Async drawing!

Change-Id: I7e728356f58af88174328a8c0b90d27b128bfe01

1 files changed, 98 insertions, 0 deletions

diff --git a/libs/hwui/renderthread/DrawFrameTask.h b/libs/hwui/renderthread/DrawFrameTask.h
new file mode 100644
index 000000000000..5450dd57133e
--- /dev/null
+++ b/libs/hwui/renderthread/DrawFrameTask.h
@@ -0,0 +1,98 @@
+/*
+ * 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 DRAWFRAMETASK_H
+#define DRAWFRAMETASK_H
+
+#include <utils/Condition.h>
+#include <utils/Mutex.h>
+#include <utils/Vector.h>
+
+#include "RenderTask.h"
+
+#include "../Rect.h"
+
+namespace android {
+namespace uirenderer {
+
+class DeferredLayerUpdater;
+class DisplayListData;
+class RenderNode;
+
+namespace renderthread {
+
+class CanvasContext;
+class RenderThread;
+
+struct SetDisplayListData {
+    RenderNode* targetNode;
+    DisplayListData* newData;
+};
+
+/*
+ * This is a special Super Task. It is re-used multiple times by RenderProxy,
+ * and contains state (such as layer updaters & new DisplayListDatas) that is
+ * tracked across many frames not just a single frame.
+ * It is the sync-state task, and will kick off the post-sync draw
+ */
+class DrawFrameTask : public RenderTask {
+public:
+    DrawFrameTask();
+    virtual ~DrawFrameTask();
+
+    void setContext(CanvasContext* context);
+
+    void setDisplayListData(RenderNode* renderNode, DisplayListData* newData);
+    void addLayer(DeferredLayerUpdater* layer);
+    void removeLayer(DeferredLayerUpdater* layer);
+
+    void setRenderNode(RenderNode* renderNode);
+    void setDirty(int left, int top, int right, int bottom);
+    void drawFrame(RenderThread* renderThread);
+
+    virtual void run();
+
+private:
+    void syncFrameState();
+    void unblockUiThread();
+    static void drawRenderNode(CanvasContext* context, RenderNode* renderNode, Rect* dirty);
+
+    // This checks to see if there are any drawGlFunctors which would require
+    // a synchronous drawRenderNode()
+    static bool requiresSynchronousDraw(RenderNode* renderNode);
+
+    Mutex mLock;
+    Condition mSignal;
+
+    CanvasContext* mContext;
+
+    /*********************************************
+     *  Single frame data
+     *********************************************/
+    RenderNode* mRenderNode;
+    Rect mDirty;
+    Vector<SetDisplayListData> mDisplayListDataUpdates;
+
+    /*********************************************
+     *  Multi frame data
+     *********************************************/
+    Vector<DeferredLayerUpdater*> mLayers;
+};
+
+} /* namespace renderthread */
+} /* namespace uirenderer */
+} /* namespace android */
+
+#endif /* DRAWFRAMETASK_H */