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mesa: Add helper function _mesa_is_alpha_to_coverage_enabled()

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Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
This commit is contained in:
Anuj Phogat 2016-10-25 11:56:07 -07:00
parent 0295c792b4
commit a1bd2f6950
2 changed files with 16 additions and 0 deletions
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13
src/mesa/main/framebuffer.c
View file

@ -1016,3 +1016,16 @@ _mesa_is_alpha_test_enabled(const struct gl_context *ctx)
bool buffer0_is_integer = ctx->DrawBuffer->_IntegerBuffers & 0x1;
return (ctx->Color.AlphaEnabled && !buffer0_is_integer);
}
/**
* Is alpha to coverage enabled and applicable to the currently bound
* framebuffer?
*/
bool
_mesa_is_alpha_to_coverage_enabled(const struct gl_context *ctx)
{
bool buffer0_is_integer = ctx->DrawBuffer->_IntegerBuffers & 0x1;
return (ctx->Multisample.SampleAlphaToCoverage &&
_mesa_is_multisample_enabled(ctx) &&
!buffer0_is_integer);
}

3
src/mesa/main/framebuffer.h
View file

@ -152,4 +152,7 @@ _mesa_is_multisample_enabled(const struct gl_context *ctx);
extern bool
_mesa_is_alpha_test_enabled(const struct gl_context *ctx);
extern bool
_mesa_is_alpha_to_coverage_enabled(const struct gl_context *ctx);
#endif /* FRAMEBUFFER_H */