added new layer input pass

apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLRenderPass.cpp

@@ -188,6 +188,7 @@ std::vector<RenderPassDescriptor> OpenGLRenderPass::BuildLayerPassDescriptors(
 			pass.passId = passProgram.passId;
 			pass.layerId = state.layerId;
 			pass.shaderId = state.shaderId;
+			pass.layerInputTexture = layerInputTexture;
 			pass.sourceTexture = passSourceTexture;
 			pass.sourceFramebuffer = passIndex == 0 ? layerInputFramebuffer : passSourceFramebuffer;
 			pass.destinationTexture = passDestinationTexture;
@@ -226,6 +227,7 @@ void OpenGLRenderPass::RenderLayerPass(
 		return;
 
 	RenderShaderProgram(
+		pass.layerInputTexture,
 		pass.sourceTexture,
 		pass.destinationFramebuffer,
 		*pass.passProgram,
@@ -243,6 +245,7 @@ void OpenGLRenderPass::RenderLayerPass(
 }
 
 void OpenGLRenderPass::RenderShaderProgram(
+	GLuint layerInputTexture,
 	GLuint sourceTexture,
 	GLuint destinationFrameBuffer,
 	PassProgram& passProgram,
@@ -267,7 +270,7 @@ void OpenGLRenderPass::RenderShaderProgram(
 	const std::vector<GLuint> temporalHistoryTextures = mRenderer.TemporalHistory().ResolveTemporalHistoryTextures(state, sourceTexture, state.isTemporal ? historyCap : 0);
 	const GLuint feedbackTexture = mRenderer.FeedbackBuffers().ResolveReadTexture(state);
 	const ShaderTextureBindings::RuntimeTextureBindingPlan texturePlan =
-		mTextureBindings.BuildLayerRuntimeBindingPlan(passProgram, sourceTexture, state, feedbackTexture, sourceHistoryTextures, temporalHistoryTextures);
+		mTextureBindings.BuildLayerRuntimeBindingPlan(passProgram, sourceTexture, layerInputTexture, state, feedbackTexture, sourceHistoryTextures, temporalHistoryTextures);
 	mTextureBindings.BindRuntimeTexturePlan(texturePlan);
 	glBindVertexArray(mRenderer.FullscreenVertexArray());
 	glUseProgram(passProgram.program);

apps/LoopThroughWithOpenGLCompositing/gl/pipeline/OpenGLRenderPass.h

@@ -44,6 +44,7 @@ private:
 		const TextBindingUpdater& updateTextBinding,
 		const GlobalParamsUpdater& updateGlobalParams);
 	void RenderShaderProgram(
+		GLuint layerInputTexture,
 		GLuint sourceTexture,
 		GLuint destinationFrameBuffer,
 		PassProgram& passProgram,

apps/LoopThroughWithOpenGLCompositing/gl/pipeline/RenderPassDescriptor.h

@@ -28,6 +28,7 @@ struct RenderPassDescriptor
 	std::string passId;
 	std::string layerId;
 	std::string shaderId;
+	GLuint layerInputTexture = 0;
 	GLuint sourceTexture = 0;
 	GLuint sourceFramebuffer = 0;
 	GLuint destinationTexture = 0;