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(Legacy): Lazycrew archives.

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morkt
2018-09-21 00:14:34 +04:00
parent 37e96ac53f
commit 666c8f4f14
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Legacy/Lazycrew/ImageDAT.cs Normal file
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//! \file ImageDAT.cs
//! \date 2018 Sep 20
//! \brief Lazycrew 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 System.Windows.Media.Imaging;
namespace GameRes.Formats.Lazycrew
{
internal class LcImageMetaData : ImageMetaData
{
public int Format;
public int Compression;
public int DataOffset;
public bool IsCompressed { get { return (Compression & 0x8000) != 0; } }
public bool HasAlpha { get { return Format == 2 || Format == 3; } }
}
internal class LcImageDecoder : BinaryImageDecoder
{
LcImageMetaData m_info;
int m_stride;
BitmapPalette m_palette;
public LcImageDecoder (IBinaryStream input, LcImageMetaData info) : base (input, info)
{
m_info = info;
}
protected override ImageData GetImageData ()
{
m_input.Position = m_info.DataOffset;
if (m_info.BPP <= 8)
{
int colors = m_input.ReadUInt16();
if (m_info.Format != 4)
m_palette = ImageFormat.ReadPalette (m_input.AsStream, colors);
else // grayscale image - ignore palette
m_input.Seek (colors * 4, SeekOrigin.Current);
}
m_stride = (int)m_info.Width * m_info.BPP / 8;
var pixels = new byte[m_stride * (int)m_info.Height];
if (24 == m_info.BPP)
Unpack24bpp (pixels);
else if (m_info.IsCompressed)
UnpackRle (pixels);
else
m_input.Read (pixels, 0, pixels.Length);
if (m_info.HasAlpha && m_info.BPP != 4)
{
var header = m_input.ReadBytes (8);
bool is_compressed = (header[1] & 0x80) != 0;
int colors = header.ToUInt16 (6);
m_input.Seek (colors * 4, SeekOrigin.Current);
var alpha = new byte[(int)m_info.Width * (int)m_info.Height];
if (is_compressed)
UnpackRle (alpha);
else
m_input.Read (alpha, 0, pixels.Length);
return ApplyAlpha (pixels, alpha);
}
return ImageData.Create (m_info, GetPixelFormat(), m_palette, pixels, m_stride);
}
ImageData ApplyAlpha (byte[] rgb, byte[] alpha)
{
int stride = (int)m_info.Width * 4;
var output = new byte[stride * (int)m_info.Height];
int dst = 0;
int src = 0;
int asrc = 0;
if (8 == m_info.BPP)
{
var color_map = m_palette.Colors;
while (dst < output.Length)
{
var color = color_map[rgb[src++]];
output[dst++] = color.B;
output[dst++] = color.G;
output[dst++] = color.R;
output[dst++] = alpha[asrc++];
}
}
else
{
while (dst < output.Length)
{
output[dst++] = rgb[src++];
output[dst++] = rgb[src++];
output[dst++] = rgb[src++];
output[dst++] = alpha[asrc++];
}
}
m_info.BPP = 32;
return ImageData.Create (m_info, PixelFormats.Bgra32, null, output, stride);
}
void UnpackRle (byte[] output)
{
int dst = 0;
while (dst < output.Length)
{
int count = m_input.ReadByte();
if (-1 == count)
break;
if (count > 0x7F)
{
count = (count & 0x7F) + 1;
byte v = m_input.ReadUInt8();
for (int i = 0; i < count; ++i)
output[dst+i] = v;
}
else
{
m_input.Read (output, dst, ++count);
}
dst += count;
}
}
void Unpack24bpp (byte[] output)
{
var color = new byte[6];
int dst = 0;
while (dst < output.Length)
{
int dst1 = dst + m_stride;
for (int x = 0; x < m_stride; x += 6)
{
if (m_input.Read (color, 0, 6) < 6)
return;
int r = (10638 * (sbyte)color[1] + 18651 * (sbyte)color[0]) >> 14;
int b = (29145 * (sbyte)color[1] - 21601 * (sbyte)color[0]) >> 14;
int g = (-5312 * (sbyte)color[0] - 11083 * (sbyte)color[1]) >> 14;
output[dst++] = RgbClamp (color[2] + b);
output[dst++] = RgbClamp (color[2] + g);
output[dst++] = RgbClamp (color[2] + r);
output[dst++] = RgbClamp (color[3] + b);
output[dst++] = RgbClamp (color[3] + g);
output[dst++] = RgbClamp (color[3] + r);
output[dst1++] = RgbClamp (color[4] + b);
output[dst1++] = RgbClamp (color[4] + g);
output[dst1++] = RgbClamp (color[4] + r);
output[dst1++] = RgbClamp (color[5] + b);
output[dst1++] = RgbClamp (color[5] + g);
output[dst1++] = RgbClamp (color[5] + r);
}
dst += m_stride;
}
}
static byte RgbClamp (int color)
{
if (color < 0)
return 0;
else if (color > 0xFF)
return 0xFF;
else
return (byte)color;
}
PixelFormat GetPixelFormat ()
{
if (4 == m_info.Format)
return PixelFormats.Gray8;
switch (m_info.BPP)
{
case 4: return PixelFormats.Indexed4;
case 8: return PixelFormats.Indexed8;
case 24: return PixelFormats.Bgr24;
default: throw new InvalidFormatException();
}
}
}
}