egl_dmabuf.h - mozsearch

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/*

 *  Copyright 2021 The WebRTC project authors. All Rights Reserved.

 *  Use of this source code is governed by a BSD-style license

 *  that can be found in the LICENSE file in the root of the source

 *  tree. An additional intellectual property rights grant can be found

 *  in the file PATENTS.  All contributing project authors may

 *  be found in the AUTHORS file in the root of the source tree.

*/

#ifndef MODULES_DESKTOP_CAPTURE_LINUX_WAYLAND_EGL_DMABUF_H_

#define MODULES_DESKTOP_CAPTURE_LINUX_WAYLAND_EGL_DMABUF_H_

#include <epoxy/egl.h>

#include <epoxy/gl.h>

#include <gbm.h>

#include <memory>

#include <optional>

#include <string>

#include <vector>

#include "modules/desktop_capture/desktop_geometry.h"

namespace webrtc {

class EglDmaBuf {

 public:

  struct EGLStruct {

    std::vector<std::string> extensions;

    EGLDisplay display = EGL_NO_DISPLAY;

    EGLContext context = EGL_NO_CONTEXT;

};

  struct PlaneData {

    int32_t fd;

    uint32_t stride;

    uint32_t offset;

};

  EglDmaBuf();

  ~EglDmaBuf();

  // Returns whether the image was successfully imported from

  // given DmaBuf and its parameters

  bool ImageFromDmaBuf(const DesktopSize& size,

                       uint32_t format,

                       const std::vector<PlaneData>& plane_datas,

                       uint64_t modifiers,

                       const DesktopVector& offset,

                       const DesktopSize& buffer_size,

                       uint8_t* data);

  std::vector<uint64_t> QueryDmaBufModifiers(uint32_t format);

  bool IsEglInitialized() const { return egl_initialized_; }

 private:

  bool GetClientExtensions(EGLDisplay dpy, EGLint name);

  bool egl_initialized_ = false;

  bool has_image_dma_buf_import_ext_ = false;

  int32_t drm_fd_ = -1;               // for GBM buffer mmap

  gbm_device* gbm_device_ = nullptr;  // for passed GBM buffer retrieval

  GLuint fbo_ = 0;

  GLuint texture_ = 0;

  EGLStruct egl_;

  std::optional<std::string> GetRenderNode();

};

}  // namespace webrtc

#endif  // MODULES_DESKTOP_CAPTURE_LINUX_WAYLAND_EGL_DMABUF_H_