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-rw-r--r--src/truetype/ttobjs.c206
1 files changed, 175 insertions, 31 deletions
diff --git a/src/truetype/ttobjs.c b/src/truetype/ttobjs.c
index 8fe86ad..d77c3c4 100644
--- a/src/truetype/ttobjs.c
+++ b/src/truetype/ttobjs.c
@@ -4,8 +4,7 @@
/* */
/* Objects manager (body). */
/* */
-/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */
-/* 2010 by */
+/* Copyright 1996-2011 */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -214,16 +213,18 @@
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
- else if ( !face->goto_table )
+ if ( !face->goto_table )
return 0;
- else if ( !face->goto_table( face,
- face->dir_tables[i].Tag,
- face->root.stream,
- NULL ) )
+ 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,
@@ -243,7 +244,7 @@
tt_check_trickyness_sfnt_ids( TT_Face face )
{
#define TRICK_SFNT_IDS_PER_FACE 3
-#define TRICK_SFNT_IDS_NUM_FACES 5
+#define TRICK_SFNT_IDS_NUM_FACES 13
static const tt_sfnt_id_rec sfnt_id[TRICK_SFNT_IDS_NUM_FACES]
[TRICK_SFNT_IDS_PER_FACE] = {
@@ -276,16 +277,61 @@
{ 0xfffbfffc, 0x00000008 }, /* cvt */
{ 0x0a5a0483, 0x00017c39 }, /* fpgm */
{ 0x70020112, 0x00000008 } /* prep */
+ },
+ { /* NEC fadpop7.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x40c92555, 0x000000e5 }, /* fpgm */
+ { 0xa39b58e3, 0x0000117c } /* prep */
+ },
+ { /* NEC fadrei5.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x33c41652, 0x000000e5 }, /* fpgm */
+ { 0x26d6c52a, 0x00000f6a } /* prep */
+ },
+ { /* NEC fangot7.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x6db1651d, 0x0000019d }, /* fpgm */
+ { 0x6c6e4b03, 0x00002492 } /* prep */
+ },
+ { /* NEC fangyo5.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x40c92555, 0x000000e5 }, /* fpgm */
+ { 0xde51fad0, 0x0000117c } /* prep */
+ },
+ { /* NEC fankyo5.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x85e47664, 0x000000e5 }, /* fpgm */
+ { 0xa6c62831, 0x00001caa } /* prep */
+ },
+ { /* NEC fanrgo5.ttf */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x2d891cfd, 0x0000019d }, /* fpgm */
+ { 0xa0604633, 0x00001de8 } /* prep */
+ },
+ { /* NEC fangot5.ttc */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x40aa774c, 0x000001cb }, /* fpgm */
+ { 0x9b5caa96, 0x00001f9a } /* prep */
+ },
+ { /* NEC fanmin3.ttc */
+ { 0x00000000, 0x00000000 }, /* cvt */
+ { 0x0d3de9cb, 0x00000141 }, /* fpgm */
+ { 0xd4127766, 0x00002280 } /* prep */
}
};
- FT_ULong checksum;
- int num_matched_ids[TRICK_SFNT_IDS_NUM_FACES];
- int i, j, k;
+ 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++ )
{
@@ -295,14 +341,17 @@
{
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:
@@ -323,6 +372,18 @@
}
}
+ 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;
}
@@ -333,14 +394,10 @@
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;
- }
+ /* 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 */
@@ -352,6 +409,54 @@
}
+ /* 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> */
@@ -447,6 +552,20 @@
if ( !error )
error = tt_face_load_prep( face, stream );
+ /* Check the scalable flag based on `loca'. */
+ if ( !ttface->internal->incremental_interface &&
+ ttface->num_fixed_sizes &&
+ face->glyph_locations &&
+ tt_check_single_notdef( ttface ) )
+ {
+ FT_TRACE5(( "tt_face_init:"
+ " Only the `.notdef' glyph has an outline.\n"
+ " "
+ " Resetting scalable flag to FALSE.\n" ));
+
+ ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
+ }
+
#else
if ( !error )
@@ -458,6 +577,19 @@
if ( !error )
error = tt_face_load_prep( face, stream );
+ /* Check the scalable flag based on `loca'. */
+ if ( ttface->num_fixed_sizes &&
+ face->glyph_locations &&
+ tt_check_single_notdef( ttface ) )
+ {
+ FT_TRACE5(( "tt_face_init:"
+ " Only the `.notdef' glyph has an outline.\n"
+ " "
+ " Resetting scalable flag to FALSE.\n" ));
+
+ ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
+ }
+
#endif
}
@@ -570,13 +702,16 @@
/* Run the font program. */
/* */
/* <Input> */
- /* size :: A handle to the size object. */
+ /* 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 )
+ tt_size_run_fpgm( TT_Size size,
+ FT_Bool pedantic )
{
TT_Face face = (TT_Face)size->root.face;
TT_ExecContext exec;
@@ -594,15 +729,17 @@
TT_Load_Context( exec, face, size );
- exec->callTop = 0;
- exec->top = 0;
+ exec->callTop = 0;
+ exec->top = 0;
exec->period = 64;
exec->phase = 0;
exec->threshold = 0;
exec->instruction_trap = FALSE;
- exec->F_dot_P = 0x10000L;
+ exec->F_dot_P = 0x10000L;
+
+ exec->pedantic_hinting = pedantic;
{
FT_Size_Metrics* metrics = &exec->metrics;
@@ -659,13 +796,16 @@
/* Run the control value program. */
/* */
/* <Input> */
- /* size :: A handle to the size object. */
+ /* 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 )
+ tt_size_run_prep( TT_Size size,
+ FT_Bool pedantic )
{
TT_Face face = (TT_Face)size->root.face;
TT_ExecContext exec;
@@ -688,6 +828,8 @@
exec->instruction_trap = FALSE;
+ exec->pedantic_hinting = pedantic;
+
TT_Set_CodeRange( exec,
tt_coderange_cvt,
face->cvt_program,
@@ -766,7 +908,8 @@
/* 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 )
+ tt_size_init_bytecode( FT_Size ftsize,
+ FT_Bool pedantic )
{
FT_Error error;
TT_Size size = (TT_Size)ftsize;
@@ -839,7 +982,7 @@
}
/* Fine, now run the font program! */
- error = tt_size_run_fpgm( size );
+ error = tt_size_run_fpgm( size, pedantic );
Exit:
if ( error )
@@ -850,14 +993,15 @@
FT_LOCAL_DEF( FT_Error )
- tt_size_ready_bytecode( TT_Size size )
+ tt_size_ready_bytecode( TT_Size size,
+ FT_Bool pedantic )
{
FT_Error error = TT_Err_Ok;
if ( !size->bytecode_ready )
{
- error = tt_size_init_bytecode( (FT_Size)size );
+ error = tt_size_init_bytecode( (FT_Size)size, pedantic );
if ( error )
goto Exit;
}
@@ -889,7 +1033,7 @@
size->GS = tt_default_graphics_state;
- error = tt_size_run_prep( size );
+ error = tt_size_run_prep( size, pedantic );
if ( !error )
size->cvt_ready = 1;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 20:52:59 +0000