r600g: early exit in r600_clear if there's nothing to do

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/src/gallium/drivers/r600/r600_blit.c b/src/gallium/drivers/r600/r600_blit.c
index 8e553a8e3b99938bd2f6a5d13d9b6420c28b0962..1c59230c78eda3364fe9685f1a582ca6e5e8975d 100644 (file)
--- a/src/gallium/drivers/r600/r600_blit.c
+++ b/src/gallium/drivers/r600/r600_blit.c
@@ -401,6 +401,8 @@ static void r600_clear(struct pipe_context *ctx, unsigned buffers,
            rctx->framebuffer.nr_samples > 1) {
                evergreen_do_fast_color_clear(&rctx->b, fb, &rctx->framebuffer.atom,
                                              &buffers, color);
+               if (!buffers)
+                       return; /* all buffers have been fast cleared */
        }
 
        if (buffers & PIPE_CLEAR_COLOR) {