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 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();
}
