[Git][freetype/freetype][master] [sfnt] 'COLR' v1 PaintSweepGradient spec update

[Werner Lemberg (@wl)]

Werner Lemberg pushed to branch master at FreeType / FreeType

Commits:

• 30a82e1e
  by Dominik Röttsches at 2021-07-29T06:12:51+00:00

  [sfnt] 'COLR' v1 PaintSweepGradient spec update
  
  * src/sfnt/ttcolr.c (read_paint): PaintSweepGradient follows other
  spec changes and now has the angles specified as F2DOT14, reflect
  that in the implementation.
  * include/freetype/ftcolor.h (FT_PaintSweepGradient): Update
  documentation.
  

2 changed files:

• include/freetype/ftcolor.h
• src/sfnt/ttcolr.c

Changes:

include/freetype/ftcolor.h

---

...	...	@@ -965,14 +965,16 @@ FT_BEGIN_HEADER
965	965	* The center of the sweep gradient (in font units).
966	966	*
967	967	* start_angle ::
968		- * The start angle of the sweep gradient, in 16.16 fixed point format
969		- * specifying degrees. Values are given counter-clockwise, starting
970		- * from the (positive) y~axis.
	968	+ * The start angle of the sweep gradient, in 16.16 fixed point
	969	+ * format specifying degrees divided by 180.0 (as in the
	970	+ * spec). Multiply by 180.0f to receive degrees value. Values are
	971	+ * given counter-clockwise, starting from the (positive) y~axis.
971	972	*
972	973	* end_angle ::
973		- * The end angle of the sweep gradient, in 16.16 fixed point format
974		- * specifying degrees. Values are given counter-clockwise, starting
975		- * from the (positive) y~axis.
	974	+ * The end angle of the sweep gradient, in 16.16 fixed point
	975	+ * format specifying degrees divided by 180.0 (as in the
	976	+ * spec). Multiply by 180.0f to receive degrees value. Values are
	977	+ * given counter-clockwise, starting from the (positive) y~axis.
976	978	*
977	979	* @since:
978	980	* 2.11 -- **currently experimental only!** There might be changes

src/sfnt/ttcolr.c

---

...	...	@@ -531,8 +531,8 @@
531	531	apaint->u.sweep_gradient.center.x = FT_NEXT_SHORT( p );
532	532	apaint->u.sweep_gradient.center.y = FT_NEXT_SHORT( p );
533	533
534		- apaint->u.sweep_gradient.start_angle = FT_NEXT_LONG( p );
535		- apaint->u.sweep_gradient.end_angle = FT_NEXT_LONG( p );
	534	+ apaint->u.sweep_gradient.start_angle = FT_NEXT_SHORT( p ) << 2;
	535	+ apaint->u.sweep_gradient.end_angle = FT_NEXT_SHORT( p ) << 2;
536	536
537	537	return 1;
538	538	}

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