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-rw-r--r--src/gallium/state_trackers/dri/dri_drawable.c12
-rw-r--r--src/gallium/state_trackers/dri/dri_drawable.h5
2 files changed, 17 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index 15a2088df5..865cc8d0b6 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -138,6 +138,18 @@ dri_get_buffers(__DRIdrawablePrivate * dPriv)
dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
+ if (drawable->old_num == count &&
+ drawable->old_w == dri_drawable->w &&
+ drawable->old_h == dri_drawable->h &&
+ memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
+ return;
+ } else {
+ drawable->old_num = count;
+ drawable->old_w = dri_drawable->w;
+ drawable->old_h = dri_drawable->h;
+ memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
+ }
+
for (i = 0; i < count; i++) {
enum pipe_format format = 0;
int index = 0;
diff --git a/src/gallium/state_trackers/dri/dri_drawable.h b/src/gallium/state_trackers/dri/dri_drawable.h
index 78a66624aa..0f654d804a 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.h
+++ b/src/gallium/state_trackers/dri/dri_drawable.h
@@ -46,6 +46,11 @@ struct dri_drawable
unsigned attachments[8];
unsigned num_attachments;
+ __DRIbuffer old[8];
+ unsigned old_num;
+ unsigned old_w;
+ unsigned old_h;
+
/* gallium */
struct st_framebuffer *stfb;
struct pipe_fence_handle *swap_fences[DRI_SWAP_FENCES_MAX];