/// <summary> /// Builds a PdfFormXObject from the specified brush. /// // If a gradient contains transparency, a soft mask is created an added to the specified graphic state. /// </summary> PdfFormXObject BuildForm(RadialGradientBrush brush, PathGeometry geometry) { PdfFormXObject pdfForm = Context.PdfDocument.Internals.CreateIndirectObject <PdfFormXObject>(); // HACK pdfForm.Elements.SetRectangle(PdfFormXObject.Keys.BBox, new PdfRectangle(0, 640, 480, 0)); // Transparency group of the form //<< // /I true // /K false // /S /Transparency // /Type /Group //>> PdfTransparencyGroupAttributes tgPrimaryForm = Context.PdfDocument.Internals.CreateIndirectObject <PdfTransparencyGroupAttributes>(); // not set by Acrobat: tgAttributes.Elements.SetName(PdfTransparencyGroupAttributes.Keys.CS, "/DeviceRGB"); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.I, true); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.K, false); pdfForm.Elements.SetReference(PdfFormXObject.Keys.Group, tgPrimaryForm); // Shading PdfShading shading = BuildShading(brush, 1, 1); // ExtGState //<< // /AIS false // /BM /Normal // /ca 1 // /CA 1 // /op false // /OP false // /OPM 1 // /SA true // /SMask 22 0 R // /Type /ExtGState //>> PdfExtGState pdfExtGState = Context.PdfDocument.Internals.CreateIndirectObject <PdfExtGState>(); pdfExtGState.SetDefault1(); // Soft mask PdfSoftMask softmask = BuildSoftMask(brush); pdfExtGState.Elements.SetReference(PdfExtGState.Keys.SMask, softmask); // PdfFormXObject //<< // /BBox [200.118 369.142 582.795 -141.094] // /Group 11 0 R // /Length 117 // /Matrix [1 0 0 1 0 0] // /Resources // << // /ColorSpace // << // /CS0 8 0 R // >> // /ExtGState // << // /GS0 23 0 R // >> // /Shading // << // /Sh0 14 0 R // >> // >> // /Subtype /Form //>> //stream //q //203.868 365.392 157.5 -97.5 re //W* n //q //0 g //1 i ///GS0 gs //0.75 0 0 -0.75 200.1181183 369.1417236 cm //BX /Sh0 sh EX Q //Q //endstream PdfContentWriter writer = new PdfContentWriter(Context, pdfForm); writer.BeginContentRaw(); // Acrobat 8 clips to bounding box, so we should do writer.WriteClip(geometry); //writer.WriteGraphicsState(extGState); //writer.WriteLiteral("0 g\n"); writer.WriteLiteral(writer.Resources.AddExtGState(pdfExtGState) + " gs\n"); XMatrix transform = new XMatrix(); //(brush.Viewport.Width / viewBoxForm.width, 0, 0, brush.Viewport.Height / viewBoxForm.height, 0, 0); writer.WriteMatrix(transform); writer.WriteLiteral("BX " + writer.Resources.AddShading(shading) + " sh EX\n"); writer.EndContent(); return(pdfForm); }
/// <summary> /// Builds a PdfFormXObject from the specified brush. /// // If a gradient contains transparency, a soft mask is created an added to the specified graphic state. /// </summary> PdfFormXObject BuildForm(RadialGradientBrush brush, PathGeometry geometry) { PdfFormXObject pdfForm = Context.PdfDocument.Internals.CreateIndirectObject<PdfFormXObject>(); // HACK pdfForm.Elements.SetRectangle(PdfFormXObject.Keys.BBox, new PdfRectangle(0, 640, 480, 0)); // Transparency group of the form //<< // /I true // /K false // /S /Transparency // /Type /Group //>> PdfTransparencyGroupAttributes tgPrimaryForm = Context.PdfDocument.Internals.CreateIndirectObject<PdfTransparencyGroupAttributes>(); // not set by Acrobat: tgAttributes.Elements.SetName(PdfTransparencyGroupAttributes.Keys.CS, "/DeviceRGB"); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.I, true); tgPrimaryForm.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.K, false); pdfForm.Elements.SetReference(PdfFormXObject.Keys.Group, tgPrimaryForm); // Shading PdfShading shading = BuildShading(brush, 1, 1); // ExtGState //<< // /AIS false // /BM /Normal // /ca 1 // /CA 1 // /op false // /OP false // /OPM 1 // /SA true // /SMask 22 0 R // /Type /ExtGState //>> PdfExtGState pdfExtGState = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>(); pdfExtGState.SetDefault1(); // Soft mask PdfSoftMask softmask = BuildSoftMask(brush); pdfExtGState.Elements.SetReference(PdfExtGState.Keys.SMask, softmask); // PdfFormXObject //<< // /BBox [200.118 369.142 582.795 -141.094] // /Group 11 0 R // /Length 117 // /Matrix [1 0 0 1 0 0] // /Resources // << // /ColorSpace // << // /CS0 8 0 R // >> // /ExtGState // << // /GS0 23 0 R // >> // /Shading // << // /Sh0 14 0 R // >> // >> // /Subtype /Form //>> //stream //q //203.868 365.392 157.5 -97.5 re //W* n //q //0 g //1 i ///GS0 gs //0.75 0 0 -0.75 200.1181183 369.1417236 cm //BX /Sh0 sh EX Q //Q //endstream PdfContentWriter writer = new PdfContentWriter(Context, pdfForm); writer.BeginContentRaw(); // Acrobat 8 clips to bounding box, so we should do writer.WriteClip(geometry); //writer.WriteGraphicsState(extGState); //writer.WriteLiteral("0 g\n"); writer.WriteLiteral(writer.Resources.AddExtGState(pdfExtGState) + " gs\n"); XMatrix transform = new XMatrix(); //(brush.Viewport.Width / viewBoxForm.width, 0, 0, brush.Viewport.Height / viewBoxForm.height, 0, 0); writer.WriteMatrix(transform); writer.WriteLiteral("BX " + writer.Resources.AddShading(shading) + " sh EX\n"); writer.EndContent(); return pdfForm; }