mirror of
https://github.com/crskycode/GARbro.git
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344 lines
12 KiB
C#
344 lines
12 KiB
C#
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//! \file ImagePR1.cs
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//! \date 2023 Oct 04
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//! \brief Discovery image format (PC-98).
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//
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// Copyright (C) 2023 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;
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using System.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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namespace GameRes.Formats.Discovery
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{
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internal class PrMetaData : ImageMetaData
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{
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public byte Flags;
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public byte Mask;
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public bool IsLeftToRight => (Flags & 1) != 0;
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}
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[Export(typeof(ImageFormat))]
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public class Pr1Format : ImageFormat
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{
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public override string Tag => "PR1";
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public override string Description => "Discovery image format";
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public override uint Signature => 0;
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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if (!file.Name.HasAnyOfExtensions (".PR1", ".AN1"))
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return null;
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var header = file.ReadHeader (12);
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return new PrMetaData {
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Width = (uint)header.ToUInt16 (8) << 3,
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Height = header.ToUInt16 (0xA),
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OffsetX = header.ToUInt16 (2),
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OffsetY = header.ToUInt16 (4),
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Flags = header[0],
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Mask = header[1],
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BPP = 4,
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};
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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 reader = new PrReader (file, (PrMetaData)info);
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return reader.Unpack();
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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 ("Pr1Format.Write not implemented");
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}
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}
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internal class PrReader
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{
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IBinaryStream m_input;
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PrMetaData m_info;
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Action IncrementDest;
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Func<bool> IsDone;
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public PrMetaData Info => m_info;
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public PrReader (IBinaryStream file, PrMetaData info)
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{
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m_input = file;
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m_info = info;
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if (m_info.IsLeftToRight)
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{
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IncrementDest = IncLeftToRight;
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IsDone = () => m_dst >= m_plane_size;
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}
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else
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{
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IncrementDest = IncTopToBottom;
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IsDone = () => m_x >= m_stride;
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}
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}
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protected BitmapPalette m_palette;
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protected int m_stride;
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protected int m_plane_size;
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protected byte[][] m_planes;
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int m_dst;
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int m_x;
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protected void UnpackPlanes ()
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{
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const int buffer_slice = 0x410;
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m_input.Position = 0xC;
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m_palette = ReadPalette();
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m_stride = m_info.iWidth >> 3;
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m_plane_size = m_stride * m_info.iHeight;
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m_planes = new byte[][] {
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new byte[m_plane_size], new byte[m_plane_size], new byte[m_plane_size], new byte[m_plane_size],
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};
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var buffer = new byte[buffer_slice * 4];
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var buf_count = new byte[4];
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var offsets = new int[] { 0, buffer_slice, buffer_slice*2, buffer_slice*3 };
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m_dst = 0;
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m_x = 0;
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while (!IsDone())
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{
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int ctl = m_input.ReadByte();
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if (-1 == ctl)
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break;
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int count = (ctl & 0x1F) + 1;
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bool bit = (ctl & 0x20) != 0;
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ctl >>= 6;
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if (!bit)
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{
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if (ctl != 0)
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{
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int src_pos = ctl;
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int src_count2 = 1 << (ctl - 1);
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int pos = offsets[ctl];
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int count2 = src_count2;
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do
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{
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byte p0 = m_input.ReadUInt8();
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byte p1 = m_input.ReadUInt8();
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byte p2 = m_input.ReadUInt8();
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byte p3 = m_input.ReadUInt8();
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PutPixels (p0, p1, p2, p3);
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buffer[pos++] = p0;
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buffer[pos++] = p1;
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buffer[pos++] = p2;
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buffer[pos++] = p3;
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}
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while (--count > 0 && --count2 > 0);
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while (count > 0)
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{
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int si = offsets[src_pos];
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for (int i = 0; i < src_count2; ++i)
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{
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byte p0 = buffer[si++];
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byte p1 = buffer[si++];
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byte p2 = buffer[si++];
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byte p3 = buffer[si++];
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PutPixels (p0, p1, p2, p3);
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if (--count <= 0)
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break;
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}
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}
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offsets[src_pos] += src_count2 * 4;
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buf_count[src_pos] += (byte)src_count2;
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if (buf_count[src_pos] == 0)
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offsets[src_pos] = src_pos * buffer_slice;
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}
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else
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{
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while (count --> 0)
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{
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byte p0 = m_input.ReadUInt8();
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byte p1 = m_input.ReadUInt8();
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byte p2 = m_input.ReadUInt8();
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byte p3 = m_input.ReadUInt8();
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PutPixels (p0, p1, p2, p3);
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int pos = offsets[0];
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buffer[pos++] = p0;
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buffer[pos++] = p1;
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buffer[pos++] = p2;
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buffer[pos++] = p3;
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offsets[0] += 4;
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buf_count[0]++;
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if (0 == buf_count[0])
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offsets[0] = 0;
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}
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}
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}
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else if (ctl != 0)
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{
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int count2 = 1 << (ctl - 1);
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int off_diff = count2 << 2;
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int off_mask = off_diff - 1;
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int off = m_input.ReadUInt8() << 2;;
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int base_pos = ctl * buffer_slice;
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off += base_pos;
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int src = off;
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while (count > 0)
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{
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off = src;
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for (int i = 0; i < count2; ++i)
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{
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byte p0 = buffer[off];
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byte p1 = buffer[off+1];
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byte p2 = buffer[off+2];
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byte p3 = buffer[off+3];
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PutPixels (p0, p1, p2, p3);
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off += 4;
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int pos = off - base_pos;
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if ((pos & off_mask) == 0)
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off -= off_diff;
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if (--count <= 0)
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break;
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}
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}
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}
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else
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{
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while (count --> 0)
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{
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int off = m_input.ReadUInt8() << 2;
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byte p0 = buffer[off];
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byte p1 = buffer[off+1];
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byte p2 = buffer[off+2];
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byte p3 = buffer[off+3];
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PutPixels (p0, p1, p2, p3);
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}
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}
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}
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}
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public ImageData Unpack ()
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{
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UnpackPlanes();
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int output_stride = m_info.iWidth >> 1;
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var output = new byte[output_stride * m_info.iHeight];
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FlattenPlanes (0, output);
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return ImageData.Create (m_info, PixelFormats.Indexed4, m_palette, output, output_stride);
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}
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void PutPixels (byte p0, byte p1, byte p2, byte p3)
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{
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if (0xFF == m_info.Mask || true) // we don't do overlaying here, just single image decoding
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{
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m_planes[0][m_dst] = p0;
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m_planes[1][m_dst] = p1;
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m_planes[2][m_dst] = p2;
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m_planes[3][m_dst] = p3;
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}
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else
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{
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byte v = m_info.Mask;
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byte mask = p0;
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if ((v & 1) != 0)
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mask = (byte)~mask;
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if ((v & 2) != 0)
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mask |= (byte)~p1;
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else
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mask |= p1;
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if ((v & 4) != 0)
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mask |= (byte)~p2;
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else
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mask |= p2;
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if ((v & 8) != 0)
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mask |= (byte)~p3;
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else
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mask |= p3;
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p0 &= mask;
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p1 &= mask;
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p2 &= mask;
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p3 &= mask;
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mask = (byte)~mask;
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m_planes[0][m_dst] &= mask;
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m_planes[0][m_dst] |= p0;
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m_planes[1][m_dst] &= mask;
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m_planes[1][m_dst] |= p1;
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m_planes[2][m_dst] &= mask;
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m_planes[2][m_dst] |= p2;
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m_planes[3][m_dst] &= mask;
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m_planes[3][m_dst] |= p3;
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}
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IncrementDest();
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}
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void IncLeftToRight ()
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{
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++m_dst;
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++m_x;
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if (m_x > m_info.iWidth)
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m_x = 0;
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}
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void IncTopToBottom ()
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{
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m_dst += m_stride;
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if (m_dst >= m_plane_size)
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m_dst = ++m_x;
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}
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internal void FlattenPlanes (int src, byte[] output)
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{
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int m_dst = 0;
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for (; src < m_plane_size; ++src)
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{
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int b0 = m_planes[0][src];
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int b1 = m_planes[1][src];
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int b2 = m_planes[2][src];
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int b3 = m_planes[3][src];
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for (int j = 0; j < 8; j += 2)
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{
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byte px = (byte)((((b0 << j) & 0x80) >> 3)
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| (((b1 << j) & 0x80) >> 2)
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| (((b2 << j) & 0x80) >> 1)
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| (((b3 << j) & 0x80) ));
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px |= (byte)((((b0 << j) & 0x40) >> 6)
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| (((b1 << j) & 0x40) >> 5)
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| (((b2 << j) & 0x40) >> 4)
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| (((b3 << j) & 0x40) >> 3));
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output[m_dst++] = px;
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}
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}
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}
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BitmapPalette ReadPalette ()
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{
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const int count = 16;
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var colors = new Color[count];
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for (int i = 0; i < count; ++i)
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{
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byte g = m_input.ReadUInt8();
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byte r = m_input.ReadUInt8();
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byte b = m_input.ReadUInt8();
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colors[i] = Color.FromRgb ((byte)(r * 0x11), (byte)(g * 0x11), (byte)(b * 0x11));
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}
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return new BitmapPalette (colors);
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}
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}
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}
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