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/*
* 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_H
#define ANDROID_LAYER_H
#include <stdint.h>
#include <sys/types.h>
#include <ui/GraphicBuffer.h>
#include <ui/PixelFormat.h>
#include <pixelflinger/pixelflinger.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <GLES/glext.h>
#include "LayerBase.h"
#include "Transform.h"
#include "TextureManager.h"
namespace android {
// ---------------------------------------------------------------------------
class Client;
class FreezeLock;
// ---------------------------------------------------------------------------
class Layer : public LayerBaseClient
{
public:
// lcblk is (almost) only accessed from the main SF thread, in the places
// where it's not, a reference to Client must be held
SharedBufferServer* lcblk;
Layer(SurfaceFlinger* flinger, DisplayID display,
const sp<Client>& client, int32_t i);
virtual ~Layer();
status_t setBuffers(uint32_t w, uint32_t h,
PixelFormat format, uint32_t flags=0);
void setBufferSize(uint32_t w, uint32_t h);
bool isFixedSize() const;
virtual void onDraw(const Region& clip) const;
virtual uint32_t doTransaction(uint32_t transactionFlags);
virtual void lockPageFlip(bool& recomputeVisibleRegions);
virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
virtual void finishPageFlip();
virtual bool needsBlending() const { return mNeedsBlending; }
virtual bool needsDithering() const { return mNeedsDithering; }
virtual bool needsFiltering() const;
virtual bool isSecure() const { return mSecure; }
virtual sp<Surface> createSurface() const;
virtual status_t ditch();
virtual void onRemoved();
// only for debugging
inline sp<GraphicBuffer> getBuffer(int i) const { return mBufferManager.getBuffer(i); }
// only for debugging
inline const sp<FreezeLock>& getFreezeLock() const { return mFreezeLock; }
// only for debugging
inline PixelFormat pixelFormat() const { return mFormat; }
virtual const char* getTypeId() const { return "Layer"; }
protected:
virtual void dump(String8& result, char* scratch, size_t size) const;
private:
void reloadTexture(const Region& dirty);
uint32_t getEffectiveUsage(uint32_t usage) const;
sp<GraphicBuffer> requestBuffer(int bufferIdx,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
status_t setBufferCount(int bufferCount);
class SurfaceLayer : public LayerBaseClient::Surface {
public:
SurfaceLayer(const sp<SurfaceFlinger>& flinger,
SurfaceID id, const sp<Layer>& owner);
~SurfaceLayer();
private:
virtual sp<GraphicBuffer> requestBuffer(int bufferIdx,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
virtual status_t setBufferCount(int bufferCount);
sp<Layer> getOwner() const {
return static_cast<Layer*>(Surface::getOwner().get());
}
};
friend class SurfaceLayer;
sp<Surface> mSurface;
bool mSecure;
int32_t mFrontBufferIndex;
bool mNeedsBlending;
bool mNeedsDithering;
Region mPostedDirtyRegion;
sp<FreezeLock> mFreezeLock;
PixelFormat mFormat;
class BufferManager {
static const size_t NUM_BUFFERS = 2;
struct BufferData {
sp<GraphicBuffer> buffer;
Image texture;
};
// this lock protect mBufferData[].buffer but since there
// is very little contention, we have only one like for
// the whole array, we also use it to protect mNumBuffers.
mutable Mutex mLock;
BufferData mBufferData[SharedBufferStack::NUM_BUFFER_MAX];
size_t mNumBuffers;
Texture mFailoverTexture;
TextureManager& mTextureManager;
ssize_t mActiveBuffer;
bool mFailover;
static status_t destroyTexture(Image* tex, EGLDisplay dpy);
public:
static size_t getDefaultBufferCount() { return NUM_BUFFERS; }
BufferManager(TextureManager& tm);
~BufferManager();
// detach/attach buffer from/to given index
sp<GraphicBuffer> detachBuffer(size_t index);
status_t attachBuffer(size_t index, const sp<GraphicBuffer>& buffer);
// resize the number of active buffers
status_t resize(size_t size);
// ----------------------------------------------
// must be called from GL thread
// set/get active buffer index
status_t setActiveBufferIndex(size_t index);
size_t getActiveBufferIndex() const;
// return the active buffer
sp<GraphicBuffer> getActiveBuffer() const;
// return the active texture (or fail-over)
Texture getActiveTexture() const;
// frees resources associated with all buffers
status_t destroy(EGLDisplay dpy);
// load bitmap data into the active buffer
status_t loadTexture(const Region& dirty, const GGLSurface& t);
// make active buffer an EGLImage if needed
status_t initEglImage(EGLDisplay dpy,
const sp<GraphicBuffer>& buffer);
// ----------------------------------------------
// only for debugging
sp<GraphicBuffer> getBuffer(size_t index) const;
};
TextureManager mTextureManager;
BufferManager mBufferManager;
// this lock protects mWidth and mHeight which are accessed from
// the main thread and requestBuffer's binder transaction thread.
mutable Mutex mLock;
uint32_t mWidth;
uint32_t mHeight;
uint32_t mReqWidth;
uint32_t mReqHeight;
uint32_t mReqFormat;
bool mFixedSize;
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_LAYER_H
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