/*
 * Copyright (c) Hisilicon Technologies Co., Ltd. 2021-2023. All rights reserved.
 * Description: ImageTarget for output
 * Author: Hisilicon
 * Created: 2021.04.16
 */

#ifndef IMAGEKIT_IMAGE_TARGET_H
#define IMAGEKIT_IMAGE_TARGET_H

#include <atomic>

#include "ImageBuf.h"
#include "ImageTexture.h"

namespace PhoenixImage {
/* *
 * @brief Image Render target class. .
 */
class ImageTarget : public ImageTexture {
public:
    /**
     * @brief ImageTexture constructor, generate fbo internal.
     * @param [in] imageTexture: The ImageTexture bind to the fbo.
     */
    ImageTarget(BufHolder *buFHolder, int32_t width, int32_t height);

    /**
     * @brief ImageTexture constructor, using external fbo.
     * @param [in] imageTexture: The ImageTexture bind to the fbo.
     * @param [in] framebuffer: The fbo generated outside.
     */
    ImageTarget(uint32_t tex, uint32_t textureTarget, int32_t width, int32_t height, uint32_t framebuffer);

    /**
     * @brief ImageTexture destructor.
     */
    ~ImageTarget();

    /**
     * @brief acquires the most recently putted buffer by BufHolder, and sets the image contents of the target
     * framebuffer to it .
     */
    int32_t UpdateTargetImage();

    /**
     * @brief increase reference count_ of the object.
     */
    void IncRef()
    {
        count_.fetch_add(1, std::memory_order_relaxed);
    }

    /**
     * @brief decrease reference count_ of the object, the object will be freed if reference count_ is 0.
     */
    size_t DecRef()
    {
        return count_.fetch_sub(1, std::memory_order_acq_rel);
    }

protected:
    mutable std::atomic_size_t count_;
    uint32_t frameBuffer_;
    bool needFreeFBO_;
};
} /* namespace PhoenixImage */

#endif