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Abstract CAIRO_ALPHA_IS_OPAQUE out for general internal use.

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Optimize to defer to cairo_paint if the alpha value is actually opaque.
This commit is contained in:
Carl Worth 2005-06-20 11:09:51 +00:00
parent f15ec64e7f
commit ab668278b0
4 changed files with 17 additions and 1 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2005-06-20 Carl Worth <cworth@cworth.org>
* src/cairoint.h:
* src/cairo-pattern.c: (_cairo_pattern_is_opaque_solid): Abstract
CAIRO_ALPHA_IS_OPAQUE out for general internal use.
* src/cairo.c: (cairo_paint_with_alpha): Optimize to defer to
cairo_paint if the alpha value is actually opaque.
2005-06-20 Carl Worth <cworth@cworth.org>
* src/cairo.h:

2
src/cairo-pattern.c
View file

@ -1115,7 +1115,7 @@ _cairo_pattern_is_opaque_solid (cairo_pattern_t *pattern)
solid = (cairo_solid_pattern_t *) pattern;
return (solid->color.alpha >= ((double)0xff00 / (double)0xffff));
return CAIRO_ALPHA_IS_OPAQUE (solid->color.alpha);
}
static cairo_int_status_t

5
src/cairo.c
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@ -1249,6 +1249,11 @@ cairo_paint_with_alpha (cairo_t *cr,
return;
}
if (CAIRO_ALPHA_IS_OPAQUE (alpha)) {
cairo_paint (cr);
return;
}
_cairo_color_init_rgba (&color, 1., 1., 1., alpha);
_cairo_pattern_init_solid (&pattern.solid, &color);

2
src/cairoint.h
View file

@ -147,6 +147,8 @@ typedef cairo_fixed_16_16_t cairo_fixed_t;
#define CAIRO_MAXSHORT SHRT_MAX
#define CAIRO_MINSHORT SHRT_MIN
#define CAIRO_ALPHA_IS_OPAQUE(alpha) ((alpha) >= ((double)0xff00 / (double)0xffff))
typedef struct _cairo_point {
cairo_fixed_t x;
cairo_fixed_t y;