libhwcomposer/hwc_copybit.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
 *
 * Not a Contribution, Apache license notifications and license are retained
 * for attribution purposes only.
 *
 * 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 HWC_COPYBIT_H
#define HWC_COPYBIT_H
#include "hwc_utils.h"
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <gralloc_priv.h>
#include <gr.h>
#include <dlfcn.h>

#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))

namespace qhwc {
//Feature for using Copybit to display RGB layers.
typedef EGLClientBuffer (*functype_eglGetRenderBufferANDROID) (
                                              EGLDisplay dpy,
                                              EGLSurface draw);
typedef EGLSurface (*functype_eglGetCurrentSurface)(EGLint readdraw);

class CopyBit {
public:
    //Sets up members and prepares copybit if conditions are met
    static bool prepare(hwc_context_t *ctx, hwc_layer_list_t *list);
    //Draws layer if the layer is set for copybit in prepare
    static bool draw(hwc_context_t *ctx, hwc_layer_list_t *list, EGLDisplay dpy,
                                                                EGLSurface sur);
    //Receives data from hwc
    static void setStats(int yuvCount, int yuvLayerIndex, bool isYuvLayerSkip);

    static void updateEglHandles(void*);
    static int  drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_t *layer,
                                        EGLDisplay dpy, EGLSurface surface,
        functype_eglGetRenderBufferANDROID& LINK_eglGetRenderBufferANDROID,
                  functype_eglGetCurrentSurface LINK_eglGetCurrentSurface);
    static bool canUseCopybit(hwc_context_t* ctx, const hwc_layer_list_t* list,
                                                      const int numYUVBuffers);
    static void closeEglLib();
    static void openEglLibAndGethandle();
private:
    //Marks layer flags if this feature is used
    static void markFlags(hwc_layer_t *layer);
    //returns yuv count
    static int getYuvCount();

    //Number of yuv layers in this drawing round
    static int sYuvCount;
    //Index of YUV layer, relevant only if count is 1
    static int sYuvLayerIndex;
    //Flags if a yuv layer is animating or below something that is animating
    static bool sIsLayerSkip;
    //Flags if this feature is on.
    static bool sIsModeOn;
    //handle for adreno lib
    static void* egl_lib;

    static functype_eglGetRenderBufferANDROID LINK_eglGetRenderBufferANDROID;
    static functype_eglGetCurrentSurface LINK_eglGetCurrentSurface;

    static void getLayerResolution(const hwc_layer_t* layer, int& width,
                                                           int& height);

};

class CopybitEngine {
public:
    ~CopybitEngine();
    // API to get copybit engine(non static)
    struct copybit_device_t *getEngine();
    // API to get singleton
    static CopybitEngine* getInstance();
private:
    CopybitEngine();
    struct copybit_device_t *sEngine;
    static CopybitEngine* sInstance; // singleton
};


inline void CopyBit::setStats(int yuvCount, int yuvLayerIndex,
        bool isYuvLayerSkip) {
    sYuvCount = yuvCount;
    sYuvLayerIndex = yuvLayerIndex;
    sIsLayerSkip = isYuvLayerSkip;
}

inline int CopyBit::getYuvCount() { return sYuvCount; }


}; //namespace qhwc

#endif //HWC_COPYBIT_H