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freetype2
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Code Issues 4 Releases Wiki Activity

[sfnt] Move `CPAL' stuff into separate files. 

* src/sfnt/sfdriver.c: Include `ttcpal.h'.
* src/sfnt/sfnt.c: Include `ttcpal.c'.

* src/sfnt/ttcolr.c, src/sfnt/ttcolr.h: Move CPAL stuff to ...
* src/sfnt/ttcpal.c, src/sfnt/ttcpal.c: ... these new files.

* src/sfnt/Jamfile (_sources), src/sfnt/rules.mk (SFNT_DRV_SRC):
Updated.

* include/freetype/internal/fttrace.h: Add support for `colr' and
`cpal'.
Sort entries.
This commit is contained in:
Werner Lemberg 2018-06-14 11:32:47 +02:00
parent 54b332aaf9
commit a44e20879c
10 changed files with 402 additions and 280 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ChangeLog
View File

@ -1,3 +1,20 @@
2018-06-14 Werner Lemberg <wl@gnu.org>
[sfnt] Move `CPAL' stuff into separate files.
* src/sfnt/sfdriver.c: Include `ttcpal.h'.
* src/sfnt/sfnt.c: Include `ttcpal.c'.
* src/sfnt/ttcolr.c, src/sfnt/ttcolr.h: Move CPAL stuff to ...
* src/sfnt/ttcpal.c, src/sfnt/ttcpal.c: ... these new files.
* src/sfnt/Jamfile (_sources), src/sfnt/rules.mk (SFNT_DRV_SRC):
Updated.
* include/freetype/internal/fttrace.h: Add support for `colr' and
`cpal'.
Sort entries.
2018-06-13 Werner Lemberg <wl@gnu.org>
[sfnt] Separate `CPAL' and `COLR' table handling.

52
include/freetype/internal/fttrace.h
View File

@ -23,23 +23,23 @@ FT_TRACE_DEF( any )
/* base components */
FT_TRACE_DEF( calc ) /* calculations (ftcalc.c) */
FT_TRACE_DEF( gloader ) /* glyph loader (ftgloadr.c) */
FT_TRACE_DEF( glyph ) /* glyph management (ftglyph.c) */
FT_TRACE_DEF( memory ) /* memory manager (ftobjs.c) */
FT_TRACE_DEF( stream ) /* stream manager (ftstream.c) */
FT_TRACE_DEF( init ) /* initialization (ftinit.c) */
FT_TRACE_DEF( io ) /* i/o interface (ftsystem.c) */
FT_TRACE_DEF( list ) /* list management (ftlist.c) */
FT_TRACE_DEF( init ) /* initialization (ftinit.c) */
FT_TRACE_DEF( objs ) /* base objects (ftobjs.c) */
FT_TRACE_DEF( outline ) /* outline management (ftoutln.c) */
FT_TRACE_DEF( glyph ) /* glyph management (ftglyph.c) */
FT_TRACE_DEF( gloader ) /* glyph loader (ftgloadr.c) */
FT_TRACE_DEF( stream ) /* stream manager (ftstream.c) */
FT_TRACE_DEF( bitmap ) /* bitmap checksum (ftobjs.c) */
FT_TRACE_DEF( mm ) /* MM interface (ftmm.c) */
FT_TRACE_DEF( psprops ) /* PS driver properties (ftpsprop.c) */
FT_TRACE_DEF( raccess ) /* resource fork accessor (ftrfork.c) */
FT_TRACE_DEF( raster ) /* monochrome rasterizer (ftraster.c) */
FT_TRACE_DEF( smooth ) /* anti-aliasing raster (ftgrays.c) */
FT_TRACE_DEF( mm ) /* MM interface (ftmm.c) */
FT_TRACE_DEF( raccess ) /* resource fork accessor (ftrfork.c) */
FT_TRACE_DEF( synth ) /* bold/slant synthesizer (ftsynth.c) */
FT_TRACE_DEF( bitmap ) /* bitmap checksum (ftobjs.c) */
FT_TRACE_DEF( psprops ) /* PS driver properties (ftpsprop.c) */
/* Cache sub-system */
FT_TRACE_DEF( cache ) /* cache sub-system (ftcache.c, etc.) */
@ -47,21 +47,23 @@ FT_TRACE_DEF( cache ) /* cache sub-system (ftcache.c, etc.) */
/* SFNT driver components */
FT_TRACE_DEF( sfdriver ) /* SFNT font driver (sfdriver.c) */
FT_TRACE_DEF( sfobjs ) /* SFNT object handler (sfobjs.c) */
FT_TRACE_DEF( ttbdf ) /* TrueType embedded BDF (ttbdf.c) */
FT_TRACE_DEF( ttcmap ) /* charmap handler (ttcmap.c) */
FT_TRACE_DEF( ttcolr ) /* glyph layer table (ttcolr.c) */
FT_TRACE_DEF( ttcpal ) /* color palette table (ttcpal.c) */
FT_TRACE_DEF( ttkern ) /* kerning handler (ttkern.c) */
FT_TRACE_DEF( ttload ) /* basic TrueType tables (ttload.c) */
FT_TRACE_DEF( ttmtx ) /* metrics-related tables (ttmtx.c) */
FT_TRACE_DEF( ttpost ) /* PS table processing (ttpost.c) */
FT_TRACE_DEF( ttsbit ) /* TrueType sbit handling (ttsbit.c) */
FT_TRACE_DEF( ttbdf ) /* TrueType embedded BDF (ttbdf.c) */
/* TrueType driver components */
FT_TRACE_DEF( ttdriver ) /* TT font driver (ttdriver.c) */
FT_TRACE_DEF( ttgload ) /* TT glyph loader (ttgload.c) */
FT_TRACE_DEF( ttgxvar ) /* TrueType GX var handler (ttgxvar.c) */
FT_TRACE_DEF( ttinterp ) /* bytecode interpreter (ttinterp.c) */
FT_TRACE_DEF( ttobjs ) /* TT objects manager (ttobjs.c) */
FT_TRACE_DEF( ttpload ) /* TT data/program loader (ttpload.c) */
FT_TRACE_DEF( ttgxvar ) /* TrueType GX var handler (ttgxvar.c) */
/* Type 1 driver components */
FT_TRACE_DEF( t1afm )
@ -72,14 +74,14 @@ FT_TRACE_DEF( t1objs )
FT_TRACE_DEF( t1parse )
/* PostScript helper module `psaux' */
FT_TRACE_DEF( t1decode )
FT_TRACE_DEF( cffdecode )
FT_TRACE_DEF( psobjs )
FT_TRACE_DEF( psconv )
FT_TRACE_DEF( psobjs )
FT_TRACE_DEF( t1decode )
/* PostScript hinting module `pshinter' */
FT_TRACE_DEF( pshrec )
FT_TRACE_DEF( pshalgo )
FT_TRACE_DEF( pshrec )
/* Type 2 driver components */
FT_TRACE_DEF( cffdriver )
@ -117,7 +119,6 @@ FT_TRACE_DEF( bdflib )
FT_TRACE_DEF( pfr )
/* OpenType validation components */
FT_TRACE_DEF( otvmodule )
FT_TRACE_DEF( otvcommon )
FT_TRACE_DEF( otvbase )
FT_TRACE_DEF( otvgdef )
@ -125,29 +126,30 @@ FT_TRACE_DEF( otvgpos )
FT_TRACE_DEF( otvgsub )
FT_TRACE_DEF( otvjstf )
FT_TRACE_DEF( otvmath )
FT_TRACE_DEF( otvmodule )
/* TrueTypeGX/AAT validation components */
FT_TRACE_DEF( gxvmodule )
FT_TRACE_DEF( gxvbsln )
FT_TRACE_DEF( gxvcommon )
FT_TRACE_DEF( gxvfeat )
FT_TRACE_DEF( gxvmort )
FT_TRACE_DEF( gxvmorx )
FT_TRACE_DEF( gxvbsln )
FT_TRACE_DEF( gxvjust )
FT_TRACE_DEF( gxvkern )
FT_TRACE_DEF( gxvopbd )
FT_TRACE_DEF( gxvtrak )
FT_TRACE_DEF( gxvprop )
FT_TRACE_DEF( gxvmodule )
FT_TRACE_DEF( gxvmort )
FT_TRACE_DEF( gxvmorx )
FT_TRACE_DEF( gxvlcar )
FT_TRACE_DEF( gxvopbd )
FT_TRACE_DEF( gxvprop )
FT_TRACE_DEF( gxvtrak )
/* autofit components */
FT_TRACE_DEF( afmodule )
FT_TRACE_DEF( afhints )
FT_TRACE_DEF( afcjk )
FT_TRACE_DEF( afglobal )
FT_TRACE_DEF( afhints )
FT_TRACE_DEF( afmodule )
FT_TRACE_DEF( aflatin )
FT_TRACE_DEF( aflatin2 )
FT_TRACE_DEF( afwarp )
FT_TRACE_DEF( afshaper )
FT_TRACE_DEF( afglobal )
FT_TRACE_DEF( afwarp )
/* END */

3
src/sfnt/Jamfile
View File

@ -22,12 +22,13 @@ SubDir FT2_TOP $(FT2_SRC_DIR) sfnt ;
sfobjs
ttbdf
ttcmap
ttcolr
ttcpal
ttkern
ttload
ttmtx
ttpost
ttsbit
ttcolr
;
}
else

21
src/sfnt/rules.mk
View File

@ -28,17 +28,18 @@ SFNT_COMPILE := $(CC) $(ANSIFLAGS) \
# SFNT driver sources (i.e., C files)
#
SFNT_DRV_SRC := $(SFNT_DIR)/ttload.c \
$(SFNT_DIR)/ttmtx.c \
$(SFNT_DIR)/ttcmap.c \
$(SFNT_DIR)/ttsbit.c \
$(SFNT_DIR)/ttcolr.c \
$(SFNT_DIR)/ttpost.c \
$(SFNT_DIR)/ttkern.c \
$(SFNT_DIR)/ttbdf.c \
$(SFNT_DIR)/sfobjs.c \
SFNT_DRV_SRC := $(SFNT_DIR)/pngshim.c \
$(SFNT_DIR)/sfdriver.c \
$(SFNT_DIR)/pngshim.c
$(SFNT_DIR)/sfobjs.c \
$(SFNT_DIR)/ttbdf.c \
$(SFNT_DIR)/ttcmap.c \
$(SFNT_DIR)/ttcolr.c \
$(SFNT_DIR)/ttcpal.c \
$(SFNT_DIR)/ttkern.c \
$(SFNT_DIR)/ttload.c \
$(SFNT_DIR)/ttmtx.c \
$(SFNT_DIR)/ttpost.c \
$(SFNT_DIR)/ttsbit.c
# SFNT driver headers
#

1
src/sfnt/sfdriver.c
View File

@ -34,6 +34,7 @@
#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
#include "ttcolr.h"
#include "ttcpal.h"
#endif
#ifdef TT_CONFIG_OPTION_POSTSCRIPT_NAMES

1
src/sfnt/sfnt.c
View File

@ -25,6 +25,7 @@
#include "ttbdf.c"
#include "ttcmap.c"
#include "ttcolr.c"
#include "ttcpal.c"
#include "ttkern.c"
#include "ttload.c"

234
src/sfnt/ttcolr.c
View File

@ -2,12 +2,12 @@
*
* ttcolr.c
*
* TrueType and OpenType color outline support.
* TrueType and OpenType colored glyph layer support (body).
*
* Copyright 2018 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* Written by Shao Yu Zhang <shaozhang@fb.com>.
* Originally written by Shao Yu Zhang <shaozhang@fb.com>.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
@ -20,10 +20,9 @@
/**************************************************************************
*
* `COLR' and `CPAL' table specification:
* `COLR' table specification:
*
* https://www.microsoft.com/typography/otspec/colr.htm
* https://www.microsoft.com/typography/otspec/cpal.htm
*
*/
@ -44,8 +43,6 @@
#define BASE_GLYPH_SIZE 6
#define LAYER_SIZE 4
#define COLR_HEADER_SIZE 14
#define CPAL_V0_HEADER_BASE_SIZE 12
#define COLOR_SIZE 4
typedef struct BaseGlyphRecord_
@ -57,22 +54,6 @@
} BaseGlyphRecord;
/* all data from `CPAL' not covered in FT_Palette_Data */
typedef struct Cpal_
{
FT_UShort version; /* Table version number (0 or 1 supported). */
FT_UShort num_colors; /* Total number of color records, */
/* combined for all palettes. */
FT_Byte* colors; /* RGBA array of colors */
FT_Byte* color_indices; /* Index of each palette's first color record */
/* in the combined color record array. */
/* The memory which backs up the `CPAL' table. */
void* table;
} Cpal;
typedef struct Colr_
{
FT_UShort version;
@ -95,161 +76,7 @@
* messages during execution.
*/
#undef FT_COMPONENT
#define FT_COMPONENT trace_ttcolrcpal
FT_LOCAL_DEF( FT_Error )
tt_face_load_cpal( TT_Face face,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory = face->root.memory;
FT_Byte* table = NULL;
FT_Byte* p = NULL;
Cpal* cpal = NULL;
FT_ULong colors_offset;
FT_ULong table_size;
error = face->goto_table( face, TTAG_CPAL, stream, &table_size );
if ( error )
goto NoCpal;
if ( table_size < CPAL_V0_HEADER_BASE_SIZE )
goto InvalidTable;
if ( FT_FRAME_EXTRACT( table_size, table ) )
goto NoCpal;
p = table;
if ( FT_NEW( cpal ) )
goto NoCpal;
cpal->version = FT_NEXT_USHORT( p );
if ( cpal->version > 1 )
goto InvalidTable;
face->palette_data.num_palette_entries = FT_NEXT_USHORT( p );
face->palette_data.num_palettes = FT_NEXT_USHORT( p );
cpal->num_colors = FT_NEXT_USHORT( p );
colors_offset = FT_NEXT_ULONG( p );
if ( colors_offset >= table_size )
goto InvalidTable;
if ( cpal->num_colors * COLOR_SIZE > table_size - colors_offset )
goto InvalidTable;
cpal->color_indices = p;
cpal->colors = (FT_Byte*)( table + colors_offset );
if ( cpal->version == 1 )
{
FT_ULong type_offset, label_offset, entry_label_offset;
FT_UShort* array = NULL;
FT_UShort* limit;
FT_UShort* q;
p += face->palette_data.num_palettes * 2;
type_offset = FT_NEXT_ULONG( p );
label_offset = FT_NEXT_ULONG( p );
entry_label_offset = FT_NEXT_ULONG( p );
if ( type_offset )
{
if ( type_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palettes * 2 >
table_size - type_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) )
goto NoCpal;
p = table + type_offset;
q = array;
limit = q + face->palette_data.num_palettes;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_types = array;
}
if ( label_offset )
{
if ( label_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palettes * 2 >
table_size - label_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) )
goto NoCpal;
p = table + label_offset;
q = array;
limit = q + face->palette_data.num_palettes;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_name_ids = array;
}
if ( entry_label_offset )
{
if ( entry_label_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palette_entries * 2 >
table_size - entry_label_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palette_entries ) )
goto NoCpal;
p = table + entry_label_offset;
q = array;
limit = q + face->palette_data.num_palette_entries;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_entry_name_ids = array;
}
}
cpal->table = table;
face->cpal = cpal;
/* set up default palette */
if ( FT_NEW_ARRAY( face->palette,
face->palette_data.num_palette_entries ) )
goto NoCpal;
tt_face_palette_set( face, 0 );
return FT_Err_Ok;
InvalidTable:
error = FT_THROW( Invalid_Table );
NoCpal:
FT_FRAME_RELEASE( table );
FT_FREE( cpal );
/* arrays in `face->palette_data' and `face->palette' */
/* are freed in `sfnt_done_face' */
return error;
}
#define FT_COMPONENT trace_ttcolr
FT_LOCAL_DEF( FT_Error )
@ -327,23 +154,6 @@
}
FT_LOCAL_DEF( void )
tt_face_free_cpal( TT_Face face )
{
FT_Stream stream = face->root.stream;
FT_Memory memory = face->root.memory;
Cpal* cpal = (Cpal*)face->cpal;
if ( cpal )
{
FT_FRAME_RELEASE( cpal->table );
FT_FREE( cpal );
}
}
FT_LOCAL_DEF( void )
tt_face_free_colr( TT_Face face )
{
@ -465,42 +275,6 @@
}
FT_LOCAL_DEF( FT_Error )
tt_face_palette_set( TT_Face face,
FT_UInt palette_index )
{
Cpal* cpal = (Cpal*)face->cpal;
FT_Byte* offset;
FT_Byte* p;
FT_Color* q;
FT_Color* limit;
if ( palette_index >= face->palette_data.num_palettes )
return FT_THROW( Invalid_Argument );
offset = cpal->color_indices + 2 * palette_index;
p = cpal->colors + COLOR_SIZE * FT_PEEK_USHORT( offset );
q = face->palette;
limit = q + face->palette_data.num_palette_entries;
while ( q < limit )
{
q->blue = FT_NEXT_BYTE( p );
q->green = FT_NEXT_BYTE( p );
q->red = FT_NEXT_BYTE( p );
q->alpha = FT_NEXT_BYTE( p );
q++;
}
return FT_Err_Ok;
}
FT_LOCAL_DEF( FT_Error )
tt_face_colr_blend_layer( TT_Face face,
FT_UInt color_index,

17
src/sfnt/ttcolr.h
View File

@ -1,13 +1,13 @@
/****************************************************************************
*
* ttsbit.h
* ttcolr.h
*
* TrueType and OpenType color outline support (specification).
* TrueType and OpenType colored glyph layer support (specification).
*
* Copyright 2018 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* Written by Shao Yu Zhang <shaozhang@fb.com>.
* Originally written by Shao Yu Zhang <shaozhang@fb.com>.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
@ -29,17 +29,10 @@
FT_BEGIN_HEADER
FT_LOCAL( FT_Error )
tt_face_load_cpal( TT_Face face,
FT_Stream stream );
FT_LOCAL( FT_Error )
tt_face_load_colr( TT_Face face,
FT_Stream stream );
FT_LOCAL( void )
tt_face_free_cpal( TT_Face face );
FT_LOCAL( void )
tt_face_free_colr( TT_Face face );
@ -49,10 +42,6 @@ FT_BEGIN_HEADER
FT_Glyph_Layer *ret_layers,
FT_UShort* ret_num_layers );
FT_LOCAL( FT_Error )
tt_face_palette_set( TT_Face face,
FT_UInt palette_index );
FT_LOCAL( FT_Error )
tt_face_colr_blend_layer( TT_Face face,
FT_UInt color_index,

287
src/sfnt/ttcpal.c Normal file
View File

@ -0,0 +1,287 @@
/****************************************************************************
*
* ttcpal.c
*
* TrueType and OpenType color palette support (body).
*
* Copyright 2018 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* Originally written by Shao Yu Zhang <shaozhang@fb.com>.
*
* 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.
*
*/
/**************************************************************************
*
* `CPAL' table specification:
*
* https://www.microsoft.com/typography/otspec/cpal.htm
*
*/
#include <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_TRUETYPE_TAGS_H
#include FT_COLOR_H
#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
#include "ttcpal.h"
/* NOTE: These are the table sizes calculated through the specs. */
#define CPAL_V0_HEADER_BASE_SIZE 12
#define COLOR_SIZE 4
/* all data from `CPAL' not covered in FT_Palette_Data */
typedef struct Cpal_
{
FT_UShort version; /* Table version number (0 or 1 supported). */
FT_UShort num_colors; /* Total number of color records, */
/* combined for all palettes. */
FT_Byte* colors; /* RGBA array of colors */
FT_Byte* color_indices; /* Index of each palette's first color record */
/* in the combined color record array. */
/* The memory which backs up the `CPAL' table. */
void* table;
} Cpal;
/**************************************************************************
*
* 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_ttcpal
FT_LOCAL_DEF( FT_Error )
tt_face_load_cpal( TT_Face face,
FT_Stream stream )
{
FT_Error error;
FT_Memory memory = face->root.memory;
FT_Byte* table = NULL;
FT_Byte* p = NULL;
Cpal* cpal = NULL;
FT_ULong colors_offset;
FT_ULong table_size;
error = face->goto_table( face, TTAG_CPAL, stream, &table_size );
if ( error )
goto NoCpal;
if ( table_size < CPAL_V0_HEADER_BASE_SIZE )
goto InvalidTable;
if ( FT_FRAME_EXTRACT( table_size, table ) )
goto NoCpal;
p = table;
if ( FT_NEW( cpal ) )
goto NoCpal;
cpal->version = FT_NEXT_USHORT( p );
if ( cpal->version > 1 )
goto InvalidTable;
face->palette_data.num_palette_entries = FT_NEXT_USHORT( p );
face->palette_data.num_palettes = FT_NEXT_USHORT( p );
cpal->num_colors = FT_NEXT_USHORT( p );
colors_offset = FT_NEXT_ULONG( p );
if ( colors_offset >= table_size )
goto InvalidTable;
if ( cpal->num_colors * COLOR_SIZE > table_size - colors_offset )
goto InvalidTable;
cpal->color_indices = p;
cpal->colors = (FT_Byte*)( table + colors_offset );
if ( cpal->version == 1 )
{
FT_ULong type_offset, label_offset, entry_label_offset;
FT_UShort* array = NULL;
FT_UShort* limit;
FT_UShort* q;
p += face->palette_data.num_palettes * 2;
type_offset = FT_NEXT_ULONG( p );
label_offset = FT_NEXT_ULONG( p );
entry_label_offset = FT_NEXT_ULONG( p );
if ( type_offset )
{
if ( type_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palettes * 2 >
table_size - type_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) )
goto NoCpal;
p = table + type_offset;
q = array;
limit = q + face->palette_data.num_palettes;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_types = array;
}
if ( label_offset )
{
if ( label_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palettes * 2 >
table_size - label_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palettes ) )
goto NoCpal;
p = table + label_offset;
q = array;
limit = q + face->palette_data.num_palettes;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_name_ids = array;
}
if ( entry_label_offset )
{
if ( entry_label_offset >= table_size )
goto InvalidTable;
if ( face->palette_data.num_palette_entries * 2 >
table_size - entry_label_offset )
goto InvalidTable;
if ( FT_QNEW_ARRAY( array, face->palette_data.num_palette_entries ) )
goto NoCpal;
p = table + entry_label_offset;
q = array;
limit = q + face->palette_data.num_palette_entries;
while ( q < limit )
*q++ = FT_NEXT_USHORT( p );
face->palette_data.palette_entry_name_ids = array;
}
}
cpal->table = table;
face->cpal = cpal;
/* set up default palette */
if ( FT_NEW_ARRAY( face->palette,
face->palette_data.num_palette_entries ) )
goto NoCpal;
tt_face_palette_set( face, 0 );
return FT_Err_Ok;
InvalidTable:
error = FT_THROW( Invalid_Table );
NoCpal:
FT_FRAME_RELEASE( table );
FT_FREE( cpal );
/* arrays in `face->palette_data' and `face->palette' */
/* are freed in `sfnt_done_face' */
return error;
}
FT_LOCAL_DEF( void )
tt_face_free_cpal( TT_Face face )
{
FT_Stream stream = face->root.stream;
FT_Memory memory = face->root.memory;
Cpal* cpal = (Cpal*)face->cpal;
if ( cpal )
{
FT_FRAME_RELEASE( cpal->table );
FT_FREE( cpal );
}
}
FT_LOCAL_DEF( FT_Error )
tt_face_palette_set( TT_Face face,
FT_UInt palette_index )
{
Cpal* cpal = (Cpal*)face->cpal;
FT_Byte* offset;
FT_Byte* p;
FT_Color* q;
FT_Color* limit;
if ( palette_index >= face->palette_data.num_palettes )
return FT_THROW( Invalid_Argument );
offset = cpal->color_indices + 2 * palette_index;
p = cpal->colors + COLOR_SIZE * FT_PEEK_USHORT( offset );
q = face->palette;
limit = q + face->palette_data.num_palette_entries;
while ( q < limit )
{
q->blue = FT_NEXT_BYTE( p );
q->green = FT_NEXT_BYTE( p );
q->red = FT_NEXT_BYTE( p );
q->alpha = FT_NEXT_BYTE( p );
q++;
}
return FT_Err_Ok;
}
#else /* !TT_CONFIG_OPTION_COLOR_LAYERS */
/* ANSI C doesn't like empty source files */
typedef int _tt_cpal_dummy;
#endif /* !TT_CONFIG_OPTION_COLOR_LAYERS */
/* EOF */

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src/sfnt/ttcpal.h Normal file
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/****************************************************************************
*
* ttcpal.h
*
* TrueType and OpenType color palette support (specification).
*
* Copyright 2018 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* Originally written by Shao Yu Zhang <shaozhang@fb.com>.
*
* 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.
*
*/
#ifndef __TTCPAL_H__
#define __TTCPAL_H__
#include <ft2build.h>
#include "ttload.h"
FT_BEGIN_HEADER
FT_LOCAL( FT_Error )
tt_face_load_cpal( TT_Face face,
FT_Stream stream );
FT_LOCAL( void )
tt_face_free_cpal( TT_Face face );
FT_LOCAL( FT_Error )
tt_face_palette_set( TT_Face face,
FT_UInt palette_index );
FT_END_HEADER
#endif /* __TTCPAL_H__ */
/* END */