libhwcomposer: Enhance mixed mode composition.
While marking layers for cache, neglect the z-order when
possible, to improve the scope of mixed mode usage.
It is safe to neglect the z-order if a static layer
doesn't have any overlapping region with updating layers
in between static layer & contiguous static layers batch.
- if above layer doesn't have any overlapping with updating
layer in middle, push it to the batch.
- If above case fails, but layers below(existing batch) does not
have any overlapping region with the updating layer, bring the
batch to top and modify fb-zorder accordingly.
Change-Id: I4882a750d0a9a2e11272fcbb146202160673d04f
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index 3b5d3cb..4ed86dd 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -186,13 +186,14 @@
void dumpsys_log(android::String8& buf, const char* fmt, ...);
int getExtOrientation(hwc_context_t* ctx);
-
bool isValidRect(const hwc_rect_t& rect);
void deductRect(const hwc_layer_1_t* layer, hwc_rect_t& irect);
hwc_rect_t getIntersection(const hwc_rect_t& rect1, const hwc_rect_t& rect2);
hwc_rect_t getUnion(const hwc_rect_t& rect1, const hwc_rect_t& rect2);
void optimizeLayerRects(hwc_context_t *ctx,
- const hwc_display_contents_1_t *list, const int& dpy);
+ const hwc_display_contents_1_t *list, const int& dpy);
+bool areLayersIntersecting(const hwc_layer_1_t* layer1,
+ const hwc_layer_1_t* layer2);
/* Calculates the destination position based on the action safe rectangle */
void getActionSafePosition(hwc_context_t *ctx, int dpy, hwc_rect_t& dst);