GHOST_IXrGraphicsBinding.hh

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/* SPDX-FileCopyrightText: 2020-2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once
 
#include <memory>
#include <optional>
#include <string>
#include <vector>
 
#include "GHOST_Xr_openxr_includes.hh"
 
class GHOST_IXrGraphicsBinding {
 public:
  union {
#if defined(WITH_GHOST_X11)
    XrGraphicsBindingEGLMNDX egl;
    XrGraphicsBindingOpenGLXlibKHR glx;
#elif defined(WIN32)
    XrGraphicsBindingOpenGLWin32KHR wgl;
    XrGraphicsBindingD3D11KHR d3d11;
#endif
#if defined(WITH_GHOST_WAYLAND)
    XrGraphicsBindingOpenGLWaylandKHR wl;
#endif
#ifdef WITH_VULKAN_BACKEND
    XrGraphicsBindingVulkanKHR vk;
#endif
  } oxr_binding;
 
  virtual ~GHOST_IXrGraphicsBinding() = default;

  virtual bool checkVersionRequirements(class GHOST_Context &ghost_ctx,
                                        XrInstance instance,
                                        XrSystemId system_id,
                                        std::string *r_requirement_info) const = 0;
  virtual void initFromGhostContext(class GHOST_Context &ghost_ctx,
                                    XrInstance instance,
                                    XrSystemId system_id) = 0;
  virtual std::optional<int64_t> chooseSwapchainFormat(const std::vector<int64_t> &runtime_formats,
                                                       GHOST_TXrSwapchainFormat &r_format,
                                                       bool &r_is_rgb_format) const = 0;
  virtual std::vector<XrSwapchainImageBaseHeader *> createSwapchainImages(
      uint32_t image_count) = 0;
  virtual void submitToSwapchainBegin() = 0;
  virtual void submitToSwapchainImage(XrSwapchainImageBaseHeader &swapchain_image,
                                      const GHOST_XrDrawViewInfo &draw_info) = 0;
  virtual void submitToSwapchainEnd() = 0;
  virtual bool needsUpsideDownDrawing(GHOST_Context &ghost_ctx) const = 0;
 
 protected:
  /* Use GHOST_XrGraphicsBindingCreateFromType! */
  GHOST_IXrGraphicsBinding() = default;
};
 
std::unique_ptr<GHOST_IXrGraphicsBinding> GHOST_XrGraphicsBindingCreateFromType(
    GHOST_TXrGraphicsBinding type, GHOST_Context &context);