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]); } }