protected XPRadialGradientBrush(RadialGradientBrush brush) : base(brush) { }
void RealizeRadialGradientBrush(RadialGradientBrush brush, XForm xform) { XMatrix matrix = new XMatrix(); // this.renderer.defaultViewMatrix; //matrix.MultiplyPrepend(this.Transform); matrix = this.currentTransform; //matrix.MultiplyPrepend(XMatrix.CreateScaling(1.3, 1)); PdfShadingPattern pattern = new PdfShadingPattern(this.writer.Owner); pattern.Elements[PdfShadingPattern.Keys.PatternType] = new PdfInteger(2); // shading pattern // Setup shading PdfShading shading = new PdfShading(this.writer.Owner); PdfColorMode colorMode = PdfColorMode.Rgb; //this.document.Options.ColorMode; PdfDictionary function = BuildShadingFunction(brush.GradientStops, colorMode); shading.Elements[PdfShading.Keys.ShadingType] = new PdfInteger(3); // Radial shading //if (colorMode != PdfColorMode.Cmyk) shading.Elements[PdfShading.Keys.ColorSpace] = new PdfName("/DeviceRGB"); //else //shading.Elements[Keys.ColorSpace] = new PdfName("/DeviceCMYK"); double x0 = brush.GradientOrigin.X; double y0 = brush.GradientOrigin.Y; double r0 = 0; double x1 = brush.Center.X; double y1 = brush.Center.Y; double r1 = brush.RadiusX; shading.Elements[PdfShading.Keys.Coords] = new PdfLiteral("[{0:0.###} {1:0.###} {2:0.###} {3:0.###} {4:0.###} {5:0.###}]", x0, y0, r0, x1, y1, r1); // old: Elements[Keys.Background] = new PdfRawItem("[0 1 1]"); // old: Elements[Keys.Domain] = shading.Elements[PdfShading.Keys.Function] = function; shading.Elements[PdfShading.Keys.Extend] = new PdfLiteral("[true true]"); // Setup pattern pattern.Elements[PdfShadingPattern.Keys.Shading] = shading; pattern.Elements[PdfShadingPattern.Keys.Matrix] = PdfLiteral.FromMatrix(matrix); // new PdfLiteral("[" + PdfEncoders.ToString(matrix) + "]"); string name = this.writer.Resources.AddPattern(pattern); this.writer.WriteLiteral("/Pattern cs\n", name); this.writer.WriteLiteral("{0} scn\n", name); double alpha = brush.Opacity * brush.GradientStops.GetAverageAlpha(); if (alpha < 1) { #if true PdfExtGState extGState = this.writer.Owner.ExtGStateTable.GetExtGStateNonStroke(alpha); string gs = this.writer.Resources.AddExtGState(extGState); this.writer.WriteLiteral("{0} gs\n", gs); #else if (xform == null) { PdfExtGState extGState = this.writer.Owner.ExtGStateTable.GetExtGStateNonStroke(alpha); string gs = this.writer.Resources.AddExtGState(extGState); this.writer.WriteGraphicState(extGState); } else { //PdfFormXObject pdfForm = this.writer.Owner.FormTable.GetForm(form); PdfFormXObject pdfForm = xform.pdfForm; pdfForm.Elements.SetString("/@", "This is the Form XObject of the soft mask"); string formName = this.writer.Resources.AddForm(pdfForm); PdfTransparencyGroupAttributes tgAttributes = new PdfTransparencyGroupAttributes(this.writer.Owner); //this.writer.Owner.Internals.AddObject(tgAttributes); tgAttributes.Elements.SetName(PdfTransparencyGroupAttributes.Keys.CS, "/DeviceRGB"); // Set reference to transparency group attributes pdfForm.Elements.SetObject(PdfFormXObject.Keys.Group, tgAttributes); pdfForm.Elements[PdfFormXObject.Keys.Matrix] = new PdfLiteral("[1.001 0 0 1.001 0.001 0.001]"); PdfSoftMask softmask = new PdfSoftMask(this.writer.Owner); this.writer.Owner.Internals.AddObject(softmask); softmask.Elements.SetString("/@", "This is the soft mask"); softmask.Elements.SetName(PdfSoftMask.Keys.S, "/Luminosity"); softmask.Elements.SetReference(PdfSoftMask.Keys.G, pdfForm); //pdfForm.Elements.SetName(PdfFormXObject.Keys.Type, "Group"); //pdfForm.Elements.SetName(PdfFormXObject.Keys.ss.Ss.Type, "Group"); PdfExtGState extGState = new PdfExtGState(this.writer.Owner); this.writer.Owner.Internals.AddObject(extGState); extGState.Elements.SetReference(PdfExtGState.Keys.SMask, softmask); this.writer.WriteGraphicState(extGState); } #endif } }
/// <summary> /// Builds the soft mask. /// </summary> PdfSoftMask BuildSoftMask(RadialGradientBrush brush) { Debug.Assert(brush.GradientStops.HasTransparency); XRect viewBox = new XRect(0, 0, 360, 480); // HACK //XForm xform = new XForm(Context.PdfDocument, viewBox); PdfFormXObject form = Context.PdfDocument.Internals.CreateIndirectObject<PdfFormXObject>(); #if DEBUG if (DevHelper.RenderComments) form.Elements.SetString("/@comment", "This is the Form XObject of the soft mask"); #endif form.Elements.SetRectangle(PdfFormXObject.Keys.BBox, new PdfRectangle(viewBox)); // Transparency group of mask form //<< // /CS /DeviceGray // /I false // /K false // /S /Transparency // /Type /Group //>> PdfTransparencyGroupAttributes tgAttributes = Context.PdfDocument.Internals.CreateIndirectObject<PdfTransparencyGroupAttributes>(); tgAttributes.Elements.SetName(PdfTransparencyGroupAttributes.Keys.CS, "/DeviceGray"); tgAttributes.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.I, false); tgAttributes.Elements.SetBoolean(PdfTransparencyGroupAttributes.Keys.K, false); // ExtGState of mask form //<< // /AIS false // /BM /Normal // /ca 1 // /CA 1 // /op false // /OP false // /OPM 1 // /SA true // /SMask /None // /Type /ExtGState //>> PdfExtGState pdfStateMaskFrom = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>(); pdfStateMaskFrom.SetDefault1(); // Shading of mask form PdfShading shadingFrom = BuildShadingForSoftMask(brush); ////// Set reference to transparency group attributes ////pdfForm.Elements.SetObject(PdfFormXObject.Keys.Group, tgAttributes); ////pdfForm.Elements[PdfFormXObject.Keys.Matrix] = new PdfLiteral("[1.001 0 0 1.001 0.001 0.001]"); // Soft mask //<< // /G 21 0 R % form // /S /Luminosity // /Type /Mask //>> PdfSoftMask softmask = Context.PdfDocument.Internals.CreateIndirectObject<PdfSoftMask>(); // new PdfSoftMask(this.writer.Owner); //extGState.Elements.SetReference(PdfExtGState.Keys.SMask, softmask); //this.writer.Owner.Internals.AddObject(softmask); #if DEBUG if (DevHelper.RenderComments) softmask.Elements.SetString("/@comment", "This is the soft mask"); #endif softmask.Elements.SetName(PdfSoftMask.Keys.S, "/Luminosity"); softmask.Elements.SetReference(PdfSoftMask.Keys.G, form); // Create content of mask form //<< // /BBox [200.118 369.142 582.795 -141.094] // /Group 16 0 R // /Length 121 // /Matrix [1 0 0 1 0 0] // /Resources // << // /ExtGState // << // /GS0 20 0 R // >> // /Shading // << // /Sh0 19 0 R // >> // >> // /Subtype /Form //>> //stream // q // 200.118 369.142 382.677 -510.236 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 form.Elements.SetReference(PdfFormXObject.Keys.Group, tgAttributes); PdfContentWriter writer = new PdfContentWriter(Context, form); writer.BeginContentRaw(); // Acrobat 8 clips to bounding box, so we should do // why 0 480 360 -480 re ?? //writer.WriteClip(bbox); //writer.WriteGraphicsState(extGState); writer.WriteLiteral("1 i 0 g\n"); writer.WriteLiteral(writer.Resources.AddExtGState(pdfStateMaskFrom) + " 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(shadingFrom) + " sh EX\n"); writer.EndContent(); return softmask; }
/// <summary> /// Builds a monochrome shading for a form XObject of a soft mask. /// </summary> PdfShading BuildShadingForSoftMask(RadialGradientBrush brush) { // Setup shading //<< // /ShadingType 2 // /AntiAlias false // /BBox [0 0 510.236 680.315] // /ColorSpace /DeviceGray // /Coords [5 5 153.492 -86.924] // /Domain [0 1] // /Extend [true true] // /Function 18 0 R //>> PdfShading shading = Context.PdfDocument.Internals.CreateIndirectObject<PdfShading>(); #if DEBUG if (DevHelper.RenderComments) shading.Elements.SetString("/@comment", "This is the shading function of a soft mask"); #endif shading.Elements.SetInteger(PdfShading.Keys.ShadingType, 2); // Axial shading shading.Elements.SetBoolean(PdfShading.Keys.AntiAlias, false); // TODO: BBox full page //shading.Elements.SetValue(PdfShading.Keys.BBox, new PdfLiteral("[0 0 480 640]")); shading.Elements.SetName(PdfShading.Keys.ColorSpace, "/DeviceGray"); ////double x1 = brush.StartPoint.X; ////double y1 = brush.StartPoint.Y; ////double x2 = brush.EndPoint.X; ////double y2 = brush.EndPoint.Y; ////shading.Elements.SetValue(PdfShading.Keys.Coords, new PdfLiteral("[{0:0.####} {1:0.####} {2:0.####} {3:0.####}]", x1, y1, x2, y2)); shading.Elements.SetValue(PdfShading.Keys.Domain, new PdfLiteral("[0 1]")); shading.Elements.SetValue(PdfShading.Keys.Extend, new PdfLiteral("[true true]")); PdfColorMode colorMode = PdfColorMode.Rgb; //this.document.Options.ColorMode; PdfDictionary func; PdfDictionary function = BuildShadingFunction(brush.GradientStops, true, colorMode, true, out func); #if true shading.Elements.SetValue(PdfShading.Keys.Function, function); #else Context.PdfDocument.Internals.AddObject(function); shading.Elements.SetReference(PdfShading.Keys.Function, function); #endif return shading; }
PdfShadingPattern BuildPattern(RadialGradientBrush brush, XRect boundingBox, XMatrix transform) { //<< // /BBox [0 0 600 760] // /Length 123 // /Matrix [0.75 0 0 -0.75 0 480] // /PaintType 1 // /PatternType 1 // /Resources // << // /ColorSpace // << // /CS0 12 0 R // /CS1 12 0 R // >> // /ExtGState // << // /GS0 10 0 R // /GS1 16 0 R // >> // /Shading // << // /Sh0 15 0 R // >> // >> // /TilingType 3 // /Type /Pattern // /XStep 600 // /YStep 1520 //>> //stream // /CS0 cs 1 0 0 scn // 1 i // /GS0 gs // 0 0 600 759.999 re // f // q // 0 0 600 760 re // W n // q // 0 g // /GS1 gs // 1 0 0 0.5 0 0 cm // BX /Sh0 sh EX Q // Q //endstream XRect bbox = new XRect(-600,-700, 1200, 1520); // HACK XMatrix matrix = transform; //matrix.Prepend(brush.Transform.Matrix); double xStep = 600; double yStep = 1520; // HACK PdfShadingPattern pattern = Context.PdfDocument.Internals.CreateIndirectObject<PdfShadingPattern>(); pattern.Elements.SetInteger(PdfTilingPattern.Keys.PatternType, 1); // Tiling pattern.Elements.SetInteger(PdfTilingPattern.Keys.PaintType, 1); // Color pattern.Elements.SetInteger(PdfTilingPattern.Keys.TilingType, 3); // Constant spacing and faster tiling pattern.Elements.SetMatrix(PdfTilingPattern.Keys.Matrix, matrix); pattern.Elements.SetRectangle(PdfTilingPattern.Keys.BBox, new PdfRectangle(bbox)); pattern.Elements.SetReal(PdfTilingPattern.Keys.XStep, xStep); pattern.Elements.SetReal(PdfTilingPattern.Keys.YStep, yStep); double dx = 2 * brush.RadiusX; double dy = 2 * brush.RadiusY; XRect brushBox = new XRect(brush.Center.X - brush.RadiusX, brush.Center.Y - brush.RadiusY, dx, dy); Debug.Assert(dx * dy > 0, "Radius is 0."); double scaleX, scaleY; if (dx > dy) { scaleX = 1; scaleY = dy / dx; } else { scaleX = dx / dy; scaleY = 1; } PdfColorMode colorMode = PdfColorMode.Rgb; PdfDictionary funcReflected; PdfDictionary funcRegular = BuildShadingFunction(brush.GradientStops, false, colorMode, true, out funcReflected); if (brush.SpreadMethod != SpreadMethod.Pad) { if (CanOptimizeForTwoColors(brush.GradientStops)) { PdfDictionary dummy; funcReflected = BuildShadingFunction(brush.GradientStops, false, colorMode, false, out dummy); } else { Context.PdfDocument.Internals.AddObject(funcRegular); } } //PdfShading shading = BuildShading(brush, scaleX, scaleY); int shadingCount = 1; if (brush.SpreadMethod != SpreadMethod.Pad) { // TODO: Calculate number of required shadings shadingCount = Convert.ToInt32(Math.Max(boundingBox.width / (2 * brush.RadiusX), boundingBox.height / (2 * brush.RadiusY)) + 1); // HACK: Rule of thumb, better than nothing shadingCount *= 2; } PdfShading[] shadings = new PdfShading[shadingCount]; // Create the shadings for (int idx = 0; idx < shadingCount; idx++) { PdfShading shading = BuildShading2(brush, scaleX, scaleY, idx, brush.SpreadMethod == SpreadMethod.Reflect && idx % 2 == 1 ? funcReflected : funcRegular); shadings[idx] = shading; } PdfContentWriter writer = new PdfContentWriter(Context, pattern); writer.BeginContentRaw(); // Fill background (even if spread method is not pad) writer.WriteLiteral("q /DeviceRGB cs\n"); //writer.WriteLiteral(PdfEncoders.ToString(clr0, colorMode) + " rg 1 i\n"); writer.WriteLiteral(PdfEncoders.ToString(brush.GradientStops[brush.GradientStops.Count - 1].Color, PdfColorMode.Rgb) + " rg 1 i\n"); writer.WriteLiteral("1 i\n"); PdfExtGState gs = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>(); gs.SetDefault1(); writer.WriteGraphicsState(gs); writer.WriteLiteral("0 0 600 760 re f\n"); XMatrix mat = brush.Transform.Matrix; if (!mat.IsIdentity) writer.WriteMatrix(mat); // Just work: silly loop thru shadings for (int idx = shadingCount - 1; idx >= 0; idx--) { writer.WriteLiteral("q 0 0 600 760 re W n\n"); writer.WriteLiteral("q 0 g\n"); gs = Context.PdfDocument.Internals.CreateIndirectObject<PdfExtGState>(); gs.SetDefault2(); writer.WriteGraphicsState(gs); XMatrix transformation = new XMatrix(scaleX, 0, 0, scaleY, 0, 0); writer.WriteMatrix(transformation); string shName = writer.Resources.AddShading(shadings[idx]); writer.WriteLiteral("BX " + shName + " sh EX Q Q\n"); } writer.WriteLiteral("Q\n"); writer.EndContent(); return pattern; }
/// <summary> /// Builds a shading pattern from an radial gradient brush. /// </summary> public static PdfShadingPattern BuildFromRadialGradientBrush(DocumentRenderingContext context, RadialGradientBrush brush, XRect boundingBox, XMatrix transform) { RadialShadingBuilder builder = new RadialShadingBuilder(context); PdfShadingPattern pattern = builder.BuildPattern(brush, boundingBox, transform); return pattern; }
/// <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; }
PdfShading BuildShading2(RadialGradientBrush brush, double scaleX, double scaleY, int repeatcount, PdfObject function) { // Setup shading //<< // /AntiAlias false // /ColorSpace 12 0 R // /Coords [120 120 120 120 120 0] // /Domain [0 1] // /Extend [false false] // /Function 14 0 R // /ShadingType 3 //>> PdfShading shading = Context.PdfDocument.Internals.CreateIndirectObject<PdfShading>(); shading.Elements.SetInteger(PdfShading.Keys.ShadingType, 3); // Radial shading PdfColorMode colorMode = PdfColorMode.Rgb; //this.document.Options.ColorMode; if (colorMode != PdfColorMode.Cmyk) shading.Elements[PdfShading.Keys.ColorSpace] = new PdfName("/DeviceRGB"); else shading.Elements[PdfShading.Keys.ColorSpace] = new PdfName("/DeviceCMYK"); #if DEBUG_ if (DevHelper.RenderComments) function.Elements.SetString("/@comment", "This is the shading function of a RadialGradientBrushPattern"); #endif shading.Elements[PdfShading.Keys.Function] = function; shading.Elements[PdfShading.Keys.AntiAlias] = new PdfLiteral("false"); // redundant shading.Elements[PdfShading.Keys.Extend] = new PdfLiteral("[false false]"); double r = Math.Max(brush.RadiusX, brush.RadiusY); double x0 = brush.Center.X / scaleX; double y0 = brush.Center.Y / scaleY; double r0 = r * (repeatcount + 1); double x1 = brush.GradientOrigin.X / scaleX; double y1 = brush.GradientOrigin.Y / scaleY; double r1 = r * repeatcount; shading.Elements[PdfShading.Keys.Coords] = new PdfLiteral("[{0:0.###} {1:0.###} {2:0.###} {3:0.###} {4:0.###} {5:0.###}]", x0, y0, r0, x1, y1, r1); return shading; }
/// <summary> /// Parses a RadialGradientBrush element. /// </summary> RadialGradientBrush ParseRadialGradientBrush() { Debug.Assert(this.reader.Name == "RadialGradientBrush"); bool isEmptyElement = this.reader.IsEmptyElement; RadialGradientBrush brush = new RadialGradientBrush(); while (MoveToNextAttribute()) { switch (this.reader.Name) { case "Opacity": brush.Opacity = ParseDouble(this.reader.Value); break; case "Transform": brush.Transform = ParseMatrixTransform(this.reader.Value); break; case "ColorInterpolationMode": brush.ColorInterpolationMode= ParseEnum<ClrIntMode>(this.reader.Value); break; case "SpreadMethod": brush.SpreadMethod = ParseEnum<SpreadMethod>(this.reader.Value); break; case "MappingMode ": brush.MappingMode = ParseEnum<MappingMode>(this.reader.Value); break; case "Center": brush.Center = Point.Parse(this.reader.Value); break; case "GradientOrigin": brush.GradientOrigin = Point.Parse(this.reader.Value); break; case "RadiusX": brush.RadiusX =ParseDouble(this.reader.Value); break; case "RadiusY": brush.RadiusY = ParseDouble(this.reader.Value); break; case "x:Key": brush.Key = this.reader.Value; break; } } if (!isEmptyElement) { MoveToNextElement(); while (this.reader.IsStartElement()) { switch (this.reader.Name) { case "RadialGradientBrush.Transform": MoveToNextElement(); brush.Transform = ParseMatrixTransform(); MoveToNextElement(); break; case "RadialGradientBrush.GradientStops": // do not MoveToNextElement(); brush.GradientStops = ParseGradientStops(); break; default: Debugger.Break(); break; } } } MoveToNextElement(); return brush; }