private Brush MakeBrushFromVisual(Visual visual, Rect bounds, int dpi)
{
var viewport3D = visual as Viewport3D;
if (viewport3D == null)
{
Drawing drawing = VisualTreeHelper.GetDrawing(visual);
if (this.drawOutlines)
{
bounds.Inflate(outlinePen.Thickness / 2, outlinePen.Thickness / 2);
}
var offsetMatrix = new Matrix(1, 0, 0, 1, -bounds.Left, -bounds.Top);
var offsetMatrixTransform = new MatrixTransform(offsetMatrix);
offsetMatrixTransform.FreezeIfPossible();
var drawingVisual = new DrawingVisual();
using (var drawingContext = drawingVisual.RenderOpen())
{
drawingContext.PushTransform(offsetMatrixTransform);
if (this.drawOutlines)
{
drawingContext.DrawRectangle(null, outlinePen, bounds);
}
drawingContext.DrawDrawing(drawing);
drawingContext.Pop();
}
visual = drawingVisual;
}
var renderTargetBitmap = VisualCaptureUtil.RenderVisual(visual, bounds.Size, dpi, viewport3D: viewport3D);
renderTargetBitmap.FreezeIfPossible();
var imageBrush = new ImageBrush(renderTargetBitmap);
imageBrush.FreezeIfPossible();
return(imageBrush);
}