Timing and saftey pass

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp

@@ -294,13 +294,20 @@ void OpenGLComposite::renderEffect()
 	if (mUseCommittedLayerStates)
 	{
 		layerStates = mShaderPrograms->CommittedLayerStates();
+		if (mRuntimeHost)
+			mRuntimeHost->RefreshDynamicRenderStateFields(layerStates);
 	}
 	else if (mRuntimeHost)
 	{
 		if (mRuntimeHost->TryGetLayerRenderStates(mDeckLink->InputFrameWidth(), mDeckLink->InputFrameHeight(), layerStates))
+		{
 			mCachedLayerRenderStates = layerStates;
+		}
 		else
+		{
 			layerStates = mCachedLayerRenderStates;
+			mRuntimeHost->RefreshDynamicRenderStateFields(layerStates);
+		}
 	}
 	const unsigned historyCap = mRuntimeHost ? mRuntimeHost->GetMaxTemporalHistoryFrames() : 0;
 	mRenderPass->Render(

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLDeckLinkBridge.cpp

@@ -98,6 +98,8 @@ void OpenGLDeckLinkBridge::VideoFrameArrived(IDeckLinkVideoInputFrame* inputFram
 	else
 	{
 		// Use a straightforward texture buffer
+		glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+		glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 		glBindBuffer(GL_PIXEL_UNPACK_BUFFER, mRenderer.UnpinnedTextureBuffer());
 		glBufferData(GL_PIXEL_UNPACK_BUFFER, textureSize, videoPixels, GL_DYNAMIC_DRAW);
 		glBindTexture(GL_TEXTURE_2D, mRenderer.CaptureTexture());
@@ -174,13 +176,14 @@ void OpenGLDeckLinkBridge::PlayoutFrameCompleted(IDeckLinkVideoFrame* completedF
 		if (!mDeckLink.TransferPlayoutFrame(pFrame, mRenderer.OutputTexture()))
 			OutputDebugStringA("Playback: transferFrame() failed\n");
 
-		mPaint();
-
 		// Wait for transfer to system memory to complete
 		mDeckLink.WaitForPlayoutTransferComplete(pFrame);
+		mPaint();
 	}
 	else
 	{
+		glPixelStorei(GL_PACK_ALIGNMENT, 4);
+		glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 		glBindFramebuffer(GL_READ_FRAMEBUFFER, mRenderer.OutputFramebuffer());
 		glReadPixels(0, 0, mDeckLink.OutputFrameWidth(), mDeckLink.OutputFrameHeight(), GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pFrame);
 		mPaint();

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLRenderPass.cpp

@@ -23,6 +23,7 @@ void OpenGLRenderPass::Render(
 		VideoFrameTransfer::beginTextureInUse(VideoFrameTransfer::CPUtoGPU);
 	}
 
+	glDisable(GL_SCISSOR_TEST);
 	glDisable(GL_BLEND);
 	glDisable(GL_DEPTH_TEST);
 	if (hasInputSource)

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLRenderer.cpp

@@ -143,6 +143,7 @@ void OpenGLRenderer::PresentToWindow(HDC hdc, unsigned outputFrameWidth, unsigne
 
 	glBindFramebuffer(GL_READ_FRAMEBUFFER, mOutputFrameBuf);
 	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+	glDisable(GL_SCISSOR_TEST);
 	glViewport(0, 0, mViewWidth, mViewHeight);
 	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 	glClear(GL_COLOR_BUFFER_BIT);