windows-embedder/external__texture__d3d_8h_source.html

// Copyright 2013 The Flutter Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.


#ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_EXTERNAL_TEXTURE_D3D_H_

#define FLUTTER_SHELL_PLATFORM_WINDOWS_EXTERNAL_TEXTURE_D3D_H_


#include <memory>


#include "flutter/fml/macros.h"

#include "flutter/shell/platform/common/public/flutter_texture_registrar.h"

#include "flutter/shell/platform/windows/egl/manager.h"

#include "flutter/shell/platform/windows/egl/proc_table.h"

#include "flutter/shell/platform/windows/external_texture.h"


namespace flutter {


// An external texture that is backed by a DXGI surface.

class ExternalTextureD3d : public ExternalTexture {

 public:

  ExternalTextureD3d(

      FlutterDesktopGpuSurfaceType type,

      const FlutterDesktopGpuSurfaceTextureCallback texture_callback,

      void* user_data,

      const egl::Manager* egl_manager,

      std::shared_ptr<egl::ProcTable> gl);

  virtual ~ExternalTextureD3d();


  // |ExternalTexture|

  bool PopulateTexture(size_t width,

                       size_t height,

                       FlutterOpenGLTexture* opengl_texture) override;


 private:

  // Creates or updates the backing texture and associates it with the provided

  // surface.

  bool CreateOrUpdateTexture(

      const FlutterDesktopGpuSurfaceDescriptor* descriptor);

  // Detaches the previously attached surface, if any.

  void ReleaseImage();


  FlutterDesktopGpuSurfaceType type_;

  const FlutterDesktopGpuSurfaceTextureCallback texture_callback_;

  void* const user_data_;

  const egl::Manager* egl_manager_;

  std::shared_ptr<egl::ProcTable> gl_;

  GLuint gl_texture_ = 0;

  EGLSurface egl_surface_ = EGL_NO_SURFACE;

  void* last_surface_handle_ = nullptr;


  FML_DISALLOW_COPY_AND_ASSIGN(ExternalTextureD3d);

};


}  // namespace flutter


#endif  // FLUTTER_SHELL_PLATFORM_WINDOWS_EXTERNAL_TEXTURE_D3D_H_