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Finish CPAL/COLR support (2/4).

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* src/sfnt/ttcolr.c (tt_face_palette_set): New function.
(tt_face_load_colr): Allocate `face->palette' and call
`tt_face_palette_set'.
Adjust return error code in case of error.

* src/sfnt/ttcolr.h: Updated.

* include/freetype/internal/sfnt.h (TT_Set_Palette_Func): New
function type.
(SFNT_Interface, FT_DEFINE_SFNT_INTERFACE): Add it.

* src/sfnt/sfdriver.c (sfnt_interface), src/sfnt/sfobjs.c
(sfnt_done_face): Updated.
This commit is contained in:
Werner Lemberg 2018-06-12 05:53:58 +02:00
parent 7542f030ec
commit b85d4e8f04
6 changed files with 100 additions and 2 deletions
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18
ChangeLog
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@ -1,3 +1,21 @@
2018-06-12 Werner Lemberg <wl@gnu.org>
Finish CPAL/COLR support (2/4).
* src/sfnt/ttcolr.c (tt_face_palette_set): New function.
(tt_face_load_colr): Allocate `face->palette' and call
`tt_face_palette_set'.
Adjust return error code in case of error.
* src/sfnt/ttcolr.h: Updated.
* include/freetype/internal/sfnt.h (TT_Set_Palette_Func): New
function type.
(SFNT_Interface, FT_DEFINE_SFNT_INTERFACE): Add it.
* src/sfnt/sfdriver.c (sfnt_interface), src/sfnt/sfobjs.c
(sfnt_done_face): Updated.
2018-06-12 Werner Lemberg <wl@gnu.org>
Finish CPAL/COLR support (1/4).

26
include/freetype/internal/sfnt.h
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@ -469,6 +469,29 @@ FT_BEGIN_HEADER
FT_UShort* aadvance );
/**************************************************************************
*
* @FuncType:
* TT_Set_Palette_Func
*
* @Description:
* Load the colors into `face->palette' for a given palette index.
*
* @Input:
* face ::
* The target face object.
*
* idx ::
* The palette index.
*
* @Return:
* FreeType error code. 0 means success.
*/
typedef FT_Error
(*TT_Set_Palette_Func)( TT_Face face,
FT_UInt idx );
/**************************************************************************
*
* @FuncType:
@ -739,6 +762,7 @@ FT_BEGIN_HEADER
TT_Load_Table_Func load_colr;
TT_Free_Table_Func free_colr;
TT_Set_Palette_Func set_palette;
TT_Load_Colr_Layer_Func load_colr_layer;
TT_Blend_Colr_Func colr_blend;
@ -786,6 +810,7 @@ FT_BEGIN_HEADER
load_strike_metrics_, \
load_colr_, \
free_colr_, \
set_palette_, \
load_colr_layer_, \
colr_blend_, \
get_metrics_, \
@ -823,6 +848,7 @@ FT_BEGIN_HEADER
load_strike_metrics_, \
load_colr_, \
free_colr_, \
set_palette_, \
load_colr_layer_, \
colr_blend_, \
get_metrics_, \

2
src/sfnt/sfdriver.c
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@ -1261,6 +1261,8 @@
/* TT_Load_Table_Func load_colr */
PUT_COLOR_LAYERS( tt_face_free_colr ),
/* TT_Free_Table_Func free_colr */
PUT_COLOR_LAYERS( tt_face_palette_set ),
/* TT_Set_Palette_Func set_palette */
PUT_COLOR_LAYERS( tt_face_load_colr_layers ),
/* TT_Load_Colr_Layer_Func load_colr_layer */
PUT_COLOR_LAYERS( tt_face_colr_blend_layer ),

1
src/sfnt/sfobjs.c
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@ -1812,6 +1812,7 @@
FT_FREE( face->palette_data.palette_name_ids );
FT_FREE( face->palette_data.palette_types );
FT_FREE( face->palette_data.palette_entry_name_ids );
FT_FREE( face->palette );
face->sfnt = NULL;
}

51
src/sfnt/ttcolr.c
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@ -289,16 +289,26 @@
face->colr_and_cpal = cc;
/* set up default palette */
if ( FT_NEW_ARRAY( face->palette,
face->palette_data.num_palette_entries ) )
goto NoColor;
tt_face_palette_set( face, 0 );
return FT_Err_Ok;
InvalidTable:
error = FT_THROW( Invalid_File_Format );
error = FT_THROW( Invalid_Table );
NoColor:
FT_FRAME_RELEASE( colr_table );
FT_FRAME_RELEASE( cpal_table );
/* arrays in `face->palette_data' are freed in `sfnt_face_done' */
FT_FREE( cc );
/* arrays in `face->palette_data' and `face->palette' */
/* are freed in `sfnt_done_face' */
return error;
}
@ -462,6 +472,43 @@
}
FT_LOCAL_DEF( FT_Error )
tt_face_palette_set( TT_Face face,
FT_UInt palette_index )
{
ColrCpal* colr_and_cpal = (ColrCpal *)face->colr_and_cpal;
Cpal* cpal = &colr_and_cpal->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 * sizeof ( FT_Color );
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,

4
src/sfnt/ttcolr.h
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@ -42,6 +42,10 @@ 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,