public void LargeImageTest(bool interpolate)
{
// this is a test of the DrawImage function; don't add pointless backgrounds to your plots
var plotModel = CreateTestModel1();
var pixelData = new OxyColor[5, 5];
for (int i = 0; i < pixelData.GetLength(0); i++)
{
for (int j = 0; j < pixelData.GetLength(1); j++)
{
pixelData[i, j] = OxyColor.FromArgb(255, 128, (byte)((i * 255) / pixelData.GetLength(0)), (byte)((j * 255) / pixelData.GetLength(1)));
}
}
var oxyImage = OxyImage.Create(pixelData, ImageFormat.Png);
var imageAnnotation = new ImageAnnotation()
{
ImageSource = oxyImage,
X = new PlotLength(-1, PlotLengthUnit.RelativeToViewport),
Y = new PlotLength(-1, PlotLengthUnit.RelativeToViewport),
Width = new PlotLength(3, PlotLengthUnit.RelativeToViewport),
Height = new PlotLength(3, PlotLengthUnit.RelativeToViewport),
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
Interpolate = interpolate
};
plotModel.Annotations.Add(imageAnnotation);
var fileName = Path.Combine(this.outputDirectory, $"LargeImage{(interpolate ? "Interpolated" : "Pixelated")}.png");
var exporter = new PngExporter {
Width = 400, Height = 300
};
using (var stream = File.OpenWrite(fileName))
{
exporter.Export(plotModel, stream);
}
Assert.IsTrue(File.Exists(fileName));
}
