Initial Contribution
diff --git a/libs/surfaceflinger/LayerBuffer.h b/libs/surfaceflinger/LayerBuffer.h
new file mode 100644
index 0000000..ef473dd
--- /dev/null
+++ b/libs/surfaceflinger/LayerBuffer.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2007 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 ANDROID_LAYER_BUFFER_H
+#define ANDROID_LAYER_BUFFER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/IMemory.h>
+#include <private/ui/LayerState.h>
+#include <GLES/eglnatives.h>
+
+#include "LayerBase.h"
+#include "LayerBitmap.h"
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+class MemoryDealer;
+class Region;
+
+class LayerBuffer : public LayerBaseClient
+{
+public:
+ static const uint32_t typeInfo;
+ static const char* const typeID;
+ virtual char const* getTypeID() const { return typeID; }
+ virtual uint32_t getTypeInfo() const { return typeInfo; }
+
+ LayerBuffer(SurfaceFlinger* flinger, DisplayID display,
+ Client* client, int32_t i);
+ virtual ~LayerBuffer();
+
+ virtual bool needsBlending() const;
+
+ virtual sp<LayerBaseClient::Surface> getSurface() const;
+ virtual void onDraw(const Region& clip) const;
+ virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
+
+ status_t registerBuffers(int w, int h, int hstride, int vstride,
+ PixelFormat format, const sp<IMemoryHeap>& heap);
+ void postBuffer(ssize_t offset);
+ void unregisterBuffers();
+ void invalidate();
+ void invalidateLocked();
+
+private:
+
+ struct NativeBuffer
+ {
+ copybit_image_t img;
+ copybit_rect_t crop;
+ };
+
+ class Buffer
+ {
+ public:
+ Buffer(const sp<IMemoryHeap>& heap, ssize_t offset,
+ int w, int h, int hs, int vs, int f);
+ inline void incStrong(void*) const {
+ android_atomic_inc(&mCount);
+ }
+ inline void decStrong(void*) const {
+ int32_t c = android_atomic_dec(&mCount);
+ //LOGE_IF(c<1, "Buffer::decStrong() called too many times");
+ if (c == 1) {
+ delete this;
+ }
+ }
+ inline status_t getStatus() const {
+ return mHeap!=0 ? NO_ERROR : NO_INIT;
+ }
+ inline const NativeBuffer& getBuffer() const {
+ return mNativeBuffer;
+ }
+ protected:
+ Buffer& operator = (const Buffer& rhs);
+ Buffer(const Buffer& rhs);
+ ~Buffer();
+ mutable volatile int32_t mCount;
+ private:
+ sp<IMemoryHeap> mHeap;
+ NativeBuffer mNativeBuffer;
+ };
+
+ class SurfaceBuffer : public LayerBaseClient::Surface
+ {
+ public:
+ SurfaceBuffer(SurfaceID id, LayerBuffer* owner);
+ virtual ~SurfaceBuffer();
+ virtual status_t registerBuffers(int w, int h, int hstride, int vstride,
+ PixelFormat format, const sp<IMemoryHeap>& heap);
+ virtual void postBuffer(ssize_t offset);
+ virtual void unregisterBuffers();
+ void disown();
+ private:
+ LayerBuffer* getOwner() const {
+ Mutex::Autolock _l(mLock);
+ return mOwner;
+ }
+ mutable Mutex mLock;
+ LayerBuffer* mOwner;
+ };
+
+ friend class SurfaceFlinger;
+ sp<Buffer> getBuffer() const;
+ void setBuffer(const sp<Buffer>& buffer);
+ sp<SurfaceBuffer> getClientSurface() const;
+
+ mutable Mutex mLock;
+ sp<IMemoryHeap> mHeap;
+ sp<Buffer> mBuffer;
+ int mWidth;
+ int mHeight;
+ int mHStride;
+ int mVStride;
+ int mFormat;
+ mutable GLuint mTextureName;
+ bool mInvalidate;
+ bool mNeedsBlending;
+ mutable wp<SurfaceBuffer> mClientSurface;
+ mutable sp<MemoryDealer> mTemporaryDealer;
+ mutable LayerBitmap mTempBitmap;
+};
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_LAYER_BUFFER_H