break; |
||
668 | |||
669 | case FT_PIXEL_MODE_BGRA: |
||
670 | { |
||
671 | FT_Byte* s = source->buffer; |
||
672 | FT_Byte* t = target->buffer; |
||
673 | FT_Int s_pitch = source->pitch; |
||
674 | FT_Int t_pitch = target->pitch; |
||
675 | FT_Int i; |
||
676 | |||
677 | |||
678 | target->num_grays = 256; |
||
679 | |||
680 | for ( i = source->rows; i > 0; i-- ) |
||
681 | { |
||
682 | FT_Byte* ss = s; |
||
683 | FT_Byte* tt = t; |
||
684 | FT_Int j; |
||
685 | |||
686 | |||
687 | for ( j = source->width; j > 0; j-- ) |
||
688 | { |
||
689 | tt[0] = ft_gray_for_premultiplied_srgb_bgra( ss ); |
||
690 | |||
691 | ss += 4; |
||
692 | tt += 1; |
||
693 | } |
||
694 | |||
695 | s += s_pitch; |
||
696 | t += t_pitch; |
||
697 | } |
||
698 | } |
||
699 | break; |
||
700 | |||
701 | default: |
||
702 | ; |
||
703 | } |
||
704 | |||
705 | return error; |
||
706 | } |
||
707 | |||
708 | |||
709 | /* documentation is in ftbitmap.h */ |
||
710 | |||
711 | FT_EXPORT_DEF( FT_Error ) |
||
712 | FT_GlyphSlot_Own_Bitmap( FT_GlyphSlot slot ) |
||
713 | { |
||
714 | if ( slot && slot->format == FT_GLYPH_FORMAT_BITMAP && |
||
715 | !( slot->internal->flags & FT_GLYPH_OWN_BITMAP ) ) |
||
716 | { |
||
717 | FT_Bitmap bitmap; |
||
718 | FT_Error error; |
||
719 | |||
720 | |||
721 | FT_Bitmap_New( &bitmap ); |
||
722 | error = FT_Bitmap_Copy( slot->library, &slot->bitmap, &bitmap ); |
||
723 | if ( error ) |
||
724 | return error; |
||
725 | |||
726 | slot->bitmap = bitmap; |
||
727 | slot->internal->flags |= FT_GLYPH_OWN_BITMAP; |
||
728 | } |
||
729 | |||
730 | return FT_Err_Ok; |
||
731 | } |
||
732 | |||
733 | |||
734 | /* documentation is in ftbitmap.h */ |
||
735 | |||
736 | FT_EXPORT_DEF( FT_Error ) |
||
737 | FT_Bitmap_Done( FT_Library library, |
||
738 | FT_Bitmap *bitmap ) |
||
739 | { |
||
740 | FT_Memory memory; |
||
741 | |||
742 | |||
743 | if ( !library ) |
||
744 | return FT_THROW( Invalid_Library_Handle ); |
||
745 | |||
746 | if ( !bitmap ) |
||
747 | return FT_THROW( Invalid_Argument ); |
||
748 | |||
749 | memory = library->memory; |
||
750 | |||
751 | FT_FREE( bitmap->buffer ); |
||
752 | *bitmap = null_bitmap; |
||
753 | |||
754 | return FT_Err_Ok; |
||
755 | } |
||
756 | |||
757 | |||
758 | /* END */=><=>=><=>>>=>><>=>>>>>>>>>=>>>> |