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| author | José Fonseca <jfonseca@vmware.com> | 2009-11-05 17:05:20 +0000 |
|---|---|---|
| committer | José Fonseca <jfonseca@vmware.com> | 2009-11-05 19:44:07 +0000 |
| commit | 67034b9efce43a7b83f79e44beb6d4e8f6dff22a (patch) | |
| tree | 15f67fdf2cd002befc7224baf5be22e3ee5ed324 /src/gallium/drivers/softpipe/sp_quad_blend.c | |
| parent | e0590159ce68e0fc9bac21bcfddc9193f4ccdac5 (diff) | |
softpipe: Implement PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE for destination.
It is a valid and tested combination on D3D9.
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_quad_blend.c')
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_quad_blend.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/gallium/drivers/softpipe/sp_quad_blend.c b/src/gallium/drivers/softpipe/sp_quad_blend.c index 0ad0b98654..fe6b6cec35 100644 --- a/src/gallium/drivers/softpipe/sp_quad_blend.c +++ b/src/gallium/drivers/softpipe/sp_quad_blend.c @@ -478,7 +478,15 @@ blend_quad(struct quad_stage *qs, VEC4_MUL(dest[2], dest[2], dest[2]); /* B */ break; case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: - assert(0); /* illegal */ + { + const float *alpha = quadColor[3]; + float diff[4], temp[4]; + VEC4_SUB(diff, one, dest[3]); + VEC4_MIN(temp, alpha, diff); + VEC4_MUL(dest[0], quadColor[0], temp); /* R */ + VEC4_MUL(dest[1], quadColor[1], temp); /* G */ + VEC4_MUL(dest[2], quadColor[2], temp); /* B */ + } break; case PIPE_BLENDFACTOR_CONST_COLOR: { @@ -600,7 +608,7 @@ blend_quad(struct quad_stage *qs, VEC4_MUL(dest[3], dest[3], dest[3]); /* A */ break; case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE: - assert(0); /* illegal */ + /* dest = dest * 1 NO-OP, leave dest as-is */ break; case PIPE_BLENDFACTOR_CONST_COLOR: /* fall-through */ |