protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (Cloth != null)
{
var svgStream = Cloth.SvgAssembly.GetManifestResourceStream(Cloth.SvgPath);
if (svgStream == null)
{
throw new Exception(string.Format("Error retrieving {0} make sure Build Action is Embedded Resource",
Cloth.SvgPath));
}
var r = new SvgReader(new ClothStreamReader (svgStream, Cloth.Color), new StylesParser(new ValuesParser()), new ValuesParser());
var graphics = r.Graphic;
var width = Cloth.WidthRequest <= 0 ? 300 : Cloth.WidthRequest;
var height = Cloth.HeightRequest <= 0 ? 300 : Cloth.HeightRequest;
var scale = 1.0;
if (height >= width)
{
scale = height/graphics.Size.Height;
}
else
{
scale = width/graphics.Size.Width;
}
var scaleFactor = UIScreen.MainScreen.Scale;
var canvas = new ApplePlatform().CreateImageCanvas(graphics.Size, scale*scaleFactor);
graphics.Draw(canvas);
var image = canvas.GetImage();
var uiImage = image.GetUIImage();
Control.Image = uiImage;
}
}
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), new StylesParser(new ValuesParser()), new ValuesParser());
var graphics = svgReader.Graphic;
var newWidth = svgImage.WidthRequest == 0 ? 100 : svgImage.WidthRequest;
var newHeight = svgImage.HeightRequest == 0 ? 100 : svgImage.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();
result = image.Bitmap;
//result = SvgFactory.GetBitmap(svgStream, width, height);
});
return result;
}
async void UpdateSVGSource()
{
Control.ContentMode = UIViewContentMode.ScaleAspectFit;
Uri u;
try{
u = new Uri (_formsControl.SvgPath);
}catch{
Control.Image = UIImage.FromBundle (_formsControl.SvgDefaultImage);
return;
}
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{
Control.Image = UIImage.FromBundle (_formsControl.SvgDefaultImage);
return;
}
}
}
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{
Control.Image = UIImage.FromBundle (_formsControl.SvgDefaultImage);
return;
}
var graphics = r.Graphic;
var width = _formsControl.WidthRequest <= 0 ? 100 : _formsControl.WidthRequest;
var height = _formsControl.HeightRequest <= 0 ? 100 : _formsControl.HeightRequest;
var scale = 1.0;
if (height >= width)
{
scale = height/graphics.Size.Height;
}
else
{
scale = width/graphics.Size.Width;
}
var scaleFactor = UIScreen.MainScreen.Scale;
try{
var canvas = new ApplePlatform().CreateImageCanvas(graphics.Size, scale*scaleFactor);
graphics.Draw(canvas);
var image = canvas.GetImage();
var uiImage = image.GetUIImage();
Control.Image = uiImage;
}
catch{
Control.Image = UIImage.FromBundle (_formsControl.SvgDefaultImage);
}
}