private static Rect GetMaskDestRect(SvgMaskElement maskElement, Rect bounds)
{
Rect result = new Rect(0, 0, 0, 0);
result.X = CalcPatternUnit(maskElement, maskElement.X.AnimVal as SvgLength,
SvgLengthDirection.Horizontal, bounds);
result.Y = CalcPatternUnit(maskElement, maskElement.Y.AnimVal as SvgLength,
SvgLengthDirection.Vertical, bounds);
result.Width = CalcPatternUnit(maskElement, maskElement.Width.AnimVal as SvgLength,
SvgLengthDirection.Horizontal, bounds);
result.Height = CalcPatternUnit(maskElement, maskElement.Height.AnimVal as SvgLength,
SvgLengthDirection.Vertical, bounds);
return(result);
}
private static double CalcPatternUnit(SvgMaskElement maskElement, SvgLength length,
SvgLengthDirection dir, Rect bounds)
{
if (maskElement.MaskUnits.AnimVal.Equals((ushort)SvgUnitType.UserSpaceOnUse))
{
return(length.Value);
}
double calcValue = length.ValueInSpecifiedUnits;
if (dir == SvgLengthDirection.Horizontal)
{
calcValue *= bounds.Width;
}
else
{
calcValue *= bounds.Height;
}
if (length.UnitType == SvgLengthType.Percentage)
{
calcValue /= 100F;
}
return(calcValue);
}
public virtual void VisitMaskElement(SvgMaskElement element) => DefaultVisit(element);
protected void SetMask(WpfDrawingContext context)
{
_maskUnits = SvgUnitType.UserSpaceOnUse;
_maskContentUnits = SvgUnitType.UserSpaceOnUse;
CssPrimitiveValue maskPath = _svgElement.GetComputedCssValue("mask", string.Empty) as CssPrimitiveValue;
SvgMaskElement maskElement = null;
if (maskPath != null && maskPath.PrimitiveType == CssPrimitiveType.Uri)
{
string absoluteUri = _svgElement.ResolveUri(maskPath.GetStringValue());
maskElement = _svgElement.OwnerDocument.GetNodeByUri(absoluteUri) as SvgMaskElement;
}
else if (string.Equals(_svgElement.ParentNode.LocalName, "use"))
{
var parentElement = _svgElement.ParentNode as SvgElement;
maskPath = parentElement.GetComputedCssValue("mask", string.Empty) as CssPrimitiveValue;
if (maskPath != null && maskPath.PrimitiveType == CssPrimitiveType.Uri)
{
string absoluteUri = _svgElement.ResolveUri(maskPath.GetStringValue());
maskElement = _svgElement.OwnerDocument.GetNodeByUri(absoluteUri) as SvgMaskElement;
}
}
if (maskElement != null)
{
WpfDrawingRenderer renderer = new WpfDrawingRenderer();
renderer.Window = _svgElement.OwnerDocument.Window as SvgWindow;
WpfDrawingSettings settings = context.Settings.Clone();
settings.TextAsGeometry = true;
WpfDrawingContext maskContext = new WpfDrawingContext(true, settings);
//maskContext.Initialize(null, context.FontFamilyVisitor, null);
maskContext.Initialize(context.LinkVisitor, context.FontFamilyVisitor, context.ImageVisitor);
renderer.RenderMask(maskElement, maskContext);
DrawingGroup maskDrawing = renderer.Drawing;
Rect bounds = new Rect(0, 0, 1, 1);
//Rect destRect = GetMaskDestRect(maskElement, bounds);
//destRect = bounds;
//DrawingImage drawImage = new DrawingImage(image);
//DrawingVisual drawingVisual = new DrawingVisual();
//DrawingContext drawingContext = drawingVisual.RenderOpen();
//drawingContext.DrawDrawing(image);
//drawingContext.Close();
//RenderTargetBitmap drawImage = new RenderTargetBitmap((int)200,
// (int)200, 96, 96, PixelFormats.Pbgra32);
//drawImage.Render(drawingVisual);
//ImageBrush imageBrush = new ImageBrush(drawImage);
//imageBrush.Viewbox = image.Bounds;
//imageBrush.Viewport = image.Bounds;
//imageBrush.ViewboxUnits = BrushMappingMode.Absolute;
//imageBrush.ViewportUnits = BrushMappingMode.Absolute;
//imageBrush.TileMode = TileMode.None;
//imageBrush.Stretch = Stretch.None;
//this.Masking = imageBrush;
DrawingBrush maskBrush = new DrawingBrush(maskDrawing);
//tb.Viewbox = new Rect(0, 0, destRect.Width, destRect.Height);
//tb.Viewport = new Rect(0, 0, destRect.Width, destRect.Height);
maskBrush.Viewbox = maskDrawing.Bounds;
maskBrush.Viewport = maskDrawing.Bounds;
maskBrush.ViewboxUnits = BrushMappingMode.Absolute;
maskBrush.ViewportUnits = BrushMappingMode.Absolute;
maskBrush.TileMode = TileMode.None;
maskBrush.Stretch = Stretch.Uniform;
////maskBrush.AlignmentX = AlignmentX.Center;
////maskBrush.AlignmentY = AlignmentY.Center;
this.Masking = maskBrush;
_maskUnits = (SvgUnitType)maskElement.MaskUnits.AnimVal;
_maskContentUnits = (SvgUnitType)maskElement.MaskContentUnits.AnimVal;
}
}
