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radeonsi: bypass alpha-test for integer colorbuffers

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Fixes spec/EXT_texture_integer/fbo-blending.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
This commit is contained in:
Marek Olšák 2013-09-23 21:41:34 +02:00
parent f7d004b9ad
commit f9ea435ebc
1 changed files with 10 additions and 1 deletions
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11
src/gallium/drivers/radeonsi/si_state.c
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@ -2352,7 +2352,16 @@ static INLINE void si_shader_selector_key(struct pipe_context *ctx,
}
if (rctx->queued.named.dsa) {
key->ps.alpha_func = rctx->queued.named.dsa->alpha_func;
key->ps.alpha_ref = rctx->queued.named.dsa->alpha_ref;
/* Alpha-test should be disabled if colorbuffer 0 is integer. */
if (rctx->framebuffer.nr_cbufs &&
rctx->framebuffer.cbufs[0] &&
util_format_is_pure_integer(rctx->framebuffer.cbufs[0]->texture->format))
key->ps.alpha_func = PIPE_FUNC_ALWAYS;
if (key->ps.alpha_func != PIPE_FUNC_ALWAYS &&
key->ps.alpha_func != PIPE_FUNC_NEVER)
key->ps.alpha_ref = rctx->queued.named.dsa->alpha_ref;
} else {
key->ps.alpha_func = PIPE_FUNC_ALWAYS;
}