Shader compile thread seperation

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLShaderPrograms.cpp

@@ -56,6 +56,53 @@ bool OpenGLShaderPrograms::CompileLayerPrograms(unsigned inputFrameWidth, unsign
 
 	DestroyLayerPrograms();
 	mRenderer.ReplaceLayerPrograms(newPrograms);
+	mCommittedLayerStates = layerStates;
+
+	mRuntimeHost.SetCompileStatus(true, "Shader layers compiled successfully.");
+	mRuntimeHost.ClearReloadRequest();
+
+	return true;
+}
+
+bool OpenGLShaderPrograms::CommitPreparedLayerPrograms(const PreparedShaderBuild& preparedBuild, unsigned inputFrameWidth, unsigned inputFrameHeight, int errorMessageSize, char* errorMessage)
+{
+	if (!preparedBuild.succeeded)
+	{
+		CopyErrorMessage(preparedBuild.message, errorMessageSize, errorMessage);
+		return false;
+	}
+
+	std::string temporalError;
+	const unsigned historyCap = mRuntimeHost.GetMaxTemporalHistoryFrames();
+	if (!mRenderer.TemporalHistory().ValidateTextureUnitBudget(preparedBuild.layerStates, historyCap, temporalError))
+	{
+		CopyErrorMessage(temporalError, errorMessageSize, errorMessage);
+		return false;
+	}
+	if (!mRenderer.TemporalHistory().EnsureResources(preparedBuild.layerStates, historyCap, inputFrameWidth, inputFrameHeight, temporalError))
+	{
+		CopyErrorMessage(temporalError, errorMessageSize, errorMessage);
+		return false;
+	}
+
+	std::vector<LayerProgram> newPrograms;
+	newPrograms.reserve(preparedBuild.layers.size());
+
+	for (const PreparedLayerShader& preparedLayer : preparedBuild.layers)
+	{
+		LayerProgram layerProgram;
+		if (!mCompiler.CompilePreparedLayerProgram(preparedLayer.state, preparedLayer.fragmentShaderSource, layerProgram, errorMessageSize, errorMessage))
+		{
+			for (LayerProgram& program : newPrograms)
+				DestroySingleLayerProgram(program);
+			return false;
+		}
+		newPrograms.push_back(layerProgram);
+	}
+
+	DestroyLayerPrograms();
+	mRenderer.ReplaceLayerPrograms(newPrograms);
+	mCommittedLayerStates = preparedBuild.layerStates;
 
 	mRuntimeHost.SetCompileStatus(true, "Shader layers compiled successfully.");
 	mRuntimeHost.ClearReloadRequest();