[Mesa-dev] [PATCH v3 6/8] mesa: Enable usage of blend_func_extended blend factors

[Ian Romanick]

On 11/05/2015 06:47 PM, Ryan Houdek wrote:
> ---
>  src/mesa/main/blend.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/mesa/main/blend.c b/src/mesa/main/blend.c
> index 20aa498..185e30e 100644
> --- a/src/mesa/main/blend.c
> +++ b/src/mesa/main/blend.c
> @@ -67,7 +67,7 @@ legal_src_factor(const struct gl_context *ctx, GLenum factor)
>     case GL_SRC1_ALPHA:
>     case GL_ONE_MINUS_SRC1_COLOR:
>     case GL_ONE_MINUS_SRC1_ALPHA:
> -      return _mesa_is_desktop_gl(ctx)
> +      return ctx->API != API_OPENGLES
>           && ctx->Extensions.ARB_blend_func_extended;
>     default:
>        return GL_FALSE;
> @@ -107,7 +107,7 @@ legal_dst_factor(const struct gl_context *ctx, GLenum factor)
>     case GL_SRC1_ALPHA:
>     case GL_ONE_MINUS_SRC1_COLOR:
>     case GL_ONE_MINUS_SRC1_ALPHA:
> -      return _mesa_is_desktop_gl(ctx)
> +      return ctx->API != API_OPENGLES
>           && ctx->Extensions.ARB_blend_func_extended;
>     default:
>        return GL_FALSE;
> 

This extension also enables GL_SRC_ALPHA_SATURATE as a destination
weight.  Previously this was only available in OpenGL ES 3.0+ or desktop
OpenGL.