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Source/Engine/GraphicsDevice/OpenGL/GPUTextureViewOGL.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Graphics/GPUTextureView.h"
+#include "IncludeOpenGLHeaders.h"
+
+#if GRAPHICS_API_OPENGL
+
+#include "IShaderResourceOGL.h"
+
+class TextureOGL;
+
+/// <summary>
+/// Render target handle for OpenGL
+/// </summary>
+class GPUTextureViewOGL : public GPUTextureView, public IShaderResourceOGL
+{
+public:
+
+	/// <summary>
+	/// The OpenGL texture view target.
+	/// </summary>
+	GLuint ViewTarget;
+
+	/// <summary>
+	/// The OpenGL texture view target.
+	/// </summary>
+	GLuint ViewID;
+
+public:
+
+	GPUTextureViewOGL()
+	{
+		ViewTarget = 0;
+		ViewID = 0;
+		Texture = nullptr;
+	}
+
+	~GPUTextureViewOGL();
+
+public:
+
+	TextureOGL* Texture;
+	bool IsFullView;
+	int32 MipLevels;
+	int32 FirstArraySlice;
+	int32 NumArraySlices;
+	int32 MostDetailedMip;
+
+public:
+
+	bool IsBackbuffer() const
+	{
+		// Render output backbuffers are used as a special case for rendering in OpenGL
+		return IsFullView && Texture == nullptr;
+	}
+
+	TextureOGL* GetTexture() const
+	{
+		return Texture;
+	}
+
+	void InitAsBackbuffer(GPUResource* parent, PixelFormat format);
+
+	void InitAsFull(TextureOGL* parent);
+
+	void InitAsFull(TextureOGL* parent, PixelFormat format);
+
+	enum class ViewType
+	{
+		Texture1D,
+		Texture1D_Array,
+		Texture2D,
+		Texture2D_Array,
+		Texture3D,
+		TextureCube,
+		TextureCube_Array,
+	};
+
+	void InitAsView(TextureOGL* parent, PixelFormat format, ViewType type, int32 mipLevels, int32 firstArraySlice, int32 numArraySlices, int32 mostDetailedMipIndex = 0);
+
+	void AttachToFramebuffer(GLenum attachmentPoint);
+
+	void Release();
+
+public:
+
+	// [IShaderResourceOGL]
+	void Bind(int32 slotIndex) override;
+};
+
+#endif