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113 lines
4.5 KiB
C#
113 lines
4.5 KiB
C#
//! \file ImageBGD.cs
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//! \date Mon Jan 16 06:43:56 2017
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//! \brief 'Game System' background image format.
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//
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// Copyright (C) 2017 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.ComponentModel.Composition;
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using System.IO;
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using System.Windows.Media;
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namespace GameRes.Formats.GameSystem
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{
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[Export(typeof(ImageFormat))]
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public class BgdFormat : ImageFormat
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{
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public override string Tag { get { return "BGD"; } }
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public override string Description { get { return "'GameSystem' background image format"; } }
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public override uint Signature { get { return 0; } }
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public override ImageMetaData ReadMetaData (IBinaryStream file)
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{
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if (file.Signature+0x10 != file.Length)
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return null;
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var header = file.ReadHeader (0x10);
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uint width = header.ToUInt32 (4);
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uint height = header.ToUInt32 (8);
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if (0 == width || width > 0x8000 || 0 == height || height > 0x8000)
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return null;
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return new ImageMetaData
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{
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Width = width,
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Height = height,
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BPP = 24,
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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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int total_pixels = (int)info.Width * (int)info.Height;
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var pixels = new byte[total_pixels * 3];
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int count = total_pixels >> 1;
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int dst = 0;
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int s1 = 1, s2 = 1, s3 = 1;
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int r = 0, g = 0, b = 0;
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file.Position = 0x10;
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for (int i = 0; i < count; ++i)
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{
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int c = file.ReadInt24();
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s1 = s1 << 4 | c & 0xF;
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s2 = s2 << 4 | (c >> 4) & 0xF;
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s3 = s3 << 4 | (c >> 8) & 0xF;
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b += RgbShift[s1];
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g += RgbShift[s2];
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r += RgbShift[s3];
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pixels[dst++] = (byte)b;
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pixels[dst++] = (byte)g;
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pixels[dst++] = (byte)r;
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s1 = ShiftTable[s1] << 4 | (c >> 16) & 0xF;
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s2 = ShiftTable[s2] << 4 | (c >> 20) & 0xF;
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s3 = ShiftTable[s3] << 4 | (c >> 12) & 0xF;
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b += RgbShift[s1];
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g += RgbShift[s2];
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r += RgbShift[s3];
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pixels[dst++] = (byte)b;
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pixels[dst++] = (byte)g;
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pixels[dst++] = (byte)r;
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s1 = ShiftTable[s1];
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s2 = ShiftTable[s2];
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s3 = ShiftTable[s3];
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}
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return ImageData.CreateFlipped (info, PixelFormats.Bgr24, null, pixels, (int)info.Width*3);
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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 ("BgdFormat.Write not implemented");
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}
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static readonly byte[] ShiftTable = {
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0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1,
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0, 0, 1, 1, 2, 2, 1, 1, 0, 0, 1, 1, 2, 2, 1, 1,
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1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1,
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};
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static readonly short[] RgbShift = {
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1, 2, 4, 8, 0x10, 0x26, 0x50, 0xAA,
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-1, -2, -4, -8, -0x10, -0x26, -0x50, -0xAA,
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2, 4, 6, 0x0C, 0x18, 0x30, 0x60, 0xC0,
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-2, -4, -6, -0x0C, -0x18, -0x30, -0x60, -0xC0,
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5, 0x0A, 0x14, 0x1E, 0x32, 0x50, 0x82, 0xD2,
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-5, -0x0A, -0x14, -0x1E, -0x32, -0x50, -0x82, -0xD2,
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};
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}
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}
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