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223 lines (189 loc) · 6.14 KB
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using System.Diagnostics;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GMap.NET.MapProviders;
namespace GMap.NET.WindowsPresentation
{
/// <summary>
/// image abstraction
/// </summary>
public class GMapImage : PureImage
{
public ImageSource Img;
public override void Dispose()
{
if (Img != null)
{
Img = null;
}
if (Data != null)
{
Data.Dispose();
Data = null;
}
}
}
/// <summary>
/// image abstraction proxy
/// </summary>
public class GMapImageProxy : PureImageProxy
{
private GMapImageProxy()
{
}
public static void Enable()
{
GMapProvider.TileImageProxy = Instance;
}
public static readonly GMapImageProxy Instance = new GMapImageProxy();
public override PureImage FromStream(Stream stream)
{
if (stream != null)
{
try
{
var m = BitmapFrame.Create(stream,
BitmapCreateOptions.IgnoreColorProfile,
BitmapCacheOption.OnLoad);
var ret = new GMapImage {Img = m};
if (ret.Img.CanFreeze)
{
ret.Img.Freeze();
}
return ret;
}
catch
{
stream.Position = 0;
int type = stream.Length > 0 ? stream.ReadByte() : 0;
Debug.WriteLine("WindowsPresentationImageProxy: unknown image format: " + type);
}
}
return null;
}
public override bool Save(Stream stream, PureImage image)
{
var ret = (GMapImage)image;
if (ret.Img != null)
{
try
{
var e = new PngBitmapEncoder();
e.Frames.Add(BitmapFrame.Create(ret.Img as BitmapSource));
e.Save(stream);
return true;
}
catch
{
// ignore
}
}
return false;
}
}
//internal class TileVisual : FrameworkElement
//{
// public readonly ObservableCollection<ImageSource> Source;
// public readonly RawTile Tile;
// public TileVisual(IEnumerable<ImageSource> src, RawTile tile)
// {
// Opacity = 0;
// Tile = tile;
// Source = new ObservableCollection<ImageSource>(src);
// Source.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Source_CollectionChanged);
// this.Loaded += new RoutedEventHandler(ImageVisual_Loaded);
// this.Unloaded += new RoutedEventHandler(ImageVisual_Unloaded);
// }
// void Source_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
// {
// if (IsLoaded)
// {
// switch (e.Action)
// {
// case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
// case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
// case System.Collections.Specialized.NotifyCollectionChangedAction.Remove:
// case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
// {
// UpdateVisual();
// }
// break;
// case System.Collections.Specialized.NotifyCollectionChangedAction.Reset:
// {
// Child = null;
// }
// break;
// }
// }
// }
// void ImageVisual_Unloaded(object sender, RoutedEventArgs e)
// {
// Child = null;
// }
// void ImageVisual_Loaded(object sender, RoutedEventArgs e)
// {
// UpdateVisual();
// }
// Visual _child;
// public virtual Visual Child
// {
// get
// {
// return _child;
// }
// set
// {
// if (_child != value)
// {
// if (_child != null)
// {
// RemoveLogicalChild(_child);
// RemoveVisualChild(_child);
// }
// if (value != null)
// {
// AddVisualChild(value);
// AddLogicalChild(value);
// }
// // cache the new child
// _child = value;
// InvalidateVisual();
// }
// }
// }
// public void UpdateVisual()
// {
// Child = Create();
// }
// static readonly Pen gridPen = new Pen(Brushes.White, 2.0);
// private DrawingVisual Create()
// {
// var dv = new DrawingVisual();
// using (DrawingContext dc = dv.RenderOpen())
// {
// foreach (var img in Source)
// {
// var rect = new Rect(0, 0, img.Width + 0.6, img.Height + 0.6);
// dc.DrawImage(img, rect);
// dc.DrawRectangle(null, gridPen, rect);
// }
// }
// return dv;
// }
// #region Necessary Overrides -- Needed by WPF to maintain bookkeeping of our hosted visuals
// protected override int VisualChildrenCount
// {
// get
// {
// return (Child == null ? 0 : 1);
// }
// }
// protected override Visual GetVisualChild(int index)
// {
// Debug.Assert(index == 0);
// return Child;
// }
// #endregion
//}
}