From: Paul Berry <stereotype441@gmail.com>
Date: Tue, 3 Dec 2013 23:41:14 +0000 (-0800)
Subject: i965: Don't try to use HW blitter for glCopyPixels() when multisampled.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f416a15096c0984dce689681a004554ecb2ea728;p=mesa.git

i965: Don't try to use HW blitter for glCopyPixels() when multisampled.

The hardware blitter doesn't understand multisampled layouts, so
there's no way this could possibly succeed.

Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---

diff --git a/src/mesa/drivers/dri/i965/intel_pixel_copy.c b/src/mesa/drivers/dri/i965/intel_pixel_copy.c
index d61940dda22..e76b24bf9da 100644
--- a/src/mesa/drivers/dri/i965/intel_pixel_copy.c
+++ b/src/mesa/drivers/dri/i965/intel_pixel_copy.c
@@ -102,6 +102,11 @@ do_blit_copypixels(struct gl_context * ctx,
       return false;
    }
 
+   if (draw_irb->mt->num_samples > 1 || read_irb->mt->num_samples > 1) {
+      perf_debug("glCopyPixels() fallback: multisampled buffers\n");
+      return false;
+   }
+
    if (ctx->_ImageTransferState) {
       perf_debug("glCopyPixels(): Unsupported image transfer state\n");
       return false;