1287 lines
43 KiB
C
1287 lines
43 KiB
C
/***************************************************************************/
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/* */
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/* ttobjs.c */
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/* */
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/* Objects manager (body). */
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/* */
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/* Copyright 1996-2011 */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#include <ft2build.h>
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_TRUETYPE_TAGS_H
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#include FT_INTERNAL_SFNT_H
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#include "ttgload.h"
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#include "ttpload.h"
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#include "tterrors.h"
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#ifdef TT_USE_BYTECODE_INTERPRETER
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#include "ttinterp.h"
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#endif
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#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING
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#include FT_TRUETYPE_UNPATENTED_H
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#endif
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#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
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#include "ttgxvar.h"
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#endif
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_ttobjs
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#ifdef TT_USE_BYTECODE_INTERPRETER
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/*************************************************************************/
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/* */
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/* GLYPH ZONE FUNCTIONS */
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/* */
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/*************************************************************************/
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/*************************************************************************/
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/* */
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/* <Function> */
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/* tt_glyphzone_done */
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/* */
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/* <Description> */
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/* Deallocate a glyph zone. */
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/* */
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/* <Input> */
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/* zone :: A pointer to the target glyph zone. */
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/* */
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FT_LOCAL_DEF( void )
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tt_glyphzone_done( TT_GlyphZone zone )
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{
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FT_Memory memory = zone->memory;
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if ( memory )
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{
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FT_FREE( zone->contours );
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FT_FREE( zone->tags );
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FT_FREE( zone->cur );
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FT_FREE( zone->org );
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FT_FREE( zone->orus );
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zone->max_points = zone->n_points = 0;
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zone->max_contours = zone->n_contours = 0;
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zone->memory = NULL;
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}
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}
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/*************************************************************************/
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/* */
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/* <Function> */
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/* tt_glyphzone_new */
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/* */
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/* <Description> */
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/* Allocate a new glyph zone. */
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/* */
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/* <Input> */
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/* memory :: A handle to the current memory object. */
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/* */
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/* maxPoints :: The capacity of glyph zone in points. */
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/* */
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/* maxContours :: The capacity of glyph zone in contours. */
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/* */
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/* <Output> */
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/* zone :: A pointer to the target glyph zone record. */
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/* */
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/* <Return> */
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/* FreeType error code. 0 means success. */
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/* */
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FT_LOCAL_DEF( FT_Error )
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tt_glyphzone_new( FT_Memory memory,
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FT_UShort maxPoints,
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FT_Short maxContours,
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TT_GlyphZone zone )
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{
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FT_Error error;
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FT_MEM_ZERO( zone, sizeof ( *zone ) );
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zone->memory = memory;
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if ( FT_NEW_ARRAY( zone->org, maxPoints ) ||
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FT_NEW_ARRAY( zone->cur, maxPoints ) ||
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FT_NEW_ARRAY( zone->orus, maxPoints ) ||
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FT_NEW_ARRAY( zone->tags, maxPoints ) ||
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FT_NEW_ARRAY( zone->contours, maxContours ) )
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{
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tt_glyphzone_done( zone );
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}
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else
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{
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zone->max_points = maxPoints;
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zone->max_contours = maxContours;
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}
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return error;
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}
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#endif /* TT_USE_BYTECODE_INTERPRETER */
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/* Compare the face with a list of well-known `tricky' fonts. */
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/* This list shall be expanded as we find more of them. */
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static FT_Bool
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tt_check_trickyness_family( FT_String* name )
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{
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#define TRICK_NAMES_MAX_CHARACTERS 16
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#define TRICK_NAMES_COUNT 8
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static const char trick_names[TRICK_NAMES_COUNT]
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[TRICK_NAMES_MAX_CHARACTERS + 1] =
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{
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"DFKaiSho-SB", /* dfkaisb.ttf */
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"DFKaiShu",
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"DFKai-SB", /* kaiu.ttf */
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"HuaTianKaiTi?", /* htkt2.ttf */
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"HuaTianSongTi?", /* htst3.ttf */
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"MingLiU", /* mingliu.ttf & mingliu.ttc */
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"PMingLiU", /* mingliu.ttc */
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"MingLi43", /* mingli.ttf */
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};
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int nn;
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for ( nn = 0; nn < TRICK_NAMES_COUNT; nn++ )
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if ( ft_strstr( name, trick_names[nn] ) )
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return TRUE;
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return FALSE;
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}
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/* XXX: This function should be in the `sfnt' module. */
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/* Some PDF generators clear the checksums in the TrueType header table. */
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/* For example, Quartz ContextPDF clears all entries, or Bullzip PDF */
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/* Printer clears the entries for subsetted subtables. We thus have to */
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/* recalculate the checksums where necessary. */
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static FT_UInt32
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tt_synth_sfnt_checksum( FT_Stream stream,
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FT_ULong length )
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{
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FT_Error error;
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FT_UInt32 checksum = 0;
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int i;
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if ( FT_FRAME_ENTER( length ) )
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return 0;
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for ( ; length > 3; length -= 4 )
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checksum += (FT_UInt32)FT_GET_ULONG();
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for ( i = 3; length > 0; length --, i-- )
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checksum += (FT_UInt32)( FT_GET_BYTE() << ( i * 8 ) );
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FT_FRAME_EXIT();
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return checksum;
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}
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/* XXX: This function should be in the `sfnt' module. */
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static FT_ULong
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tt_get_sfnt_checksum( TT_Face face,
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FT_UShort i )
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{
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#if 0 /* if we believe the written value, use following part. */
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if ( face->dir_tables[i].CheckSum )
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return face->dir_tables[i].CheckSum;
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#endif
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if ( !face->goto_table )
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return 0;
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if ( face->goto_table( face,
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face->dir_tables[i].Tag,
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face->root.stream,
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NULL ) )
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return 0;
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return (FT_ULong)tt_synth_sfnt_checksum( face->root.stream,
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face->dir_tables[i].Length );
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}
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typedef struct tt_sfnt_id_rec_
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{
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FT_ULong CheckSum;
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FT_ULong Length;
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} tt_sfnt_id_rec;
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static FT_Bool
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tt_check_trickyness_sfnt_ids( TT_Face face )
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{
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#define TRICK_SFNT_IDS_PER_FACE 3
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#define TRICK_SFNT_IDS_NUM_FACES 13
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static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES]
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[TRICK_SFNT_IDS_PER_FACE] = {
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#define TRICK_SFNT_ID_cvt 0
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#define TRICK_SFNT_ID_fpgm 1
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#define TRICK_SFNT_ID_prep 2
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{ /* MingLiU 1995 */
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{ 0x05bcf058, 0x000002e4 }, /* cvt */
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{ 0x28233bf1, 0x000087c4 }, /* fpgm */
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{ 0xa344a1ea, 0x000001e1 } /* prep */
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},
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{ /* MingLiU 1996- */
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{ 0x05bcf058, 0x000002e4 }, /* cvt */
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{ 0x28233bf1, 0x000087c4 }, /* fpgm */
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{ 0xa344a1eb, 0x000001e1 } /* prep */
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},
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{ /* DFKaiShu */
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{ 0x11e5ead4, 0x00000350 }, /* cvt */
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{ 0x5a30ca3b, 0x00009063 }, /* fpgm */
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{ 0x13a42602, 0x0000007e } /* prep */
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},
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{ /* HuaTianKaiTi */
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{ 0xfffbfffc, 0x00000008 }, /* cvt */
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{ 0x9c9e48b8, 0x0000bea2 }, /* fpgm */
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{ 0x70020112, 0x00000008 } /* prep */
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},
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{ /* HuaTianSongTi */
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{ 0xfffbfffc, 0x00000008 }, /* cvt */
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{ 0x0a5a0483, 0x00017c39 }, /* fpgm */
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{ 0x70020112, 0x00000008 } /* prep */
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},
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{ /* NEC fadpop7.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x40c92555, 0x000000e5 }, /* fpgm */
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{ 0xa39b58e3, 0x0000117c } /* prep */
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},
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{ /* NEC fadrei5.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x33c41652, 0x000000e5 }, /* fpgm */
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{ 0x26d6c52a, 0x00000f6a } /* prep */
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},
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{ /* NEC fangot7.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x6db1651d, 0x0000019d }, /* fpgm */
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{ 0x6c6e4b03, 0x00002492 } /* prep */
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},
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{ /* NEC fangyo5.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x40c92555, 0x000000e5 }, /* fpgm */
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{ 0xde51fad0, 0x0000117c } /* prep */
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},
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{ /* NEC fankyo5.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x85e47664, 0x000000e5 }, /* fpgm */
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{ 0xa6c62831, 0x00001caa } /* prep */
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},
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{ /* NEC fanrgo5.ttf */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x2d891cfd, 0x0000019d }, /* fpgm */
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{ 0xa0604633, 0x00001de8 } /* prep */
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},
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{ /* NEC fangot5.ttc */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x40aa774c, 0x000001cb }, /* fpgm */
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{ 0x9b5caa96, 0x00001f9a } /* prep */
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},
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{ /* NEC fanmin3.ttc */
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{ 0x00000000, 0x00000000 }, /* cvt */
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{ 0x0d3de9cb, 0x00000141 }, /* fpgm */
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{ 0xd4127766, 0x00002280 } /* prep */
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}
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};
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FT_ULong checksum;
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int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
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FT_Bool has_cvt, has_fpgm, has_prep;
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FT_UShort i;
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int j, k;
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FT_MEM_SET( num_matched_ids, 0,
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sizeof ( int ) * TRICK_SFNT_IDS_NUM_FACES );
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has_cvt = FALSE;
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has_fpgm = FALSE;
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has_prep = FALSE;
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for ( i = 0; i < face->num_tables; i++ )
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{
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checksum = 0;
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switch( face->dir_tables[i].Tag )
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{
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case TTAG_cvt:
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k = TRICK_SFNT_ID_cvt;
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has_cvt = TRUE;
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break;
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case TTAG_fpgm:
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k = TRICK_SFNT_ID_fpgm;
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has_fpgm = TRUE;
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break;
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case TTAG_prep:
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k = TRICK_SFNT_ID_prep;
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has_prep = TRUE;
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break;
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default:
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continue;
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}
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for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
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if ( face->dir_tables[i].Length == sfnt_id[j][k].Length )
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{
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if ( !checksum )
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checksum = tt_get_sfnt_checksum( face, i );
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if ( sfnt_id[j][k].CheckSum == checksum )
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num_matched_ids[j]++;
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if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
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return TRUE;
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}
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}
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for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
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{
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if ( !has_cvt && !sfnt_id[j][TRICK_SFNT_ID_cvt].Length )
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num_matched_ids[j] ++;
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if ( !has_fpgm && !sfnt_id[j][TRICK_SFNT_ID_fpgm].Length )
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num_matched_ids[j] ++;
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if ( !has_prep && !sfnt_id[j][TRICK_SFNT_ID_prep].Length )
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num_matched_ids[j] ++;
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if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
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return TRUE;
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}
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return FALSE;
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}
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static FT_Bool
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tt_check_trickyness( FT_Face face )
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{
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if ( !face )
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return FALSE;
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|
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/* For first, check the face name for quick check. */
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if ( face->family_name &&
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tt_check_trickyness_family( face->family_name ) )
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return TRUE;
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|
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/* Type42 fonts may lack `name' tables, we thus try to identify */
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/* tricky fonts by checking the checksums of Type42-persistent */
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/* sfnt tables (`cvt', `fpgm', and `prep'). */
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if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) )
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return TRUE;
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return FALSE;
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}
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|
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/* Check whether `.notdef' is the only glyph in the `loca' table. */
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static FT_Bool
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tt_check_single_notdef( FT_Face ttface )
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{
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FT_Bool result = FALSE;
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TT_Face face = (TT_Face)ttface;
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FT_UInt asize;
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FT_ULong i;
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FT_ULong glyph_index = 0;
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FT_UInt count = 0;
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|
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for( i = 0; i < face->num_locations; i++ )
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{
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tt_face_get_location( face, i, &asize );
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if ( asize > 0 )
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{
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count += 1;
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if ( count > 1 )
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break;
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glyph_index = i;
|
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}
|
|
}
|
|
|
|
/* Only have a single outline. */
|
|
if ( count == 1 )
|
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{
|
|
if ( glyph_index == 0 )
|
|
result = TRUE;
|
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else
|
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{
|
|
/* FIXME: Need to test glyphname == .notdef ? */
|
|
FT_Error error;
|
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char buf[8];
|
|
|
|
|
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error = FT_Get_Glyph_Name( ttface, glyph_index, buf, 8 );
|
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if ( !error &&
|
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buf[0] == '.' && !ft_strncmp( buf, ".notdef", 8 ) )
|
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result = TRUE;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_init */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initialize a given TrueType face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* stream :: The source font stream. */
|
|
/* */
|
|
/* face_index :: The index of the font face in the resource. */
|
|
/* */
|
|
/* num_params :: Number of additional generic parameters. Ignored. */
|
|
/* */
|
|
/* params :: Additional generic parameters. Ignored. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* face :: The newly built face object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_face_init( FT_Stream stream,
|
|
FT_Face ttface, /* TT_Face */
|
|
FT_Int face_index,
|
|
FT_Int num_params,
|
|
FT_Parameter* params )
|
|
{
|
|
FT_Error error;
|
|
FT_Library library;
|
|
SFNT_Service sfnt;
|
|
TT_Face face = (TT_Face)ttface;
|
|
|
|
|
|
FT_TRACE2(( "TTF driver\n" ));
|
|
|
|
library = ttface->driver->root.library;
|
|
|
|
sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
|
|
if ( !sfnt )
|
|
{
|
|
FT_ERROR(( "tt_face_init: cannot access `sfnt' module\n" ));
|
|
error = TT_Err_Missing_Module;
|
|
goto Exit;
|
|
}
|
|
|
|
/* create input stream from resource */
|
|
if ( FT_STREAM_SEEK( 0 ) )
|
|
goto Exit;
|
|
|
|
/* check that we have a valid TrueType file */
|
|
error = sfnt->init_face( stream, face, face_index, num_params, params );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
/* We must also be able to accept Mac/GX fonts, as well as OT ones. */
|
|
/* The 0x00020000 tag is completely undocumented; some fonts from */
|
|
/* Arphic made for Chinese Windows 3.1 have this. */
|
|
if ( face->format_tag != 0x00010000L && /* MS fonts */
|
|
face->format_tag != 0x00020000L && /* CJK fonts for Win 3.1 */
|
|
face->format_tag != TTAG_true ) /* Mac fonts */
|
|
{
|
|
FT_TRACE2(( " not a TTF font\n" ));
|
|
goto Bad_Format;
|
|
}
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
ttface->face_flags |= FT_FACE_FLAG_HINTER;
|
|
#endif
|
|
|
|
/* If we are performing a simple font format check, exit immediately. */
|
|
if ( face_index < 0 )
|
|
return TT_Err_Ok;
|
|
|
|
/* Load font directory */
|
|
error = sfnt->load_face( stream, face, face_index, num_params, params );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( tt_check_trickyness( ttface ) )
|
|
ttface->face_flags |= FT_FACE_FLAG_TRICKY;
|
|
|
|
error = tt_face_load_hdmx( face, stream );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
if ( FT_IS_SCALABLE( ttface ) )
|
|
{
|
|
|
|
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
|
if ( !ttface->internal->incremental_interface )
|
|
error = tt_face_load_loca( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_cvt( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_fpgm( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_prep( face, stream );
|
|
|
|
/* Check the scalable flag based on `loca'. */
|
|
if ( !ttface->internal->incremental_interface &&
|
|
ttface->num_fixed_sizes &&
|
|
face->glyph_locations &&
|
|
tt_check_single_notdef( ttface ) )
|
|
{
|
|
FT_TRACE5(( "tt_face_init:"
|
|
" Only the `.notdef' glyph has an outline.\n"
|
|
" "
|
|
" Resetting scalable flag to FALSE.\n" ));
|
|
|
|
ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
|
|
}
|
|
|
|
#else
|
|
|
|
if ( !error )
|
|
error = tt_face_load_loca( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_cvt( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_fpgm( face, stream );
|
|
if ( !error )
|
|
error = tt_face_load_prep( face, stream );
|
|
|
|
/* Check the scalable flag based on `loca'. */
|
|
if ( ttface->num_fixed_sizes &&
|
|
face->glyph_locations &&
|
|
tt_check_single_notdef( ttface ) )
|
|
{
|
|
FT_TRACE5(( "tt_face_init:"
|
|
" Only the `.notdef' glyph has an outline.\n"
|
|
" "
|
|
" Resetting scalable flag to FALSE.\n" ));
|
|
|
|
ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
#if defined( TT_CONFIG_OPTION_UNPATENTED_HINTING ) && \
|
|
!defined( TT_CONFIG_OPTION_BYTECODE_INTERPRETER )
|
|
|
|
{
|
|
FT_Bool unpatented_hinting;
|
|
int i;
|
|
|
|
|
|
/* Determine whether unpatented hinting is to be used for this face. */
|
|
unpatented_hinting = FT_BOOL
|
|
( library->debug_hooks[FT_DEBUG_HOOK_UNPATENTED_HINTING] != NULL );
|
|
|
|
for ( i = 0; i < num_params && !face->unpatented_hinting; i++ )
|
|
if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING )
|
|
unpatented_hinting = TRUE;
|
|
|
|
if ( !unpatented_hinting )
|
|
ttface->internal->ignore_unpatented_hinter = TRUE;
|
|
}
|
|
|
|
#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING &&
|
|
!TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
|
|
|
|
/* initialize standard glyph loading routines */
|
|
TT_Init_Glyph_Loading( face );
|
|
|
|
Exit:
|
|
return error;
|
|
|
|
Bad_Format:
|
|
error = TT_Err_Unknown_File_Format;
|
|
goto Exit;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_face_done */
|
|
/* */
|
|
/* <Description> */
|
|
/* Finalize a given face object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* face :: A pointer to the face object to destroy. */
|
|
/* */
|
|
FT_LOCAL_DEF( void )
|
|
tt_face_done( FT_Face ttface ) /* TT_Face */
|
|
{
|
|
TT_Face face = (TT_Face)ttface;
|
|
FT_Memory memory;
|
|
FT_Stream stream;
|
|
SFNT_Service sfnt;
|
|
|
|
|
|
if ( !face )
|
|
return;
|
|
|
|
memory = ttface->memory;
|
|
stream = ttface->stream;
|
|
sfnt = (SFNT_Service)face->sfnt;
|
|
|
|
/* for `extended TrueType formats' (i.e. compressed versions) */
|
|
if ( face->extra.finalizer )
|
|
face->extra.finalizer( face->extra.data );
|
|
|
|
if ( sfnt )
|
|
sfnt->done_face( face );
|
|
|
|
/* freeing the locations table */
|
|
tt_face_done_loca( face );
|
|
|
|
tt_face_free_hdmx( face );
|
|
|
|
/* freeing the CVT */
|
|
FT_FREE( face->cvt );
|
|
face->cvt_size = 0;
|
|
|
|
/* freeing the programs */
|
|
FT_FRAME_RELEASE( face->font_program );
|
|
FT_FRAME_RELEASE( face->cvt_program );
|
|
face->font_program_size = 0;
|
|
face->cvt_program_size = 0;
|
|
|
|
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
tt_done_blend( memory, face->blend );
|
|
face->blend = NULL;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* SIZE FUNCTIONS */
|
|
/* */
|
|
/*************************************************************************/
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_size_run_fpgm */
|
|
/* */
|
|
/* <Description> */
|
|
/* Run the font program. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to the size object. */
|
|
/* */
|
|
/* pedantic :: Set if bytecode execution should be pedantic. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_size_run_fpgm( TT_Size size,
|
|
FT_Bool pedantic )
|
|
{
|
|
TT_Face face = (TT_Face)size->root.face;
|
|
TT_ExecContext exec;
|
|
FT_Error error;
|
|
|
|
|
|
/* debugging instances have their own context */
|
|
if ( size->debug )
|
|
exec = size->context;
|
|
else
|
|
exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
|
|
|
|
if ( !exec )
|
|
return TT_Err_Could_Not_Find_Context;
|
|
|
|
TT_Load_Context( exec, face, size );
|
|
|
|
exec->callTop = 0;
|
|
exec->top = 0;
|
|
|
|
exec->period = 64;
|
|
exec->phase = 0;
|
|
exec->threshold = 0;
|
|
|
|
exec->instruction_trap = FALSE;
|
|
exec->F_dot_P = 0x10000L;
|
|
|
|
exec->pedantic_hinting = pedantic;
|
|
|
|
{
|
|
FT_Size_Metrics* metrics = &exec->metrics;
|
|
TT_Size_Metrics* tt_metrics = &exec->tt_metrics;
|
|
|
|
|
|
metrics->x_ppem = 0;
|
|
metrics->y_ppem = 0;
|
|
metrics->x_scale = 0;
|
|
metrics->y_scale = 0;
|
|
|
|
tt_metrics->ppem = 0;
|
|
tt_metrics->scale = 0;
|
|
tt_metrics->ratio = 0x10000L;
|
|
}
|
|
|
|
/* allow font program execution */
|
|
TT_Set_CodeRange( exec,
|
|
tt_coderange_font,
|
|
face->font_program,
|
|
face->font_program_size );
|
|
|
|
/* disable CVT and glyph programs coderange */
|
|
TT_Clear_CodeRange( exec, tt_coderange_cvt );
|
|
TT_Clear_CodeRange( exec, tt_coderange_glyph );
|
|
|
|
if ( face->font_program_size > 0 )
|
|
{
|
|
error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 );
|
|
|
|
if ( !error )
|
|
{
|
|
FT_TRACE4(( "Executing `fpgm' table.\n" ));
|
|
|
|
error = face->interpreter( exec );
|
|
}
|
|
}
|
|
else
|
|
error = TT_Err_Ok;
|
|
|
|
if ( !error )
|
|
TT_Save_Context( exec, size );
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_size_run_prep */
|
|
/* */
|
|
/* <Description> */
|
|
/* Run the control value program. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to the size object. */
|
|
/* */
|
|
/* pedantic :: Set if bytecode execution should be pedantic. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_size_run_prep( TT_Size size,
|
|
FT_Bool pedantic )
|
|
{
|
|
TT_Face face = (TT_Face)size->root.face;
|
|
TT_ExecContext exec;
|
|
FT_Error error;
|
|
|
|
|
|
/* debugging instances have their own context */
|
|
if ( size->debug )
|
|
exec = size->context;
|
|
else
|
|
exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
|
|
|
|
if ( !exec )
|
|
return TT_Err_Could_Not_Find_Context;
|
|
|
|
TT_Load_Context( exec, face, size );
|
|
|
|
exec->callTop = 0;
|
|
exec->top = 0;
|
|
|
|
exec->instruction_trap = FALSE;
|
|
|
|
exec->pedantic_hinting = pedantic;
|
|
|
|
TT_Set_CodeRange( exec,
|
|
tt_coderange_cvt,
|
|
face->cvt_program,
|
|
face->cvt_program_size );
|
|
|
|
TT_Clear_CodeRange( exec, tt_coderange_glyph );
|
|
|
|
if ( face->cvt_program_size > 0 )
|
|
{
|
|
error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
|
|
|
|
if ( !error && !size->debug )
|
|
{
|
|
FT_TRACE4(( "Executing `prep' table.\n" ));
|
|
|
|
error = face->interpreter( exec );
|
|
}
|
|
}
|
|
else
|
|
error = TT_Err_Ok;
|
|
|
|
/* save as default graphics state */
|
|
size->GS = exec->GS;
|
|
|
|
TT_Save_Context( exec, size );
|
|
|
|
return error;
|
|
}
|
|
|
|
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
|
static void
|
|
tt_size_done_bytecode( FT_Size ftsize )
|
|
{
|
|
TT_Size size = (TT_Size)ftsize;
|
|
TT_Face face = (TT_Face)ftsize->face;
|
|
FT_Memory memory = face->root.memory;
|
|
|
|
|
|
if ( size->debug )
|
|
{
|
|
/* the debug context must be deleted by the debugger itself */
|
|
size->context = NULL;
|
|
size->debug = FALSE;
|
|
}
|
|
|
|
FT_FREE( size->cvt );
|
|
size->cvt_size = 0;
|
|
|
|
/* free storage area */
|
|
FT_FREE( size->storage );
|
|
size->storage_size = 0;
|
|
|
|
/* twilight zone */
|
|
tt_glyphzone_done( &size->twilight );
|
|
|
|
FT_FREE( size->function_defs );
|
|
FT_FREE( size->instruction_defs );
|
|
|
|
size->num_function_defs = 0;
|
|
size->max_function_defs = 0;
|
|
size->num_instruction_defs = 0;
|
|
size->max_instruction_defs = 0;
|
|
|
|
size->max_func = 0;
|
|
size->max_ins = 0;
|
|
|
|
size->bytecode_ready = 0;
|
|
size->cvt_ready = 0;
|
|
}
|
|
|
|
|
|
/* Initialize bytecode-related fields in the size object. */
|
|
/* We do this only if bytecode interpretation is really needed. */
|
|
static FT_Error
|
|
tt_size_init_bytecode( FT_Size ftsize,
|
|
FT_Bool pedantic )
|
|
{
|
|
FT_Error error;
|
|
TT_Size size = (TT_Size)ftsize;
|
|
TT_Face face = (TT_Face)ftsize->face;
|
|
FT_Memory memory = face->root.memory;
|
|
FT_Int i;
|
|
|
|
FT_UShort n_twilight;
|
|
TT_MaxProfile* maxp = &face->max_profile;
|
|
|
|
|
|
size->bytecode_ready = 1;
|
|
size->cvt_ready = 0;
|
|
|
|
size->max_function_defs = maxp->maxFunctionDefs;
|
|
size->max_instruction_defs = maxp->maxInstructionDefs;
|
|
|
|
size->num_function_defs = 0;
|
|
size->num_instruction_defs = 0;
|
|
|
|
size->max_func = 0;
|
|
size->max_ins = 0;
|
|
|
|
size->cvt_size = face->cvt_size;
|
|
size->storage_size = maxp->maxStorage;
|
|
|
|
/* Set default metrics */
|
|
{
|
|
TT_Size_Metrics* metrics = &size->ttmetrics;
|
|
|
|
|
|
metrics->rotated = FALSE;
|
|
metrics->stretched = FALSE;
|
|
|
|
/* set default compensation (all 0) */
|
|
for ( i = 0; i < 4; i++ )
|
|
metrics->compensations[i] = 0;
|
|
}
|
|
|
|
/* allocate function defs, instruction defs, cvt, and storage area */
|
|
if ( FT_NEW_ARRAY( size->function_defs, size->max_function_defs ) ||
|
|
FT_NEW_ARRAY( size->instruction_defs, size->max_instruction_defs ) ||
|
|
FT_NEW_ARRAY( size->cvt, size->cvt_size ) ||
|
|
FT_NEW_ARRAY( size->storage, size->storage_size ) )
|
|
goto Exit;
|
|
|
|
/* reserve twilight zone */
|
|
n_twilight = maxp->maxTwilightPoints;
|
|
|
|
/* there are 4 phantom points (do we need this?) */
|
|
n_twilight += 4;
|
|
|
|
error = tt_glyphzone_new( memory, n_twilight, 0, &size->twilight );
|
|
if ( error )
|
|
goto Exit;
|
|
|
|
size->twilight.n_points = n_twilight;
|
|
|
|
size->GS = tt_default_graphics_state;
|
|
|
|
/* set `face->interpreter' according to the debug hook present */
|
|
{
|
|
FT_Library library = face->root.driver->root.library;
|
|
|
|
|
|
face->interpreter = (TT_Interpreter)
|
|
library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE];
|
|
if ( !face->interpreter )
|
|
face->interpreter = (TT_Interpreter)TT_RunIns;
|
|
}
|
|
|
|
/* Fine, now run the font program! */
|
|
error = tt_size_run_fpgm( size, pedantic );
|
|
|
|
Exit:
|
|
if ( error )
|
|
tt_size_done_bytecode( ftsize );
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_size_ready_bytecode( TT_Size size,
|
|
FT_Bool pedantic )
|
|
{
|
|
FT_Error error = TT_Err_Ok;
|
|
|
|
|
|
if ( !size->bytecode_ready )
|
|
{
|
|
error = tt_size_init_bytecode( (FT_Size)size, pedantic );
|
|
if ( error )
|
|
goto Exit;
|
|
}
|
|
|
|
/* rescale CVT when needed */
|
|
if ( !size->cvt_ready )
|
|
{
|
|
FT_UInt i;
|
|
TT_Face face = (TT_Face)size->root.face;
|
|
|
|
|
|
/* Scale the cvt values to the new ppem. */
|
|
/* We use by default the y ppem to scale the CVT. */
|
|
for ( i = 0; i < size->cvt_size; i++ )
|
|
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
|
|
|
|
/* all twilight points are originally zero */
|
|
for ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ )
|
|
{
|
|
size->twilight.org[i].x = 0;
|
|
size->twilight.org[i].y = 0;
|
|
size->twilight.cur[i].x = 0;
|
|
size->twilight.cur[i].y = 0;
|
|
}
|
|
|
|
/* clear storage area */
|
|
for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
|
|
size->storage[i] = 0;
|
|
|
|
size->GS = tt_default_graphics_state;
|
|
|
|
error = tt_size_run_prep( size, pedantic );
|
|
if ( !error )
|
|
size->cvt_ready = 1;
|
|
}
|
|
|
|
Exit:
|
|
return error;
|
|
}
|
|
|
|
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_size_init */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initialize a new TrueType size object. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* size :: A handle to the size object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_size_init( FT_Size ttsize ) /* TT_Size */
|
|
{
|
|
TT_Size size = (TT_Size)ttsize;
|
|
FT_Error error = TT_Err_Ok;
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
size->bytecode_ready = 0;
|
|
size->cvt_ready = 0;
|
|
#endif
|
|
|
|
size->ttmetrics.valid = FALSE;
|
|
size->strike_index = 0xFFFFFFFFUL;
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_size_done */
|
|
/* */
|
|
/* <Description> */
|
|
/* The TrueType size object finalizer. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to the target size object. */
|
|
/* */
|
|
FT_LOCAL_DEF( void )
|
|
tt_size_done( FT_Size ttsize ) /* TT_Size */
|
|
{
|
|
TT_Size size = (TT_Size)ttsize;
|
|
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
if ( size->bytecode_ready )
|
|
tt_size_done_bytecode( ttsize );
|
|
#endif
|
|
|
|
size->ttmetrics.valid = FALSE;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_size_reset */
|
|
/* */
|
|
/* <Description> */
|
|
/* Reset a TrueType size when resolutions and character dimensions */
|
|
/* have been changed. */
|
|
/* */
|
|
/* <Input> */
|
|
/* size :: A handle to the target size object. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_size_reset( TT_Size size )
|
|
{
|
|
TT_Face face;
|
|
FT_Error error = TT_Err_Ok;
|
|
FT_Size_Metrics* metrics;
|
|
|
|
|
|
size->ttmetrics.valid = FALSE;
|
|
|
|
face = (TT_Face)size->root.face;
|
|
|
|
metrics = &size->metrics;
|
|
|
|
/* copy the result from base layer */
|
|
*metrics = size->root.metrics;
|
|
|
|
if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
|
|
return TT_Err_Invalid_PPem;
|
|
|
|
/* This bit flag, if set, indicates that the ppems must be */
|
|
/* rounded to integers. Nearly all TrueType fonts have this bit */
|
|
/* set, as hinting won't work really well otherwise. */
|
|
/* */
|
|
if ( face->header.Flags & 8 )
|
|
{
|
|
metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
|
|
face->root.units_per_EM );
|
|
metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
|
|
face->root.units_per_EM );
|
|
|
|
metrics->ascender =
|
|
FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) );
|
|
metrics->descender =
|
|
FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) );
|
|
metrics->height =
|
|
FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) );
|
|
metrics->max_advance =
|
|
FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width,
|
|
metrics->x_scale ) );
|
|
}
|
|
|
|
/* compute new transformation */
|
|
if ( metrics->x_ppem >= metrics->y_ppem )
|
|
{
|
|
size->ttmetrics.scale = metrics->x_scale;
|
|
size->ttmetrics.ppem = metrics->x_ppem;
|
|
size->ttmetrics.x_ratio = 0x10000L;
|
|
size->ttmetrics.y_ratio = FT_MulDiv( metrics->y_ppem,
|
|
0x10000L,
|
|
metrics->x_ppem );
|
|
}
|
|
else
|
|
{
|
|
size->ttmetrics.scale = metrics->y_scale;
|
|
size->ttmetrics.ppem = metrics->y_ppem;
|
|
size->ttmetrics.x_ratio = FT_MulDiv( metrics->x_ppem,
|
|
0x10000L,
|
|
metrics->y_ppem );
|
|
size->ttmetrics.y_ratio = 0x10000L;
|
|
}
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
size->cvt_ready = 0;
|
|
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
|
if ( !error )
|
|
size->ttmetrics.valid = TRUE;
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_driver_init */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initialize a given TrueType driver object. */
|
|
/* */
|
|
/* <Input> */
|
|
/* driver :: A handle to the target driver object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_driver_init( FT_Module ttdriver ) /* TT_Driver */
|
|
{
|
|
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
|
TT_Driver driver = (TT_Driver)ttdriver;
|
|
|
|
|
|
if ( !TT_New_Context( driver ) )
|
|
return TT_Err_Could_Not_Find_Context;
|
|
|
|
#else
|
|
|
|
FT_UNUSED( ttdriver );
|
|
|
|
#endif
|
|
|
|
return TT_Err_Ok;
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_driver_done */
|
|
/* */
|
|
/* <Description> */
|
|
/* Finalize a given TrueType driver. */
|
|
/* */
|
|
/* <Input> */
|
|
/* driver :: A handle to the target TrueType driver. */
|
|
/* */
|
|
FT_LOCAL_DEF( void )
|
|
tt_driver_done( FT_Module ttdriver ) /* TT_Driver */
|
|
{
|
|
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
TT_Driver driver = (TT_Driver)ttdriver;
|
|
|
|
|
|
/* destroy the execution context */
|
|
if ( driver->context )
|
|
{
|
|
TT_Done_Context( driver->context );
|
|
driver->context = NULL;
|
|
}
|
|
#else
|
|
FT_UNUSED( ttdriver );
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
/*************************************************************************/
|
|
/* */
|
|
/* <Function> */
|
|
/* tt_slot_init */
|
|
/* */
|
|
/* <Description> */
|
|
/* Initialize a new slot object. */
|
|
/* */
|
|
/* <InOut> */
|
|
/* slot :: A handle to the slot object. */
|
|
/* */
|
|
/* <Return> */
|
|
/* FreeType error code. 0 means success. */
|
|
/* */
|
|
FT_LOCAL_DEF( FT_Error )
|
|
tt_slot_init( FT_GlyphSlot slot )
|
|
{
|
|
return FT_GlyphLoader_CreateExtra( slot->internal->loader );
|
|
}
|
|
|
|
|
|
/* END */
|