1 /***************************************************************************/
5 /* Type 1 Glyph Loader (body). */
7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
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. */
16 /***************************************************************************/
21 #include FT_INTERNAL_CALC_H
22 #include FT_INTERNAL_DEBUG_H
23 #include FT_INTERNAL_STREAM_H
25 #include FT_INTERNAL_POSTSCRIPT_AUX_H
30 /*************************************************************************/
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. */
37 #define FT_COMPONENT trace_t1gload
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 /*************************************************************************/
57 FT_LOCAL_DEF( FT_Error )
58 T1_Parse_Glyph_And_Get_Char_String( T1_Decoder decoder,
60 FT_Data* char_string )
62 T1_Face face = (T1_Face)decoder->builder.face;
63 T1_Font type1 = &face->type1;
64 FT_Error error = T1_Err_Ok;
66 #ifdef FT_CONFIG_OPTION_INCREMENTAL
67 FT_Incremental_InterfaceRec *inc =
68 face->root.internal->incremental_interface;
72 decoder->font_matrix = type1->font_matrix;
73 decoder->font_offset = type1->font_offset;
75 #ifdef FT_CONFIG_OPTION_INCREMENTAL
77 /* For incremental fonts get the character data using the */
78 /* callback function. */
80 error = inc->funcs->get_glyph_data( inc->object,
81 glyph_index, char_string );
84 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
86 /* For ordinary fonts get the character data stored in the face record. */
88 char_string->pointer = type1->charstrings[glyph_index];
89 char_string->length = (FT_Int)type1->charstrings_len[glyph_index];
93 error = decoder->funcs.parse_charstrings(
94 decoder, (FT_Byte*)char_string->pointer,
95 char_string->length );
97 #ifdef FT_CONFIG_OPTION_INCREMENTAL
99 /* Incremental fonts can optionally override the metrics. */
100 if ( !error && inc && inc->funcs->get_glyph_metrics )
102 FT_Incremental_MetricsRec metrics;
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 );
110 error = inc->funcs->get_glyph_metrics( inc->object,
111 glyph_index, FALSE, &metrics );
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 );
118 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
124 FT_CALLBACK_DEF( FT_Error )
125 T1_Parse_Glyph( T1_Decoder decoder,
126 FT_UInt glyph_index )
129 FT_Error error = T1_Parse_Glyph_And_Get_Char_String(
130 decoder, glyph_index, &glyph_data );
133 #ifdef FT_CONFIG_OPTION_INCREMENTAL
137 T1_Face face = (T1_Face)decoder->builder.face;
140 if ( face->root.internal->incremental_interface )
141 face->root.internal->incremental_interface->funcs->free_glyph_data(
142 face->root.internal->incremental_interface->object,
146 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
152 FT_LOCAL_DEF( FT_Error )
153 T1_Compute_Max_Advance( T1_Face face,
154 FT_Pos* max_advance )
157 T1_DecoderRec decoder;
159 T1_Font type1 = &face->type1;
160 PSAux_Service psaux = (PSAux_Service)face->psaux;
163 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
167 /* initialize load decoder */
168 error = psaux->t1_decoder_funcs->init( &decoder,
172 (FT_Byte**)type1->glyph_names,
175 FT_RENDER_MODE_NORMAL,
180 decoder.builder.metrics_only = 1;
181 decoder.builder.load_points = 0;
183 decoder.num_subrs = type1->num_subrs;
184 decoder.subrs = type1->subrs;
185 decoder.subrs_len = type1->subrs_len;
187 decoder.buildchar = face->buildchar;
188 decoder.len_buildchar = face->len_buildchar;
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++ )
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;
201 /* ignore the error if one occurred - skip to next glyph */
204 psaux->t1_decoder_funcs->done( &decoder );
210 FT_LOCAL_DEF( FT_Error )
211 T1_Get_Advances( FT_Face t1face, /* T1_Face */
217 T1_Face face = (T1_Face)t1face;
218 T1_DecoderRec decoder;
219 T1_Font type1 = &face->type1;
220 PSAux_Service psaux = (PSAux_Service)face->psaux;
225 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
227 for ( nn = 0; nn < count; nn++ )
233 error = psaux->t1_decoder_funcs->init( &decoder,
237 (FT_Byte**)type1->glyph_names,
240 FT_RENDER_MODE_NORMAL,
245 decoder.builder.metrics_only = 1;
246 decoder.builder.load_points = 0;
248 decoder.num_subrs = type1->num_subrs;
249 decoder.subrs = type1->subrs;
250 decoder.subrs_len = type1->subrs_len;
252 decoder.buildchar = face->buildchar;
253 decoder.len_buildchar = face->len_buildchar;
255 for ( nn = 0; nn < count; nn++ )
257 error = T1_Parse_Glyph( &decoder, first + nn );
259 advances[nn] = FIXED_TO_INT( decoder.builder.advance.x );
268 FT_LOCAL_DEF( FT_Error )
269 T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */
270 FT_Size t1size, /* T1_Size */
272 FT_Int32 load_flags )
274 T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph;
276 T1_DecoderRec decoder;
277 T1_Face face = (T1_Face)t1glyph->face;
279 T1_Font type1 = &face->type1;
280 PSAux_Service psaux = (PSAux_Service)face->psaux;
281 const T1_Decoder_Funcs decoder_funcs = psaux->t1_decoder_funcs;
283 FT_Matrix font_matrix;
284 FT_Vector font_offset;
286 FT_Bool must_finish_decoder = FALSE;
287 #ifdef FT_CONFIG_OPTION_INCREMENTAL
288 FT_Bool glyph_data_loaded = 0;
292 #ifdef FT_CONFIG_OPTION_INCREMENTAL
293 if ( glyph_index >= (FT_UInt)face->root.num_glyphs &&
294 !face->root.internal->incremental_interface )
296 if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
297 #endif /* FT_CONFIG_OPTION_INCREMENTAL */
299 error = T1_Err_Invalid_Argument;
303 FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
305 if ( load_flags & FT_LOAD_NO_RECURSE )
306 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
310 glyph->x_scale = t1size->metrics.x_scale;
311 glyph->y_scale = t1size->metrics.y_scale;
315 glyph->x_scale = 0x10000L;
316 glyph->y_scale = 0x10000L;
319 t1glyph->outline.n_points = 0;
320 t1glyph->outline.n_contours = 0;
322 hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
323 ( load_flags & FT_LOAD_NO_HINTING ) == 0 );
325 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
327 error = decoder_funcs->init( &decoder,
331 (FT_Byte**)type1->glyph_names,
334 FT_LOAD_TARGET_MODE( load_flags ),
339 must_finish_decoder = TRUE;
341 decoder.builder.no_recurse = FT_BOOL(
342 ( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
344 decoder.num_subrs = type1->num_subrs;
345 decoder.subrs = type1->subrs;
346 decoder.subrs_len = type1->subrs_len;
348 decoder.buildchar = face->buildchar;
349 decoder.len_buildchar = face->len_buildchar;
351 /* now load the unscaled outline */
352 error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
356 #ifdef FT_CONFIG_OPTION_INCREMENTAL
357 glyph_data_loaded = 1;
360 font_matrix = decoder.font_matrix;
361 font_offset = decoder.font_offset;
363 /* save new glyph tables */
364 decoder_funcs->done( &decoder );
366 must_finish_decoder = FALSE;
368 /* now, set the metrics -- this is rather simple, as */
369 /* the left side bearing is the xMin, and the top side */
370 /* bearing the yMax */
373 t1glyph->outline.flags &= FT_OUTLINE_OWNER;
374 t1glyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;
376 /* for composite glyphs, return only left side bearing and */
378 if ( load_flags & FT_LOAD_NO_RECURSE )
380 FT_Slot_Internal internal = t1glyph->internal;
383 t1glyph->metrics.horiBearingX =
384 FIXED_TO_INT( decoder.builder.left_bearing.x );
385 t1glyph->metrics.horiAdvance =
386 FIXED_TO_INT( decoder.builder.advance.x );
388 internal->glyph_matrix = font_matrix;
389 internal->glyph_delta = font_offset;
390 internal->glyph_transformed = 1;
395 FT_Glyph_Metrics* metrics = &t1glyph->metrics;
399 /* copy the _unscaled_ advance width */
400 metrics->horiAdvance =
401 FIXED_TO_INT( decoder.builder.advance.x );
402 t1glyph->linearHoriAdvance =
403 FIXED_TO_INT( decoder.builder.advance.x );
404 t1glyph->internal->glyph_transformed = 0;
406 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
408 /* make up vertical ones */
409 metrics->vertAdvance = ( face->type1.font_bbox.yMax -
410 face->type1.font_bbox.yMin ) >> 16;
411 t1glyph->linearVertAdvance = metrics->vertAdvance;
415 metrics->vertAdvance =
416 FIXED_TO_INT( decoder.builder.advance.y );
417 t1glyph->linearVertAdvance =
418 FIXED_TO_INT( decoder.builder.advance.y );
421 t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
423 if ( t1size && t1size->metrics.y_ppem < 24 )
424 t1glyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;
427 /* apply the font matrix, if any */
428 if ( font_matrix.xx != 0x10000L || font_matrix.yy != font_matrix.xx ||
429 font_matrix.xy != 0 || font_matrix.yx != 0 )
430 FT_Outline_Transform( &t1glyph->outline, &font_matrix );
432 if ( font_offset.x || font_offset.y )
433 FT_Outline_Translate( &t1glyph->outline,
437 advance.x = metrics->horiAdvance;
439 FT_Vector_Transform( &advance, &font_matrix );
440 metrics->horiAdvance = advance.x + font_offset.x;
442 advance.y = metrics->vertAdvance;
443 FT_Vector_Transform( &advance, &font_matrix );
444 metrics->vertAdvance = advance.y + font_offset.y;
447 if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
449 /* scale the outline and the metrics */
451 FT_Outline* cur = decoder.builder.base;
452 FT_Vector* vec = cur->points;
453 FT_Fixed x_scale = glyph->x_scale;
454 FT_Fixed y_scale = glyph->y_scale;
457 /* First of all, scale the points, if we are not hinting */
458 if ( !hinting || ! decoder.builder.hints_funcs )
459 for ( n = cur->n_points; n > 0; n--, vec++ )
461 vec->x = FT_MulFix( vec->x, x_scale );
462 vec->y = FT_MulFix( vec->y, y_scale );
465 /* Then scale the metrics */
466 metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
467 metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
470 /* compute the other metrics */
471 FT_Outline_Get_CBox( &t1glyph->outline, &cbox );
473 metrics->width = cbox.xMax - cbox.xMin;
474 metrics->height = cbox.yMax - cbox.yMin;
476 metrics->horiBearingX = cbox.xMin;
477 metrics->horiBearingY = cbox.yMax;
479 if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
481 /* make up vertical ones */
482 ft_synthesize_vertical_metrics( metrics,
483 metrics->vertAdvance );
487 /* Set control data to the glyph charstrings. Note that this is */
488 /* _not_ zero-terminated. */
489 t1glyph->control_data = (FT_Byte*)glyph_data.pointer;
490 t1glyph->control_len = glyph_data.length;
496 #ifdef FT_CONFIG_OPTION_INCREMENTAL
497 if ( glyph_data_loaded && face->root.internal->incremental_interface )
499 face->root.internal->incremental_interface->funcs->free_glyph_data(
500 face->root.internal->incremental_interface->object,
503 /* Set the control data to null - it is no longer available if */
504 /* loaded incrementally. */
505 t1glyph->control_data = 0;
506 t1glyph->control_len = 0;
510 if ( must_finish_decoder )
511 decoder_funcs->done( &decoder );