public static void EraseLine(this CanvasRenderTarget target, Vector2 from, Vector2 to,
float strokeWidth, CanvasStrokeStyle strokeStyle)
{
var rect = new Rect(0, 0, target.SizeInPixels.Width, target.SizeInPixels.Height);
using (var overall = CanvasGeometry.CreateRectangle(target.Device, rect))
using (var path = new CanvasPathBuilderHelper(from, to).Build(target.Device))
using (var eraserbase = CanvasGeometry.CreatePath(path))
using (var eraser = eraserbase.Stroke(strokeWidth, strokeStyle))
using (var mask = overall.CombineWith(eraser, Matrix3x2Identity, CanvasGeometryCombine.Exclude))
using (var buffer = target.Clone())
{
using (var bds = buffer.CreateDrawingSession())
{
bds.Clear();
using (bds.CreateLayer(1.0f, mask))
{
bds.DrawImage(target);
}
}
using (var ds = target.CreateDrawingSession())
{
ds.Clear();
ds.DrawImage(buffer);
}
}
}
public static void EraseLine(this CanvasRenderTarget target, Vector2 from, Vector2 to,
float strokeWidth, CanvasStrokeStyle strokeStyle)
{
var rect = new Rect(0, 0, target.SizeInPixels.Width, target.SizeInPixels.Height);
using (var overall = CanvasGeometry.CreateRectangle(target.Device, rect))
using (var path = new CanvasPathBuilderHelper(from, to).Build(target.Device))
using (var eraserbase = CanvasGeometry.CreatePath(path))
using (var eraser = eraserbase.Stroke(strokeWidth, strokeStyle))
using (var mask = overall.CombineWith(eraser, Matrix3x2Identity, CanvasGeometryCombine.Exclude))
using (var buffer = target.Clone())
{
using (var bds = buffer.CreateDrawingSession())
{
bds.Clear();
using (bds.CreateLayer(1.0f, mask))
{
bds.DrawImage(target);
}
}
using (var ds = target.CreateDrawingSession())
{
ds.Clear();
ds.DrawImage(buffer);
}
}
}
