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comparison: gfx/cairo/premultiply-alpha-solid-gradients.patch
gfx/cairo/premultiply-alpha-solid-gradients.patch
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:f9ffb7ba0022 |
|---|---|
| 1 Fix single and multi-stop solid gradients by multiplying by the alpha component. r=roc | |
| 2 | |
| 3 This cairo commit that caused the problem: 2d790daa957471670f4ae0d3b22da89e4ee7111f. | |
| 4 It was merged into mozilla-central with 1effb72d30cf | |
| 5 | |
| 6 diff --git a/gfx/cairo/cairo/src/cairo-pattern.c b/gfx/cairo/cairo/src/cairo-pattern.c | |
| 7 --- a/gfx/cairo/cairo/src/cairo-pattern.c | |
| 8 +++ b/gfx/cairo/cairo/src/cairo-pattern.c | |
| 9 @@ -2262,8 +2262,17 @@ _cairo_pattern_acquire_surface (const ca | |
| 10 | |
| 11 if (src->n_stops) | |
| 12 { | |
| 13 + cairo_color_t color; | |
| 14 + | |
| 15 + /* multiply by alpha */ | |
| 16 + _cairo_color_init_rgba (&color, | |
| 17 + src->stops->color.red, | |
| 18 + src->stops->color.green, | |
| 19 + src->stops->color.blue, | |
| 20 + src->stops->color.alpha); | |
| 21 + | |
| 22 _cairo_pattern_init_solid (&solid, | |
| 23 - &src->stops->color, | |
| 24 + &color, | |
| 25 CAIRO_CONTENT_COLOR_ALPHA); | |
| 26 } | |
| 27 else | |
| 28 @@ -2295,9 +2304,17 @@ _cairo_pattern_acquire_surface (const ca | |
| 29 } | |
| 30 if (i == src->n_stops) { | |
| 31 cairo_solid_pattern_t solid; | |
| 32 + cairo_color_t color; | |
| 33 + | |
| 34 + /* multiply by alpha */ | |
| 35 + _cairo_color_init_rgba (&color, | |
| 36 + src->stops->color.red, | |
| 37 + src->stops->color.green, | |
| 38 + src->stops->color.blue, | |
| 39 + src->stops->color.alpha); | |
| 40 | |
| 41 _cairo_pattern_init_solid (&solid, | |
| 42 - &src->stops->color, | |
| 43 + &color, | |
| 44 CAIRO_CONTENT_COLOR_ALPHA); | |
| 45 | |
| 46 status = |
