1 files changed, 77 insertions, 0 deletions
diff --git a/LibOVR/Src/CAPI/CAPI_DistortionRenderer.cpp b/LibOVR/Src/CAPI/CAPI_DistortionRenderer.cpp
index 613d8fb..217310c 100644
--- a/LibOVR/Src/CAPI/CAPI_DistortionRenderer.cpp
+++ b/LibOVR/Src/CAPI/CAPI_DistortionRenderer.cpp
@@ -68,6 +68,83 @@ DistortionRenderer::CreateFunc DistortionRenderer::APICreateRegistry[ovrRenderAP
 #endif
 };
 
+void DistortionRenderer::SetLatencyTestColor(unsigned char* color)
+{
+    if(color)
+    {
+        LatencyTestDrawColor[0] = color[0];
+        LatencyTestDrawColor[1] = color[1];
+        LatencyTestDrawColor[2] = color[2];
+    }
+
+    LatencyTestActive = color != NULL;
+}
+
+void DistortionRenderer::SetLatencyTest2Color(unsigned char* color)
+{
+    if(color)
+    {
+        LatencyTest2DrawColor[0] = color[0];
+        LatencyTest2DrawColor[1] = color[1];
+        LatencyTest2DrawColor[2] = color[2];
+    }
+
+    LatencyTest2Active = color != NULL;
+}
+
+double DistortionRenderer::WaitTillTime(double absTime)
+{
+    double initialTime = ovr_GetTimeInSeconds();
+    if (initialTime >= absTime)
+        return 0.0;
+
+    double newTime = initialTime;
+    volatile int i;
+
+    while (newTime < absTime)
+    {
+// TODO: Needs further testing before enabling it on all Windows configs
+#if 0 //def OVR_OS_WIN32
+        double remainingWaitTime = absTime - newTime;
+
+        // don't yield if <2ms
+        if(remainingWaitTime > 0.002)
+        {
+            // round down wait time to closest 1 ms
+            int roundedWaitTime = (remainingWaitTime * 1000);
+
+            waitableTimerInterval.QuadPart = -10000LL; // 10000 * 100 ns = 1 ms
+            waitableTimerInterval.QuadPart *= roundedWaitTime;
+
+            SetWaitableTimer(timer, &waitableTimerInterval, 0, NULL, NULL, TRUE);
+            DWORD waitResult = WaitForSingleObject(timer, roundedWaitTime + 3);   // give 3 ms extra time
+
+            double sleptTime = ovr_GetTimeInSeconds() - newTime;
+            // Make sure this is reliable (should be waiting for 1ms, make sure it's <2ms)
+            if (sleptTime > remainingWaitTime)
+            {
+                OVR_DEBUG_LOG_TEXT(
+                    ("[DistortionRenderer::FlushGpuAndWaitTillTime] Sleep interval too long: %f\n", sleptTime));
+            }
+            else
+            {
+                OVR_ASSERT(WAIT_OBJECT_0 == waitResult);
+                OVR_UNUSED(waitResult);
+            }
+        }
+        else
+#endif
+        {
+            for (int j = 0; j < 50; j++)
+                i = 0;
+        }			
+
+        newTime = ovr_GetTimeInSeconds();
+    }
+
+    // How long we waited
+    return newTime - initialTime;
+}
 
 }} // namespace OVR::CAPI