public void DrawUse(SvgUse svgUse, bool ignoreDisplay)
{
if (!CanDraw(svgUse, ignoreDisplay))
{
return;
}
var svgVisualElement = SkiaUtil.GetReference <SvgVisualElement>(svgUse, svgUse.ReferencedElement);
if (svgVisualElement == null || SkiaUtil.HasRecursiveReference(svgUse))
{
return;
}
float x = svgUse.X.ToDeviceValue(null, UnitRenderingType.Horizontal, svgUse);
float y = svgUse.Y.ToDeviceValue(null, UnitRenderingType.Vertical, svgUse);
var skMatrixTranslateXY = SKMatrix.MakeTranslation(x, y);
var skMatrix = SkiaUtil.GetSKMatrix(svgUse.Transforms);
SKMatrix.PreConcat(ref skMatrix, ref skMatrixTranslateXY);
var ew = svgUse.Width.ToDeviceValue(null, UnitRenderingType.Horizontal, svgUse);
var eh = svgUse.Height.ToDeviceValue(null, UnitRenderingType.Vertical, svgUse);
if (ew > 0 && eh > 0)
{
var _attributes = svgVisualElement.GetType().GetField("_attributes", BindingFlags.NonPublic | BindingFlags.Instance);
if (_attributes != null)
{
var attributes = _attributes.GetValue(svgVisualElement) as SvgAttributeCollection;
if (attributes != null)
{
var viewBox = attributes.GetAttribute <SvgViewBox>("viewBox");
if (viewBox != SvgViewBox.Empty && Math.Abs(ew - viewBox.Width) > float.Epsilon && Math.Abs(eh - viewBox.Height) > float.Epsilon)
{
var sw = ew / viewBox.Width;
var sh = eh / viewBox.Height;
var skMatrixTranslateSWSH = SKMatrix.MakeTranslation(sw, sh);
SKMatrix.PreConcat(ref skMatrix, ref skMatrixTranslateSWSH);
}
}
}
}
var originalParent = svgUse.Parent;
var useParent = svgUse.GetType().GetField("_parent", BindingFlags.NonPublic | BindingFlags.Instance);
if (useParent != null)
{
useParent.SetValue(svgVisualElement, svgUse);
}
svgVisualElement.InvalidateChildPaths();
_skCanvas.Save();
SetTransform(skMatrix);
SetClipPath(svgUse, _disposable);
var skPaintOpacity = SetOpacity(svgUse, _disposable);
var skPaintFilter = SetFilter(svgUse, _disposable);
if (svgVisualElement is SvgSymbol svgSymbol)
{
DrawSymbol(svgSymbol, ignoreDisplay);
}
else
{
Draw(svgVisualElement, ignoreDisplay);
}
if (skPaintFilter != null)
{
_skCanvas.Restore();
}
if (skPaintOpacity != null)
{
_skCanvas.Restore();
}
_skCanvas.Restore();
if (useParent != null)
{
useParent.SetValue(svgVisualElement, originalParent);
}
}
