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351 lines
14 KiB
C#
351 lines
14 KiB
C#
//! \file ImageDCF.cs
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//! \date Fri Jul 29 14:07:15 2016
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//! \brief AliceSoft incremental image format.
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//
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// Copyright (C) 2016-2022 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.Diagnostics;
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using System.IO;
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using System.Text;
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using System.Windows.Media;
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using GameRes.Compression;
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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 DcfMetaData : ImageMetaData
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{
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public string BaseName;
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public long DataOffset;
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public bool IsPcf;
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}
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internal interface IBaseImageReader
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{
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int BPP { get; }
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byte[] Data { get; }
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void Unpack ();
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}
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[Export(typeof(ImageFormat))]
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public class DcfFormat : ImageFormat
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{
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public override string Tag { get { return "DCF"; } }
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public override string Description { get { return "AliceSoft System incremental image"; } }
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public override uint Signature { get { return 0x20666364; } } // 'dcf '
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public DcfFormat ()
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{
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Extensions = new[] { "dcf", "pcf" };
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Signatures = new[] { 0x20666364u, 0x20666370u };
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}
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static readonly ResourceInstance<AfaOpener> Afa = new ResourceInstance<AfaOpener> ("AFA");
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x1C);
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uint header_size = header.ToUInt32 (4);
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long data_pos = 8 + header_size;
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if (header.ToInt32 (8) != 1)
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return null;
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uint width = header.ToUInt32 (0x0C);
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uint height = header.ToUInt32 (0x10);
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int bpp = header.ToInt32 (0x14);
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int name_length = header.ToInt32 (0x18);
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if (name_length <= 0)
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return null;
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int shift = (name_length % 7) + 1;
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var name_bits = stream.ReadBytes (name_length);
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for (int i = 0; i < name_length; ++i)
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{
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name_bits[i] = Binary.RotByteL (name_bits[i], shift);
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}
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return new DcfMetaData
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{
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Width = width,
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Height = height,
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BPP = bpp,
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BaseName = Afa.Value.NameEncoding.GetString (name_bits),
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DataOffset = data_pos,
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IsPcf = stream.Signature == 0x20666370u,
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};
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}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
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var reader = new DcfReader (stream, (DcfMetaData)info);
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reader.Unpack();
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return ImageData.Create (reader.Info, reader.Format, null, reader.Data, reader.Stride);
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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 ("DcfFormat.Write not implemented");
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}
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}
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internal sealed class DcfReader : IBaseImageReader
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{
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IBinaryStream m_input;
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DcfMetaData m_info;
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byte[] m_output;
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byte[] m_mask = null;
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byte[] m_base = null;
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int m_overlay_bpp;
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int m_base_bpp;
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static readonly ResourceInstance<ImageFormat> s_QntFormat = new ResourceInstance<ImageFormat> ("QNT");
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static readonly ResourceInstance<ImageFormat> s_DcfFormat = new ResourceInstance<ImageFormat> ("DCF");
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internal ImageFormat Qnt { get { return s_QntFormat.Value; } }
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internal ImageFormat Dcf { get { return s_DcfFormat.Value; } }
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public int BPP { get { return m_base_bpp; } }
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public ImageMetaData Info { get; private set; }
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public byte[] Data { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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public int Stride { get; private set; }
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public DcfReader (IBinaryStream input, DcfMetaData info)
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{
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m_input = input;
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m_info = info;
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Info = info;
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}
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public void Unpack ()
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{
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int pt_x = 0;
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int pt_y = 0;
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long next_pos = m_info.DataOffset;
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for (;;)
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{
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m_input.Position = next_pos;
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uint id = m_input.ReadUInt32();
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next_pos += 8 + m_input.ReadUInt32();
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if (0x6C646664 == id) // 'dfdl'
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{
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int unpacked_size = m_input.ReadInt32();
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if (unpacked_size <= 0)
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continue;
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m_mask = new byte[unpacked_size];
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using (var input = new ZLibStream (m_input.AsStream, CompressionMode.Decompress, true))
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input.Read (m_mask, 0, unpacked_size);
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}
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else if (0x6C647470 == id) // 'ptdl'
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{
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pt_x = m_input.ReadInt32();
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pt_y = m_input.ReadInt32();
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}
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else if (0x64676364 == id || 0x64676370 == id) // 'dcgd' || 'pcgd'
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break;
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}
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long qnt_pos = m_input.Position;
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if (m_input.ReadUInt32() != Qnt.Signature)
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throw new InvalidFormatException();
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using (var reg = new StreamRegion (m_input.AsStream, qnt_pos, true))
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using (var qnt = new BinaryStream (reg, m_input.Name))
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{
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var qnt_info = Qnt.ReadMetaData (qnt) as QntMetaData;
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if (null == qnt_info)
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throw new InvalidFormatException();
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var overlay = new QntFormat.Reader (reg, qnt_info);
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overlay.Unpack();
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m_overlay_bpp = overlay.BPP;
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if (m_mask != null || m_info.IsPcf)
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ReadBaseImage();
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if (m_info.IsPcf)
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{
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if (null == m_base)
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SetEmptyBase();
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qnt_info.OffsetX = pt_x;
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qnt_info.OffsetY = pt_y;
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BlendOverlay (qnt_info, overlay.Data);
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m_output = m_base;
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SetFormat (m_info.iWidth, m_base_bpp);
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}
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else if (m_base != null)
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{
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m_output = MaskOverlay (overlay.Data);
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SetFormat (m_info.iWidth, m_overlay_bpp);
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}
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else
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{
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m_output = overlay.Data;
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SetFormat (qnt_info.iWidth, m_overlay_bpp);
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}
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}
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}
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void SetFormat (int width, int bpp)
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{
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Format = 24 == bpp ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
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Stride = width * (bpp / 8);
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}
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void SetEmptyBase ()
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{
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m_base_bpp = 32;
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m_base = new byte[m_info.Width * m_info.Height * 4];
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}
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byte[] MaskOverlay (byte[] overlay)
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{
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int blocks_x = m_info.iWidth / 0x10;
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int blocks_y = m_info.iHeight / 0x10;
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int base_step = m_base_bpp / 8;
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int overlay_step = m_overlay_bpp / 8;
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int base_stride = m_info.iWidth * base_step;
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int overlay_stride = m_info.iWidth * overlay_step;
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int mask_pos = 4;
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for (int y = 0; y < blocks_y; ++y)
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{
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int base_pos = y * 0x10 * base_stride;
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int dst_pos = y * 0x10 * overlay_stride;
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for (int x = 0; x < blocks_x; ++x)
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{
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if (0 == m_mask[mask_pos++])
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continue;
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for (int by = 0; by < 0x10; ++by)
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{
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int src = base_pos + by * base_stride + x * 0x10 * base_step;
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int dst = dst_pos + by * overlay_stride + x * 0x10 * overlay_step;
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for (int bx = 0; bx < 0x10; ++bx)
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{
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overlay[dst ] = m_base[src ];
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overlay[dst+1] = m_base[src+1];
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overlay[dst+2] = m_base[src+2];
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if (4 == overlay_step)
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{
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overlay[dst+3] = 4 == base_step ? m_base[src+3] : (byte)0xFF;
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}
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src += base_step;
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dst += overlay_step;
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}
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}
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}
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}
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return overlay;
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}
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void BlendOverlay (ImageMetaData overlay_info, byte[] overlay)
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{
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int ovl_x = overlay_info.OffsetX;
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int ovl_y = overlay_info.OffsetY;
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int ovl_width = overlay_info.iWidth;
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int ovl_height = overlay_info.iHeight;
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int base_width = m_info.iWidth;
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int base_height = m_info.iHeight;
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if (checked(ovl_x + ovl_width) > base_width)
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ovl_width = base_width - ovl_x;
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if (checked(ovl_y + ovl_height) > base_height)
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ovl_height = base_height - ovl_y;
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if (ovl_height <= 0 || ovl_width <= 0)
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return;
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int dst_stride = m_info.iWidth * 4;
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int src_stride = overlay_info.iWidth * 4;
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int dst = ovl_y * dst_stride + ovl_x * 4;
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int src = 0;
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int gap = dst_stride - src_stride;
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for (int y = 0; y < overlay_info.iHeight; ++y)
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{
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for (int x = 0; x < overlay_info.iWidth; ++x)
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{
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byte src_alpha = overlay[src+3];
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if (src_alpha != 0)
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{
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if (0xFF == src_alpha || 0 == m_base[dst+3])
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{
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m_base[dst] = overlay[src];
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m_base[dst+1] = overlay[src+1];
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m_base[dst+2] = overlay[src+2];
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m_base[dst+3] = src_alpha;
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}
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else
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{
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m_base[dst+0] = (byte)((overlay[src+0] * src_alpha
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+ m_base[dst+0] * (0xFF - src_alpha)) / 0xFF);
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m_base[dst+1] = (byte)((overlay[src+1] * src_alpha
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+ m_base[dst+1] * (0xFF - src_alpha)) / 0xFF);
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m_base[dst+2] = (byte)((overlay[src+2] * src_alpha
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+ m_base[dst+2] * (0xFF - src_alpha)) / 0xFF);
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m_base[dst+3] = (byte)Math.Max (src_alpha, m_base[dst+3]);
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}
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}
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dst += 4;
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src += 4;
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}
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dst += gap;
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}
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}
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void ReadBaseImage ()
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{
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try
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{
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string dir_name = VFS.GetDirectoryName (m_info.FileName);
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string base_name = Path.ChangeExtension (m_info.BaseName, "qnt");
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base_name = VFS.CombinePath (dir_name, base_name);
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ImageFormat base_format = null;
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Func<IBinaryStream, ImageMetaData, IBaseImageReader> create_reader;
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if (VFS.FileExists (base_name))
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{
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base_format = Qnt;
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create_reader = (s, m) => new QntFormat.Reader (s.AsStream, (QntMetaData)m);
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}
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else
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{
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base_name = Path.ChangeExtension (m_info.BaseName, "pcf");
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if (VFS.IsPathEqualsToFileName (m_info.FileName, base_name))
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return;
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base_name = VFS.CombinePath (dir_name, base_name);
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base_format = Dcf;
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create_reader = (s, m) => new DcfReader (s, (DcfMetaData)m);
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}
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using (var base_file = VFS.OpenBinaryStream (base_name))
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{
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var base_info = base_format.ReadMetaData (base_file);
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if (null != base_info && m_info.Width == base_info.Width && m_info.Height == base_info.Height)
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{
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base_info.FileName = base_name;
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var reader = create_reader (base_file, base_info);
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reader.Unpack();
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m_base_bpp = reader.BPP;
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m_base = reader.Data;
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}
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}
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}
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catch (Exception X)
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{
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Trace.WriteLine (X.Message, "[DCF]");
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}
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}
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}
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}
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