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//! \file ImageZAW.cs
//! \date Fri Jul 01 18:22:28 2016
//! \brief GEM/vnengine image format.
//
// 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.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Compression;
using GameRes.Utility;
namespace GameRes.Formats.VnEngine
{
[Export(typeof(ImageFormat))]
public class ZawFormat : ImageFormat
{
public override string Tag { get { return "ZAW"; } }
public override string Description { get { return "GEM/vnengine image format"; } }
public override uint Signature { get { return 0x57415A; } } // 'ZAW'
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
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var header = stream.ReadHeader (0x40).ToArray();
uint crc = header.ToUInt32 (4);
LittleEndian.Pack (0u, header, 4);
if (crc != Crc32.Compute (header, 0, header.Length))
return null;
int bpp = 3 == header[12] ? 32
: 2 == header[12] ? 16
: 1 == header[12] ? 24 : 8;
return new ImageMetaData
{
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Width = header.ToUInt32 (0x10),
Height = header.ToUInt32 (0x14),
OffsetX = header.ToInt32 (0x18),
OffsetY = header.ToInt32 (0x1C),
BPP = bpp,
};
}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
int pixel_size = info.BPP / 8;
int stride = (int)info.Width * pixel_size;
var pixels = new byte[stride * (int)info.Height];
stream.Position = 0x40;
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using (var input = new ZLibStream (stream.AsStream, CompressionMode.Decompress, true))
input.Read (pixels, 0, pixels.Length);
if (24 == info.BPP)
return ImageData.Create (info, PixelFormats.Rgb24, null, pixels, stride);
if (8 == info.BPP)
return ImageData.Create (info, PixelFormats.Gray8, null, pixels, stride);
if (16 == info.BPP)
return GrayWithAlpha (info, pixels);
for (int i = 0; i < pixels.Length; i += pixel_size)
{
byte t = pixels[i];
pixels[i] = pixels[i+2];
pixels[i+2] = t;
pixels[i+3] = (byte)System.Math.Min (pixels[i+3] * 0xFF / 0x80, 0xFF);
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride);
}
ImageData GrayWithAlpha (ImageMetaData info, byte[] input)
{
int stride = (int)info.Width * 4;
byte[] pixels = new byte[stride * info.Height];
int src = 0;
for (int dst = 0; dst < pixels.Length; dst += 4)
{
pixels[dst] = pixels[dst+1] = pixels[dst+2] = input[src++];
pixels[dst+3] = (byte)System.Math.Min (input[src++] * 0xFF / 0x80, 0xFF);
}
return ImageData.Create (info, PixelFormats.Bgra32, null, pixels, stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("ZawFormat.Write not implemented");
}
}
}