FT_FRAME_START( PCF_PROPERTY_SIZE ),
FT_FRAME_LONG_LE( name ),
FT_FRAME_BYTE ( isString ),
FT_FRAME_LONG_LE( value ),
FT_FRAME_END
};
static
const FT_Frame_Field pcf_property_msb_header[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE PCF_ParsePropertyRec
FT_FRAME_START( PCF_PROPERTY_SIZE ),
FT_FRAME_LONG( name ),
FT_FRAME_BYTE( isString ),
FT_FRAME_LONG( value ),
FT_FRAME_END
};
FT_LOCAL_DEF( PCF_Property )
pcf_find_property( PCF_Face face,
const FT_String* prop )
{
PCF_Property properties = face->properties;
FT_Bool found = 0;
int i;
tt_face_load_maxp( TT_Face face,
FT_Stream stream )
{
FT_Error error;
TT_MaxProfile* maxProfile = &face->max_profile;
static const FT_Frame_Field maxp_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TT_MaxProfile
FT_FRAME_START( 6 ),
FT_FRAME_LONG ( version ),
FT_FRAME_USHORT( numGlyphs ),
FT_FRAME_END
};
static const FT_Frame_Field maxp_fields_extra[] =
{
FT_FRAME_START( 26 ),
FT_FRAME_USHORT( maxPoints ),
FT_FRAME_USHORT( maxContours ),
FT_FRAME_USHORT( maxCompositePoints ),
FT_FRAME_USHORT( maxCompositeContours ),
FT_FRAME_USHORT( maxZones ),
FT_FRAME_USHORT( maxTwilightPoints ),
FT_FRAME_USHORT( maxStorage ),
FT_FRAME_USHORT( maxFunctionDefs ),
FT_FRAME_USHORT( maxInstructionDefs ),
FT_FRAME_USHORT( maxStackElements ),
FT_FRAME_USHORT( maxSizeOfInstructions ),
FT_FRAME_USHORT( maxComponentElements ),
FT_FRAME_USHORT( maxComponentDepth ),
FT_FRAME_END
};
error = face->goto_table( face, TTAG_maxp, stream, 0 );
if ( error )
goto Exit;
if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
goto Exit;
maxProfile->maxPoints = 0;
maxProfile->maxContours = 0;
maxProfile->maxCompositePoints = 0;
maxProfile->maxCompositeContours = 0;
maxProfile->maxZones = 0;
maxProfile->maxTwilightPoints = 0;
maxProfile->maxStorage = 0;
maxProfile->maxFunctionDefs = 0;
maxProfile->maxInstructionDefs = 0;
maxProfile->maxStackElements = 0;
maxProfile->maxSizeOfInstructions = 0;
maxProfile->maxComponentElements = 0;
maxProfile->maxComponentDepth = 0;
if ( maxProfile->version >= 0x10000L )
{
if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
goto Exit;
/* XXX: an adjustment that is necessary to load certain */
/* broken fonts like `Keystrokes MT' :-( */
/* */
/* We allocate 64 function entries by default when */
/* the maxFunctionDefs value is smaller. */
if ( maxProfile->maxFunctionDefs < 64 )
maxProfile->maxFunctionDefs = 64;
/* we add 4 phantom points later */
if ( maxProfile->maxTwilightPoints > ( 0xFFFFU - 4 ) )
{
FT_TRACE0(( "tt_face_load_maxp:"
" too much twilight points in `maxp' table;\n"
" "
" some glyphs might be rendered incorrectly\n" ));
maxProfile->maxTwilightPoints = 0xFFFFU - 4;
}
/* we arbitrarily limit recursion to avoid stack exhaustion */
if ( maxProfile->maxComponentDepth > 100 )
{
FT_TRACE0(( "tt_face_load_maxp:"
" abnormally large component depth (%d) set to 100\n",
maxProfile->maxComponentDepth ));
maxProfile->maxComponentDepth = 100;
}
}
FT_TRACE3(( "numGlyphs: %u\n", maxProfile->numGlyphs ));
Exit:
return error;
}
/* synthesized into a TTC with one offset table. */
static FT_Error
sfnt_open_font( FT_Stream stream,
TT_Face face )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_ULong tag, offset;
static const FT_Frame_Field ttc_header_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TTC_HeaderRec
FT_FRAME_START( 8 ),
FT_FRAME_LONG( version ),
FT_FRAME_LONG( count ),
FT_FRAME_END
};
face->ttc_header.tag = 0;
face->ttc_header.version = 0;
face->ttc_header.count = 0;
offset = FT_STREAM_POS();
if ( FT_READ_ULONG( tag ) )
return error;
if ( tag != 0x00010000UL &&
tag != TTAG_ttcf &&
tag != TTAG_OTTO &&
tag != TTAG_true &&
tag != TTAG_typ1 &&
tag != 0x00020000UL )
return SFNT_Err_Unknown_File_Format;
face->ttc_header.tag = TTAG_ttcf;
if ( tag == TTAG_ttcf )
{
FT_Int n;
FT_TRACE3(( "sfnt_open_font: file is a collection\n" ));
if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) )
return error;
/* now read the offsets of each font in the file */
if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) )
return error;
if ( FT_FRAME_ENTER( face->ttc_header.count * 4L ) )
return error;
for ( n = 0; n < face->ttc_header.count; n++ )
face->ttc_header.offsets[n] = FT_GET_ULONG();
FT_FRAME_EXIT();
}
else
{
FT_TRACE3(( "sfnt_open_font: synthesize TTC\n" ));
face->ttc_header.version = 1 << 16;
face->ttc_header.count = 1;
if ( FT_NEW( face->ttc_header.offsets ) )
return error;
face->ttc_header.offsets[0] = offset;
}
return error;
}
tt_face_load_maxp( TT_Face face,
FT_Stream stream )
{
FT_Error error;
TT_MaxProfile* maxProfile = &face->max_profile;
const FT_Frame_Field maxp_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TT_MaxProfile
FT_FRAME_START( 6 ),
FT_FRAME_LONG ( version ),
FT_FRAME_USHORT( numGlyphs ),
FT_FRAME_END
};
const FT_Frame_Field maxp_fields_extra[] =
{
FT_FRAME_START( 26 ),
FT_FRAME_USHORT( maxPoints ),
FT_FRAME_USHORT( maxContours ),
FT_FRAME_USHORT( maxCompositePoints ),
FT_FRAME_USHORT( maxCompositeContours ),
FT_FRAME_USHORT( maxZones ),
FT_FRAME_USHORT( maxTwilightPoints ),
FT_FRAME_USHORT( maxStorage ),
FT_FRAME_USHORT( maxFunctionDefs ),
FT_FRAME_USHORT( maxInstructionDefs ),
FT_FRAME_USHORT( maxStackElements ),
FT_FRAME_USHORT( maxSizeOfInstructions ),
FT_FRAME_USHORT( maxComponentElements ),
FT_FRAME_USHORT( maxComponentDepth ),
FT_FRAME_END
};
error = face->goto_table( face, TTAG_maxp, stream, 0 );
if ( error )
goto Exit;
if ( FT_STREAM_READ_FIELDS( maxp_fields, maxProfile ) )
goto Exit;
maxProfile->maxPoints = 0;
maxProfile->maxContours = 0;
maxProfile->maxCompositePoints = 0;
maxProfile->maxCompositeContours = 0;
maxProfile->maxZones = 0;
maxProfile->maxTwilightPoints = 0;
maxProfile->maxStorage = 0;
maxProfile->maxFunctionDefs = 0;
maxProfile->maxInstructionDefs = 0;
maxProfile->maxStackElements = 0;
maxProfile->maxSizeOfInstructions = 0;
maxProfile->maxComponentElements = 0;
maxProfile->maxComponentDepth = 0;
if ( maxProfile->version >= 0x10000L )
{
if ( FT_STREAM_READ_FIELDS( maxp_fields_extra, maxProfile ) )
goto Exit;
/* XXX: an adjustment that is necessary to load certain */
/* broken fonts like `Keystrokes MT' :-( */
/* */
/* We allocate 64 function entries by default when */
/* the maxFunctionDefs field is null. */
if ( maxProfile->maxFunctionDefs == 0 )
maxProfile->maxFunctionDefs = 64;
}
FT_TRACE3(( "numGlyphs: %u\n", maxProfile->numGlyphs ));
Exit:
return error;
}
/* synthesized into a TTC with one offset table. */
static FT_Error
sfnt_open_font( FT_Stream stream,
TT_Face face )
{
FT_Memory memory = stream->memory;
FT_Error error;
FT_ULong tag, offset;
static const FT_Frame_Field ttc_header_fields[] =
{
#undef FT_STRUCTURE
#define FT_STRUCTURE TTC_HeaderRec
FT_FRAME_START( 8 ),
FT_FRAME_LONG( version ),
FT_FRAME_LONG( count ), /* this is ULong in the specs */
FT_FRAME_END
};
face->ttc_header.tag = 0;
face->ttc_header.version = 0;
face->ttc_header.count = 0;
retry:
offset = FT_STREAM_POS();
if ( FT_READ_ULONG( tag ) )
return error;
if ( tag == TTAG_wOFF )
{
FT_TRACE2(( "sfnt_open_font: file is a WOFF; synthesizing SFNT\n" ));
if ( FT_STREAM_SEEK( offset ) )
return error;
error = woff_open_font( stream, face );
if ( error )
return error;
/* Swap out stream and retry! */
stream = face->root.stream;
goto retry;
}
if ( tag != 0x00010000UL &&
tag != TTAG_ttcf &&
tag != TTAG_OTTO &&
tag != TTAG_true &&
tag != TTAG_typ1 &&
tag != 0x00020000UL )
{
FT_TRACE2(( " not a font using the SFNT container format\n" ));
return FT_THROW( Unknown_File_Format );
}
face->ttc_header.tag = TTAG_ttcf;
if ( tag == TTAG_ttcf )
{
FT_Int n;
FT_TRACE3(( "sfnt_open_font: file is a collection\n" ));
if ( FT_STREAM_READ_FIELDS( ttc_header_fields, &face->ttc_header ) )
return error;
if ( face->ttc_header.count == 0 )
return FT_THROW( Invalid_Table );
/* a rough size estimate: let's conservatively assume that there */
/* is just a single table info in each subfont header (12 + 16*1 = */
/* 28 bytes), thus we have (at least) `12 + 4*count' bytes for the */
/* size of the TTC header plus `28*count' bytes for all subfont */
/* headers */
if ( (FT_ULong)face->ttc_header.count > stream->size / ( 28 + 4 ) )
return FT_THROW( Array_Too_Large );
/* now read the offsets of each font in the file */
if ( FT_NEW_ARRAY( face->ttc_header.offsets, face->ttc_header.count ) )
return error;
if ( FT_FRAME_ENTER( face->ttc_header.count * 4L ) )
return error;
for ( n = 0; n < face->ttc_header.count; n++ )
face->ttc_header.offsets[n] = FT_GET_ULONG();
FT_FRAME_EXIT();
}
else
{
FT_TRACE3(( "sfnt_open_font: synthesize TTC\n" ));
face->ttc_header.version = 1 << 16;
face->ttc_header.count = 1;
if ( FT_NEW( face->ttc_header.offsets ) )
return error;
face->ttc_header.offsets[0] = offset;
}
return error;
}
