461 lines
14 KiB
C#
461 lines
14 KiB
C#
using System;
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using System.ComponentModel;
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using System.IO;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Runtime.Versioning;
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using System.Security.Permissions;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Interop;
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using System.Windows.Media;
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using System.Windows.Media.Imaging;
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using System.Windows.Resources;
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using HandyControl.Data;
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using HandyControl.Tools;
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namespace HandyControl.Controls
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{
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public class GifImage : Image, IDisposable
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{
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private static readonly Guid GifGuid = new Guid("{b96b3caa-0728-11d3-9d7b-0000f81ef32e}");
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internal IntPtr NativeImage;
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private byte[] _rawData;
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private bool _isStart;
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private bool _isLoaded;
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static GifImage()
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{
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VisibilityProperty.OverrideMetadata(typeof(GifImage), new PropertyMetadata(default(Visibility), OnVisibilityChanged));
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}
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private static void OnVisibilityChanged(DependencyObject s, DependencyPropertyChangedEventArgs e)
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{
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var ctl = (GifImage)s;
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var v = (Visibility)e.NewValue;
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if (v != Visibility.Visible)
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{
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ctl.StopAnimate();
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}
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else if (!ctl._isStart)
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{
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ctl.StartAnimate();
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}
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}
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~GifImage() => Dispose(false);
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public GifImage()
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{
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Loaded += (s, e) =>
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{
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if (DesignerProperties.GetIsInDesignMode(this)) return;
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if (_isLoaded) return;
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_isLoaded = true;
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if (Source is BitmapImage image)
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{
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var uri = image.UriSource;
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GetGifStreamFromPack(uri);
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StartAnimate();
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}
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};
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}
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public GifImage(string filename)
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{
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Source = null;
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CreateSourceFromFile(filename);
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StartAnimate();
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}
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public GifImage(Stream stream)
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{
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Source = null;
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CreateSourceFromStream(stream);
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StartAnimate();
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}
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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protected virtual void Dispose(bool disposing)
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{
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if (NativeImage == IntPtr.Zero) return;
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try
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{
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StopAnimate();
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ExternDllHelper.Gdip.GdipDisposeImage(new HandleRef(this, NativeImage));
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}
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catch
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{
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// ignored
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}
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finally
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{
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NativeImage = IntPtr.Zero;
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}
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}
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private void CreateSourceFromFile(string filename)
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{
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filename = Path.GetFullPath(filename);
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var status = ExternDllHelper.Gdip.GdipCreateBitmapFromFile(filename, out var bitmap);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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status = ExternDllHelper.Gdip.GdipImageForceValidation(new HandleRef(null, bitmap));
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if (status != ExternDllHelper.Gdip.Ok)
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{
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ExternDllHelper.Gdip.GdipDisposeImage(new HandleRef(null, bitmap));
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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SetNativeImage(bitmap);
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EnsureSave(this, filename, null);
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}
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private void CreateSourceFromStream(Stream stream)
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{
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if (stream == null)
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throw new ArgumentException("stream null");
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var status = ExternDllHelper.Gdip.GdipCreateBitmapFromStream(new GPStream(stream), out var bitmap);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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status = ExternDllHelper.Gdip.GdipImageForceValidation(new HandleRef(null, bitmap));
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if (status != ExternDllHelper.Gdip.Ok)
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{
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ExternDllHelper.Gdip.GdipDisposeImage(new HandleRef(null, bitmap));
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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SetNativeImage(bitmap);
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EnsureSave(this, null, stream);
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}
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private void GetGifStreamFromPack(Uri uri)
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{
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try
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{
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StreamResourceInfo streamInfo;
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if (!uri.IsAbsoluteUri)
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{
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streamInfo = Application.GetContentStream(uri) ?? Application.GetResourceStream(uri);
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}
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else
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{
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if (uri.GetLeftPart(UriPartial.Authority).Contains("siteoforigin"))
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{
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streamInfo = Application.GetRemoteStream(uri);
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}
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else
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{
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streamInfo = Application.GetContentStream(uri) ?? Application.GetResourceStream(uri);
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}
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}
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if (streamInfo == null)
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throw new FileNotFoundException("Resource not found.", uri.ToString());
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CreateSourceFromStream(streamInfo.Stream);
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}
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catch
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{
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// ignored
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}
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}
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[ResourceExposure(ResourceScope.None)]
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[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
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internal static void EnsureSave(GifImage image, string filename, Stream dataStream)
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{
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if (!image.RawGuid.Equals(GifGuid)) return;
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var animatedGif = false;
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var dimensions = image.FrameDimensionsList;
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if (dimensions.Select(guid => new GifFrameDimension(guid)).Contains(GifFrameDimension.Time))
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{
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animatedGif = image.GetFrameCount(GifFrameDimension.Time) > 1;
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}
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if (!animatedGif) return;
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try
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{
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Stream created = null;
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long lastPos = 0;
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if (dataStream != null)
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{
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lastPos = dataStream.Position;
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dataStream.Position = 0;
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}
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try
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{
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if (dataStream == null)
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{
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created = dataStream = File.OpenRead(filename);
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}
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image._rawData = new byte[(int)dataStream.Length];
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dataStream.Read(image._rawData, 0, (int)dataStream.Length);
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}
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finally
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{
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if (created != null)
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{
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created.Close();
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}
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else
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{
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// ReSharper disable once PossibleNullReferenceException
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dataStream.Position = lastPos;
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}
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}
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}
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// possible exceptions for reading the filename
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catch (UnauthorizedAccessException)
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{
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}
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catch (DirectoryNotFoundException)
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{
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}
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catch (IOException)
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{
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}
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// possible exceptions for setting/getting the position inside dataStream
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catch (NotSupportedException)
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{
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}
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catch (ObjectDisposedException)
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{
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}
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// possible exception when reading stuff into dataStream
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catch (ArgumentException)
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{
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}
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}
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internal void SetNativeImage(IntPtr handle)
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{
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if (handle == IntPtr.Zero)
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throw new ArgumentException("NativeHandle0");
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NativeImage = handle;
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}
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internal Guid RawGuid
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{
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get
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{
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var guid = new Guid();
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var status = ExternDllHelper.Gdip.GdipGetImageRawFormat(new HandleRef(this, NativeImage), ref guid);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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return guid;
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}
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}
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internal void StartAnimate()
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{
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ImageAnimator.Animate(this, OnFrameChanged);
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_isStart = true;
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}
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internal void StopAnimate()
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{
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ImageAnimator.StopAnimate(this, OnFrameChanged);
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_isStart = false;
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}
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internal Guid[] FrameDimensionsList
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{
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get
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{
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var status = ExternDllHelper.Gdip.GdipImageGetFrameDimensionsCount(new HandleRef(this, NativeImage), out var count);
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if (status != ExternDllHelper.Gdip.Ok)
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{
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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if (count <= 0)
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{
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return new Guid[0];
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}
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var size = Marshal.SizeOf(typeof(Guid));
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var buffer = Marshal.AllocHGlobal(checked(size * count));
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if (buffer == IntPtr.Zero)
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{
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throw ExternDllHelper.Gdip.StatusException(ExternDllHelper.Gdip.OutOfMemory);
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}
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status = ExternDllHelper.Gdip.GdipImageGetFrameDimensionsList(new HandleRef(this, NativeImage), buffer, count);
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if (status != ExternDllHelper.Gdip.Ok)
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{
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Marshal.FreeHGlobal(buffer);
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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var guids = new Guid[count];
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try
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{
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for (int i = 0; i < count; i++)
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{
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guids[i] = (Guid)ExternDllHelper.PtrToStructure((IntPtr)((long)buffer + size * i), typeof(Guid));
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}
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}
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finally
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{
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Marshal.FreeHGlobal(buffer);
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}
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return guids;
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}
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}
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internal int GetFrameCount(GifFrameDimension dimension)
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{
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var count = new[] { 0 };
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var dimensionId = dimension.Guid;
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var status = ExternDllHelper.Gdip.GdipImageGetFrameCount(new HandleRef(this, NativeImage), ref dimensionId, count);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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return count[0];
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}
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internal GifPropertyItem GetPropertyItem(int propid)
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{
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GifPropertyItem propitem;
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var status = ExternDllHelper.Gdip.GdipGetPropertyItemSize(new HandleRef(this, NativeImage), propid, out var size);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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if (size == 0)
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return null;
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var propdata = Marshal.AllocHGlobal(size);
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if (propdata == IntPtr.Zero)
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throw ExternDllHelper.Gdip.StatusException(ExternDllHelper.Gdip.OutOfMemory);
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status = ExternDllHelper.Gdip.GdipGetPropertyItem(new HandleRef(this, NativeImage), propid, size, propdata);
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try
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{
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if (status != ExternDllHelper.Gdip.Ok)
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{
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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propitem = GifPropertyItemInternal.ConvertFromMemory(propdata, 1)[0];
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}
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finally
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{
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Marshal.FreeHGlobal(propdata);
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}
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return propitem;
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}
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internal int SelectActiveFrame(GifFrameDimension dimension, int frameIndex)
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{
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var count = new[] { 0 };
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var dimensionId = dimension.Guid;
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var status = ExternDllHelper.Gdip.GdipImageSelectActiveFrame(new HandleRef(this, NativeImage), ref dimensionId, frameIndex);
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if (status != ExternDllHelper.Gdip.Ok)
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throw ExternDllHelper.Gdip.StatusException(status);
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return count[0];
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}
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[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
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[EditorBrowsable(EditorBrowsableState.Advanced)]
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[ResourceExposure(ResourceScope.Machine)]
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[ResourceConsumption(ResourceScope.Machine)]
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internal IntPtr GetHbitmap() => GetHbitmap(Colors.LightGray);
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[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
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[EditorBrowsable(EditorBrowsableState.Advanced)]
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[ResourceExposure(ResourceScope.Machine)]
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[ResourceConsumption(ResourceScope.Machine)]
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internal IntPtr GetHbitmap(Color background)
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{
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var status = ExternDllHelper.Gdip.GdipCreateHBITMAPFromBitmap(new HandleRef(this, NativeImage), out var hBitmap,
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ColorHelper.ToWin32(background));
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if (status == 2 && (Width >= short.MaxValue || Height >= short.MaxValue))
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{
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throw new ArgumentException("GdiplusInvalidSize");
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}
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if (status != ExternDllHelper.Gdip.Ok && NativeImage != IntPtr.Zero)
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{
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throw ExternDllHelper.Gdip.StatusException(status);
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}
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return hBitmap;
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}
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private void GetBitmapSource()
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{
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var handle = IntPtr.Zero;
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try
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{
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handle = GetHbitmap();
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Source = Imaging.CreateBitmapSourceFromHBitmap(handle, IntPtr.Zero, Int32Rect.Empty,
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BitmapSizeOptions.FromEmptyOptions());
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}
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catch
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{
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// ignored
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}
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finally
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{
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if (handle != IntPtr.Zero)
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{
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ExternDllHelper.DeleteObject(handle);
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}
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}
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}
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private void OnFrameChanged(object sender, EventArgs e)
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{
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Dispatcher.BeginInvoke(new Action(() =>
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{
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ImageAnimator.UpdateFrames();
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Source?.Freeze();
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GetBitmapSource();
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InvalidateVisual();
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}));
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}
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}
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} |