/*
 * 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 TNT_FILAMENT_BACKEND_OPENGL_OPENGL_PLATFORM_COCOA_GL_H
#define TNT_FILAMENT_BACKEND_OPENGL_OPENGL_PLATFORM_COCOA_GL_H

#include <backend/platforms/OpenGLPlatform.h>

#include <stdint.h>

namespace filament::backend {

struct PlatformCocoaGLImpl;

/**
 * A concrete implementation of OpenGLPlatform that supports macOS's Cocoa.
 */
class PlatformCocoaGL : public OpenGLPlatform {
public:
    PlatformCocoaGL();
    ~PlatformCocoaGL() noexcept override;

    ExternalImageHandle UTILS_PUBLIC createExternalImage(void* cvPixelBuffer) noexcept;

protected:
    // --------------------------------------------------------------------------------------------
    // Platform Interface

    Driver* createDriver(void* sharedContext,
            const DriverConfig& driverConfig) override;

    // Currently returns 0
    int getOSVersion() const noexcept override;

    bool pumpEvents() noexcept override;

    // --------------------------------------------------------------------------------------------
    // OpenGLPlatform Interface

    bool isExtraContextSupported() const noexcept override;
    void createContext(bool shared) override;

    void terminate() noexcept override;

    SwapChain* createSwapChain(void* nativewindow, uint64_t flags) noexcept override;
    SwapChain* createSwapChain(uint32_t width, uint32_t height, uint64_t flags) noexcept override;
    void destroySwapChain(SwapChain* swapChain) noexcept override;
    bool makeCurrent(ContextType type, SwapChain* drawSwapChain, SwapChain* readSwapChain) override;
    void commit(SwapChain* swapChain) noexcept override;
    ExternalTexture* createExternalImageTexture() noexcept override;
    void destroyExternalImageTexture(ExternalTexture* texture) noexcept override;
    void retainExternalImage(void* externalImage) noexcept override;
    bool setExternalImage(void* externalImage, ExternalTexture* texture) noexcept override;
    void retainExternalImage(ExternalImageHandleRef externalImage) noexcept override;
    bool setExternalImage(ExternalImageHandleRef externalImage, ExternalTexture* texture) noexcept override;

private:
    PlatformCocoaGLImpl* pImpl = nullptr;
};

} // namespace filament::backend

#endif // TNT_FILAMENT_BACKEND_OPENGL_OPENGL_PLATFORM_COCOA_GL_H