ore untangling

apps/LoopThroughWithOpenGLCompositing/gl/RenderEngine.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#include "OpenGLRenderPass.h"
+#include "OpenGLRenderPipeline.h"
+#include "OpenGLRenderer.h"
+#include "OpenGLShaderPrograms.h"
+#include "RuntimeHost.h"
+#include "RuntimeSnapshotProvider.h"
+
+#include <windows.h>
+
+#include <functional>
+#include <string>
+#include <vector>
+
+class RenderEngine
+{
+public:
+	using RenderEffectCallback = std::function<void()>;
+	using ScreenshotCallback = std::function<void()>;
+	using PreviewPaintCallback = std::function<void()>;
+
+	RenderEngine(
+		RuntimeHost& runtimeHost,
+		RuntimeSnapshotProvider& runtimeSnapshotProvider,
+		CRITICAL_SECTION& mutex,
+		HDC hdc,
+		HGLRC hglrc,
+		RenderEffectCallback renderEffect,
+		ScreenshotCallback screenshotReady,
+		PreviewPaintCallback previewPaint);
+	~RenderEngine();
+
+	bool CompileDecodeShader(int errorMessageSize, char* errorMessage);
+	bool CompileOutputPackShader(int errorMessageSize, char* errorMessage);
+	bool InitializeResources(
+		unsigned inputFrameWidth,
+		unsigned inputFrameHeight,
+		unsigned captureTextureWidth,
+		unsigned outputFrameWidth,
+		unsigned outputFrameHeight,
+		unsigned outputPackTextureWidth,
+		std::string& error);
+	bool CompileLayerPrograms(unsigned inputFrameWidth, unsigned inputFrameHeight, int errorMessageSize, char* errorMessage);
+	bool CommitPreparedLayerPrograms(const PreparedShaderBuild& preparedBuild, unsigned inputFrameWidth, unsigned inputFrameHeight, int errorMessageSize, char* errorMessage);
+
+	const std::vector<RuntimeRenderState>& CommittedLayerStates() const;
+	void ResetTemporalHistoryState();
+	void ResetShaderFeedbackState();
+	void ResizeView(int width, int height);
+	bool TryPresentToWindow(unsigned outputFrameWidth, unsigned outputFrameHeight);
+	bool TryUploadInputFrame(const VideoIOFrame& inputFrame, const VideoIOState& videoState);
+	bool RenderOutputFrame(const RenderPipelineFrameContext& context, VideoIOOutputFrame& outputFrame);
+	void RenderLayerStack(
+		bool hasInputSource,
+		const std::vector<RuntimeRenderState>& layerStates,
+		unsigned inputFrameWidth,
+		unsigned inputFrameHeight,
+		unsigned captureTextureWidth,
+		VideoIOPixelFormat inputPixelFormat,
+		unsigned historyCap);
+	bool ReadOutputFrameRgba(unsigned width, unsigned height, std::vector<unsigned char>& bottomUpPixels);
+
+private:
+	OpenGLRenderer mRenderer;
+	OpenGLRenderPass mRenderPass;
+	OpenGLRenderPipeline mRenderPipeline;
+	OpenGLShaderPrograms mShaderPrograms;
+	CRITICAL_SECTION& mMutex;
+	HDC mHdc;
+	HGLRC mHglrc;
+};