/**
* This is more of a temporary workaround to an issue with getting the render target
* size from the RenderManager. On the game thread, we can't get the render target sizes
* unless we have already initialized the render manager, which we can only do on the render
* thread. In the future, we'll move those RenderManager APIs to OSVR-Core so we can call
* them from any thread with access to the client context.
*/
static void GetRenderTargetSize_GameThread(float windowWidth, float windowHeight, float &width, float &height)
{
auto clientContext = IOSVR::Get().GetEntryPoint()->GetClientContext();
size_t length;
osvrClientGetStringParameterLength(clientContext, "/renderManagerConfig", &length);
if (length > 0)
{
char* renderManagerConfigStr = new char[length];
osvrClientGetStringParameter(clientContext, "/renderManagerConfig", renderManagerConfigStr, length);
auto reader = TJsonReaderFactory<>::Create(renderManagerConfigStr);
TSharedPtr<FJsonObject> jsonObject;
if (FJsonSerializer::Deserialize(reader, jsonObject))
{
auto subObj = jsonObject->GetObjectField("renderManagerConfig");
double renderOverfillFactor = subObj->GetNumberField("renderOverfillFactor");
double renderOversampleFactor = subObj->GetNumberField("renderOversampleFactor");
width = windowWidth * renderOverfillFactor * renderOversampleFactor;
height = windowHeight * renderOverfillFactor * renderOversampleFactor;
}
delete[] renderManagerConfigStr;
}
else
{
width = windowWidth;
height = windowHeight;
}
}
bool OSVRHMDDescription::Init(OSVR_ClientContext OSVRClientContext)
{
Valid = false;
static const char* Path = "/display";
#if OSVR_ENABLED
size_t Length;
if (osvrClientGetStringParameterLength(OSVRClientContext, Path, &Length) == OSVR_RETURN_FAILURE)
return false;
FMemMark MemStackMark(FMemStack::Get());
char* Buffer = new (FMemStack::Get()) char[Length];
if (osvrClientGetStringParameter(OSVRClientContext, Path, Buffer, Length) == OSVR_RETURN_FAILURE)
return false;
Valid = GetData(Data).InitFromJSON(Buffer);
#endif // OSVR_ENABLED
return Valid;
}
