public Task <bool> LoadImageAsync(NativeImage image, ImageSource imageSource, CancellationToken cancelationToken = default(CancellationToken))
{
ImageSource newSource = null;
switch (imageSource)
{
case SKImageImageSource imageImageSource:
newSource = ImageSource.FromStream(() => ToStream(imageImageSource.Image));
break;
case SKBitmapImageSource bitmapImageSource:
newSource = ImageSource.FromStream(() => ToStream(SKImage.FromBitmap(bitmapImageSource.Bitmap)));
break;
case SKPixmapImageSource pixmapImageSource:
newSource = ImageSource.FromStream(() => ToStream(SKImage.FromPixels(pixmapImageSource.Pixmap)));
break;
case SKPictureImageSource pictureImageSource:
newSource = ImageSource.FromStream(() => ToStream(SKImage.FromPicture(pictureImageSource.Picture, pictureImageSource.Dimensions)));
break;
}
return(handler.LoadImageAsync(image, newSource, cancelationToken));
}
// Pixbuf
public static Pixbuf ToPixbuf(this SKPicture picture, SKSizeI dimensions)
{
using (var image = SKImage.FromPicture(picture, dimensions))
{
return(image.ToPixbuf());
}
}
// System.Drawing.Bitmap
public static System.Drawing.Bitmap ToBitmap(this SKPicture picture, SKSizeI dimensions)
{
using (var image = SKImage.FromPicture(picture, dimensions))
{
return(image.ToBitmap());
}
}
// WriteableBitmap
public static WriteableBitmap ToWriteableBitmap(this SKPicture picture, SKSizeI dimensions)
{
using (var image = SKImage.FromPicture(picture, dimensions))
{
return(image.ToWriteableBitmap());
}
}
public static Bitmap ToBitmap(this SKPicture skiaPicture, SKSizeI dimensions)
{
using (var img = SKImage.FromPicture(skiaPicture, dimensions))
{
return(img.ToBitmap());
}
}
private void Svg2Png(PlotModel model)
{
SvgExporter exporter = new SvgExporter {
Width = 600, Height = 400
};
var svg = new SkiaSharp.Extended.Svg.SKSvg();
var imgQuality = 80;
using (FileStream fs = System.IO.File.Create("temp.svg"))
{
exporter.Export(model, fs);
}
using (FileStream png = System.IO.File.Create("img.png"))
{
var pict = svg.Load("temp.svg");
var dimen = new SKSizeI(
(int)Math.Ceiling(pict.CullRect.Width),
(int)Math.Ceiling(pict.CullRect.Height)
);
var matrix = SKMatrix.MakeScale(1, 1);
var img = SKImage.FromPicture(pict, dimen, matrix);
// convert to PNG
var skdata = img.Encode(SKEncodedImageFormat.Png, imgQuality);
skdata.SaveTo(png);
}
}
public static Task <SKImage?> ToSKImageAsync(this ImageSource imageSource, CancellationToken cancellationToken = default)
{
if (imageSource == null)
{
throw new ArgumentNullException(nameof(imageSource));
}
return(imageSource switch
{
// 1. first try SkiaSharp sources
SKImageImageSource iis => FromSkia(iis.Image),
SKBitmapImageSource bis => FromSkia(SKImage.FromBitmap(bis.Bitmap)),
SKPixmapImageSource xis => FromSkia(SKImage.FromPixels(xis.Pixmap)),
SKPictureImageSource pis => FromSkia(SKImage.FromPicture(pis.Picture, pis.Dimensions)),
// 2. then try Stream sources
StreamImageSource stream => FromStream(stream.Stream.Invoke(cancellationToken)),
UriImageSource uri => FromStream(uri.GetStreamAsync(cancellationToken)),
// 3. finally, use the handlers
FileImageSource file => FromHandler(PlatformToSKImageAsync(file, cancellationToken)),
FontImageSource font => FromHandler(PlatformToSKImageAsync(font, cancellationToken)),
// 4. all is lost
_ => throw new ArgumentException("Unable to determine the type of image source.", nameof(imageSource))
});
internal static void ExportSkp(IToolContext context, string path, IContainerView containerView)
{
var recorder = new SKPictureRecorder();
var rect = new SKRect(0f, 0f, (float)containerView.Width, (float)containerView.Height);
var canvas = recorder.BeginRecording(rect);
using (var skiaContainerPresenter = new SkiaExportContainerPresenter(context, containerView))
{
skiaContainerPresenter.Draw(canvas, containerView.Width, containerView.Height, 0, 0, 1.0, 1.0);
}
var picture = recorder.EndRecording();
var dimensions = new SKSizeI((int)containerView.Width, (int)containerView.Height);
using (var image = SKImage.FromPicture(picture, dimensions))
{
var data = image.EncodedData;
if (data != null)
{
using (var stream = File.OpenWrite(path))
{
data.SaveTo(stream);
}
}
}
picture.Dispose();
}
/// <summary>
/// Create image tile from all sources that are contained in the MGLStyleFile
/// </summary>
/// <param name="styleFile">StyleFile to use</param>
/// <param name="tile">TileInfo of tile to draw</param>
/// <param name="tileSize">Tile size of the image tile</param>
/// <returns>Byte array of image data</returns>
private static byte[] CreateTile(MGLStyleFile styleFile, TileInfo tile, int tileSize)
{
var recorder = new SKPictureRecorder();
var stopwatch = new System.Diagnostics.Stopwatch();
recorder.BeginRecording(new SKRect(0, 0, tileSize, tileSize));
var canvas = recorder.RecordingCanvas;
canvas.ClipRect(new SKRect(0, 0, tileSize, tileSize));
if (styleFile.TileSources != null && styleFile.TileSources.Count > 0)
{
// We have one or more sources, so draw each source after the other
foreach (var source in styleFile.TileSources)
{
stopwatch.Start();
var vectorDrawable = source.GetDrawable(tile);
stopwatch.Stop();
stopwatchResults.Add($"Ellapsed time for GetDrawable of ${source.Name}: {stopwatch.ElapsedMilliseconds} ms");
stopwatch.Reset();
stopwatch.Start();
if (vectorDrawable is SKDrawable drawable)
{
vectorDrawable.Context.Zoom = float.Parse(tile.Index.Level);
vectorDrawable.Context.Tags = null;
canvas.Save();
canvas.Scale(tileSize / drawable.Bounds.Width);
canvas.DrawDrawable(drawable, 0, 0);
canvas.Restore();
}
stopwatch.Stop();
stopwatchResults.Add($"Ellapsed time for DrawDrawable of ${source.Name}: {stopwatch.ElapsedMilliseconds} ms");
stopwatch.Reset();
}
}
stopwatch.Start();
var byteArray = SKImage.FromPicture(recorder.EndRecording(), new SKSizeI(tileSize, tileSize), new SKPaint()
{
IsAntialias = true
}).Encode().ToArray();
stopwatch.Stop();
stopwatchResults.Add($"Ellapsed time for drawing picture: {stopwatch.ElapsedMilliseconds} ms");
return(byteArray);
}
public static async Task GeneratePng(int width, int height, string filepath, string filename, int quality)
{
var svg2 = new SKSvg(new SKSize(width, height));
svg2.Load(filepath);
using (var image = SKImage.FromPicture(svg2.Picture, new SKSizeI(width, height)))
{
using (var data = image.Encode(SKEncodedImageFormat.Png, quality))
{
// save the data to a stream
using (var stream = File.OpenWrite(filename))
{
data.SaveTo(stream);
await stream.FlushAsync();
}
}
}
}
public static void RenderSvg(this Image view, string uri)
{
try
{
var svg = new SKSvg();
var req = (HttpWebRequest)WebRequest.Create(uri);
req.BeginGetResponse((ar) =>
{
var res = (ar.AsyncState as HttpWebRequest)?.EndGetResponse(ar) as HttpWebResponse;
using (var stream = res?.GetResponseStream())
{
if (stream == null)
{
return;
}
var picture = svg.Load(stream);
using (var image = SKImage.FromPicture(picture, picture.CullRect.Size.ToSizeI()))
using (var data = image.Encode(SKEncodedImageFormat.Jpeg, 80))
{
var ms = new MemoryStream();
if (data == null || data.IsEmpty)
{
return;
}
data.SaveTo(ms);
ms.Seek(0, SeekOrigin.Begin);
ms.Position = 0;
view.Source = ImageSource.FromStream(() => ms);
}
}
}, req);
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to render svg: {ex}");
throw;
}
}
public static SKBitmapImageSource Load(string source, Aspect aspect, double width, double height)
{
// No image needed?
if (string.IsNullOrWhiteSpace(source) || width <= 0 || height <= 0)
{
return(null);
}
// Read the image
string key = GetKey(source);
SkiaSharp.Extended.Svg.SKSvg svg = LoadSVG(key);
CalculateBounds(true, svg, aspect, width, height, out SKMatrix drawMatrix, out SKSizeI pixelSize);
// Check the cache
if (ImageSourceCache.TryGetValue(key, out Tuple <SKSizeI, SKBitmapImageSource> cacheEntry))
{
if (cacheEntry.Item1.Width >= pixelSize.Width * (1 - CacheTolerance) &&
cacheEntry.Item1.Height >= pixelSize.Height * (1 - CacheTolerance))
{
// Already cached
return(cacheEntry.Item2);
}
else
{
// Dispose/remove current entry
cacheEntry.Item2.Bitmap?.Dispose();
ImageSourceCache.Remove(key);
}
}
// Convert to an SKBitmapImageSource
using (SKImage image = SKImage.FromPicture(svg.Picture, pixelSize, drawMatrix))
{
SKBitmapImageSource imageSource = new SKBitmapImageSource()
{
Bitmap = SKBitmap.FromImage(image)
};
ImageSourceCache.Add(key, Tuple.Create(pixelSize, imageSource));
return(imageSource);
}
}
protected virtual async Task GeneratePng(SKSvg svg2, float width, float height, string filename, int quality, bool icon = false)
{
if (svg2?.Picture == null)
{
return;
}
// calculate the scaling need to fit
var matrix = SKMatrix.CreateScale(width / svg2.Picture.CullRect.Width, height / svg2.Picture.CullRect.Height);
using var image = icon
? ConvertProfile(SKImage.FromPicture(svg2.Picture, new SKSizeI((int)width, (int)height), matrix), width,
height)
: SKImage.FromPicture(svg2.Picture, new SKSizeI((int)width, (int)height), matrix);
using var data = image.Encode(SKEncodedImageFormat.Png, quality);
// save the data to a stream
await using var stream = File.OpenWrite(filename);
data.SaveTo(stream);
await stream.FlushAsync();
}
/// <summary>
/// Grab the source, and return a png stream
/// </summary>
/// <param name="target"></param>
/// <param name="outgoingData"></param>
public override void GetData(object target, Stream outgoingData)
{
if (target is SKBitmap image1)
{
var bitmapSource = image1.Encode(SKEncodedImageFormat.Png, 100).AsStream();
base.GetData(new SerializableBitmapImage(bitmapSource), outgoingData);
}
else if (target is SKImage image2)
{
var bitmapSource = image2.Encode(SKEncodedImageFormat.Png, 100).AsStream();
base.GetData(new SerializableBitmapImage(bitmapSource), outgoingData);
}
else if (target is SKSurface image3)
{
base.GetData(
new SerializableBitmapImage(image3.Snapshot().Encode(SKEncodedImageFormat.Png, 100).AsStream()),
outgoingData);
}
else if (target is SKDrawable image4)
{
base.GetData(
new SerializableBitmapImage(SKImage.FromPicture(image4.Snapshot(), new SKSizeI(1024, 1024)).Encode(SKEncodedImageFormat.Png, 100).AsStream()),
outgoingData);
}
else if (target is SKCanvas image5)
{
base.GetData(
new SerializableBitmapImage(new byte[0]),
outgoingData);
}
else if (target is SKPicture image6)
{
base.GetData(
new SerializableBitmapImage(SKImage.FromPicture(image6, new SKSizeI(512, 512)).Encode(SKEncodedImageFormat.Png, 100).AsStream()),
outgoingData);
}
else
{
base.GetData(target, outgoingData);
}
}
static void Main(string[] args)
{
var srcPath = "../Icons";
var dstPath = "../Icons.Png";
if (!Directory.Exists(dstPath))
{
Directory.CreateDirectory(dstPath);
}
foreach (var inputPath in Directory.GetFiles(srcPath, "*.svg"))
{
Console.WriteLine(inputPath);
using var inputStream = new FileStream(inputPath, FileMode.Open, FileAccess.Read);
var outputPath = Path.Combine(dstPath, Path.GetFileNameWithoutExtension(inputPath) + ".png");
var quality = 100;
var svg = new SkiaSharp.Extended.Svg.SKSvg();
try
{
var pict = svg.Load(inputStream);
var dimen = new SkiaSharp.SKSizeI(
(int)Math.Ceiling(pict.CullRect.Width) * 5,
(int)Math.Ceiling(pict.CullRect.Height) * 5
);
var matrix = SKMatrix.MakeScale(5, 5);
var img = SKImage.FromPicture(pict, dimen, matrix);
// convert to PNG
var skdata = img.Encode(SkiaSharp.SKEncodedImageFormat.Png, quality);
using (var stream = File.OpenWrite(outputPath))
{
skdata.SaveTo(stream);
}
}
catch
{
}
}
}
public string ToImage(int width,
int height,
_Callback <SKImage> raw_image_callback)
{
if (raw_image_callback == null)
{
return("Image callback was invalid");
}
if (m_layerTree == null)
{
return("Scene did not contain a layer tree.");
}
if (width == 0 || height == 0)
{
return("Image dimensions for scene were invalid.");
}
// We can't create an image on this task runner because we don't have a
// graphics context. Even if we did, it would be slow anyway. Also, this
// thread owns the sole reference to the layer tree. So we flatten the layer
// tree into a picture and use that as the thread transport mechanism.
var picture = m_layerTree.Flatten(new SKRect(0, 0, width, height));
if (picture == null)
{
// Already in Dart scope.
return("Could not flatten scene into a layer tree.");
}
var image = SKImage.FromPicture(picture, new SKSizeI(width, height));
raw_image_callback(image);
return(string.Empty);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var p = (string)parameter;
if (_cache.TryGetValue(p, out var val))
{
return(val);
}
var scale = 1.0f;
var text = "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"48\" height=\"48\" viewBox=\"0 0 24 24\"><path d=\"" + p + "\" fill=\"#ffffff\"/><path d=\"M0 0h24v24H0z\" fill=\"none\"/></svg>";
var data = Encoding.UTF8.GetBytes(text);
using (var str = new MemoryStream(data))
{
var svg = new SkiaSharp.Extended.Svg.SKSvg();
var pict = svg.Load(str);
var dimen = new SKSizeI(
(int)(Math.Ceiling(pict.CullRect.Width) * scale),
(int)(Math.Ceiling(pict.CullRect.Height) * scale)
);
var matrix = SKMatrix.CreateScale(scale, scale);
var img = SKImage.FromPicture(pict, dimen, matrix);
// convert to PNG
var skdata = img.Encode(SKEncodedImageFormat.Png, 75);
var source = new StreamImageSource()
{
Stream = t => Task.FromResult(skdata.AsStream())
};
_cache.TryAdd(p, source);
return(source);
}
}
private static UIImage CreateImageFromWasabeePinSvg(string color, int width, int height)
{
if (ImagesCache.ContainsKey(color))
{
return(ImagesCache[color]);
}
SKPicture picture;
var pin = new WasabeePinSvg(color);
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(pin.RawData)))
picture = new SkiaSharp.Extended.Svg.SKSvg().Load(stream);
var image = SKImage.FromPicture(picture, new SKSizeI((int)picture.CullRect.Size.Width, (int)picture.CullRect.Size.Height)).ToUIImage();
var resizedImage = ResizeImage(image, width, height);
if (resizedImage is null)
{
return(Google.Maps.Marker.MarkerImage(UIColor.Red));
}
ImagesCache.Add(color, resizedImage);
return(resizedImage);
}
public static void CreateOgImage(
[QueueTrigger("ClassifyResultCreate")] string input,
[Table("ClassifyResult", "ja-en", "{queueTrigger}")] ResponseTableEntity tableEntity,
[Blob("classifyresultogimage/{queueTrigger}.png", FileAccess.Write)] Stream imageStream,
ILogger log)
{
log.LogInformation($"Handle {input}");
var response = JsonConvert.DeserializeObject <Response>(tableEntity.ResponseData);
var barFactor = 600;
var adultBar = response.Categories.First(x => x.Name == "Adult").Score *barFactor;
var racyBar = response.Categories.First(x => x.Name == "Racy").Score *barFactor;
var offensiveBar = response.Categories.First(x => x.Name == "Offensive").Score *barFactor;
var svgString = $@"<?xml version=""1.0""?>
<svg width=""960""
height=""480""
xmlns=""http://www.w3.org/2000/svg""
xmlns:svg=""http://www.w3.org/2000/svg"">
<g class=""layer"">
<text fill=""#000000""
font-family=""Meiryo""
font-size=""48""
id=""svg_1""
stroke=""#000000""
stroke-width=""0""
text-anchor=""start""
x=""32""
y=""48"">JapaniseTextClassifier</text>
<switch>
<foreignObject x=""64""
y=""64""
width=""832""
height=""240"">
<p xmlns=""http://www.w3.org/1999/xhtml"" style=""font-size: 24px; font-family: Meiryo;"">
{response.Request.Text}
</p>
</foreignObject>
<text fill=""#000000""
font-family=""Meiryo""
font-size=""24""
id=""svg_2""
stroke=""#000000""
stroke-width=""0""
text-anchor=""start""
x=""64""
y=""96"">{response.Request.Text}</text>
</switch>
<text fill=""#000000""
font-family=""Meiryo""
font-size=""24""
id=""svg_3""
stroke=""#000000""
stroke-width=""0""
text-anchor=""start""
x=""64""
y=""370"">Adult</text>
<text fill=""#000000""
font-family=""Meiryo""
font-size=""24""
id=""svg_4""
stroke=""#000000""
stroke-width=""0""
text-anchor=""start""
x=""64""
y=""410"">Racy</text>
<text fill=""#000000""
font-family=""Meiryo""
font-size=""24""
id=""svg_5""
stroke=""#000000""
stroke-width=""0""
text-anchor=""start""
x=""64""
y=""450"">Offensive</text>
<rect fill=""#000000""
height=""32""
id=""svg_6""
stroke=""#000000""
stroke-width=""5""
width=""{adultBar}""
x=""240""
y=""340""/>
<rect fill=""#000000""
height=""32""
id=""svg_7""
stroke=""#000000""
stroke-width=""5""
width=""{racyBar}""
x=""240""
y=""380""/>
<rect fill=""#000000""
height=""32""
id=""svg_8""
stroke=""#000000""
stroke-width=""5""
width=""{offensiveBar}""
x=""240""
y=""420""/>
</g>
</svg>";
var svg = new SkiaSharp.Extended.Svg.SKSvg();
var pict = svg.Load(new MemoryStream(Encoding.UTF8.GetBytes(svgString)));
var dimen = new SKSizeI(
(int)Math.Ceiling(pict.CullRect.Width),
(int)Math.Ceiling(pict.CullRect.Height)
);
var matrix = SKMatrix.MakeScale(1, 1);
var img = SKImage.FromPicture(pict, dimen, matrix);
var quality = 90;
var skdata = img.Encode(SkiaSharp.SKEncodedImageFormat.Png, quality);
skdata.SaveTo(imageStream);
log.LogInformation(svgString);
}
public static CGImage ToCGImage(this SKPicture skiaPicture, SKSizeI dimensions)
{
var img = SKImage.FromPicture(skiaPicture, dimensions);
return(img.ToCGImage());
}
public static IHtmlContent Render(this SKPicture picture)
{
using var image = SKImage.FromPicture(picture, picture.CullRect.Size.ToSizeI());
return(Render(image));
}
public static Bitmap ToBitmap(this SKPicture skiaPicture, SKSizeI dimensions)
{
var img = SKImage.FromPicture(skiaPicture, dimensions);
return(ToBitmap(img));
}