WebSVN – Kolibri OS – Blame – /programs/develop/libraries/freetype/src/truetype/ttobjs.c

Rev	Author	Line No.	Line
3918	Serge	1	/***************************************************************************/
		2	/* */
		3	/* ttobjs.c */
		4	/* */
		5	/* Objects manager (body). */
		6	/* */
		7	/* Copyright 1996-2013 */
		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 FT_INTERNAL_DEBUG_H
		21	#include FT_INTERNAL_STREAM_H
		22	#include FT_TRUETYPE_TAGS_H
		23	#include FT_INTERNAL_SFNT_H
		24	#include FT_TRUETYPE_DRIVER_H
		25
		26	#include "ttgload.h"
		27	#include "ttpload.h"
		28
		29	#include "tterrors.h"
		30
		31	#ifdef TT_USE_BYTECODE_INTERPRETER
		32	#include "ttinterp.h"
		33	#endif
		34
		35	#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
		36	#include FT_TRUETYPE_UNPATENTED_H
		37	#endif
		38
		39	#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
		40	#include "ttgxvar.h"
		41	#endif
		42
		43	/*************************************************************************/
		44	/* */
		45	/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
		46	/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
		47	/* messages during execution. */
		48	/* */
		49	#undef FT_COMPONENT
		50	#define FT_COMPONENT trace_ttobjs
		51
		52
		53	#ifdef TT_USE_BYTECODE_INTERPRETER
		54
		55	/*************************************************************************/
		56	/* */
		57	/* GLYPH ZONE FUNCTIONS */
		58	/* */
		59	/*************************************************************************/
		60
		61
		62	/*************************************************************************/
		63	/* */
		64	/* */
		65	/* tt_glyphzone_done */
		66	/* */
		67	/* */
		68	/* Deallocate a glyph zone. */
		69	/* */
		70	/* */
		71	/* zone :: A pointer to the target glyph zone. */
		72	/* */
		73	FT_LOCAL_DEF( void )
		74	tt_glyphzone_done( TT_GlyphZone zone )
		75	{
		76	FT_Memory memory = zone->memory;
		77
		78
		79	if ( memory )
		80	{
		81	FT_FREE( zone->contours );
		82	FT_FREE( zone->tags );
		83	FT_FREE( zone->cur );
		84	FT_FREE( zone->org );
		85	FT_FREE( zone->orus );
		86
		87	zone->max_points = zone->n_points = 0;
		88	zone->max_contours = zone->n_contours = 0;
		89	zone->memory = NULL;
		90	}
		91	}
		92
		93
		94	/*************************************************************************/
		95	/* */
		96	/* */
		97	/* tt_glyphzone_new */
		98	/* */
		99	/* */
		100	/* Allocate a new glyph zone. */
		101	/* */
		102	/* */
		103	/* memory :: A handle to the current memory object. */
		104	/* */
		105	/* maxPoints :: The capacity of glyph zone in points. */
		106	/* */
		107	/* maxContours :: The capacity of glyph zone in contours. */
		108	/* */
		109	/* */
		110	/* zone :: A pointer to the target glyph zone record. */
		111	/* */
		112	/* */
		113	/* FreeType error code. 0 means success. */
		114	/* */
		115	FT_LOCAL_DEF( FT_Error )
		116	tt_glyphzone_new( FT_Memory memory,
		117	FT_UShort maxPoints,
		118	FT_Short maxContours,
		119	TT_GlyphZone zone )
		120	{
		121	FT_Error error;
		122
		123
		124	FT_MEM_ZERO( zone, sizeof ( *zone ) );
		125	zone->memory = memory;
		126
		127	if ( FT_NEW_ARRAY( zone->org, maxPoints ) \|\|
		128	FT_NEW_ARRAY( zone->cur, maxPoints ) \|\|
		129	FT_NEW_ARRAY( zone->orus, maxPoints ) \|\|
		130	FT_NEW_ARRAY( zone->tags, maxPoints ) \|\|
		131	FT_NEW_ARRAY( zone->contours, maxContours ) )
		132	{
		133	tt_glyphzone_done( zone );
		134	}
		135	else
		136	{
		137	zone->max_points = maxPoints;
		138	zone->max_contours = maxContours;
		139	}
		140
		141	return error;
		142	}
		143	#endif /* TT_USE_BYTECODE_INTERPRETER */
		144
		145
		146	/* Compare the face with a list of well-known `tricky' fonts. */
		147	/* This list shall be expanded as we find more of them. */
		148
		149	static FT_Bool
		150	tt_check_trickyness_family( FT_String* name )
		151	{
		152
		153	#define TRICK_NAMES_MAX_CHARACTERS 16
		154	#define TRICK_NAMES_COUNT 8
		155
		156	static const char trick_names[TRICK_NAMES_COUNT]
		157	[TRICK_NAMES_MAX_CHARACTERS + 1] =
		158	{
		159	"DFKaiSho-SB", /* dfkaisb.ttf */
		160	"DFKaiShu",
		161	"DFKai-SB", /* kaiu.ttf */
		162	"HuaTianKaiTi?", /* htkt2.ttf */
		163	"HuaTianSongTi?", /* htst3.ttf */
		164	"MingLiU", /* mingliu.ttf & mingliu.ttc */
		165	"PMingLiU", /* mingliu.ttc */
		166	"MingLi43", /* mingli.ttf */
		167	};
		168
		169	int nn;
		170
		171
		172	for ( nn = 0; nn < TRICK_NAMES_COUNT; nn++ )
		173	if ( ft_strstr( name, trick_names[nn] ) )
		174	return TRUE;
		175
		176	return FALSE;
		177	}
		178
		179
		180	/* XXX: This function should be in the `sfnt' module. */
		181
		182	/* Some PDF generators clear the checksums in the TrueType header table. */
		183	/* For example, Quartz ContextPDF clears all entries, or Bullzip PDF */
		184	/* Printer clears the entries for subsetted subtables. We thus have to */
		185	/* recalculate the checksums where necessary. */
		186
		187	static FT_UInt32
		188	tt_synth_sfnt_checksum( FT_Stream stream,
		189	FT_ULong length )
		190	{
		191	FT_Error error;
		192	FT_UInt32 checksum = 0;
		193	int i;
		194
		195
		196	if ( FT_FRAME_ENTER( length ) )
		197	return 0;
		198
		199	for ( ; length > 3; length -= 4 )
		200	checksum += (FT_UInt32)FT_GET_ULONG();
		201
		202	for ( i = 3; length > 0; length --, i-- )
		203	checksum += (FT_UInt32)( FT_GET_BYTE() << ( i * 8 ) );
		204
		205	FT_FRAME_EXIT();
		206
		207	return checksum;
		208	}
		209
		210
		211	/* XXX: This function should be in the `sfnt' module. */
		212
		213	static FT_ULong
		214	tt_get_sfnt_checksum( TT_Face face,
		215	FT_UShort i )
		216	{
		217	#if 0 /* if we believe the written value, use following part. */
		218	if ( face->dir_tables[i].CheckSum )
		219	return face->dir_tables[i].CheckSum;
		220	#endif
		221
		222	if ( !face->goto_table )
		223	return 0;
		224
		225	if ( face->goto_table( face,
		226	face->dir_tables[i].Tag,
		227	face->root.stream,
		228	NULL ) )
		229	return 0;
		230
		231	return (FT_ULong)tt_synth_sfnt_checksum( face->root.stream,
		232	face->dir_tables[i].Length );
		233	}
		234
		235
		236	typedef struct tt_sfnt_id_rec_
		237	{
		238	FT_ULong CheckSum;
		239	FT_ULong Length;
		240
		241	} tt_sfnt_id_rec;
		242
		243
		244	static FT_Bool
		245	tt_check_trickyness_sfnt_ids( TT_Face face )
		246	{
		247	#define TRICK_SFNT_IDS_PER_FACE 3
		248	#define TRICK_SFNT_IDS_NUM_FACES 17
		249
		250	static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES]
		251	[TRICK_SFNT_IDS_PER_FACE] = {
		252
		253	#define TRICK_SFNT_ID_cvt 0
		254	#define TRICK_SFNT_ID_fpgm 1
		255	#define TRICK_SFNT_ID_prep 2
		256
		257	{ /* MingLiU 1995 */
		258	{ 0x05bcf058, 0x000002e4 }, /* cvt */
		259	{ 0x28233bf1, 0x000087c4 }, /* fpgm */
		260	{ 0xa344a1ea, 0x000001e1 } /* prep */
		261	},
		262	{ /* MingLiU 1996- */
		263	{ 0x05bcf058, 0x000002e4 }, /* cvt */
		264	{ 0x28233bf1, 0x000087c4 }, /* fpgm */
		265	{ 0xa344a1eb, 0x000001e1 } /* prep */
		266	},
		267	{ /* DFKaiShu */
		268	{ 0x11e5ead4, 0x00000350 }, /* cvt */
		269	{ 0x5a30ca3b, 0x00009063 }, /* fpgm */
		270	{ 0x13a42602, 0x0000007e } /* prep */
		271	},
		272	{ /* HuaTianKaiTi */
		273	{ 0xfffbfffc, 0x00000008 }, /* cvt */
		274	{ 0x9c9e48b8, 0x0000bea2 }, /* fpgm */
		275	{ 0x70020112, 0x00000008 } /* prep */
		276	},
		277	{ /* HuaTianSongTi */
		278	{ 0xfffbfffc, 0x00000008 }, /* cvt */
		279	{ 0x0a5a0483, 0x00017c39 }, /* fpgm */
		280	{ 0x70020112, 0x00000008 } /* prep */
		281	},
		282	{ /* NEC fadpop7.ttf */
		283	{ 0x00000000, 0x00000000 }, /* cvt */
		284	{ 0x40c92555, 0x000000e5 }, /* fpgm */
		285	{ 0xa39b58e3, 0x0000117c } /* prep */
		286	},
		287	{ /* NEC fadrei5.ttf */
		288	{ 0x00000000, 0x00000000 }, /* cvt */
		289	{ 0x33c41652, 0x000000e5 }, /* fpgm */
		290	{ 0x26d6c52a, 0x00000f6a } /* prep */
		291	},
		292	{ /* NEC fangot7.ttf */
		293	{ 0x00000000, 0x00000000 }, /* cvt */
		294	{ 0x6db1651d, 0x0000019d }, /* fpgm */
		295	{ 0x6c6e4b03, 0x00002492 } /* prep */
		296	},
		297	{ /* NEC fangyo5.ttf */
		298	{ 0x00000000, 0x00000000 }, /* cvt */
		299	{ 0x40c92555, 0x000000e5 }, /* fpgm */
		300	{ 0xde51fad0, 0x0000117c } /* prep */
		301	},
		302	{ /* NEC fankyo5.ttf */
		303	{ 0x00000000, 0x00000000 }, /* cvt */
		304	{ 0x85e47664, 0x000000e5 }, /* fpgm */
		305	{ 0xa6c62831, 0x00001caa } /* prep */
		306	},
		307	{ /* NEC fanrgo5.ttf */
		308	{ 0x00000000, 0x00000000 }, /* cvt */
		309	{ 0x2d891cfd, 0x0000019d }, /* fpgm */
		310	{ 0xa0604633, 0x00001de8 } /* prep */
		311	},
		312	{ /* NEC fangot5.ttc */
		313	{ 0x00000000, 0x00000000 }, /* cvt */
		314	{ 0x40aa774c, 0x000001cb }, /* fpgm */
		315	{ 0x9b5caa96, 0x00001f9a } /* prep */
		316	},
		317	{ /* NEC fanmin3.ttc */
		318	{ 0x00000000, 0x00000000 }, /* cvt */
		319	{ 0x0d3de9cb, 0x00000141 }, /* fpgm */
		320	{ 0xd4127766, 0x00002280 } /* prep */
		321	},
		322	{ /* NEC FA-Gothic, 1996 */
		323	{ 0x00000000, 0x00000000 }, /* cvt */
		324	{ 0x4a692698, 0x000001f0 }, /* fpgm */
		325	{ 0x340d4346, 0x00001fca } /* prep */
		326	},
		327	{ /* NEC FA-Minchou, 1996 */
		328	{ 0x00000000, 0x00000000 }, /* cvt */
		329	{ 0xcd34c604, 0x00000166 }, /* fpgm */
		330	{ 0x6cf31046, 0x000022b0 } /* prep */
		331	},
		332	{ /* NEC FA-RoundGothicB, 1996 */
		333	{ 0x00000000, 0x00000000 }, /* cvt */
		334	{ 0x5da75315, 0x0000019d }, /* fpgm */
		335	{ 0x40745a5f, 0x000022e0 } /* prep */
		336	},
		337	{ /* NEC FA-RoundGothicM, 1996 */
		338	{ 0x00000000, 0x00000000 }, /* cvt */
		339	{ 0xf055fc48, 0x000001c2 }, /* fpgm */
		340	{ 0x3900ded3, 0x00001e18 } /* prep */
		341	}
		342	};
		343
		344	FT_ULong checksum;
		345	int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
		346	FT_Bool has_cvt, has_fpgm, has_prep;
		347	FT_UShort i;
		348	int j, k;
		349
		350
		351	FT_MEM_SET( num_matched_ids, 0,
		352	sizeof ( int ) * TRICK_SFNT_IDS_NUM_FACES );
		353	has_cvt = FALSE;
		354	has_fpgm = FALSE;
		355	has_prep = FALSE;
		356
		357	for ( i = 0; i < face->num_tables; i++ )
		358	{
		359	checksum = 0;
		360
		361	switch( face->dir_tables[i].Tag )
		362	{
		363	case TTAG_cvt:
		364	k = TRICK_SFNT_ID_cvt;
		365	has_cvt = TRUE;
		366	break;
		367
		368	case TTAG_fpgm:
		369	k = TRICK_SFNT_ID_fpgm;
		370	has_fpgm = TRUE;
		371	break;
		372
		373	case TTAG_prep:
		374	k = TRICK_SFNT_ID_prep;
		375	has_prep = TRUE;
		376	break;
		377
		378	default:
		379	continue;
		380	}
		381
		382	for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
		383	if ( face->dir_tables[i].Length == sfnt_id[j][k].Length )
		384	{
		385	if ( !checksum )
		386	checksum = tt_get_sfnt_checksum( face, i );
		387
		388	if ( sfnt_id[j][k].CheckSum == checksum )
		389	num_matched_ids[j]++;
		390
		391	if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
		392	return TRUE;
		393	}
		394	}
		395
		396	for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
		397	{
		398	if ( !has_cvt && !sfnt_id[j][TRICK_SFNT_ID_cvt].Length )
		399	num_matched_ids[j] ++;
		400	if ( !has_fpgm && !sfnt_id[j][TRICK_SFNT_ID_fpgm].Length )
		401	num_matched_ids[j] ++;
		402	if ( !has_prep && !sfnt_id[j][TRICK_SFNT_ID_prep].Length )
		403	num_matched_ids[j] ++;
		404	if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
		405	return TRUE;
		406	}
		407
		408	return FALSE;
		409	}
		410
		411
		412	static FT_Bool
		413	tt_check_trickyness( FT_Face face )
		414	{
		415	if ( !face )
		416	return FALSE;
		417
		418	/* For first, check the face name for quick check. */
		419	if ( face->family_name &&
		420	tt_check_trickyness_family( face->family_name ) )
		421	return TRUE;
		422
		423	/* Type42 fonts may lack `name' tables, we thus try to identify */
		424	/* tricky fonts by checking the checksums of Type42-persistent */
		425	/* sfnt tables (`cvt', `fpgm', and `prep'). */
		426	if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) )
		427	return TRUE;
		428
		429	return FALSE;
		430	}
		431
		432
		433	/* Check whether `.notdef' is the only glyph in the `loca' table. */
		434	static FT_Bool
		435	tt_check_single_notdef( FT_Face ttface )
		436	{
		437	FT_Bool result = FALSE;
		438
		439	TT_Face face = (TT_Face)ttface;
		440	FT_UInt asize;
		441	FT_ULong i;
		442	FT_ULong glyph_index = 0;
		443	FT_UInt count = 0;
		444
		445
		446	for( i = 0; i < face->num_locations; i++ )
		447	{
		448	tt_face_get_location( face, i, &asize );
		449	if ( asize > 0 )
		450	{
		451	count += 1;
		452	if ( count > 1 )
		453	break;
		454	glyph_index = i;
		455	}
		456	}
		457
		458	/* Only have a single outline. */
		459	if ( count == 1 )
		460	{
		461	if ( glyph_index == 0 )
		462	result = TRUE;
		463	else
		464	{
		465	/* FIXME: Need to test glyphname == .notdef ? */
		466	FT_Error error;
		467	char buf[8];
		468
		469
		470	error = FT_Get_Glyph_Name( ttface, glyph_index, buf, 8 );
		471	if ( !error &&
		472	buf[0] == '.' && !ft_strncmp( buf, ".notdef", 8 ) )
		473	result = TRUE;
		474	}
		475	}
		476
		477	return result;
		478	}
		479
		480
		481	/*************************************************************************/
		482	/* */
		483	/* */
		484	/* tt_face_init */
		485	/* */
		486	/* */
		487	/* Initialize a given TrueType face object. */
		488	/* */
		489	/* */
		490	/* stream :: The source font stream. */
		491	/* */
		492	/* face_index :: The index of the font face in the resource. */
		493	/* */
		494	/* num_params :: Number of additional generic parameters. Ignored. */
		495	/* */
		496	/* params :: Additional generic parameters. Ignored. */
		497	/* */
		498	/* */
		499	/* face :: The newly built face object. */
		500	/* */
		501	/* */
		502	/* FreeType error code. 0 means success. */
		503	/* */
		504	FT_LOCAL_DEF( FT_Error )
		505	tt_face_init( FT_Stream stream,
		506	FT_Face ttface, /* TT_Face */
		507	FT_Int face_index,
		508	FT_Int num_params,
		509	FT_Parameter* params )
		510	{
		511	FT_Error error;
		512	FT_Library library;
		513	SFNT_Service sfnt;
		514	TT_Face face = (TT_Face)ttface;
		515
		516
		517	FT_TRACE2(( "TTF driver\n" ));
		518
		519	library = ttface->driver->root.library;
		520
		521	sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
		522	if ( !sfnt )
		523	{
		524	FT_ERROR(( "tt_face_init: cannot access `sfnt' module\n" ));
		525	error = FT_THROW( Missing_Module );
		526	goto Exit;
		527	}
		528
		529	/* create input stream from resource */
		530	if ( FT_STREAM_SEEK( 0 ) )
		531	goto Exit;
		532
		533	/* check that we have a valid TrueType file */
		534	error = sfnt->init_face( stream, face, face_index, num_params, params );
		535	if ( error )
		536	goto Exit;
		537
		538	/* We must also be able to accept Mac/GX fonts, as well as OT ones. */
		539	/* The 0x00020000 tag is completely undocumented; some fonts from */
		540	/* Arphic made for Chinese Windows 3.1 have this. */
		541	if ( face->format_tag != 0x00010000L && /* MS fonts */
		542	face->format_tag != 0x00020000L && /* CJK fonts for Win 3.1 */
		543	face->format_tag != TTAG_true ) /* Mac fonts */
		544	{
		545	FT_TRACE2(( " not a TTF font\n" ));
		546	goto Bad_Format;
		547	}
		548
		549	#ifdef TT_USE_BYTECODE_INTERPRETER
		550	ttface->face_flags \|= FT_FACE_FLAG_HINTER;
		551	#endif
		552
		553	/* If we are performing a simple font format check, exit immediately. */
		554	if ( face_index < 0 )
		555	return FT_Err_Ok;
		556
		557	/* Load font directory */
		558	error = sfnt->load_face( stream, face, face_index, num_params, params );
		559	if ( error )
		560	goto Exit;
		561
		562	if ( tt_check_trickyness( ttface ) )
		563	ttface->face_flags \|= FT_FACE_FLAG_TRICKY;
		564
		565	error = tt_face_load_hdmx( face, stream );
		566	if ( error )
		567	goto Exit;
		568
		569	if ( FT_IS_SCALABLE( ttface ) )
		570	{
		571
		572	#ifdef FT_CONFIG_OPTION_INCREMENTAL
		573
		574	if ( !ttface->internal->incremental_interface )
		575	error = tt_face_load_loca( face, stream );
		576	if ( !error )
		577	error = tt_face_load_cvt( face, stream );
		578	if ( !error )
		579	error = tt_face_load_fpgm( face, stream );
		580	if ( !error )
		581	error = tt_face_load_prep( face, stream );
		582
		583	/* Check the scalable flag based on `loca'. */
		584	if ( !ttface->internal->incremental_interface &&
		585	ttface->num_fixed_sizes &&
		586	face->glyph_locations &&
		587	tt_check_single_notdef( ttface ) )
		588	{
		589	FT_TRACE5(( "tt_face_init:"
		590	" Only the `.notdef' glyph has an outline.\n"
		591	" "
		592	" Resetting scalable flag to FALSE.\n" ));
		593
		594	ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
		595	}
		596
		597	#else
		598
		599	if ( !error )
		600	error = tt_face_load_loca( face, stream );
		601	if ( !error )
		602	error = tt_face_load_cvt( face, stream );
		603	if ( !error )
		604	error = tt_face_load_fpgm( face, stream );
		605	if ( !error )
		606	error = tt_face_load_prep( face, stream );
		607
		608	/* Check the scalable flag based on `loca'. */
		609	if ( ttface->num_fixed_sizes &&
		610	face->glyph_locations &&
		611	tt_check_single_notdef( ttface ) )
		612	{
		613	FT_TRACE5(( "tt_face_init:"
		614	" Only the `.notdef' glyph has an outline.\n"
		615	" "
		616	" Resetting scalable flag to FALSE.\n" ));
		617
		618	ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
		619	}
		620
		621	#endif
		622
		623	}
		624
		625	#if defined( TT_CONFIG_OPTION_UNPATENTED_HINTING ) && \
		626	!defined( TT_CONFIG_OPTION_BYTECODE_INTERPRETER )
		627
		628	{
		629	FT_Bool unpatented_hinting;
		630	int i;
		631
		632
		633	/* Determine whether unpatented hinting is to be used for this face. */
		634	unpatented_hinting = FT_BOOL
		635	( library->debug_hooks[FT_DEBUG_HOOK_UNPATENTED_HINTING] != NULL );
		636
		637	for ( i = 0; i < num_params && !face->unpatented_hinting; i++ )
		638	if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING )
		639	unpatented_hinting = TRUE;
		640
		641	if ( !unpatented_hinting )
		642	ttface->internal->ignore_unpatented_hinter = TRUE;
		643	}
		644
		645	#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING &&
		646	!TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
		647
		648	/* initialize standard glyph loading routines */
		649	TT_Init_Glyph_Loading( face );
		650
		651	Exit:
		652	return error;
		653
		654	Bad_Format:
		655	error = FT_THROW( Unknown_File_Format );
		656	goto Exit;
		657	}
		658
		659
		660	/*************************************************************************/
		661	/* */
		662	/* */
		663	/* tt_face_done */
		664	/* */
		665	/* */
		666	/* Finalize a given face object. */
		667	/* */
		668	/* */
		669	/* face :: A pointer to the face object to destroy. */
		670	/* */
		671	FT_LOCAL_DEF( void )
		672	tt_face_done( FT_Face ttface ) /* TT_Face */
		673	{
		674	TT_Face face = (TT_Face)ttface;
		675	FT_Memory memory;
		676	FT_Stream stream;
		677	SFNT_Service sfnt;
		678
		679
		680	if ( !face )
		681	return;
		682
		683	memory = ttface->memory;
		684	stream = ttface->stream;
		685	sfnt = (SFNT_Service)face->sfnt;
		686
		687	/* for `extended TrueType formats' (i.e. compressed versions) */
		688	if ( face->extra.finalizer )
		689	face->extra.finalizer( face->extra.data );
		690
		691	if ( sfnt )
		692	sfnt->done_face( face );
		693
		694	/* freeing the locations table */
		695	tt_face_done_loca( face );
		696
		697	tt_face_free_hdmx( face );
		698
		699	/* freeing the CVT */
		700	FT_FREE( face->cvt );
		701	face->cvt_size = 0;
		702
		703	/* freeing the programs */
		704	FT_FRAME_RELEASE( face->font_program );
		705	FT_FRAME_RELEASE( face->cvt_program );
		706	face->font_program_size = 0;
		707	face->cvt_program_size = 0;
		708
		709	#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
		710	tt_done_blend( memory, face->blend );
		711	face->blend = NULL;
		712	#endif
		713	}
		714
		715
		716	/*************************************************************************/
		717	/* */
		718	/* SIZE FUNCTIONS */
		719	/* */
		720	/*************************************************************************/
		721
		722	#ifdef TT_USE_BYTECODE_INTERPRETER
		723
		724	/*************************************************************************/
		725	/* */
		726	/* */
		727	/* tt_size_run_fpgm */
		728	/* */
		729	/* */
		730	/* Run the font program. */
		731	/* */
		732	/* */
		733	/* size :: A handle to the size object. */
		734	/* */
		735	/* pedantic :: Set if bytecode execution should be pedantic. */
		736	/* */
		737	/* */
		738	/* FreeType error code. 0 means success. */
		739	/* */
		740	FT_LOCAL_DEF( FT_Error )
		741	tt_size_run_fpgm( TT_Size size,
		742	FT_Bool pedantic )
		743	{
		744	TT_Face face = (TT_Face)size->root.face;
		745	TT_ExecContext exec;
		746	FT_Error error;
		747
		748
		749	/* debugging instances have their own context */
		750	if ( size->debug )
		751	exec = size->context;
		752	else
		753	exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
		754
		755	if ( !exec )
		756	return FT_THROW( Could_Not_Find_Context );
		757
		758	TT_Load_Context( exec, face, size );
		759
		760	exec->callTop = 0;
		761	exec->top = 0;
		762
		763	exec->period = 64;
		764	exec->phase = 0;
		765	exec->threshold = 0;
		766
		767	exec->instruction_trap = FALSE;
		768	exec->F_dot_P = 0x4000L;
		769
		770	exec->pedantic_hinting = pedantic;
		771
		772	{
		773	FT_Size_Metrics* metrics = &exec->metrics;
		774	TT_Size_Metrics* tt_metrics = &exec->tt_metrics;
		775
		776
		777	metrics->x_ppem = 0;
		778	metrics->y_ppem = 0;
		779	metrics->x_scale = 0;
		780	metrics->y_scale = 0;
		781
		782	tt_metrics->ppem = 0;
		783	tt_metrics->scale = 0;
		784	tt_metrics->ratio = 0x10000L;
		785	}
		786
		787	/* allow font program execution */
		788	TT_Set_CodeRange( exec,
		789	tt_coderange_font,
		790	face->font_program,
		791	face->font_program_size );
		792
		793	/* disable CVT and glyph programs coderange */
		794	TT_Clear_CodeRange( exec, tt_coderange_cvt );
		795	TT_Clear_CodeRange( exec, tt_coderange_glyph );
		796
		797	if ( face->font_program_size > 0 )
		798	{
		799	error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 );
		800
		801	if ( !error )
		802	{
		803	FT_TRACE4(( "Executing `fpgm' table.\n" ));
		804
		805	error = face->interpreter( exec );
		806	}
		807	}
		808	else
		809	error = FT_Err_Ok;
		810
		811	if ( !error )
		812	TT_Save_Context( exec, size );
		813
		814	return error;
		815	}
		816
		817
		818	/*************************************************************************/
		819	/* */
		820	/* */
		821	/* tt_size_run_prep */
		822	/* */
		823	/* */
		824	/* Run the control value program. */
		825	/* */
		826	/* */
		827	/* size :: A handle to the size object. */
		828	/* */
		829	/* pedantic :: Set if bytecode execution should be pedantic. */
		830	/* */
		831	/* */
		832	/* FreeType error code. 0 means success. */
		833	/* */
		834	FT_LOCAL_DEF( FT_Error )
		835	tt_size_run_prep( TT_Size size,
		836	FT_Bool pedantic )
		837	{
		838	TT_Face face = (TT_Face)size->root.face;
		839	TT_ExecContext exec;
		840	FT_Error error;
		841
		842
		843	/* debugging instances have their own context */
		844	if ( size->debug )
		845	exec = size->context;
		846	else
		847	exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
		848
		849	if ( !exec )
		850	return FT_THROW( Could_Not_Find_Context );
		851
		852	TT_Load_Context( exec, face, size );
		853
		854	exec->callTop = 0;
		855	exec->top = 0;
		856
		857	exec->instruction_trap = FALSE;
		858
		859	exec->pedantic_hinting = pedantic;
		860
		861	TT_Set_CodeRange( exec,
		862	tt_coderange_cvt,
		863	face->cvt_program,
		864	face->cvt_program_size );
		865
		866	TT_Clear_CodeRange( exec, tt_coderange_glyph );
		867
		868	if ( face->cvt_program_size > 0 )
		869	{
		870	error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
		871
		872	if ( !error && !size->debug )
		873	{
		874	FT_TRACE4(( "Executing `prep' table.\n" ));
		875
		876	error = face->interpreter( exec );
		877	}
		878	}
		879	else
		880	error = FT_Err_Ok;
		881
		882	/* UNDOCUMENTED! The MS rasterizer doesn't allow the following */
		883	/* graphics state variables to be modified by the CVT program. */
		884
		885	exec->GS.dualVector.x = 0x4000;
		886	exec->GS.dualVector.y = 0;
		887	exec->GS.projVector.x = 0x4000;
		888	exec->GS.projVector.y = 0x0;
		889	exec->GS.freeVector.x = 0x4000;
		890	exec->GS.freeVector.y = 0x0;
		891
		892	exec->GS.rp0 = 0;
		893	exec->GS.rp1 = 0;
		894	exec->GS.rp2 = 0;
		895
		896	exec->GS.gep0 = 1;
		897	exec->GS.gep1 = 1;
		898	exec->GS.gep2 = 1;
		899
		900	exec->GS.loop = 1;
		901
		902	/* save as default graphics state */
		903	size->GS = exec->GS;
		904
		905	TT_Save_Context( exec, size );
		906
		907	return error;
		908	}
		909
		910	#endif /* TT_USE_BYTECODE_INTERPRETER */
		911
		912
		913	#ifdef TT_USE_BYTECODE_INTERPRETER
		914
		915	static void
		916	tt_size_done_bytecode( FT_Size ftsize )
		917	{
		918	TT_Size size = (TT_Size)ftsize;
		919	TT_Face face = (TT_Face)ftsize->face;
		920	FT_Memory memory = face->root.memory;
		921
		922
		923	if ( size->debug )
		924	{
		925	/* the debug context must be deleted by the debugger itself */
		926	size->context = NULL;
		927	size->debug = FALSE;
		928	}
		929
		930	FT_FREE( size->cvt );
		931	size->cvt_size = 0;
		932
		933	/* free storage area */
		934	FT_FREE( size->storage );
		935	size->storage_size = 0;
		936
		937	/* twilight zone */
		938	tt_glyphzone_done( &size->twilight );
		939
		940	FT_FREE( size->function_defs );
		941	FT_FREE( size->instruction_defs );
		942
		943	size->num_function_defs = 0;
		944	size->max_function_defs = 0;
		945	size->num_instruction_defs = 0;
		946	size->max_instruction_defs = 0;
		947
		948	size->max_func = 0;
		949	size->max_ins = 0;
		950
		951	size->bytecode_ready = 0;
		952	size->cvt_ready = 0;
		953	}
		954
		955
		956	/* Initialize bytecode-related fields in the size object. */
		957	/* We do this only if bytecode interpretation is really needed. */
		958	static FT_Error
		959	tt_size_init_bytecode( FT_Size ftsize,
		960	FT_Bool pedantic )
		961	{
		962	FT_Error error;
		963	TT_Size size = (TT_Size)ftsize;
		964	TT_Face face = (TT_Face)ftsize->face;
		965	FT_Memory memory = face->root.memory;
		966	FT_Int i;
		967
		968	FT_UShort n_twilight;
		969	TT_MaxProfile* maxp = &face->max_profile;
		970
		971
		972	size->bytecode_ready = 1;
		973	size->cvt_ready = 0;
		974
		975	size->max_function_defs = maxp->maxFunctionDefs;
		976	size->max_instruction_defs = maxp->maxInstructionDefs;
		977
		978	size->num_function_defs = 0;
		979	size->num_instruction_defs = 0;
		980
		981	size->max_func = 0;
		982	size->max_ins = 0;
		983
		984	size->cvt_size = face->cvt_size;
		985	size->storage_size = maxp->maxStorage;
		986
		987	/* Set default metrics */
		988	{
		989	TT_Size_Metrics* metrics = &size->ttmetrics;
		990
		991
		992	metrics->rotated = FALSE;
		993	metrics->stretched = FALSE;
		994
		995	/* set default compensation (all 0) */
		996	for ( i = 0; i < 4; i++ )
		997	metrics->compensations[i] = 0;
		998	}
		999
		1000	/* allocate function defs, instruction defs, cvt, and storage area */
		1001	if ( FT_NEW_ARRAY( size->function_defs, size->max_function_defs ) \|\|
		1002	FT_NEW_ARRAY( size->instruction_defs, size->max_instruction_defs ) \|\|
		1003	FT_NEW_ARRAY( size->cvt, size->cvt_size ) \|\|
		1004	FT_NEW_ARRAY( size->storage, size->storage_size ) )
		1005	goto Exit;
		1006
		1007	/* reserve twilight zone */
		1008	n_twilight = maxp->maxTwilightPoints;
		1009
		1010	/* there are 4 phantom points (do we need this?) */
		1011	n_twilight += 4;
		1012
		1013	error = tt_glyphzone_new( memory, n_twilight, 0, &size->twilight );
		1014	if ( error )
		1015	goto Exit;
		1016
		1017	size->twilight.n_points = n_twilight;
		1018
		1019	size->GS = tt_default_graphics_state;
		1020
		1021	/* set `face->interpreter' according to the debug hook present */
		1022	{
		1023	FT_Library library = face->root.driver->root.library;
		1024
		1025
		1026	face->interpreter = (TT_Interpreter)
		1027	library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE];
		1028	if ( !face->interpreter )
		1029	face->interpreter = (TT_Interpreter)TT_RunIns;
		1030	}
		1031
		1032	/* Fine, now run the font program! */
		1033	error = tt_size_run_fpgm( size, pedantic );
		1034
		1035	Exit:
		1036	if ( error )
		1037	tt_size_done_bytecode( ftsize );
		1038
		1039	return error;
		1040	}
		1041
		1042
		1043	FT_LOCAL_DEF( FT_Error )
		1044	tt_size_ready_bytecode( TT_Size size,
		1045	FT_Bool pedantic )
		1046	{
		1047	FT_Error error = FT_Err_Ok;
		1048
		1049
		1050	if ( !size->bytecode_ready )
		1051	{
		1052	error = tt_size_init_bytecode( (FT_Size)size, pedantic );
		1053	if ( error )
		1054	goto Exit;
		1055	}
		1056
		1057	/* rescale CVT when needed */
		1058	if ( !size->cvt_ready )
		1059	{
		1060	FT_UInt i;
		1061	TT_Face face = (TT_Face)size->root.face;
		1062
		1063
		1064	/* Scale the cvt values to the new ppem. */
		1065	/* We use by default the y ppem to scale the CVT. */
		1066	for ( i = 0; i < size->cvt_size; i++ )
		1067	size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
		1068
		1069	/* all twilight points are originally zero */
		1070	for ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ )
		1071	{
		1072	size->twilight.org[i].x = 0;
		1073	size->twilight.org[i].y = 0;
		1074	size->twilight.cur[i].x = 0;
		1075	size->twilight.cur[i].y = 0;
		1076	}
		1077
		1078	/* clear storage area */
		1079	for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
		1080	size->storage[i] = 0;
		1081
		1082	size->GS = tt_default_graphics_state;
		1083
		1084	error = tt_size_run_prep( size, pedantic );
		1085	if ( !error )
		1086	size->cvt_ready = 1;
		1087	}
		1088
		1089	Exit:
		1090	return error;
		1091	}
		1092
		1093	#endif /* TT_USE_BYTECODE_INTERPRETER */
		1094
		1095
		1096	/*************************************************************************/
		1097	/* */
		1098	/* */
		1099	/* tt_size_init */
		1100	/* */
		1101	/* */
		1102	/* Initialize a new TrueType size object. */
		1103	/* */
		1104	/* */
		1105	/* size :: A handle to the size object. */
		1106	/* */
		1107	/* */
		1108	/* FreeType error code. 0 means success. */
		1109	/* */
		1110	FT_LOCAL_DEF( FT_Error )
		1111	tt_size_init( FT_Size ttsize ) /* TT_Size */
		1112	{
		1113	TT_Size size = (TT_Size)ttsize;
		1114	FT_Error error = FT_Err_Ok;
		1115
		1116	#ifdef TT_USE_BYTECODE_INTERPRETER
		1117	size->bytecode_ready = 0;
		1118	size->cvt_ready = 0;
		1119	#endif
		1120
		1121	size->ttmetrics.valid = FALSE;
		1122	size->strike_index = 0xFFFFFFFFUL;
		1123
		1124	return error;
		1125	}
		1126
		1127
		1128	/*************************************************************************/
		1129	/* */
		1130	/* */
		1131	/* tt_size_done */
		1132	/* */
		1133	/* */
		1134	/* The TrueType size object finalizer. */
		1135	/* */
		1136	/* */
		1137	/* size :: A handle to the target size object. */
		1138	/* */
		1139	FT_LOCAL_DEF( void )
		1140	tt_size_done( FT_Size ttsize ) /* TT_Size */
		1141	{
		1142	TT_Size size = (TT_Size)ttsize;
		1143
		1144
		1145	#ifdef TT_USE_BYTECODE_INTERPRETER
		1146	if ( size->bytecode_ready )
		1147	tt_size_done_bytecode( ttsize );
		1148	#endif
		1149
		1150	size->ttmetrics.valid = FALSE;
		1151	}
		1152
		1153
		1154	/*************************************************************************/
		1155	/* */
		1156	/* */
		1157	/* tt_size_reset */
		1158	/* */
		1159	/* */
		1160	/* Reset a TrueType size when resolutions and character dimensions */
		1161	/* have been changed. */
		1162	/* */
		1163	/* */
		1164	/* size :: A handle to the target size object. */
		1165	/* */
		1166	FT_LOCAL_DEF( FT_Error )
		1167	tt_size_reset( TT_Size size )
		1168	{
		1169	TT_Face face;
		1170	FT_Error error = FT_Err_Ok;
		1171	FT_Size_Metrics* metrics;
		1172
		1173
		1174	size->ttmetrics.valid = FALSE;
		1175
		1176	face = (TT_Face)size->root.face;
		1177
		1178	metrics = &size->metrics;
		1179
		1180	/* copy the result from base layer */
		1181	*metrics = size->root.metrics;
		1182
		1183	if ( metrics->x_ppem < 1 \|\| metrics->y_ppem < 1 )
		1184	return FT_THROW( Invalid_PPem );
		1185
		1186	/* This bit flag, if set, indicates that the ppems must be */
		1187	/* rounded to integers. Nearly all TrueType fonts have this bit */
		1188	/* set, as hinting won't work really well otherwise. */
		1189	/* */
		1190	if ( face->header.Flags & 8 )
		1191	{
		1192	metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
		1193	face->root.units_per_EM );
		1194	metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
		1195	face->root.units_per_EM );
		1196
		1197	metrics->ascender =
		1198	FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) );
		1199	metrics->descender =
		1200	FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) );
		1201	metrics->height =
		1202	FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) );
		1203	metrics->max_advance =
		1204	FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width,
		1205	metrics->x_scale ) );
		1206	}
		1207
		1208	/* compute new transformation */
		1209	if ( metrics->x_ppem >= metrics->y_ppem )
		1210	{
		1211	size->ttmetrics.scale = metrics->x_scale;
		1212	size->ttmetrics.ppem = metrics->x_ppem;
		1213	size->ttmetrics.x_ratio = 0x10000L;
		1214	size->ttmetrics.y_ratio = FT_DivFix( metrics->y_ppem,
		1215	metrics->x_ppem );
		1216	}
		1217	else
		1218	{
		1219	size->ttmetrics.scale = metrics->y_scale;
		1220	size->ttmetrics.ppem = metrics->y_ppem;
		1221	size->ttmetrics.x_ratio = FT_DivFix( metrics->x_ppem,
		1222	metrics->y_ppem );
		1223	size->ttmetrics.y_ratio = 0x10000L;
		1224	}
		1225
		1226	#ifdef TT_USE_BYTECODE_INTERPRETER
		1227	size->cvt_ready = 0;
		1228	#endif /* TT_USE_BYTECODE_INTERPRETER */
		1229
		1230	if ( !error )
		1231	size->ttmetrics.valid = TRUE;
		1232
		1233	return error;
		1234	}
		1235
		1236
		1237	/*************************************************************************/
		1238	/* */
		1239	/* */
		1240	/* tt_driver_init */
		1241	/* */
		1242	/* */
		1243	/* Initialize a given TrueType driver object. */
		1244	/* */
		1245	/* */
		1246	/* driver :: A handle to the target driver object. */
		1247	/* */
		1248	/* */
		1249	/* FreeType error code. 0 means success. */
		1250	/* */
		1251	FT_LOCAL_DEF( FT_Error )
		1252	tt_driver_init( FT_Module ttdriver ) /* TT_Driver */
		1253	{
		1254
		1255	#ifdef TT_USE_BYTECODE_INTERPRETER
		1256
		1257	TT_Driver driver = (TT_Driver)ttdriver;
		1258
		1259
		1260	if ( !TT_New_Context( driver ) )
		1261	return FT_THROW( Could_Not_Find_Context );
		1262
		1263	#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
		1264	driver->interpreter_version = TT_INTERPRETER_VERSION_38;
		1265	#else
		1266	driver->interpreter_version = TT_INTERPRETER_VERSION_35;
		1267	#endif
		1268
		1269	#else /* !TT_USE_BYTECODE_INTERPRETER */
		1270
		1271	FT_UNUSED( ttdriver );
		1272
		1273	#endif /* !TT_USE_BYTECODE_INTERPRETER */
		1274
		1275	return FT_Err_Ok;
		1276	}
		1277
		1278
		1279	/*************************************************************************/
		1280	/* */
		1281	/* */
		1282	/* tt_driver_done */
		1283	/* */
		1284	/* */
		1285	/* Finalize a given TrueType driver. */
		1286	/* */
		1287	/* */
		1288	/* driver :: A handle to the target TrueType driver. */
		1289	/* */
		1290	FT_LOCAL_DEF( void )
		1291	tt_driver_done( FT_Module ttdriver ) /* TT_Driver */
		1292	{
		1293	#ifdef TT_USE_BYTECODE_INTERPRETER
		1294	TT_Driver driver = (TT_Driver)ttdriver;
		1295
		1296
		1297	/* destroy the execution context */
		1298	if ( driver->context )
		1299	{
		1300	TT_Done_Context( driver->context );
		1301	driver->context = NULL;
		1302	}
		1303	#else
		1304	FT_UNUSED( ttdriver );
		1305	#endif
		1306
		1307	}
		1308
		1309
		1310	/*************************************************************************/
		1311	/* */
		1312	/* */
		1313	/* tt_slot_init */
		1314	/* */
		1315	/* */
		1316	/* Initialize a new slot object. */
		1317	/* */
		1318	/* */
		1319	/* slot :: A handle to the slot object. */
		1320	/* */
		1321	/* */
		1322	/* FreeType error code. 0 means success. */
		1323	/* */
		1324	FT_LOCAL_DEF( FT_Error )
		1325	tt_slot_init( FT_GlyphSlot slot )
		1326	{
		1327	return FT_GlyphLoader_CreateExtra( slot->internal->loader );
		1328	}
		1329
		1330
		1331	/* END */

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(root)/programs/develop/libraries/freetype/src/truetype/ttobjs.c – Rev 3918