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293 lines
10 KiB
C#
293 lines
10 KiB
C#
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//! \file ImagePMS.cs
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//! \date 2017 Nov 26
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//! \brief AliceSoft image format.
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//
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// Copyright (C) 2017 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using GameRes.Utility;
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namespace GameRes.Formats.AliceSoft
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{
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internal class PmsMetaData : ImageMetaData
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{
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public uint DataOffset;
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public uint AlphaOffset;
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}
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[Export(typeof(ImageFormat))]
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public class PmsFormat : ImageFormat
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{
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public override string Tag { get { return "PMS"; } }
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public override string Description { get { return "AliceSoft image format"; } }
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public override uint Signature { get { return 0x014D50; } } // 'PM'
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public PmsFormat ()
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{
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Signatures = new uint[] { 0x014D50, 0x024D50 };
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}
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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var header = file.ReadHeader (0x30);
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var info = new PmsMetaData {
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BPP = header[6],
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OffsetX = header.ToInt32 (0x10),
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OffsetY = header.ToInt32 (0x14),
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Width = header.ToUInt32 (0x18),
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Height = header.ToUInt32 (0x1C),
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DataOffset = header.ToUInt32 (0x20),
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AlphaOffset = header.ToUInt32 (0x24),
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};
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if ((info.BPP != 16 && info.BPP != 8) || info.DataOffset < 0x30 || info.DataOffset >= file.Length)
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return null;
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return info;
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}
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public override ImageData Read (IBinaryStream file, ImageMetaData info)
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{
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var pms = new PmsReader (file, (PmsMetaData)info);
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var bitmap = pms.Unpack();
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bitmap.Freeze();
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return new ImageData (bitmap, info);
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}
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public override void Write (Stream file, ImageData image)
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{
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throw new System.NotImplementedException ("PmsFormat.Write not implemented");
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}
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}
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internal class PmsReader
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{
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IBinaryStream m_input;
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PmsMetaData m_info;
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int m_width;
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int m_height;
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public PmsReader (IBinaryStream input, PmsMetaData info)
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{
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m_input = input;
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m_info = info;
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m_width = (int)m_info.Width;
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m_height = (int)m_info.Height;
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}
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public BitmapSource Unpack ()
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{
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switch (m_info.BPP)
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{
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case 16: return UnpackRgb();
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case 8: return UnpackIndexed();
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default: throw new InvalidFormatException();
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}
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}
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BitmapSource UnpackIndexed ()
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{
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m_input.Position = m_info.AlphaOffset;
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var palette = ImageFormat.ReadPalette (m_input.AsStream, 0x100, PaletteFormat.Rgb);
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m_input.Position = m_info.DataOffset;
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var pixels = Unpack8bpp();
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return BitmapSource.Create (m_width, m_height, ImageData.DefaultDpiX, ImageData.DefaultDpiY,
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PixelFormats.Indexed8, palette, pixels, m_width);
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}
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BitmapSource UnpackRgb ()
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{
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m_input.Position = m_info.DataOffset;
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var pixels = Unpack16bpp();
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var source = BitmapSource.Create (m_width, m_height, ImageData.DefaultDpiX, ImageData.DefaultDpiY,
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PixelFormats.Bgr565, null, pixels, m_width*2);
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if (0 == m_info.AlphaOffset)
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return source;
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m_input.Position = m_info.AlphaOffset;
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var alpha = Unpack8bpp();
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source = new FormatConvertedBitmap (source, PixelFormats.Bgra32, null, 0);
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var output = new WriteableBitmap (source);
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output.Lock();
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unsafe
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{
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byte* buffer = (byte*)output.BackBuffer;
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int stride = output.BackBufferStride;
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int asrc = 0;
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for (int y = 0; y < m_height; ++y)
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{
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for (int x = 3; x < stride; x += 4)
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{
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buffer[x] = alpha[asrc++];
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}
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buffer += stride;
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}
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}
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output.AddDirtyRect (new Int32Rect (0, 0, m_width, m_height));
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output.Unlock();
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return output;
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}
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ushort[] Unpack16bpp ()
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{
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var output = new ushort[m_width * m_height];
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int stride = m_width;
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for (int y = 0; y < m_height; ++y)
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for (int x = 0; x < m_width; )
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{
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int dst = y * stride + x;
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int count = 1;
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byte ctl = m_input.ReadUInt8();
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if (ctl < 0xF8)
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{
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byte px = m_input.ReadUInt8();
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output[dst] = (ushort)(ctl | (px << 8));
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}
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else if (ctl == 0xF8)
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{
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output[dst] = m_input.ReadUInt16();
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}
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else if (ctl == 0xF9)
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{
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count = m_input.ReadUInt8() + 1;
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int p0 = m_input.ReadUInt8();
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int p1 = m_input.ReadUInt8();
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p0 = ((p0 & 0xE0) << 8) | ((p0 & 0x18) << 6) | ((p0 & 7) << 2);
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p1 = ((p1 & 0xC0) << 5) | ((p1 & 0x3C) << 3) | (p1 & 3);
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output[dst] = (ushort)(p0 | p1);
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for (int i = 1; i < count; i++)
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{
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p1 = m_input.ReadUInt8();
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p1 = ((p1 & 0xC0) << 5) | ((p1 & 0x3C) << 3) | (p1 & 3);
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output[dst + i] = (ushort)(p0 | p1);
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}
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}
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else if (ctl == 0xFA)
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{
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output[dst] = output[dst - stride + 1];
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}
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else if (ctl == 0xFB)
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{
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output[dst] = output[dst - stride - 1];
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}
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else if (ctl == 0xFC)
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{
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count = (m_input.ReadUInt8() + 2) * 2;
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ushort px0 = m_input.ReadUInt16();
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ushort px1 = m_input.ReadUInt16();
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for (int i = 0; i < count; i += 2)
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{
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output[dst + i ] = px0;
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output[dst + i + 1] = px1;
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}
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}
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else if (ctl == 0xFD)
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{
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count = m_input.ReadUInt8() + 3;
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ushort px = m_input.ReadUInt16();
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for (int i = 0; i < count; i++)
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{
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output[dst + i] = px;
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}
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}
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else if (ctl == 0xFE)
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{
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count = m_input.ReadUInt8() + 2;
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int src = dst - stride * 2;
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for (int i = 0; i < count; ++i)
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{
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output[dst+i] = output[src+i];
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}
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}
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else // ctl == 0xFF
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{
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count = m_input.ReadUInt8() + 2;
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int src = dst - stride;
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for (int i = 0; i < count; ++i)
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{
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output[dst+i] = output[src+i];
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}
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}
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x += count;
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}
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return output;
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}
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byte[] Unpack8bpp ()
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{
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var output = new byte[m_width * m_height];
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int stride = m_width;
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for (int y = 0; y < m_height; y++)
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for (int x = 0; x < m_width; )
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{
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int dst = y * stride + x;
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int count = 1;
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byte ctl = m_input.ReadUInt8();
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if (ctl < 0xF8)
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{
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output[dst] = ctl;
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}
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else if (ctl == 0xFF)
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{
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count = m_input.ReadUInt8() + 3;
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Binary.CopyOverlapped (output, dst - stride, dst, count);
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}
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else if (ctl == 0xFE)
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{
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count = m_input.ReadUInt8() + 3;
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Binary.CopyOverlapped (output, dst - stride * 2, dst, count);
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}
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else if (ctl == 0xFD)
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{
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count = m_input.ReadUInt8() + 4;
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byte px = m_input.ReadUInt8();
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for (int i = 0; i < count; ++i)
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{
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output[dst + i] = px;
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}
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}
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else if (ctl == 0xFC)
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{
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count = (m_input.ReadUInt8() + 3) * 2;
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byte px0 = m_input.ReadUInt8();
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byte px1 = m_input.ReadUInt8();
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for (int i = 0; i < count; i += 2)
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{
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output[dst + i ] = px0;
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output[dst + i + 1] = px1;
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}
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}
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else // >= 0xF8 < 0xFC
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{
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output[dst] = m_input.ReadUInt8();
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}
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x += count;
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}
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return output;
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}
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}
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}
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