include/surfaceflinger/ISurface.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_SF_ISURFACE_H
#define ANDROID_SF_ISURFACE_H

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

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

#include <binder/IInterface.h>

#include <ui/PixelFormat.h>

#include <hardware/hardware.h>
#include <hardware/gralloc.h>

namespace android {

typedef int32_t    SurfaceID;

class IMemoryHeap;
class OverlayRef;
class GraphicBuffer;

class ISurface : public IInterface
{
protected:
    enum {
        REGISTER_BUFFERS = IBinder::FIRST_CALL_TRANSACTION,
        UNREGISTER_BUFFERS,
        POST_BUFFER, // one-way transaction
        CREATE_OVERLAY,
        REQUEST_BUFFER,
        SET_BUFFER_COUNT,
    };

public: 
    DECLARE_META_INTERFACE(Surface);

    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage) = 0; 
    virtual status_t setBufferCount(int bufferCount) = 0;
    
    class BufferHeap {
    public:
        enum {
            /* rotate source image */
            ROT_0     = 0,
            ROT_90    = HAL_TRANSFORM_ROT_90,
            ROT_180   = HAL_TRANSFORM_ROT_180,
            ROT_270   = HAL_TRANSFORM_ROT_270,
        };
        BufferHeap();
        
        BufferHeap(uint32_t w, uint32_t h,
                int32_t hor_stride, int32_t ver_stride, 
                PixelFormat format, const sp<IMemoryHeap>& heap);
        
        BufferHeap(uint32_t w, uint32_t h,
                int32_t hor_stride, int32_t ver_stride, 
                PixelFormat format, uint32_t transform, uint32_t flags,
                const sp<IMemoryHeap>& heap);
        
        ~BufferHeap(); 
        
        uint32_t w;
        uint32_t h;
        int32_t hor_stride;
        int32_t ver_stride;
        PixelFormat format;
        uint32_t transform;
        uint32_t flags;
        sp<IMemoryHeap> heap;
    };
    
    virtual status_t registerBuffers(const BufferHeap& buffers) = 0;
    virtual void postBuffer(ssize_t offset) = 0; // one-way
    virtual void unregisterBuffers() = 0;
    
    virtual sp<OverlayRef> createOverlay(
            uint32_t w, uint32_t h, int32_t format, int32_t orientation) = 0;
};

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

class BnSurface : public BnInterface<ISurface>
{
public:
    virtual status_t    onTransact( uint32_t code,
                                    const Parcel& data,
                                    Parcel* reply,
                                    uint32_t flags = 0);
};

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

}; // namespace android

#endif // ANDROID_SF_ISURFACE_H