GARbro-mirror/ArcFormats/Cri/ImageXTX.cs

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//! \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 };
}
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
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var header = stream.ReadHeader (0x20).ToArray();
if (!Binary.AsciiEqual (header, 0, "xtx\0"))
{
var header_size = LittleEndian.ToUInt32 (header, 0);
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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,
};
}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
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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;
public PixelFormat Format { get; private set; }
public XtxReader (Stream input, XtxMetaData info)
{
m_input = input;
m_info = info;
m_width = (int)m_info.Width;
m_height = (int)m_info.Height;
}
public byte[] Unpack ()
{
m_input.Position = m_info.DataOffset;
Format = PixelFormats.Bgra32;
if (0 == m_info.Format)
return ReadTex0();
else if (1 == m_info.Format)
return ReadTex1();
else
return ReadTex2();
}
byte[] ReadTex0 ()
{
int output_stride = m_width * 4;
var output = new byte[output_stride*m_height];
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 = output_stride * y + x * 4;
output[dst] = texture[src+3];
output[dst+1] = texture[src+2];
output[dst+2] = texture[src+1];
output[dst+3] = texture[src];
}
src += 4;
}
return output;
}
byte[] 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;
throw new NotImplementedException ("XTX textures format 1 not implemented");
// return packed;
}
byte[] 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;
}
}
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var dxt = new DirectDraw.DxtDecoder (packed, m_info);
return 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);
}
}
}