Merge branch 'mesa_7_7_branch'

[mesa.git] / src / mesa / drivers / dri / intel / intel_screen.c

diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index e240957197d5fb596d9a5ec32bc3768b363d0931..fe504166427bae4b06ae415a375213a9f007d4d1 100644 (file)
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -37,11 +37,9 @@
 #include "intel_buffers.h"
 #include "intel_bufmgr.h"
 #include "intel_chipset.h"
-#include "intel_extensions.h"
 #include "intel_fbo.h"
 #include "intel_regions.h"
 #include "intel_screen.h"
-#include "intel_span.h"
 #include "intel_tex.h"
 
 #include "i915_drm.h"
@@ -128,8 +126,29 @@ intelDRI2Flush(__DRIdrawable *drawable)
 static void
 intelDRI2FlushInvalidate(__DRIdrawable *drawable)
 {
+   struct intel_context *intel = drawable->driContextPriv->driverPrivate;
+
    intelDRI2Flush(drawable);
    drawable->validBuffers = GL_FALSE;
+
+   /* We're using FlushInvalidate as an indicator that a frame is
+    * done.  It's only called immediately after SwapBuffers, so it
+    * won't affect front-buffer rendering or applications explicitly
+    * managing swap regions using MESA_copy_buffer.
+    *
+    * Wait for the swapbuffers before the one we just emitted, so we don't
+    * get too many swaps outstanding for apps that are GPU-heavy but not
+    * CPU-heavy.
+    *
+    * Unfortunately, we don't have a handle to the batch containing the swap,
+    * and getting our hands on that doesn't seem worth it, so we just use the
+    * first batch we emitted after the last swap.
+    */
+   if (intel->first_post_swapbuffers_batch != NULL) {
+      drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
+      drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
+      intel->first_post_swapbuffers_batch = NULL;
+   }
 }
 
 static const struct __DRI2flushExtensionRec intelFlushExtension = {