/// <summary>
/// Set brush
/// </summary>
/// <param name="AxialShading">Axial shading</param>
/// <param name="BrushOpacity">Brush opacity (0.0 to 1.0)</param>
public void SetBrush
(
PdfAxialShading AxialShading,
double BrushOpacity = 1.0
)
{
NonStroking = AxialShading;
this.BrushOpacity = BrushOpacity;
}
internal void Draw
(
PdfContents Contents,
double DrawRectX,
double DrawRectY,
double DrawRectWidth,
double DrawRectHeight,
ContentAlignment Alignment = (ContentAlignment)0
)
{
// save drawing rectangle in user coordinates
this.DrawRectX = DrawRectX;
this.DrawRectY = DrawRectY;
this.DrawRectWidth = DrawRectWidth;
this.DrawRectHeight = DrawRectHeight;
// test arguments
if (DrawRectWidth == 0 && DrawRectHeight == 0 || DrawRectWidth == 0 && PathBBoxWidth != 0 || DrawRectHeight == 0 && PathBBoxHeight != 0)
{
throw new ApplicationException("DrawWPFPath: Drawing rectangle is empty");
}
// set transformation matrix
SetTransformation(Alignment);
// clip
if (Stroking == null && NonStroking == null)
{
// build clipping path
BuildPath(Contents, FillRule == FillRule.EvenOdd ? PaintOp.ClipPathEor : PaintOp.ClipPathWnr);
return;
}
// paint operator
PaintOp PaintOperator;
// brush is defined as shading
if (NonStroking != null && (NonStroking.GetType() == typeof(SysMedia.LinearGradientBrush) || NonStroking.GetType() == typeof(SysMedia.RadialGradientBrush) ||
NonStroking.GetType() == typeof(PdfAxialShading) || NonStroking.GetType() == typeof(PdfRadialShading)))
{
// save graphics state
Contents.SaveGraphicsState();
// build clipping path
BuildPath(Contents, FillRule == FillRule.EvenOdd ? PaintOp.ClipPathEor : PaintOp.ClipPathWnr);
// set bland mode
if (BlendMode != BlendMode.Normal)
{
Contents.SetBlendMode(BlendMode);
}
// set opacity
Contents.SetAlphaNonStroking(BrushOpacity);
// draw linera gradient brush shading bounded by clip path
if (NonStroking.GetType() == typeof(SysMedia.LinearGradientBrush))
{
PdfAxialShading AxialShading = new PdfAxialShading(Contents.Document, (SysMedia.LinearGradientBrush)NonStroking);
AxialShading.SetBoundingBox(DrawRectX, DrawRectY, DrawRectWidth, DrawRectHeight);
Contents.DrawShading(AxialShading);
}
// draw axial shading bounded by clip path
else if (NonStroking.GetType() == typeof(PdfAxialShading))
{
((PdfAxialShading)NonStroking).SetBoundingBox(DrawRectX, DrawRectY, DrawRectWidth, DrawRectHeight);
Contents.DrawShading((PdfAxialShading)NonStroking);
}
// draw radial gradient brush shading bounded by clip path
else if (NonStroking.GetType() == typeof(SysMedia.RadialGradientBrush))
{
PdfRadialShading RadialShading = new PdfRadialShading(Contents.Document, (SysMedia.RadialGradientBrush)NonStroking);
RadialShading.SetBoundingBox(DrawRectX, DrawRectY, DrawRectWidth, DrawRectHeight);
Contents.DrawShading(RadialShading);
}
// draw radial shading bounded by clip path
else
{
((PdfRadialShading)NonStroking).SetBoundingBox(DrawRectX, DrawRectY, DrawRectWidth, DrawRectHeight);
Contents.DrawShading((PdfRadialShading)NonStroking);
}
// remove clipping path
Contents.RestoreGraphicsState();
// no pen defined
if (Stroking == null)
{
return;
}
// pen is defined
PaintOperator = PaintOp.Stroke;
}
// set paint operator for all other cases (no shading)
else
{
// we have pen and no brush
if (NonStroking == null)
{
PaintOperator = PaintOp.Stroke;
}
// we have brush but no pen
else if (Stroking == null)
{
PaintOperator = FillRule == FillRule.EvenOdd ? PaintOp.FillEor : PaintOp.Fill;
}
// we have brush and pen
else
{
PaintOperator = FillRule == FillRule.EvenOdd ? PaintOp.CloseFillStrokeEor: PaintOp.CloseFillStroke;
}
}
// save graphics state
Contents.SaveGraphicsState();
// set bland mode
if (BlendMode != BlendMode.Normal)
{
Contents.SetBlendMode(BlendMode);
}
// stroking (pen) is defined
if (Stroking != null)
{
if (Stroking.GetType() == typeof(Color))
{
// pen color
Contents.SetColorStroking((Color)Stroking);
// set opacity
if (PenOpacity != 1.0)
{
Contents.SetAlphaStroking(PenOpacity);
}
// pen width
if (PenWidth >= 0)
{
Contents.SetLineWidth(PenWidth);
}
// line cap
if (LineCap != (PdfLineCap)(-1))
{
Contents.SetLineCap(LineCap);
}
// line join
if (LineJoin != (PdfLineJoin)(-1))
{
Contents.SetLineJoin(LineJoin);
}
// Miter
if (MiterLimit != -1)
{
Contents.SetMiterLimit(MiterLimit);
}
// line is made of dashes
if (DashArray != null)
{
Contents.SetDashLine(DashArray, DashPhase);
}
}
else if (Stroking.GetType() == typeof(SysMedia.Pen))
{
// media pen short cut
SysMedia.Pen Pen = (SysMedia.Pen)Stroking;
// media brush shortcut
SysMedia.SolidColorBrush Brush = (SysMedia.SolidColorBrush)Pen.Brush;
// media pen color short cut
SysMedia.Color PenColor = Brush.Color;
// pen color
Contents.SetColorStroking(Color.FromArgb(PenColor.R, PenColor.G, PenColor.B));
// pen opacity
if (PenColor.A != 255 || Brush.Opacity != 1.0)
{
Contents.SetAlphaStroking((PenColor.A / 255.0) * Brush.Opacity);
}
// pen thickness converted to user units
double Thickness = Pen.Thickness * Math.Max(Math.Abs(ScaleX), Math.Abs(ScaleY));
Contents.SetLineWidth(Thickness);
// line cap
// Note: PDF line cap is the same for start and end. We will ignore EndLineCap
// Triangle line cap will be round
switch (Pen.StartLineCap)
{
case SysMedia.PenLineCap.Flat: Contents.SetLineCap(PdfLineCap.Butt); break;
case SysMedia.PenLineCap.Square: Contents.SetLineCap(PdfLineCap.Square); break;
default: Contents.SetLineCap(PdfLineCap.Round); break;
}
// line join
switch (Pen.LineJoin)
{
case SysMedia.PenLineJoin.Bevel: Contents.SetLineJoin(PdfLineJoin.Bevel); break;
case SysMedia.PenLineJoin.Miter: Contents.SetLineJoin(PdfLineJoin.Miter); break;
default: Contents.SetLineJoin(PdfLineJoin.Round); break;
}
// Miter
Contents.SetMiterLimit(Pen.MiterLimit);
// dash pattern
if (Pen.DashStyle.Dashes.Count > 0)
{
int End = Pen.DashStyle.Dashes.Count;
double[] PenDashArray = new double[End];
for (int Index = 0; Index < End; Index++)
{
PenDashArray[Index] = Thickness * Pen.DashStyle.Dashes[Index];
}
Contents.SetDashLine(PenDashArray, Thickness * Pen.DashStyle.Offset);
}
}
}
// non-stroking (brush) is defined
// note shading brush was handled above
if (NonStroking != null)
{
// set opacity
if (BrushOpacity != 1.0)
{
Contents.SetAlphaNonStroking(BrushOpacity);
}
// brush color
if (NonStroking.GetType() == typeof(Color))
{
Contents.SetColorNonStroking((Color)NonStroking);
}
else if (NonStroking.GetType() == typeof(PdfTilingPattern))
{
Contents.SetPatternNonStroking((PdfTilingPattern)NonStroking);
}
}
// build path
BuildPath(Contents, PaintOperator);
// restore graphics state
Contents.RestoreGraphicsState();
return;
}
////////////////////////////////////////////////////////////////////
/// <summary>
/// Draw axial shading pattern
/// </summary>
/// <param name="Shading">Axial shading resource</param>
////////////////////////////////////////////////////////////////////
public void DrawShading(
PdfAxialShading Shading
)
{
AddToUsedResources(Shading);
ContentsString.AppendFormat("{0} sh\n", Shading.ResourceCode);
return;
}