Even FASTER damage calculations!

 * Now with more native!
 * Less matrix math thanks to bulk-property-update support!
 * Zero JNI on the View.damageInParent() path!
 * Fully aware of RT-driven animators!
 * Likely full of new and exciting bugs!
 * But it also fixes at least 1 existing invalidate bug!

Change-Id: Ie0773f85a60850ff2668370c58defef2e8aa079f

1 files changed, 57 insertions, 0 deletions

diff --git a/libs/hwui/DamageAccumulator.h b/libs/hwui/DamageAccumulator.h
new file mode 100644
index 000000000000..c62a351fc9d0
--- /dev/null
+++ b/libs/hwui/DamageAccumulator.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef DAMAGEACCUMULATOR_H
+#define DAMAGEACCUMULATOR_H
+
+#include <utils/LinearAllocator.h>
+
+#include <SkMatrix.h>
+#include <SkRect.h>
+
+#include "utils/Macros.h"
+
+namespace android {
+namespace uirenderer {
+
+struct DirtyStack;
+class RenderNode;
+
+class DamageAccumulator {
+    PREVENT_COPY_AND_ASSIGN(DamageAccumulator);
+public:
+    DamageAccumulator();
+    // mAllocator will clean everything up for us, no need for a dtor
+
+    // Push a transform node onto the stack. This should be called prior
+    // to any dirty() calls. Subsequent calls to dirty()
+    // will be affected by the node's transform when popNode() is called.
+    void pushNode(const RenderNode* node);
+    // Pops a transform node from the stack, propagating the dirty rect
+    // up to the parent node.
+    void popNode();
+    void dirty(float left, float top, float right, float bottom);
+
+    void finish(SkRect* totalDirty);
+
+private:
+    LinearAllocator mAllocator;
+    DirtyStack* mHead;
+};
+
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* DAMAGEACCUMULATOR_H */