[Mesa-dev] [PATCH 5/7] util: add dual blend helper function
Brian Paul
brianp at vmware.com
Wed Apr 4 08:15:34 PDT 2012
On 04/03/2012 07:16 AM, Dave Airlie wrote:
> From: Dave Airlie<airlied at redhat.com>
>
> This is just a function to tell if a certain blend mode requires dual sources.
>
> Signed-off-by: Dave Airlie<airlied at redhat.com>
> ---
> src/gallium/auxiliary/util/u_dual_blend.h | 23 +++++++++++++++++++++++
> 1 files changed, 23 insertions(+), 0 deletions(-)
> create mode 100644 src/gallium/auxiliary/util/u_dual_blend.h
>
> diff --git a/src/gallium/auxiliary/util/u_dual_blend.h b/src/gallium/auxiliary/util/u_dual_blend.h
> new file mode 100644
> index 0000000..5c2ddab
> --- /dev/null
> +++ b/src/gallium/auxiliary/util/u_dual_blend.h
> @@ -0,0 +1,23 @@
> +#ifndef U_DUAL_BLEND_H
> +#define U_DUAL_BLEND_H
> +
> +#include "pipe/p_state.h"
> +
> +#define util_is_dual_src_blend(x) (((x) == PIPE_BLENDFACTOR_SRC1_COLOR) || \
> + ((x) == PIPE_BLENDFACTOR_SRC1_ALPHA) || \
> + ((x) == PIPE_BLENDFACTOR_INV_SRC1_COLOR) || \
> + ((x) == PIPE_BLENDFACTOR_INV_SRC1_ALPHA))
Maybe make that macro into an inline function?
> +
> +static INLINE boolean util_blend_state_is_dual(const struct pipe_blend_state *blend,
> + int index)
> +{
> + if (util_is_dual_src_blend(blend->rt[index].rgb_src_factor) ||
> + util_is_dual_src_blend(blend->rt[index].alpha_src_factor) ||
> + util_is_dual_src_blend(blend->rt[index].rgb_dst_factor) ||
> + util_is_dual_src_blend(blend->rt[index].alpha_dst_factor))
> + return true;
> + return false;
> +}
> +
> +
> +#endif
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