diff options
| author | Ilia Mirkin <[email protected]> | 2014-12-02 21:32:01 -0500 |
|---|---|---|
| committer | Ilia Mirkin <[email protected]> | 2014-12-06 18:18:20 -0500 |
| commit | 97fef2db5c2c6ec0b22bf5b7d968a4dc4b218363 (patch) | |
| tree | c3497376757a667870654f8435d6997bfb93a962 /src/gallium/auxiliary | |
| parent | 6b0196934509ac76293581f7ca69a3399ffb2e0a (diff) | |
freedreno/a3xx: fix alpha-blending on RGBX formats
Expert debugging assistance provided by Chris Forbes.
Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Rob Clark <[email protected]>
Diffstat (limited to 'src/gallium/auxiliary')
| -rw-r--r-- | src/gallium/auxiliary/Makefile.sources | 1 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_blend.h | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources index 862626461b1..ab794e16441 100644 --- a/src/gallium/auxiliary/Makefile.sources +++ b/src/gallium/auxiliary/Makefile.sources @@ -168,6 +168,7 @@ C_SOURCES := \ util/u_atomic.h \ util/u_bitmask.c \ util/u_bitmask.h \ + util/u_blend.h \ util/u_blit.c \ util/u_blit.h \ util/u_blitter.c \ diff --git a/src/gallium/auxiliary/util/u_blend.h b/src/gallium/auxiliary/util/u_blend.h new file mode 100644 index 00000000000..2485c34d418 --- /dev/null +++ b/src/gallium/auxiliary/util/u_blend.h @@ -0,0 +1,25 @@ +#ifndef U_BLEND_H +#define U_BLEND_H + +#include "pipe/p_state.h" + +/** + * When faking RGBX render target formats with RGBA ones, the blender is still + * supposed to treat the destination's alpha channel as 1 instead of the + * garbage that's there. Return a blend factor that will take that into + * account. + */ +static INLINE int +util_blend_dst_alpha_to_one(int factor) +{ + switch (factor) { + case PIPE_BLENDFACTOR_DST_ALPHA: + return PIPE_BLENDFACTOR_ONE; + case PIPE_BLENDFACTOR_INV_DST_ALPHA: + return PIPE_BLENDFACTOR_ZERO; + default: + return factor; + } +} + +#endif /* U_BLEND_H */ |