/** Helper function for acquiring the appropriate FSceneViewport */
FSceneViewport* FindSceneViewport()
{
if (!GIsEditor)
{
UGameEngine* GameEngine = Cast<UGameEngine>(GEngine);
return GameEngine->SceneViewport.Get();
}
#if WITH_EDITOR
else
{
UEditorEngine* EditorEngine = Cast<UEditorEngine>(GEngine);
return (FSceneViewport*)(EditorEngine->GetPIEViewport());
}
#endif
return nullptr;
}
bool FOSVRHMD::EnableStereo(bool bStereo)
{
bool bNewSteroEnabled = IsHMDConnected() ? bStereo : false;
if (bNewSteroEnabled == bStereoEnabled)
{
return bStereoEnabled;
}
bStereoEnabled = bNewSteroEnabled;
if (bStereoEnabled)
{
StartCustomPresent();
}
else
{
StopCustomPresent();
}
if (bHmdEnabled != bStereoEnabled)
{
EnableHMD(bStereoEnabled);
}
auto leftEye = HMDDescription.GetDisplaySize(OSVRHMDDescription::LEFT_EYE);
auto rightEye = HMDDescription.GetDisplaySize(OSVRHMDDescription::RIGHT_EYE);
auto width = leftEye.X + rightEye.X;
auto height = leftEye.Y;
GetRenderTargetSize_GameThread(width, height, width, height);
// On Android, we currently use the resolution Unreal sets for us, bypassing OSVR
// We may revisit once display plugins are added to OSVR-Core.
#if !PLATFORM_ANDROID
FSystemResolution::RequestResolutionChange(width, height, EWindowMode::Windowed);
#endif
FSceneViewport* sceneViewport;
if (!GIsEditor)
{
//UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR getting UGameEngine::SceneViewport viewport"));
UGameEngine* gameEngine = Cast<UGameEngine>(GEngine);
sceneViewport = gameEngine->SceneViewport.Get();
}
#if WITH_EDITOR
else
{
//UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR getting editor viewport"));
UEditorEngine* editorEngine = CastChecked<UEditorEngine>(GEngine);
sceneViewport = (FSceneViewport*)editorEngine->GetPIEViewport();
if (sceneViewport == nullptr || !sceneViewport->IsStereoRenderingAllowed())
{
sceneViewport = (FSceneViewport*)editorEngine->GetActiveViewport();
if (sceneViewport != nullptr && !sceneViewport->IsStereoRenderingAllowed())
{
sceneViewport = nullptr;
}
}
}
#endif
if (!sceneViewport)
{
UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR scene viewport does not exist"));
return false;
}
else
{
//UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR scene viewport exists"));
#if !WITH_EDITOR
auto window = sceneViewport->FindWindow();
#endif
if (bStereo)
{
//UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR bStereo was true"));
// the render targets may be larger or smaller than the display resolution
// due to renderOverfillFactor and renderOversampleFactor settings
// The viewports should match the render target size not the display size
//if (mCustomPresent)
//{
//uint32 iWidth, iHeight;
//mCustomPresent->CalculateRenderTargetSize(iWidth, iHeight);
//float screenScale = GetScreenScale();
//width = float(iWidth) * (1.0f / screenScale);
//height = float(iHeight) * (1.0f / screenScale);
//}
//else
//{
// temporary workaround. The above code doesn't work because when the game
// is packaged, mCustomPresent is not initialized before this call. In the editor, it is.
// calling CalculateRenderTargetSize when mCustomPresent isn't initialized
// results in Initialize being called, which has to be done on the render thread.
// The proper fix is to move the render target size API from render manager to OSVR-Core
// so we don't need a graphics context to calculate them. In the meantime, we'll
// implement this temporary workaround (parse the renderManagerConfig manually and
// calculate the render target sizes ourselves).
//}
//UE_LOG(OSVRHMDLog, Warning, TEXT("OSVR Actually set viewport size"));
sceneViewport->SetViewportSize(width, height);
#if !WITH_EDITOR
if (window.IsValid())
{
window->SetViewportSizeDrivenByWindow(false);
}
#endif
}
#if !WITH_EDITOR
else
{
if (window.IsValid())
{
auto size = sceneViewport->FindWindow()->GetSizeInScreen();
sceneViewport->SetViewportSize(size.X, size.Y);
window->SetViewportSizeDrivenByWindow(true);
}
}
#endif
}
GEngine->bForceDisableFrameRateSmoothing = bStereo;
return bStereoEnabled;
}