evs/sampleDriver/GlWrapper.h

/*
 * Copyright (C) 2017 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_HARDWARE_AUTOMOTIVE_EVS_V1_1_DISPLAY_GLWRAPPER_H
#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_DISPLAY_GLWRAPPER_H

#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GLES3/gl3.h>
#include <GLES3/gl3ext.h>

#include <android/frameworks/automotive/display/1.0/IAutomotiveDisplayProxyService.h>
#include <android/hardware/automotive/evs/1.1/types.h>
#include <android-base/logging.h>
#include <bufferqueueconverter/BufferQueueConverter.h>


using ::android::sp;
using ::android::SurfaceHolder;
using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
using BufferDesc_1_1 = ::android::hardware::automotive::evs::V1_1::BufferDesc;
using ::android::frameworks::automotive::display::V1_0::IAutomotiveDisplayProxyService;
using ::android::hardware::graphics::bufferqueue::V2_0::IGraphicBufferProducer;


class GlWrapper {
public:
    GlWrapper()
        : mSurfaceHolder(android::SurfaceHolderUniquePtr(nullptr, nullptr)) {}
    bool initialize(sp<IAutomotiveDisplayProxyService> pWindowService, uint64_t displayId);
    void shutdown();

    bool updateImageTexture(const BufferDesc_1_0& buffer);
    bool updateImageTexture(const BufferDesc_1_1& buffer);
    void renderImageToScreen();

    void showWindow(sp<IAutomotiveDisplayProxyService>& pWindowService, uint64_t id);
    void hideWindow(sp<IAutomotiveDisplayProxyService>& pWindowService, uint64_t id);

    unsigned getWidth()     { return mWidth; };
    unsigned getHeight()    { return mHeight; };

private:
    sp<IGraphicBufferProducer>  mGfxBufferProducer;

    EGLDisplay                  mDisplay;
    EGLSurface                  mSurface;
    EGLContext                  mContext;

    unsigned mWidth  = 0;
    unsigned mHeight = 0;

    EGLImageKHR mKHRimage = EGL_NO_IMAGE_KHR;

    GLuint mTextureMap    = 0;
    GLuint mShaderProgram = 0;

    // Opaque handle for a native hardware buffer defined in
    // frameworks/native/opengl/include/EGL/eglplatform.h
    ANativeWindow*                  mWindow;

    // Pointer to a Surface wrapper.
    android::SurfaceHolderUniquePtr mSurfaceHolder;
};

#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_DISPLAY_GLWRAPPER_H