mirror of
https://github.com/crskycode/GARbro.git
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135 lines
5.1 KiB
C#
135 lines
5.1 KiB
C#
//! \file ImageIAR.cs
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//! \date Fri Oct 23 15:17:52 2015
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//! \brief Intermediate image format representing IAR archives entries.
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//
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// Copyright (C) 2015 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 GameRes.Utility;
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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.Sas5
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{
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internal class IarMetaData : ImageMetaData
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{
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public int Stride;
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public int PaletteSize;
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public int ImageSize;
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}
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// This is an artificial format, used by GARbro internally. structure:
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// 0x0000 'IAR\x00'
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// 0x0004 'SAS5'
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// 0x0008 Width
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// 0x000C Height
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// 0x0010 OffsetX
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// 0x0014 OffsetY
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// 0x0018 BPP
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// 0x001C Stride
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// 0x0020 PaletteSize
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// 0x0024 ImageSize
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// 0x0028 Palette [if PaletteSize > 0]
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// ...... Image data
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[Export(typeof(ImageFormat))]
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public class IarFormat : ImageFormat
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{
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public override string Tag { get { return "IAR/IMAGE"; } }
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public override string Description { get { return "SAS5 engine compressed image format"; } }
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public override uint Signature { get { return 0x00524149; } } // 'IAR'
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public IarFormat ()
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{
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Extensions = new string[] { "" };
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}
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public override ImageMetaData ReadMetaData (Stream stream)
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{
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var header = new byte[0x28];
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if (header.Length != stream.Read (header, 0, header.Length))
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return null;
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if (!Binary.AsciiEqual (header, 4, "SAS5"))
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return null;
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return new IarMetaData
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{
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Width = LittleEndian.ToUInt32 (header, 0x08),
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Height = LittleEndian.ToUInt32 (header, 0x0C),
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OffsetX = LittleEndian.ToInt32 (header, 0x10),
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OffsetY = LittleEndian.ToInt32 (header, 0x14),
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BPP = LittleEndian.ToInt32 (header, 0x18),
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Stride = LittleEndian.ToInt32 (header, 0x1C),
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PaletteSize = LittleEndian.ToInt32 (header, 0x20),
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ImageSize = LittleEndian.ToInt32 (header, 0x24),
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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 = info as IarMetaData;
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if (null == meta)
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throw new ArgumentException ("IarFormat.Read should be supplied with IarMetaData", "info");
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PixelFormat format;
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if (32 == meta.BPP)
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format = PixelFormats.Bgra32;
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else if (24 == meta.BPP)
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format = PixelFormats.Bgr24;
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else if (0 == meta.PaletteSize)
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format = PixelFormats.Gray8;
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else
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format = PixelFormats.Indexed8;
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stream.Position = 0x28;
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BitmapPalette palette = null;
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if (meta.PaletteSize > 0)
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palette = ReadPalette (stream, meta.PaletteSize);
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var pixels = new byte[meta.ImageSize];
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stream.Read (pixels, 0, pixels.Length);
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return ImageData.Create (info, format, palette, pixels, meta.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 ("IarFormat.Write not implemented");
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}
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static BitmapPalette ReadPalette (Stream input, int palette_size)
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{
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var palette_data = new byte[palette_size];
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if (palette_data.Length != input.Read (palette_data, 0, palette_data.Length))
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throw new EndOfStreamException();
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palette_size = Math.Min (0x400, palette_size);
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int color_size = palette_size / 0x100;
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var palette = new Color[0x100];
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for (int i = 0; i < palette.Length; ++i)
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{
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int c = i * color_size;
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palette[i] = Color.FromRgb (palette_data[c+2], palette_data[c+1], palette_data[c]);
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}
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return new BitmapPalette (palette);
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}
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}
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}
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