/**
* Build an OpenGL window, respecting the Rift's current display mode choice of
* extended or direct HMD.
*/
GLFWwindow * createRiftRenderingWindow(ovrHmd hmd, glm::uvec2 & outSize, glm::ivec2 & outPosition) {
bool extendedMode = true;
outPosition = glm::ivec2(hmd->WindowsPos.x, hmd->WindowsPos.y);
outSize = glm::uvec2(hmd->Resolution.w, hmd->Resolution.h);
// The ovrHmdCap_ExtendDesktop is currently only reported reliably on Windows
ON_WINDOWS([&] {
extendedMode = (ovrHmdCap_ExtendDesktop & hmd->HmdCaps);
});
return extendedMode
? createExtendedModeWindow(outSize, outPosition)
: createDirectHmdModeWindow(hmd, outSize);
}
void * getNativeWindowHandle(GLFWwindow * window)
{
void * nativeWindowHandle = nullptr;
ON_WINDOWS([&]
{
nativeWindowHandle = (void*)glfwGetWin32Window(window);
});
ON_LINUX([&]
{
nativeWindowHandle = (void*)glfwGetX11Window(window);
});
ON_MAC([&]
{
nativeWindowHandle = (void*)glfwGetCocoaWindow(window);
});
return nativeWindowHandle;
}
void RiftRenderingApp::initializeRiftRendering() {
ovrGLConfig cfg;
memset(&cfg, 0, sizeof(cfg));
cfg.OGL.Header.API = ovrRenderAPI_OpenGL;
cfg.OGL.Header.BackBufferSize = ovr::fromGlm(hmdNativeResolution);
cfg.OGL.Header.Multisample = 1;
ON_WINDOWS([&]{
cfg.OGL.Window = (HWND)getNativeWindow();
});
int distortionCaps = 0
| ovrDistortionCap_Vignette
| ovrDistortionCap_Overdrive
| ovrDistortionCap_TimeWarp;
ON_LINUX([&]{
distortionCaps |= ovrDistortionCap_LinuxDevFullscreen;
});
ovrEyeRenderDesc eyeRenderDescs[2];
int configResult = ovrHmd_ConfigureRendering(hmd, &cfg.Config,
distortionCaps, hmd->MaxEyeFov, eyeRenderDescs);
assert(configResult);
for_each_eye([&](ovrEyeType eye){
const ovrEyeRenderDesc & erd = eyeRenderDescs[eye];
ovrMatrix4f ovrPerspectiveProjection = ovrMatrix4f_Projection(erd.Fov, 0.01f, 100000.0f, true);
projections[eye] = ovr::toGlm(ovrPerspectiveProjection);
eyeOffsets[eye] = erd.HmdToEyeViewOffset;
});
// Allocate the frameBuffer that will hold the scene, and then be
// re-rendered to the screen with distortion
glm::uvec2 frameBufferSize = ovr::toGlm(eyeTextures[0].Header.TextureSize);
for_each_eye([&](ovrEyeType eye) {
eyeFramebuffers[eye] = FramebufferWrapperPtr(new FramebufferWrapper());
eyeFramebuffers[eye]->init(frameBufferSize);
((ovrGLTexture&)(eyeTextures[eye])).OGL.TexId =
oglplus::GetName(eyeFramebuffers[eye]->color);
});
}