From 15740faf9fe9fe4be08965098bbf2947e096aeeb Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Wed, 14 Aug 2019 22:50:43 +0800
Subject: +Unity Runtime code

---
 Runtime/Graphics/RenderBufferManager.h | 58 ++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 Runtime/Graphics/RenderBufferManager.h

(limited to 'Runtime/Graphics/RenderBufferManager.h')

diff --git a/Runtime/Graphics/RenderBufferManager.h b/Runtime/Graphics/RenderBufferManager.h
new file mode 100644
index 0000000..5496acf
--- /dev/null
+++ b/Runtime/Graphics/RenderBufferManager.h
@@ -0,0 +1,58 @@
+#ifndef RENDERBUFFERMANAGER_H
+#define RENDERBUFFERMANAGER_H
+
+#include "Runtime/GfxDevice/GfxDeviceTypes.h"
+#include "Runtime/Utilities/MemoryPool.h"
+#include "Runtime/BaseClasses/BaseObject.h"
+
+class RenderTexture;
+
+
+/* Manager for getting temporary render buffers.
+ * Use this instead of creating RenderTextures if you need a quick buffer.
+ * This is a low-overhead class that recycles render textures.
+ */
+class RenderBufferManager
+{
+	RenderBufferManager () { m_CurrentRBMFrame = m_TempBuffers = 0; }
+
+public:
+
+	enum { kFullSize = -1 };
+	enum {
+		kRBCubemap = (1<<0),
+		kRBCreatedFromScript = (1<<1),
+		kRBSampleOnlyDepth = (1<<2),
+	};
+	enum { kKillFrames = 15 };
+
+	static void InitRenderBufferManager ();
+	static void CleanupRenderBufferManager ();
+
+	// Get a RenderTexture with the specific sizes
+	// If the width & height parameters uses autosizing, viewport size is taken from the current camera.
+	RenderTexture *GetTempBuffer (int width, int height, DepthBufferFormat depthFormat, RenderTextureFormat colorFormat, UInt32 flags, RenderTextureReadWrite colorSpace, int antiAliasing = 1);
+
+	// Release the temporary buffer.
+	void ReleaseTempBuffer (RenderTexture *rTex);	
+	
+	void GarbageCollect (int framesDelay = kKillFrames);
+	
+	void Cleanup ();
+
+private:
+	
+	typedef std::set<PPtr<RenderTexture>, std::less< PPtr<RenderTexture> > , memory_pool<PPtr<RenderTexture> > > TakenTextures;
+	typedef std::pair <int, PPtr<RenderTexture> > IntPPtrPair;
+	typedef std::list<IntPPtrPair, memory_pool<IntPPtrPair > > FreeTextures;
+
+	FreeTextures m_FreeTextures;
+	TakenTextures m_TakenTextures;
+	int m_TempBuffers;
+	int m_CurrentRBMFrame;
+};
+
+RenderBufferManager& GetRenderBufferManager ();
+RenderBufferManager* GetRenderBufferManagerPtr ();
+
+#endif
-- 
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