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Source/Engine/Graphics/Textures/TextureUtils.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Types/BaseTypes.h"
+#include "Types.h"
+
+/// <summary>
+/// Texture utilities class
+/// </summary>
+class TextureUtils
+{
+public:
+
+    static PixelFormat ToPixelFormat(const TextureFormatType format, int32 width, int32 height, bool canCompress)
+    {
+        const bool canUseBlockCompression = width % 4 == 0 && height % 4 == 0;
+        if (canCompress && canUseBlockCompression)
+        {
+            switch (format)
+            {
+            case TextureFormatType::ColorRGB:
+                return PixelFormat::BC1_UNorm;
+            case TextureFormatType::ColorRGBA:
+                return PixelFormat::BC3_UNorm;
+            case TextureFormatType::NormalMap:
+                return PixelFormat::BC5_UNorm;
+            case TextureFormatType::GrayScale:
+                return PixelFormat::BC4_UNorm;
+            case TextureFormatType::HdrRGBA:
+                return PixelFormat::BC7_UNorm;
+            case TextureFormatType::HdrRGB:
+                return PixelFormat::BC6H_Uf16;
+            default:
+                return PixelFormat::Unknown;
+            }
+        }
+
+        switch (format)
+        {
+        case TextureFormatType::ColorRGB:
+            return PixelFormat::R8G8B8A8_UNorm;
+        case TextureFormatType::ColorRGBA:
+            return PixelFormat::R8G8B8A8_UNorm;
+        case TextureFormatType::NormalMap:
+            return PixelFormat::R16G16_UNorm;
+        case TextureFormatType::GrayScale:
+            return PixelFormat::R8_UNorm;
+        case TextureFormatType::HdrRGBA:
+            return PixelFormat::R16G16B16A16_Float;
+        case TextureFormatType::HdrRGB:
+            return PixelFormat::R11G11B10_Float;
+        default:
+            return PixelFormat::Unknown;
+        }
+    }
+};