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[sfnt] Load variation store for 'COLR' v1. 

* src/sfnt/ttcolr.c: Include `ttobjs.h` temporarily.
(VARIABLE_COLRV1_ENABLED): New temporary macro to detect whether variable
COLRv1 is enabled.
(Colr): New fields `var_store` and `delta_set_idx_map`.
(tt_face_load_colr, tt_face_free_colr) [VARIABLE_COLRV1_ENABLED]: Load and
free variation store data using the functions from the Multiple Masters
service.
This commit is contained in:
Dominik Röttsches 2022-06-29 16:01:13 +03:00 committed by Werner Lemberg
parent 1a242558be
commit 31b14fd4dc
1 changed files with 100 additions and 0 deletions
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100
src/sfnt/ttcolr.c
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@ -30,10 +30,15 @@
#include <freetype/internal/ftcalc.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include <freetype/internal/services/svmm.h>
#include <freetype/tttags.h>
#include <freetype/ftcolor.h>
#include <freetype/config/integer-types.h>
/* the next code line is a temporary hack, to be removed together with */
/* `VARIABLE_COLRV1_ENABLED` and related code */
#include "../truetype/ttobjs.h"
#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
@ -50,6 +55,10 @@
#define COLR_HEADER_SIZE 14U
#define VARIABLE_COLRV1_ENABLED \
( ((TT_Driver)FT_FACE_DRIVER( face ))->enable_variable_colrv1 )
typedef enum FT_PaintFormat_Internal_
{
FT_COLR_PAINTFORMAT_INTERNAL_SCALE_CENTER = 18,
@ -104,6 +113,10 @@
*/
FT_Byte* paints_start_v1;
/* Item Variation Store for variable 'COLR' v1. */
GX_ItemVarStoreRec var_store;
GX_DeltaSetIdxMapRec delta_set_idx_map;
/* The memory that backs up the `COLR' table. */
void* table;
FT_ULong table_size;
@ -138,7 +151,9 @@
FT_ULong base_glyph_offset, layer_offset;
FT_ULong base_glyphs_offset_v1, num_base_glyphs_v1;
FT_ULong layer_offset_v1, num_layers_v1, clip_list_offset;
FT_ULong var_idx_map_offset, var_store_offset;
FT_ULong table_size;
FT_ULong colr_offset_in_stream;
/* `COLR' always needs `CPAL' */
@ -149,6 +164,8 @@
if ( error )
goto NoColr;
colr_offset_in_stream = FT_STREAM_POS();
if ( table_size < COLR_HEADER_SIZE )
goto InvalidTable;
@ -239,6 +256,64 @@
colr->clip_list = (FT_Byte*)( table + clip_list_offset );
else
colr->clip_list = 0;
colr->var_store.dataCount = 0;
colr->var_store.varData = NULL;
colr->var_store.axisCount = 0;
colr->var_store.regionCount = 0;
colr->var_store.varRegionList = 0;
colr->delta_set_idx_map.mapCount = 0;
colr->delta_set_idx_map.outerIndex = NULL;
colr->delta_set_idx_map.innerIndex = NULL;
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( face->variation_support & TT_FACE_FLAG_VAR_FVAR &&
VARIABLE_COLRV1_ENABLED )
{
FT_Service_MultiMasters mm = (FT_Service_MultiMasters)face->mm;
var_idx_map_offset = FT_NEXT_ULONG( p );
if ( var_idx_map_offset >= table_size )
goto InvalidTable;
var_store_offset = FT_NEXT_ULONG( p );
if ( var_store_offset >= table_size )
goto InvalidTable;
if ( var_store_offset )
{
/* If variation info has not been initialized yet, try doing so, */
/* otherwise loading the variation store will fail as it */
/* requires access to `blend` for checking the number of axes. */
if ( !face->blend )
if ( mm->get_mm_var( FT_FACE( face ), NULL ) )
goto InvalidTable;
/* Try loading `VarIdxMap` and `VarStore`. */
error = mm->load_item_var_store(
FT_FACE( face ),
colr_offset_in_stream + var_store_offset,
&colr->var_store );
if ( error != FT_Err_Ok )
goto InvalidTable;
}
if ( colr->var_store.axisCount && var_idx_map_offset )
{
error = mm->load_delta_set_idx_map(
FT_FACE( face ),
colr_offset_in_stream + var_idx_map_offset,
&colr->delta_set_idx_map,
&colr->var_store,
table_size );
if ( error != FT_Err_Ok )
goto InvalidTable;
}
}
#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */
}
colr->base_glyphs = (FT_Byte*)( table + base_glyph_offset );
@ -251,6 +326,19 @@
return FT_Err_Ok;
InvalidTable:
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( VARIABLE_COLRV1_ENABLED )
{
FT_Service_MultiMasters mm = (FT_Service_MultiMasters)face->mm;
mm->done_delta_set_idx_map( FT_FACE( face ),
&colr->delta_set_idx_map );
mm->done_item_var_store( FT_FACE( face ),
&colr->var_store );
}
#endif
error = FT_THROW( Invalid_Table );
NoColr:
@ -272,6 +360,18 @@
if ( colr )
{
#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT
if ( VARIABLE_COLRV1_ENABLED )
{
FT_Service_MultiMasters mm = (FT_Service_MultiMasters)face->mm;
mm->done_delta_set_idx_map( FT_FACE( face ),
&colr->delta_set_idx_map );
mm->done_item_var_store( FT_FACE( face ),
&colr->var_store );
}
#endif
FT_FRAME_RELEASE( colr->table );
FT_FREE( colr );
}