GHOST_ContextD3D.hh

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/* SPDX-FileCopyrightText: 2014-2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#ifndef WIN32
#  error WIN32 only!
#endif  // WIN32
 
#include <D3D11.h>
 
#include "GHOST_Context.hh"
 
class GHOST_ContextD3D : public GHOST_Context {
  /* XR code needs low level graphics data to send to OpenXR. */
  friend class GHOST_XrGraphicsBindingD3D;
  friend class GHOST_XrGraphicsBindingOpenGLD3D;
  friend class GHOST_XrGraphicsBindingVulkanD3D;
 
 public:
  GHOST_ContextD3D(const GHOST_ContextParams &context_params, HWND hWnd);
  ~GHOST_ContextD3D() override;

  GHOST_TSuccess swapBufferAcquire() override
  {
    return GHOST_kSuccess;
  }

  GHOST_TSuccess swapBufferRelease() override;

  GHOST_TSuccess activateDrawingContext() override;

  GHOST_TSuccess releaseDrawingContext() override;

  GHOST_TSuccess initializeDrawingContext() override;

  GHOST_TSuccess updateDrawingContext() override
  {
    return GHOST_kFailure;
  }

  GHOST_TSuccess releaseNativeHandles() override;

  GHOST_TSuccess setSwapInterval(int /*interval*/) override
  {
    return GHOST_kFailure;
  }

  GHOST_TSuccess getSwapInterval(int & /*unused*/) override
  {
    return GHOST_kFailure;
  }

  unsigned int getDefaultFramebuffer() override
  {
    return 0;
  }
 
  class GHOST_SharedOpenGLResource *createSharedOpenGLResource(
      unsigned int width,
      unsigned int height,
      DXGI_FORMAT format,
      ID3D11RenderTargetView *render_target);
  class GHOST_SharedOpenGLResource *createSharedOpenGLResource(unsigned int width,
                                                               unsigned int height,
                                                               DXGI_FORMAT format);
  void disposeSharedOpenGLResource(class GHOST_SharedOpenGLResource *shared_res);
  GHOST_TSuccess blitFromOpenGLContext(class GHOST_SharedOpenGLResource *shared_res,
                                       unsigned int width,
                                       unsigned int height);
  ID3D11Texture2D *getSharedTexture2D(class GHOST_SharedOpenGLResource *shared_res);
 
  bool isUpsideDown() const override
  {
    return true;
  }
 
 private:
  GHOST_TSuccess setupD3DLib();
 
  static HMODULE s_d3d_lib;
  static PFN_D3D11_CREATE_DEVICE s_D3D11CreateDeviceFn;
 
  HWND h_wnd_;
 
  ID3D11Device *device_;
  ID3D11DeviceContext *device_ctx_;
};