| /**************************************************************************** |
| * |
| * ttobjs.c |
| * |
| * Objects manager (body). |
| * |
| * Copyright (C) 1996-2024 by |
| * David Turner, Robert Wilhelm, and Werner Lemberg. |
| * |
| * This file is part of the FreeType project, and may only be used, |
| * modified, and distributed under the terms of the FreeType project |
| * license, LICENSE.TXT. By continuing to use, modify, or distribute |
| * this file you indicate that you have read the license and |
| * understand and accept it fully. |
| * |
| */ |
| |
| |
| #include <freetype/internal/ftdebug.h> |
| #include <freetype/internal/ftstream.h> |
| #include <freetype/tttags.h> |
| #include <freetype/internal/sfnt.h> |
| #include <freetype/ftdriver.h> |
| |
| #include "ttgload.h" |
| #include "ttpload.h" |
| |
| #include "tterrors.h" |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| #include "ttinterp.h" |
| #endif |
| |
| #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT |
| #include "ttgxvar.h" |
| #endif |
| |
| /************************************************************************** |
| * |
| * The macro FT_COMPONENT is used in trace mode. It is an implicit |
| * parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log |
| * messages during execution. |
| */ |
| #undef FT_COMPONENT |
| #define FT_COMPONENT ttobjs |
| |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| |
| /************************************************************************** |
| * |
| * GLYPH ZONE FUNCTIONS |
| * |
| */ |
| |
| |
| /************************************************************************** |
| * |
| * @Function: |
| * tt_glyphzone_done |
| * |
| * @Description: |
| * Deallocate a glyph zone. |
| * |
| * @Input: |
| * zone :: |
| * A pointer to the target glyph zone. |
| */ |
| FT_LOCAL_DEF( void ) |
| tt_glyphzone_done( TT_GlyphZone zone ) |
| { |
| FT_Memory memory = zone->memory; |
| |
| |
| if ( memory ) |
| { |
| FT_FREE( zone->contours ); |
| FT_FREE( zone->tags ); |
| FT_FREE( zone->cur ); |
| FT_FREE( zone->org ); |
| FT_FREE( zone->orus ); |
| |
| zone->max_points = zone->n_points = 0; |
| zone->max_contours = zone->n_contours = 0; |
| zone->memory = NULL; |
| } |
| } |
| |
| |
| /************************************************************************** |
| * |
| * @Function: |
| * tt_glyphzone_new |
| * |
| * @Description: |
| * Allocate a new glyph zone. |
| * |
| * @Input: |
| * memory :: |
| * A handle to the current memory object. |
| * |
| * maxPoints :: |
| * The capacity of glyph zone in points. |
| * |
| * maxContours :: |
| * The capacity of glyph zone in contours. |
| * |
| * @Output: |
| * zone :: |
| * A pointer to the target glyph zone record. |
| * |
| * @Return: |
| * FreeType error code. 0 means success. |
| */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_glyphzone_new( FT_Memory memory, |
| FT_UShort maxPoints, |
| FT_Short maxContours, |
| TT_GlyphZone zone ) |
| { |
| FT_Error error; |
| |
| |
| FT_ZERO( zone ); |
| zone->memory = memory; |
| |
| if ( FT_NEW_ARRAY( zone->org, maxPoints ) || |
| FT_NEW_ARRAY( zone->cur, maxPoints ) || |
| FT_NEW_ARRAY( zone->orus, maxPoints ) || |
| FT_NEW_ARRAY( zone->tags, maxPoints ) || |
| FT_NEW_ARRAY( zone->contours, maxContours ) ) |
| { |
| tt_glyphzone_done( zone ); |
| } |
| else |
| { |
| zone->max_points = maxPoints; |
| zone->max_contours = maxContours; |
| } |
| |
| return error; |
| } |
| |
| |
| /* |
| * Fonts embedded in PDFs are made unique by prepending randomization |
| * prefixes to their names: as defined in Section 5.5.3, 'Font Subsets', |
| * of the PDF Reference, they consist of 6 uppercase letters followed by |
| * the `+` sign. For safety, we do not skip prefixes violating this rule. |
| */ |
| |
| static const FT_String* |
| tt_skip_pdffont_random_tag( const FT_String* name ) |
| { |
| if ( ft_isupper( name[0] ) && |
| ft_isupper( name[1] ) && |
| ft_isupper( name[2] ) && |
| ft_isupper( name[3] ) && |
| ft_isupper( name[4] ) && |
| ft_isupper( name[5] ) && |
| '+' == name[6] && |
| name[7] ) |
| { |
| FT_TRACE7(( "name without randomization tag: %s\n", name + 7 )); |
| return name + 7; |
| } |
| |
| return name; |
| } |
| |
| |
| /* Compare the face with a list of well-known `tricky' fonts. */ |
| /* This list shall be expanded as we find more of them. */ |
| |
| static FT_Bool |
| tt_check_trickyness_family( const FT_String* name ) |
| { |
| |
| #define TRICK_NAMES_MAX_CHARACTERS 19 |
| #define TRICK_NAMES_COUNT 20 |
| |
| static const char trick_names[TRICK_NAMES_COUNT] |
| [TRICK_NAMES_MAX_CHARACTERS + 1] = |
| { |
| /* |
| PostScript names are given in brackets if they differ from the |
| family name. The version numbers, together with the copyright or |
| release year data, are taken from fonts available to the |
| developers. |
| |
| Note that later versions of the fonts might be no longer tricky; |
| for example, `MingLiU' version 7.00 (file `mingliu.ttc' from |
| Windows 7) is an ordinary TTC with non-tricky subfonts. |
| */ |
| |
| "cpop", /* dftt-p7.ttf; version 1.00, 1992 [DLJGyShoMedium] */ |
| "DFGirl-W6-WIN-BF", /* dftt-h6.ttf; version 1.00, 1993 */ |
| "DFGothic-EB", /* DynaLab Inc. 1992-1995 */ |
| "DFGyoSho-Lt", /* DynaLab Inc. 1992-1995 */ |
| "DFHei", /* DynaLab Inc. 1992-1995 [DFHei-Bd-WIN-HK-BF] */ |
| /* covers "DFHei-Md-HK-BF", maybe DynaLab Inc. */ |
| |
| "DFHSGothic-W5", /* DynaLab Inc. 1992-1995 */ |
| "DFHSMincho-W3", /* DynaLab Inc. 1992-1995 */ |
| "DFHSMincho-W7", /* DynaLab Inc. 1992-1995 */ |
| "DFKaiSho-SB", /* dfkaisb.ttf */ |
| "DFKaiShu", /* covers "DFKaiShu-Md-HK-BF", maybe DynaLab Inc. */ |
| "DFKai-SB", /* kaiu.ttf; version 3.00, 1998 [DFKaiShu-SB-Estd-BF] */ |
| |
| "DFMing", /* DynaLab Inc. 1992-1995 [DFMing-Md-WIN-HK-BF] */ |
| /* covers "DFMing-Bd-HK-BF", maybe DynaLab Inc. */ |
| |
| "DLC", /* dftt-m7.ttf; version 1.00, 1993 [DLCMingBold] */ |
| /* dftt-f5.ttf; version 1.00, 1993 [DLCFongSung] */ |
| /* covers following */ |
| /* "DLCHayMedium", dftt-b5.ttf; version 1.00, 1993 */ |
| /* "DLCHayBold", dftt-b7.ttf; version 1.00, 1993 */ |
| /* "DLCKaiMedium", dftt-k5.ttf; version 1.00, 1992 */ |
| /* "DLCLiShu", dftt-l5.ttf; version 1.00, 1992 */ |
| /* "DLCRoundBold", dftt-r7.ttf; version 1.00, 1993 */ |
| |
| "HuaTianKaiTi?", /* htkt2.ttf */ |
| "HuaTianSongTi?", /* htst3.ttf */ |
| "Ming(for ISO10646)", /* hkscsiic.ttf; version 0.12, 2007 [Ming] */ |
| /* iicore.ttf; version 0.07, 2007 [Ming] */ |
| "MingLiU", /* mingliu.ttf */ |
| /* mingliu.ttc; version 3.21, 2001 */ |
| "MingMedium", /* dftt-m5.ttf; version 1.00, 1993 [DLCMingMedium] */ |
| "PMingLiU", /* mingliu.ttc; version 3.21, 2001 */ |
| "MingLi43", /* mingli.ttf; version 1.00, 1992 */ |
| }; |
| |
| int nn; |
| const FT_String* name_without_tag; |
| |
| |
| name_without_tag = tt_skip_pdffont_random_tag( name ); |
| for ( nn = 0; nn < TRICK_NAMES_COUNT; nn++ ) |
| if ( ft_strstr( name_without_tag, trick_names[nn] ) ) |
| return TRUE; |
| |
| return FALSE; |
| } |
| |
| |
| /* XXX: This function should be in the `sfnt' module. */ |
| |
| /* Some PDF generators clear the checksums in the TrueType header table. */ |
| /* For example, Quartz ContextPDF clears all entries, or Bullzip PDF */ |
| /* Printer clears the entries for subsetted subtables. We thus have to */ |
| /* recalculate the checksums where necessary. */ |
| |
| static FT_UInt32 |
| tt_synth_sfnt_checksum( FT_Stream stream, |
| FT_ULong length ) |
| { |
| FT_Error error; |
| FT_UInt32 checksum = 0; |
| FT_UInt i; |
| |
| |
| if ( FT_FRAME_ENTER( length ) ) |
| return 0; |
| |
| for ( ; length > 3; length -= 4 ) |
| checksum += (FT_UInt32)FT_GET_ULONG(); |
| |
| for ( i = 3; length > 0; length--, i-- ) |
| checksum += (FT_UInt32)FT_GET_BYTE() << ( i * 8 ); |
| |
| FT_FRAME_EXIT(); |
| |
| return checksum; |
| } |
| |
| |
| /* XXX: This function should be in the `sfnt' module. */ |
| |
| static FT_ULong |
| tt_get_sfnt_checksum( TT_Face face, |
| FT_UShort i ) |
| { |
| #if 0 /* if we believe the written value, use following part. */ |
| if ( face->dir_tables[i].CheckSum ) |
| return face->dir_tables[i].CheckSum; |
| #endif |
| |
| if ( !face->goto_table ) |
| return 0; |
| |
| if ( face->goto_table( face, |
| face->dir_tables[i].Tag, |
| face->root.stream, |
| NULL ) ) |
| return 0; |
| |
| return (FT_ULong)tt_synth_sfnt_checksum( face->root.stream, |
| face->dir_tables[i].Length ); |
| } |
| |
| |
| typedef struct tt_sfnt_id_rec_ |
| { |
| FT_ULong CheckSum; |
| FT_ULong Length; |
| |
| } tt_sfnt_id_rec; |
| |
| |
| static FT_Bool |
| tt_check_trickyness_sfnt_ids( TT_Face face ) |
| { |
| #define TRICK_SFNT_IDS_PER_FACE 3 |
| #define TRICK_SFNT_IDS_NUM_FACES 31 |
| |
| static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES] |
| [TRICK_SFNT_IDS_PER_FACE] = |
| { |
| |
| #define TRICK_SFNT_ID_cvt 0 |
| #define TRICK_SFNT_ID_fpgm 1 |
| #define TRICK_SFNT_ID_prep 2 |
| |
| { /* MingLiU 1995 */ |
| { 0x05BCF058UL, 0x000002E4UL }, /* cvt */ |
| { 0x28233BF1UL, 0x000087C4UL }, /* fpgm */ |
| { 0xA344A1EAUL, 0x000001E1UL } /* prep */ |
| }, |
| { /* MingLiU 1996- */ |
| { 0x05BCF058UL, 0x000002E4UL }, /* cvt */ |
| { 0x28233BF1UL, 0x000087C4UL }, /* fpgm */ |
| { 0xA344A1EBUL, 0x000001E1UL } /* prep */ |
| }, |
| { /* DFGothic-EB */ |
| { 0x12C3EBB2UL, 0x00000350UL }, /* cvt */ |
| { 0xB680EE64UL, 0x000087A7UL }, /* fpgm */ |
| { 0xCE939563UL, 0x00000758UL } /* prep */ |
| }, |
| { /* DFGyoSho-Lt */ |
| { 0x11E5EAD4UL, 0x00000350UL }, /* cvt */ |
| { 0xCE5956E9UL, 0x0000BC85UL }, /* fpgm */ |
| { 0x8272F416UL, 0x00000045UL } /* prep */ |
| }, |
| { /* DFHei-Md-HK-BF */ |
| { 0x1257EB46UL, 0x00000350UL }, /* cvt */ |
| { 0xF699D160UL, 0x0000715FUL }, /* fpgm */ |
| { 0xD222F568UL, 0x000003BCUL } /* prep */ |
| }, |
| { /* DFHSGothic-W5 */ |
| { 0x1262EB4EUL, 0x00000350UL }, /* cvt */ |
| { 0xE86A5D64UL, 0x00007940UL }, /* fpgm */ |
| { 0x7850F729UL, 0x000005FFUL } /* prep */ |
| }, |
| { /* DFHSMincho-W3 */ |
| { 0x122DEB0AUL, 0x00000350UL }, /* cvt */ |
| { 0x3D16328AUL, 0x0000859BUL }, /* fpgm */ |
| { 0xA93FC33BUL, 0x000002CBUL } /* prep */ |
| }, |
| { /* DFHSMincho-W7 */ |
| { 0x125FEB26UL, 0x00000350UL }, /* cvt */ |
| { 0xA5ACC982UL, 0x00007EE1UL }, /* fpgm */ |
| { 0x90999196UL, 0x0000041FUL } /* prep */ |
| }, |
| { /* DFKaiShu */ |
| { 0x11E5EAD4UL, 0x00000350UL }, /* cvt */ |
| { 0x5A30CA3BUL, 0x00009063UL }, /* fpgm */ |
| { 0x13A42602UL, 0x0000007EUL } /* prep */ |
| }, |
| { /* DFKaiShu, variant */ |
| { 0x11E5EAD4UL, 0x00000350UL }, /* cvt */ |
| { 0xA6E78C01UL, 0x00008998UL }, /* fpgm */ |
| { 0x13A42602UL, 0x0000007EUL } /* prep */ |
| }, |
| { /* DFKaiShu-Md-HK-BF */ |
| { 0x11E5EAD4UL, 0x00000360UL }, /* cvt */ |
| { 0x9DB282B2UL, 0x0000C06EUL }, /* fpgm */ |
| { 0x53E6D7CAUL, 0x00000082UL } /* prep */ |
| }, |
| { /* DFMing-Bd-HK-BF */ |
| { 0x1243EB18UL, 0x00000350UL }, /* cvt */ |
| { 0xBA0A8C30UL, 0x000074ADUL }, /* fpgm */ |
| { 0xF3D83409UL, 0x0000037BUL } /* prep */ |
| }, |
| { /* DLCLiShu */ |
| { 0x07DCF546UL, 0x00000308UL }, /* cvt */ |
| { 0x40FE7C90UL, 0x00008E2AUL }, /* fpgm */ |
| { 0x608174B5UL, 0x0000007AUL } /* prep */ |
| }, |
| { /* DLCHayBold */ |
| { 0xEB891238UL, 0x00000308UL }, /* cvt */ |
| { 0xD2E4DCD4UL, 0x0000676FUL }, /* fpgm */ |
| { 0x8EA5F293UL, 0x000003B8UL } /* prep */ |
| }, |
| { /* HuaTianKaiTi */ |
| { 0xFFFBFFFCUL, 0x00000008UL }, /* cvt */ |
| { 0x9C9E48B8UL, 0x0000BEA2UL }, /* fpgm */ |
| { 0x70020112UL, 0x00000008UL } /* prep */ |
| }, |
| { /* HuaTianSongTi */ |
| { 0xFFFBFFFCUL, 0x00000008UL }, /* cvt */ |
| { 0x0A5A0483UL, 0x00017C39UL }, /* fpgm */ |
| { 0x70020112UL, 0x00000008UL } /* prep */ |
| }, |
| { /* NEC fadpop7.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x40C92555UL, 0x000000E5UL }, /* fpgm */ |
| { 0xA39B58E3UL, 0x0000117CUL } /* prep */ |
| }, |
| { /* NEC fadrei5.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x33C41652UL, 0x000000E5UL }, /* fpgm */ |
| { 0x26D6C52AUL, 0x00000F6AUL } /* prep */ |
| }, |
| { /* NEC fangot7.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x6DB1651DUL, 0x0000019DUL }, /* fpgm */ |
| { 0x6C6E4B03UL, 0x00002492UL } /* prep */ |
| }, |
| { /* NEC fangyo5.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x40C92555UL, 0x000000E5UL }, /* fpgm */ |
| { 0xDE51FAD0UL, 0x0000117CUL } /* prep */ |
| }, |
| { /* NEC fankyo5.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x85E47664UL, 0x000000E5UL }, /* fpgm */ |
| { 0xA6C62831UL, 0x00001CAAUL } /* prep */ |
| }, |
| { /* NEC fanrgo5.ttf */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x2D891CFDUL, 0x0000019DUL }, /* fpgm */ |
| { 0xA0604633UL, 0x00001DE8UL } /* prep */ |
| }, |
| { /* NEC fangot5.ttc */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x40AA774CUL, 0x000001CBUL }, /* fpgm */ |
| { 0x9B5CAA96UL, 0x00001F9AUL } /* prep */ |
| }, |
| { /* NEC fanmin3.ttc */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x0D3DE9CBUL, 0x00000141UL }, /* fpgm */ |
| { 0xD4127766UL, 0x00002280UL } /* prep */ |
| }, |
| { /* NEC FA-Gothic, 1996 */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x4A692698UL, 0x000001F0UL }, /* fpgm */ |
| { 0x340D4346UL, 0x00001FCAUL } /* prep */ |
| }, |
| { /* NEC FA-Minchou, 1996 */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0xCD34C604UL, 0x00000166UL }, /* fpgm */ |
| { 0x6CF31046UL, 0x000022B0UL } /* prep */ |
| }, |
| { /* NEC FA-RoundGothicB, 1996 */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0x5DA75315UL, 0x0000019DUL }, /* fpgm */ |
| { 0x40745A5FUL, 0x000022E0UL } /* prep */ |
| }, |
| { /* NEC FA-RoundGothicM, 1996 */ |
| { 0x00000000UL, 0x00000000UL }, /* cvt */ |
| { 0xF055FC48UL, 0x000001C2UL }, /* fpgm */ |
| { 0x3900DED3UL, 0x00001E18UL } /* prep */ |
| }, |
| { /* MINGLI.TTF, 1992 */ |
| { 0x00170003UL, 0x00000060UL }, /* cvt */ |
| { 0xDBB4306EUL, 0x000058AAUL }, /* fpgm */ |
| { 0xD643482AUL, 0x00000035UL } /* prep */ |
| }, |
| { /* DFHei-Bd-WIN-HK-BF, issue #1087 */ |
| { 0x1269EB58UL, 0x00000350UL }, /* cvt */ |
| { 0x5CD5957AUL, 0x00006A4EUL }, /* fpgm */ |
| { 0xF758323AUL, 0x00000380UL } /* prep */ |
| }, |
| { /* DFMing-Md-WIN-HK-BF, issue #1087 */ |
| { 0x122FEB0BUL, 0x00000350UL }, /* cvt */ |
| { 0x7F10919AUL, 0x000070A9UL }, /* fpgm */ |
| { 0x7CD7E7B7UL, 0x0000025CUL } /* prep */ |
| } |
| }; |
| |
| FT_ULong checksum; |
| int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES]; |
| FT_Bool has_cvt, has_fpgm, has_prep; |
| FT_UShort i; |
| int j, k; |
| |
| |
| FT_MEM_SET( num_matched_ids, 0, |
| sizeof ( int ) * TRICK_SFNT_IDS_NUM_FACES ); |
| has_cvt = FALSE; |
| has_fpgm = FALSE; |
| has_prep = FALSE; |
| |
| for ( i = 0; i < face->num_tables; i++ ) |
| { |
| checksum = 0; |
| |
| switch( face->dir_tables[i].Tag ) |
| { |
| case TTAG_cvt: |
| k = TRICK_SFNT_ID_cvt; |
| has_cvt = TRUE; |
| break; |
| |
| case TTAG_fpgm: |
| k = TRICK_SFNT_ID_fpgm; |
| has_fpgm = TRUE; |
| break; |
| |
| case TTAG_prep: |
| k = TRICK_SFNT_ID_prep; |
| has_prep = TRUE; |
| break; |
| |
| default: |
| continue; |
| } |
| |
| for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ ) |
| if ( face->dir_tables[i].Length == sfnt_id[j][k].Length ) |
| { |
| if ( !checksum ) |
| checksum = tt_get_sfnt_checksum( face, i ); |
| |
| if ( sfnt_id[j][k].CheckSum == checksum ) |
| num_matched_ids[j]++; |
| |
| if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE ) |
| return TRUE; |
| } |
| } |
| |
| for ( j = 0; j < TRICK_SFNT_IDS_NUM_FACES; j++ ) |
| { |
| if ( !has_cvt && !sfnt_id[j][TRICK_SFNT_ID_cvt].Length ) |
| num_matched_ids[j]++; |
| if ( !has_fpgm && !sfnt_id[j][TRICK_SFNT_ID_fpgm].Length ) |
| num_matched_ids[j]++; |
| if ( !has_prep && !sfnt_id[j][TRICK_SFNT_ID_prep].Length ) |
| num_matched_ids[j]++; |
| if ( num_matched_ids[j] == TRICK_SFNT_IDS_PER_FACE ) |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| |
| static FT_Bool |
| tt_check_trickyness( FT_Face face ) |
| { |
| if ( !face ) |
| return FALSE; |
| |
| /* For first, check the face name for quick check. */ |
| if ( face->family_name && |
| tt_check_trickyness_family( face->family_name ) ) |
| { |
| FT_TRACE3(( "found as a tricky font" |
| " by its family name: %s\n", face->family_name )); |
| return TRUE; |
| } |
| |
| /* Type42 fonts may lack `name' tables, we thus try to identify */ |
| /* tricky fonts by checking the checksums of Type42-persistent */ |
| /* sfnt tables (`cvt', `fpgm', and `prep'). */ |
| if ( tt_check_trickyness_sfnt_ids( (TT_Face)face ) ) |
| { |
| FT_TRACE3(( "found as a tricky font" |
| " by its cvt/fpgm/prep table checksum\n" )); |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| |
| /* Check whether `.notdef' is the only glyph in the `loca' table. */ |
| static FT_Bool |
| tt_check_single_notdef( FT_Face ttface ) |
| { |
| FT_Bool result = FALSE; |
| |
| TT_Face face = (TT_Face)ttface; |
| FT_ULong asize; |
| FT_ULong i; |
| FT_ULong glyph_index = 0; |
| FT_UInt count = 0; |
| |
| |
| for( i = 0; i < face->num_locations; i++ ) |
| { |
| tt_face_get_location( ttface, i, &asize ); |
| if ( asize > 0 ) |
| { |
| count += 1; |
| if ( count > 1 ) |
| break; |
| glyph_index = i; |
| } |
| } |
| |
| /* Only have a single outline. */ |
| if ( count == 1 ) |
| { |
| if ( glyph_index == 0 ) |
| result = TRUE; |
| else |
| { |
| /* FIXME: Need to test glyphname == .notdef ? */ |
| FT_Error error; |
| char buf[8]; |
| |
| |
| error = FT_Get_Glyph_Name( ttface, glyph_index, buf, 8 ); |
| if ( !error && |
| buf[0] == '.' && !ft_strncmp( buf, ".notdef", 8 ) ) |
| 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 TrueType font, if we are opening a |
| * collection, in bits 0-15. The numbered instance |
| * index~+~1 of a GX (sub)font, if applicable, in bits |
| * 16-30. |
| * |
| * 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 = FT_THROW( Missing_Module ); |
| goto Exit; |
| } |
| |
| /* create input stream from resource */ |
| if ( FT_STREAM_SEEK( 0 ) ) |
| goto Exit; |
| |
| /* check that we have a valid TrueType file */ |
| FT_TRACE2(( " " )); |
| error = sfnt->init_face( stream, face, face_index, num_params, params ); |
| |
| /* Stream may have changed. */ |
| stream = face->root.stream; |
| |
| 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 */ |
| face->format_tag != TTAG_0xA5kbd && /* `Keyboard.dfont' (legacy Mac OS X) */ |
| face->format_tag != TTAG_0xA5lst ) /* `LastResort.dfont' (legacy Mac OS X) */ |
| { |
| 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 FT_Err_Ok; |
| |
| /* Load font directory */ |
| error = sfnt->load_face( stream, face, face_index, num_params, params ); |
| if ( error ) |
| goto Exit; |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| if ( tt_check_trickyness( ttface ) ) |
| ttface->face_flags |= FT_FACE_FLAG_TRICKY; |
| #endif |
| |
| error = tt_face_load_hdmx( face, stream ); |
| if ( error ) |
| goto Exit; |
| |
| if ( FT_IS_SCALABLE( ttface ) || |
| FT_HAS_SBIX( ttface ) ) |
| { |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| if ( !ttface->internal->incremental_interface ) |
| #endif |
| { |
| error = tt_face_load_loca( face, stream ); |
| |
| /* having a (non-zero) `glyf' table without */ |
| /* a `loca' table is not valid */ |
| if ( face->glyf_len && FT_ERR_EQ( error, Table_Missing ) ) |
| goto Exit; |
| if ( error ) |
| goto Exit; |
| } |
| |
| /* `fpgm', `cvt', and `prep' are optional */ |
| error = tt_face_load_cvt( face, stream ); |
| if ( error && FT_ERR_NEQ( error, Table_Missing ) ) |
| goto Exit; |
| |
| error = tt_face_load_fpgm( face, stream ); |
| if ( error && FT_ERR_NEQ( error, Table_Missing ) ) |
| goto Exit; |
| |
| error = tt_face_load_prep( face, stream ); |
| if ( error && FT_ERR_NEQ( error, Table_Missing ) ) |
| goto Exit; |
| |
| /* Check the scalable flag based on `loca'. */ |
| #ifdef FT_CONFIG_OPTION_INCREMENTAL |
| if ( !ttface->internal->incremental_interface ) |
| #endif |
| { |
| 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" )); |
| FT_TRACE5(( " " |
| " Resetting scalable flag to FALSE.\n" )); |
| |
| ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE; |
| } |
| } |
| } |
| |
| #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT |
| { |
| FT_UInt instance_index = (FT_UInt)face_index >> 16; |
| |
| |
| if ( FT_HAS_MULTIPLE_MASTERS( ttface ) ) |
| { |
| error = FT_Set_Named_Instance( ttface, instance_index ); |
| if ( error ) |
| goto Exit; |
| } |
| } |
| #endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */ |
| |
| /* initialize standard glyph loading routines */ |
| TT_Init_Glyph_Loading( face ); |
| |
| Exit: |
| return error; |
| |
| Bad_Format: |
| error = FT_THROW( 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( ttface ); |
| 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; |
| |
| |
| exec = size->context; |
| |
| error = TT_Load_Context( exec, face, size ); |
| if ( error ) |
| return error; |
| |
| exec->callTop = 0; |
| exec->top = 0; |
| |
| exec->period = 64; |
| exec->phase = 0; |
| exec->threshold = 0; |
| |
| exec->instruction_trap = FALSE; |
| exec->F_dot_P = 0x4000L; |
| |
| exec->pedantic_hinting = pedantic; |
| |
| { |
| FT_Size_Metrics* size_metrics = &exec->metrics; |
| TT_Size_Metrics* tt_metrics = &exec->tt_metrics; |
| |
| |
| size_metrics->x_ppem = 0; |
| size_metrics->y_ppem = 0; |
| size_metrics->x_scale = 0; |
| size_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, |
| (FT_Long)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 ) |
| { |
| TT_Goto_CodeRange( exec, tt_coderange_font, 0 ); |
| |
| FT_TRACE4(( "Executing `fpgm' table.\n" )); |
| error = face->interpreter( exec ); |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( error ) |
| FT_TRACE4(( " interpretation failed with error code 0x%x\n", |
| error )); |
| #endif |
| } |
| else |
| error = FT_Err_Ok; |
| |
| size->bytecode_ready = error; |
| |
| 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; |
| FT_UInt i; |
| |
| /* unscaled CVT values are already stored in 26.6 format */ |
| FT_Fixed scale = size->ttmetrics.scale >> 6; |
| |
| |
| /* Scale the cvt values to the new ppem. */ |
| /* By default, we use the y ppem value for scaling. */ |
| FT_TRACE6(( "CVT values:\n" )); |
| for ( i = 0; i < size->cvt_size; i++ ) |
| { |
| size->cvt[i] = FT_MulFix( face->cvt[i], scale ); |
| FT_TRACE6(( " %3d: %f (%f)\n", |
| i, (double)face->cvt[i] / 64, (double)size->cvt[i] / 64 )); |
| } |
| FT_TRACE6(( "\n" )); |
| |
| exec = size->context; |
| |
| error = TT_Load_Context( exec, face, size ); |
| if ( error ) |
| return error; |
| |
| exec->callTop = 0; |
| exec->top = 0; |
| |
| exec->instruction_trap = FALSE; |
| |
| exec->pedantic_hinting = pedantic; |
| |
| TT_Set_CodeRange( exec, |
| tt_coderange_cvt, |
| face->cvt_program, |
| (FT_Long)face->cvt_program_size ); |
| |
| TT_Clear_CodeRange( exec, tt_coderange_glyph ); |
| |
| if ( face->cvt_program_size > 0 ) |
| { |
| TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 ); |
| |
| FT_TRACE4(( "Executing `prep' table.\n" )); |
| error = face->interpreter( exec ); |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( error ) |
| FT_TRACE4(( " interpretation failed with error code 0x%x\n", |
| error )); |
| #endif |
| } |
| else |
| error = FT_Err_Ok; |
| |
| size->cvt_ready = error; |
| |
| /* UNDOCUMENTED! The MS rasterizer doesn't allow the following */ |
| /* graphics state variables to be modified by the CVT program. */ |
| |
| exec->GS.dualVector.x = 0x4000; |
| exec->GS.dualVector.y = 0; |
| exec->GS.projVector.x = 0x4000; |
| exec->GS.projVector.y = 0x0; |
| exec->GS.freeVector.x = 0x4000; |
| exec->GS.freeVector.y = 0x0; |
| |
| exec->GS.rp0 = 0; |
| exec->GS.rp1 = 0; |
| exec->GS.rp2 = 0; |
| |
| exec->GS.gep0 = 1; |
| exec->GS.gep1 = 1; |
| exec->GS.gep2 = 1; |
| |
| exec->GS.loop = 1; |
| |
| /* save as default graphics state */ |
| size->GS = exec->GS; |
| |
| TT_Save_Context( exec, size ); |
| |
| return error; |
| } |
| |
| |
| 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->context ) |
| { |
| TT_Done_Context( size->context ); |
| size->context = NULL; |
| } |
| |
| 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 = -1; |
| size->cvt_ready = -1; |
| } |
| |
| |
| /* 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_UShort n_twilight; |
| TT_MaxProfile* maxp = &face->max_profile; |
| |
| |
| /* clean up bytecode related data */ |
| FT_FREE( size->function_defs ); |
| FT_FREE( size->instruction_defs ); |
| FT_FREE( size->cvt ); |
| FT_FREE( size->storage ); |
| |
| if ( size->context ) |
| TT_Done_Context( size->context ); |
| tt_glyphzone_done( &size->twilight ); |
| |
| size->bytecode_ready = -1; |
| size->cvt_ready = -1; |
| |
| size->context = TT_New_Context( (TT_Driver)face->root.driver ); |
| |
| 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* tt_metrics = &size->ttmetrics; |
| |
| |
| tt_metrics->rotated = FALSE; |
| tt_metrics->stretched = FALSE; |
| |
| /* Set default engine compensation. Value 3 is not described */ |
| /* in the OpenType specification (as of Mai 2019), but Greg */ |
| /* says that MS handles it the same as `gray'. */ |
| /* */ |
| /* The Apple specification says that the compensation for */ |
| /* `gray' is always zero. FreeType doesn't do any */ |
| /* compensation at all. */ |
| tt_metrics->compensations[0] = 0; /* gray */ |
| tt_metrics->compensations[1] = 0; /* black */ |
| tt_metrics->compensations[2] = 0; /* white */ |
| tt_metrics->compensations[3] = 0; /* zero */ |
| } |
| |
| /* 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! */ |
| |
| /* In case of an error while executing `fpgm', we intentionally don't */ |
| /* clean up immediately – bugs in the `fpgm' are so fundamental that */ |
| /* all following hinting calls should fail. Additionally, `fpgm' is */ |
| /* to be executed just once; calling it again is completely useless */ |
| /* and might even lead to extremely slow behaviour if it is malformed */ |
| /* (containing an infinite loop, for example). */ |
| error = tt_size_run_fpgm( size, pedantic ); |
| return error; |
| |
| 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 = FT_Err_Ok; |
| |
| |
| if ( size->bytecode_ready < 0 ) |
| error = tt_size_init_bytecode( (FT_Size)size, pedantic ); |
| else |
| error = size->bytecode_ready; |
| |
| if ( error ) |
| goto Exit; |
| |
| /* rescale CVT when needed */ |
| if ( size->cvt_ready < 0 ) |
| { |
| FT_UShort i; |
| |
| |
| /* all twilight points are originally zero */ |
| for ( i = 0; i < 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 < size->storage_size; i++ ) |
| size->storage[i] = 0; |
| |
| size->GS = tt_default_graphics_state; |
| |
| error = tt_size_run_prep( size, pedantic ); |
| } |
| else |
| error = size->cvt_ready; |
| |
| 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 = FT_Err_Ok; |
| |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| size->bytecode_ready = -1; |
| size->cvt_ready = -1; |
| #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 |
| tt_size_done_bytecode( ttsize ); |
| #endif |
| |
| size->ttmetrics.valid = FALSE; |
| } |
| |
| |
| /************************************************************************** |
| * |
| * @Function: |
| * tt_size_reset_height |
| * |
| * @Description: |
| * Recompute a TrueType size's ascender, descender, and height |
| * when resolutions and character dimensions have been changed. |
| * Used for variation fonts as an iterator function. |
| * |
| * @Input: |
| * ft_size :: |
| * A handle to the target TT_Size object. This function will be called |
| * through a `FT_Size_Reset_Func` pointer which takes `FT_Size`. This |
| * function must take `FT_Size` as a result. The passed `FT_Size` is |
| * expected to point to a `TT_Size`. |
| */ |
| FT_LOCAL_DEF( FT_Error ) |
| tt_size_reset_height( FT_Size ft_size ) |
| { |
| TT_Size size = (TT_Size)ft_size; |
| TT_Face face = (TT_Face)size->root.face; |
| FT_Size_Metrics* size_metrics = &size->hinted_metrics; |
| |
| size->ttmetrics.valid = FALSE; |
| |
| /* copy the result from base layer */ |
| *size_metrics = size->root.metrics; |
| |
| if ( size_metrics->x_ppem < 1 || size_metrics->y_ppem < 1 ) |
| return FT_THROW( 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 ) |
| { |
| /* the TT spec always asks for ROUND, not FLOOR or CEIL */ |
| size_metrics->ascender = FT_PIX_ROUND( |
| FT_MulFix( face->root.ascender, |
| size_metrics->y_scale ) ); |
| size_metrics->descender = FT_PIX_ROUND( |
| FT_MulFix( face->root.descender, |
| size_metrics->y_scale ) ); |
| size_metrics->height = FT_PIX_ROUND( |
| FT_MulFix( face->root.height, |
| size_metrics->y_scale ) ); |
| } |
| |
| size->ttmetrics.valid = TRUE; |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| /************************************************************************** |
| * |
| * @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 ) |
| { |
| FT_Error error; |
| TT_Face face = (TT_Face)size->root.face; |
| FT_Size_Metrics* size_metrics = &size->hinted_metrics; |
| |
| |
| error = tt_size_reset_height( (FT_Size)size ); |
| if ( error ) |
| return error; |
| |
| if ( face->header.Flags & 8 ) |
| { |
| /* base scaling values on integer ppem values, */ |
| /* as mandated by the TrueType specification */ |
| size_metrics->x_scale = FT_DivFix( size_metrics->x_ppem << 6, |
| face->root.units_per_EM ); |
| size_metrics->y_scale = FT_DivFix( size_metrics->y_ppem << 6, |
| face->root.units_per_EM ); |
| |
| size_metrics->max_advance = FT_PIX_ROUND( |
| FT_MulFix( face->root.max_advance_width, |
| size_metrics->x_scale ) ); |
| } |
| |
| /* compute new transformation */ |
| if ( size_metrics->x_ppem >= size_metrics->y_ppem ) |
| { |
| size->ttmetrics.scale = size_metrics->x_scale; |
| size->ttmetrics.ppem = size_metrics->x_ppem; |
| size->ttmetrics.x_ratio = 0x10000L; |
| size->ttmetrics.y_ratio = FT_DivFix( size_metrics->y_ppem, |
| size_metrics->x_ppem ); |
| } |
| else |
| { |
| size->ttmetrics.scale = size_metrics->y_scale; |
| size->ttmetrics.ppem = size_metrics->y_ppem; |
| size->ttmetrics.x_ratio = FT_DivFix( size_metrics->x_ppem, |
| size_metrics->y_ppem ); |
| size->ttmetrics.y_ratio = 0x10000L; |
| } |
| |
| size->widthp = tt_face_get_device_metrics( face, size_metrics->x_ppem, 0 ); |
| |
| size->metrics = size_metrics; |
| |
| #ifdef TT_USE_BYTECODE_INTERPRETER |
| size->cvt_ready = -1; |
| #endif /* TT_USE_BYTECODE_INTERPRETER */ |
| |
| return FT_Err_Ok; |
| } |
| |
| |
| /************************************************************************** |
| * |
| * @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; |
| |
| driver->interpreter_version = TT_INTERPRETER_VERSION_35; |
| #ifdef TT_SUPPORT_SUBPIXEL_HINTING_MINIMAL |
| driver->interpreter_version = TT_INTERPRETER_VERSION_40; |
| #endif |
| |
| #else /* !TT_USE_BYTECODE_INTERPRETER */ |
| |
| FT_UNUSED( ttdriver ); |
| |
| #endif /* !TT_USE_BYTECODE_INTERPRETER */ |
| |
| return FT_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 */ |
| { |
| FT_UNUSED( ttdriver ); |
| } |
| |
| |
| /************************************************************************** |
| * |
| * @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 */ |
