WebSVN – Kolibri OS – Blame – /programs/develop/libraries/freetype/src/type1/t1gload.c

Rev	Author	Line No.	Line
3918	Serge	1	/***************************************************************************/
		2	/* */
		3	/* t1gload.c */
		4	/* */
		5	/* Type 1 Glyph Loader (body). */
		6	/* */
		7	/* Copyright 1996-2006, 2008-2010, 2013 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
		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 = FT_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 FT_Err_Ok;
		207	}
		208
		209
		210	FT_LOCAL_DEF( FT_Error )
		211	T1_Get_Advances( FT_Face t1face, /* T1_Face */
		212	FT_UInt first,
		213	FT_UInt count,
		214	FT_Int32 load_flags,
		215	FT_Fixed* advances )
		216	{
		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;
		221	FT_UInt nn;
		222	FT_Error error;
		223
		224
		225	if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
		226	{
		227	for ( nn = 0; nn < count; nn++ )
		228	advances[nn] = 0;
		229
		230	return FT_Err_Ok;
		231	}
		232
		233	error = psaux->t1_decoder_funcs->init( &decoder,
		234	(FT_Face)face,
		235	0, /* size */
		236	0, /* glyph slot */
		237	(FT_Byte**)type1->glyph_names,
		238	face->blend,
		239	0,
		240	FT_RENDER_MODE_NORMAL,
		241	T1_Parse_Glyph );
		242	if ( error )
		243	return error;
		244
		245	decoder.builder.metrics_only = 1;
		246	decoder.builder.load_points = 0;
		247
		248	decoder.num_subrs = type1->num_subrs;
		249	decoder.subrs = type1->subrs;
		250	decoder.subrs_len = type1->subrs_len;
		251
		252	decoder.buildchar = face->buildchar;
		253	decoder.len_buildchar = face->len_buildchar;
		254
		255	for ( nn = 0; nn < count; nn++ )
		256	{
		257	error = T1_Parse_Glyph( &decoder, first + nn );
		258	if ( !error )
		259	advances[nn] = FIXED_TO_INT( decoder.builder.advance.x );
		260	else
		261	advances[nn] = 0;
		262	}
		263
		264	return FT_Err_Ok;
		265	}
		266
		267
		268	FT_LOCAL_DEF( FT_Error )
		269	T1_Load_Glyph( FT_GlyphSlot t1glyph, /* T1_GlyphSlot */
		270	FT_Size t1size, /* T1_Size */
		271	FT_UInt glyph_index,
		272	FT_Int32 load_flags )
		273	{
		274	T1_GlyphSlot glyph = (T1_GlyphSlot)t1glyph;
		275	FT_Error error;
		276	T1_DecoderRec decoder;
		277	T1_Face face = (T1_Face)t1glyph->face;
		278	FT_Bool hinting;
		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;
		282
		283	FT_Matrix font_matrix;
		284	FT_Vector font_offset;
		285	FT_Data glyph_data;
		286	FT_Bool must_finish_decoder = FALSE;
		287	#ifdef FT_CONFIG_OPTION_INCREMENTAL
		288	FT_Bool glyph_data_loaded = 0;
		289	#endif
		290
		291
		292	#ifdef FT_CONFIG_OPTION_INCREMENTAL
		293	if ( glyph_index >= (FT_UInt)face->root.num_glyphs &&
		294	!face->root.internal->incremental_interface )
		295	#else
		296	if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
		297	#endif /* FT_CONFIG_OPTION_INCREMENTAL */
		298	{
		299	error = FT_THROW( Invalid_Argument );
		300	goto Exit;
		301	}
		302
		303	FT_ASSERT( ( face->len_buildchar == 0 ) == ( face->buildchar == NULL ) );
		304
		305	if ( load_flags & FT_LOAD_NO_RECURSE )
		306	load_flags \|= FT_LOAD_NO_SCALE \| FT_LOAD_NO_HINTING;
		307
		308	if ( t1size )
		309	{
		310	glyph->x_scale = t1size->metrics.x_scale;
		311	glyph->y_scale = t1size->metrics.y_scale;
		312	}
		313	else
		314	{
		315	glyph->x_scale = 0x10000L;
		316	glyph->y_scale = 0x10000L;
		317	}
		318
		319	t1glyph->outline.n_points = 0;
		320	t1glyph->outline.n_contours = 0;
		321
		322	hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE ) == 0 &&
		323	( load_flags & FT_LOAD_NO_HINTING ) == 0 );
		324
		325	t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
		326
		327	error = decoder_funcs->init( &decoder,
		328	t1glyph->face,
		329	t1size,
		330	t1glyph,
		331	(FT_Byte**)type1->glyph_names,
		332	face->blend,
		333	FT_BOOL( hinting ),
		334	FT_LOAD_TARGET_MODE( load_flags ),
		335	T1_Parse_Glyph );
		336	if ( error )
		337	goto Exit;
		338
		339	must_finish_decoder = TRUE;
		340
		341	decoder.builder.no_recurse = FT_BOOL(
		342	( load_flags & FT_LOAD_NO_RECURSE ) != 0 );
		343
		344	decoder.num_subrs = type1->num_subrs;
		345	decoder.subrs = type1->subrs;
		346	decoder.subrs_len = type1->subrs_len;
		347
		348	decoder.buildchar = face->buildchar;
		349	decoder.len_buildchar = face->len_buildchar;
		350
		351	/* now load the unscaled outline */
		352	error = T1_Parse_Glyph_And_Get_Char_String( &decoder, glyph_index,
		353	&glyph_data );
		354	if ( error )
		355	goto Exit;
		356	#ifdef FT_CONFIG_OPTION_INCREMENTAL
		357	glyph_data_loaded = 1;
		358	#endif
		359
		360	font_matrix = decoder.font_matrix;
		361	font_offset = decoder.font_offset;
		362
		363	/* save new glyph tables */
		364	decoder_funcs->done( &decoder );
		365
		366	must_finish_decoder = FALSE;
		367
		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 */
		371	if ( !error )
		372	{
		373	t1glyph->outline.flags &= FT_OUTLINE_OWNER;
		374	t1glyph->outline.flags \|= FT_OUTLINE_REVERSE_FILL;
		375
		376	/* for composite glyphs, return only left side bearing and */
		377	/* advance width */
		378	if ( load_flags & FT_LOAD_NO_RECURSE )
		379	{
		380	FT_Slot_Internal internal = t1glyph->internal;
		381
		382
		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 );
		387
		388	internal->glyph_matrix = font_matrix;
		389	internal->glyph_delta = font_offset;
		390	internal->glyph_transformed = 1;
		391	}
		392	else
		393	{
		394	FT_BBox cbox;
		395	FT_Glyph_Metrics* metrics = &t1glyph->metrics;
		396	FT_Vector advance;
		397
		398
		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;
		405
		406	if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
		407	{
		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;
		412	}
		413	else
		414	{
		415	metrics->vertAdvance =
		416	FIXED_TO_INT( decoder.builder.advance.y );
		417	t1glyph->linearVertAdvance =
		418	FIXED_TO_INT( decoder.builder.advance.y );
		419	}
		420
		421	t1glyph->format = FT_GLYPH_FORMAT_OUTLINE;
		422
		423	if ( t1size && t1size->metrics.y_ppem < 24 )
		424	t1glyph->outline.flags \|= FT_OUTLINE_HIGH_PRECISION;
		425
		426	#if 1
		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 );
		431
		432	if ( font_offset.x \|\| font_offset.y )
		433	FT_Outline_Translate( &t1glyph->outline,
		434	font_offset.x,
		435	font_offset.y );
		436
		437	advance.x = metrics->horiAdvance;
		438	advance.y = 0;
		439	FT_Vector_Transform( &advance, &font_matrix );
		440	metrics->horiAdvance = advance.x + font_offset.x;
		441	advance.x = 0;
		442	advance.y = metrics->vertAdvance;
		443	FT_Vector_Transform( &advance, &font_matrix );
		444	metrics->vertAdvance = advance.y + font_offset.y;
		445	#endif
		446
		447	if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
		448	{
		449	/* scale the outline and the metrics */
		450	FT_Int n;
		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;
		455
		456
		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++ )
		460	{
		461	vec->x = FT_MulFix( vec->x, x_scale );
		462	vec->y = FT_MulFix( vec->y, y_scale );
		463	}
		464
		465	/* Then scale the metrics */
		466	metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
		467	metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
		468	}
		469
		470	/* compute the other metrics */
		471	FT_Outline_Get_CBox( &t1glyph->outline, &cbox );
		472
		473	metrics->width = cbox.xMax - cbox.xMin;
		474	metrics->height = cbox.yMax - cbox.yMin;
		475
		476	metrics->horiBearingX = cbox.xMin;
		477	metrics->horiBearingY = cbox.yMax;
		478
		479	if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
		480	{
		481	/* make up vertical ones */
		482	ft_synthesize_vertical_metrics( metrics,
		483	metrics->vertAdvance );
		484	}
		485	}
		486
		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;
		491	}
		492
		493
		494	Exit:
		495
		496	#ifdef FT_CONFIG_OPTION_INCREMENTAL
		497	if ( glyph_data_loaded && face->root.internal->incremental_interface )
		498	{
		499	face->root.internal->incremental_interface->funcs->free_glyph_data(
		500	face->root.internal->incremental_interface->object,
		501	&glyph_data );
		502
		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;
		507	}
		508	#endif
		509
		510	if ( must_finish_decoder )
		511	decoder_funcs->done( &decoder );
		512
		513	return error;
		514	}
		515
		516
		517	/* END */

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(root)/programs/develop/libraries/freetype/src/type1/t1gload.c – Rev 3918