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712 lines
38 KiB
C#
712 lines
38 KiB
C#
#region --- License ---
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/* Licensed under the MIT/X11 license.
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* Copyright (c) 2006-2008 the OpenTK Team.
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* This notice may not be removed from any source distribution.
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* See license.txt for licensing details.
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*/
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#endregion
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// #define READALL
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// uncomment so ALL fields read from file are interpreted and filled. Necessary to implement uncompressed DDS
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// TODO: Find app that can build compressed dds cubemaps and verify that the import code works.
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using System;
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using System.IO;
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using System.Diagnostics;
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using OpenTK;
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using OpenTK.Graphics;
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using OpenTK.Graphics.OpenGL;
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namespace Examples.TextureLoaders
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{
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/// <summary>
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/// Expects the presence of a valid OpenGL Context and Texture Compression Extensions (GL 1.5) and Cube Maps (GL 1.3).
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/// You will get what you give. No automatic Mipmap generation or automatic compression is done. (both bad quality)
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/// Textures are never rescaled or checked if Power of 2, but you should make the Width and Height a multiple of 4 because DXTn uses 4x4 blocks.
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/// (Image displays correctly but runs extremely slow with non-power-of-two Textures on FX5600, Cache misses?)
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/// CubeMap support is experimental and the file must specify all 6 faces to work at all.
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/// </summary>
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static class ImageDDS
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{
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#region Constants
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private const byte HeaderSizeInBytes = 128; // all non-image data together is 128 Bytes
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private const uint BitMask = 0x00000007; // bits = 00 00 01 11
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private static NotImplementedException Unfinished = new NotImplementedException( "ERROR: Only 2 Dimensional DXT1/3/5 compressed images for now. 1D/3D Textures may not be compressed according to spec." );
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#endregion Constants
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#region Simplified In-Memory representation of the Image
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private static bool _IsCompressed;
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private static int _Width, _Height, _Depth, _MipMapCount;
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private static int _BytesForMainSurface; // must be handled with care when implementing uncompressed formats!
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private static byte _BytesPerBlock;
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private static PixelInternalFormat _PixelInternalFormat;
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#endregion Simplified In-Memory representation of the Image
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#region Flag Enums
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[Flags] // Surface Description
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private enum eDDSD: uint
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{
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CAPS = 0x00000001, // is always present
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HEIGHT = 0x00000002, // is always present
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WIDTH = 0x00000004, // is always present
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PITCH = 0x00000008, // is set if the image is uncompressed
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PIXELFORMAT = 0x00001000, // is always present
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MIPMAPCOUNT = 0x00020000, // is set if the image contains MipMaps
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LINEARSIZE = 0x00080000, // is set if the image is compressed
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DEPTH = 0x00800000 // is set for 3D Volume Textures
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}
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[Flags] // Pixelformat
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private enum eDDPF: uint
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{
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NONE = 0x00000000, // not part of DX, added for convenience
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ALPHAPIXELS = 0x00000001,
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FOURCC = 0x00000004,
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RGB = 0x00000040,
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RGBA = 0x00000041
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}
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/// <summary>This list was derived from nVidia OpenGL SDK</summary>
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[Flags] // Texture types
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private enum eFOURCC: uint
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{
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UNKNOWN = 0,
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#if READALL
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R8G8B8 = 20,
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A8R8G8B8 = 21,
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X8R8G8B8 = 22,
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R5G6B5 = 23,
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X1R5G5B5 = 24,
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A1R5G5B5 = 25,
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A4R4G4B4 = 26,
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R3G3B2 = 27,
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A8 = 28,
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A8R3G3B2 = 29,
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X4R4G4B4 = 30,
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A2B10G10R10 = 31,
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A8B8G8R8 = 32,
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X8B8G8R8 = 33,
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G16R16 = 34,
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A2R10G10B10 = 35,
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A16B16G16R16 = 36,
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L8 = 50,
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A8L8 = 51,
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A4L4 = 52,
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D16_LOCKABLE = 70,
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D32 = 71,
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D24X8 = 77,
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D16 = 80,
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D32F_LOCKABLE = 82,
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L16 = 81,
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// s10e5 formats (16-bits per channel)
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R16F = 111,
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G16R16F = 112,
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A16B16G16R16F = 113,
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// IEEE s23e8 formats (32-bits per channel)
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R32F = 114,
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G32R32F = 115,
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A32B32G32R32F = 116
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#endif
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DXT1 = 0x31545844,
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DXT2 = 0x32545844,
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DXT3 = 0x33545844,
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DXT4 = 0x34545844,
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DXT5 = 0x35545844,
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}
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[Flags] // dwCaps1
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private enum eDDSCAPS: uint
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{
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NONE = 0x00000000, // not part of DX, added for convenience
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COMPLEX = 0x00000008, // should be set for any DDS file with more than one main surface
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TEXTURE = 0x00001000, // should always be set
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MIPMAP = 0x00400000 // only for files with MipMaps
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}
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[Flags] // dwCaps2
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private enum eDDSCAPS2: uint
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{
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NONE = 0x00000000, // not part of DX, added for convenience
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CUBEMAP = 0x00000200,
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CUBEMAP_POSITIVEX = 0x00000400,
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CUBEMAP_NEGATIVEX = 0x00000800,
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CUBEMAP_POSITIVEY = 0x00001000,
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CUBEMAP_NEGATIVEY = 0x00002000,
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CUBEMAP_POSITIVEZ = 0x00004000,
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CUBEMAP_NEGATIVEZ = 0x00008000,
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CUBEMAP_ALL_FACES = 0x0000FC00,
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VOLUME = 0x00200000 // for 3D Textures
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}
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#endregion Flag Enums
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#region Private Members
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private static string idString; // 4 bytes, must be "DDS "
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private static UInt32 dwSize; // Size of structure is 124 bytes, 128 including all sub-structs and the header
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private static UInt32 dwFlags; // Flags to indicate valid fields.
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private static UInt32 dwHeight; // Height of the main image in pixels
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private static UInt32 dwWidth; // Width of the main image in pixels
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private static UInt32 dwPitchOrLinearSize; // For compressed formats, this is the total number of bytes for the main image.
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private static UInt32 dwDepth; // For volume textures, this is the depth of the volume.
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private static UInt32 dwMipMapCount; // total number of levels in the mipmap chain of the main image.
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#if READALL
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private static UInt32[] dwReserved1; // 11 UInt32s
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#endif
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// Pixelformat sub-struct, 32 bytes
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private static UInt32 pfSize; // Size of Pixelformat structure. This member must be set to 32.
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private static UInt32 pfFlags; // Flags to indicate valid fields.
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private static UInt32 pfFourCC; // This is the four-character code for compressed formats.
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#if READALL
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private static UInt32 pfRGBBitCount; // For RGB formats, this is the total number of bits in the format. dwFlags should include DDpf_RGB in this case. This value is usually 16, 24, or 32. For A8R8G8B8, this value would be 32.
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private static UInt32 pfRBitMask; // For RGB formats, these three fields contain the masks for the red, green, and blue channels. For A8R8G8B8, these values would be 0x00ff0000, 0x0000ff00, and 0x000000ff respectively.
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private static UInt32 pfGBitMask; // ..
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private static UInt32 pfBBitMask; // ..
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private static UInt32 pfABitMask; // For RGB formats, this contains the mask for the alpha channel, if any. dwFlags should include DDpf_ALPHAPIXELS in this case. For A8R8G8B8, this value would be 0xff000000.
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#endif
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// Capabilities sub-struct, 16 bytes
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private static UInt32 dwCaps1; // always includes DDSCAPS_TEXTURE. with more than one main surface DDSCAPS_COMPLEX should also be set.
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private static UInt32 dwCaps2; // For cubic environment maps, DDSCAPS2_CUBEMAP should be included as well as one or more faces of the map (DDSCAPS2_CUBEMAP_POSITIVEX, DDSCAPS2_CUBEMAP_NEGATIVEX, DDSCAPS2_CUBEMAP_POSITIVEY, DDSCAPS2_CUBEMAP_NEGATIVEY, DDSCAPS2_CUBEMAP_POSITIVEZ, DDSCAPS2_CUBEMAP_NEGATIVEZ). For volume textures, DDSCAPS2_VOLUME should be included.
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#if READALL
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private static UInt32[] dwReserved2; // 3 = 2 + 1 UInt32
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#endif
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#endregion Private Members
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/// <summary>
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/// This function will generate, bind and fill a Texture Object with a DXT1/3/5 compressed Texture in .dds Format.
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/// MipMaps below 4x4 Pixel Size are discarded, because DXTn's smallest unit is a 4x4 block of Pixel data.
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/// It will set correct MipMap parameters, Filtering, Wrapping and EnvMode for the Texture.
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/// The only call inside this function affecting OpenGL State is GL.BindTexture();
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/// </summary>
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/// <param name="filename">The name of the file you wish to load, including path and file extension.</param>
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/// <param name="texturehandle">0 if invalid, otherwise a Texture Object usable with GL.BindTexture().</param>
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/// <param name="dimension">0 if invalid, will output what was loaded (typically Texture1D/2D/3D or Cubemap)</param>
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public static void LoadFromDisk( string filename, out uint texturehandle, out TextureTarget dimension )
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{
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#region Prep data
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// invalidate whatever it was before
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dimension = (TextureTarget) 0;
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texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
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ErrorCode GLError = ErrorCode.NoError;
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_IsCompressed = false;
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_Width = 0;
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_Height = 0;
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_Depth = 0;
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_MipMapCount = 0;
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_BytesForMainSurface = 0;
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_BytesPerBlock = 0;
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_PixelInternalFormat = PixelInternalFormat.Rgba8;
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byte[] _RawDataFromFile;
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#endregion
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#region Try
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try // Exceptions will be thrown if any Problem occurs while working on the file.
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{
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_RawDataFromFile = File.ReadAllBytes( @filename );
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#region Translate Header to less cryptic representation
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ConvertDX9Header( ref _RawDataFromFile ); // The first 128 Bytes of the file is non-image data
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// start by checking if all forced flags are present. Flags indicate valid fields, but aren't written by every tool .....
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if ( idString != "DDS " || // magic key
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dwSize != 124 || // constant size of struct, never reused
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pfSize != 32 || // constant size of struct, never reused
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!CheckFlag( dwFlags, (uint) eDDSD.CAPS ) || // must know it's caps
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!CheckFlag( dwFlags, (uint) eDDSD.PIXELFORMAT ) || // must know it's format
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!CheckFlag( dwCaps1, (uint) eDDSCAPS.TEXTURE ) // must be a Texture
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)
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throw new ArgumentException( "ERROR: File has invalid signature or missing Flags." );
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#region Examine Flags
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if ( CheckFlag( dwFlags, (uint) eDDSD.WIDTH ) )
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_Width = (int) dwWidth;
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else
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throw new ArgumentException( "ERROR: Flag for Width not set." );
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if ( CheckFlag( dwFlags, (uint) eDDSD.HEIGHT ) )
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_Height = (int) dwHeight;
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else
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throw new ArgumentException( "ERROR: Flag for Height not set." );
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if ( CheckFlag( dwFlags, (uint) eDDSD.DEPTH ) && CheckFlag( dwCaps2, (uint) eDDSCAPS2.VOLUME ) )
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{
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dimension = TextureTarget.Texture3D; // image is 3D Volume
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_Depth = (int) dwDepth;
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throw Unfinished;
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} else
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{// image is 2D or Cube
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if ( CheckFlag( dwCaps2, (uint) eDDSCAPS2.CUBEMAP ) )
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{
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dimension = TextureTarget.TextureCubeMap;
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_Depth = 6;
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} else
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{
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dimension = TextureTarget.Texture2D;
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_Depth = 1;
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}
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}
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// these flags must be set for mipmaps to be included
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if ( CheckFlag( dwCaps1, (uint) eDDSCAPS.MIPMAP ) && CheckFlag( dwFlags, (uint) eDDSD.MIPMAPCOUNT ) )
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_MipMapCount = (int) dwMipMapCount; // image contains MipMaps
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else
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_MipMapCount = 1; // only 1 main image
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// Should never happen
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if ( CheckFlag( dwFlags, (uint) eDDSD.PITCH ) && CheckFlag( dwFlags, (uint) eDDSD.LINEARSIZE ) )
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throw new ArgumentException( "INVALID: Pitch AND Linear Flags both set. Image cannot be uncompressed and DTXn compressed at the same time." );
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// This flag is set if format is uncompressed RGB RGBA etc.
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if ( CheckFlag( dwFlags, (uint) eDDSD.PITCH ) )
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{
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// _BytesForMainSurface = (int) dwPitchOrLinearSize; // holds bytes-per-scanline for uncompressed
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_IsCompressed = false;
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throw Unfinished;
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}
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// This flag is set if format is compressed DXTn.
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if ( CheckFlag( dwFlags, (uint) eDDSD.LINEARSIZE ) )
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{
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_BytesForMainSurface = (int) dwPitchOrLinearSize;
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_IsCompressed = true;
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}
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#endregion Examine Flags
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#region Examine Pixel Format, anything but DXTn will fail atm.
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if ( CheckFlag( pfFlags, (uint) eDDPF.FOURCC ) )
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switch ( (eFOURCC) pfFourCC )
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{
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case eFOURCC.DXT1:
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_PixelInternalFormat = (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbS3tcDxt1Ext;
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_BytesPerBlock = 8;
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_IsCompressed = true;
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break;
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//case eFOURCC.DXT2:
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case eFOURCC.DXT3:
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_PixelInternalFormat = (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbaS3tcDxt3Ext;
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_BytesPerBlock = 16;
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_IsCompressed = true;
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break;
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//case eFOURCC.DXT4:
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case eFOURCC.DXT5:
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_PixelInternalFormat = (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbaS3tcDxt5Ext;
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_BytesPerBlock = 16;
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_IsCompressed = true;
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break;
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default:
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throw Unfinished; // handle uncompressed formats
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} else
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throw Unfinished;
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// pf*Bitmasks should be examined here
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#endregion
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// Works, but commented out because some texture authoring tools don't set this flag.
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/* Safety Check, if file is only 1x 2D surface without mipmaps, eDDSCAPS.COMPLEX should not be set
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if ( CheckFlag( dwCaps1, (uint) eDDSCAPS.COMPLEX ) )
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{
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if ( result == eTextureDimension.Texture2D && _MipMapCount == 1 ) // catch potential problem
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Trace.WriteLine( "Warning: Image is declared complex, but contains only 1 surface." );
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}*/
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if ( TextureLoaderParameters.Verbose )
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Trace.WriteLine( "\n" + GetDescriptionFromMemory( filename, dimension ) );
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#endregion Translate Header to less cryptic representation
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#region send the Texture to GL
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#region Generate and Bind Handle
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GL.GenTextures( 1, out texturehandle );
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GL.BindTexture( dimension, texturehandle );
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#endregion Generate and Bind Handle
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int Cursor = HeaderSizeInBytes;
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// foreach face in the cubemap, get all it's mipmaps levels. Only one iteration for Texture2D
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for ( int Slices = 0 ; Slices < _Depth ; Slices++ )
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{
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int trueMipMapCount = _MipMapCount - 1; // TODO: triplecheck correctness
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int Width = _Width;
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int Height = _Height;
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for ( int Level = 0 ; Level < _MipMapCount ; Level++ ) // start at base image
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{
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#region determine Dimensions
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int BlocksPerRow = ( Width + 3 ) >> 2;
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int BlocksPerColumn = ( Height + 3 ) >> 2;
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int SurfaceBlockCount = BlocksPerRow * BlocksPerColumn; // // DXTn stores Texels in 4x4 blocks, a Color block is 8 Bytes, an Alpha block is 8 Bytes for DXT3/5
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int SurfaceSizeInBytes = SurfaceBlockCount * _BytesPerBlock;
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// this check must evaluate to false for 2D and Cube maps, or it's impossible to determine MipMap sizes.
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if ( TextureLoaderParameters.Verbose && Level == 0 && _IsCompressed && _BytesForMainSurface != SurfaceSizeInBytes )
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Trace.WriteLine( "Warning: Calculated byte-count of main image differs from what was read from file." );
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#endregion determine Dimensions
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// skip mipmaps smaller than a 4x4 Pixels block, which is the smallest DXTn unit.
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if ( Width > 2 && Height > 2 )
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{ // Note: there could be a potential problem with non-power-of-two cube maps
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#region Prepare Array for TexImage
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byte[] RawDataOfSurface = new byte[SurfaceSizeInBytes];
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if ( !TextureLoaderParameters.FlipImages )
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{ // no changes to the image, copy as is
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Array.Copy( _RawDataFromFile, Cursor, RawDataOfSurface, 0, SurfaceSizeInBytes );
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} else
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{ // Turn the blocks upside down and the rows aswell, done in a single pass through all blocks
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for ( int sourceColumn = 0 ; sourceColumn < BlocksPerColumn ; sourceColumn++ )
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{
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int targetColumn = BlocksPerColumn - sourceColumn - 1;
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for ( int row = 0 ; row < BlocksPerRow ; row++ )
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{
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int target = ( targetColumn * BlocksPerRow + row ) * _BytesPerBlock;
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int source = ( sourceColumn * BlocksPerRow + row ) * _BytesPerBlock + Cursor;
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#region Swap Bytes
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switch ( _PixelInternalFormat )
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{
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case (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbS3tcDxt1Ext:
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// Color only
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RawDataOfSurface[target + 0] = _RawDataFromFile[source + 0];
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RawDataOfSurface[target + 1] = _RawDataFromFile[source + 1];
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RawDataOfSurface[target + 2] = _RawDataFromFile[source + 2];
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RawDataOfSurface[target + 3] = _RawDataFromFile[source + 3];
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RawDataOfSurface[target + 4] = _RawDataFromFile[source + 7];
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RawDataOfSurface[target + 5] = _RawDataFromFile[source + 6];
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RawDataOfSurface[target + 6] = _RawDataFromFile[source + 5];
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RawDataOfSurface[target + 7] = _RawDataFromFile[source + 4];
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break;
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case (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbaS3tcDxt3Ext:
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// Alpha
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RawDataOfSurface[target + 0] = _RawDataFromFile[source + 6];
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RawDataOfSurface[target + 1] = _RawDataFromFile[source + 7];
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RawDataOfSurface[target + 2] = _RawDataFromFile[source + 4];
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RawDataOfSurface[target + 3] = _RawDataFromFile[source + 5];
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RawDataOfSurface[target + 4] = _RawDataFromFile[source + 2];
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RawDataOfSurface[target + 5] = _RawDataFromFile[source + 3];
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RawDataOfSurface[target + 6] = _RawDataFromFile[source + 0];
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RawDataOfSurface[target + 7] = _RawDataFromFile[source + 1];
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// Color
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RawDataOfSurface[target + 8] = _RawDataFromFile[source + 8];
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RawDataOfSurface[target + 9] = _RawDataFromFile[source + 9];
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RawDataOfSurface[target + 10] = _RawDataFromFile[source + 10];
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RawDataOfSurface[target + 11] = _RawDataFromFile[source + 11];
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RawDataOfSurface[target + 12] = _RawDataFromFile[source + 15];
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RawDataOfSurface[target + 13] = _RawDataFromFile[source + 14];
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RawDataOfSurface[target + 14] = _RawDataFromFile[source + 13];
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RawDataOfSurface[target + 15] = _RawDataFromFile[source + 12];
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break;
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case (PixelInternalFormat) ExtTextureCompressionS3tc.CompressedRgbaS3tcDxt5Ext:
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// Alpha, the first 2 bytes remain
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RawDataOfSurface[target + 0] = _RawDataFromFile[source + 0];
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RawDataOfSurface[target + 1] = _RawDataFromFile[source + 1];
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// extract 3 bits each and flip them
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GetBytesFromUInt24( ref RawDataOfSurface, (uint) target + 5, FlipUInt24( GetUInt24( ref _RawDataFromFile, (uint) source + 2 ) ) );
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GetBytesFromUInt24( ref RawDataOfSurface, (uint) target + 2, FlipUInt24( GetUInt24( ref _RawDataFromFile, (uint) source + 5 ) ) );
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// Color
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|
RawDataOfSurface[target + 8] = _RawDataFromFile[source + 8];
|
|
RawDataOfSurface[target + 9] = _RawDataFromFile[source + 9];
|
|
RawDataOfSurface[target + 10] = _RawDataFromFile[source + 10];
|
|
RawDataOfSurface[target + 11] = _RawDataFromFile[source + 11];
|
|
RawDataOfSurface[target + 12] = _RawDataFromFile[source + 15];
|
|
RawDataOfSurface[target + 13] = _RawDataFromFile[source + 14];
|
|
RawDataOfSurface[target + 14] = _RawDataFromFile[source + 13];
|
|
RawDataOfSurface[target + 15] = _RawDataFromFile[source + 12];
|
|
break;
|
|
default:
|
|
throw new ArgumentException( "ERROR: Should have never arrived here! Bad _PixelInternalFormat! Should have been dealt with much earlier." );
|
|
}
|
|
#endregion Swap Bytes
|
|
}
|
|
}
|
|
}
|
|
#endregion Prepare Array for TexImage
|
|
|
|
#region Create TexImage
|
|
switch ( dimension )
|
|
{
|
|
case TextureTarget.Texture2D:
|
|
GL.CompressedTexImage2D( TextureTarget.Texture2D,
|
|
Level,
|
|
_PixelInternalFormat,
|
|
Width,
|
|
Height,
|
|
TextureLoaderParameters.Border,
|
|
SurfaceSizeInBytes,
|
|
RawDataOfSurface );
|
|
break;
|
|
case TextureTarget.TextureCubeMap:
|
|
GL.CompressedTexImage2D( TextureTarget.TextureCubeMapPositiveX + Slices,
|
|
Level,
|
|
_PixelInternalFormat,
|
|
Width,
|
|
Height,
|
|
TextureLoaderParameters.Border,
|
|
SurfaceSizeInBytes,
|
|
RawDataOfSurface );
|
|
break;
|
|
case TextureTarget.Texture1D: // Untested
|
|
case TextureTarget.Texture3D: // Untested
|
|
default:
|
|
throw new ArgumentException( "ERROR: Use DXT for 2D Images only. Cannot evaluate " + dimension );
|
|
}
|
|
GL.Finish( );
|
|
#endregion Create TexImage
|
|
|
|
#region Query Success
|
|
int width, height, internalformat, compressed;
|
|
switch ( dimension )
|
|
{
|
|
case TextureTarget.Texture1D:
|
|
case TextureTarget.Texture2D:
|
|
case TextureTarget.Texture3D:
|
|
GL.GetTexLevelParameter( dimension, Level, GetTextureParameter.TextureWidth, out width );
|
|
GL.GetTexLevelParameter( dimension, Level, GetTextureParameter.TextureHeight, out height );
|
|
GL.GetTexLevelParameter( dimension, Level, GetTextureParameter.TextureInternalFormat, out internalformat );
|
|
GL.GetTexLevelParameter( dimension, Level, GetTextureParameter.TextureCompressed, out compressed );
|
|
break;
|
|
case TextureTarget.TextureCubeMap:
|
|
GL.GetTexLevelParameter( TextureTarget.TextureCubeMapPositiveX + Slices, Level, GetTextureParameter.TextureWidth, out width );
|
|
GL.GetTexLevelParameter( TextureTarget.TextureCubeMapPositiveX + Slices, Level, GetTextureParameter.TextureHeight, out height );
|
|
GL.GetTexLevelParameter( TextureTarget.TextureCubeMapPositiveX + Slices, Level, GetTextureParameter.TextureInternalFormat, out internalformat );
|
|
GL.GetTexLevelParameter( TextureTarget.TextureCubeMapPositiveX + Slices, Level, GetTextureParameter.TextureCompressed, out compressed );
|
|
break;
|
|
default:
|
|
throw Unfinished;
|
|
}
|
|
GLError = GL.GetError( );
|
|
if ( TextureLoaderParameters.Verbose )
|
|
Trace.WriteLine( "GL: " + GLError.ToString( ) + " Level: " + Level + " DXTn: " + ( ( compressed == 1 ) ? "Yes" : "No" ) + " Frmt:" + (ExtTextureCompressionS3tc) internalformat + " " + width + "*" + height );
|
|
if ( GLError != ErrorCode.NoError || compressed == 0 || width == 0 || height == 0 || internalformat == 0 )
|
|
{
|
|
GL.DeleteTextures( 1, ref texturehandle );
|
|
throw new ArgumentException( "ERROR: Something went wrong after GL.CompressedTexImage(); Last GL Error: " + GLError.ToString( ) );
|
|
}
|
|
#endregion Query Success
|
|
} else
|
|
{
|
|
if ( trueMipMapCount > Level )
|
|
trueMipMapCount = Level - 1; // The current Level is invalid
|
|
}
|
|
|
|
#region Prepare the next MipMap level
|
|
Width /= 2;
|
|
if ( Width < 1 )
|
|
Width = 1;
|
|
Height /= 2;
|
|
if ( Height < 1 )
|
|
Height = 1;
|
|
Cursor += SurfaceSizeInBytes;
|
|
#endregion Prepare the next MipMap level
|
|
}
|
|
|
|
#region Set States properly
|
|
GL.TexParameter( dimension, (TextureParameterName) All.TextureBaseLevel, 0 );
|
|
GL.TexParameter( dimension, (TextureParameterName) All.TextureMaxLevel, trueMipMapCount );
|
|
|
|
int TexMaxLevel;
|
|
GL.GetTexParameter( dimension, GetTextureParameter.TextureMaxLevel, out TexMaxLevel );
|
|
|
|
if ( TextureLoaderParameters.Verbose )
|
|
Trace.WriteLine( "Verification: GL: " + GL.GetError( ).ToString( ) + " TextureMaxLevel: " + TexMaxLevel + ( ( TexMaxLevel == trueMipMapCount ) ? " (Correct.)" : " (Wrong!)" ) );
|
|
#endregion Set States properly
|
|
}
|
|
|
|
#region Set Texture Parameters
|
|
GL.TexParameter( dimension, TextureParameterName.TextureMinFilter, (int) TextureLoaderParameters.MinificationFilter );
|
|
GL.TexParameter( dimension, TextureParameterName.TextureMagFilter, (int) TextureLoaderParameters.MagnificationFilter );
|
|
|
|
GL.TexParameter( dimension, TextureParameterName.TextureWrapS, (int) TextureLoaderParameters.WrapModeS );
|
|
GL.TexParameter( dimension, TextureParameterName.TextureWrapT, (int) TextureLoaderParameters.WrapModeT );
|
|
|
|
GL.TexEnv( TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int) TextureLoaderParameters.EnvMode );
|
|
|
|
GLError = GL.GetError( );
|
|
if ( GLError != ErrorCode.NoError )
|
|
{
|
|
throw new ArgumentException( "Error setting Texture Parameters. GL Error: " + GLError );
|
|
}
|
|
#endregion Set Texture Parameters
|
|
|
|
// If it made it here without throwing any Exception the result is a valid Texture.
|
|
return; // success
|
|
#endregion send the Texture to GL
|
|
} catch ( Exception e )
|
|
{
|
|
dimension = (TextureTarget) 0;
|
|
texturehandle = TextureLoaderParameters.OpenGLDefaultTexture;
|
|
throw new ArgumentException( "ERROR: Exception caught when attempting to load file " + filename + ".\n" + e + "\n" + GetDescriptionFromFile( filename ) );
|
|
// return; // failure
|
|
} finally
|
|
{
|
|
_RawDataFromFile = null; // clarity, not really needed
|
|
}
|
|
#endregion Try
|
|
}
|
|
|
|
#region Helpers
|
|
private static void ConvertDX9Header( ref byte[] input )
|
|
{
|
|
UInt32 offset = 0;
|
|
idString = GetString( ref input, offset );
|
|
offset += 4;
|
|
dwSize = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwFlags = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwHeight = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwWidth = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwPitchOrLinearSize = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwDepth = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwMipMapCount = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
#if READALL
|
|
dwReserved1 = new UInt32[11]; // reserved
|
|
#endif
|
|
offset += 4 * 11;
|
|
pfSize = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfFlags = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfFourCC = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
#if READALL
|
|
pfRGBBitCount = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfRBitMask = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfGBitMask = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfBBitMask = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
pfABitMask = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
#else
|
|
offset += 20;
|
|
#endif
|
|
dwCaps1 = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
dwCaps2 = GetUInt32( ref input, offset );
|
|
offset += 4;
|
|
#if READALL
|
|
dwReserved2 = new UInt32[3]; // offset is 4+112 here, + 12 = 4+124
|
|
#endif
|
|
offset += 4 * 3;
|
|
}
|
|
|
|
/// <summary> Returns true if the flag is set, false otherwise</summary>
|
|
private static bool CheckFlag( uint variable, uint flag )
|
|
{
|
|
return ( variable & flag ) > 0 ? true : false;
|
|
}
|
|
|
|
private static string GetString( ref byte[] input, uint offset )
|
|
{
|
|
return "" + (char) input[offset + 0] + (char) input[offset + 1] + (char) input[offset + 2] + (char) input[offset + 3];
|
|
}
|
|
|
|
private static uint GetUInt32( ref byte[] input, uint offset )
|
|
{
|
|
return (uint) ( ( ( input[offset + 3] * 256 + input[offset + 2] ) * 256 + input[offset + 1] ) * 256 + input[offset + 0] );
|
|
}
|
|
|
|
private static uint GetUInt24( ref byte[] input, uint offset )
|
|
{
|
|
return (uint) ( ( input[offset + 2] * 256 + input[offset + 1] ) * 256 + input[offset + 0] );
|
|
}
|
|
|
|
private static void GetBytesFromUInt24( ref byte[] input, uint offset, uint splitme )
|
|
{
|
|
input[offset + 0] = (byte) ( splitme & 0x000000ff );
|
|
input[offset + 1] = (byte) ( ( splitme & 0x0000ff00 ) >> 8 );
|
|
input[offset + 2] = (byte) ( ( splitme & 0x00ff0000 ) >> 16 );
|
|
return;
|
|
}
|
|
|
|
/// <summary>DXT5 Alpha block flipping, inspired by code from Evan Hart (nVidia SDK)</summary>
|
|
private static uint FlipUInt24( uint inputUInt24 )
|
|
{
|
|
byte[][] ThreeBits = new byte[2][];
|
|
for ( int i = 0 ; i < 2 ; i++ )
|
|
ThreeBits[i] = new byte[4];
|
|
|
|
// extract 3 bits each into the array
|
|
ThreeBits[0][0] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[0][1] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[0][2] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[0][3] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[1][0] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[1][1] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[1][2] = (byte) ( inputUInt24 & BitMask );
|
|
inputUInt24 >>= 3;
|
|
ThreeBits[1][3] = (byte) ( inputUInt24 & BitMask );
|
|
|
|
// stuff 8x 3bits into 3 bytes
|
|
uint Result = 0;
|
|
Result = Result | (uint) ( ThreeBits[1][0] << 0 );
|
|
Result = Result | (uint) ( ThreeBits[1][1] << 3 );
|
|
Result = Result | (uint) ( ThreeBits[1][2] << 6 );
|
|
Result = Result | (uint) ( ThreeBits[1][3] << 9 );
|
|
Result = Result | (uint) ( ThreeBits[0][0] << 12 );
|
|
Result = Result | (uint) ( ThreeBits[0][1] << 15 );
|
|
Result = Result | (uint) ( ThreeBits[0][2] << 18 );
|
|
Result = Result | (uint) ( ThreeBits[0][3] << 21 );
|
|
return Result;
|
|
}
|
|
#endregion Helpers
|
|
|
|
#region String Representations
|
|
private static string GetDescriptionFromFile( string filename )
|
|
{
|
|
return "\n--> Header of " + filename +
|
|
"\nID: " + idString +
|
|
"\nSize: " + dwSize +
|
|
"\nFlags: " + dwFlags + " (" + (eDDSD) dwFlags + ")" +
|
|
"\nHeight: " + dwHeight +
|
|
"\nWidth: " + dwWidth +
|
|
"\nPitch: " + dwPitchOrLinearSize +
|
|
"\nDepth: " + dwDepth +
|
|
"\nMipMaps: " + dwMipMapCount +
|
|
"\n\n---PixelFormat---" + filename +
|
|
"\nSize: " + pfSize +
|
|
"\nFlags: " + pfFlags + " (" + (eDDPF) pfFlags + ")" +
|
|
"\nFourCC: " + pfFourCC + " (" + (eFOURCC) pfFourCC + ")" +
|
|
#if READALL
|
|
"\nBitcount: " + pfRGBBitCount +
|
|
"\nBitMask Red: " + pfRBitMask +
|
|
"\nBitMask Green: " + pfGBitMask +
|
|
"\nBitMask Blue: " + pfBBitMask +
|
|
"\nBitMask Alpha: " + pfABitMask +
|
|
#endif
|
|
"\n\n---Capabilities---" + filename +
|
|
"\nCaps1: " + dwCaps1 + " (" + (eDDSCAPS) dwCaps1 + ")" +
|
|
"\nCaps2: " + dwCaps2 + " (" + (eDDSCAPS2) dwCaps2 + ")";
|
|
}
|
|
|
|
private static string GetDescriptionFromMemory( string filename, TextureTarget Dimension )
|
|
{
|
|
return "\nFile: " + filename +
|
|
"\nDimension: " + Dimension +
|
|
"\nSize: " + _Width + " * " + _Height + " * " + _Depth +
|
|
"\nCompressed: " + _IsCompressed +
|
|
"\nBytes for Main Image: " + _BytesForMainSurface +
|
|
"\nMipMaps: " + _MipMapCount;
|
|
}
|
|
#endregion String Representations
|
|
}
|
|
}
|