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-rw-r--r--third_party/freetype/src/truetype/ttobjs.c1363
1 files changed, 0 insertions, 1363 deletions
diff --git a/third_party/freetype/src/truetype/ttobjs.c b/third_party/freetype/src/truetype/ttobjs.c
deleted file mode 100644
index 18aa48a93f..0000000000
--- a/third_party/freetype/src/truetype/ttobjs.c
+++ /dev/null
@@ -1,1363 +0,0 @@
-/***************************************************************************/
-/* */
-/* ttobjs.c */
-/* */
-/* Objects manager (body). */
-/* */
-/* Copyright 1996-2017 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 <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_STREAM_H
-#include FT_TRUETYPE_TAGS_H
-#include FT_INTERNAL_SFNT_H
-#include FT_TRUETYPE_DRIVER_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 trace_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;
- }
-#endif /* TT_USE_BYTECODE_INTERPRETER */
-
-
- /* 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( FT_String* name )
- {
-
-#define TRICK_NAMES_MAX_CHARACTERS 19
-#define TRICK_NAMES_COUNT 9
-
- static const char trick_names[TRICK_NAMES_COUNT]
- [TRICK_NAMES_MAX_CHARACTERS + 1] =
- {
- "DFKaiSho-SB", /* dfkaisb.ttf */
- "DFKaiShu",
- "DFKai-SB", /* kaiu.ttf */
- "HuaTianKaiTi?", /* htkt2.ttf */
- "HuaTianSongTi?", /* htst3.ttf */
- "Ming(for ISO10646)", /* hkscsiic.ttf & iicore.ttf */
- "MingLiU", /* mingliu.ttf & mingliu.ttc */
- "PMingLiU", /* mingliu.ttc */
- "MingLi43", /* mingli.ttf */
- };
-
- int nn;
-
-
- for ( nn = 0; nn < TRICK_NAMES_COUNT; nn++ )
- if ( ft_strstr( name, 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 18
-
- 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 */
- },
- { /* DFKaiShu */
- { 0x11E5EAD4UL, 0x00000350UL }, /* cvt */
- { 0x5A30CA3BUL, 0x00009063UL }, /* fpgm */
- { 0x13A42602UL, 0x0000007EUL } /* prep */
- },
- { /* DFKaiShu2 */
- { 0x11E5EAD4UL, 0x00000350UL }, /* cvt */
- { 0xA6E78C01UL, 0x00008998UL }, /* fpgm */
- { 0x13A42602UL, 0x0000007EUL } /* 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 */
- }
- };
-
- 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 ) )
- 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 ) )
- return TRUE;
-
- return FALSE;
- }
-
-
- /* 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_UInt 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( face, 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 */
- {
- 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;
-
- if ( tt_check_trickyness( ttface ) )
- ttface->face_flags |= FT_FACE_FLAG_TRICKY;
-
- error = tt_face_load_hdmx( face, stream );
- if ( error )
- goto Exit;
-
- if ( FT_IS_SCALABLE( ttface ) )
- {
-#ifdef FT_CONFIG_OPTION_INCREMENTAL
- if ( !ttface->internal->incremental_interface )
-#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"
- " "
- " Resetting scalable flag to FALSE.\n" ));
-
- ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
- }
- }
- }
-
-#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
-
- {
- FT_Int instance_index = face_index >> 16;
-
-
- if ( FT_HAS_MULTIPLE_MASTERS( ttface ) &&
- instance_index > 0 )
- {
- error = TT_Get_MM_Var( face, NULL );
- if ( error )
- goto Exit;
-
- if ( face->blend->mmvar->namedstyle )
- {
- FT_Memory memory = ttface->memory;
-
- FT_Var_Named_Style* named_style;
- FT_String* style_name;
-
-
- /* in `face_index', the instance index starts with value 1 */
- named_style = face->blend->mmvar->namedstyle + instance_index - 1;
- error = sfnt->get_name( face,
- (FT_UShort)named_style->strid,
- &style_name );
- if ( error )
- goto Exit;
-
- /* set style name; if already set, replace it */
- if ( face->root.style_name )
- FT_FREE( face->root.style_name );
- face->root.style_name = style_name;
-
- /* finally, select the named instance */
- error = TT_Set_Var_Design( face,
- face->blend->mmvar->num_axis,
- named_style->coords );
- if ( error )
- goto Exit;
-
- tt_apply_mvar( face );
- }
- }
- }
-
-#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( face );
- 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* metrics = &exec->metrics;
- TT_Size_Metrics* tt_metrics = &exec->tt_metrics;
-
-
- metrics->x_ppem = 0;
- metrics->y_ppem = 0;
- metrics->x_scale = 0;
- metrics->y_scale = 0;
-
- tt_metrics->ppem = 0;
- tt_metrics->scale = 0;
- tt_metrics->ratio = 0x10000L;
- }
-
- /* allow font program execution */
- TT_Set_CodeRange( exec,
- tt_coderange_font,
- face->font_program,
- (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;
-
-
- 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* metrics = &size->ttmetrics;
-
-
- metrics->rotated = FALSE;
- metrics->stretched = FALSE;
-
- /* set default engine compensation */
- metrics->compensations[0] = 0; /* gray */
- metrics->compensations[1] = 0; /* black */
- metrics->compensations[2] = 0; /* white */
- metrics->compensations[3] = 0; /* reserved */
- }
-
- /* 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_UInt i;
- TT_Face face = (TT_Face)size->root.face;
-
-
- /* Scale the cvt values to the new ppem. */
- /* We use by default the y ppem to scale the CVT. */
- for ( i = 0; i < size->cvt_size; i++ )
- size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
-
- /* all twilight points are originally zero */
- for ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ )
- {
- size->twilight.org[i].x = 0;
- size->twilight.org[i].y = 0;
- size->twilight.cur[i].x = 0;
- size->twilight.cur[i].y = 0;
- }
-
- /* clear storage area */
- for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
- size->storage[i] = 0;
-
- size->GS = tt_default_graphics_state;
-
- error = tt_size_run_prep( size, pedantic );
- }
- 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 */
- /* */
- /* <Description> */
- /* Reset a TrueType size when resolutions and character dimensions */
- /* have been changed. */
- /* */
- /* <Input> */
- /* size :: A handle to the target size object. */
- /* */
- /* only_height :: Only recompute ascender, descender, and height. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- tt_size_reset( TT_Size size,
- FT_Bool only_height )
- {
- TT_Face face;
- FT_Size_Metrics* metrics;
-
-
- size->ttmetrics.valid = FALSE;
-
- face = (TT_Face)size->root.face;
-
- metrics = &size->metrics;
-
- /* copy the result from base layer */
- *metrics = size->root.metrics;
-
- if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
- return 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 )
- {
- metrics->ascender =
- FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) );
- metrics->descender =
- FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) );
- metrics->height =
- FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) );
- }
-
- size->ttmetrics.valid = TRUE;
-
- if ( only_height )
- return FT_Err_Ok;
-
- if ( face->header.Flags & 8 )
- {
- metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
- face->root.units_per_EM );
- metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
- face->root.units_per_EM );
-
- metrics->max_advance =
- FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width,
- metrics->x_scale ) );
- }
-
- /* compute new transformation */
- if ( metrics->x_ppem >= metrics->y_ppem )
- {
- size->ttmetrics.scale = metrics->x_scale;
- size->ttmetrics.ppem = metrics->x_ppem;
- size->ttmetrics.x_ratio = 0x10000L;
- size->ttmetrics.y_ratio = FT_DivFix( metrics->y_ppem,
- metrics->x_ppem );
- }
- else
- {
- size->ttmetrics.scale = metrics->y_scale;
- size->ttmetrics.ppem = metrics->y_ppem;
- size->ttmetrics.x_ratio = FT_DivFix( metrics->x_ppem,
- metrics->y_ppem );
- size->ttmetrics.y_ratio = 0x10000L;
- }
-
-#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_INFINALITY
- driver->interpreter_version = TT_INTERPRETER_VERSION_38;
-#endif
-#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 */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 08:20:27 +0000