GARbro-mirror/ArcFormats/Ucom/ImageGPC.cs

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//! \file ImageGPC.cs
//! \date 2017 Nov 22
//! \brief For/Ucom image format.
//
// Copyright (C) 2017 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 System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Ucom
{
internal class GpcMetaData : ImageMetaData
{
public int PaletteColors;
}
[Export(typeof(ImageFormat))]
public class GpcFormat : ImageFormat
{
public override string Tag { get { return "GPC"; } }
public override string Description { get { return "For/Ucom image format"; } }
public override uint Signature { get { return 0x00285047; } } // 'GP('
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (0x26);
int header_length = header.ToInt32 (2);
uint width = header.ToUInt32 (6);
uint height = header.ToUInt32 (0xA);
int bpp = header.ToUInt16 (0x10);
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if (bpp != 8 && bpp != 24 && bpp != 32)
return null;
int colors = 0;
if (8 == bpp)
{
colors = header.ToInt32 (0x22);
if (0 == colors)
colors = 0x100;
}
return new GpcMetaData {
Width = width,
Height = height,
BPP = bpp,
PaletteColors = colors,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var gpc = new GpcReader (file, (GpcMetaData)info);
gpc.Unpack();
return ImageData.Create (info, gpc.Format, gpc.Palette, gpc.Data, gpc.Stride);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GpcFormat.Write not implemented");
}
}
internal sealed class GpcReader
{
IBinaryStream m_input;
int m_width;
int m_height;
int m_stride;
int m_colors;
int m_pixel_size;
byte[] m_output;
public BitmapPalette Palette { get; private set; }
public PixelFormat Format { get; private set; }
public byte[] Data { get { return m_output; } }
public int Stride { get { return m_stride; } }
public GpcReader (IBinaryStream input, GpcMetaData info)
{
m_input = input;
m_width = (int)info.Width;
m_height = (int)info.Height;
m_pixel_size = info.BPP / 8;
m_colors = info.PaletteColors;
m_stride = (m_width * m_pixel_size + 3) & ~3;
m_output = new byte[m_height * m_stride];
if (1 == m_pixel_size)
Format = PixelFormats.Indexed8;
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else if (3 == m_pixel_size)
Format = PixelFormats.Bgr24;
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else
Format = PixelFormats.Bgra32;
}
public void Unpack ()
{
m_input.Position = 0x2A;
if (1 == m_pixel_size)
Palette = ImageFormat.ReadPalette (m_input.AsStream, m_colors);
int gap = m_stride - m_width * m_pixel_size;
for (int dst_row = m_output.Length - m_stride; dst_row >= 0; dst_row -= m_stride)
{
int dst = dst_row;
int x = 0;
while (x < m_width)
{
byte ctl = m_input.ReadUInt8();
int count = (ctl >> 1) + 1;
int pixel_count = m_pixel_size * count;
if (0 == (ctl & 1))
{
m_input.Read (m_output, dst, pixel_count);
}
else
{
m_input.Read (m_output, dst, m_pixel_size);
Binary.CopyOverlapped (m_output, dst, dst+m_pixel_size, pixel_count - m_pixel_size);
}
dst += pixel_count;
x += count;
}
if (gap != 0)
m_input.Read (m_output, dst, gap);
}
}
}
}