GARbro-mirror/GameRes/Image.cs

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//! \file Image.cs
//! \date Tue Jul 01 11:29:52 2014
//! \brief image class.
//
// Copyright (C) 2014 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
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using System;
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using System.IO;
using System.Linq;
using System.Windows.Media;
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using System.Windows.Media.Imaging;
namespace GameRes
{
public class ImageMetaData
{
public uint Width { get; set; }
public uint Height { get; set; }
public int OffsetX { get; set; }
public int OffsetY { get; set; }
public int BPP { get; set; }
public string FileName { get; set; }
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}
public class ImageEntry : Entry
{
public override string Type { get { return "image"; } }
}
/// <summary>
/// Enumeration representing possible palette serialization formats.
/// </summary>
public enum PaletteFormat
{
Rgb = 1,
Bgr = 2,
RgbX = 5,
BgrX = 6,
RgbA = 9,
BgrA = 10,
}
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public class ImageData
{
private BitmapSource m_bitmap;
public BitmapSource Bitmap { get { return m_bitmap; } }
public uint Width { get { return (uint)m_bitmap.PixelWidth; } }
public uint Height { get { return (uint)m_bitmap.PixelHeight; } }
public int OffsetX { get; set; }
public int OffsetY { get; set; }
public int BPP { get { return m_bitmap.Format.BitsPerPixel; } }
public static double DefaultDpiX { get; set; }
public static double DefaultDpiY { get; set; }
static ImageData ()
{
SetDefaultDpi (96, 96);
}
public static void SetDefaultDpi (double x, double y)
{
DefaultDpiX = x;
DefaultDpiY = y;
}
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public ImageData (BitmapSource data, ImageMetaData meta)
{
m_bitmap = data;
OffsetX = meta.OffsetX;
OffsetY = meta.OffsetY;
}
public ImageData (BitmapSource data, int x = 0, int y = 0)
{
m_bitmap = data;
OffsetX = x;
OffsetY = y;
}
public static ImageData Create (ImageMetaData info, PixelFormat format, BitmapPalette palette,
byte[] pixel_data, int stride)
{
var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, DefaultDpiX, DefaultDpiY,
format, palette, pixel_data, stride);
bitmap.Freeze();
return new ImageData (bitmap, info);
}
public static ImageData Create (ImageMetaData info, PixelFormat format, BitmapPalette palette,
byte[] pixel_data)
{
return Create (info, format, palette, pixel_data, (int)info.Width*((format.BitsPerPixel+7)/8));
}
public static ImageData CreateFlipped (ImageMetaData info, PixelFormat format, BitmapPalette palette,
byte[] pixel_data, int stride)
{
var bitmap = BitmapSource.Create ((int)info.Width, (int)info.Height, DefaultDpiX, DefaultDpiY,
format, palette, pixel_data, stride);
var flipped = new TransformedBitmap (bitmap, new ScaleTransform { ScaleY = -1 });
flipped.Freeze();
return new ImageData (flipped, info);
}
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}
public abstract class ImageFormat : IResource
{
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);
if (null == format)
return null;
file.Position = 0;
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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{
foreach (var impl in FormatCatalog.Instance.FindFormats<ImageFormat> (file.Name, file.Signature))
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{
try
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{
file.Position = 0;
ImageMetaData metadata = impl.ReadMetaData (file);
if (null != metadata)
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{
metadata.FileName = file.Name;
return Tuple.Create (impl, metadata);
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}
}
catch (OperationCanceledException)
{
throw;
}
catch { }
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}
return null;
}
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public bool IsBuiltin
{
get { return this.GetType().Assembly == typeof(ImageFormat).Assembly; }
}
public static ImageFormat FindByTag (string tag)
{
return FormatCatalog.Instance.ImageFormats.FirstOrDefault (x => x.Tag == tag);
}
static readonly Lazy<ImageFormat> s_JpegFormat = new Lazy<ImageFormat> (() => FindByTag ("JPEG"));
static readonly Lazy<ImageFormat> s_PngFormat = new Lazy<ImageFormat> (() => FindByTag ("PNG"));
static readonly Lazy<ImageFormat> s_BmpFormat = new Lazy<ImageFormat> (() => FindByTag ("BMP"));
static readonly Lazy<ImageFormat> s_TgaFormat = new Lazy<ImageFormat> (() => FindByTag ("TGA"));
public static ImageFormat Jpeg { get { return s_JpegFormat.Value; } }
public static ImageFormat Png { get { return s_PngFormat.Value; } }
public static ImageFormat Bmp { get { return s_BmpFormat.Value; } }
public static ImageFormat Tga { get { return s_TgaFormat.Value; } }
/// <summary>
/// Desereialize color map from <paramref name="input"/> stream, consisting of specified number of
/// <paramref name="colors"/> stored in specified <paramref name="format"/>.
/// Default number of colors is 256 and format is 4-byte BGRX (where X is an unsignificant byte).
/// </summary>
public static Color[] ReadColorMap (Stream input, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
{
int bpp = PaletteFormat.Rgb == format || PaletteFormat.Bgr == format ? 3 : 4;
var palette_data = new byte[bpp * colors];
if (palette_data.Length != input.Read (palette_data, 0, palette_data.Length))
throw new EndOfStreamException();
int src = 0;
var color_map = new Color[colors];
Func<int, Color> get_color;
if (PaletteFormat.Bgr == format || PaletteFormat.BgrX == format)
get_color = x => Color.FromRgb (palette_data[x+2], palette_data[x+1], palette_data[x]);
else if (PaletteFormat.BgrA == format)
get_color = x => Color.FromArgb (palette_data[x+3], palette_data[x+2], palette_data[x+1], palette_data[x]);
else if (PaletteFormat.RgbA == format)
get_color = x => Color.FromArgb (palette_data[x+3], palette_data[x], palette_data[x+1], palette_data[x+2]);
else
get_color = x => Color.FromRgb (palette_data[x], palette_data[x+1], palette_data[x+2]);
for (int i = 0; i < colors; ++i)
{
color_map[i] = get_color (src);
src += bpp;
}
return color_map;
}
public static BitmapPalette ReadPalette (Stream input, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
{
return new BitmapPalette (ReadColorMap (input, colors, format));
}
public static BitmapPalette ReadPalette (ArcView file, long offset, int colors = 0x100, PaletteFormat format = PaletteFormat.BgrX)
{
using (var input = file.CreateStream (offset, (uint)(4 * colors))) // largest possible size for palette
return ReadPalette (input, colors, format);
}
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}
}