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util: add dual blend helper function (v2)

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This is just a function to tell if a certain blend mode requires dual sources.

v2: move to inlines as per Brian's suggestion

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-03-24 14:28:03 +00:00
parent a21df96507
commit c59d32d1ce
1 changed files with 26 additions and 0 deletions
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26
src/gallium/auxiliary/util/u_dual_blend.h Normal file
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#ifndef U_DUAL_BLEND_H
#define U_DUAL_BLEND_H
#include "pipe/p_state.h"
static INLINE boolean util_blend_factor_is_dual_src(int factor)
{
return (factor == PIPE_BLENDFACTOR_SRC1_COLOR) ||
(factor == PIPE_BLENDFACTOR_SRC1_ALPHA) ||
(factor == PIPE_BLENDFACTOR_INV_SRC1_COLOR) ||
(factor == PIPE_BLENDFACTOR_INV_SRC1_ALPHA);
}
static INLINE boolean util_blend_state_is_dual(const struct pipe_blend_state *blend,
int index)
{
if (util_blend_factor_is_dual_src(blend->rt[index].rgb_src_factor) ||
util_blend_factor_is_dual_src(blend->rt[index].alpha_src_factor) ||
util_blend_factor_is_dual_src(blend->rt[index].rgb_dst_factor) ||
util_blend_factor_is_dual_src(blend->rt[index].alpha_dst_factor))
return true;
return false;
}
#endif