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92 lines
3.5 KiB
C#
92 lines
3.5 KiB
C#
//! \file ImageIMA.cs
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//! \date 2019 Mar 02
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//! \brief Hill Field script system image with alpha channel.
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//
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// Copyright (C) 2019 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.HillField
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{
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internal class ImaMetaData : ImageMetaData
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{
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public uint AlphaOffset;
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}
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[Export(typeof(ImageFormat))]
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public class ImaFormat : ImageFormat
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{
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public override string Tag { get { return "IMA"; } }
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public override string Description { get { return "Hill Field script system 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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var header = file.ReadHeader (0x10);
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if (header.ToInt32 (0) != 0)
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return null;
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uint rgb_size = header.ToUInt32 (4);
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uint width = header.ToUInt32 (8);
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uint height = header.ToUInt32 (12);
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uint plane_size = width * height;
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uint bitmap_size = plane_size * 3;
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if (plane_size == 0 || bitmap_size > rgb_size || file.Length - rgb_size - 8 < plane_size)
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return null;
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return new ImaMetaData {
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Width = width, Height = height, BPP = 32,
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AlphaOffset = 8 + rgb_size,
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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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var meta = (ImaMetaData)info;
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file.Position = 0x10;
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int plane_size = meta.iWidth * meta.iHeight;
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var rgb = file.ReadBytes (plane_size * 3);
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file.Position = meta.AlphaOffset;
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var alpha = file.ReadBytes (plane_size);
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int stride = meta.iWidth * 4;
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var pixels = new byte[stride * meta.iHeight];
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int dst = 0;
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int src = 0;
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int asrc = 0;
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while (dst < pixels.Length)
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{
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pixels[dst++] = rgb[src++];
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pixels[dst++] = rgb[src++];
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pixels[dst++] = rgb[src++];
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pixels[dst++] = (byte)~alpha[asrc++];
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}
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return ImageData.CreateFlipped (info, PixelFormats.Bgra32, null, pixels, 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 ("ImaFormat.Write not implemented");
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}
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}
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}
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