DisplayList draw operation reordering

bug:8037003

The reordering enables similar operations to draw together, minimizing the
OpenGL state change operations that go inbetween draws. Eventually, multiple
complete canvas draw operations will be merged (into a single glDrawArrays call,
for example)

Reorders DisplayList draw operations when:

-They can move backwards in the command stream to be after similar
operations without violating draw ordering

-The OpenGLRenderer is in a simple, replayable state (no complex clip,
or filter/shadow etc)

Also adds two system properties to control the deferral/reordering:
    "debug.hwui.disable_draw_defer"
    "debug.hwui.disable_draw_reorder"
which can be set to "true" to control the display list manipulation

Change-Id: I5e89f3cb0ea2d2afd3e15c64d7f32b8406777a32

1 files changed, 7 insertions, 0 deletions

diff --git a/libs/hwui/Rect.h b/libs/hwui/Rect.h
index 5f4bb5a20913..f50ac3ccdb00 100644
--- a/libs/hwui/Rect.h
+++ b/libs/hwui/Rect.h
@@ -159,6 +159,13 @@ public:
         bottom += dy;
     }
 
+    void outset(float delta) {
+        left -= delta;
+        top -= delta;
+        right += delta;
+        bottom += delta;
+    }
+
     void snapToPixelBoundaries() {
         left = floorf(left + 0.5f);
         top = floorf(top + 0.5f);