+ /* When moving from flip to copy, we assume that we can allocate in
+ * a more optimal way if we don't need to cater for the display
+ * controller.
+ */
+ if (ce->mode == XCB_PRESENT_COMPLETE_MODE_COPY &&
+ draw->last_present_mode == XCB_PRESENT_COMPLETE_MODE_FLIP) {
+ for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
+ if (draw->buffers[b])
+ draw->buffers[b]->reallocate = true;
+ }
+ }
+
+ /* If the server tells us that our allocation is suboptimal, we
+ * reallocate once.
+ */
+ if (ce->mode == XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY &&
+ draw->last_present_mode != ce->mode) {
+ for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
+ if (draw->buffers[b])
+ draw->buffers[b]->reallocate = true;
+ }
+ }
+