public static async Task <Bitmap> GetBitmapAsync(SvgImage svgImage, int width, int height)
{
Bitmap result = null;
Stream svgStream = await SvgService.GetSvgStreamAsync(svgImage).ConfigureAwait(false);
await Task.Run(() =>
{
var svgReader = new SvgReader(new StreamReader(svgStream));
var graphics = svgReader.Graphic;
var scale = 1.0;
if (height >= width)
{
scale = height / graphics.Size.Height;
}
else
{
scale = width / graphics.Size.Width;
}
var canvas = new AndroidPlatform().CreateImageCanvas(graphics.Size, scale);
graphics.Draw(canvas);
var image = (BitmapImage)canvas.GetImage();
result = image.Bitmap;
});
return(result);
}
public async void Render( )
{
//added check because both *may* not be set at the same time, this negates the error throwing unfortuantely. --bwc
if (String.IsNullOrEmpty(Element.SvgPath) || (Element.SvgAssembly == null))
{
return;
}
if (_formsControl != null)
{
await Task.Run(async( ) =>
{
Stream svgStream = _formsControl.SvgAssembly.GetManifestResourceStream(_formsControl.SvgPath);
if (svgStream == null)
{
throw new Exception(string.Format("Error retrieving {0} make sure Build Action is Embedded Resource", _formsControl.SvgPath));
}
SvgReader r = new SvgReader(new StreamReader(svgStream), new StylesParser(new ValuesParser( )), new ValuesParser( ));
this.ReplaceColors(r.Graphic, Element.ReplacementColors);
Graphic graphics = r.Graphic;
int width = PixelToDP((int)_formsControl.WidthRequest <= 0 ? 100 : (int)_formsControl.WidthRequest);
int height = PixelToDP((int)_formsControl.HeightRequest <= 0 ? 100 : (int)_formsControl.HeightRequest);
double scale = 1.0;
if (height >= width)
{
scale = height / graphics.Size.Height;
}
else
{
scale = width / graphics.Size.Width;
}
IImageCanvas canvas = new AndroidPlatform( ).CreateImageCanvas(graphics.Size, scale);
graphics.Draw(canvas);
BitmapImage image = (BitmapImage)canvas.GetImage( );
return(image);
}).ContinueWith(taskResult =>
{
Device.BeginInvokeOnMainThread(() =>
{
var imageView = new ImageView(Context);
imageView.SetScaleType(ImageView.ScaleType.FitXy);
imageView.SetImageBitmap(taskResult.Result.Bitmap);
SetNativeControl(imageView);
});
});
}
}
protected override async void OnElementChanged(ElementChangedEventArgs <SvgImage> e)
{
base.OnElementChanged(e);
if (_formsControl != null)
{
await Task.Run(async() =>
{
var svgStream = _formsControl.SvgAssembly.GetManifestResourceStream(_formsControl.SvgPath);
if (svgStream == null)
{
throw new Exception(string.Format("Error retrieving {0} make sure Build Action is Embedded Resource",
_formsControl.SvgPath));
}
var r = new SvgReader(new StreamReader(svgStream), new StylesParser(new ValuesParser()), new ValuesParser());
var graphics = r.Graphic;
var width = PixelToDP((int)_formsControl.WidthRequest <= 0 ? 100 : (int)_formsControl.WidthRequest);
var height = PixelToDP((int)_formsControl.HeightRequest <= 0 ? 100 : (int)_formsControl.HeightRequest);
var scale = 1.0;
if (height >= width)
{
scale = height / graphics.Size.Height;
}
else
{
scale = width / graphics.Size.Width;
}
var canvas = new AndroidPlatform().CreateImageCanvas(graphics.Size, scale);
graphics.Draw(canvas);
var image = (BitmapImage)canvas.GetImage();
return(image);
}).ContinueWith(taskResult =>
{
Device.BeginInvokeOnMainThread(() =>
{
var imageView = new ImageView(Context);
imageView.SetScaleType(ImageView.ScaleType.CenterInside);
imageView.SetImageBitmap(taskResult.Result.Bitmap);
SetNativeControl(imageView);
});
});
}
}
async void UpdateSVGSource()
{
await Task.Run(async() =>
{
Uri u;
try{
u = new Uri(_formsControl.SvgPath);
}catch (Exception e) {
Insights.Report(e);
return(null);
}
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), Path.GetFileName(u.AbsolutePath));
if (!File.Exists(path))
{
using (var client = new HttpClient()) {
try{
var bytes = await client.GetByteArrayAsync(_formsControl.SvgPath);
File.WriteAllBytes(path, bytes);
}catch (Exception e) {
Insights.Report(e);
return(null);
}
}
}
var svgStream = File.OpenRead(path);
if (svgStream == null)
{
throw new Exception(string.Format("Error retrieving {0} make sure Build Action is Embedded Resource",
_formsControl.SvgPath));
}
SvgReader r;
try{
r = new SvgReader(new StreamReader(svgStream), new StylesParser(new ValuesParser()), new ValuesParser());
}catch (Exception e) {
Insights.Report(e);
return(null);
}
var graphics = r.Graphic;
var width = PixelToDP((int)_formsControl.WidthRequest <= 0 ? 100 : (int)_formsControl.WidthRequest);
var height = PixelToDP((int)_formsControl.HeightRequest <= 0 ? 100 : (int)_formsControl.HeightRequest);
var scale = 1.0;
if (height >= width)
{
scale = height / graphics.Size.Height;
}
else
{
scale = width / graphics.Size.Width;
}
try{
var canvas = new AndroidPlatform().CreateImageCanvas(graphics.Size, scale);
graphics.Draw(canvas);
var image = (BitmapImage)canvas.GetImage();
return(image);
}
catch (Exception e) {
Insights.Report(e);
return(null);
}
}).ContinueWith(taskResult =>
{
Device.BeginInvokeOnMainThread(() =>
{
var imageView = new ImageView(Context);
SetNativeControl(imageView);
if (taskResult.Result == null)
{
var id = getResourceId(_formsControl.SvgDefaultImage, "drawable", Context.PackageName);
Control.SetImageResource(id);
return;
}
imageView.SetScaleType(ImageView.ScaleType.CenterInside);
imageView.SetImageBitmap(taskResult.Result.Bitmap);
});
});
}