From: Kenneth Graunke <kenneth@whitecape.org>
Date: Mon, 4 Aug 2014 06:54:22 +0000 (-0700)
Subject: i965: Emit a performance warning on conditional rendering.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ae95b9dd9be56ad84a8a4ab5955f580c337259cb;p=mesa.git

i965: Emit a performance warning on conditional rendering.

We have a CPU-side implementation of conditional rendering; it really
should be done on the GPU.  It's not necessarily that hard, but nobody
has gotten to fixing it yet.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
---

diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 4dae7d35b1c..412c3600320 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -539,6 +539,11 @@ void brw_draw_prims( struct gl_context *ctx,
 
    assert(unused_tfb_object == NULL);
 
+   if (ctx->Query.CondRenderQuery) {
+      perf_debug("Conditional rendering is implemented in software and may "
+                 "stall.  This should be fixed in the driver.\n");
+   }
+
    if (!_mesa_check_conditional_render(ctx))
       return;