174 lines
8.3 KiB
C#
174 lines
8.3 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine.Assertions;
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namespace UnityEngine.Rendering.PostProcessing
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{
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// Temporary code dump until the texture format refactor goes into trunk...
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/// <summary>
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/// A set of utilities to deal with texture formats.
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/// </summary>
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public static class TextureFormatUtilities
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{
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static Dictionary<int, RenderTextureFormat> s_FormatAliasMap;
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static Dictionary<int, bool> s_SupportedRenderTextureFormats;
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static Dictionary<int, bool> s_SupportedTextureFormats;
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static TextureFormatUtilities()
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{
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s_FormatAliasMap = new Dictionary<int, RenderTextureFormat>
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{
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{ (int)TextureFormat.Alpha8, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ARGB4444, RenderTextureFormat.ARGB4444 },
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{ (int)TextureFormat.RGB24, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.RGBA32, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ARGB32, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.RGB565, RenderTextureFormat.RGB565 },
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{ (int)TextureFormat.R16, RenderTextureFormat.RHalf },
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{ (int)TextureFormat.DXT1, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.DXT5, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.RGBA4444, RenderTextureFormat.ARGB4444 },
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{ (int)TextureFormat.BGRA32, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.RHalf, RenderTextureFormat.RHalf },
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{ (int)TextureFormat.RGHalf, RenderTextureFormat.RGHalf },
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{ (int)TextureFormat.RGBAHalf, RenderTextureFormat.ARGBHalf },
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{ (int)TextureFormat.RFloat, RenderTextureFormat.RFloat },
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{ (int)TextureFormat.RGFloat, RenderTextureFormat.RGFloat },
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{ (int)TextureFormat.RGBAFloat, RenderTextureFormat.ARGBFloat },
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{ (int)TextureFormat.RGB9e5Float, RenderTextureFormat.ARGBHalf },
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{ (int)TextureFormat.BC4, RenderTextureFormat.R8 },
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{ (int)TextureFormat.BC5, RenderTextureFormat.RGHalf },
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{ (int)TextureFormat.BC6H, RenderTextureFormat.ARGBHalf },
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{ (int)TextureFormat.BC7, RenderTextureFormat.ARGB32 },
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#if !UNITY_IOS && !UNITY_TVOS
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{ (int)TextureFormat.DXT1Crunched, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.DXT5Crunched, RenderTextureFormat.ARGB32 },
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#endif
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{ (int)TextureFormat.PVRTC_RGB2, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.PVRTC_RGBA2, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.PVRTC_RGB4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.PVRTC_RGBA4, RenderTextureFormat.ARGB32 },
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#if !UNITY_2018_1_OR_NEWER
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{ (int)TextureFormat.ATC_RGB4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ATC_RGBA8, RenderTextureFormat.ARGB32 },
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#endif
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{ (int)TextureFormat.ETC_RGB4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ETC2_RGB, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ETC2_RGBA1, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ETC2_RGBA8, RenderTextureFormat.ARGB32 },
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#if UNITY_2019_1_OR_NEWER
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{ (int)TextureFormat.ASTC_4x4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_5x5, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_6x6, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_8x8, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_10x10, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_12x12, RenderTextureFormat.ARGB32 },
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#else
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{ (int)TextureFormat.ASTC_RGB_4x4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGB_5x5, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGB_6x6, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGB_8x8, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGB_10x10, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGB_12x12, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_4x4, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_5x5, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_6x6, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_8x8, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_10x10, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ASTC_RGBA_12x12, RenderTextureFormat.ARGB32 },
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#endif
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#if !UNITY_2018_3_OR_NEWER
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{ (int)TextureFormat.ETC_RGB4_3DS, RenderTextureFormat.ARGB32 },
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{ (int)TextureFormat.ETC_RGBA8_3DS, RenderTextureFormat.ARGB32 }
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#endif
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};
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// TODO: refactor the next two scopes in a generic function once we have support for enum constraints on generics
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// In 2018.1 SystemInfo.SupportsRenderTextureFormat() generates garbage so we need to
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// cache its calls to avoid that...
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{
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s_SupportedRenderTextureFormats = new Dictionary<int, bool>();
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var values = Enum.GetValues(typeof(RenderTextureFormat));
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foreach (var format in values)
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{
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if ((int)format < 0) // Safe guard, negative values are deprecated stuff
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continue;
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if (IsObsolete(format))
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continue;
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bool supported = SystemInfo.SupportsRenderTextureFormat((RenderTextureFormat)format);
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s_SupportedRenderTextureFormats[(int)format] = supported;
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}
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}
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// Same for TextureFormat
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{
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s_SupportedTextureFormats = new Dictionary<int, bool>();
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var values = Enum.GetValues(typeof(TextureFormat));
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foreach (var format in values)
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{
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if ((int)format < 0) // Crashes the runtime otherwise (!)
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continue;
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if (IsObsolete(format))
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continue;
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bool supported = SystemInfo.SupportsTextureFormat((TextureFormat)format);
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s_SupportedTextureFormats[(int)format] = supported;
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}
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}
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}
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static bool IsObsolete(object value)
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{
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var fieldInfo = value.GetType().GetField(value.ToString());
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var attributes = (ObsoleteAttribute[])fieldInfo.GetCustomAttributes(typeof(ObsoleteAttribute), false);
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return attributes != null && attributes.Length > 0;
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}
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/// <summary>
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/// Returns a <see cref="RenderTextureFormat"/> compatible with the given texture's format.
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/// </summary>
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/// <param name="texture">A texture to get a compatible format from</param>
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/// <returns>A compatible render texture format</returns>
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public static RenderTextureFormat GetUncompressedRenderTextureFormat(Texture texture)
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{
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Assert.IsNotNull(texture);
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if (texture is RenderTexture)
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return (texture as RenderTexture).format;
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if (texture is Texture2D)
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{
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var inFormat = ((Texture2D)texture).format;
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RenderTextureFormat outFormat;
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if (!s_FormatAliasMap.TryGetValue((int)inFormat, out outFormat))
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throw new NotSupportedException("Texture format not supported");
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return outFormat;
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}
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return RenderTextureFormat.Default;
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}
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internal static bool IsSupported(this RenderTextureFormat format)
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{
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bool supported;
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s_SupportedRenderTextureFormats.TryGetValue((int)format, out supported);
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return supported;
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}
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internal static bool IsSupported(this TextureFormat format)
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{
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bool supported;
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s_SupportedTextureFormats.TryGetValue((int)format, out supported);
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return supported;
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}
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}
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}
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