| commit | 9c579023f0750539bdf7815f8545c4620540387a | |
| author | Vincent Povirk <vincent@codeweavers.com> | |
| Tue, 24 Mar 2015 17:50:18 +0000 (24 12:50 -0500) | ||
| committer | Alexandre Julliard <julliard@winehq.org> | |
| Wed, 25 Mar 2015 10:46:38 +0000 (25 19:46 +0900) | ||
| tree | c046712e8228e5058ae284aa32c8425a5ac6ec8f | treesnapshot (tar.gz zip) |
| parent | e95dbb3b747dcd92b614578b3ca4b1c2dbfdaece | commitdiff |
gdiplus: Fix blend_colors when alpha channel differs.
When picking a color halfway between 100% white (0xffffffff) and fully
transparent (0x00000000), the result was 50% opaque 50% grey
(0x80808080) when it should really be 50% opaque white (0x80ffffff).
This had a tendency to create grey fringes on things. The fix is to
weight the non-alpha components based on how much they contribute to
the final alpha value.
When picking a color halfway between 100% white (0xffffffff) and fully
transparent (0x00000000), the result was 50% opaque 50% grey
(0x80808080) when it should really be 50% opaque white (0x80ffffff).
This had a tendency to create grey fringes on things. The fix is to
weight the non-alpha components based on how much they contribute to
the final alpha value.
| dlls/gdiplus/graphics.c | diffblobblamehistory |