private static void DrawImageMasks(PdfPage page, Stream imageStream, Stream softMaskStream, Stream stencilMaskStream, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
page.Graphics.DrawString("Images Masks", titleFont, brush, 20, 50);
page.Graphics.DrawString("Soft mask:", sectionFont, brush, 20, 70);
PdfPngImage softMaskImage = new PdfPngImage(softMaskStream);
PdfSoftMask softMask = new PdfSoftMask(softMaskImage);
imageStream.Position = 0;
PdfJpegImage softMaskJpeg = new PdfJpegImage(imageStream);
softMaskJpeg.Mask = softMask;
// Draw the image with a soft mask.
page.Graphics.DrawImage(softMaskJpeg, 20, 90, 280, 0);
page.Graphics.DrawString("Stencil mask:", sectionFont, brush, 320, 70);
PdfPngImage stencilMaskImage = new PdfPngImage(stencilMaskStream);
PdfStencilMask stencilMask = new PdfStencilMask(stencilMaskImage);
imageStream.Position = 0;
PdfJpegImage stencilMaskJpeg = new PdfJpegImage(imageStream);
stencilMaskJpeg.Mask = stencilMask;
// Draw the image with a stencil mask.
page.Graphics.DrawImage(stencilMaskJpeg, 320, 90, 280, 0);
page.Graphics.DrawString("Stencil mask painting:", sectionFont, brush, 20, 320);
PdfBrush redBrush = new PdfBrush(PdfRgbColor.DarkRed);
page.Graphics.DrawStencilMask(stencilMask, redBrush, 20, 340, 280, 0);
PdfBrush blueBrush = new PdfBrush(PdfRgbColor.DarkBlue);
page.Graphics.DrawStencilMask(stencilMask, blueBrush, 320, 340, 280, 0);
PdfBrush greenBrush = new PdfBrush(PdfRgbColor.DarkGreen);
page.Graphics.DrawStencilMask(stencilMask, greenBrush, 20, 550, 280, 0);
PdfBrush yellowBrush = new PdfBrush(PdfRgbColor.YellowGreen);
page.Graphics.DrawStencilMask(stencilMask, yellowBrush, 320, 550, 280, 0);
page.Graphics.CompressAndClose();
}
/// <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 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);
}
void RealizeLinearGradientBrush(LinearGradientBrush brush, XForm xform)
{
XMatrix matrix = currentTransform;
PdfShadingPattern pattern = new PdfShadingPattern(writer.Owner);
pattern.Elements[PdfShadingPattern.Keys.PatternType] = new PdfInteger(2); // shading pattern
// Setup shading
PdfShading shading = new PdfShading(writer.Owner);
PdfColorMode colorMode = PdfColorMode.Rgb; //this.document.Options.ColorMode;
PdfDictionary function = BuildShadingFunction(brush.GradientStops, colorMode);
function.Elements.SetString("/@", "This is the shading function of a LinearGradientBrush");
shading.Elements[PdfShading.Keys.Function] = function;
shading.Elements[PdfShading.Keys.ShadingType] = new PdfInteger(2); // Axial shading
//if (colorMode != PdfColorMode.Cmyk)
shading.Elements[PdfShading.Keys.ColorSpace] = new PdfName("/DeviceRGB");
//else
//shading.Elements[Keys.ColorSpace] = new PdfName("/DeviceCMYK");
//double x1 = 0, y1 = 0, x2 = 0, y2 = 0;
double x1 = brush.StartPoint.X;
double y1 = brush.StartPoint.Y;
double x2 = brush.EndPoint.X;
double y2 = brush.EndPoint.Y;
shading.Elements[PdfShading.Keys.Coords] = new PdfLiteral("[{0:0.###} {1:0.###} {2:0.###} {3:0.###}]", x1, y1, x2, y2);
// old: Elements[Keys.Background] = new PdfRawItem("[0 1 1]");
// old: Elements[Keys.Domain] =
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 = writer.Resources.AddPattern(pattern);
writer.WriteLiteral("/Pattern cs\n", name);
writer.WriteLiteral("{0} scn\n", name);
double alpha = brush.Opacity * brush.GradientStops.GetAverageAlpha();
if (alpha < 1 && writer.renderMode == RenderMode.Default)
{
#if true
PdfExtGState extGState = writer.Owner.ExtGStateTable.GetExtGStateNonStroke(alpha);
string gs = writer.Resources.AddExtGState(extGState);
writer.WriteLiteral("{0} gs\n", gs);
#else
#if true
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);
}
#else
XForm form = new XForm(this.writer.Owner, 220, 140);
XGraphics formGfx = XGraphics.FromForm(form);
// draw something
//XSolidBrush xbrush = new XSolidBrush(XColor.FromArgb(128, 128, 128));
XLinearGradientBrush xbrush = new XLinearGradientBrush(new XPoint(0, 0), new XPoint(220, 0), XColors.White, XColors.Black);
formGfx.DrawRectangle(xbrush, -10000, -10000, 20000, 20000);
//formGfx.DrawString("Text, Graphics, Images, and Forms", new XFont("Verdana", 10, XFontStyle.Regular), XBrushes.Navy, 3, 0, XStringFormat.TopLeft);
formGfx.Dispose();
// Close form
form.Finish();
PdfFormXObject pdfForm = this.writer.Owner.FormTable.GetForm(form);
string formName = this.writer.Resources.AddForm(pdfForm);
//double x = 20, y = 20;
//double cx = 1;
//double cy = 1;
//this.writer.AppendFormat("q {2:0.###} 0 0 -{3:0.###} {0:0.###} {4:0.###} cm 100 Tz {5} Do Q\n",
// x, y, cx, cy, y + 0, formName);
//this.writer.AppendFormat("q {2:0.###} 0 0 -{3:0.###} {0:0.###} {4:0.###} cm 100 Tz {5} Do Q\n",
// x, y, cx, cy, y + 220/1.5, formName);
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.SetReference(PdfFormXObject.Keys.Group, tgAttributes);
PdfSoftMask softmask = new PdfSoftMask(this.writer.Owner);
this.writer.Owner.Internals.AddObject(softmask);
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
#endif
}
}
void RealizeRadialGradientBrush(RadialGradientBrush brush, XForm xform)
{
XMatrix matrix = new XMatrix(); // this.renderer.defaultViewMatrix;
//matrix.MultiplyPrepend(this.Transform);
matrix = currentTransform;
//matrix.MultiplyPrepend(XMatrix.CreateScaling(1.3, 1));
PdfShadingPattern pattern = new PdfShadingPattern(writer.Owner);
pattern.Elements[PdfShadingPattern.Keys.PatternType] = new PdfInteger(2); // shading pattern
// Setup shading
PdfShading shading = new PdfShading(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 = writer.Resources.AddPattern(pattern);
writer.WriteLiteral("/Pattern cs\n", name);
writer.WriteLiteral("{0} scn\n", name);
double alpha = brush.Opacity * brush.GradientStops.GetAverageAlpha();
if (alpha < 1)
{
#if true
PdfExtGState extGState = writer.Owner.ExtGStateTable.GetExtGStateNonStroke(alpha);
string gs = writer.Resources.AddExtGState(extGState);
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
}
}
