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330 lines
13 KiB
C#
330 lines
13 KiB
C#
//! \file ImageGRX.cs
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//! \date Wed Jul 15 00:59:44 2015
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//! \brief U-Me Soft image format.
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//
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// Copyright (C) 2015-2016 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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using System.Windows.Media;
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using GameRes.Utility;
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namespace GameRes.Formats.UMeSoft
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{
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internal class GrxMetaData : ImageMetaData
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{
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public bool IsPacked;
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public bool HasAlpha;
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public int AlphaOffset;
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}
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[Export(typeof(ImageFormat))]
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public class GrxFormat : ImageFormat
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{
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public override string Tag { get { return "GRX"; } }
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public override string Description { get { return "U-Me Soft image format"; } }
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public override uint Signature { get { return 0x1A585247; } } // 'GRX'
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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byte[] header = new byte[0x10];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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return new GrxMetaData
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{
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Width = LittleEndian.ToUInt16 (header, 8),
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Height = LittleEndian.ToUInt16 (header, 10),
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BPP = LittleEndian.ToUInt16 (header, 6),
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IsPacked = 0 != header[4],
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HasAlpha = 0 != header[5],
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AlphaOffset = LittleEndian.ToInt32 (header, 12),
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};
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var reader = new Reader (stream, (GrxMetaData)info);
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reader.Unpack();
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return ImageData.Create (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 ("GrxFormat.Write not implemented");
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}
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internal class Reader
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{
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Stream m_input;
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byte[] m_output;
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GrxMetaData m_info;
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int m_pixel_size;
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int m_aligned_width;
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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 Reader (Stream input, GrxMetaData info)
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{
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m_input = input;
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m_info = info;
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m_pixel_size = m_info.BPP / 8;
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switch (m_info.BPP)
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{
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case 32:
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Format = PixelFormats.Bgr32;
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break;
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case 24:
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Format = PixelFormats.Bgr32;
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m_pixel_size = 4;
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break;
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case 16:
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Format = PixelFormats.Bgr565;
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break;
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case 8:
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Format = PixelFormats.Gray8;
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break;
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default:
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throw new InvalidFormatException();
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}
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m_aligned_width = ((int)m_info.Width + 3) & ~3;
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Stride = m_aligned_width * m_pixel_size;
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m_output = new byte[Stride * (int)info.Height];
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}
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public void Unpack ()
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{
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m_input.Position = 0x10;
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if (!m_info.IsPacked)
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m_input.Read (m_output, 0, m_output.Length);
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else
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UnpackColorData (m_output, m_info.BPP/8, m_pixel_size);
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if (m_info.HasAlpha && m_info.AlphaOffset > 0)
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{
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m_input.Position = 0x10 + m_info.AlphaOffset;
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var alpha = new byte[m_aligned_width * (int)m_info.Height];
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UnpackColorData (alpha, 1, 1);
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if (m_info.BPP >= 24)
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{
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int dst = 3;
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int src = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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{
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for (int x = 0; x < m_aligned_width; ++x)
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{
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m_output[dst] = alpha[src++];
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dst += 4;
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}
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}
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Format = PixelFormats.Bgra32;
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}
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else if (16 == m_info.BPP)
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ApplyAlpha16bpp (alpha);
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}
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}
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void ApplyAlpha16bpp (byte[] alpha)
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{
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int dst_stride = m_aligned_width * 4;
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var pixels = new byte[dst_stride * (int)m_info.Height];
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int src = 0;
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int dst = 0;
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int gap = dst_stride - (int)m_info.Width * 4;
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int a = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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{
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for (int x = 0; x < m_info.Width; ++x)
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{
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int pixel = LittleEndian.ToUInt16 (m_output, src + x*2);
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pixels[dst++] = (byte)((pixel & 0x001F) * 0xFF / 0x001F);
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pixels[dst++] = (byte)((pixel & 0x07E0) * 0xFF / 0x07E0);
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pixels[dst++] = (byte)((pixel & 0xF800) * 0xFF / 0xF800);
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pixels[dst++] = alpha[a+x];
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}
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dst += gap;
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src += Stride;
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a += m_aligned_width;
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}
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m_pixel_size = 4;
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Stride = dst_stride;
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m_output = pixels;
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Format = PixelFormats.Bgra32;
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}
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static readonly int[,] OffsetTable = new int[2,16] {
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{ 0, -1, -1, -1, 0, -2, -2, -2, 0, -4, -4, -4, -2, -2, -4, -4 },
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{ 0, 0, -1, 1, -2, 0, -2, 2, -4, 0, -4, 4, -4, 4, -2, 2 },
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};
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void UnpackColorData (byte[] output, int src_pixel_size, int dst_pixel_size)
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{
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int[] offset_step = new int[16];
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int stride = ((int)m_info.Width * dst_pixel_size + 3) & ~3;
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int delta = stride - (int)m_info.Width * dst_pixel_size;
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for (int i = 0; i < 16; i++)
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offset_step[i] = OffsetTable[0,i] * stride + OffsetTable[1,i] * dst_pixel_size;
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int dst = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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{
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int w = (int)m_info.Width;
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while (w > 0)
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{
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int flag = m_input.ReadByte();
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if (-1 == flag)
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throw new InvalidFormatException();
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int count = flag & 3;
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if (0 != (flag & 4))
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{
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count |= m_input.ReadByte() << 2;
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}
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w -= ++count;
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if (0 == (flag & 0xF0))
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{
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if (0 != (flag & 8))
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{
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if (src_pixel_size == dst_pixel_size)
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{
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count *= dst_pixel_size;
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if (count != m_input.Read (output, dst, count))
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throw new InvalidFormatException();
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dst += count;
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}
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else
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{
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for (int i = 0; i < count; ++i)
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{
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if (src_pixel_size != m_input.Read (output, dst, src_pixel_size))
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throw new InvalidFormatException();
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dst += dst_pixel_size;
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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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if (src_pixel_size != m_input.Read (output, dst, src_pixel_size))
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throw new InvalidFormatException();
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--count;
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dst += dst_pixel_size;
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for (int i = count*dst_pixel_size; i > 0; i--)
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{
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output[dst] = output[dst-dst_pixel_size];
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dst++;
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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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int src = dst + offset_step[flag >> 4];
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if (0 == (flag & 8))
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{
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for (int i = 0; i < count; i++)
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{
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for (int j = 0; j < src_pixel_size; ++j)
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output[dst+j] = output[src+j];
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dst += dst_pixel_size;
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}
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}
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else
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{
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count *= dst_pixel_size;
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Binary.CopyOverlapped (output, src, dst, count);
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dst += count;
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}
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}
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}
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dst += delta;
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}
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}
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}
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}
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// SGX header format
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// signature 32bit
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// GRX offset 32bit
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// number of frames 32bit
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// ... frames info (* number of frames)
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// x coordinate 16bit
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// y coordinate 16bit
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// frame width 16bit
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// frame height 16bit
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// transparency color 32bit
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internal class SgxMetaData : ImageMetaData
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{
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public int GrxOffset;
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public ImageMetaData GrxInfo;
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}
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[Export(typeof(ImageFormat))]
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public class SgxFormat : GrxFormat
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{
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public override string Tag { get { return "SGX"; } }
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public override string Description { get { return "U-Me Soft multi-frame image format"; } }
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public override uint Signature { get { return 0x1A584753; } } // 'SGX'
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public SgxFormat ()
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{
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Extensions = new string[] { "grx" };
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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using (var reader = new ArcView.Reader (stream))
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{
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stream.Seek (4, SeekOrigin.Current);
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int offset = reader.ReadInt32();
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if (offset <= 8)
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return null;
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stream.Position = offset;
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uint signature = reader.ReadUInt32();
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if (signature != base.Signature)
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return null;
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stream.Seek (-4, SeekOrigin.Current);
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var info = base.ReadMetaData (stream) as GrxMetaData;
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if (null == info)
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return null;
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return new SgxMetaData
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{
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Width = info.Width,
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Height = info.Height,
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BPP = info.BPP,
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GrxOffset = offset,
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GrxInfo = info
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};
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}
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}
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = (SgxMetaData)info;
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using (var grx = new StreamRegion (stream, meta.GrxOffset, true))
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return base.Read (grx, meta.GrxInfo);
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}
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}
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}
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