renderer.h

 
#ifndef S_OPEN_XR_RENDERER_H
#define S_OPEN_XR_RENDERER_H
 
// Same as SO3Engine
enum RenderSystem
{
  XR_NONE_RENDER_SYSTEM = -1,
  XR_DIRECTX9_RENDERER,
  XR_DIRECTX11_RENDERER,
  XR_OPENGL_RENDERER,
  XR_OPENGL3_RENDERER,
  XR_VULKAN_RENDERER,
  XR_METAL_RENDERER,
  XR_TINY_RENDERER,
  XR_MAX_RENDERER
};
 
#ifdef _WIN32
# include "glad.h"
 
//linux (void*)glXGetProcAddressARB((const GLubyte*)procname);
//GLES (void*)eglGetProcAddress(name);
//apple return dlsym (RTLD_DEFAULT, name);
 
static void* getProcAddress(const char* procname)
{
  void* res = (void*)wglGetProcAddress(procname);
 
  if (!res)
  {
    static HMODULE libgl = LoadLibraryA("opengl32.dll");
    res = (void*)GetProcAddress(libgl, procname);
  }
 
  return res;
}
 
#elif defined(XR_USE_GRAPHICS_API_OPENGL_ES)
#include <GLES3/gl3.h>
#include <EGL/egl.h>
#else
# include <gl/GL.h>
#endif // _WIN32
 
struct IRenderer
{
  virtual ~IRenderer() = default;
 
  virtual const XrBaseInStructure* GetBindings() const = 0;
 
  // OpenXR instance-level extensions required by this platform.
  virtual const char* GetExtension() const = 0;
 
  virtual bool Setup() = 0;
  virtual bool Check(XrSystemId systemId, XrInstance instance) = 0;
  virtual bool GetSwapchainFormat(XrInstance instance, XrSession session, int64_t &format) = 0;
  virtual bool CreateSwapchainImage(XrInstance instance, uint32 viewCount, XrSwapchain swapchain, uint32_t pos) = 0;
  virtual void UpdateTextures(SCOL_PTR_TYPE leftTexture, SCOL_PTR_TYPE rightTexture, uint32_t acquiredIndex, int32_t width, int32_t height, uint32_t pos) = 0;
};
 
std::shared_ptr<IRenderer> CreateRenderer(RenderSystem rsys);
 
 
#endif