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| author | Shao Yu Zhang <shaozhang@fb.com> | 2018-05-13 03:25:09 +0200 |
|---|---|---|
| committer | Werner Lemberg <wl@gnu.org> | 2018-05-13 03:25:09 +0200 |
| commit | f04d81751ac68b23c89da2edd31c43fd9fc5c75c (patch) | |
| tree | a2b8a22fb749ed5905f5643ef85c62b4b3d646cf /devel | |
| parent | 84eebf48021ab76c1c628bb7451b712f701e4518 (diff) | |
| download | freetype2-f04d81751ac68b23c89da2edd31c43fd9fc5c75c.tar.gz | |
[sfnt] Preliminary support of coloured layer outlines.
This commit enables OpenType's COLR/CPAL table handling; a typical
application are color emojis that can be scaled to any size.
If the color palette does not exist or is invalid, the rendering
step rasterizes the outline instead. The current implementation
assumes that the foreground is black.
Enable this by defining option TT_CONFIG_OPTION_COLOR_LAYERS.
There are still some issues with metrics; additionally, an API to
fetch color layers is missing.
* devel/ftoption.h, include/freetype/config/ftoption.h
(TT_CONFIG_OPTION_COLOR_LAYERS): New macro.
* include/freetype/internal/ftobjs.h (FT_Glyph_LayerRec,
FT_Colr_InternalRec): New structures.
(FT_Slot_InternalRec): Add `color_layers' field.
* include/freetype/internal/sfnt.h (TT_Load_Colr_Layer_Func,
TT_Blend_Colr_Func): New function types.
(SFNT_Interface): Add `load_colr', `free_colr', `load_colr_layer',
and `colr_blend' fields.
* include/freetype/internal/tttypes.h (TT_FaceRec): Add
`colr_and_cpal' field.
* include/freetype/internal/tttags. (TTAG_COLR, TTAG_CPAL): New
macros.
* src/sfnt/ttcolr.c, src/sfnt/ttcolr.h: New files.
* src/base/ftobjs.c (ft_glyphslot_done, FT_Render_Glyph_Internal):
Handle glyph color layers.
* src/sfnt/Jamfile (_sources), src/sfnt/rules.mk (SFNT_DRV_SRC): Add
`ttcolr.c'.
* src/sfnt/sfdriver.c: Include `ttcolr.h'.
(PUT_COLOR_LAYERS): New macro.
Update call to `FT_DEFINE_SFNT_INTERFACE'.
* src/sfnt/sfnt.c: Include `ttcolr.c'.
* src/sfnt/sfobjs.c (sfnt_load_face): Load `COLR' and `CPAL' tables.
(sfnt_done_face): Updated.
* src/truetype/ttgload.c (TT_Load_Glyph): Handle color layers.
Diffstat (limited to 'devel')
| -rw-r--r-- | devel/ftoption.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/devel/ftoption.h b/devel/ftoption.h index 84933a0c7..2bc2a76eb 100644 --- a/devel/ftoption.h +++ b/devel/ftoption.h @@ -487,6 +487,15 @@ FT_BEGIN_HEADER /*************************************************************************/ /* */ + /* Define TT_CONFIG_OPTION_COLOR_LAYERS if you want to support coloured */ + /* outlines (from the COLR/CPAL tables) in all formats using the SFNT */ + /* module (namely TrueType & OpenType). */ + /* */ +#define TT_CONFIG_OPTION_COLOR_LAYERS + + + /*************************************************************************/ + /* */ /* Define TT_CONFIG_OPTION_POSTSCRIPT_NAMES if you want to be able to */ /* load and enumerate the glyph Postscript names in a TrueType or */ /* OpenType file. */ |