render target pool

apps/LoopThroughWithOpenGLCompositing/gl/renderer/RenderTargetPool.h

@@ -1,9 +1,10 @@
 #pragma once
 
-#include <gl/gl.h>
+#include "GLExtensions.h"
 
 #include <array>
 #include <string>
+#include <vector>
 
 enum class RenderTargetId
 {
@@ -38,14 +39,25 @@ public:
 		GLenum pixelType,
 		const char* errorPrefix,
 		std::string& error);
+	bool ReserveTemporaryTargets(
+		std::size_t count,
+		unsigned width,
+		unsigned height,
+		GLenum internalFormat,
+		GLenum pixelFormat,
+		GLenum pixelType,
+		std::string& error);
 	void Destroy();
 
 	GLuint Texture(RenderTargetId id) const { return Target(id).texture; }
 	GLuint Framebuffer(RenderTargetId id) const { return Target(id).framebuffer; }
 	const RenderTarget& Target(RenderTargetId id) const;
+	const RenderTarget& TemporaryTarget(std::size_t index) const { return mTemporaryTargets[index]; }
+	std::size_t TemporaryTargetCount() const { return mTemporaryTargets.size(); }
 
 private:
 	static std::size_t TargetIndex(RenderTargetId id) { return static_cast<std::size_t>(id); }
 
 	std::array<RenderTarget, static_cast<std::size_t>(RenderTargetId::Count)> mTargets;
+	std::vector<RenderTarget> mTemporaryTargets;
 };