mesa: allow BlendBarrier to be used without support for full fb fetch

The extension spec is not currently published, so it's a bit premature
to require it for BlendBarrier usage.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/mesa/main/barrier.c b/src/mesa/main/barrier.c
index 2f5b451..e55d13c 100644 (file)
--- a/src/mesa/main/barrier.c
+++ b/src/mesa/main/barrier.c
@@ -114,7 +114,8 @@ _mesa_BlendBarrier(void)
 {
    GET_CURRENT_CONTEXT(ctx);
 
-   if (!ctx->Extensions.MESA_shader_framebuffer_fetch_non_coherent) {
+   if (!ctx->Extensions.MESA_shader_framebuffer_fetch_non_coherent &&
+       !ctx->Extensions.KHR_blend_equation_advanced) {
       _mesa_error(ctx, GL_INVALID_OPERATION,
                   "glBlendBarrier(not supported)");
       return;