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[FREETYPE]
[reactos.git] / reactos / lib / 3rdparty / freetype / src / type1 / t1gload.c
1 /***************************************************************************/
2 /* */
3 /* t1gload.c */
4 /* */
5 /* Type 1 Glyph Loader (body). */
6 /* */
7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010 by */
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
19 #include <ft2build.h>
20 #include "t1gload.h"
21 #include FT_INTERNAL_CALC_H
22 #include FT_INTERNAL_DEBUG_H
23 #include FT_INTERNAL_STREAM_H
24 #include FT_OUTLINE_H
25 #include FT_INTERNAL_POSTSCRIPT_AUX_H
26
27 #include "t1errors.h"
28
29
30 /*************************************************************************/
31 /* */
32 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
33 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
34 /* messages during execution. */
35 /* */
36 #undef FT_COMPONENT
37 #define FT_COMPONENT trace_t1gload
38
39
40 /*************************************************************************/
41 /*************************************************************************/
42 /*************************************************************************/
43 /********** *********/
44 /********** COMPUTE THE MAXIMUM ADVANCE WIDTH *********/
45 /********** *********/
46 /********** The following code is in charge of computing *********/
47 /********** the maximum advance width of the font. It *********/
48 /********** quickly processes each glyph charstring to *********/
49 /********** extract the value from either a `sbw' or `seac' *********/
50 /********** operator. *********/
51 /********** *********/
52 /*************************************************************************/
53 /*************************************************************************/
54 /*************************************************************************/
55
56
57 FT_LOCAL_DEF( FT_Error )
58 T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder,
59 FT_UInt glyph_index,
60 FT_Data* char_string )
61 {
62 T1_Face face = (T1_Face)decoder->builder.face;
63 T1_Font type1 = &face->type1;
64 FT_Error error = T1_Err_Ok;
65
66 #ifdef FT_CONFIG_OPTION_INCREMENTAL
67 FT_Incremental_InterfaceRec *inc =
68 face->root.internal->incremental_interface;
69 #endif
70
71
72 decoder->font_matrix = type1->font_matrix;
73 decoder->font_offset = type1->font_offset;
74
75 #ifdef FT_CONFIG_OPTION_INCREMENTAL
76
77 /* For incremental fonts get the character data using the */
78 /* callback function. */
79 if ( inc )
80 error = inc->funcs->get_glyph_data( inc->object,
81 glyph_index, char_string );
82 else
83
84 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
85
86 /* For ordinary fonts get the character data stored in the face record. */
87 {
88 char_string->pointer = type1->charstrings[glyph_index];
89 char_string->length = (FT_Int)type1->charstrings_len[glyph_index];
90 }
91
92 if ( !error )
93 error = decoder->funcs.parse_charstrings(
94 decoder, (FT_Byte*)char_string->pointer,
95 char_string->length );
96
97 #ifdef FT_CONFIG_OPTION_INCREMENTAL
98
99 /* Incremental fonts can optionally override the metrics. */
100 if ( !error && inc && inc->funcs->get_glyph_metrics )
101 {
102 FT_Incremental_MetricsRec metrics;
103
104
105 metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x );
106 metrics.bearing_y = 0;
107 metrics.advance = FIXED_TO_INT( decoder->builder.advance.x );
108 metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y );
109
110 error = inc->funcs->get_glyph_metrics( inc->object,
111 glyph_index, FALSE, &metrics );
112
113 decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x );
114 decoder->builder.advance.x = INT_TO_FIXED( metrics.advance );
115 decoder->builder.advance.y = INT_TO_FIXED( metrics.advance_v );
116 }
117
118 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
119
120 return error;
121 }
122
123
124 FT_CALLBACK_DEF( FT_Error )
125 T1_Parse_Glyph( T1_Decoder decoder,
126 FT_UInt glyph_index )
127 {
128 FT_Data glyph_data;
129 FT_Error error = T1_Parse_Glyph_And_Get_Char_String(
130 decoder, glyph_index, &glyph_data );
131
132
133 #ifdef FT_CONFIG_OPTION_INCREMENTAL
134
135 if ( !error )
136 {
137 T1_Face face = (T1_Face)decoder->builder.face;
138
139
140 if ( face->root.internal->incremental_interface )
141 face->root.internal->incremental_interface->funcs->free_glyph_data(
142 face->root.internal->incremental_interface->object,
143 &glyph_data );
144 }
145
146 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
147
148 return error;
149 }
150
151
152 FT_LOCAL_DEF( FT_Error )
153 T1_Compute_Max_Advance( T1_Face face,
154 FT_Pos* max_advance )
155 {
156 FT_Error error;
157 T1_DecoderRec decoder;
158 FT_Int glyph_index;
159 T1_Font type1 = &face->type1;
160 PSAux_Service psaux = (PSAux_Service)face->psaux;
161
162
163 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
164
165 *max_advance = 0;
166
167 /* initialize load decoder */
168 error = psaux->t1_decoder_funcs->init( &decoder,
169 (FT_Face)face,
170 0, /* size */
171 0, /* glyph slot */
172 (FT_Byte**)type1->glyph_names,
173 face->blend,
174 0,
175 FT_RENDER_MODE_NORMAL,
176 T1_Parse_Glyph );
177 if ( error )
178 return error;
179
180 decoder.builder.metrics_only = 1;
181 decoder.builder.load_points = 0;
182
183 decoder.num_subrs = type1->num_subrs;
184 decoder.subrs = type1->subrs;
185 decoder.subrs_len = type1->subrs_len;
186
187 decoder.buildchar = face->buildchar;
188 decoder.len_buildchar = face->len_buildchar;
189
190 *max_advance = 0;
191
192 /* for each glyph, parse the glyph charstring and extract */
193 /* the advance width */
194 for ( glyph_index = 0; glyph_index < type1->num_glyphs; glyph_index++ )
195 {
196 /* now get load the unscaled outline */
197 error = T1_Parse_Glyph( &decoder, glyph_index );
198 if ( glyph_index == 0 || decoder.builder.advance.x > *max_advance )
199 *max_advance = decoder.builder.advance.x;
200
201 /* ignore the error if one occurred - skip to next glyph */
202 }
203
204 psaux->t1_decoder_funcs->done( &decoder );
205
206 return T1_Err_Ok;
207 }
208
209
210 FT_LOCAL_DEF( FT_Error )
211 T1_Get_Advances( T1_Face face,
212 FT_UInt first,
213 FT_UInt count,
214 FT_ULong load_flags,
215 FT_Fixed* advances )
216 {
217 T1_DecoderRec decoder;
218 T1_Font type1 = &face->type1;
219 PSAux_Service psaux = (PSAux_Service)face->psaux;
220 FT_UInt nn;
221 FT_Error error;
222
223
224 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
225 {
226 for ( nn = 0; nn < count; nn++ )
227 advances[nn] = 0;
228
229 return T1_Err_Ok;
230 }
231
232 error = psaux->t1_decoder_funcs->init( &decoder,
233 (FT_Face)face,
234 0, /* size */
235 0, /* glyph slot */
236 (FT_Byte**)type1->glyph_names,
237 face->blend,
238 0,
239 FT_RENDER_MODE_NORMAL,
240 T1_Parse_Glyph );
241 if ( error )
242 return error;
243
244 decoder.builder.metrics_only = 1;
245 decoder.builder.load_points = 0;
246
247 decoder.num_subrs = type1->num_subrs;
248 decoder.subrs = type1->subrs;
249 decoder.subrs_len = type1->subrs_len;
250
251 decoder.buildchar = face->buildchar;
252 decoder.len_buildchar = face->len_buildchar;
253
254 for ( nn = 0; nn < count; nn++ )
255 {
256 error = T1_Parse_Glyph( &decoder, first + nn );
257 if ( !error )
258 advances[nn] = FIXED_TO_INT( decoder.builder.advance.x );
259 else
260 advances[nn] = 0;
261 }
262
263 return T1_Err_Ok;
264 }
265
266
267 FT_LOCAL_DEF( FT_Error )
268 T1_Load_Glyph( T1_GlyphSlot glyph,
269 T1_Size size,
270 FT_UInt glyph_index,
271 FT_Int32 load_flags )
272 {
273 FT_Error error;
274 T1_DecoderRec decoder;
275 T1_Face face = (T1_Face)glyph->root.face;
276 FT_Bool hinting;
277 T1_Font type1 = &face->type1;
278 PSAux_Service psaux = (PSAux_Service)face->psaux;
279 const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs;
280
281 FT_Matrix font_matrix;
282 FT_Vector font_offset;
283 FT_Data glyph_data;
284 FT_Bool must_finish_decoder = FALSE;
285 #ifdef FT_CONFIG_OPTION_INCREMENTAL
286 FT_Bool glyph_data_loaded = 0;
287 #endif
288
289
290 #ifdef FT_CONFIG_OPTION_INCREMENTAL
291 if ( glyph_index >= (FT_UInt)face->root.num_glyphs &&
292 !face->root.internal->incremental_interface )
293 #else
294 if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
295 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
296 {
297 error = T1_Err_Invalid_Argument;
298 goto Exit;
299 }
300
301 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
302
303 if ( load_flags & FT_LOAD_NO_RECURSE )
304 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
305
306 if ( size )
307 {
308 glyph->x_scale = size->root.metrics.x_scale;
309 glyph->y_scale = size->root.metrics.y_scale;
310 }
311 else
312 {
313 glyph->x_scale = 0x10000L;
314 glyph->y_scale = 0x10000L;
315 }
316
317 glyph->root.outline.n_points = 0;
318 glyph->root.outline.n_contours = 0;
319
320 hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
321 ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
322
323 glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
324
325 error = decoder_funcs->init( &decoder,
326 (FT_Face)face,
327 (FT_Size)size,
328 (FT_GlyphSlot)glyph,
329 (FT_Byte**)type1->glyph_names,
330 face->blend,
331 FT_BOOL( hinting ),
332 FT_LOAD_TARGET_MODE( load_flags ),
333 T1_Parse_Glyph );
334 if ( error )
335 goto Exit;
336
337 must_finish_decoder = TRUE;
338
339 decoder.builder.no_recurse = FT_BOOL(
340 ( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
341
342 decoder.num_subrs = type1->num_subrs;
343 decoder.subrs = type1->subrs;
344 decoder.subrs_len = type1->subrs_len;
345
346 decoder.buildchar = face->buildchar;
347 decoder.len_buildchar = face->len_buildchar;
348
349 /* now load the unscaled outline */
350 error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
351 &glyph_data );
352 if ( error )
353 goto Exit;
354 #ifdef FT_CONFIG_OPTION_INCREMENTAL
355 glyph_data_loaded = 1;
356 #endif
357
358 font_matrix = decoder.font_matrix;
359 font_offset = decoder.font_offset;
360
361 /* save new glyph tables */
362 decoder_funcs->done( &decoder );
363
364 must_finish_decoder = FALSE;
365
366 /* now, set the metrics -- this is rather simple, as */
367 /* the left side bearing is the xMin, and the top side */
368 /* bearing the yMax */
369 if ( !error )
370 {
371 glyph->root.outline.flags &= FT_OUTLINE_OWNER;
372 glyph->root.outline.flags |= FT_OUTLINE_REVERSE_FILL;
373
374 /* for composite glyphs, return only left side bearing and */
375 /* advance width */
376 if ( load_flags & FT_LOAD_NO_RECURSE )
377 {
378 FT_Slot_Internal internal = glyph->root.internal;
379
380
381 glyph->root.metrics.horiBearingX =
382 FIXED_TO_INT( decoder.builder.left_bearing.x );
383 glyph->root.metrics.horiAdvance =
384 FIXED_TO_INT( decoder.builder.advance.x );
385
386 internal->glyph_matrix = font_matrix;
387 internal->glyph_delta = font_offset;
388 internal->glyph_transformed = 1;
389 }
390 else
391 {
392 FT_BBox cbox;
393 FT_Glyph_Metrics* metrics = &glyph->root.metrics;
394 FT_Vector advance;
395
396
397 /* copy the _unscaled_ advance width */
398 metrics->horiAdvance =
399 FIXED_TO_INT( decoder.builder.advance.x );
400 glyph->root.linearHoriAdvance =
401 FIXED_TO_INT( decoder.builder.advance.x );
402 glyph->root.internal->glyph_transformed = 0;
403
404 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
405 {
406 /* make up vertical ones */
407 metrics->vertAdvance = ( face->type1.font_bbox.yMax -
408 face->type1.font_bbox.yMin ) >> 16;
409 glyph->root.linearVertAdvance = metrics->vertAdvance;
410 }
411 else
412 {
413 metrics->vertAdvance =
414 FIXED_TO_INT( decoder.builder.advance.y );
415 glyph->root.linearVertAdvance =
416 FIXED_TO_INT( decoder.builder.advance.y );
417 }
418
419 glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
420
421 if ( size && size->root.metrics.y_ppem < 24 )
422 glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;
423
424 #if 1
425 /* apply the font matrix, if any */
426 if ( font_matrix.xx != 0x10000L || font_matrix.yy != font_matrix.xx ||
427 font_matrix.xy != 0 || font_matrix.yx != 0 )
428 FT_Outline_Transform( &glyph->root.outline, &font_matrix );
429
430 if ( font_offset.x || font_offset.y )
431 FT_Outline_Translate( &glyph->root.outline,
432 font_offset.x,
433 font_offset.y );
434
435 advance.x = metrics->horiAdvance;
436 advance.y = 0;
437 FT_Vector_Transform( &advance, &font_matrix );
438 metrics->horiAdvance = advance.x + font_offset.x;
439 advance.x = 0;
440 advance.y = metrics->vertAdvance;
441 FT_Vector_Transform( &advance, &font_matrix );
442 metrics->vertAdvance = advance.y + font_offset.y;
443 #endif
444
445 if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
446 {
447 /* scale the outline and the metrics */
448 FT_Int n;
449 FT_Outline* cur = decoder.builder.base;
450 FT_Vector* vec = cur->points;
451 FT_Fixed x_scale = glyph->x_scale;
452 FT_Fixed y_scale = glyph->y_scale;
453
454
455 /* First of all, scale the points, if we are not hinting */
456 if ( !hinting || ! decoder.builder.hints_funcs )
457 for ( n = cur->n_points; n > 0; n--, vec++ )
458 {
459 vec->x = FT_MulFix( vec->x, x_scale );
460 vec->y = FT_MulFix( vec->y, y_scale );
461 }
462
463 /* Then scale the metrics */
464 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
465 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
466 }
467
468 /* compute the other metrics */
469 FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
470
471 metrics->width = cbox.xMax - cbox.xMin;
472 metrics->height = cbox.yMax - cbox.yMin;
473
474 metrics->horiBearingX = cbox.xMin;
475 metrics->horiBearingY = cbox.yMax;
476
477 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
478 {
479 /* make up vertical ones */
480 ft_synthesize_vertical_metrics( metrics,
481 metrics->vertAdvance );
482 }
483 }
484
485 /* Set control data to the glyph charstrings. Note that this is */
486 /* _not_ zero-terminated. */
487 glyph->root.control_data = (FT_Byte*)glyph_data.pointer;
488 glyph->root.control_len = glyph_data.length;
489 }
490
491
492 Exit:
493
494 #ifdef FT_CONFIG_OPTION_INCREMENTAL
495 if ( glyph_data_loaded && face->root.internal->incremental_interface )
496 {
497 face->root.internal->incremental_interface->funcs->free_glyph_data(
498 face->root.internal->incremental_interface->object,
499 &glyph_data );
500
501 /* Set the control data to null - it is no longer available if */
502 /* loaded incrementally. */
503 glyph->root.control_data = 0;
504 glyph->root.control_len = 0;
505 }
506 #endif
507
508 if ( must_finish_decoder )
509 decoder_funcs->done( &decoder );
510
511 return error;
512 }
513
514
515 /* END */
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