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Simplified the incremental loading system for CFF fonts and fixed

Browse Source 
a problem with the handling of the deprecated version of the Type 2
endchar command, that emulates Type 1 'seac'.
This version now works with the GhostScript-to-FreeType bridge
currently under development.
BRANCH-2-1-5
Graham Asher 23 years ago
parent 2a54188114
commit 2bf4825234
4 changed files with 50 additions and 61 deletions
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  1. 68
      src/cff/cffgload.c
  2. 38
      src/cff/cffload.c
  3. 3
      src/cff/cffload.h
  4. 2
      src/cff/cffobjs.c

68
src/cff/cffgload.c
Unescape View File

@ -570,25 +570,20 @@
/* For incremental fonts get the character data using the */
/* callback function. */
if ( face->root.internal->incremental_interface )
{
FT_Data data;
FT_Error error = face->root.internal->incremental_interface->funcs->get_glyph_data(
face->root.internal->incremental_interface->object,
glyph_index, &data );
{
FT_Data data;
FT_Error error = face->root.internal->incremental_interface->funcs->get_glyph_data(
face->root.internal->incremental_interface->object,
glyph_index, &data );
*pointer = (FT_Byte*)data.pointer;
*length = data.length;
*length = data.length;
return error;
}
else
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
{
CFF_Font cff = (CFF_Font)(face->extra.data);
CFF_Font cff = (CFF_Font)(face->extra.data);
return cff_index_access_element( &cff->charstrings_index, glyph_index,
pointer, length );
}
@ -608,12 +603,10 @@
/* For incremental fonts get the character data using the */
/* callback function. */
if ( face->root.internal->incremental_interface )
{
FT_Data data;
data.pointer = *pointer;
data.length = length;
{
FT_Data data;
data.pointer = *pointer;
data.length = length;
face->root.internal->incremental_interface->funcs->free_glyph_data(
face->root.internal->incremental_interface->object,&data );
}
@ -621,9 +614,7 @@
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
{
CFF_Font cff = (CFF_Font)(face->extra.data);
CFF_Font cff = (CFF_Font)(face->extra.data);
cff_index_forget_element( &cff->charstrings_index, pointer );
}
}
@ -640,14 +631,26 @@
FT_Int bchar_index, achar_index, n_base_points;
FT_Outline* base = decoder->builder.base;
TT_Face face = decoder->builder.face;
CFF_Font cff = (CFF_Font)(face->extra.data);
FT_Vector left_bearing, advance;
FT_Byte* charstring;
FT_ULong charstring_len;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Incremental fonts don't necessarily have valid charsets. */
/* They use the character code, not the glyph index, in this case. */
if ( face->root.internal->incremental_interface )
{
bchar_index = bchar;
achar_index = achar;
}
else
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
{
CFF_Font cff = (CFF_Font)(face->extra.data);
bchar_index = cff_lookup_glyph_by_stdcharcode( cff, bchar );
achar_index = cff_lookup_glyph_by_stdcharcode( cff, achar );
bchar_index = cff_lookup_glyph_by_stdcharcode( cff, bchar );
achar_index = cff_lookup_glyph_by_stdcharcode( cff, achar );
}
if ( bchar_index < 0 || achar_index < 0 )
{
@ -699,7 +702,8 @@
&charstring, &charstring_len );
if ( !error )
{
error = cff_decoder_parse_charstrings( decoder, charstring, charstring_len );
error = cff_decoder_parse_charstrings( decoder, charstring,
charstring_len );
if ( error )
goto Exit;
@ -2312,7 +2316,7 @@
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Control data and length may not be available for incremental */
/* Control data and length may not be available for incremental */
/* fonts. */
if ( face->root.internal->incremental_interface )
{
@ -2326,13 +2330,11 @@
/* See how charstring loads at cff_index_access_element() in */
/* cffload.c. */
{
CFF_IndexRec csindex = cff->charstrings_index;
glyph->root.control_data =
csindex.bytes + csindex.offsets[glyph_index] - 1;
glyph->root.control_len =
charstring_len;
CFF_IndexRec csindex = cff->charstrings_index;
glyph->root.control_data =
csindex.bytes + csindex.offsets[glyph_index] - 1;
glyph->root.control_len =
charstring_len;
}
}

38
src/cff/cffload.c
Unescape View File

@ -2027,8 +2027,7 @@
FT_LOCAL_DEF( FT_Error )
cff_font_load( FT_Stream stream,
FT_Int face_index,
CFF_Font font,
CFF_Face face )
CFF_Font font )
{
static const FT_Frame_Field cff_header_fields[] =
{
@ -2048,11 +2047,6 @@
FT_ULong base_offset;
CFF_FontRecDict dict;
#ifndef FT_CONFIG_OPTION_INCREMENTAL
FT_UNUSED( face );
#endif
FT_ZERO( font );
font->stream = stream;
@ -2164,26 +2158,20 @@
else
font->num_subfonts = 0;
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Incremental fonts don't need character recipes. */
if ( !face->root.internal->incremental_interface )
#endif
/* read the charstrings index now */
if ( dict->charstrings_offset == 0 )
{
/* read the charstrings index now */
if ( dict->charstrings_offset == 0 )
{
FT_ERROR(( "cff_font_load: no charstrings offset!\n" ));
error = CFF_Err_Unknown_File_Format;
goto Exit;
}
FT_ERROR(( "cff_font_load: no charstrings offset!\n" ));
error = CFF_Err_Unknown_File_Format;
goto Exit;
}
if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) )
goto Exit;
if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) )
goto Exit;
error = cff_new_index( &font->charstrings_index, stream, 0 );
if ( error )
goto Exit;
}
error = cff_new_index( &font->charstrings_index, stream, 0 );
if ( error )
goto Exit;
/* explicit the global subrs */
font->num_global_subrs = font->global_subrs_index.count;
@ -2199,7 +2187,7 @@
if ( font->num_glyphs > 0 )
{
error = cff_charset_load( &font->charset, font->num_glyphs, stream,
base_offset, dict->charset_offset );
base_offset, dict->charset_offset );
if ( error )
goto Exit;

3
src/cff/cffload.h
Unescape View File

@ -55,8 +55,7 @@ FT_BEGIN_HEADER
FT_LOCAL( FT_Error )
cff_font_load( FT_Stream stream,
FT_Int face_index,
CFF_Font font,
CFF_Face face );
CFF_Font font );
FT_LOCAL( void )
cff_font_done( CFF_Font font );

2
src/cff/cffobjs.c
Unescape View File

@ -342,7 +342,7 @@
goto Exit;
face->extra.data = cff;
error = cff_font_load( stream, face_index, cff, face );
error = cff_font_load( stream, face_index, cff );
if ( error )
goto Exit;

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