hwc: Full MDP Composition mode with overlap region removal
MDP bandwidth limitations can be avoided, if the overlapping region
covered by the smallest layer at a higher z-order, can be composed
on a render buffer using Copybit, and then it can be queued to MDP
along with other layers. It helps to improve performace by avoiding
GPU Composition in use cases like Home Screen pan. To enable this
feature, set system prop "persist.hwc.ptor.enable" to "true" or '1'
and enable Copybit HAL compilation.
Change-Id: Ib719d3dd42477837519518cc427f1b95356c28f7
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index d7fa73d..c7b7ded 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -376,6 +376,9 @@
// due to idle fallback or MDP composition.
void setGPUHint(hwc_context_t* ctx, hwc_display_contents_1_t* list);
+// Returns true if rect1 is peripheral to rect2, false otherwise.
+bool isPeripheral(const hwc_rect_t& rect1, const hwc_rect_t& rect2);
+
// Inline utility functions
static inline bool isSkipLayer(const hwc_layer_1_t* l) {
return (UNLIKELY(l && (l->flags & HWC_SKIP_LAYER)));