/// <summary>
/// Extracts text fragments from the 2nd page and highlights the glyphs in the fragment.
/// </summary>
/// <param name="document"></param>
private static void ExtractTextAndHighlightGlyphs(PdfFixedDocument document)
{
PdfRgbColor penColor = new PdfRgbColor();
PdfPen pen = new PdfPen(penColor, 0.5);
Random rnd = new Random();
byte[] rgb = new byte[3];
PdfContentExtractor ce = new PdfContentExtractor(document.Pages[1]);
PdfTextFragmentCollection tfc = ce.ExtractTextFragments();
PdfTextFragment tf = tfc[1];
for (int i = 0; i < tf.Glyphs.Count; i++)
{
rnd.NextBytes(rgb);
penColor.R = rgb[0];
penColor.G = rgb[1];
penColor.B = rgb[2];
PdfPath boundingPath = new PdfPath();
boundingPath.StartSubpath(tf.Glyphs[i].GlyphCorners[0].X, tf.Glyphs[i].GlyphCorners[0].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[1].X, tf.Glyphs[i].GlyphCorners[1].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[2].X, tf.Glyphs[i].GlyphCorners[2].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[3].X, tf.Glyphs[i].GlyphCorners[3].Y);
boundingPath.CloseSubpath();
document.Pages[1].Graphics.DrawPath(pen, boundingPath);
}
}
private static void fill(PdfTilingPattern pattern)
{
PdfCanvas canvas = pattern.Canvas;
PdfColor red = new PdfRgbColor(255, 0, 0);
canvas.Brush.Color = red;
canvas.Pen.Color = red;
canvas.AppendCircle(new PointF(2, 2), 2);
canvas.FillAndStrokePath(PdfFillMode.Winding);
}
private static void DrawBezierCurves(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfBrush blueBrush = new PdfBrush(PdfRgbColor.DarkBlue);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
page.Graphics.DrawString("Bezier curves", titleFont, brush, 20, 50);
page.Graphics.DrawLine(blackPen, 20, 210, 600, 210);
page.Graphics.DrawLine(blackPen, 306, 70, 306, 350);
page.Graphics.DrawRectangle(blueBrush, 39, 339, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 279, 79, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 499, 299, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 589, 69, 2, 2);
page.Graphics.DrawBezier(redPen, 40, 340, 280, 80, 500, 300, 590, 70);
page.Graphics.DrawString("Random bezier curves clipped to view", sectionFont, brush, 20, 385);
PdfPath rectPath = new PdfPath();
rectPath.AddRectangle(20, 400, 570, 300);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(rectPath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
double x1 = rnd.NextDouble() * page.Width;
double y1 = 380 + rnd.NextDouble() * 350;
double x2 = rnd.NextDouble() * page.Width;
double y2 = 380 + rnd.NextDouble() * 350;
double x3 = rnd.NextDouble() * page.Width;
double y3 = 380 + rnd.NextDouble() * 350;
double x4 = rnd.NextDouble() * page.Width;
double y4 = 380 + rnd.NextDouble() * 350;
page.Graphics.DrawBezier(randomPen, x1, y1, x2, y2, x3, y3, x4, y4);
}
page.Graphics.RestoreGraphicsState();
blackPen.DashPattern = null;
page.Graphics.DrawPath(blackPen, rectPath);
page.Graphics.CompressAndClose();
}
private static void DrawFormXObjects(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Form XObjects", titleFont, brush, 20, 50);
page.Graphics.DrawString("Scaling", sectionFont, brush, 20, 70);
// Create the XObject content - random rectangles
PdfFormXObject xobject = new PdfFormXObject(300, 300);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
double left = rnd.NextDouble() * xobject.Width;
double top = rnd.NextDouble() * xobject.Height;
double width = rnd.NextDouble() * xobject.Width;
double height = rnd.NextDouble() * xobject.Height;
double orientation = rnd.Next(360);
xobject.Graphics.DrawRectangle(randomPen, randomBrush, left, top, width, height, orientation);
}
xobject.Graphics.DrawRectangle(blackPen, 0, 0, xobject.Width, xobject.Height);
xobject.Graphics.CompressAndClose();
// Draw the form XObject 3 times on the page at different sizes.
page.Graphics.DrawFormXObject(xobject, 3, 90, 100, 100);
page.Graphics.DrawFormXObject(xobject, 106, 90, 200, 200);
page.Graphics.DrawFormXObject(xobject, 309, 90, 300, 300);
page.Graphics.DrawString("Flipping", sectionFont, brush, 20, 420);
page.Graphics.DrawFormXObject(xobject, 20, 440, 150, 150);
page.Graphics.DrawFormXObject(xobject, 200, 440, 150, 150, 0, PdfFlipDirection.VerticalFlip);
page.Graphics.DrawFormXObject(xobject, 20, 620, 150, 150, 0, PdfFlipDirection.HorizontalFlip);
page.Graphics.DrawFormXObject(xobject, 200, 620, 150, 150, 0, PdfFlipDirection.VerticalFlip | PdfFlipDirection.HorizontalFlip);
page.Graphics.CompressAndClose();
}
/// <summary>
/// Main method for running the sample.
/// </summary>
public static SampleOutputInfo[] Run(Stream output)
{
PdfFixedDocument document = new PdfFixedDocument();
// Init the save operation
document.BeginSave(output);
PdfRgbColor color = new PdfRgbColor();
PdfBrush brush = new PdfBrush(color);
Random rnd = new Random();
for (int i = 0; i < 3; i++)
{
PdfPage page = document.Pages.Add();
page.Width = 1000;
page.Height = 1000;
for (int y = 1; y <= page.Height; y++)
{
for (int x = 0; x < page.Width; x++)
{
color.R = (byte)rnd.Next(256);
color.G = (byte)rnd.Next(256);
color.B = (byte)rnd.Next(256);
page.Graphics.DrawRectangle(brush, x, y - 1, 1, 1);
}
if ((y % 100) == 0)
{
// Compress the graphics that have been drawn so far and save them.
page.Graphics.Compress();
page.SaveGraphics();
}
}
// Close the page graphics and save the page.
page.Graphics.CompressAndClose();
page.Save();
}
// Finish the document.
document.EndSave();
return null;
}
private static Color toGdiColor(PdfColor pdfColor, int opacityPercent)
{
if (pdfColor == null)
{
return(Color.Empty);
}
PdfRgbColor rgbColor = pdfColor.ToRgb();
int alpha = 255;
if (opacityPercent < 100 && opacityPercent >= 0)
{
alpha = (int)(255.0 * opacityPercent / 100.0);
}
return(Color.FromArgb(alpha, rgbColor.R, rgbColor.G, rgbColor.B));
}
public static void Main()
{
// NOTE:
// When used in trial mode, the library imposes some restrictions.
// Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx
// for more information.
string pathToFile = "TextMarkupAnnotations.pdf";
using (PdfDocument pdf = new PdfDocument())
{
PdfPage page = pdf.Pages[0];
PdfCanvas canvas = page.Canvas;
// Draw text on the page
const string Text = "Highlighted text";
PdfPoint textPosition = new PdfPoint(10, 50);
canvas.FontSize = 30;
canvas.DrawString(textPosition, Text);
// Get size of the drawn text
PdfSize size = canvas.MeasureText(Text);
var bounds = new PdfRectangle(textPosition, size);
// Highlight and annotate the text
var color = new PdfRgbColor(0, 0, 255);
const string AnnotationContents = "Lorem ipsum";
page.AddHighlightAnnotation(AnnotationContents, bounds, color);
// Or call these method to strike out or underline the text:
// page.AddStrikeoutAnnotation(AnnotationContents, bounds, color);
// page.AddJaggedUnderlineAnnotation(AnnotationContents, bounds, color);
// page.AddUnderlineAnnotation(AnnotationContents, bounds, color);
pdf.Save(pathToFile);
}
Process.Start(pathToFile);
}
public static void Main()
{
// NOTE:
// When used in trial mode, the library imposes some restrictions.
// Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx
// for more information.
string pathToFile = "FindAndHighlightText.pdf";
using (var pdf = new PdfDocument(@"..\Sample Data\jfif3.pdf"))
{
const string TextToFind = "JPEG File Interchange Format";
const StringComparison Comparison = StringComparison.InvariantCultureIgnoreCase;
var highlightColor = new PdfRgbColor(255, 255, 0);
highlightPhrases(pdf, TextToFind, Comparison, highlightColor);
pdf.Save(pathToFile);
}
Console.WriteLine($"The output is located in {Environment.CurrentDirectory}");
}
private static void DrawShadings(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Shadings", titleFont, brush, 20, 50);
page.Graphics.DrawString("Horizontal", sectionFont, brush, 25, 70);
PdfAxialShading horizontalShading = new PdfAxialShading();
horizontalShading.StartColor = new PdfRgbColor(255, 0, 0);
horizontalShading.EndColor = new PdfRgbColor(0, 0, 255);
horizontalShading.StartPoint = new PdfPoint(25, 90);
horizontalShading.EndPoint = new PdfPoint(175, 90);
// Clip the shading to desired area.
PdfPath hsArea = new PdfPath();
hsArea.AddRectangle(25, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(hsArea);
page.Graphics.DrawShading(horizontalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Vertical", sectionFont, brush, 225, 70);
PdfAxialShading verticalShading = new PdfAxialShading();
verticalShading.StartColor = new PdfRgbColor(255, 0, 0);
verticalShading.EndColor = new PdfRgbColor(0, 0, 255);
verticalShading.StartPoint = new PdfPoint(225, 90);
verticalShading.EndPoint = new PdfPoint(225, 240);
// Clip the shading to desired area.
PdfPath vsArea = new PdfPath();
vsArea.AddRectangle(225, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(vsArea);
page.Graphics.DrawShading(verticalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Diagonal", sectionFont, brush, 425, 70);
PdfAxialShading diagonalShading = new PdfAxialShading();
diagonalShading.StartColor = new PdfRgbColor(255, 0, 0);
diagonalShading.EndColor = new PdfRgbColor(0, 0, 255);
diagonalShading.StartPoint = new PdfPoint(425, 90);
diagonalShading.EndPoint = new PdfPoint(575, 240);
// Clip the shading to desired area.
PdfPath dsArea = new PdfPath();
dsArea.AddRectangle(425, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(dsArea);
page.Graphics.DrawShading(diagonalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Extended shading", sectionFont, brush, 25, 260);
PdfAxialShading extendedShading = new PdfAxialShading();
extendedShading.StartColor = new PdfRgbColor(255, 0, 0);
extendedShading.EndColor = new PdfRgbColor(0, 0, 255);
extendedShading.StartPoint = new PdfPoint(225, 280);
extendedShading.EndPoint = new PdfPoint(375, 280);
extendedShading.ExtendStart = true;
extendedShading.ExtendEnd = true;
// Clip the shading to desired area.
PdfPath esArea = new PdfPath();
esArea.AddRectangle(25, 280, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(esArea);
page.Graphics.DrawShading(extendedShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, esArea);
page.Graphics.DrawString("Limited shading", sectionFont, brush, 25, 330);
PdfAxialShading limitedShading = new PdfAxialShading();
limitedShading.StartColor = new PdfRgbColor(255, 0, 0);
limitedShading.EndColor = new PdfRgbColor(0, 0, 255);
limitedShading.StartPoint = new PdfPoint(225, 350);
limitedShading.EndPoint = new PdfPoint(375, 350);
limitedShading.ExtendStart = false;
limitedShading.ExtendEnd = false;
// Clip the shading to desired area.
PdfPath lsArea = new PdfPath();
lsArea.AddRectangle(25, 350, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(lsArea);
page.Graphics.DrawShading(limitedShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, lsArea);
page.Graphics.DrawString("Multi-stop shading", sectionFont, brush, 25, 400);
// Multi-stop shadings use a stitching function to combine the functions that define each gradient part.
// Function for red to blue shading.
PdfExponentialFunction redToBlueFunc = new PdfExponentialFunction();
// Linear function
redToBlueFunc.Exponent = 1;
redToBlueFunc.Domain = new double[] { 0, 1 };
// Red color for start
redToBlueFunc.C0 = new double[] { 1, 0, 0 };
// Blue color for start
redToBlueFunc.C1 = new double[] { 0, 0, 1 };
// Function for blue to green shading.
PdfExponentialFunction blueToGreenFunc = new PdfExponentialFunction();
// Linear function
blueToGreenFunc.Exponent = 1;
blueToGreenFunc.Domain = new double[] { 0, 1 };
// Blue color for start
blueToGreenFunc.C0 = new double[] { 0, 0, 1 };
// Green color for start
blueToGreenFunc.C1 = new double[] { 0, 1, 0 };
//Stitching function for the shading.
PdfStitchingFunction shadingFunction = new PdfStitchingFunction();
shadingFunction.Functions.Add(redToBlueFunc);
shadingFunction.Functions.Add(blueToGreenFunc);
shadingFunction.Domain = new double[] { 0, 1 };
shadingFunction.Encode = new double[] { 0, 1, 0, 1 };
// Entire shading goes from 0 to 1 (100%).
// We set the first shading (red->blue) to cover 30% (0 - 0.3) and
// the second shading to cover 70% (0.3 - 1).
shadingFunction.Bounds = new double[] { 0.3 };
// The multistop shading
PdfAxialShading multiStopShading = new PdfAxialShading();
multiStopShading.StartPoint = new PdfPoint(25, 420);
multiStopShading.EndPoint = new PdfPoint(575, 420);
// The colorspace must match the colors specified in C0 & C1
multiStopShading.ColorSpace = new PdfRgbColorSpace();
multiStopShading.Function = shadingFunction;
// Clip the shading to desired area.
PdfPath mssArea = new PdfPath();
mssArea.AddRectangle(25, 420, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(mssArea);
page.Graphics.DrawShading(multiStopShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, lsArea);
page.Graphics.DrawString("Radial shading", sectionFont, brush, 25, 470);
PdfRadialShading rs1 = new PdfRadialShading();
rs1.StartColor = new PdfRgbColor(0, 255, 0);
rs1.EndColor = new PdfRgbColor(255, 0, 255);
rs1.StartCircleCenter = new PdfPoint(50, 500);
rs1.StartCircleRadius = 10;
rs1.EndCircleCenter = new PdfPoint(500, 570);
rs1.EndCircleRadius = 100;
page.Graphics.DrawShading(rs1);
PdfRadialShading rs2 = new PdfRadialShading();
rs2.StartColor = new PdfRgbColor(0, 255, 0);
rs2.EndColor = new PdfRgbColor(255, 0, 255);
rs2.StartCircleCenter = new PdfPoint(80, 600);
rs2.StartCircleRadius = 10;
rs2.EndCircleCenter = new PdfPoint(110, 690);
rs2.EndCircleRadius = 100;
page.Graphics.DrawShading(rs2);
page.Graphics.CompressAndClose();
}
private static void DrawLines(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen bluePen = new PdfPen(PdfRgbColor.LightBlue, 16);
page.Graphics.DrawString("Lines", titleFont, brush, 20, 50);
page.Graphics.DrawString("Line styles:", sectionFont, brush, 20, 70);
page.Graphics.DrawString("Solid", sectionFont, brush, 20, 90);
page.Graphics.DrawLine(blackPen, 100, 95, 400, 95);
page.Graphics.DrawString("Dashed", sectionFont, brush, 20, 110);
blackPen.DashPattern = new double[] { 3, 3 };
page.Graphics.DrawLine(blackPen, 100, 115, 400, 115);
page.Graphics.DrawString("Line cap styles:", sectionFont, brush, 20, 150);
page.Graphics.DrawString("Flat", sectionFont, brush, 20, 175);
page.Graphics.DrawLine(bluePen, 100, 180, 400, 180);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 180, 400, 180);
page.Graphics.DrawString("Square", sectionFont, brush, 20, 195);
bluePen.LineCap = PdfLineCap.Square;
page.Graphics.DrawLine(bluePen, 100, 200, 400, 200);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 200, 400, 200);
page.Graphics.DrawString("Round", sectionFont, brush, 20, 215);
bluePen.LineCap = PdfLineCap.Round;
page.Graphics.DrawLine(bluePen, 100, 220, 400, 220);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 220, 400, 220);
page.Graphics.DrawString("Line join styles:", sectionFont, brush, 20, 250);
page.Graphics.DrawString("Miter", sectionFont, brush, 20, 280);
PdfPath miterPath = new PdfPath();
miterPath.StartSubpath(150, 320);
miterPath.AddLineTo(250, 260);
miterPath.AddLineTo(350, 320);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Miter;
page.Graphics.DrawPath(bluePen, miterPath);
page.Graphics.DrawString("Bevel", sectionFont, brush, 20, 360);
PdfPath bevelPath = new PdfPath();
bevelPath.StartSubpath(150, 400);
bevelPath.AddLineTo(250, 340);
bevelPath.AddLineTo(350, 400);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Bevel;
page.Graphics.DrawPath(bluePen, bevelPath);
page.Graphics.DrawString("Round", sectionFont, brush, 20, 440);
PdfPath roundPath = new PdfPath();
roundPath.StartSubpath(150, 480);
roundPath.AddLineTo(250, 420);
roundPath.AddLineTo(350, 480);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Round;
page.Graphics.DrawPath(bluePen, roundPath);
page.Graphics.DrawString("Random lines clipped to rectangle", sectionFont, brush, 20, 520);
PdfPath clipPath = new PdfPath();
clipPath.AddRectangle(20, 550, 570, 230);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(clipPath);
PdfRgbColor randomColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomColor, 1);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomColor.R = (byte)rnd.Next(256);
randomColor.G = (byte)rnd.Next(256);
randomColor.B = (byte)rnd.Next(256);
page.Graphics.DrawLine(randomPen, rnd.NextDouble() * page.Width, 550 + rnd.NextDouble() * 250, rnd.NextDouble() * page.Width, 550 + rnd.NextDouble() * 250);
}
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, clipPath);
page.Graphics.CompressAndClose();
}
private static void DrawArcsAndPies(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Arcs", titleFont, brush, 20, 50);
page.Graphics.DrawString("Pies", titleFont, brush, 310, 50);
page.Graphics.DrawLine(blackPen, 20, 210, 300, 210);
page.Graphics.DrawLine(blackPen, 160, 70, 160, 350);
page.Graphics.DrawLine(blackPen, 310, 210, 590, 210);
page.Graphics.DrawLine(blackPen, 450, 70, 450, 350);
blackPen.DashPattern = new double[] { 2, 2 };
page.Graphics.DrawLine(blackPen, 20, 70, 300, 350);
page.Graphics.DrawLine(blackPen, 20, 350, 300, 70);
page.Graphics.DrawLine(blackPen, 310, 70, 590, 350);
page.Graphics.DrawLine(blackPen, 310, 350, 590, 70);
page.Graphics.DrawArc(redPen, 30, 80, 260, 260, 0, 135);
page.Graphics.DrawPie(redPen, 320, 80, 260, 260, 45, 270);
page.Graphics.DrawString("Random arcs and pies clipped to view", sectionFont, brush, 20, 385);
PdfPath rectPath = new PdfPath();
rectPath.AddRectangle(20, 400, 570, 300);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(rectPath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
int mode = rnd.Next(4);
double left = rnd.NextDouble() * page.Width;
double top = 380 + rnd.NextDouble() * 350;
double width = rnd.NextDouble() * page.Width;
double height = rnd.NextDouble() * 250;
double startAngle = rnd.Next(360);
double sweepAngle = rnd.Next(360);
switch (mode)
{
case 0:
// Stroke arc outline
page.Graphics.DrawArc(randomPen, left, top, width, height, startAngle, sweepAngle);
break;
case 1:
// Stroke pie outline
page.Graphics.DrawPie(randomPen, left, top, width, height, startAngle, sweepAngle);
break;
case 2:
// Fill pie interior
page.Graphics.DrawPie(randomBrush, left, top, width, height, startAngle, sweepAngle);
break;
case 3:
// Stroke and fill pie
page.Graphics.DrawPie(randomPen, randomBrush, left, top, width, height, startAngle, sweepAngle);
break;
}
}
page.Graphics.RestoreGraphicsState();
blackPen.DashPattern = null;
page.Graphics.DrawPath(blackPen, rectPath);
page.Graphics.CompressAndClose();
}
private static void DrawArcsAndPies(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Arcs", titleFont, brush, 20, 50);
page.Graphics.DrawString("Pies", titleFont, brush, 310, 50);
page.Graphics.DrawLine(blackPen, 20, 210, 300, 210);
page.Graphics.DrawLine(blackPen, 160, 70, 160, 350);
page.Graphics.DrawLine(blackPen, 310, 210, 590, 210);
page.Graphics.DrawLine(blackPen, 450, 70, 450, 350);
blackPen.DashPattern = new double[] { 2, 2 };
page.Graphics.DrawLine(blackPen, 20, 70, 300, 350);
page.Graphics.DrawLine(blackPen, 20, 350, 300, 70);
page.Graphics.DrawLine(blackPen, 310, 70, 590, 350);
page.Graphics.DrawLine(blackPen, 310, 350, 590, 70);
page.Graphics.DrawArc(redPen, 30, 80, 260, 260, 0, 135);
page.Graphics.DrawPie(redPen, 320, 80, 260, 260, 45, 270);
page.Graphics.DrawString("Random arcs and pies clipped to view", sectionFont, brush, 20, 385);
PdfPath rectPath = new PdfPath();
rectPath.AddRectangle(20, 400, 570, 300);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(rectPath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
int mode = rnd.Next(4);
double left = rnd.NextDouble() * page.Width;
double top = 380 + rnd.NextDouble() * 350;
double width = rnd.NextDouble() * page.Width;
double height = rnd.NextDouble() * 250;
double startAngle = rnd.Next(360);
double sweepAngle = rnd.Next(360);
switch (mode)
{
case 0:
// Stroke arc outline
page.Graphics.DrawArc(randomPen, left, top, width, height, startAngle, sweepAngle);
break;
case 1:
// Stroke pie outline
page.Graphics.DrawPie(randomPen, left, top, width, height, startAngle, sweepAngle);
break;
case 2:
// Fill pie interior
page.Graphics.DrawPie(randomBrush, left, top, width, height, startAngle, sweepAngle);
break;
case 3:
// Stroke and fill pie
page.Graphics.DrawPie(randomPen, randomBrush, left, top, width, height, startAngle, sweepAngle);
break;
}
}
page.Graphics.RestoreGraphicsState();
blackPen.DashPattern = null;
page.Graphics.DrawPath(blackPen, rectPath);
page.Graphics.CompressAndClose();
}
private static void DrawEllipses(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Ellipses", titleFont, brush, 20, 50);
page.Graphics.DrawLine(blackPen, 20, 150, 300, 150);
page.Graphics.DrawLine(blackPen, 80, 70, 80, 350);
page.Graphics.DrawEllipse(redPen, 80, 150, 180, 100);
page.Graphics.DrawLine(blackPen, 320, 150, 600, 150);
page.Graphics.DrawLine(blackPen, 380, 70, 380, 350);
page.Graphics.DrawEllipse(redPen, 380, 150, 180, 100, 30);
page.Graphics.DrawString("Random ellipses clipped to view", sectionFont, brush, 20, 385);
PdfPath ellipsePath = new PdfPath();
ellipsePath.AddEllipse(20, 400, 570, 300);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(ellipsePath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
int mode = rnd.Next(3);
double left = rnd.NextDouble() * page.Width;
double top = 380 + rnd.NextDouble() * 350;
double width = rnd.NextDouble() * page.Width;
double height = rnd.NextDouble() * 250;
double orientation = rnd.Next(360);
switch (mode)
{
case 0:
// Stroke ellipse outline
page.Graphics.DrawEllipse(randomPen, left, top, width, height, orientation);
break;
case 1:
// Fill ellipse interior
page.Graphics.DrawEllipse(randomBrush, left, top, width, height, orientation);
break;
case 2:
// Stroke and fill ellipse
page.Graphics.DrawEllipse(randomPen, randomBrush, left, top, width, height, orientation);
break;
}
}
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, ellipsePath);
page.Graphics.CompressAndClose();
}
private static void DrawBezierCurves(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfBrush blueBrush = new PdfBrush(PdfRgbColor.DarkBlue);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
page.Graphics.DrawString("Bezier curves", titleFont, brush, 20, 50);
page.Graphics.DrawLine(blackPen, 20, 210, 600, 210);
page.Graphics.DrawLine(blackPen, 306, 70, 306, 350);
page.Graphics.DrawRectangle(blueBrush, 39, 339, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 279, 79, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 499, 299, 2, 2);
page.Graphics.DrawRectangle(blueBrush, 589, 69, 2, 2);
page.Graphics.DrawBezier(redPen, 40, 340, 280, 80, 500, 300, 590, 70);
page.Graphics.DrawString("Random bezier curves clipped to view", sectionFont, brush, 20, 385);
PdfPath rectPath = new PdfPath();
rectPath.AddRectangle(20, 400, 570, 300);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(rectPath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
double x1 = rnd.NextDouble() * page.Width;
double y1 = 380 + rnd.NextDouble() * 350;
double x2 = rnd.NextDouble() * page.Width;
double y2 = 380 + rnd.NextDouble() * 350;
double x3 = rnd.NextDouble() * page.Width;
double y3 = 380 + rnd.NextDouble() * 350;
double x4 = rnd.NextDouble() * page.Width;
double y4 = 380 + rnd.NextDouble() * 350;
page.Graphics.DrawBezier(randomPen, x1, y1, x2, y2, x3, y3, x4, y4);
}
page.Graphics.RestoreGraphicsState();
blackPen.DashPattern = null;
page.Graphics.DrawPath(blackPen, rectPath);
page.Graphics.CompressAndClose();
}
private static void DrawFormXObjects(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Form XObjects", titleFont, brush, 20, 50);
page.Graphics.DrawString("Scaling", sectionFont, brush, 20, 70);
// Create the XObject content - random rectangles
PdfFormXObject xobject = new PdfFormXObject(300, 300);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
double left = rnd.NextDouble() * xobject.Width;
double top = rnd.NextDouble() * xobject.Height;
double width = rnd.NextDouble() * xobject.Width;
double height = rnd.NextDouble() * xobject.Height;
double orientation = rnd.Next(360);
xobject.Graphics.DrawRectangle(randomPen, randomBrush, left, top, width, height, orientation);
}
xobject.Graphics.DrawRectangle(blackPen, 0, 0, xobject.Width, xobject.Height);
xobject.Graphics.CompressAndClose();
// Draw the form XObject 3 times on the page at different sizes.
page.Graphics.DrawFormXObject(xobject, 3, 90, 100, 100);
page.Graphics.DrawFormXObject(xobject, 106, 90, 200, 200);
page.Graphics.DrawFormXObject(xobject, 309, 90, 300, 300);
page.Graphics.DrawString("Flipping", sectionFont, brush, 20, 420);
page.Graphics.DrawFormXObject(xobject, 20, 440, 150, 150);
page.Graphics.DrawFormXObject(xobject, 200, 440, 150, 150, 0, PdfFlipDirection.VerticalFlip);
page.Graphics.DrawFormXObject(xobject, 20, 620, 150, 150, 0, PdfFlipDirection.HorizontalFlip);
page.Graphics.DrawFormXObject(xobject, 200, 620, 150, 150, 0, PdfFlipDirection.VerticalFlip | PdfFlipDirection.HorizontalFlip);
page.Graphics.CompressAndClose();
}
private static void DrawLines(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen bluePen = new PdfPen(PdfRgbColor.LightBlue, 16);
page.Graphics.DrawString("Lines", titleFont, brush, 20, 50);
page.Graphics.DrawString("Line styles:", sectionFont, brush, 20, 70);
page.Graphics.DrawString("Solid", sectionFont, brush, 20, 90);
page.Graphics.DrawLine(blackPen, 100, 95, 400, 95);
page.Graphics.DrawString("Dashed", sectionFont, brush, 20, 110);
blackPen.DashPattern = new double[] { 3, 3 };
page.Graphics.DrawLine(blackPen, 100, 115, 400, 115);
page.Graphics.DrawString("Line cap styles:", sectionFont, brush, 20, 150);
page.Graphics.DrawString("Flat", sectionFont, brush, 20, 175);
page.Graphics.DrawLine(bluePen, 100, 180, 400, 180);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 180, 400, 180);
page.Graphics.DrawString("Square", sectionFont, brush, 20, 195);
bluePen.LineCap = PdfLineCap.Square;
page.Graphics.DrawLine(bluePen, 100, 200, 400, 200);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 200, 400, 200);
page.Graphics.DrawString("Round", sectionFont, brush, 20, 215);
bluePen.LineCap = PdfLineCap.Round;
page.Graphics.DrawLine(bluePen, 100, 220, 400, 220);
blackPen.DashPattern = null;
page.Graphics.DrawLine(blackPen, 100, 220, 400, 220);
page.Graphics.DrawString("Line join styles:", sectionFont, brush, 20, 250);
page.Graphics.DrawString("Miter", sectionFont, brush, 20, 280);
PdfPath miterPath = new PdfPath();
miterPath.StartSubpath(150, 320);
miterPath.AddLineTo(250, 260);
miterPath.AddLineTo(350, 320);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Miter;
page.Graphics.DrawPath(bluePen, miterPath);
page.Graphics.DrawString("Bevel", sectionFont, brush, 20, 360);
PdfPath bevelPath = new PdfPath();
bevelPath.StartSubpath(150, 400);
bevelPath.AddLineTo(250, 340);
bevelPath.AddLineTo(350, 400);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Bevel;
page.Graphics.DrawPath(bluePen, bevelPath);
page.Graphics.DrawString("Round", sectionFont, brush, 20, 440);
PdfPath roundPath = new PdfPath();
roundPath.StartSubpath(150, 480);
roundPath.AddLineTo(250, 420);
roundPath.AddLineTo(350, 480);
bluePen.LineCap = PdfLineCap.Flat;
bluePen.LineJoin = PdfLineJoin.Round;
page.Graphics.DrawPath(bluePen, roundPath);
page.Graphics.DrawString("Random lines clipped to rectangle", sectionFont, brush, 20, 520);
PdfPath clipPath = new PdfPath();
clipPath.AddRectangle(20, 550, 570, 230);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(clipPath);
PdfRgbColor randomColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomColor, 1);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomColor.R = (byte)rnd.Next(256);
randomColor.G = (byte)rnd.Next(256);
randomColor.B = (byte)rnd.Next(256);
page.Graphics.DrawLine(randomPen, rnd.NextDouble() * page.Width, 550 + rnd.NextDouble() * 250, rnd.NextDouble() * page.Width, 550 + rnd.NextDouble() * 250);
}
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, clipPath);
page.Graphics.CompressAndClose();
}
private static void DrawRoundRectangles(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfPen redPen = new PdfPen(PdfRgbColor.Red, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Round rectangles", titleFont, brush, 20, 50);
page.Graphics.DrawLine(blackPen, 20, 150, 300, 150);
page.Graphics.DrawLine(blackPen, 80, 70, 80, 350);
page.Graphics.DrawRoundRectangle(redPen, 80, 150, 180, 100, 20, 20);
page.Graphics.DrawLine(blackPen, 320, 150, 600, 150);
page.Graphics.DrawLine(blackPen, 380, 70, 380, 350);
page.Graphics.DrawRoundRectangle(redPen, 380, 150, 180, 100, 20, 20, 30);
page.Graphics.DrawString("Random round rectangles clipped to view", sectionFont, brush, 20, 385);
PdfPath roundRectPath = new PdfPath();
roundRectPath.AddRoundRectangle(20, 400, 570, 300, 20, 20);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(roundRectPath);
Random rnd = new Random();
for (int i = 0; i < 100; i++)
{
randomPenColor.R = (byte)rnd.Next(256);
randomPenColor.G = (byte)rnd.Next(256);
randomPenColor.B = (byte)rnd.Next(256);
randomBrushColor.R = (byte)rnd.Next(256);
randomBrushColor.G = (byte)rnd.Next(256);
randomBrushColor.B = (byte)rnd.Next(256);
int mode = rnd.Next(3);
double left = rnd.NextDouble() * page.Width;
double top = 380 + rnd.NextDouble() * 350;
double width = rnd.NextDouble() * page.Width;
double height = rnd.NextDouble() * 250;
double orientation = rnd.Next(360);
switch (mode)
{
case 0:
// Stroke rectangle outline
page.Graphics.DrawRoundRectangle(randomPen, left, top, width, height, width * 0.1, height * 0.1, orientation);
break;
case 1:
// Fill rectangle interior
page.Graphics.DrawRoundRectangle(randomBrush, left, top, width, height, width * 0.1, height * 0.1, orientation);
break;
case 2:
// Stroke and fill rectangle
page.Graphics.DrawRoundRectangle(randomPen, randomBrush, left, top, width, height, width * 0.1, height * 0.1, orientation);
break;
}
}
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, roundRectPath);
page.Graphics.CompressAndClose();
}
private static void DrawShadings(PdfPage page, PdfFont titleFont, PdfFont sectionFont)
{
PdfBrush brush = new PdfBrush();
PdfPen blackPen = new PdfPen(PdfRgbColor.Black, 1);
PdfRgbColor randomPenColor = new PdfRgbColor();
PdfPen randomPen = new PdfPen(randomPenColor, 1);
PdfRgbColor randomBrushColor = new PdfRgbColor();
PdfBrush randomBrush = new PdfBrush(randomBrushColor);
page.Graphics.DrawString("Shadings", titleFont, brush, 20, 50);
page.Graphics.DrawString("Horizontal", sectionFont, brush, 25, 70);
PdfAxialShading horizontalShading = new PdfAxialShading();
horizontalShading.StartColor = new PdfRgbColor(255, 0, 0);
horizontalShading.EndColor = new PdfRgbColor(0, 0, 255);
horizontalShading.StartPoint = new PdfPoint(25, 90);
horizontalShading.EndPoint = new PdfPoint(175, 90);
// Clip the shading to desired area.
PdfPath hsArea = new PdfPath();
hsArea.AddRectangle(25, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(hsArea);
page.Graphics.DrawShading(horizontalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Vertical", sectionFont, brush, 225, 70);
PdfAxialShading verticalShading = new PdfAxialShading();
verticalShading.StartColor = new PdfRgbColor(255, 0, 0);
verticalShading.EndColor = new PdfRgbColor(0, 0, 255);
verticalShading.StartPoint = new PdfPoint(225, 90);
verticalShading.EndPoint = new PdfPoint(225, 240);
// Clip the shading to desired area.
PdfPath vsArea = new PdfPath();
vsArea.AddRectangle(225, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(vsArea);
page.Graphics.DrawShading(verticalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Diagonal", sectionFont, brush, 425, 70);
PdfAxialShading diagonalShading = new PdfAxialShading();
diagonalShading.StartColor = new PdfRgbColor(255, 0, 0);
diagonalShading.EndColor = new PdfRgbColor(0, 0, 255);
diagonalShading.StartPoint = new PdfPoint(425, 90);
diagonalShading.EndPoint = new PdfPoint(575, 240);
// Clip the shading to desired area.
PdfPath dsArea = new PdfPath();
dsArea.AddRectangle(425, 90, 150, 150);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(dsArea);
page.Graphics.DrawShading(diagonalShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawString("Extended shading", sectionFont, brush, 25, 260);
PdfAxialShading extendedShading = new PdfAxialShading();
extendedShading.StartColor = new PdfRgbColor(255, 0, 0);
extendedShading.EndColor = new PdfRgbColor(0, 0, 255);
extendedShading.StartPoint = new PdfPoint(225, 280);
extendedShading.EndPoint = new PdfPoint(375, 280);
extendedShading.ExtendStart = true;
extendedShading.ExtendEnd = true;
// Clip the shading to desired area.
PdfPath esArea = new PdfPath();
esArea.AddRectangle(25, 280, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(esArea);
page.Graphics.DrawShading(extendedShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, esArea);
page.Graphics.DrawString("Limited shading", sectionFont, brush, 25, 330);
PdfAxialShading limitedShading = new PdfAxialShading();
limitedShading.StartColor = new PdfRgbColor(255, 0, 0);
limitedShading.EndColor = new PdfRgbColor(0, 0, 255);
limitedShading.StartPoint = new PdfPoint(225, 350);
limitedShading.EndPoint = new PdfPoint(375, 350);
limitedShading.ExtendStart = false;
limitedShading.ExtendEnd = false;
// Clip the shading to desired area.
PdfPath lsArea = new PdfPath();
lsArea.AddRectangle(25, 350, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(lsArea);
page.Graphics.DrawShading(limitedShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, lsArea);
page.Graphics.DrawString("Multi-stop shading", sectionFont, brush, 25, 400);
// Multi-stop shadings use a stitching function to combine the functions that define each gradient part.
// Function for red to blue shading.
PdfExponentialFunction redToBlueFunc = new PdfExponentialFunction();
// Linear function
redToBlueFunc.Exponent = 1;
redToBlueFunc.Domain = new double[] { 0, 1 };
// Red color for start
redToBlueFunc.C0 = new double[] { 1, 0, 0 };
// Blue color for start
redToBlueFunc.C1 = new double[] { 0, 0, 1 };
// Function for blue to green shading.
PdfExponentialFunction blueToGreenFunc = new PdfExponentialFunction();
// Linear function
blueToGreenFunc.Exponent = 1;
blueToGreenFunc.Domain = new double[] { 0, 1 };
// Blue color for start
blueToGreenFunc.C0 = new double[] { 0, 0, 1 };
// Green color for start
blueToGreenFunc.C1 = new double[] { 0, 1, 0 };
//Stitching function for the shading.
PdfStitchingFunction shadingFunction = new PdfStitchingFunction();
shadingFunction.Functions.Add(redToBlueFunc);
shadingFunction.Functions.Add(blueToGreenFunc);
shadingFunction.Domain = new double[] { 0, 1 };
shadingFunction.Encode = new double[] { 0, 1, 0, 1 };
// Entire shading goes from 0 to 1 (100%).
// We set the first shading (red->blue) to cover 30% (0 - 0.3) and
// the second shading to cover 70% (0.3 - 1).
shadingFunction.Bounds = new double[] { 0.3 };
// The multistop shading
PdfAxialShading multiStopShading = new PdfAxialShading();
multiStopShading.StartPoint = new PdfPoint(25, 420);
multiStopShading.EndPoint = new PdfPoint(575, 420);
// The colorspace must match the colors specified in C0 & C1
multiStopShading.ColorSpace = new PdfRgbColorSpace();
multiStopShading.Function = shadingFunction;
// Clip the shading to desired area.
PdfPath mssArea = new PdfPath();
mssArea.AddRectangle(25, 420, 550, 30);
page.Graphics.SaveGraphicsState();
page.Graphics.SetClip(mssArea);
page.Graphics.DrawShading(multiStopShading);
page.Graphics.RestoreGraphicsState();
page.Graphics.DrawPath(blackPen, lsArea);
page.Graphics.DrawString("Radial shading", sectionFont, brush, 25, 470);
PdfRadialShading rs1 = new PdfRadialShading();
rs1.StartColor = new PdfRgbColor(0, 255, 0);
rs1.EndColor = new PdfRgbColor(255, 0, 255);
rs1.StartCircleCenter = new PdfPoint(50, 500);
rs1.StartCircleRadius = 10;
rs1.EndCircleCenter = new PdfPoint(500, 570);
rs1.EndCircleRadius = 100;
page.Graphics.DrawShading(rs1);
PdfRadialShading rs2 = new PdfRadialShading();
rs2.StartColor = new PdfRgbColor(0, 255, 0);
rs2.EndColor = new PdfRgbColor(255, 0, 255);
rs2.StartCircleCenter = new PdfPoint(80, 600);
rs2.StartCircleRadius = 10;
rs2.EndCircleCenter = new PdfPoint(110, 690);
rs2.EndCircleRadius = 100;
page.Graphics.DrawShading(rs2);
page.Graphics.CompressAndClose();
}