//! \file ImageXTX.cs //! \date Mon Feb 29 19:14:55 2016 //! \brief Xbox 360 texture. // // Copyright (C) 2016 by morkt // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to // deal in the Software without restriction, including without limitation the // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or // sell copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS // IN THE SOFTWARE. // using System; using System.ComponentModel.Composition; using System.IO; using System.Windows.Media; using GameRes.Utility; namespace GameRes.Formats.Cri { internal class XtxMetaData : ImageMetaData { public byte Format; public uint DataOffset; public int AlignedWidth; public int AlignedHeight; } [Export(typeof(ImageFormat))] public class XtxFormat : ImageFormat { public override string Tag { get { return "XTX"; } } public override string Description { get { return "Xbox 360 texture format"; } } public override uint Signature { get { return 0x00787478; } } // 'xtx' public XtxFormat () { Signatures = new uint[] { 0x00787478, 0 }; } public override ImageMetaData ReadMetaData (IBinaryStream stream) { var header = stream.ReadHeader (0x20).ToArray(); if (!Binary.AsciiEqual (header, 0, "xtx\0")) { var header_size = LittleEndian.ToUInt32 (header, 0); if (header_size >= 0x1000) // XXX use some arbitrary "large" value to avoid call to Stream.Length return null; stream.Position = header_size; if (0x20 != stream.Read (header, 0, 0x20)) return null; if (!Binary.AsciiEqual (header, 0, "xtx\0")) return null; } if (header[4] > 2) return null; int aligned_width = BigEndian.ToInt32 (header, 8); int aligned_height = BigEndian.ToInt32 (header, 0xC); if (aligned_width <= 0 || aligned_height <= 0) return null; return new XtxMetaData { Width = BigEndian.ToUInt32 (header, 0x10), Height = BigEndian.ToUInt32 (header, 0x14), OffsetX = BigEndian.ToInt32 (header, 0x18), OffsetY = BigEndian.ToInt32 (header, 0x1C), BPP = 32, Format = header[4], AlignedWidth = aligned_width, AlignedHeight = aligned_height, DataOffset = (uint)stream.Position, }; } public override ImageData Read (IBinaryStream stream, ImageMetaData info) { var reader = new XtxReader (stream.AsStream, (XtxMetaData)info); var pixels = reader.Unpack(); return ImageData.Create (info, reader.Format, null, pixels); } public override void Write (Stream file, ImageData image) { throw new System.NotImplementedException ("XtxFormat.Write not implemented"); } } internal sealed class XtxReader { Stream m_input; int m_width; int m_height; XtxMetaData m_info; byte[] m_output; int m_output_stride; public byte[] Data { get { return m_output; } } public PixelFormat Format { get; private set; } public XtxReader (Stream input, XtxMetaData info) { m_input = input; m_info = info; m_input.Position = info.DataOffset; m_width = (int)m_info.Width; m_output_stride = m_width * 4; m_height = (int)m_info.Height; m_output = new byte[m_output_stride*m_height]; } public byte[] Unpack () { Format = PixelFormats.Bgra32; if (0 == m_info.Format) ReadTex0(); else if (1 == m_info.Format) ReadTex1(); else ReadTex2(); return m_output; } void ReadTex0 () { int total = m_info.AlignedWidth * m_info.AlignedHeight; var texture = new byte[total*4]; m_input.Read (texture, 0, texture.Length); int src = 0; for (int i = 0; i < total; ++i) { int y = GetY (i, m_info.AlignedWidth, 4); int x = GetX (i, m_info.AlignedWidth, 4); if (y < m_height && x < m_width) { int dst = m_output_stride * y + x * 4; m_output[dst] = texture[src+3]; m_output[dst+1] = texture[src+2]; m_output[dst+2] = texture[src+1]; m_output[dst+3] = texture[src]; } src += 4; } } void ReadTex1 () { int total = m_info.AlignedWidth * m_info.AlignedHeight; var texture = new byte[total*2]; var packed = new byte[total*2]; m_input.Read (texture, 0, texture.Length); int stride = m_info.AlignedWidth; int src = 0; for (int i = 0; i < total; ++i) { int y = GetY (i, m_info.AlignedWidth, 2); int x = GetX (i, m_info.AlignedWidth, 2); int dst = (x + y * stride) * 2; packed[dst] = texture[src+1]; packed[dst+1] = texture[src]; src += 2; } Format = PixelFormats.Bgr565; m_output = packed; throw new NotImplementedException ("XTX textures format 1 not implemented"); } void ReadTex2 () { int tex_width = m_info.AlignedWidth >> 2; int total = tex_width * (m_info.AlignedHeight >> 2); var texture = new byte[m_info.AlignedWidth * m_info.AlignedHeight]; var packed = new byte[m_info.AlignedWidth * m_info.AlignedHeight]; m_input.Read (texture, 0, texture.Length); int src = 0; for (int i = 0; i < total; ++i) { int y = GetY (i, tex_width, 0x10); int x = GetX (i, tex_width, 0x10); int dst = (x + y * tex_width) * 16; for (int j = 0; j < 8; ++j) { packed[dst++] = texture[src+1]; packed[dst++] = texture[src]; src += 2; } } var dxt = new DirectDraw.DxtDecoder (packed, m_info); m_output = dxt.UnpackDXT5(); } static int GetY (int i, int width, byte level) { int v1 = (level >> 2) + (level >> 1 >> (level >> 2)); int v2 = i << v1; int v3 = (v2 & 0x3F) + ((v2 >> 2) & 0x1C0) + ((v2 >> 3) & 0x1FFFFE00); return ((v3 >> 4) & 1) + ((((v3 & ((level << 6) - 1) & -0x20) + ((((v2 & 0x3F) + ((v2 >> 2) & 0xC0)) & 0xF) << 1)) >> (v1 + 3)) & -2) + ((((v2 >> 10) & 2) + ((v3 >> (v1 + 6)) & 1) + (((v3 >> (v1 + 7)) / ((width + 31) >> 5)) << 2)) << 3); } static int GetX (int i, int width, byte level) { int v1 = (level >> 2) + (level >> 1 >> (level >> 2)); int v2 = i << v1; int v3 = (v2 & 0x3F) + ((v2 >> 2) & 0x1C0) + ((v2 >> 3) & 0x1FFFFE00); return ((((level << 3) - 1) & ((v3 >> 1) ^ (v3 ^ (v3 >> 1)) & 0xF)) >> v1) + ((((((v2 >> 6) & 0xFF) + ((v3 >> (v1 + 5)) & 0xFE)) & 3) + (((v3 >> (v1 + 7)) % (((width + 31)) >> 5)) << 2)) << 3); } } }