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2018-09-14 00:59:05 +04:00

152 lines
5.1 KiB
C#

//! \file ImageGEM.cs
//! \date 2018 Sep 04
//! \brief Wing image format.
//
// Copyright (C) 2018 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;
// [030912][Wing] Minato Gensou ~Venice Fantastica~
// [031010][Hachimitsu] Yori Shiro
namespace GameRes.Formats.Wing
{
internal class GemMetaData : ImageMetaData
{
public int Method;
public int Alpha;
}
[Export(typeof(ImageFormat))]
public class GemFormat : ImageFormat
{
public override string Tag { get { return "GEM"; } }
public override string Description { get { return "Wing image format"; } }
public override uint Signature { get { return 0; } }
public GemFormat ()
{
Signatures = new uint[] { 0x14000A, 0x32000A };
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x10);
int alpha = header.ToInt16 (2);
int method = header.ToInt16 (4);
if (method != 0x64 && method != 0xE6)
return null;
int bpp = header.ToInt16 (6);
if (bpp != 32)
return null;
return new GemMetaData {
Width = header.ToUInt16 (10),
Height = header.ToUInt16 (8),
BPP = bpp,
Method = method,
Alpha = alpha,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new GemReader (file, (GemMetaData)info);
var pixels = reader.Unpack();
return ImageData.Create (info, reader.Format, null, pixels, reader.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GemFormat.Write not implemented");
}
}
internal class GemReader
{
IBinaryStream m_input;
GemMetaData m_info;
int m_stride;
int m_height;
public PixelFormat Format { get; private set; }
public int Stride { get { return m_stride; } }
public GemReader (IBinaryStream input, GemMetaData info)
{
m_input = input;
m_info = info;
m_stride = (int)info.Width * 4;
m_height = (int)info.Height;
Format = m_info.Alpha == 50 ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
}
public byte[] Unpack ()
{
m_input.Position = 0x10;
var pixels = new byte[m_stride * m_height];
using (var input = new LzssStream (m_input.AsStream, LzssMode.Decompress, true))
input.Read (pixels, 0, pixels.Length);
if (0x64 == m_info.Method)
RestoreRGB (pixels);
if (50 == m_info.Alpha)
RestoreAlpha (pixels);
return pixels;
}
void RestoreRGB (byte[] pixels)
{
for (int y = 1; y < m_height; ++y)
{
int dst = y * m_stride + 4;
for (int x = 4; x < m_stride; x += 4)
{
int b = pixels[dst - 4] + pixels[dst - m_stride ] - pixels[dst - m_stride - 4];
int g = pixels[dst - 3] + pixels[dst - m_stride + 1] - pixels[dst - m_stride - 3];
int r = pixels[dst - 2] + pixels[dst - m_stride + 2] - pixels[dst - m_stride - 2];
pixels[dst ] += (byte)b;
pixels[dst+1] += (byte)g;
pixels[dst+2] += (byte)r;
dst += 4;
}
}
}
void RestoreAlpha (byte[] pixels)
{
for (int src = 3; src < pixels.Length; src += 4)
{
pixels[src] ^= 0xFF;
}
}
}
[Export(typeof(ResourceAlias))]
[ExportMetadata("Extension", "CGR")]
[ExportMetadata("Target", "PSD")]
public class CgrFormat : ResourceAlias
{
}
}