public override void BeforeRender(WpfDrawingRenderer renderer)
{
base.BeforeRender(renderer);
_isTextPath = false;
_isGroupAdded = false;
_textWidth = 0;
_isMeasuring = false;
WpfDrawingContext context = renderer.Context;
SvgRenderingHint hint = _svgElement.RenderingHint;
if (hint == SvgRenderingHint.Clipping)
{
return;
}
// We do not directly render the contents of the clip-path, unless specifically requested...
if (string.Equals(_svgElement.ParentNode.LocalName, "clipPath") &&
!context.RenderingClipRegion)
{
return;
}
_context = renderer.Context;
SetQuality(context);
SetTransform(context);
SetClip(_context);
SetMask(_context);
_drawGroup = new DrawingGroup();
string sVisibility = _textElement.GetPropertyValue("visibility");
string sDisplay = _textElement.GetPropertyValue("display");
if (string.Equals(sVisibility, "hidden") || string.Equals(sDisplay, "none"))
{
_drawGroup.Opacity = 0;
}
string elementId = this.GetElementName();
if (!string.IsNullOrWhiteSpace(elementId) && !context.IsRegisteredId(elementId))
{
SvgObject.SetName(_drawGroup, elementId);
context.RegisterId(elementId);
if (context.IncludeRuntime)
{
SvgObject.SetId(_drawGroup, elementId);
}
}
string elementClass = this.GetElementClass();
if (!string.IsNullOrWhiteSpace(elementClass) && context.IncludeRuntime)
{
SvgObject.SetClass(_drawGroup, elementClass);
}
Transform textTransform = this.Transform;
if (textTransform != null && !textTransform.Value.IsIdentity)
{
_drawGroup.Transform = textTransform;
}
else
{
textTransform = null; // render any identity transform useless...
}
Geometry textClip = this.ClipGeometry;
if (textClip != null && !textClip.IsEmpty())
{
_drawGroup.ClipGeometry = textClip;
}
else
{
textClip = null; // render any empty geometry useless...
}
Brush textMask = this.Masking;
if (textMask != null)
{
_drawGroup.OpacityMask = textMask;
}
if (textTransform != null || textClip != null || textMask != null)
{
DrawingGroup curGroup = _context.Peek();
Debug.Assert(curGroup != null);
if (curGroup != null)
{
curGroup.Children.Add(_drawGroup);
context.Push(_drawGroup);
_isGroupAdded = true;
}
}
_drawContext = _drawGroup.Open();
_horzRenderer.Initialize(_drawContext, _context);
_vertRenderer.Initialize(_drawContext, _context);
_pathRenderer.Initialize(_drawContext, _context);
}
