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( T1_Face face,
217
T1_DecoderRec decoder;
218
T1_Font type1 = &face->type1;
219
PSAux_Service psaux = (PSAux_Service)face->psaux;
224
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
226
for ( nn = 0; nn < count; nn++ )
232
error = psaux->t1_decoder_funcs->init( &decoder,
236
(FT_Byte**)type1->glyph_names,
239
FT_RENDER_MODE_NORMAL,
244
decoder.builder.metrics_only = 1;
245
decoder.builder.load_points = 0;
247
decoder.num_subrs = type1->num_subrs;
248
decoder.subrs = type1->subrs;
249
decoder.subrs_len = type1->subrs_len;
251
decoder.buildchar = face->buildchar;
252
decoder.len_buildchar = face->len_buildchar;
254
for ( nn = 0; nn < count; nn++ )
256
error = T1_Parse_Glyph( &decoder, first + nn );
258
advances[nn] = FIXED_TO_INT( decoder.builder.advance.x );
267
FT_LOCAL_DEF( FT_Error )
268
T1_Load_Glyph( T1_GlyphSlot glyph,
271
FT_Int32 load_flags )
274
T1_DecoderRec decoder;
275
T1_Face face = (T1_Face)glyph->root.face;
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;
281
FT_Matrix font_matrix;
282
FT_Vector font_offset;
284
FT_Bool must_finish_decoder = FALSE;
285
#ifdef FT_CONFIG_OPTION_INCREMENTAL
286
FT_Bool glyph_data_loaded = 0;
290
#ifdef FT_CONFIG_OPTION_INCREMENTAL
291
if ( glyph_index >= (FT_UInt)face->root.num_glyphs &&
292
!face->root.internal->incremental_interface )
294
if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
295
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
297
error = T1_Err_Invalid_Argument;
301
FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
303
if ( load_flags & FT_LOAD_NO_RECURSE )
304
load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;
308
glyph->x_scale = size->root.metrics.x_scale;
309
glyph->y_scale = size->root.metrics.y_scale;
313
glyph->x_scale = 0x10000L;
314
glyph->y_scale = 0x10000L;
317
glyph->root.outline.n_points = 0;
318
glyph->root.outline.n_contours = 0;
320
hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
321
( load_flags & FT_LOAD_NO_HINTING ) == 0 );
323
glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
325
error = decoder_funcs->init( &decoder,
329
(FT_Byte**)type1->glyph_names,
332
FT_LOAD_TARGET_MODE( load_flags ),
337
must_finish_decoder = TRUE;
339
decoder.builder.no_recurse = FT_BOOL(
340
( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
342
decoder.num_subrs = type1->num_subrs;
343
decoder.subrs = type1->subrs;
344
decoder.subrs_len = type1->subrs_len;
346
decoder.buildchar = face->buildchar;
347
decoder.len_buildchar = face->len_buildchar;
349
/* now load the unscaled outline */
350
error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
354
#ifdef FT_CONFIG_OPTION_INCREMENTAL
355
glyph_data_loaded = 1;
358
font_matrix = decoder.font_matrix;
359
font_offset = decoder.font_offset;
361
/* save new glyph tables */
362
decoder_funcs->done( &decoder );
364
must_finish_decoder = FALSE;
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 */
371
glyph->root.outline.flags &= FT_OUTLINE_OWNER;
372
glyph->root.outline.flags |= FT_OUTLINE_REVERSE_FILL;
374
/* for composite glyphs, return only left side bearing and */
376
if ( load_flags & FT_LOAD_NO_RECURSE )
378
FT_Slot_Internal internal = glyph->root.internal;
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 );
386
internal->glyph_matrix = font_matrix;
387
internal->glyph_delta = font_offset;
388
internal->glyph_transformed = 1;
393
FT_Glyph_Metrics* metrics = &glyph->root.metrics;
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;
404
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
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;
413
metrics->vertAdvance =
414
FIXED_TO_INT( decoder.builder.advance.y );
415
glyph->root.linearVertAdvance =
416
FIXED_TO_INT( decoder.builder.advance.y );
419
glyph->root.format = FT_GLYPH_FORMAT_OUTLINE;
421
if ( size && size->root.metrics.y_ppem < 24 )
422
glyph->root.outline.flags |= FT_OUTLINE_HIGH_PRECISION;
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 );
430
if ( font_offset.x || font_offset.y )
431
FT_Outline_Translate( &glyph->root.outline,
435
advance.x = metrics->horiAdvance;
437
FT_Vector_Transform( &advance, &font_matrix );
438
metrics->horiAdvance = advance.x + font_offset.x;
440
advance.y = metrics->vertAdvance;
441
FT_Vector_Transform( &advance, &font_matrix );
442
metrics->vertAdvance = advance.y + font_offset.y;
445
if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
447
/* scale the outline and the metrics */
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;
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++ )
459
vec->x = FT_MulFix( vec->x, x_scale );
460
vec->y = FT_MulFix( vec->y, y_scale );
463
/* Then scale the metrics */
464
metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
465
metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
468
/* compute the other metrics */
469
FT_Outline_Get_CBox( &glyph->root.outline, &cbox );
471
metrics->width = cbox.xMax - cbox.xMin;
472
metrics->height = cbox.yMax - cbox.yMin;
474
metrics->horiBearingX = cbox.xMin;
475
metrics->horiBearingY = cbox.yMax;
477
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
479
/* make up vertical ones */
480
ft_synthesize_vertical_metrics( metrics,
481
metrics->vertAdvance );
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;
494
#ifdef FT_CONFIG_OPTION_INCREMENTAL
495
if ( glyph_data_loaded && face->root.internal->incremental_interface )
497
face->root.internal->incremental_interface->funcs->free_glyph_data(
498
face->root.internal->incremental_interface->object,
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;
508
if ( must_finish_decoder )
509
decoder_funcs->done( &decoder );