Optimize FBO drawing with regions.

This optimization is currently disabled until Launcher is
modified to take advantage of it. The optimization can be
enabled by turning on RENDER_LAYERS_AS_REGIONS in the
OpenGLRenderer.h file.

Change-Id: I2fdf59d0f4dc690a3d7f712173ab8db3848b27b1

1 files changed, 13 insertions, 0 deletions

diff --git a/libs/hwui/Matrix.cpp b/libs/hwui/Matrix.cpp
index 83ea615d2263..7462d5bae208 100644
--- a/libs/hwui/Matrix.cpp
+++ b/libs/hwui/Matrix.cpp
@@ -271,6 +271,19 @@ void Matrix4::mapRect(Rect& r) const {
         MUL_ADD_STORE(r.right, data[kScaleX], data[kTranslateX]);
         MUL_ADD_STORE(r.top, data[kScaleY], data[kTranslateY]);
         MUL_ADD_STORE(r.bottom, data[kScaleY], data[kTranslateY]);
+
+        if (r.left > r.right) {
+            float x = r.left;
+            r.left = r.right;
+            r.right = x;
+        }
+
+        if (r.top > r.bottom) {
+            float y = r.top;
+            r.top = r.bottom;
+            r.bottom = y;
+        }
+
         return;
     }