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/***************************************************************************/
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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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208 |
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209 |
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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 ( face->dir_tables[i].CheckSum )
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return face->dir_tables[i].CheckSum;
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else if ( !face->goto_table )
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return 0;
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else 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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231 |
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232 |
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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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239 |
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240 |
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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 5
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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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249 |
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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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};
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280 |
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FT_ULong checksum;
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int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
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int i, j, k;
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284 |
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285 |
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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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288 |
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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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292 |
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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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break;
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298 |
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299 |
case TTAG_fpgm:
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k = TRICK_SFNT_ID_fpgm;
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break;
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302 |
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case TTAG_prep:
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k = TRICK_SFNT_ID_prep;
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break;
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306 |
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default:
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308 |
continue;
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309 |
}
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310 |
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311 |
for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ )
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312 |
if ( face->dir_tables[i].Length == sfnt_id[j][k].Length )
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313 |
{
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314 |
if ( !checksum )
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315 |
checksum = tt_get_sfnt_checksum( face, i );
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316 |
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317 |
if ( sfnt_id[j][k].CheckSum == checksum )
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318 |
num_matched_ids[j]++;
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319 |
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320 |
if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE )
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321 |
return TRUE;
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322 |
}
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323 |
}
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324 |
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325 |
return FALSE;
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326 |
}
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327 |
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328 |
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329 |
static FT_Bool
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330 |
tt_check_trickyness( FT_Face face )
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331 |
{
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332 |
if ( !face )
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333 |
return FALSE;
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334 |
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335 |
/* First, check the face name. */
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336 |
if ( face->family_name )
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337 |
{
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338 |
if ( tt_check_trickyness_family( face->family_name ) )
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339 |
return TRUE;
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340 |
else
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341 |
return FALSE;
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342 |
}
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343 |
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344 |
/* Type42 fonts may lack `name' tables, we thus try to identify */
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345 |
/* tricky fonts by checking the checksums of Type42-persistent */
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346 |
/* sfnt tables (`cvt', `fpgm', and `prep'). */
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347 |
if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) )
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348 |
return TRUE;
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349 |
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350 |
return FALSE;
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351 |
}
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352 |
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353 |
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354 |
/*************************************************************************/
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355 |
/* */
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356 |
/* <Function> */
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357 |
/* tt_face_init */
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358 |
/* */
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359 |
/* <Description> */
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360 |
/* Initialize a given TrueType face object. */
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361 |
/* */
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362 |
/* <Input> */
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363 |
/* stream :: The source font stream. */
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364 |
/* */
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365 |
/* face_index :: The index of the font face in the resource. */
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366 |
/* */
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367 |
/* num_params :: Number of additional generic parameters. Ignored. */
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368 |
/* */
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369 |
/* params :: Additional generic parameters. Ignored. */
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370 |
/* */
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371 |
/* <InOut> */
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372 |
/* face :: The newly built face object. */
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373 |
/* */
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374 |
/* <Return> */
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375 |
/* FreeType error code. 0 means success. */
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376 |
/* */
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377 |
FT_LOCAL_DEF( FT_Error )
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378 |
tt_face_init( FT_Stream stream,
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|
379 |
FT_Face ttface, /* TT_Face */
|
|
|
380 |
FT_Int face_index,
|
|
|
381 |
FT_Int num_params,
|
|
|
382 |
FT_Parameter* params )
|
|
|
383 |
{
|
|
|
384 |
FT_Error error;
|
|
|
385 |
FT_Library library;
|
|
|
386 |
SFNT_Service sfnt;
|
|
|
387 |
TT_Face face = (TT_Face)ttface;
|
|
|
388 |
|
|
|
389 |
|
|
|
390 |
library = ttface->driver->root.library;
|
|
|
391 |
sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
|
|
|
392 |
if ( !sfnt )
|
|
|
393 |
goto Bad_Format;
|
|
|
394 |
|
|
|
395 |
/* create input stream from resource */
|
|
|
396 |
if ( FT_STREAM_SEEK( 0 ) )
|
|
|
397 |
goto Exit;
|
|
|
398 |
|
|
|
399 |
/* check that we have a valid TrueType file */
|
|
|
400 |
error = sfnt->init_face( stream, face, face_index, num_params, params );
|
|
|
401 |
if ( error )
|
|
|
402 |
goto Exit;
|
|
|
403 |
|
|
|
404 |
/* We must also be able to accept Mac/GX fonts, as well as OT ones. */
|
|
|
405 |
/* The 0x00020000 tag is completely undocumented; some fonts from */
|
|
|
406 |
/* Arphic made for Chinese Windows 3.1 have this. */
|
|
|
407 |
if ( face->format_tag != 0x00010000L && /* MS fonts */
|
|
|
408 |
face->format_tag != 0x00020000L && /* CJK fonts for Win 3.1 */
|
|
|
409 |
face->format_tag != TTAG_true ) /* Mac fonts */
|
|
|
410 |
{
|
|
|
411 |
FT_TRACE2(( "[not a valid TTF font]\n" ));
|
|
|
412 |
goto Bad_Format;
|
|
|
413 |
}
|
|
|
414 |
|
|
|
415 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
416 |
ttface->face_flags |= FT_FACE_FLAG_HINTER;
|
|
|
417 |
#endif
|
|
|
418 |
|
|
|
419 |
/* If we are performing a simple font format check, exit immediately. */
|
|
|
420 |
if ( face_index < 0 )
|
|
|
421 |
return TT_Err_Ok;
|
|
|
422 |
|
|
|
423 |
/* Load font directory */
|
|
|
424 |
error = sfnt->load_face( stream, face, face_index, num_params, params );
|
|
|
425 |
if ( error )
|
|
|
426 |
goto Exit;
|
|
|
427 |
|
|
|
428 |
if ( tt_check_trickyness( ttface ) )
|
|
|
429 |
ttface->face_flags |= FT_FACE_FLAG_TRICKY;
|
|
|
430 |
|
|
|
431 |
error = tt_face_load_hdmx( face, stream );
|
|
|
432 |
if ( error )
|
|
|
433 |
goto Exit;
|
|
|
434 |
|
|
|
435 |
if ( FT_IS_SCALABLE( ttface ) )
|
|
|
436 |
{
|
|
|
437 |
|
|
|
438 |
#ifdef FT_CONFIG_OPTION_INCREMENTAL
|
|
|
439 |
|
|
|
440 |
if ( !ttface->internal->incremental_interface )
|
|
|
441 |
error = tt_face_load_loca( face, stream );
|
|
|
442 |
if ( !error )
|
|
|
443 |
error = tt_face_load_cvt( face, stream );
|
|
|
444 |
if ( !error )
|
|
|
445 |
error = tt_face_load_fpgm( face, stream );
|
|
|
446 |
if ( !error )
|
|
|
447 |
error = tt_face_load_prep( face, stream );
|
|
|
448 |
|
|
|
449 |
#else
|
|
|
450 |
|
|
|
451 |
if ( !error )
|
|
|
452 |
error = tt_face_load_loca( face, stream );
|
|
|
453 |
if ( !error )
|
|
|
454 |
error = tt_face_load_cvt( face, stream );
|
|
|
455 |
if ( !error )
|
|
|
456 |
error = tt_face_load_fpgm( face, stream );
|
|
|
457 |
if ( !error )
|
|
|
458 |
error = tt_face_load_prep( face, stream );
|
|
|
459 |
|
|
|
460 |
#endif
|
|
|
461 |
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
#if defined( TT_CONFIG_OPTION_UNPATENTED_HINTING ) && \
|
|
|
465 |
!defined( TT_CONFIG_OPTION_BYTECODE_INTERPRETER )
|
|
|
466 |
|
|
|
467 |
{
|
|
|
468 |
FT_Bool unpatented_hinting;
|
|
|
469 |
int i;
|
|
|
470 |
|
|
|
471 |
|
|
|
472 |
/* Determine whether unpatented hinting is to be used for this face. */
|
|
|
473 |
unpatented_hinting = FT_BOOL
|
|
|
474 |
( library->debug_hooks[FT_DEBUG_HOOK_UNPATENTED_HINTING] != NULL );
|
|
|
475 |
|
|
|
476 |
for ( i = 0; i < num_params && !face->unpatented_hinting; i++ )
|
|
|
477 |
if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING )
|
|
|
478 |
unpatented_hinting = TRUE;
|
|
|
479 |
|
|
|
480 |
if ( !unpatented_hinting )
|
|
|
481 |
ttface->internal->ignore_unpatented_hinter = TRUE;
|
|
|
482 |
}
|
|
|
483 |
|
|
|
484 |
#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING &&
|
|
|
485 |
!TT_CONFIG_OPTION_BYTECODE_INTERPRETER */
|
|
|
486 |
|
|
|
487 |
/* initialize standard glyph loading routines */
|
|
|
488 |
TT_Init_Glyph_Loading( face );
|
|
|
489 |
|
|
|
490 |
Exit:
|
|
|
491 |
return error;
|
|
|
492 |
|
|
|
493 |
Bad_Format:
|
|
|
494 |
error = TT_Err_Unknown_File_Format;
|
|
|
495 |
goto Exit;
|
|
|
496 |
}
|
|
|
497 |
|
|
|
498 |
|
|
|
499 |
/*************************************************************************/
|
|
|
500 |
/* */
|
|
|
501 |
/* <Function> */
|
|
|
502 |
/* tt_face_done */
|
|
|
503 |
/* */
|
|
|
504 |
/* <Description> */
|
|
|
505 |
/* Finalize a given face object. */
|
|
|
506 |
/* */
|
|
|
507 |
/* <Input> */
|
|
|
508 |
/* face :: A pointer to the face object to destroy. */
|
|
|
509 |
/* */
|
|
|
510 |
FT_LOCAL_DEF( void )
|
|
|
511 |
tt_face_done( FT_Face ttface ) /* TT_Face */
|
|
|
512 |
{
|
|
|
513 |
TT_Face face = (TT_Face)ttface;
|
|
|
514 |
FT_Memory memory;
|
|
|
515 |
FT_Stream stream;
|
|
|
516 |
SFNT_Service sfnt;
|
|
|
517 |
|
|
|
518 |
|
|
|
519 |
if ( !face )
|
|
|
520 |
return;
|
|
|
521 |
|
|
|
522 |
memory = ttface->memory;
|
|
|
523 |
stream = ttface->stream;
|
|
|
524 |
sfnt = (SFNT_Service)face->sfnt;
|
|
|
525 |
|
|
|
526 |
/* for `extended TrueType formats' (i.e. compressed versions) */
|
|
|
527 |
if ( face->extra.finalizer )
|
|
|
528 |
face->extra.finalizer( face->extra.data );
|
|
|
529 |
|
|
|
530 |
if ( sfnt )
|
|
|
531 |
sfnt->done_face( face );
|
|
|
532 |
|
|
|
533 |
/* freeing the locations table */
|
|
|
534 |
tt_face_done_loca( face );
|
|
|
535 |
|
|
|
536 |
tt_face_free_hdmx( face );
|
|
|
537 |
|
|
|
538 |
/* freeing the CVT */
|
|
|
539 |
FT_FREE( face->cvt );
|
|
|
540 |
face->cvt_size = 0;
|
|
|
541 |
|
|
|
542 |
/* freeing the programs */
|
|
|
543 |
FT_FRAME_RELEASE( face->font_program );
|
|
|
544 |
FT_FRAME_RELEASE( face->cvt_program );
|
|
|
545 |
face->font_program_size = 0;
|
|
|
546 |
face->cvt_program_size = 0;
|
|
|
547 |
|
|
|
548 |
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
|
|
|
549 |
tt_done_blend( memory, face->blend );
|
|
|
550 |
face->blend = NULL;
|
|
|
551 |
#endif
|
|
|
552 |
}
|
|
|
553 |
|
|
|
554 |
|
|
|
555 |
/*************************************************************************/
|
|
|
556 |
/* */
|
|
|
557 |
/* SIZE FUNCTIONS */
|
|
|
558 |
/* */
|
|
|
559 |
/*************************************************************************/
|
|
|
560 |
|
|
|
561 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
562 |
|
|
|
563 |
/*************************************************************************/
|
|
|
564 |
/* */
|
|
|
565 |
/* <Function> */
|
|
|
566 |
/* tt_size_run_fpgm */
|
|
|
567 |
/* */
|
|
|
568 |
/* <Description> */
|
|
|
569 |
/* Run the font program. */
|
|
|
570 |
/* */
|
|
|
571 |
/* <Input> */
|
|
|
572 |
/* size :: A handle to the size object. */
|
|
|
573 |
/* */
|
|
|
574 |
/* pedantic :: Set if bytecode execution should be pedantic. */
|
|
|
575 |
/* */
|
|
|
576 |
/* <Return> */
|
|
|
577 |
/* FreeType error code. 0 means success. */
|
|
|
578 |
/* */
|
|
|
579 |
FT_LOCAL_DEF( FT_Error )
|
|
|
580 |
tt_size_run_fpgm( TT_Size size,
|
|
|
581 |
FT_Bool pedantic )
|
|
|
582 |
{
|
|
|
583 |
TT_Face face = (TT_Face)size->root.face;
|
|
|
584 |
TT_ExecContext exec;
|
|
|
585 |
FT_Error error;
|
|
|
586 |
|
|
|
587 |
|
|
|
588 |
/* debugging instances have their own context */
|
|
|
589 |
if ( size->debug )
|
|
|
590 |
exec = size->context;
|
|
|
591 |
else
|
|
|
592 |
exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
|
|
|
593 |
|
|
|
594 |
if ( !exec )
|
|
|
595 |
return TT_Err_Could_Not_Find_Context;
|
|
|
596 |
|
|
|
597 |
TT_Load_Context( exec, face, size );
|
|
|
598 |
|
|
|
599 |
exec->callTop = 0;
|
|
|
600 |
exec->top = 0;
|
|
|
601 |
|
|
|
602 |
exec->period = 64;
|
|
|
603 |
exec->phase = 0;
|
|
|
604 |
exec->threshold = 0;
|
|
|
605 |
|
|
|
606 |
exec->instruction_trap = FALSE;
|
|
|
607 |
exec->F_dot_P = 0x10000L;
|
|
|
608 |
|
|
|
609 |
exec->pedantic_hinting = pedantic;
|
|
|
610 |
|
|
|
611 |
{
|
|
|
612 |
FT_Size_Metrics* metrics = &exec->metrics;
|
|
|
613 |
TT_Size_Metrics* tt_metrics = &exec->tt_metrics;
|
|
|
614 |
|
|
|
615 |
|
|
|
616 |
metrics->x_ppem = 0;
|
|
|
617 |
metrics->y_ppem = 0;
|
|
|
618 |
metrics->x_scale = 0;
|
|
|
619 |
metrics->y_scale = 0;
|
|
|
620 |
|
|
|
621 |
tt_metrics->ppem = 0;
|
|
|
622 |
tt_metrics->scale = 0;
|
|
|
623 |
tt_metrics->ratio = 0x10000L;
|
|
|
624 |
}
|
|
|
625 |
|
|
|
626 |
/* allow font program execution */
|
|
|
627 |
TT_Set_CodeRange( exec,
|
|
|
628 |
tt_coderange_font,
|
|
|
629 |
face->font_program,
|
|
|
630 |
face->font_program_size );
|
|
|
631 |
|
|
|
632 |
/* disable CVT and glyph programs coderange */
|
|
|
633 |
TT_Clear_CodeRange( exec, tt_coderange_cvt );
|
|
|
634 |
TT_Clear_CodeRange( exec, tt_coderange_glyph );
|
|
|
635 |
|
|
|
636 |
if ( face->font_program_size > 0 )
|
|
|
637 |
{
|
|
|
638 |
error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 );
|
|
|
639 |
|
|
|
640 |
if ( !error )
|
|
|
641 |
{
|
|
|
642 |
FT_TRACE4(( "Executing `fpgm' table.\n" ));
|
|
|
643 |
|
|
|
644 |
error = face->interpreter( exec );
|
|
|
645 |
}
|
|
|
646 |
}
|
|
|
647 |
else
|
|
|
648 |
error = TT_Err_Ok;
|
|
|
649 |
|
|
|
650 |
if ( !error )
|
|
|
651 |
TT_Save_Context( exec, size );
|
|
|
652 |
|
|
|
653 |
return error;
|
|
|
654 |
}
|
|
|
655 |
|
|
|
656 |
|
|
|
657 |
/*************************************************************************/
|
|
|
658 |
/* */
|
|
|
659 |
/* <Function> */
|
|
|
660 |
/* tt_size_run_prep */
|
|
|
661 |
/* */
|
|
|
662 |
/* <Description> */
|
|
|
663 |
/* Run the control value program. */
|
|
|
664 |
/* */
|
|
|
665 |
/* <Input> */
|
|
|
666 |
/* size :: A handle to the size object. */
|
|
|
667 |
/* */
|
|
|
668 |
/* pedantic :: Set if bytecode execution should be pedantic. */
|
|
|
669 |
/* */
|
|
|
670 |
/* <Return> */
|
|
|
671 |
/* FreeType error code. 0 means success. */
|
|
|
672 |
/* */
|
|
|
673 |
FT_LOCAL_DEF( FT_Error )
|
|
|
674 |
tt_size_run_prep( TT_Size size,
|
|
|
675 |
FT_Bool pedantic )
|
|
|
676 |
{
|
|
|
677 |
TT_Face face = (TT_Face)size->root.face;
|
|
|
678 |
TT_ExecContext exec;
|
|
|
679 |
FT_Error error;
|
|
|
680 |
|
|
|
681 |
|
|
|
682 |
/* debugging instances have their own context */
|
|
|
683 |
if ( size->debug )
|
|
|
684 |
exec = size->context;
|
|
|
685 |
else
|
|
|
686 |
exec = ( (TT_Driver)FT_FACE_DRIVER( face ) )->context;
|
|
|
687 |
|
|
|
688 |
if ( !exec )
|
|
|
689 |
return TT_Err_Could_Not_Find_Context;
|
|
|
690 |
|
|
|
691 |
TT_Load_Context( exec, face, size );
|
|
|
692 |
|
|
|
693 |
exec->callTop = 0;
|
|
|
694 |
exec->top = 0;
|
|
|
695 |
|
|
|
696 |
exec->instruction_trap = FALSE;
|
|
|
697 |
|
|
|
698 |
exec->pedantic_hinting = pedantic;
|
|
|
699 |
|
|
|
700 |
TT_Set_CodeRange( exec,
|
|
|
701 |
tt_coderange_cvt,
|
|
|
702 |
face->cvt_program,
|
|
|
703 |
face->cvt_program_size );
|
|
|
704 |
|
|
|
705 |
TT_Clear_CodeRange( exec, tt_coderange_glyph );
|
|
|
706 |
|
|
|
707 |
if ( face->cvt_program_size > 0 )
|
|
|
708 |
{
|
|
|
709 |
error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
|
|
|
710 |
|
|
|
711 |
if ( !error && !size->debug )
|
|
|
712 |
{
|
|
|
713 |
FT_TRACE4(( "Executing `prep' table.\n" ));
|
|
|
714 |
|
|
|
715 |
error = face->interpreter( exec );
|
|
|
716 |
}
|
|
|
717 |
}
|
|
|
718 |
else
|
|
|
719 |
error = TT_Err_Ok;
|
|
|
720 |
|
|
|
721 |
/* save as default graphics state */
|
|
|
722 |
size->GS = exec->GS;
|
|
|
723 |
|
|
|
724 |
TT_Save_Context( exec, size );
|
|
|
725 |
|
|
|
726 |
return error;
|
|
|
727 |
}
|
|
|
728 |
|
|
|
729 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
730 |
|
|
|
731 |
|
|
|
732 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
733 |
|
|
|
734 |
static void
|
|
|
735 |
tt_size_done_bytecode( FT_Size ftsize )
|
|
|
736 |
{
|
|
|
737 |
TT_Size size = (TT_Size)ftsize;
|
|
|
738 |
TT_Face face = (TT_Face)ftsize->face;
|
|
|
739 |
FT_Memory memory = face->root.memory;
|
|
|
740 |
|
|
|
741 |
|
|
|
742 |
if ( size->debug )
|
|
|
743 |
{
|
|
|
744 |
/* the debug context must be deleted by the debugger itself */
|
|
|
745 |
size->context = NULL;
|
|
|
746 |
size->debug = FALSE;
|
|
|
747 |
}
|
|
|
748 |
|
|
|
749 |
FT_FREE( size->cvt );
|
|
|
750 |
size->cvt_size = 0;
|
|
|
751 |
|
|
|
752 |
/* free storage area */
|
|
|
753 |
FT_FREE( size->storage );
|
|
|
754 |
size->storage_size = 0;
|
|
|
755 |
|
|
|
756 |
/* twilight zone */
|
|
|
757 |
tt_glyphzone_done( &size->twilight );
|
|
|
758 |
|
|
|
759 |
FT_FREE( size->function_defs );
|
|
|
760 |
FT_FREE( size->instruction_defs );
|
|
|
761 |
|
|
|
762 |
size->num_function_defs = 0;
|
|
|
763 |
size->max_function_defs = 0;
|
|
|
764 |
size->num_instruction_defs = 0;
|
|
|
765 |
size->max_instruction_defs = 0;
|
|
|
766 |
|
|
|
767 |
size->max_func = 0;
|
|
|
768 |
size->max_ins = 0;
|
|
|
769 |
|
|
|
770 |
size->bytecode_ready = 0;
|
|
|
771 |
size->cvt_ready = 0;
|
|
|
772 |
}
|
|
|
773 |
|
|
|
774 |
|
|
|
775 |
/* Initialize bytecode-related fields in the size object. */
|
|
|
776 |
/* We do this only if bytecode interpretation is really needed. */
|
|
|
777 |
static FT_Error
|
|
|
778 |
tt_size_init_bytecode( FT_Size ftsize,
|
|
|
779 |
FT_Bool pedantic )
|
|
|
780 |
{
|
|
|
781 |
FT_Error error;
|
|
|
782 |
TT_Size size = (TT_Size)ftsize;
|
|
|
783 |
TT_Face face = (TT_Face)ftsize->face;
|
|
|
784 |
FT_Memory memory = face->root.memory;
|
|
|
785 |
FT_Int i;
|
|
|
786 |
|
|
|
787 |
FT_UShort n_twilight;
|
|
|
788 |
TT_MaxProfile* maxp = &face->max_profile;
|
|
|
789 |
|
|
|
790 |
|
|
|
791 |
size->bytecode_ready = 1;
|
|
|
792 |
size->cvt_ready = 0;
|
|
|
793 |
|
|
|
794 |
size->max_function_defs = maxp->maxFunctionDefs;
|
|
|
795 |
size->max_instruction_defs = maxp->maxInstructionDefs;
|
|
|
796 |
|
|
|
797 |
size->num_function_defs = 0;
|
|
|
798 |
size->num_instruction_defs = 0;
|
|
|
799 |
|
|
|
800 |
size->max_func = 0;
|
|
|
801 |
size->max_ins = 0;
|
|
|
802 |
|
|
|
803 |
size->cvt_size = face->cvt_size;
|
|
|
804 |
size->storage_size = maxp->maxStorage;
|
|
|
805 |
|
|
|
806 |
/* Set default metrics */
|
|
|
807 |
{
|
|
|
808 |
TT_Size_Metrics* metrics = &size->ttmetrics;
|
|
|
809 |
|
|
|
810 |
|
|
|
811 |
metrics->rotated = FALSE;
|
|
|
812 |
metrics->stretched = FALSE;
|
|
|
813 |
|
|
|
814 |
/* set default compensation (all 0) */
|
|
|
815 |
for ( i = 0; i < 4; i++ )
|
|
|
816 |
metrics->compensations[i] = 0;
|
|
|
817 |
}
|
|
|
818 |
|
|
|
819 |
/* allocate function defs, instruction defs, cvt, and storage area */
|
|
|
820 |
if ( FT_NEW_ARRAY( size->function_defs, size->max_function_defs ) ||
|
|
|
821 |
FT_NEW_ARRAY( size->instruction_defs, size->max_instruction_defs ) ||
|
|
|
822 |
FT_NEW_ARRAY( size->cvt, size->cvt_size ) ||
|
|
|
823 |
FT_NEW_ARRAY( size->storage, size->storage_size ) )
|
|
|
824 |
goto Exit;
|
|
|
825 |
|
|
|
826 |
/* reserve twilight zone */
|
|
|
827 |
n_twilight = maxp->maxTwilightPoints;
|
|
|
828 |
|
|
|
829 |
/* there are 4 phantom points (do we need this?) */
|
|
|
830 |
n_twilight += 4;
|
|
|
831 |
|
|
|
832 |
error = tt_glyphzone_new( memory, n_twilight, 0, &size->twilight );
|
|
|
833 |
if ( error )
|
|
|
834 |
goto Exit;
|
|
|
835 |
|
|
|
836 |
size->twilight.n_points = n_twilight;
|
|
|
837 |
|
|
|
838 |
size->GS = tt_default_graphics_state;
|
|
|
839 |
|
|
|
840 |
/* set `face->interpreter' according to the debug hook present */
|
|
|
841 |
{
|
|
|
842 |
FT_Library library = face->root.driver->root.library;
|
|
|
843 |
|
|
|
844 |
|
|
|
845 |
face->interpreter = (TT_Interpreter)
|
|
|
846 |
library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE];
|
|
|
847 |
if ( !face->interpreter )
|
|
|
848 |
face->interpreter = (TT_Interpreter)TT_RunIns;
|
|
|
849 |
}
|
|
|
850 |
|
|
|
851 |
/* Fine, now run the font program! */
|
|
|
852 |
error = tt_size_run_fpgm( size, pedantic );
|
|
|
853 |
|
|
|
854 |
Exit:
|
|
|
855 |
if ( error )
|
|
|
856 |
tt_size_done_bytecode( ftsize );
|
|
|
857 |
|
|
|
858 |
return error;
|
|
|
859 |
}
|
|
|
860 |
|
|
|
861 |
|
|
|
862 |
FT_LOCAL_DEF( FT_Error )
|
|
|
863 |
tt_size_ready_bytecode( TT_Size size,
|
|
|
864 |
FT_Bool pedantic )
|
|
|
865 |
{
|
|
|
866 |
FT_Error error = TT_Err_Ok;
|
|
|
867 |
|
|
|
868 |
|
|
|
869 |
if ( !size->bytecode_ready )
|
|
|
870 |
{
|
|
|
871 |
error = tt_size_init_bytecode( (FT_Size)size, pedantic );
|
|
|
872 |
if ( error )
|
|
|
873 |
goto Exit;
|
|
|
874 |
}
|
|
|
875 |
|
|
|
876 |
/* rescale CVT when needed */
|
|
|
877 |
if ( !size->cvt_ready )
|
|
|
878 |
{
|
|
|
879 |
FT_UInt i;
|
|
|
880 |
TT_Face face = (TT_Face)size->root.face;
|
|
|
881 |
|
|
|
882 |
|
|
|
883 |
/* Scale the cvt values to the new ppem. */
|
|
|
884 |
/* We use by default the y ppem to scale the CVT. */
|
|
|
885 |
for ( i = 0; i < size->cvt_size; i++ )
|
|
|
886 |
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
|
|
|
887 |
|
|
|
888 |
/* all twilight points are originally zero */
|
|
|
889 |
for ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ )
|
|
|
890 |
{
|
|
|
891 |
size->twilight.org[i].x = 0;
|
|
|
892 |
size->twilight.org[i].y = 0;
|
|
|
893 |
size->twilight.cur[i].x = 0;
|
|
|
894 |
size->twilight.cur[i].y = 0;
|
|
|
895 |
}
|
|
|
896 |
|
|
|
897 |
/* clear storage area */
|
|
|
898 |
for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
|
|
|
899 |
size->storage[i] = 0;
|
|
|
900 |
|
|
|
901 |
size->GS = tt_default_graphics_state;
|
|
|
902 |
|
|
|
903 |
error = tt_size_run_prep( size, pedantic );
|
|
|
904 |
if ( !error )
|
|
|
905 |
size->cvt_ready = 1;
|
|
|
906 |
}
|
|
|
907 |
|
|
|
908 |
Exit:
|
|
|
909 |
return error;
|
|
|
910 |
}
|
|
|
911 |
|
|
|
912 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
913 |
|
|
|
914 |
|
|
|
915 |
/*************************************************************************/
|
|
|
916 |
/* */
|
|
|
917 |
/* <Function> */
|
|
|
918 |
/* tt_size_init */
|
|
|
919 |
/* */
|
|
|
920 |
/* <Description> */
|
|
|
921 |
/* Initialize a new TrueType size object. */
|
|
|
922 |
/* */
|
|
|
923 |
/* <InOut> */
|
|
|
924 |
/* size :: A handle to the size object. */
|
|
|
925 |
/* */
|
|
|
926 |
/* <Return> */
|
|
|
927 |
/* FreeType error code. 0 means success. */
|
|
|
928 |
/* */
|
|
|
929 |
FT_LOCAL_DEF( FT_Error )
|
|
|
930 |
tt_size_init( FT_Size ttsize ) /* TT_Size */
|
|
|
931 |
{
|
|
|
932 |
TT_Size size = (TT_Size)ttsize;
|
|
|
933 |
FT_Error error = TT_Err_Ok;
|
|
|
934 |
|
|
|
935 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
936 |
size->bytecode_ready = 0;
|
|
|
937 |
size->cvt_ready = 0;
|
|
|
938 |
#endif
|
|
|
939 |
|
|
|
940 |
size->ttmetrics.valid = FALSE;
|
|
|
941 |
size->strike_index = 0xFFFFFFFFUL;
|
|
|
942 |
|
|
|
943 |
return error;
|
|
|
944 |
}
|
|
|
945 |
|
|
|
946 |
|
|
|
947 |
/*************************************************************************/
|
|
|
948 |
/* */
|
|
|
949 |
/* <Function> */
|
|
|
950 |
/* tt_size_done */
|
|
|
951 |
/* */
|
|
|
952 |
/* <Description> */
|
|
|
953 |
/* The TrueType size object finalizer. */
|
|
|
954 |
/* */
|
|
|
955 |
/* <Input> */
|
|
|
956 |
/* size :: A handle to the target size object. */
|
|
|
957 |
/* */
|
|
|
958 |
FT_LOCAL_DEF( void )
|
|
|
959 |
tt_size_done( FT_Size ttsize ) /* TT_Size */
|
|
|
960 |
{
|
|
|
961 |
TT_Size size = (TT_Size)ttsize;
|
|
|
962 |
|
|
|
963 |
|
|
|
964 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
965 |
if ( size->bytecode_ready )
|
|
|
966 |
tt_size_done_bytecode( ttsize );
|
|
|
967 |
#endif
|
|
|
968 |
|
|
|
969 |
size->ttmetrics.valid = FALSE;
|
|
|
970 |
}
|
|
|
971 |
|
|
|
972 |
|
|
|
973 |
/*************************************************************************/
|
|
|
974 |
/* */
|
|
|
975 |
/* <Function> */
|
|
|
976 |
/* tt_size_reset */
|
|
|
977 |
/* */
|
|
|
978 |
/* <Description> */
|
|
|
979 |
/* Reset a TrueType size when resolutions and character dimensions */
|
|
|
980 |
/* have been changed. */
|
|
|
981 |
/* */
|
|
|
982 |
/* <Input> */
|
|
|
983 |
/* size :: A handle to the target size object. */
|
|
|
984 |
/* */
|
|
|
985 |
FT_LOCAL_DEF( FT_Error )
|
|
|
986 |
tt_size_reset( TT_Size size )
|
|
|
987 |
{
|
|
|
988 |
TT_Face face;
|
|
|
989 |
FT_Error error = TT_Err_Ok;
|
|
|
990 |
FT_Size_Metrics* metrics;
|
|
|
991 |
|
|
|
992 |
|
|
|
993 |
size->ttmetrics.valid = FALSE;
|
|
|
994 |
|
|
|
995 |
face = (TT_Face)size->root.face;
|
|
|
996 |
|
|
|
997 |
metrics = &size->metrics;
|
|
|
998 |
|
|
|
999 |
/* copy the result from base layer */
|
|
|
1000 |
*metrics = size->root.metrics;
|
|
|
1001 |
|
|
|
1002 |
if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
|
|
|
1003 |
return TT_Err_Invalid_PPem;
|
|
|
1004 |
|
|
|
1005 |
/* This bit flag, if set, indicates that the ppems must be */
|
|
|
1006 |
/* rounded to integers. Nearly all TrueType fonts have this bit */
|
|
|
1007 |
/* set, as hinting won't work really well otherwise. */
|
|
|
1008 |
/* */
|
|
|
1009 |
if ( face->header.Flags & 8 )
|
|
|
1010 |
{
|
|
|
1011 |
metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
|
|
|
1012 |
face->root.units_per_EM );
|
|
|
1013 |
metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
|
|
|
1014 |
face->root.units_per_EM );
|
|
|
1015 |
|
|
|
1016 |
metrics->ascender =
|
|
|
1017 |
FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) );
|
|
|
1018 |
metrics->descender =
|
|
|
1019 |
FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) );
|
|
|
1020 |
metrics->height =
|
|
|
1021 |
FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) );
|
|
|
1022 |
metrics->max_advance =
|
|
|
1023 |
FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width,
|
|
|
1024 |
metrics->x_scale ) );
|
|
|
1025 |
}
|
|
|
1026 |
|
|
|
1027 |
/* compute new transformation */
|
|
|
1028 |
if ( metrics->x_ppem >= metrics->y_ppem )
|
|
|
1029 |
{
|
|
|
1030 |
size->ttmetrics.scale = metrics->x_scale;
|
|
|
1031 |
size->ttmetrics.ppem = metrics->x_ppem;
|
|
|
1032 |
size->ttmetrics.x_ratio = 0x10000L;
|
|
|
1033 |
size->ttmetrics.y_ratio = FT_MulDiv( metrics->y_ppem,
|
|
|
1034 |
0x10000L,
|
|
|
1035 |
metrics->x_ppem );
|
|
|
1036 |
}
|
|
|
1037 |
else
|
|
|
1038 |
{
|
|
|
1039 |
size->ttmetrics.scale = metrics->y_scale;
|
|
|
1040 |
size->ttmetrics.ppem = metrics->y_ppem;
|
|
|
1041 |
size->ttmetrics.x_ratio = FT_MulDiv( metrics->x_ppem,
|
|
|
1042 |
0x10000L,
|
|
|
1043 |
metrics->y_ppem );
|
|
|
1044 |
size->ttmetrics.y_ratio = 0x10000L;
|
|
|
1045 |
}
|
|
|
1046 |
|
|
|
1047 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1048 |
size->cvt_ready = 0;
|
|
|
1049 |
#endif /* TT_USE_BYTECODE_INTERPRETER */
|
|
|
1050 |
|
|
|
1051 |
if ( !error )
|
|
|
1052 |
size->ttmetrics.valid = TRUE;
|
|
|
1053 |
|
|
|
1054 |
return error;
|
|
|
1055 |
}
|
|
|
1056 |
|
|
|
1057 |
|
|
|
1058 |
/*************************************************************************/
|
|
|
1059 |
/* */
|
|
|
1060 |
/* <Function> */
|
|
|
1061 |
/* tt_driver_init */
|
|
|
1062 |
/* */
|
|
|
1063 |
/* <Description> */
|
|
|
1064 |
/* Initialize a given TrueType driver object. */
|
|
|
1065 |
/* */
|
|
|
1066 |
/* <Input> */
|
|
|
1067 |
/* driver :: A handle to the target driver object. */
|
|
|
1068 |
/* */
|
|
|
1069 |
/* <Return> */
|
|
|
1070 |
/* FreeType error code. 0 means success. */
|
|
|
1071 |
/* */
|
|
|
1072 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1073 |
tt_driver_init( FT_Module ttdriver ) /* TT_Driver */
|
|
|
1074 |
{
|
|
|
1075 |
|
|
|
1076 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1077 |
|
|
|
1078 |
TT_Driver driver = (TT_Driver)ttdriver;
|
|
|
1079 |
|
|
|
1080 |
|
|
|
1081 |
if ( !TT_New_Context( driver ) )
|
|
|
1082 |
return TT_Err_Could_Not_Find_Context;
|
|
|
1083 |
|
|
|
1084 |
#else
|
|
|
1085 |
|
|
|
1086 |
FT_UNUSED( ttdriver );
|
|
|
1087 |
|
|
|
1088 |
#endif
|
|
|
1089 |
|
|
|
1090 |
return TT_Err_Ok;
|
|
|
1091 |
}
|
|
|
1092 |
|
|
|
1093 |
|
|
|
1094 |
/*************************************************************************/
|
|
|
1095 |
/* */
|
|
|
1096 |
/* <Function> */
|
|
|
1097 |
/* tt_driver_done */
|
|
|
1098 |
/* */
|
|
|
1099 |
/* <Description> */
|
|
|
1100 |
/* Finalize a given TrueType driver. */
|
|
|
1101 |
/* */
|
|
|
1102 |
/* <Input> */
|
|
|
1103 |
/* driver :: A handle to the target TrueType driver. */
|
|
|
1104 |
/* */
|
|
|
1105 |
FT_LOCAL_DEF( void )
|
|
|
1106 |
tt_driver_done( FT_Module ttdriver ) /* TT_Driver */
|
|
|
1107 |
{
|
|
|
1108 |
#ifdef TT_USE_BYTECODE_INTERPRETER
|
|
|
1109 |
TT_Driver driver = (TT_Driver)ttdriver;
|
|
|
1110 |
|
|
|
1111 |
|
|
|
1112 |
/* destroy the execution context */
|
|
|
1113 |
if ( driver->context )
|
|
|
1114 |
{
|
|
|
1115 |
TT_Done_Context( driver->context );
|
|
|
1116 |
driver->context = NULL;
|
|
|
1117 |
}
|
|
|
1118 |
#else
|
|
|
1119 |
FT_UNUSED( ttdriver );
|
|
|
1120 |
#endif
|
|
|
1121 |
|
|
|
1122 |
}
|
|
|
1123 |
|
|
|
1124 |
|
|
|
1125 |
/*************************************************************************/
|
|
|
1126 |
/* */
|
|
|
1127 |
/* <Function> */
|
|
|
1128 |
/* tt_slot_init */
|
|
|
1129 |
/* */
|
|
|
1130 |
/* <Description> */
|
|
|
1131 |
/* Initialize a new slot object. */
|
|
|
1132 |
/* */
|
|
|
1133 |
/* <InOut> */
|
|
|
1134 |
/* slot :: A handle to the slot object. */
|
|
|
1135 |
/* */
|
|
|
1136 |
/* <Return> */
|
|
|
1137 |
/* FreeType error code. 0 means success. */
|
|
|
1138 |
/* */
|
|
|
1139 |
FT_LOCAL_DEF( FT_Error )
|
|
|
1140 |
tt_slot_init( FT_GlyphSlot slot )
|
|
|
1141 |
{
|
|
|
1142 |
return FT_GlyphLoader_CreateExtra( slot->internal->loader );
|
|
|
1143 |
}
|
|
|
1144 |
|
|
|
1145 |
|
|
|
1146 |
/* END */
|