public void TestDisposal()
{
var plotModel = (IPlotModel)ShowCases.CreateNormalDistributionModel();
((PlotModel)plotModel).DefaultFont = "Arial";
plotModel.Update(true);
string ExportToBitmap(string fileName, SkiaRenderContext context)
{
using var bitmap = new SKBitmap(800, 600);
using var canvas = new SKCanvas(bitmap);
context.SkCanvas = canvas;
canvas.Clear(SKColors.White);
plotModel.Render(context, new OxyRect(0, 0, 800, 600));
var path = Path.Combine(this.outputDirectory, fileName + ".png");
using var fileStream = File.OpenWrite(path);
using var skStream = new SKManagedWStream(fileStream);
bitmap.Encode(skStream, SKEncodedImageFormat.Png, 0);
return(path);
}
using var renderContext = new SkiaRenderContext()
{
RenderTarget = RenderTarget.PixelGraphic
};
var path1 = ExportToBitmap("export1", renderContext);
string path2;
using (var renderContext2 = new SkiaRenderContext()
{
RenderTarget = RenderTarget.PixelGraphic
})
{
path2 = ExportToBitmap("export2", renderContext2);
}
var path3 = ExportToBitmap("export3", renderContext);
PngAssert.AreEqual(path1, path2, null, null);
PngAssert.AreEqual(path1, path3, null, null);
}
/// <inheritdoc/>
public void Export(IPlotModel model, Stream stream)
{
using var skStream = new SKManagedWStream(stream);
using var canvas = SKSvgCanvas.Create(new SKRect(0, 0, Width, Height), skStream);
if (!model.Background.IsInvisible())
{
canvas.Clear(model.Background.ToSKColor());
}
// SVG export does not work with UseTextShaping=true. However SVG does text shaping by itself anyway, so we can just disable it
using var context = new SkiaRenderContext
{
RenderTarget = RenderTarget.VectorGraphic,
SkCanvas = canvas,
UseTextShaping = false,
DpiScale = Dpi / 96
};
//use fake dpi to scale, looks much better!
model.Update(true);
model.Render(context, new OxyRect(0, 0, Width / context.DpiScale, Height / context.DpiScale));
}
