/* */
/* Objects manager (body). */
/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007 by */
+/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
+/* 2010 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_CALC_H
#include FT_INTERNAL_STREAM_H
-#include FT_TRUETYPE_IDS_H
#include FT_TRUETYPE_TAGS_H
#include FT_INTERNAL_SFNT_H
#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 16
+#define TRICK_NAMES_COUNT 8
+
+ 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 */
+ "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;
+ int 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 ( face->dir_tables[i].CheckSum )
+ return face->dir_tables[i].CheckSum;
+
+ else if ( !face->goto_table )
+ return 0;
+
+ else 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 5
+
+ 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 */
+ { 0x05bcf058, 0x000002e4 }, /* cvt */
+ { 0x28233bf1, 0x000087c4 }, /* fpgm */
+ { 0xa344a1ea, 0x000001e1 } /* prep */
+ },
+ { /* MingLiU 1996- */
+ { 0x05bcf058, 0x000002e4 }, /* cvt */
+ { 0x28233bf1, 0x000087c4 }, /* fpgm */
+ { 0xa344a1eb, 0x000001e1 } /* prep */
+ },
+ { /* DFKaiShu */
+ { 0x11e5ead4, 0x00000350 }, /* cvt */
+ { 0x5a30ca3b, 0x00009063 }, /* fpgm */
+ { 0x13a42602, 0x0000007e } /* prep */
+ },
+ { /* HuaTianKaiTi */
+ { 0xfffbfffc, 0x00000008 }, /* cvt */
+ { 0x9c9e48b8, 0x0000bea2 }, /* fpgm */
+ { 0x70020112, 0x00000008 } /* prep */
+ },
+ { /* HuaTianSongTi */
+ { 0xfffbfffc, 0x00000008 }, /* cvt */
+ { 0x0a5a0483, 0x00017c39 }, /* fpgm */
+ { 0x70020112, 0x00000008 } /* prep */
+ }
+ };
+
+ FT_ULong checksum;
+ int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
+ int i, j, k;
+
+
+ FT_MEM_SET( num_matched_ids, 0,
+ sizeof( int ) * TRICK_SFNT_IDS_NUM_FACES );
+
+ for ( i = 0; i < face->num_tables; i++ )
+ {
+ checksum = 0;
+
+ switch( face->dir_tables[i].Tag )
+ {
+ case TTAG_cvt:
+ k = TRICK_SFNT_ID_cvt;
+ break;
+
+ case TTAG_fpgm:
+ k = TRICK_SFNT_ID_fpgm;
+ break;
+
+ case TTAG_prep:
+ k = TRICK_SFNT_ID_prep;
+ 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;
+ }
+ }
+
+ return FALSE;
+ }
+
+
+ static FT_Bool
+ tt_check_trickyness( FT_Face face )
+ {
+ if ( !face )
+ return FALSE;
+
+ /* First, check the face name. */
+ if ( face->family_name )
+ {
+ if ( tt_check_trickyness_family( face->family_name ) )
+ return TRUE;
+ else
+ return FALSE;
+ }
+
+ /* 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;
+ }
+
+
/*************************************************************************/
/* */
/* <Function> */
TT_Face face = (TT_Face)ttface;
- library = face->root.driver->root.library;
+ library = ttface->driver->root.library;
sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
if ( !sfnt )
goto Bad_Format;
}
#ifdef TT_USE_BYTECODE_INTERPRETER
- face->root.face_flags |= FT_FACE_FLAG_HINTER;
+ ttface->face_flags |= FT_FACE_FLAG_HINTER;
#endif
/* If we are performing a simple font format check, exit immediately. */
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 ( face->root.face_flags & FT_FACE_FLAG_SCALABLE )
+ if ( FT_IS_SCALABLE( ttface ) )
{
#ifdef FT_CONFIG_OPTION_INCREMENTAL
- if ( !face->root.internal->incremental_interface )
+ if ( !ttface->internal->incremental_interface )
error = tt_face_load_loca( face, stream );
if ( !error )
- error = tt_face_load_cvt( face, stream ) ||
- tt_face_load_fpgm( face, stream ) ||
- tt_face_load_prep( face, stream );
+ error = tt_face_load_cvt( face, stream );
+ if ( !error )
+ error = tt_face_load_fpgm( face, stream );
+ if ( !error )
+ error = tt_face_load_prep( face, stream );
#else
if ( !error )
- error = tt_face_load_loca( face, stream ) ||
- tt_face_load_cvt( face, stream ) ||
- tt_face_load_fpgm( face, stream ) ||
- tt_face_load_prep( face, stream );
+ error = tt_face_load_loca( face, stream );
+ if ( !error )
+ error = tt_face_load_cvt( face, stream );
+ if ( !error )
+ error = tt_face_load_fpgm( face, stream );
+ if ( !error )
+ error = tt_face_load_prep( face, stream );
#endif
if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING )
unpatented_hinting = TRUE;
- /* Compare the face with a list of well-known `tricky' fonts. */
- /* This list shall be expanded as we find more of them. */
if ( !unpatented_hinting )
- {
- static const char* const trick_names[] =
- {
- "DFKaiSho-SB", /* dfkaisb.ttf */
- "DFKai-SB", /* kaiu.ttf */
- "HuaTianSongTi?", /* htst3.ttf */
- "MingLiU", /* mingliu.ttf & mingliu.ttc */
- "PMingLiU", /* mingliu.ttc */
- "MingLi43", /* mingli.ttf */
- NULL
- };
- int nn;
-
-
- /* Note that we only check the face name at the moment; it might */
- /* be worth to do more checks for a few special cases. */
- for ( nn = 0; trick_names[nn] != NULL; nn++ )
- {
- if ( ttface->family_name &&
- ft_strstr( ttface->family_name, trick_names[nn] ) )
- {
- unpatented_hinting = 1;
- break;
- }
- }
- }
-
- ttface->internal->ignore_unpatented_hinter =
- FT_BOOL( !unpatented_hinting );
+ ttface->internal->ignore_unpatented_hinter = TRUE;
}
#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING &&
FT_LOCAL_DEF( void )
tt_face_done( FT_Face ttface ) /* TT_Face */
{
- TT_Face face = (TT_Face)ttface;
- FT_Memory memory = face->root.memory;
- FT_Stream stream = face->root.stream;
+ TT_Face face = (TT_Face)ttface;
+ FT_Memory memory;
+ FT_Stream stream;
+ SFNT_Service sfnt;
- SFNT_Service sfnt = (SFNT_Service)face->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 )
error = TT_Goto_CodeRange( exec, tt_coderange_font, 0 );
if ( !error )
+ {
+ FT_TRACE4(( "Executing `fpgm' table.\n" ));
+
error = face->interpreter( exec );
+ }
}
else
error = TT_Err_Ok;
error = TT_Goto_CodeRange( exec, tt_coderange_cvt, 0 );
if ( !error && !size->debug )
+ {
+ FT_TRACE4(( "Executing `prep' table.\n" ));
+
error = face->interpreter( exec );
+ }
}
else
error = TT_Err_Ok;
/* Set default metrics */
{
- FT_Size_Metrics* metrics = &size->metrics;
- TT_Size_Metrics* metrics2 = &size->ttmetrics;
+ TT_Size_Metrics* metrics = &size->ttmetrics;
- metrics->x_ppem = 0;
- metrics->y_ppem = 0;
- metrics2->rotated = FALSE;
- metrics2->stretched = FALSE;
+ metrics->rotated = FALSE;
+ metrics->stretched = FALSE;
/* set default compensation (all 0) */
for ( i = 0; i < 4; i++ )
- metrics2->compensations[i] = 0;
+ metrics->compensations[i] = 0;
}
/* allocate function defs, instruction defs, cvt, and storage area */
if ( !size->cvt_ready )
{
FT_UInt i;
- TT_Face face = (TT_Face) size->root.face;
+ TT_Face face = (TT_Face)size->root.face;
/* Scale the cvt values to the new ppem. */
error = tt_size_run_prep( size );
if ( !error )
- size->cvt_ready = 1;
+ size->cvt_ready = 1;
}
+
Exit:
return error;
}
projects / reactos.git / blobdiff