Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* pfrsbit.c */ |
| 4 | /* */ |
| 5 | /* FreeType PFR bitmap loader (body). */ |
| 6 | /* */ |
Werner Lemberg | 5edafed | 2006-02-22 08:23:35 +0000 | [diff] [blame^] | 7 | /* Copyright 2002, 2003, 2006 by */ |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
| 9 | /* */ |
| 10 | /* This file is part of the FreeType project, and may only be used, */ |
| 11 | /* modified, and distributed under the terms of the FreeType project */ |
| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 13 | /* this file you indicate that you have read the license and */ |
| 14 | /* understand and accept it fully. */ |
| 15 | /* */ |
| 16 | /***************************************************************************/ |
| 17 | |
| 18 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 19 | #include "pfrsbit.h" |
| 20 | #include "pfrload.h" |
| 21 | #include FT_INTERNAL_DEBUG_H |
| 22 | #include FT_INTERNAL_STREAM_H |
| 23 | |
| 24 | #include "pfrerror.h" |
| 25 | |
| 26 | #undef FT_COMPONENT |
| 27 | #define FT_COMPONENT trace_pfr |
| 28 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 29 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 30 | /*************************************************************************/ |
| 31 | /*************************************************************************/ |
| 32 | /***** *****/ |
| 33 | /***** PFR BIT WRITER *****/ |
| 34 | /***** *****/ |
| 35 | /*************************************************************************/ |
| 36 | /*************************************************************************/ |
| 37 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 38 | typedef struct PFR_BitWriter_ |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 39 | { |
| 40 | FT_Byte* line; /* current line start */ |
| 41 | FT_Int pitch; /* line size in bytes */ |
| 42 | FT_Int width; /* width in pixels/bits */ |
| 43 | FT_Int rows; /* number of remaining rows to scan */ |
| 44 | FT_Int total; /* total number of bits to draw */ |
| 45 | |
| 46 | } PFR_BitWriterRec, *PFR_BitWriter; |
| 47 | |
| 48 | |
| 49 | static void |
| 50 | pfr_bitwriter_init( PFR_BitWriter writer, |
| 51 | FT_Bitmap* target, |
Werner Lemberg | 0240d29 | 2003-06-09 15:54:18 +0000 | [diff] [blame] | 52 | FT_Bool decreasing ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 53 | { |
| 54 | writer->line = target->buffer; |
| 55 | writer->pitch = target->pitch; |
| 56 | writer->width = target->width; |
| 57 | writer->rows = target->rows; |
| 58 | writer->total = writer->width * writer->rows; |
| 59 | |
| 60 | if ( !decreasing ) |
| 61 | { |
| 62 | writer->line += writer->pitch * ( target->rows-1 ); |
| 63 | writer->pitch = -writer->pitch; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | |
| 68 | static void |
| 69 | pfr_bitwriter_decode_bytes( PFR_BitWriter writer, |
| 70 | FT_Byte* p, |
| 71 | FT_Byte* limit ) |
| 72 | { |
| 73 | FT_Int n, reload; |
| 74 | FT_Int left = writer->width; |
| 75 | FT_Byte* cur = writer->line; |
| 76 | FT_UInt mask = 0x80; |
| 77 | FT_UInt val = 0; |
| 78 | FT_UInt c = 0; |
| 79 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 80 | |
| 81 | n = (FT_Int)( limit - p ) * 8; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 82 | if ( n > writer->total ) |
| 83 | n = writer->total; |
| 84 | |
| 85 | reload = n & 7; |
| 86 | |
| 87 | for ( ; n > 0; n-- ) |
| 88 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 89 | if ( ( n & 7 ) == reload ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 90 | val = *p++; |
| 91 | |
| 92 | if ( val & 0x80 ) |
| 93 | c |= mask; |
| 94 | |
| 95 | val <<= 1; |
| 96 | mask >>= 1; |
| 97 | |
| 98 | if ( --left <= 0 ) |
| 99 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 100 | cur[0] = (FT_Byte)c; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 101 | left = writer->width; |
| 102 | mask = 0x80; |
| 103 | |
| 104 | writer->line += writer->pitch; |
| 105 | cur = writer->line; |
| 106 | c = 0; |
| 107 | } |
| 108 | else if ( mask == 0 ) |
| 109 | { |
David Turner | 4bdf435 | 2003-01-30 23:24:18 +0000 | [diff] [blame] | 110 | cur[0] = (FT_Byte)c; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 111 | mask = 0x80; |
| 112 | c = 0; |
| 113 | cur ++; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | if ( mask != 0x80 ) |
Werner Lemberg | 2e57343 | 2003-04-23 14:14:06 +0000 | [diff] [blame] | 118 | cur[0] = (FT_Byte)c; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | |
| 122 | static void |
| 123 | pfr_bitwriter_decode_rle1( PFR_BitWriter writer, |
| 124 | FT_Byte* p, |
| 125 | FT_Byte* limit ) |
| 126 | { |
| 127 | FT_Int n, phase, count, counts[2], reload; |
| 128 | FT_Int left = writer->width; |
| 129 | FT_Byte* cur = writer->line; |
| 130 | FT_UInt mask = 0x80; |
| 131 | FT_UInt c = 0; |
| 132 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 133 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 134 | n = writer->total; |
| 135 | |
| 136 | phase = 1; |
| 137 | counts[0] = 0; |
| 138 | counts[1] = 0; |
| 139 | count = 0; |
| 140 | reload = 1; |
| 141 | |
| 142 | for ( ; n > 0; n-- ) |
| 143 | { |
| 144 | if ( reload ) |
| 145 | { |
| 146 | do |
| 147 | { |
| 148 | if ( phase ) |
| 149 | { |
| 150 | FT_Int v; |
| 151 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 152 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 153 | if ( p >= limit ) |
| 154 | break; |
| 155 | |
| 156 | v = *p++; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 157 | counts[0] = v >> 4; |
| 158 | counts[1] = v & 15; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 159 | phase = 0; |
| 160 | count = counts[0]; |
| 161 | } |
| 162 | else |
| 163 | { |
| 164 | phase = 1; |
| 165 | count = counts[1]; |
| 166 | } |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 167 | |
| 168 | } while ( count == 0 ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | if ( phase ) |
| 172 | c |= mask; |
| 173 | |
| 174 | mask >>= 1; |
| 175 | |
| 176 | if ( --left <= 0 ) |
| 177 | { |
| 178 | cur[0] = (FT_Byte) c; |
| 179 | left = writer->width; |
| 180 | mask = 0x80; |
| 181 | |
| 182 | writer->line += writer->pitch; |
| 183 | cur = writer->line; |
| 184 | c = 0; |
| 185 | } |
| 186 | else if ( mask == 0 ) |
| 187 | { |
Werner Lemberg | 2e57343 | 2003-04-23 14:14:06 +0000 | [diff] [blame] | 188 | cur[0] = (FT_Byte)c; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 189 | mask = 0x80; |
| 190 | c = 0; |
| 191 | cur ++; |
| 192 | } |
| 193 | |
| 194 | reload = ( --count <= 0 ); |
| 195 | } |
| 196 | |
| 197 | if ( mask != 0x80 ) |
| 198 | cur[0] = (FT_Byte) c; |
| 199 | } |
| 200 | |
| 201 | |
| 202 | static void |
| 203 | pfr_bitwriter_decode_rle2( PFR_BitWriter writer, |
| 204 | FT_Byte* p, |
| 205 | FT_Byte* limit ) |
| 206 | { |
| 207 | FT_Int n, phase, count, reload; |
| 208 | FT_Int left = writer->width; |
| 209 | FT_Byte* cur = writer->line; |
| 210 | FT_UInt mask = 0x80; |
| 211 | FT_UInt c = 0; |
| 212 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 213 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 214 | n = writer->total; |
| 215 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 216 | phase = 1; |
| 217 | count = 0; |
| 218 | reload = 1; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 219 | |
| 220 | for ( ; n > 0; n-- ) |
| 221 | { |
| 222 | if ( reload ) |
| 223 | { |
| 224 | do |
| 225 | { |
| 226 | if ( p >= limit ) |
| 227 | break; |
| 228 | |
| 229 | count = *p++; |
| 230 | phase = phase ^ 1; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 231 | |
| 232 | } while ( count == 0 ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | if ( phase ) |
| 236 | c |= mask; |
| 237 | |
| 238 | mask >>= 1; |
| 239 | |
| 240 | if ( --left <= 0 ) |
| 241 | { |
| 242 | cur[0] = (FT_Byte) c; |
| 243 | c = 0; |
| 244 | mask = 0x80; |
| 245 | left = writer->width; |
| 246 | |
| 247 | writer->line += writer->pitch; |
| 248 | cur = writer->line; |
| 249 | } |
| 250 | else if ( mask == 0 ) |
| 251 | { |
Werner Lemberg | 2e57343 | 2003-04-23 14:14:06 +0000 | [diff] [blame] | 252 | cur[0] = (FT_Byte)c; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 253 | c = 0; |
| 254 | mask = 0x80; |
| 255 | cur ++; |
| 256 | } |
| 257 | |
| 258 | reload = ( --count <= 0 ); |
| 259 | } |
| 260 | |
| 261 | if ( mask != 0x80 ) |
| 262 | cur[0] = (FT_Byte) c; |
| 263 | } |
| 264 | |
| 265 | |
| 266 | /*************************************************************************/ |
| 267 | /*************************************************************************/ |
| 268 | /***** *****/ |
| 269 | /***** BITMAP DATA DECODING *****/ |
| 270 | /***** *****/ |
| 271 | /*************************************************************************/ |
| 272 | /*************************************************************************/ |
| 273 | |
| 274 | static void |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 275 | pfr_lookup_bitmap_data( FT_Byte* base, |
| 276 | FT_Byte* limit, |
Werner Lemberg | 0240d29 | 2003-06-09 15:54:18 +0000 | [diff] [blame] | 277 | FT_UInt count, |
| 278 | FT_UInt flags, |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 279 | FT_UInt char_code, |
| 280 | FT_ULong* found_offset, |
| 281 | FT_ULong* found_size ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 282 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 283 | FT_UInt left, right, char_len; |
David Turner | 4bdf435 | 2003-01-30 23:24:18 +0000 | [diff] [blame] | 284 | FT_Bool two = FT_BOOL( flags & 1 ); |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 285 | FT_Byte* buff; |
| 286 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 287 | |
| 288 | char_len = 4; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 289 | if ( two ) char_len += 1; |
| 290 | if ( flags & 2 ) char_len += 1; |
| 291 | if ( flags & 4 ) char_len += 1; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 292 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 293 | left = 0; |
| 294 | right = count; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 295 | |
| 296 | while ( left < right ) |
| 297 | { |
| 298 | FT_UInt middle, code; |
| 299 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 300 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 301 | middle = ( left + right ) >> 1; |
| 302 | buff = base + middle * char_len; |
| 303 | |
| 304 | /* check that we are not outside of the table -- */ |
| 305 | /* this is possible with broken fonts... */ |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 306 | if ( buff + char_len > limit ) |
| 307 | goto Fail; |
| 308 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 309 | if ( two ) |
| 310 | code = PFR_NEXT_USHORT( buff ); |
| 311 | else |
| 312 | code = PFR_NEXT_BYTE( buff ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 313 | |
| 314 | if ( code == char_code ) |
| 315 | goto Found_It; |
| 316 | |
| 317 | if ( code < char_code ) |
| 318 | left = middle; |
| 319 | else |
| 320 | right = middle; |
| 321 | } |
| 322 | |
| 323 | Fail: |
| 324 | /* Not found */ |
| 325 | *found_size = 0; |
| 326 | *found_offset = 0; |
| 327 | return; |
| 328 | |
| 329 | Found_It: |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 330 | if ( flags & 2 ) |
| 331 | *found_size = PFR_NEXT_USHORT( buff ); |
| 332 | else |
| 333 | *found_size = PFR_NEXT_BYTE( buff ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 334 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 335 | if ( flags & 4 ) |
| 336 | *found_offset = PFR_NEXT_ULONG( buff ); |
| 337 | else |
| 338 | *found_offset = PFR_NEXT_USHORT( buff ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 342 | /* load bitmap metrics. "*padvance" must be set to the default value */ |
| 343 | /* before calling this function... */ |
| 344 | /* */ |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 345 | static FT_Error |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 346 | pfr_load_bitmap_metrics( FT_Byte** pdata, |
| 347 | FT_Byte* limit, |
| 348 | FT_Long scaled_advance, |
| 349 | FT_Long *axpos, |
| 350 | FT_Long *aypos, |
| 351 | FT_UInt *axsize, |
| 352 | FT_UInt *aysize, |
| 353 | FT_Long *aadvance, |
| 354 | FT_UInt *aformat ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 355 | { |
| 356 | FT_Error error = 0; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 357 | FT_Byte flags; |
| 358 | FT_Char b; |
| 359 | FT_Byte* p = *pdata; |
| 360 | FT_Long xpos, ypos, advance; |
| 361 | FT_UInt xsize, ysize; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 362 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 363 | |
| 364 | PFR_CHECK( 1 ); |
| 365 | flags = PFR_NEXT_BYTE( p ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 366 | |
| 367 | xpos = 0; |
| 368 | ypos = 0; |
| 369 | xsize = 0; |
| 370 | ysize = 0; |
| 371 | advance = 0; |
| 372 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 373 | switch ( flags & 3 ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 374 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 375 | case 0: |
| 376 | PFR_CHECK( 1 ); |
| 377 | b = PFR_NEXT_INT8( p ); |
| 378 | xpos = b >> 4; |
| 379 | ypos = ( (FT_Char)( b << 4 ) ) >> 4; |
| 380 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 381 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 382 | case 1: |
| 383 | PFR_CHECK( 2 ); |
| 384 | xpos = PFR_NEXT_INT8( p ); |
| 385 | ypos = PFR_NEXT_INT8( p ); |
| 386 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 387 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 388 | case 2: |
| 389 | PFR_CHECK( 4 ); |
| 390 | xpos = PFR_NEXT_SHORT( p ); |
| 391 | ypos = PFR_NEXT_SHORT( p ); |
| 392 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 393 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 394 | case 3: |
| 395 | PFR_CHECK( 6 ); |
| 396 | xpos = PFR_NEXT_LONG( p ); |
| 397 | ypos = PFR_NEXT_LONG( p ); |
| 398 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 399 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 400 | default: |
| 401 | ; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | flags >>= 2; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 405 | switch ( flags & 3 ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 406 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 407 | case 0: |
| 408 | /* blank image */ |
| 409 | xsize = 0; |
| 410 | ysize = 0; |
| 411 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 412 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 413 | case 1: |
| 414 | PFR_CHECK( 1 ); |
| 415 | b = PFR_NEXT_BYTE( p ); |
| 416 | xsize = ( b >> 4 ) & 0xF; |
| 417 | ysize = b & 0xF; |
| 418 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 419 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 420 | case 2: |
| 421 | PFR_CHECK( 2 ); |
| 422 | xsize = PFR_NEXT_BYTE( p ); |
| 423 | ysize = PFR_NEXT_BYTE( p ); |
| 424 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 425 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 426 | case 3: |
| 427 | PFR_CHECK( 4 ); |
| 428 | xsize = PFR_NEXT_USHORT( p ); |
| 429 | ysize = PFR_NEXT_USHORT( p ); |
| 430 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 431 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 432 | default: |
| 433 | ; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | flags >>= 2; |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 437 | switch ( flags & 3 ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 438 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 439 | case 0: |
| 440 | advance = scaled_advance; |
| 441 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 442 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 443 | case 1: |
| 444 | PFR_CHECK( 1 ); |
| 445 | advance = PFR_NEXT_INT8( p ) << 8; |
| 446 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 447 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 448 | case 2: |
| 449 | PFR_CHECK( 2 ); |
| 450 | advance = PFR_NEXT_SHORT( p ); |
| 451 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 452 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 453 | case 3: |
| 454 | PFR_CHECK( 3 ); |
| 455 | advance = PFR_NEXT_LONG( p ); |
| 456 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 457 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 458 | default: |
| 459 | ; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | *axpos = xpos; |
| 463 | *aypos = ypos; |
| 464 | *axsize = xsize; |
| 465 | *aysize = ysize; |
| 466 | *aadvance = advance; |
| 467 | *aformat = flags >> 2; |
| 468 | *pdata = p; |
| 469 | |
| 470 | Exit: |
| 471 | return error; |
| 472 | |
| 473 | Too_Short: |
| 474 | error = PFR_Err_Invalid_Table; |
| 475 | FT_ERROR(( "pfr_load_bitmap_metrics: invalid glyph data\n" )); |
| 476 | goto Exit; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | static FT_Error |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 481 | pfr_load_bitmap_bits( FT_Byte* p, |
| 482 | FT_Byte* limit, |
| 483 | FT_UInt format, |
Werner Lemberg | 0240d29 | 2003-06-09 15:54:18 +0000 | [diff] [blame] | 484 | FT_Bool decreasing, |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 485 | FT_Bitmap* target ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 486 | { |
| 487 | FT_Error error = 0; |
| 488 | PFR_BitWriterRec writer; |
| 489 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 490 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 491 | if ( target->rows > 0 && target->width > 0 ) |
| 492 | { |
| 493 | pfr_bitwriter_init( &writer, target, decreasing ); |
| 494 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 495 | switch ( format ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 496 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 497 | case 0: /* packed bits */ |
| 498 | pfr_bitwriter_decode_bytes( &writer, p, limit ); |
| 499 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 500 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 501 | case 1: /* RLE1 */ |
| 502 | pfr_bitwriter_decode_rle1( &writer, p, limit ); |
| 503 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 504 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 505 | case 2: /* RLE2 */ |
| 506 | pfr_bitwriter_decode_rle2( &writer, p, limit ); |
| 507 | break; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 508 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 509 | default: |
| 510 | FT_ERROR(( "pfr_read_bitmap_data: invalid image type\n" )); |
Werner Lemberg | 779afe4 | 2003-06-22 15:33:53 +0000 | [diff] [blame] | 511 | error = PFR_Err_Invalid_File_Format; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 512 | } |
| 513 | } |
| 514 | |
| 515 | return error; |
| 516 | } |
| 517 | |
| 518 | |
| 519 | /*************************************************************************/ |
| 520 | /*************************************************************************/ |
| 521 | /***** *****/ |
| 522 | /***** BITMAP LOADING *****/ |
| 523 | /***** *****/ |
| 524 | /*************************************************************************/ |
| 525 | /*************************************************************************/ |
| 526 | |
| 527 | FT_LOCAL( FT_Error ) |
| 528 | pfr_slot_load_bitmap( PFR_Slot glyph, |
| 529 | PFR_Size size, |
| 530 | FT_UInt glyph_index ) |
| 531 | { |
| 532 | FT_Error error; |
| 533 | PFR_Face face = (PFR_Face) glyph->root.face; |
| 534 | FT_Stream stream = face->root.stream; |
| 535 | PFR_PhyFont phys = &face->phy_font; |
| 536 | FT_ULong gps_offset; |
| 537 | FT_ULong gps_size; |
| 538 | PFR_Char character; |
| 539 | PFR_Strike strike; |
| 540 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 541 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 542 | character = &phys->chars[glyph_index]; |
| 543 | |
| 544 | /* Look-up a bitmap strike corresponding to the current */ |
| 545 | /* character dimensions */ |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 546 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 547 | FT_UInt n; |
| 548 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 549 | |
| 550 | strike = phys->strikes; |
| 551 | for ( n = 0; n < phys->num_strikes; n++ ) |
| 552 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 553 | if ( strike->x_ppm == (FT_UInt)size->root.metrics.x_ppem && |
| 554 | strike->y_ppm == (FT_UInt)size->root.metrics.y_ppem ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 555 | { |
| 556 | goto Found_Strike; |
| 557 | } |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 558 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 559 | strike++; |
| 560 | } |
| 561 | |
| 562 | /* couldn't find it */ |
Werner Lemberg | 779afe4 | 2003-06-22 15:33:53 +0000 | [diff] [blame] | 563 | return PFR_Err_Invalid_Argument; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | Found_Strike: |
| 567 | |
| 568 | /* Now lookup the glyph's position within the file */ |
| 569 | { |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 570 | FT_UInt char_len; |
| 571 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 572 | |
| 573 | char_len = 4; |
| 574 | if ( strike->flags & 1 ) char_len += 1; |
| 575 | if ( strike->flags & 2 ) char_len += 1; |
| 576 | if ( strike->flags & 4 ) char_len += 1; |
| 577 | |
| 578 | /* Access data directly in the frame to speed lookups */ |
| 579 | if ( FT_STREAM_SEEK( phys->bct_offset + strike->bct_offset ) || |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 580 | FT_FRAME_ENTER( char_len * strike->num_bitmaps ) ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 581 | goto Exit; |
| 582 | |
| 583 | pfr_lookup_bitmap_data( stream->cursor, |
| 584 | stream->limit, |
| 585 | strike->num_bitmaps, |
Werner Lemberg | 0240d29 | 2003-06-09 15:54:18 +0000 | [diff] [blame] | 586 | strike->flags, |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 587 | character->char_code, |
| 588 | &gps_offset, |
| 589 | &gps_size ); |
| 590 | |
| 591 | FT_FRAME_EXIT(); |
| 592 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 593 | if ( gps_size == 0 ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 594 | { |
| 595 | /* Could not find a bitmap program string for this glyph */ |
Werner Lemberg | 779afe4 | 2003-06-22 15:33:53 +0000 | [diff] [blame] | 596 | error = PFR_Err_Invalid_Argument; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 597 | goto Exit; |
| 598 | } |
| 599 | } |
| 600 | |
| 601 | /* get the bitmap metrics */ |
| 602 | { |
| 603 | FT_Long xpos, ypos, advance; |
| 604 | FT_UInt xsize, ysize, format; |
| 605 | FT_Byte* p; |
| 606 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 607 | |
David Turner | 1ae134a | 2006-02-21 16:50:17 +0000 | [diff] [blame] | 608 | /* compute linear advance */ |
| 609 | advance = character->advance; |
| 610 | if ( phys->metrics_resolution != phys->outline_resolution ) |
| 611 | advance = FT_MulDiv( advance, |
| 612 | phys->outline_resolution, |
| 613 | phys->metrics_resolution ); |
| 614 | |
| 615 | glyph->root.linearHoriAdvance = advance; |
| 616 | |
Werner Lemberg | 5edafed | 2006-02-22 08:23:35 +0000 | [diff] [blame^] | 617 | /* compute default advance, i.e., scaled advance. This can be */ |
| 618 | /* overridden in the bitmap header of certain glyphs. */ |
David Turner | 1ae134a | 2006-02-21 16:50:17 +0000 | [diff] [blame] | 619 | advance = FT_MulDiv( (FT_Fixed)size->root.metrics.x_ppem << 8, |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 620 | character->advance, |
| 621 | phys->metrics_resolution ); |
| 622 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 623 | if ( FT_STREAM_SEEK( face->header.gps_section_offset + gps_offset ) || |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 624 | FT_FRAME_ENTER( gps_size ) ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 625 | goto Exit; |
| 626 | |
| 627 | p = stream->cursor; |
| 628 | error = pfr_load_bitmap_metrics( &p, stream->limit, |
| 629 | advance, |
| 630 | &xpos, &ypos, |
| 631 | &xsize, &ysize, |
| 632 | &advance, &format ); |
| 633 | if ( !error ) |
| 634 | { |
| 635 | glyph->root.format = FT_GLYPH_FORMAT_BITMAP; |
David Turner | 4bdf435 | 2003-01-30 23:24:18 +0000 | [diff] [blame] | 636 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 637 | /* Set up glyph bitmap and metrics */ |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 638 | glyph->root.bitmap.width = (FT_Int)xsize; |
| 639 | glyph->root.bitmap.rows = (FT_Int)ysize; |
| 640 | glyph->root.bitmap.pitch = (FT_Long)( xsize + 7 ) >> 3; |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 641 | glyph->root.bitmap.pixel_mode = FT_PIXEL_MODE_MONO; |
| 642 | |
| 643 | glyph->root.metrics.width = (FT_Long)xsize << 6; |
| 644 | glyph->root.metrics.height = (FT_Long)ysize << 6; |
| 645 | glyph->root.metrics.horiBearingX = xpos << 6; |
| 646 | glyph->root.metrics.horiBearingY = ypos << 6; |
David Turner | 87c0d30 | 2003-12-24 01:10:46 +0000 | [diff] [blame] | 647 | glyph->root.metrics.horiAdvance = FT_PIX_ROUND( ( advance >> 2 ) ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 648 | glyph->root.metrics.vertBearingX = - glyph->root.metrics.width >> 1; |
| 649 | glyph->root.metrics.vertBearingY = 0; |
| 650 | glyph->root.metrics.vertAdvance = size->root.metrics.height; |
| 651 | |
| 652 | glyph->root.bitmap_left = xpos; |
| 653 | glyph->root.bitmap_top = ypos + ysize; |
| 654 | |
| 655 | /* Allocate and read bitmap data */ |
| 656 | { |
Werner Lemberg | 2e57343 | 2003-04-23 14:14:06 +0000 | [diff] [blame] | 657 | FT_ULong len = glyph->root.bitmap.pitch * ysize; |
| 658 | |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 659 | |
David Turner | 66cbc20 | 2003-03-20 07:04:40 +0000 | [diff] [blame] | 660 | error = ft_glyphslot_alloc_bitmap( &glyph->root, len ); |
| 661 | if ( !error ) |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 662 | { |
Werner Lemberg | a259b6d | 2003-09-22 09:53:56 +0000 | [diff] [blame] | 663 | error = pfr_load_bitmap_bits( |
| 664 | p, |
| 665 | stream->limit, |
| 666 | format, |
| 667 | FT_BOOL(face->header.color_flags & 2), |
| 668 | &glyph->root.bitmap ); |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 669 | } |
| 670 | } |
| 671 | } |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 672 | |
David Turner | 80171e0 | 2002-10-05 14:57:03 +0000 | [diff] [blame] | 673 | FT_FRAME_EXIT(); |
| 674 | } |
| 675 | |
| 676 | Exit: |
| 677 | return error; |
| 678 | } |
Werner Lemberg | eacb930 | 2002-10-07 10:12:43 +0000 | [diff] [blame] | 679 | |
| 680 | /* END */ |