From 67034b9efce43a7b83f79e44beb6d4e8f6dff22a Mon Sep 17 00:00:00 2001 From: José Fonseca Date: Thu, 5 Nov 2009 17:05:20 +0000 Subject: softpipe: Implement PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE for destination. It is a valid and tested combination on D3D9. --- src/gallium/drivers/softpipe/sp_quad_blend.c | 12 ++++++++++-- 1 file 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 */ -- cgit v1.2.3