gfx/cairo/premultiply-alpha-solid-gradients.patch@6474c204b198 (annotated)
gfx/cairo/premultiply-alpha-solid-gradients.patch
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | Fix single and multi-stop solid gradients by multiplying by the alpha component. r=roc |
| michael@0 | 2 | |
| michael@0 | 3 | This cairo commit that caused the problem: 2d790daa957471670f4ae0d3b22da89e4ee7111f. |
| michael@0 | 4 | It was merged into mozilla-central with 1effb72d30cf |
| michael@0 | 5 | |
| michael@0 | 6 | diff --git a/gfx/cairo/cairo/src/cairo-pattern.c b/gfx/cairo/cairo/src/cairo-pattern.c |
| michael@0 | 7 | --- a/gfx/cairo/cairo/src/cairo-pattern.c |
| michael@0 | 8 | +++ b/gfx/cairo/cairo/src/cairo-pattern.c |
| michael@0 | 9 | @@ -2262,8 +2262,17 @@ _cairo_pattern_acquire_surface (const ca |
| michael@0 | 10 | |
| michael@0 | 11 | if (src->n_stops) |
| michael@0 | 12 | { |
| michael@0 | 13 | + cairo_color_t color; |
| michael@0 | 14 | + |
| michael@0 | 15 | + /* multiply by alpha */ |
| michael@0 | 16 | + _cairo_color_init_rgba (&color, |
| michael@0 | 17 | + src->stops->color.red, |
| michael@0 | 18 | + src->stops->color.green, |
| michael@0 | 19 | + src->stops->color.blue, |
| michael@0 | 20 | + src->stops->color.alpha); |
| michael@0 | 21 | + |
| michael@0 | 22 | _cairo_pattern_init_solid (&solid, |
| michael@0 | 23 | - &src->stops->color, |
| michael@0 | 24 | + &color, |
| michael@0 | 25 | CAIRO_CONTENT_COLOR_ALPHA); |
| michael@0 | 26 | } |
| michael@0 | 27 | else |
| michael@0 | 28 | @@ -2295,9 +2304,17 @@ _cairo_pattern_acquire_surface (const ca |
| michael@0 | 29 | } |
| michael@0 | 30 | if (i == src->n_stops) { |
| michael@0 | 31 | cairo_solid_pattern_t solid; |
| michael@0 | 32 | + cairo_color_t color; |
| michael@0 | 33 | + |
| michael@0 | 34 | + /* multiply by alpha */ |
| michael@0 | 35 | + _cairo_color_init_rgba (&color, |
| michael@0 | 36 | + src->stops->color.red, |
| michael@0 | 37 | + src->stops->color.green, |
| michael@0 | 38 | + src->stops->color.blue, |
| michael@0 | 39 | + src->stops->color.alpha); |
| michael@0 | 40 | |
| michael@0 | 41 | _cairo_pattern_init_solid (&solid, |
| michael@0 | 42 | - &src->stops->color, |
| michael@0 | 43 | + &color, |
| michael@0 | 44 | CAIRO_CONTENT_COLOR_ALPHA); |
| michael@0 | 45 | |
| michael@0 | 46 | status = |
