mirror of
https://github.com/crskycode/GARbro.git
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269 lines
8.8 KiB
C#
269 lines
8.8 KiB
C#
//! \file ImageTINK.cs
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//! \date Fri Jun 17 18:49:04 2016
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//! \brief Tinker Bell encrypted image file.
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//
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// Copyright (C) 2016 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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namespace GameRes.Formats.Cyberworks
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{
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public enum AImageHeader
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{
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Flags = 0,
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Field1 = 1,
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Field2 = 2,
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Height = 3,
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Width = 4,
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UnpackedSize = 5,
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AlphaSize = 6,
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BitsSize = 7,
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Ignored = Field1,
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}
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internal sealed class AImageReader : IDisposable
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{
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public readonly ImageMetaData Info = new ImageMetaData();
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BinaryReader m_input;
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byte[] m_output;
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AImageScheme m_scheme;
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public byte[] Data { get { return m_output; } }
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public AImageReader (Stream input, AImageScheme scheme)
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{
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m_input = new ArcView.Reader (input);
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m_scheme = scheme;
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}
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public void Unpack ()
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{
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int header_length = Math.Max (8, m_scheme.HeaderOrder.Length);
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var header = new int[header_length];
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for (int i = 0; i < m_scheme.HeaderOrder.Length; ++i)
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{
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int b = GetInt();
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header[m_scheme.HeaderOrder[i]] = b;
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}
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Info.Width = (uint)header[4];
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Info.Height = (uint)header[3];
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if (0 == Info.Width || Info.Width >= 0x8000 || 0 == Info.Height || Info.Height >= 0x8000)
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throw new InvalidFormatException();
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int unpacked_size = header[5];
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if (unpacked_size <= 0)
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throw new InvalidFormatException();
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int flags = header[0];
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int bits_size = header[7];
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int data_offset = bits_size * 2;
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if (0 == flags)
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CopyV0 (unpacked_size);
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else if (2 == (flags & 6))
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UnpackV2 (bits_size, data_offset);
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else if (6 == (flags & 6))
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{
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if (0 == bits_size)
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CopyV6 (unpacked_size, header[6]);
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else
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UnpackV6 (bits_size, data_offset, data_offset + header[6]);
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}
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else
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throw new InvalidFormatException();
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}
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void CopyV0 (int data_size)
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{
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int plane_size = (int)Info.Width * (int)Info.Height;
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if (plane_size == data_size)
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{
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Info.BPP = 8;
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m_output = m_input.ReadBytes (data_size);
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}
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else if (3 * plane_size == data_size)
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{
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Info.BPP = 24;
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m_output = m_input.ReadBytes (data_size);
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}
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else if (4 * plane_size == data_size)
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{
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Info.BPP = 32;
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m_output = m_input.ReadBytes (data_size);
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}
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else
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{
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Info.BPP = 24;
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int dst_stride = (int)Info.Width * 3;
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int src_stride = (dst_stride + 3) & ~3;
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if (src_stride * (int)Info.Height != data_size)
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throw new InvalidFormatException();
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m_output = new byte[dst_stride * (int)Info.Height];
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var gap = new byte[src_stride-dst_stride];
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int dst = 0;
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for (uint y = 0; y < Info.Height; ++y)
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{
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m_input.Read (m_output, dst, dst_stride);
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m_input.Read (gap, 0, gap.Length);
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dst += dst_stride;
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}
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}
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}
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void UnpackV2 (int offset1, int rgb_offset)
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{
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Info.BPP = 24;
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var rgb_map = m_input.ReadBytes (offset1);
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var alpha_map = m_input.ReadBytes (rgb_offset-offset1);
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int plane_size = (int)Info.Width * (int)Info.Height;
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m_output = new byte[plane_size * 3];
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int bit = 1;
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int bit_src = 0;
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int dst = 0;
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for (int i = 0; i < plane_size; ++i)
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{
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if ((bit & alpha_map[bit_src]) == 0 && (bit & rgb_map[bit_src]) != 0)
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{
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m_input.Read (m_output, dst, 3);
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}
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dst += 3;
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if (0x80 == bit)
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{
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++bit_src;
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bit = 1;
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}
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else
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bit <<= 1;
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}
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}
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void CopyV6 (int alpha_size, int rgb_size)
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{
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Info.BPP = 32;
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int plane_size = (int)Info.Width * (int)Info.Height;
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m_output = new byte[plane_size * 4];
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int stride = ((int)Info.Width * 3 + 3) & ~3;
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var line = new byte[stride];
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int dst = 3;
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for (uint y = 0; y < Info.Height; ++y)
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{
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m_input.Read (line, 0, stride);
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int src = 0;
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for (uint x = 0; x < Info.Width; ++x)
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{
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m_output[dst] = line[src];
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dst += 4;
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src += 3;
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}
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}
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dst = 0;
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for (uint y = 0; y < Info.Height; ++y)
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{
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m_input.Read (line, 0, stride);
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int src = 0;
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for (uint x = 0; x < Info.Width; ++x)
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{
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m_output[dst ] = line[src++];
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m_output[dst+1] = line[src++];
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m_output[dst+2] = line[src++];
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dst += 4;
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}
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}
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}
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void UnpackV6 (int offset1, int alpha_offset, int rgb_offset)
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{
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Info.BPP = 32;
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var rgb_map = m_input.ReadBytes (offset1);
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var alpha_map = m_input.ReadBytes (alpha_offset - offset1);
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var alpha = m_input.ReadBytes (rgb_offset - alpha_offset);
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int plane_size = (int)Info.Width * (int)Info.Height;
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m_output = new byte[plane_size * 4];
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int bit = 1;
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int bit_src = 0;
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int alpha_src = 0;
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int dst = 0;
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for (int i = 0; i < plane_size; ++i)
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{
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bool has_alpha = (bit & alpha_map[bit_src]) != 0;
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if (has_alpha || (bit & rgb_map[bit_src]) != 0)
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{
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m_input.Read (m_output, dst, 3);
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if (has_alpha && alpha_src < alpha.Length)
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{
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m_output[dst+3] = alpha[alpha_src];
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alpha_src += 3;
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}
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else
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m_output[dst+3] = 0xFF;
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}
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dst += 4;
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if (0x80 == bit)
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{
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++bit_src;
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bit = 1;
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}
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else
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bit <<= 1;
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}
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}
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int GetInt ()
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{
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byte a = m_input.ReadByte();
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if (a == m_scheme.Value3)
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a = 0;
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int d = 0;
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int c = 0;
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for (;;)
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{
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byte a1 = m_input.ReadByte();
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if (a1 == m_scheme.Value2)
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break;
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if (a1 != m_scheme.Value1)
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{
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c = (a1 == m_scheme.Value3) ? 0 : a1;
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}
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else
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{
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++d;
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}
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}
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return a + (c + d * m_scheme.Value1) * m_scheme.Value1;
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}
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#region IDisposable Members
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bool _disposed = false;
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public void Dispose ()
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{
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if (!_disposed)
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{
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m_input.Dispose();
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_disposed = true;
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}
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}
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#endregion
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}
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}
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