public void ImageShouldBeOverlayedByPath()
{
string path = CreateOutputDirectory("Drawing", "Path");
var image = new Image(500, 500);
var linerSegemnt = new LinearLineSegment(
new Vector2(10, 10),
new Vector2(200, 150),
new Vector2(50, 300));
var bazierSegment = new BezierLineSegment(new Vector2(50, 300),
new Vector2(500, 500),
new Vector2(60, 10),
new Vector2(10, 400));
var p = new CorePath(linerSegemnt, bazierSegment);
using (FileStream output = File.OpenWrite($"{path}/Simple.png"))
{
image
.BackgroundColor(Color.Blue)
.DrawPath(Color.HotPink, 5, p)
.Save(output);
}
using (var sourcePixels = image.Lock())
{
Assert.Equal(Color.HotPink, sourcePixels[9, 9]);
Assert.Equal(Color.HotPink, sourcePixels[199, 149]);
Assert.Equal(Color.Blue, sourcePixels[50, 50]);
}
}
public void ImageShouldBeOverlayedPathWithOpacity()
{
string path = CreateOutputDirectory("Drawing", "Path");
var color = new Color(Color.HotPink.R, Color.HotPink.G, Color.HotPink.B, 150);
var linerSegemnt = new LinearLineSegment(
new Vector2(10, 10),
new Vector2(200, 150),
new Vector2(50, 300)
);
var bazierSegment = new BezierLineSegment(new Vector2(50, 300),
new Vector2(500, 500),
new Vector2(60, 10),
new Vector2(10, 400));
var p = new CorePath(linerSegemnt, bazierSegment);
var image = new Image(500, 500);
using (FileStream output = File.OpenWrite($"{path}/Opacity.png"))
{
image
.BackgroundColor(Color.Blue)
.DrawPath(color, 10, p)
.Save(output);
}
//shift background color towards forground color by the opacity amount
var mergedColor = new Color(Vector4.Lerp(Color.Blue.ToVector4(), Color.HotPink.ToVector4(), 150f / 255f));
using (var sourcePixels = image.Lock())
{
Assert.Equal(mergedColor, sourcePixels[9, 9]);
Assert.Equal(mergedColor, sourcePixels[199, 149]);
Assert.Equal(Color.Blue, sourcePixels[50, 50]);
}
}
