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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | #region License/* FNA - XNA4 Reimplementation for Desktop Platforms * Copyright 2009-2016 Ethan Lee and the MonoGame Team * * Released under the Microsoft Public License. * See LICENSE for details. *//* Derived from code by the Mono.Xna Team (Copyright 2006). * Released under the MIT License. See monoxna.LICENSE for details. */#endregion#region Using Statementsusing System;using Microsoft.Xna.Framework.Graphics;#endregionnamespace Microsoft.Xna.Framework.Content{ internal class Texture2DReader : ContentTypeReader<Texture2D> { #region Private Supported File Extensions Variable private static string[] supportedExtensions = new string[] { ".bmp", ".gif", ".jpg", ".jpeg", ".png", ".tga", ".tif", ".tiff" }; #endregion #region Internal Constructor internal Texture2DReader() { } #endregion #region Internal Filename Normalizer Method internal static string Normalize(string fileName) { return Normalize(fileName, supportedExtensions); } #endregion #region Protected Read Method protected internal override Texture2D Read( ContentReader reader, Texture2D existingInstance ) { Texture2D texture = null; SurfaceFormat surfaceFormat; if (reader.version < 5) { /* These integer values are based on the enum values * from previous XNA versions. * -flibit */ int legacyFormat = reader.ReadInt32(); if (legacyFormat == 1) { surfaceFormat = SurfaceFormat.Color; } if (legacyFormat == 28) { surfaceFormat = SurfaceFormat.Dxt1; } else if (legacyFormat == 30) { surfaceFormat = SurfaceFormat.Dxt3; } else if (legacyFormat == 32) { surfaceFormat = SurfaceFormat.Dxt5; } else { throw new NotSupportedException( "Unsupported legacy surface format." ); } } else { surfaceFormat = (SurfaceFormat) reader.ReadInt32(); } int width = reader.ReadInt32(); int height = reader.ReadInt32(); int levelCount = reader.ReadInt32(); int levelCountOutput = levelCount; // Check to see if we need to convert the surface data SurfaceFormat convertedFormat = surfaceFormat; if ( surfaceFormat == SurfaceFormat.Dxt1 && !reader.GraphicsDevice.GLDevice.SupportsDxt1 ) { convertedFormat = SurfaceFormat.Color; } else if ( ( surfaceFormat == SurfaceFormat.Dxt3 || surfaceFormat == SurfaceFormat.Dxt5 ) && !reader.GraphicsDevice.GLDevice.SupportsS3tc ) { convertedFormat = SurfaceFormat.Color; } // Check for duplicate instances if (existingInstance == null) { texture = new Texture2D( reader.GraphicsDevice, width, height, levelCountOutput > 1, convertedFormat ); } else { texture = existingInstance; } for (int level = 0; level < levelCount; level += 1) { int levelDataSizeInBytes = reader.ReadInt32(); byte[] levelData = null; // Don't assign this quite yet... int levelWidth = width >> level; int levelHeight = height >> level; if (level >= levelCountOutput) { continue; } // Convert the image data if required if ( surfaceFormat == SurfaceFormat.Dxt1 && !reader.GraphicsDevice.GLDevice.SupportsDxt1 ) { levelData = reader.ReadBytes(levelDataSizeInBytes); levelData = DxtUtil.DecompressDxt1( levelData, levelWidth, levelHeight ); } else if ( surfaceFormat == SurfaceFormat.Dxt3 && !reader.GraphicsDevice.GLDevice.SupportsS3tc ) { levelData = reader.ReadBytes(levelDataSizeInBytes); levelData = DxtUtil.DecompressDxt3( levelData, levelWidth, levelHeight ); } else if ( surfaceFormat == SurfaceFormat.Dxt5 && !reader.GraphicsDevice.GLDevice.SupportsS3tc ) { levelData = reader.ReadBytes(levelDataSizeInBytes); levelData = DxtUtil.DecompressDxt5( levelData, levelWidth, levelHeight ); } if ( levelData == null && reader.BaseStream.GetType() != typeof(System.IO.MemoryStream) ) { /* If the ContentReader is not backed by a * MemoryStream, we have to read the data in. */ levelData = reader.ReadBytes(levelDataSizeInBytes); } if (levelData != null) { /* If we had to convert the data, or get the data from a * non-MemoryStream, we set the data with our levelData * reference. */ texture.SetData(level, null, levelData, 0, levelData.Length); } else { /* Ideally, we didn't have to perform any conversion or * unnecessary reading. Just throw the buffer directly * into SetData, skipping a redundant byte[] copy. */ texture.SetData<byte>( level, null, (((System.IO.MemoryStream) (reader.BaseStream)).GetBuffer()), (int) reader.BaseStream.Position, levelDataSizeInBytes ); reader.BaseStream.Seek( levelDataSizeInBytes, System.IO.SeekOrigin.Current ); } } return texture; } #endregion }} |
