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"; } }
}
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));
}
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}
public abstract class ImageFormat : IResource
{
public override string Type { get { return "image"; } }
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public abstract ImageMetaData ReadMetaData (Stream file);
public abstract ImageData Read (Stream file, ImageMetaData info);
public abstract void Write (Stream file, ImageData bitmap);
public static ImageData Read (Stream file)
{
return Read (null, file);
}
public static ImageData Read (string filename, Stream file)
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{
bool need_dispose = false;
try
{
if (!file.CanSeek)
{
var stream = new MemoryStream();
file.CopyTo (stream);
file = stream;
need_dispose = true;
}
var format = FindFormat (file, filename);
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if (null == format)
return null;
file.Position = 0;
return format.Item1.Read (file, format.Item2);
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}
finally
{
if (need_dispose)
file.Dispose();
}
}
public static System.Tuple<ImageFormat, ImageMetaData> FindFormat (Stream file, string filename = null)
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{
uint signature = FormatCatalog.ReadSignature (file);
Lazy<string> ext = null;
if (!string.IsNullOrEmpty (filename))
ext = new Lazy<string> (() => Path.GetExtension (filename).TrimStart ('.').ToLowerInvariant());
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for (;;)
{
var range = FormatCatalog.Instance.LookupSignature<ImageFormat> (signature);
// check formats that match filename extension first
if (ext != null && range.Skip(1).Any())
range = range.OrderByDescending (f => f.Extensions.Any (e => e == ext.Value));
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foreach (var impl in range)
{
try
{
file.Position = 0;
ImageMetaData metadata = impl.ReadMetaData (file);
if (null != metadata)
{
metadata.FileName = filename;
return Tuple.Create (impl, metadata);
}
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}
catch { }
}
if (0 == signature)
break;
signature = 0;
}
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"));
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; } }
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}
}