/// <summary>
/// Parses a Path element.
/// </summary>
Path ParsePath()
{
Debug.Assert(this.reader.Name == "Path");
bool isEmptyElement = this.reader.IsEmptyElement;
Path path = new Path();
while (MoveToNextAttribute())
{
switch (this.reader.Name)
{
case "Data":
path.Data = ParsePathGeometry(this.reader.Value);
break;
case "Fill":
path.Fill = ParseBrush(this.reader.Value);
break;
case "RenderTransform":
path.RenderTransform = ParseMatrixTransform(this.reader.Value);
break;
case "Clip":
path.Clip = ParsePathGeometry(this.reader.Value);
break;
case "Opacity":
path.Opacity = ParseDouble(this.reader.Value);
break;
case "OpacityMask":
path.OpacityMask = ParseBrush(this.reader.Value);
break;
case "Stroke":
path.Stroke = ParseBrush(this.reader.Value);
break;
case "StrokeDashArray":
path.StrokeDashArray = reader.Value;
break;
case "StrokeDashCap":
path.StrokeDashCap = reader.Value;
break;
case "StrokeDashOffset":
path.StrokeDashOffset = ParseDouble(reader.Value);
break;
case "StrokeEndLineCap":
path.StrokeEndLineCap = ParseEnum<LineCap>(this.reader.Value);
break;
case "StrokeStartLineCap":
path.StrokeStartLineCap = ParseEnum<LineCap>(this.reader.Value);
break;
case "StrokeLineJoin":
path.StrokeLineJoin = ParseEnum<LineJoin>(this.reader.Value);
break;
case "StrokeMiterLimit":
path.StrokeMiterLimit = ParseDouble(this.reader.Value);
break;
case "StrokeThickness":
path.StrokeThickness = ParseDouble(this.reader.Value);
break;
case "Name":
path.Name = this.reader.Value;
break;
case "FixedPage_NavigateUri":
case "FixedPage.NavigateUri":
path.FixedPage_NavigateUri = reader.Value;
break;
case "AutomationProperties_Name":
path.AutomationProperties_Name = this.reader.Value;
break;
case "AutomationProperties.HelpText":
path.AutomationProperties_HelpText = this.reader.Value;
break;
case "SnapsToDevicePixels":
path.SnapsToDevicePixels = ParseBool(this.reader.Value);
break;
case "xml:lang":
path.lang = this.reader.Value;
break;
case "x:Key":
path.Key = this.reader.Value;
break;
case "xml:id":
break;
case "xml:space":
break;
default:
UnexpectedAttribute(this.reader.Name);
break;
}
}
if (!isEmptyElement)
{
MoveToNextElement();
while (this.reader.IsStartElement())
{
switch (this.reader.Name)
{
case "Path.RenderTransform":
MoveToNextElement();
path.RenderTransform = ParseMatrixTransform();
break;
case "Path.Clip":
MoveToNextElement();
path.Clip = ParsePathGeometry();
MoveToNextElement();
break;
case "Path.OpacityMask":
MoveToNextElement();
path.OpacityMask = ParseBrush();
path.OpacityMask.Parent = path;
MoveToNextElement();
break;
case "Path.Fill":
MoveToNextElement();
path.Fill = ParseBrush();
path.Fill.Parent = path;
MoveToNextElement();
break;
case "Path.Stroke":
MoveToNextElement();
path.Fill = ParseBrush();
path.Fill.Parent = path;
MoveToNextElement();
break;
case "Path.Data":
MoveToNextElement();
path.Data = ParsePathGeometry();
MoveToNextElement();
break;
default:
Debugger.Break();
break;
}
}
}
MoveToNextElement();
return path;
}
/// <summary>
/// Strokes the path geometry with the Stroke brush.
/// </summary>
private void WriteStrokeGeometry(Path path)
{
if (path.Stroke == null)
return;
SolidColorBrush sBrush;
LinearGradientBrush lgBrush;
RadialGradientBrush rgBrush;
VisualBrush vBrush;
ImageBrush iBrush;
//if (path.Stroke != null && this.renderMode == RenderMode.Default) // HACK
if ((sBrush = path.Stroke as SolidColorBrush) != null)
{
RealizeStroke(path);
WriteGeometry(path.Data);
WriteLiteral("S\n");
}
else if ((lgBrush = path.Stroke as LinearGradientBrush) != null)
{
PdfExtGState xgState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
xgState.SetDefault1();
double opacity = Opacity * lgBrush.Opacity; ;
if (opacity < 1)
{
xgState.StrokeAlpha = opacity;
xgState.NonStrokeAlpha = opacity;
}
RealizeExtGState(xgState);
// /CS1 CS /P0 SCN
// 7.5 w
// q 1 0 0 1 15.5 462.9 cm
// 0 0 m
// 153 0 l
// 153 -93 l
// 0 -93 l
// h
// S
// Q
if (lgBrush.GradientStops.HasTransparency)
{
// TODO: Create Form
PdfShadingPattern pattern = LinearShadingBuilder.BuildPatternFromLinearGradientBrush(Context, lgBrush, Transform);
string paName = Resources.AddPattern(pattern);
WriteLiteral("/Pattern CS " + paName + " SCN\n");
WriteLiteral("q {0:0.###} w", path.StrokeThickness);
WriteGeometry(path.Data);
WriteLiteral("S Q\n");
//// Create a FormXObject with a soft mask
//PdfFormXObject form = LinearShadingBuilder.BuildFormFromLinearGradientBrush(Context, lgBrush, path.Data);
//string foName = Resources.AddForm(form);
//WriteLiteral(foName + " Do\n");
}
else
{
PdfShadingPattern pattern = LinearShadingBuilder.BuildPatternFromLinearGradientBrush(Context, lgBrush, Transform);
string paName = Resources.AddPattern(pattern);
WriteLiteral("/Pattern CS " + paName + " SCN\n");
WriteLiteral("q {0:0.###} w", path.StrokeThickness);
WriteGeometry(path.Data);
WriteLiteral("S Q\n");
}
}
else if ((rgBrush = path.Stroke as RadialGradientBrush) != null)
{
// HACK
WriteLiteral("/DeviceRGB CS 0 1 0 RG\n");
WriteLiteral("q {0:0.###} w", path.StrokeThickness);
WriteGeometry(path.Data);
WriteLiteral("S Q\n");
}
else if ((iBrush = path.Stroke as ImageBrush) != null)
{
// HACK
WriteLiteral("/DeviceRGB CS 0 1 0 RG\n");
WriteLiteral("q {0:0.###} w", path.StrokeThickness);
WriteGeometry(path.Data);
WriteLiteral("S Q\n");
}
else if ((vBrush = path.Stroke as VisualBrush) != null)
{
// HACK
WriteLiteral("/DeviceRGB CS 0 1 0 RG\n");
WriteLiteral("q {0:0.###} w", path.StrokeThickness);
WriteGeometry(path.Data);
WriteLiteral("S Q\n");
}
else
Debug.Assert(false);
}
/// <summary>
/// Writes the path fill and/or stroke operators to the content stream.
/// </summary>
internal void WritePathFillStroke(Path path)
{
if (path.Data.FillRule == FillRule.NonZero) // NonZero means Winding
{
if (path.Fill != null && path.Stroke != null)
WriteLiteral("B\n");
else if (path.Stroke != null)
WriteLiteral("S\n");
else
WriteLiteral("f\n");
}
else
{
if (path.Fill != null && path.Stroke != null)
WriteLiteral("B*\n");
else if (path.Stroke != null)
WriteLiteral("S\n");
else
WriteLiteral("f*\n");
}
}
/// <summary>
/// Writes a Path to the content stream.
/// </summary>
private void WritePath(Path path)
{
WriteSaveState("begin Path", path.Name);
// Transform also affects clipping and opacity mask
if (path.RenderTransform != null && this.renderMode == RenderMode.Default)
{
MultiplyTransform(path.RenderTransform);
WriteRenderTransform(path.RenderTransform);
}
if (path.Clip != null && this.renderMode == RenderMode.Default)
WriteClip(path.Clip);
if (path.Opacity < 1)
MultiplyOpacity(path.Opacity);
if (path.OpacityMask != null)
WriteOpacityMask(path.OpacityMask);
if (path.Fill == null)
{
if (path.Stroke != null)
{
#if true
WriteStrokeGeometry(path);
#else
// Just stroke the path
RealizeStroke(path);
WriteGeometry(path.Data);
WritePathFillStroke(path);
#endif
}
else
Debug.Assert(false, "??? Path with neither Stroke nor Fill encountered.");
}
else
{
SolidColorBrush sBrush;
LinearGradientBrush lgBrush;
RadialGradientBrush rgBrush;
ImageBrush iBrush;
VisualBrush vBrush;
if ((sBrush = path.Fill as SolidColorBrush) != null)
{
Color color = sBrush.Color;
double opacity = Opacity * color.ScA;
if (opacity < 1)
RealizeFillOpacity(opacity);
WriteRgb(color, " rg\n");
if (path.Stroke != null)
RealizeStroke(path);
WriteGeometry(path.Data);
WritePathFillStroke(path);
}
else if ((lgBrush = path.Fill as LinearGradientBrush) != null)
{
// TODO: For better visual compatibility use a Shading Pattern if Opacity is not 1 and
// the Stroke Style is not solid. Acrobat 8 ignores this case.
PdfExtGState xgState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
xgState.SetDefault1();
double opacity = Opacity * lgBrush.Opacity; ;
if (opacity < 1)
{
xgState.StrokeAlpha = opacity;
xgState.NonStrokeAlpha = opacity;
}
RealizeExtGState(xgState);
// 1st draw fill
if (lgBrush.GradientStops.HasTransparency)
{
// Create a FormXObject with a soft mask
PdfFormXObject form = LinearShadingBuilder.BuildFormFromLinearGradientBrush(Context, lgBrush, path.Data);
string foName = Resources.AddForm(form);
WriteLiteral(foName + " Do\n");
}
else
{
// Create just a shading
PdfShading shading = LinearShadingBuilder.BuildShadingFromLinearGradientBrush(Context, lgBrush);
string shName = Resources.AddShading(shading);
WriteLiteral("q\n");
WriteClip(path.Data);
WriteLiteral("BX " + shName + " sh EX Q\n");
}
// 2nd draw stroke
if (path.Stroke != null)
WriteStrokeGeometry(path);
}
else if ((rgBrush = path.Fill as RadialGradientBrush) != null)
{
PdfExtGState xgState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
xgState.SetDefault1();
double avGradientOpacity = rgBrush.GradientStops.GetAverageAlpha(); // HACK
double opacity = Opacity * rgBrush.Opacity * avGradientOpacity;
if (opacity < 1)
{
xgState.StrokeAlpha = opacity;
xgState.NonStrokeAlpha = opacity;
}
//RealizeExtGState(xgState);
#if true
XRect boundingBox = path.Data.GetBoundingBox();
// Always creates a pattern, because the background must be filled
PdfShadingPattern pattern = RadialShadingBuilder.BuildFromRadialGradientBrush(Context, rgBrush, boundingBox, Transform);
string paName = Resources.AddPattern(pattern);
// stream
// /CS0 cs /P0 scn
// /GS0 gs
// 0 480 180 -90 re
// f*
// endstream
// endobj
WriteLiteral("/Pattern cs " + paName + " scn\n");
// move to here: RealizeExtGState(xgState);
RealizeExtGState(xgState);
WriteGeometry(path.Data);
if (path.Data.FillRule == FillRule.NonZero) // NonZero means Winding
WriteLiteral("f\n");
else
WriteLiteral("f*\n");
#else
#if true
// 1st draw fill
if (rgBrush.GradientStops.HasTransparentColors)
{
// Create a FormXObject with a soft mask
PdfFormXObject form = ShadingBuilder.BuildFormFromRadialGradientBrush(Context, rgBrush, path.Data);
string foName = Resources.AddForm(form);
WriteLiteral(foName + " Do\n");
}
else
{
// Create just a shading
PdfShading shading = ShadingBuilder.BuildShadingFromRadialGradientBrush(Context, rgBrush);
string shName = Resources.AddShading(shading);
WriteLiteral("q\n");
WriteClip(path.Data);
WriteLiteral("BX " + shName + " sh EX Q\n");
}
#else
// Establish graphic state dictionary
PdfExtGState extGState = new PdfExtGState(Context.PdfDocument);
Context.PdfDocument.Internals.AddObject(extGState);
string gsName = Resources.AddExtGState(extGState);
WriteLiteral(gsName + " gs\n");
// 1st draw fill
PdfShading shading = ShadingBuilder.BuildFormFromRadialGradientBrush(Context, rgBrush); //, extGState);
string shName = Resources.AddShading(shading);
WriteClip(path.Data);
WriteLiteral("BX " + shName + " sh EX\n");
#endif
#endif
// 2nd draw stroke
if (path.Stroke != null)
WriteStrokeGeometry(path);
}
else if ((iBrush = path.Fill as ImageBrush) != null)
{
PdfExtGState xgState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
xgState.SetDefault1();
double opacity = Opacity * iBrush.Opacity;
if (opacity < 1)
{
xgState.StrokeAlpha = opacity;
xgState.NonStrokeAlpha = opacity;
}
RealizeExtGState(xgState);
// 1st draw fill
PdfTilingPattern pattern = TilingPatternBuilder.BuildFromImageBrush(Context, iBrush, Transform);
string name = Resources.AddPattern(pattern);
WriteLiteral("/Pattern cs " + name + " scn\n");
WriteGeometry(path.Data);
WritePathFillStroke(path);
// 2nd draw stroke
if (path.Stroke != null)
WriteStrokeGeometry(path);
}
else if ((vBrush = path.Fill as VisualBrush) != null)
{
PdfExtGState xgState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>();
xgState.SetDefault1();
double opacity = Opacity * vBrush.Opacity;
if (opacity < 1)
{
xgState.StrokeAlpha = opacity;
xgState.NonStrokeAlpha = opacity;
}
RealizeExtGState(xgState);
// 1st draw fill
PdfTilingPattern pattern = TilingPatternBuilder.BuildFromVisualBrush(Context, vBrush, Transform);
string name = Resources.AddPattern(pattern);
WriteLiteral("/Pattern cs " + name + " scn\n");
WriteGeometry(path.Data);
WritePathFillStroke(path);
// 2nd draw stroke
if (path.Stroke != null)
WriteStrokeGeometry(path);
}
else
{
Debug.Assert(false, "Unknown brush type encountered.");
}
}
WriteRestoreState("end Path", path.Name);
}
/// <summary>
/// Makes the specified pen to the current graphics object.
/// </summary>
public void RealizeStroke(Path path)
{
this.graphicsState.RealizeStroke(path);
}
void AddCapToPath(Path path, PathFigure figure, double length, double lineWidthHalf, LineCap lineCap, XMatrix matrix)
{
// sketch:
// 1. create Transform that make a horizontal line with start in 0,0
// 2. create a Polygon with the shape of the line including its caps
// 3. render the shape with the brush of the pen
//PolyLineSegment seg;
switch (lineCap)
{
case LineCap.Flat:
matrix.Transform(new XPoint(length + lineWidthHalf, -lineWidthHalf));
break;
case LineCap.Square:
matrix.Transform(new XPoint(length + lineWidthHalf, -lineWidthHalf));
break;
case LineCap.Round:
break;
case LineCap.Triangle:
break;
}
}
/// <summary>
/// If the path is a single line with different start and end caps, convert the line into an area.
/// </summary>
private bool WriteSingleLineStrokeWithSpecialCaps(Path path)
{
if (path.StrokeStartLineCap == path.StrokeEndLineCap && path.StrokeStartLineCap != LineCap.Triangle)
return false;
if (path.Data.Figures.Count != 1)
return false;
PathFigure figure = path.Data.Figures[0];
if (figure.Segments.Count != 1)
return false;
PolyLineSegment polyLineSegment = figure.Segments[0] as PolyLineSegment;
if (polyLineSegment.Points.Count != 1)
return false;
// TODO: Create a new path that draws the line
path.GetType();
return false;
}
/// <summary>
/// Parses a Canvas element.
/// </summary>
Canvas ParseCanvas()
{
Debug.Assert(this.reader.Name == "Canvas");
Canvas canvas = new Canvas();
try
{
bool isEmptyElement = this.reader.IsEmptyElement;
while (MoveToNextAttribute())
{
switch (this.reader.Name)
{
case "Name":
canvas.Name = this.reader.Value;
break;
case "RenderTransform":
canvas.RenderTransform = ParseMatrixTransform(this.reader.Value);
break;
case "Clip":
canvas.Clip = ParsePathGeometry(this.reader.Value);
break;
case "Opacity":
canvas.Opacity = ParseDouble(this.reader.Value);
break;
case "OpacityMask":
canvas.OpacityMask = ParseBrush(this.reader.Value);
break;
case "RenderOptions.EdgeMode":
canvas.RenderOptions_EdgeMode = this.reader.Value;
break;
case "FixedPage.NavigateUri":
canvas.FixedPage_NavigateUri = this.reader.Value;
break;
case "AutomationProperties.HelpText":
canvas.AutomationProperties_HelpText = this.reader.Value;
break;
case "AutomationProperties.Name":
canvas.AutomationProperties_Name = this.reader.Value;
break;
case "xml:lang":
canvas.lang = this.reader.Value;
break;
case "xmlns:x":
break;
default:
UnexpectedAttribute(this.reader.Name);
break;
}
}
if (!isEmptyElement)
{
MoveToNextElement();
while (this.reader.IsStartElement())
{
switch (this.reader.Name)
{
case "Canvas.Resources":
MoveToNextElement();
ResourceDictionary rd = new ResourceDictionary();
canvas.Resources = rd;
rd.Parent = canvas;
rd.ResourceParent = ResourceDictionaryStack.Current;
ResourceDictionaryStack.Push(rd);
ParseResourceDictionary(rd);
MoveToNextElement();
break;
case "Canvas.RenderTransform":
MoveToNextElement();
canvas.RenderTransform = ParseMatrixTransform();
MoveToNextElement();
break;
case "Canvas.Clip":
MoveToNextElement();
canvas.Clip = ParsePathGeometry();
break;
case "Canvas.OpacityMask":
MoveToNextElement();
canvas.OpacityMask = ParseBrush();
canvas.OpacityMask.Parent = canvas;
break;
case "Path":
{
PdfSharp.Xps.XpsModel.Path path = ParsePath();
#if DEBUG
if (!String.IsNullOrEmpty(path.Name))
{
Debug.WriteLine("Path: " + path.Name);
}
#endif
canvas.Content.Add(path);
path.Parent = canvas;
}
break;
case "Glyphs":
{
PdfSharp.Xps.XpsModel.Glyphs glyphs = ParseGlyphs();
canvas.Content.Add(glyphs);
glyphs.Parent = canvas;
}
break;
case "Canvas":
{
PdfSharp.Xps.XpsModel.Canvas canvas2 = ParseCanvas();
canvas.Content.Add(canvas2);
canvas2.Parent = canvas;
}
break;
case "mc:AlternateContent":
case "mc:Choice":
MoveToNextElement();
//canvas.Content.Add(ParseCanvas());
break;
default:
Debugger.Break();
break;
}
}
}
MoveToNextElement();
}
finally
{
// If the current ResourceDictionary is from this Canvas, pop it.
if (canvas != null && canvas.Resources != null)
{
if (Object.ReferenceEquals(canvas.Resources, ResourceDictionaryStack.Current))
{
ResourceDictionaryStack.Pop();
}
}
}
return(canvas);
}
