This function facilitates access to full capabilities of FreeType
rendering engine for custom glyphs. This can be quite useful for
consistent rendering of mathematical and chemical formulas, e.g.
https://bugs.chromium.org/p/chromium/issues/detail?id=757078
* include/freetype/ftglyph.h, src/base/ftglyph.c (FT_New_Glyph): New
function.
Still missing: Support for negative bitmap pitch and subpixel offset
of source bitmap.
* include/freetype/ftbitmap.h, src/base/ftbitmap.c
(FT_Bitmap_Blend): New function.
This solution doesn't store any data in an `FT_GlyphSlot' object.
* include/freetype/freetype.h (FT_LayerIterator): New structure.
(FT_Get_Color_Glyph_Layer): New function.
* include/freetype/internal/sfnt.h (TT_Get_Colr_Layer_Func): New
function type.
(SFNT_Interface, FT_DEFINE_SFNT_INTERFACE): Add it.
* src/base/ftobjs.c (FT_Get_Color_Glyph_Layer): Implement it.
* src/sfnt/ttcolr.c (tt_face_get_colr_layer): New function.
* src/sfnt/ttcolr.h: Updated.
* src/sfnt/sfdriver.c (sfnt_interface): Updated.
This introduces `FT_Library_SetLcdGeometry' for setting up arbitrary
LCD subpixel geometry including non-striped patterns.
* src/base/ftlcdfil.c (FT_Library_SetLcdGeometry): New function.
* include/freetype/ftlcdfil.h: Document it.
* include/freetype/freetype.h: Minor.
* include/freetype/ftchapters.h: Minor.
This monster commit was created by applying Nikhil's scripts
`docconverter.py' and `markify.py' to all C header and source files,
followed up by minor manual clean-up.
No change in functionality, of course.
I used commit f7419907bc6044b9b7057f9789866426c804ba82 from
https://github.com/nikramakrishnan/freetype-docs.git.
* include/freetype/config/ftheader.h (FT_COLOR_H): New macro.
* include/freetype/internal/ftobjs.h (FT_Colr_Internal): Change
type of `load_flags' to `FT_Int32'.
* include/freetype/internal/sfnt.h (TT_Load_Colr_Layer_Func): Change
type of `idx' to `FT_UInt'.
(TT_Blend_Colr_Func): Change type of `color_index' to `FT_UInt'.
* src/base/ftobjs.c (FT_Render_Glyph_Internal): Change type of
`load_flags' to `FT_Int32'.
* src/sfnt/ttcolr.c (find_base_glyph_record,
tt_face_load_colr_layers): Change type of `glyph_id' to `FT_UInt'.
(tt_face_find_color, tt_face_colr_blend_layer): Change type of
`color_index' to `FT_UInt'.
Fix signedness and type issues.
* src/sfnt/ttcolr.h: Updated.
This generalizes magic outline shifts that make Harmony LCD
rendering work in terms of precise two-dimensional RGB subpixel
positions. These coordinates are now set in time of the `smooth'
module initialization and later used to shift a glyph outline for
rendering. FT_RENDER_MODE_LCD and FT_RENDER_MODE_LCD_V use the same
coordinates. The letter, however, rotates them before using.
The LCD bitmap padding is also calculated using these coordinates.
* include/freetype/internal/ftobjs.h (FT_LibraryRec): New array field
`lcd_geometry'.
* src/base/ftlcdfil.c (ft_lcd_padding): Reworked.
* src/base/ftobjs.c (ft_glyphslot_preset_bitmap): Updated accordingly.
* src/smooth/ftsmooth.c [!FT_CONFIG_OPTION_SUBPIXEL_RENDERING]
(ft_smooth_init): Initialize `lcd_geometry'.
(ft_smooth_render_generic): Formalize outline shifts.
* include/freetype/internal/ftobjs.h (FT_Glyph_LayerRec): Move this
structure to...
* include/freetype/freetype.h (FT_Glyph_LayerRec): ... this
header file.
(FT_Glyph_Layer): New typedef.
Update code to use it where appropriate.
* src/base/ftobjs.c (FT_Get_GlyphLayers): New function.
It is rather fundamental to set monochrome bitmap based on rounded
CBox because the b/w rasterizer turns on pixels when their centers are
inside the glyph outline. The dropout control is unpredictable and can
distort narrow glyphs if the bitmap is too wide.
Reported by Chris Liddell.
* src/base/ftobjs.c (ft_glyphslot_preset_bitmap): If BBox boundaries
are too close, adjust them before rounding.
* src/sfnt/ttcolr.c (tt_face_load_colr_layers): Return FT_Err_Ok if
current glyph is not a `COLR' base glyph.
* src/truetype/ttgload.c (TT_Load_Glyph): Don't allocate
`color_layers' if there are no color layers.
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.
*/* [FT_CONFIG_OPTION_PIC]: Remove all code guarded by this
preprocessor symbol.
*/*: Replace `XXX_GET' macros (which could be either a function in
PIC mode or an array in non-PIC mode) with `xxx' arrays.
* include/freetype/internal/ftpic.h, src/autofit/afpic.c,
src/autofit/afpic.h, src/base/basepic.c, src/base/basepic.h,
src/base/ftpic.c, src/cff/cffpic.c, src/cff/cffpic.h,
src/pshinter/pshpic.c, src/pshinter/pshpic.h, src/psnames/pspic.c,
src/psnames/pspic.h, src/raster/rastpic.c, src/raster/rastpic.h,
src/sfnt/sfntpic.c, src/sfnt/sfntpic.h, src/smooth/ftspic.c,
src/smooth/ftspic.h, src/truetype/ttpic.c, src/truetype/ttpic.h:
Removed.
Bug introduced after release 2.8.
* src/base/ftbitmap.c (ft_bitmap_assure_buffer): We use
`FT_QALLOC_MULT', which doesn't zero out the buffer. Adjust the
bitmap copying code to take care of this fact.
* builds/unix/configure.raw: Check for resource compiler.
* builds/unix/unix-cc.in: Conditionally set up resource compiler.
* builds/freetype.mk: Add conditional rule for `ftver.rc'.
* src/base/ftver.rc: Copyright notice and year update.
This is necessary in case the application's memory routines differ
from FreeType. A typical example is a Python application on Windows
that calls FreeType compiled as a DLL via the `ctypes' interface.
* include/freetype/ftmm.h, src/base/ftmm.c (FT_Done_MM_Var): Declare
and define.
* docs/CHANGES: Updated.
* include/freetype/internal/ftpsprop.h: Use `FT_BASE_CALLBACK'.
(ps_property_get): Harmonize declaration with corresponding
function typedef.
* include/freety[e/internal/fttrace.h: Add `trace_psprops'.
* src/base/ftpsprop.c: Include necessary header files.
(FT_COMPONENT): Define.
(ps_property_set): Tag with `FT_BASE_CALLBACK_DEF'.
(ps_property_get): Tag with `FT_BASE_CALLBACK_DEF'.
Harmonize declaration with corresponding function typedef.
This reduces the amount of duplicated code across PostScript drivers.
* src/cff/cffdrivr.c, src/cid/cidriver.c, src/type1/t1driver.c
({cff,cid,t1}_property_{get,set}): Moved to...
* include/freetype/internal/ftpsprop.h: ...this new file.
(ps_property_{get,set}): New functions to replace moved ones.
* src/base/ftpsprop.c: Implement above functions.
* include/freetype/internal/internal.h (FT_INTERNAL_POSTSCRIPT_PROPS_H):
New macro.
* src/cff/cffdrivr.c, src/cid/cidriver.c, src/type1/t1driver.c: Updated.
* src/base/Jamfile, src/base/rules.mk, src/base/ftbase.c: Updated.
We exit early if the current design or blend coordinates are
identical to the new ones.
* src/truetype/ttgxvar.c (tt_set_mm_blend, TT_Set_Var_Design):
Implement it, returning internal error code -1 if there will be no
variation change.
* src/type1/t1load.c (t1_set_mm_blend): Ditto.
* src/base/ftmm.c (FT_Set_Var_Design_Coordinates,
FT_Set_MM_Blend_Coordinates, FT_Set_Var_Blend_Coordinates): Updated.
This reduces redundancy and increases synergy; it also reduces the
number of header files.
* include/freetype/config/ftheader.h (FT_DRIVER_H): New macro.
(FT_AUTOHINTER_H, FT_CFF_DRIVER_H, FT_TRUETYPE_DRIVER_H,
FT_PCF_DRIVER_H, FT_TYPE1_DRIVER_H): Make them aliases to
FT_DRIVER_H.
* include/freetype/ftautoh.h, include/freetype/ftcffdrv.h,
include/freetype/ftpcfdrv.h, include/freetype/ftt1drv.h,
include/freetype/ftttdrv.h: Replaced with...
* include/freetype/ftdriver.h: ...this new file.
(FT_CFF_HINTING_ADOBE, FT_T1_HINTING_ADOBE): Renamed to...
(FT_HINTING_ADOBE): ... this new macro.
(FT_CFF_HINTING_FREETYPE, FT_T1_HINTING_FREETYPE): Renamed to...
(FT_HINTING_FREETYPE): ... this new macro.
* src/*/*: Updated accordingly.
Also reported as
https://bugs.chromium.org/p/chromium/issues/detail?id=791317
* src/base/ftbitmap.c (ft_bitmap_assure_buffer): If increasing the
bitmap size needs a larger bitmap buffer, assure that the new memory
areas are initialized also.
Some static function declarations cause unused function warnings if
certain config options are turned off via `ftoption.h'.
* src/base/ftbase.h, src/base/ftrfork.c, src/sfnt/ttbdf.h,
src/truetype/ttgxvar.h: Add #ifdef guards around these sections.
