include/ui/Surface.h

/*
 * 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_UI_SURFACE_H
#define ANDROID_UI_SURFACE_H

#include <stdint.h>
#include <sys/types.h>

#include <utils/RefBase.h>
#include <utils/threads.h>

#include <ui/ISurface.h>
#include <ui/PixelFormat.h>
#include <ui/Region.h>
#include <ui/ISurfaceFlingerClient.h>

#include <EGL/android_natives.h>

namespace android {

// ---------------------------------------------------------------------------

class BufferMapper;
class Rect;
class Surface;
class SurfaceComposerClient;
struct per_client_cblk_t;
struct layer_cblk_t;

// ---------------------------------------------------------------------------

class SurfaceBuffer 
    : public EGLNativeBase<
        android_native_buffer_t, 
        SurfaceBuffer, 
        LightRefBase<SurfaceBuffer> >
{
public:
    buffer_handle_t getHandle() const {
        return handle;
    }
    
    status_t lock(uint32_t usage);
    status_t lock(uint32_t usage, const Rect& rect);
    status_t unlock();

protected:
            SurfaceBuffer();
            SurfaceBuffer(const Parcel& reply);
    virtual ~SurfaceBuffer();
    buffer_handle_t handle;
    bool mOwner;

    inline const BufferMapper& getBufferMapper() const { return mBufferMapper; }
    inline BufferMapper& getBufferMapper() { return mBufferMapper; }
    
private:
    friend class Surface;
    friend class BpSurface;
    friend class BnSurface;
    friend class LightRefBase<SurfaceBuffer>;    

    SurfaceBuffer& operator = (const SurfaceBuffer& rhs);
    const SurfaceBuffer& operator = (const SurfaceBuffer& rhs) const;

    static status_t writeToParcel(Parcel* reply, 
            android_native_buffer_t const* buffer);
    
    static int getHandle(android_native_buffer_t const * base, 
            buffer_handle_t* handle);
    
    BufferMapper& mBufferMapper;
};

// ---------------------------------------------------------------------------
class Surface;

class SurfaceControl : public RefBase
{
public:
    static bool isValid(const sp<SurfaceControl>& surface) {
        return (surface != 0) && surface->isValid();
    }
    bool isValid() {
        return mToken>=0 && mClient!=0;
    }
    static bool isSameSurface(
            const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs);
        
    SurfaceID   ID() const      { return mToken; }
    uint32_t    getFlags() const { return mFlags; }
    uint32_t    getIdentity() const { return mIdentity; }

    // release surface data from java
    void        clear();
    
    status_t    setLayer(int32_t layer);
    status_t    setPosition(int32_t x, int32_t y);
    status_t    setSize(uint32_t w, uint32_t h);
    status_t    hide();
    status_t    show(int32_t layer = -1);
    status_t    freeze();
    status_t    unfreeze();
    status_t    setFlags(uint32_t flags, uint32_t mask);
    status_t    setTransparentRegionHint(const Region& transparent);
    status_t    setAlpha(float alpha=1.0f);
    status_t    setMatrix(float dsdx, float dtdx, float dsdy, float dtdy);
    status_t    setFreezeTint(uint32_t tint);

    static status_t writeSurfaceToParcel(
            const sp<SurfaceControl>& control, Parcel* parcel);

    sp<Surface> getSurface() const;

private:
    // can't be copied
    SurfaceControl& operator = (SurfaceControl& rhs);
    SurfaceControl(const SurfaceControl& rhs);

    
    friend class SurfaceComposerClient;

    // camera and camcorder need access to the ISurface binder interface for preview
    friend class Camera;
    friend class MediaRecorder;
    // mediaplayer needs access to ISurface for display
    friend class MediaPlayer;
    // for testing
    friend class Test;
    const sp<ISurface>& getISurface() const { return mSurface; }
    

    friend class Surface;

    SurfaceControl(
            const sp<SurfaceComposerClient>& client,
            const sp<ISurface>& surface,
            const ISurfaceFlingerClient::surface_data_t& data,
            uint32_t w, uint32_t h, PixelFormat format, uint32_t flags);

    ~SurfaceControl();

    status_t validate(per_client_cblk_t const* cblk) const;
    void destroy();
    
    sp<SurfaceComposerClient>   mClient;
    sp<ISurface>                mSurface;
    SurfaceID                   mToken;
    uint32_t                    mIdentity;
    PixelFormat                 mFormat;
    uint32_t                    mFlags;
    mutable Mutex               mLock;
    
    mutable sp<Surface>         mSurfaceData;
};
    
// ---------------------------------------------------------------------------

class Surface 
    : public EGLNativeBase<android_native_window_t, Surface, RefBase>
{
public:
    struct SurfaceInfo {
        uint32_t    w;
        uint32_t    h;
        uint32_t    s;
        uint32_t    usage;
        PixelFormat format;
        void*       bits;
        uint32_t    reserved[2];
    };

    Surface(const Parcel& data);

    static bool isValid(const sp<Surface>& surface) {
        return (surface != 0) && surface->isValid();
    }
    bool isValid() {
        return mToken>=0 && mClient!=0;
    }
    static bool isSameSurface(
            const sp<Surface>& lhs, const sp<Surface>& rhs);
    SurfaceID   ID() const      { return mToken; }
    uint32_t    getFlags() const { return mFlags; }
    uint32_t    getIdentity() const { return mIdentity; }


    status_t    lock(SurfaceInfo* info, bool blocking = true);
    status_t    lock(SurfaceInfo* info, Region* dirty, bool blocking = true);
    status_t    unlockAndPost();

    // setSwapRectangle() is intended to be used by GL ES clients
    void        setSwapRectangle(const Rect& r);

private:
    // can't be copied
    Surface& operator = (Surface& rhs);
    Surface(const Surface& rhs);

    Surface(const sp<SurfaceControl>& control);
    void init();
     ~Surface();
  
    friend class SurfaceComposerClient;
    friend class SurfaceControl;

    // camera and camcorder need access to the ISurface binder interface for preview
    friend class Camera;
    friend class MediaRecorder;
    // mediaplayer needs access to ISurface for display
    friend class MediaPlayer;
    friend class Test;
    const sp<ISurface>& getISurface() const { return mSurface; }

    status_t getBufferLocked(int index);
   
           status_t validate(per_client_cblk_t const* cblk) const;
    static void _send_dirty_region(layer_cblk_t* lcblk, const Region& dirty);

    inline const BufferMapper& getBufferMapper() const { return mBufferMapper; }
    inline BufferMapper& getBufferMapper() { return mBufferMapper; }
    
    static int setSwapInterval(android_native_window_t* window, int interval);
    static int dequeueBuffer(android_native_window_t* window, android_native_buffer_t** buffer);
    static int lockBuffer(android_native_window_t* window, android_native_buffer_t* buffer);
    static int queueBuffer(android_native_window_t* window, android_native_buffer_t* buffer);

    int dequeueBuffer(android_native_buffer_t** buffer);
    int lockBuffer(android_native_buffer_t* buffer);
    int queueBuffer(android_native_buffer_t* buffer);

    status_t dequeueBuffer(sp<SurfaceBuffer>* buffer);
    status_t lockBuffer(const sp<SurfaceBuffer>& buffer);
    status_t queueBuffer(const sp<SurfaceBuffer>& buffer);

    
    alloc_device_t*             mAllocDevice;
    sp<SurfaceComposerClient>   mClient;
    sp<ISurface>                mSurface;
    sp<SurfaceBuffer>           mBuffers[2];
    sp<SurfaceBuffer>           mLockedBuffer;
    SurfaceID                   mToken;
    uint32_t                    mIdentity;
    PixelFormat                 mFormat;
    uint32_t                    mFlags;
    mutable Region              mDirtyRegion;
    mutable Region              mOldDirtyRegion;
    mutable uint8_t             mBackbufferIndex;
    mutable Mutex               mSurfaceLock;
    Rect                        mSwapRectangle;
    BufferMapper&               mBufferMapper;
};

}; // namespace android

#endif // ANDROID_UI_SURFACE_H