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245 lines
9.7 KiB
C#
245 lines
9.7 KiB
C#
//! \file Image.cs
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//! \date Tue Jul 01 11:29:52 2014
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//! \brief image class.
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//
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// Copyright (C) 2014 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.IO;
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using System.Linq;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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namespace GameRes
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{
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public class ImageMetaData
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{
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/// <summary>Image width in pixels.</summary>
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public uint Width { get; set; }
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/// <summary>Image height in pixels.</summary>
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public uint Height { get; set; }
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/// <summary>Horizontal coordinate of the image top left corner.</summary>
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public int OffsetX { get; set; }
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/// <summary>Vertical coordinate of the image top left corner.</summary>
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public int OffsetY { get; set; }
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/// <summary>Image bitdepth.</summary>
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public int BPP { get; set; }
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/// <summary>Image source file name, if any.</summary>
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public string FileName { get; set; }
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public int iWidth { get { return (int)Width; } }
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public int iHeight { get { return (int)Height; } }
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}
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public class ImageEntry : Entry
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{
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public override string Type { get { return "image"; } }
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}
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/// <summary>
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/// Enumeration representing possible palette serialization formats.
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/// </summary>
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public enum PaletteFormat
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{
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Rgb = 1,
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Bgr = 2,
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RgbX = 5,
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BgrX = 6,
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RgbA = 9,
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BgrA = 10,
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}
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public class ImageData
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{
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private BitmapSource m_bitmap;
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public BitmapSource Bitmap { get { return m_bitmap; } }
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public uint Width { get { return (uint)m_bitmap.PixelWidth; } }
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public uint Height { get { return (uint)m_bitmap.PixelHeight; } }
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public int OffsetX { get; set; }
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public int OffsetY { get; set; }
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public int BPP { get { return m_bitmap.Format.BitsPerPixel; } }
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public static double DefaultDpiX { get; set; }
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public static double DefaultDpiY { get; set; }
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static ImageData ()
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{
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SetDefaultDpi (96, 96);
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}
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public static void SetDefaultDpi (double x, double y)
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{
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DefaultDpiX = x;
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DefaultDpiY = y;
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}
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public ImageData (BitmapSource data, ImageMetaData meta)
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{
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m_bitmap = data;
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OffsetX = meta.OffsetX;
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OffsetY = meta.OffsetY;
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}
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public ImageData (BitmapSource data, int x = 0, int y = 0)
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{
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m_bitmap = data;
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OffsetX = x;
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OffsetY = y;
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}
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public static ImageData Create (ImageMetaData info, PixelFormat format, BitmapPalette palette,
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Array pixel_data, int stride)
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{
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var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, DefaultDpiX, DefaultDpiY,
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format, palette, pixel_data, stride);
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bitmap.Freeze();
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return new ImageData (bitmap, info);
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}
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public static ImageData Create (ImageMetaData info, PixelFormat format, BitmapPalette palette,
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Array pixel_data)
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{
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return Create (info, format, palette, pixel_data, (int)info.Width*((format.BitsPerPixel+7)/8));
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}
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public static ImageData CreateFlipped (ImageMetaData info, PixelFormat format, BitmapPalette palette,
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Array pixel_data, int stride)
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{
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var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, DefaultDpiX, DefaultDpiY,
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format, palette, pixel_data, stride);
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var flipped = new TransformedBitmap (bitmap, new ScaleTransform { ScaleY = -1 });
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flipped.Freeze();
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return new ImageData (flipped, info);
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}
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}
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public abstract class ImageFormat : IResource
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{
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public override string Type { get { return "image"; } }
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public abstract ImageMetaData ReadMetaData (IBinaryStream file);
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public abstract ImageData Read (IBinaryStream file, ImageMetaData info);
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public abstract void Write (Stream file, ImageData bitmap);
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public static ImageData Read (IBinaryStream file)
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{
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var format = FindFormat (file);
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if (null == format)
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return null;
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file.Position = 0;
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return format.Item1.Read (file, format.Item2);
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}
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public static System.Tuple<ImageFormat, ImageMetaData> FindFormat (IBinaryStream file)
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{
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foreach (var impl in FormatCatalog.Instance.FindFormats<ImageFormat> (file.Name, file.Signature))
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{
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try
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{
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file.Position = 0;
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ImageMetaData metadata = impl.ReadMetaData (file);
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if (null != metadata)
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{
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metadata.FileName = file.Name;
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return Tuple.Create (impl, metadata);
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}
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}
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catch (OperationCanceledException)
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{
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throw;
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}
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catch { }
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}
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return null;
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}
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public bool IsBuiltin
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{
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get { return this.GetType().Assembly == typeof(ImageFormat).Assembly; }
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}
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public static ImageFormat FindByTag (string tag)
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{
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return FormatCatalog.Instance.ImageFormats.FirstOrDefault (x => x.Tag == tag);
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}
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static readonly Lazy<ImageFormat> s_JpegFormat = new Lazy<ImageFormat> (() => FindByTag ("JPEG"));
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static readonly Lazy<ImageFormat> s_PngFormat = new Lazy<ImageFormat> (() => FindByTag ("PNG"));
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static readonly Lazy<ImageFormat> s_BmpFormat = new Lazy<ImageFormat> (() => FindByTag ("BMP"));
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static readonly Lazy<ImageFormat> s_TgaFormat = new Lazy<ImageFormat> (() => FindByTag ("TGA"));
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public static ImageFormat Jpeg { get { return s_JpegFormat.Value; } }
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public static ImageFormat Png { get { return s_PngFormat.Value; } }
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public static ImageFormat Bmp { get { return s_BmpFormat.Value; } }
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public static ImageFormat Tga { get { return s_TgaFormat.Value; } }
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/// <summary>
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/// Desereialize color map from <paramref name="input"/> stream, consisting of specified number of
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/// <paramref name="colors"/> stored in specified <paramref name="format"/>.
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/// Default number of colors is 256 and format is 4-byte BGRX (where X is an unsignificant byte).
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/// </summary>
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public static Color[] ReadColorMap (Stream input, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
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{
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int bpp = PaletteFormat.Rgb == format || PaletteFormat.Bgr == format ? 3 : 4;
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var palette_data = new byte[bpp * colors];
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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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int src = 0;
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var color_map = new Color[colors];
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Func<int, Color> get_color;
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if (PaletteFormat.Bgr == format || PaletteFormat.BgrX == format)
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get_color = x => Color.FromRgb (palette_data[x+2], palette_data[x+1], palette_data[x]);
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else if (PaletteFormat.BgrA == format)
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get_color = x => Color.FromArgb (palette_data[x+3], palette_data[x+2], palette_data[x+1], palette_data[x]);
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else if (PaletteFormat.RgbA == format)
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get_color = x => Color.FromArgb (palette_data[x+3], palette_data[x], palette_data[x+1], palette_data[x+2]);
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else
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get_color = x => Color.FromRgb (palette_data[x], palette_data[x+1], palette_data[x+2]);
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for (int i = 0; i < colors; ++i)
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{
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color_map[i] = get_color (src);
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src += bpp;
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}
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return color_map;
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}
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public static BitmapPalette ReadPalette (Stream input, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
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{
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return new BitmapPalette (ReadColorMap (input, colors, format));
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}
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public static BitmapPalette ReadPalette (ArcView file, long offset, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
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{
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using (var input = file.CreateStream (offset, (uint)(4 * colors))) // largest possible size for palette
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return ReadPalette (input, colors, format);
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}
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}
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}
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