Clipping performance improvements

Create a ClipArea class to handle tracking clip regions. This class can
select the most efficient implementation depending on the types of
clipping presented.

ClipArea re-used the rectangle and region-based clipping
implementations as well as adding a "list of rotated rectangles"
approach that is more efficient for rotated views with children.

Change-Id: I2133761a2462ebc0852b394220e265974b3086f0

1 files changed, 12 insertions, 0 deletions

diff --git a/libs/hwui/Rect.h b/libs/hwui/Rect.h
index b046b6fb8be9..1716cf0ccb91 100644
--- a/libs/hwui/Rect.h
+++ b/libs/hwui/Rect.h
@@ -111,6 +111,10 @@ public:
         set(r.left, r.top, r.right, r.bottom);
     }
 
+    inline void set(const SkIRect& r) {
+        set(r.left(), r.top(), r.right(), r.bottom());
+    }
+
     inline float getWidth() const {
         return right - left;
     }
@@ -248,6 +252,14 @@ public:
         bottom = fmaxf(bottom, y);
     }
 
+    SkRect toSkRect() const {
+        return SkRect::MakeLTRB(left, top, right, bottom);
+    }
+
+    SkIRect toSkIRect() const {
+        return SkIRect::MakeLTRB(left, top, right, bottom);
+    }
+
     void dump(const char* label = nullptr) const {
         ALOGD("%s[l=%f t=%f r=%f b=%f]", label ? label : "Rect", left, top, right, bottom);
     }