Working with Color Spaces
22 Jul 202624 minutes to read
The Syncfusion® .NET PDF library allows you to apply color spaces in the following ways:
Working with color spaces in a document
You can set the color space by using the ColorSpace property of the PdfDocument class. The following color space categories are supported:
Device color space
Device color space simply describes the range of colors that a camera can see, a printer can print, or a monitor can display. These color spaces depend on the device on which the document is displayed. The following types are supported:
- DeviceGray
- DeviceRGB
- DeviceCMYK
CIE-based color spaces
CIE-based color space in the PDF document is classified as follows:
- CalGray
- CalRGB
- Lab
You can draw a rectangle on a new PDF document with a CalGray brush using the PdfCalGrayColorSpace class. The following code example illustrates this.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
// Create a CalGray color space
PdfCalGrayColorSpace calGrayColorSpace = new PdfCalGrayColorSpace();
// Update the color values
calGrayColorSpace.Gamma = 0.7;
calGrayColorSpace.WhitePoint = new double[] { 0.2, 1, 0.8 };
// Apply the color space to a brush
PdfCalGrayColor calGrayColor = new PdfCalGrayColor(calGrayColorSpace);
calGrayColor.Gray = 0.1;
PdfBrush brush = new PdfSolidBrush(calGrayColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
// Create a CalGray color space
PdfCalGrayColorSpace calGrayColorSpace = new PdfCalGrayColorSpace();
// Update the color values
calGrayColorSpace.Gamma = 0.7;
calGrayColorSpace.WhitePoint = new double[] { 0.2, 1, 0.8 };
// Apply the color space to a brush
PdfCalGrayColor calGrayColor = new PdfCalGrayColor(calGrayColorSpace);
calGrayColor.Gray = 0.1;
PdfBrush brush = new PdfSolidBrush(calGrayColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Graphics
' Create a new PDF document
Dim document As New PdfDocument()
' Add a page to the PDF document
Dim page As PdfPage = document.Pages.Add()
' Acquire the graphics of the page
Dim graphics As PdfGraphics = page.Graphics
' Create a CalGray color space
Dim calGrayColorSpace As New PdfCalGrayColorSpace()
' Update the color values
calGrayColorSpace.Gamma = 0.7
calGrayColorSpace.WhitePoint = New Double() {0.2, 1, 0.8}
' Apply the color space to a brush
Dim calGrayColor As New PdfCalGrayColor(calGrayColorSpace)
calGrayColor.Gray = 0.1
Dim brush As PdfBrush = New PdfSolidBrush(calGrayColor)
Dim bounds As New RectangleF(0, 0, 300, 300)
' Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds)
' Save the document
document.Save("Output.pdf")
' Close the document
document.Close(True)You can download a complete working sample from GitHub.
The following code example illustrates how to draw a rectangle with a CalGray brush in an existing PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
// Create a CalGray color space
PdfCalGrayColorSpace calGrayColorSpace = new PdfCalGrayColorSpace();
// Update the color values
calGrayColorSpace.Gamma = 0.7;
calGrayColorSpace.WhitePoint = new double[] { 0.2, 1, 0.8 };
// Apply the color space to a brush
PdfCalGrayColor calGrayColor = new PdfCalGrayColor(calGrayColorSpace);
calGrayColor.Gray = 0.1;
PdfBrush brush = new PdfSolidBrush(calGrayColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the modified document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
// Create a CalGray color space
PdfCalGrayColorSpace calGrayColorSpace = new PdfCalGrayColorSpace();
// Update the color values
calGrayColorSpace.Gamma = 0.7;
calGrayColorSpace.WhitePoint = new double[] { 0.2, 1, 0.8 };
// Apply the color space to a brush
PdfCalGrayColor calGrayColor = new PdfCalGrayColor(calGrayColorSpace);
calGrayColor.Gray = 0.1;
PdfBrush brush = new PdfSolidBrush(calGrayColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the modified document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Parsing
' Load the existing PDF document
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
' Load the first page
Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
' Acquire the graphics of the page
Dim graphics As PdfGraphics = loadedPage.Graphics
' Create a CalGray color space
Dim calGrayColorSpace As New PdfCalGrayColorSpace()
' Update the color values
calGrayColorSpace.Gamma = 0.7
calGrayColorSpace.WhitePoint = New Double() {0.2, 1, 0.8}
' Apply the color space to a brush
Dim calGrayColor As New PdfCalGrayColor(calGrayColorSpace)
calGrayColor.Gray = 0.1
Dim brush As PdfBrush = New PdfSolidBrush(calGrayColor)
Dim bounds As New RectangleF(0, 0, 300, 300)
' Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds)
' Save the modified document
loadedDocument.Save("Output.pdf")
' Close the document
loadedDocument.Close(True)You can download a complete working sample from GitHub.
ICC-based color spaces
To create a color for a brush or pen used to render a shape or text in the PDF document, you can use ICC-based color spaces.
The following types are supported:
- Special color spaces – Pantone colors
- Indexed
- Separation
The following code example illustrates how to set the indexed ICC color space using the PdfCalRGBColorSpace and PdfICCColorSpace classes in a new PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
// Create a CalRGB color space to use as the alternate color space
PdfCalRGBColorSpace calRgbCS = new PdfCalRGBColorSpace();
calRgbCS.Gamma = new double[] { 7.6, 5.1, 8.5 };
calRgbCS.Matrix = new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
calRgbCS.WhitePoint = new double[] { 0.7, 1, 0.8 };
// Read the ICC profile from a file
byte[] profileData;
using (FileStream fileStream = new FileStream("input.icc", FileMode.Open, FileAccess.Read))
{
profileData = new byte[fileStream.Length];
fileStream.Read(profileData, 0, profileData.Length);
}
// Instantiate the ICC color space and configure it
PdfICCColorSpace iccBasedCS = new PdfICCColorSpace();
iccBasedCS.ProfileData = profileData;
iccBasedCS.AlternateColorSpace = calRgbCS;
iccBasedCS.ColorComponents = 3;
iccBasedCS.Range = new double[] { 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 };
PdfICCColor redColor = new PdfICCColor(iccBasedCS);
redColor.ColorComponents = new double[] { 1, 0, 1 };
PdfBrush brush = new PdfSolidBrush(redColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
// Create a CalRGB color space to use as the alternate color space
PdfCalRGBColorSpace calRgbCS = new PdfCalRGBColorSpace();
calRgbCS.Gamma = new double[] { 7.6, 5.1, 8.5 };
calRgbCS.Matrix = new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
calRgbCS.WhitePoint = new double[] { 0.7, 1, 0.8 };
// Read the ICC profile from a file
byte[] profileData;
using (FileStream fileStream = new FileStream("input.icc", FileMode.Open, FileAccess.Read))
{
profileData = new byte[fileStream.Length];
fileStream.Read(profileData, 0, profileData.Length);
}
// Instantiate the ICC color space and configure it
PdfICCColorSpace iccBasedCS = new PdfICCColorSpace();
iccBasedCS.ProfileData = profileData;
iccBasedCS.AlternateColorSpace = calRgbCS;
iccBasedCS.ColorComponents = 3;
iccBasedCS.Range = new double[] { 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 };
PdfICCColor redColor = new PdfICCColor(iccBasedCS);
redColor.ColorComponents = new double[] { 1, 0, 1 };
PdfBrush brush = new PdfSolidBrush(redColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Graphics
' Create a new PDF document
Dim document As New PdfDocument()
' Add a page to the PDF document
Dim page As PdfPage = document.Pages.Add()
' Acquire the graphics of the page
Dim graphics As PdfGraphics = page.Graphics
' Create a CalRGB color space to use as the alternate color space
Dim calRgbCS As New PdfCalRGBColorSpace()
calRgbCS.Gamma = New Double() {7.6, 5.1, 8.5}
calRgbCS.Matrix = New Double() {1, 0, 0, 0, 1, 0, 0, 0, 1}
calRgbCS.WhitePoint = New Double() {0.7, 1, 0.8}
' Read the ICC profile from a file
Dim profileData As Byte()
Using fileStream As New FileStream("input.icc", FileMode.Open, FileAccess.Read)
ReDim profileData(CInt(fileStream.Length) - 1)
fileStream.Read(profileData, 0, profileData.Length)
End Using
' Instantiate the ICC color space and configure it
Dim iccBasedCS As New PdfICCColorSpace()
iccBasedCS.ProfileData = profileData
iccBasedCS.AlternateColorSpace = calRgbCS
iccBasedCS.ColorComponents = 3
iccBasedCS.Range = New Double() {0.0, 1.0, 0.0, 1.0, 0.0, 1.0}
Dim redColor As New PdfICCColor(iccBasedCS)
redColor.ColorComponents = New Double() {1, 0, 1}
Dim brush As PdfBrush = New PdfSolidBrush(redColor)
Dim bounds As New RectangleF(0, 0, 300, 300)
' Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds)
' Save the document
document.Save("Output.pdf")
' Close the document
document.Close(True)You can download a complete working sample from GitHub.
The following code example illustrates how to set the indexed ICC color space in an existing PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
// Create a CalRGB color space to use as the alternate color space
PdfCalRGBColorSpace calRgbCS = new PdfCalRGBColorSpace();
calRgbCS.Gamma = new double[] { 7.6, 5.1, 8.5 };
calRgbCS.Matrix = new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
calRgbCS.WhitePoint = new double[] { 0.7, 1, 0.8 };
// Read the ICC profile from a file
byte[] profileData;
using (FileStream fileStream = new FileStream("input.icc", FileMode.Open, FileAccess.Read))
{
profileData = new byte[fileStream.Length];
fileStream.Read(profileData, 0, profileData.Length);
}
// Instantiate the ICC color space and configure it
PdfICCColorSpace iccBasedCS = new PdfICCColorSpace();
iccBasedCS.ProfileData = profileData;
iccBasedCS.AlternateColorSpace = calRgbCS;
iccBasedCS.ColorComponents = 3;
iccBasedCS.Range = new double[] { 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 };
PdfICCColor redColor = new PdfICCColor(iccBasedCS);
redColor.ColorComponents = new double[] { 1, 0, 1 };
PdfBrush brush = new PdfSolidBrush(redColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
// Create a CalRGB color space to use as the alternate color space
PdfCalRGBColorSpace calRgbCS = new PdfCalRGBColorSpace();
calRgbCS.Gamma = new double[] { 7.6, 5.1, 8.5 };
calRgbCS.Matrix = new double[] { 1, 0, 0, 0, 1, 0, 0, 0, 1 };
calRgbCS.WhitePoint = new double[] { 0.7, 1, 0.8 };
// Read the ICC profile from a file
byte[] profileData;
using (FileStream fileStream = new FileStream("input.icc", FileMode.Open, FileAccess.Read))
{
profileData = new byte[fileStream.Length];
fileStream.Read(profileData, 0, profileData.Length);
}
// Instantiate the ICC color space and configure it
PdfICCColorSpace iccBasedCS = new PdfICCColorSpace();
iccBasedCS.ProfileData = profileData;
iccBasedCS.AlternateColorSpace = calRgbCS;
iccBasedCS.ColorComponents = 3;
iccBasedCS.Range = new double[] { 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 };
PdfICCColor redColor = new PdfICCColor(iccBasedCS);
redColor.ColorComponents = new double[] { 1, 0, 1 };
PdfBrush brush = new PdfSolidBrush(redColor);
RectangleF bounds = new RectangleF(0, 0, 300, 300);
// Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds);
// Save the document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Parsing
' Load the existing PDF document
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
' Load the first page
Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
' Acquire the graphics of the page
Dim graphics As PdfGraphics = loadedPage.Graphics
' Create a CalRGB color space to use as the alternate color space
Dim calRgbCS As New PdfCalRGBColorSpace()
calRgbCS.Gamma = New Double() {7.6, 5.1, 8.5}
calRgbCS.Matrix = New Double() {1, 0, 0, 0, 1, 0, 0, 0, 1}
calRgbCS.WhitePoint = New Double() {0.7, 1, 0.8}
' Read the ICC profile from a file
Dim profileData As Byte()
Using fileStream As New FileStream("input.icc", FileMode.Open, FileAccess.Read)
ReDim profileData(CInt(fileStream.Length) - 1)
fileStream.Read(profileData, 0, profileData.Length)
End Using
' Instantiate the ICC color space and configure it
Dim iccBasedCS As New PdfICCColorSpace()
iccBasedCS.ProfileData = profileData
iccBasedCS.AlternateColorSpace = calRgbCS
iccBasedCS.ColorComponents = 3
iccBasedCS.Range = New Double() {0.0, 1.0, 0.0, 1.0, 0.0, 1.0}
Dim redColor As New PdfICCColor(iccBasedCS)
redColor.ColorComponents = New Double() {1, 0, 1}
Dim brush As PdfBrush = New PdfSolidBrush(redColor)
Dim bounds As New RectangleF(0, 0, 300, 300)
' Draw a rectangle using the brush
graphics.DrawRectangle(brush, bounds)
' Save the document
loadedDocument.Save("Output.pdf")
' Close the document
loadedDocument.Close(True)You can download a complete working sample from GitHub.
Pantone colors
The following code example illustrates how to draw graphics elements by using Pantone colors through the PdfSeparationColorSpace class in a new PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Functions;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Create an exponential interpolation function used to map the tint value
PdfExponentialInterpolationFunction function = new PdfExponentialInterpolationFunction(true);
function.C1 = new float[] { 0.38f, 0.88f };
// Create the separation color space for the Pantone color
PdfSeparationColorSpace colorSpace = new PdfSeparationColorSpace();
colorSpace.TintTransform = function;
colorSpace.Colorant = "PANTONE Orange 021 C";
// Apply the color space to a pen
PdfSeparationColor color = new PdfSeparationColor(colorSpace);
color.Tint = 0.7;
RectangleF bounds = new RectangleF(20, 70, 200, 100);
PdfPen pen = new PdfPen(color);
// Draw a rectangle using the pen
page.Graphics.DrawRectangle(pen, bounds);
// Save the document
document.Save("SeparationColor.pdf");
// Close the document
document.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Functions;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Create an exponential interpolation function used to map the tint value
PdfExponentialInterpolationFunction function = new PdfExponentialInterpolationFunction(true);
function.C1 = new float[] { 0.38f, 0.88f };
// Create the separation color space for the Pantone color
PdfSeparationColorSpace colorSpace = new PdfSeparationColorSpace();
colorSpace.TintTransform = function;
colorSpace.Colorant = "PANTONE Orange 021 C";
// Apply the color space to a pen
PdfSeparationColor color = new PdfSeparationColor(colorSpace);
color.Tint = 0.7;
RectangleF bounds = new RectangleF(20, 70, 200, 100);
PdfPen pen = new PdfPen(color);
// Draw a rectangle using the pen
page.Graphics.DrawRectangle(pen, bounds);
// Save the document
document.Save("SeparationColor.pdf");
// Close the document
document.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Functions
Imports Syncfusion.Pdf.Graphics
' Create a new PDF document
Dim document As New PdfDocument()
' Add a page to the PDF document
Dim page As PdfPage = document.Pages.Add()
' Create an exponential interpolation function used to map the tint value
Dim function As New PdfExponentialInterpolationFunction(True)
function.C1 = New Single() {0.38F, 0.88F}
' Create the separation color space for the Pantone color
Dim colorSpace As New PdfSeparationColorSpace()
colorSpace.TintTransform = function
colorSpace.Colorant = "PANTONE Orange 021 C"
' Apply the color space to a pen
Dim color As New PdfSeparationColor(colorSpace)
color.Tint = 0.7
Dim bounds As New RectangleF(20, 70, 200, 100)
Dim pen As New PdfPen(color)
' Draw a rectangle using the pen
page.Graphics.DrawRectangle(pen, bounds)
' Save the document
document.Save("SeparationColor.pdf")
' Close the document
document.Close(True)You can download a complete working sample from GitHub.
The following code example illustrates how to draw graphics elements by using Pantone colors in an existing PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Functions;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Create an exponential interpolation function used to map the tint value
PdfExponentialInterpolationFunction function = new PdfExponentialInterpolationFunction(true);
function.C1 = new float[] { 0.38f, 0.88f };
// Create the separation color space for the Pantone color
PdfSeparationColorSpace colorSpace = new PdfSeparationColorSpace();
colorSpace.TintTransform = function;
colorSpace.Colorant = "PANTONE Orange 021 C";
// Apply the color space to a pen
PdfSeparationColor color = new PdfSeparationColor(colorSpace);
color.Tint = 0.7;
RectangleF bounds = new RectangleF(20, 70, 200, 100);
PdfPen pen = new PdfPen(color);
// Draw a rectangle using the pen
loadedPage.Graphics.DrawRectangle(pen, bounds);
// Save the document
loadedDocument.Save("SeparationColor.pdf");
// Close the document
loadedDocument.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.ColorSpace;
using Syncfusion.Pdf.Functions;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Create an exponential interpolation function used to map the tint value
PdfExponentialInterpolationFunction function = new PdfExponentialInterpolationFunction(true);
function.C1 = new float[] { 0.38f, 0.88f };
// Create the separation color space for the Pantone color
PdfSeparationColorSpace colorSpace = new PdfSeparationColorSpace();
colorSpace.TintTransform = function;
colorSpace.Colorant = "PANTONE Orange 021 C";
// Apply the color space to a pen
PdfSeparationColor color = new PdfSeparationColor(colorSpace);
color.Tint = 0.7;
RectangleF bounds = new RectangleF(20, 70, 200, 100);
PdfPen pen = new PdfPen(color);
// Draw a rectangle using the pen
loadedPage.Graphics.DrawRectangle(pen, bounds);
// Save the document
loadedDocument.Save("SeparationColor.pdf");
// Close the document
loadedDocument.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.ColorSpace
Imports Syncfusion.Pdf.Functions
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Parsing
' Load the existing PDF document
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
' Load the first page
Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
' Create an exponential interpolation function used to map the tint value
Dim function As New PdfExponentialInterpolationFunction(True)
function.C1 = New Single() {0.38F, 0.88F}
' Create the separation color space for the Pantone color
Dim colorSpace As New PdfSeparationColorSpace()
colorSpace.TintTransform = function
colorSpace.Colorant = "PANTONE Orange 021 C"
' Apply the color space to a pen
Dim color As New PdfSeparationColor(colorSpace)
color.Tint = 0.7
Dim bounds As New RectangleF(20, 70, 200, 100)
Dim pen As New PdfPen(color)
' Draw a rectangle using the pen
loadedPage.Graphics.DrawRectangle(pen, bounds)
' Save the document
loadedDocument.Save("SeparationColor.pdf")
' Close the document
loadedDocument.Close(True)You can download a complete working sample from GitHub.
Working with color spaces in graphics
You can set the color space for a particular object in a PDF document by using the ColorSpace property of the PdfGraphics class and specifying the color space as GrayScale or CMYK from the PdfColorSpace enumeration.
The following code example illustrates how to use the color spaces on particular objects in a new PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
PdfPen pen = new PdfPen(Color.Red);
PdfBrush brush = new PdfSolidBrush(Color.Blue);
RectangleF rectangle = new RectangleF(0, 0, 100, 100);
// Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Save();
// Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale;
graphics.DrawRectangle(pen, brush, rectangle);
// Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK;
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Restore();
// Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle);
graphics.DrawRectangle(brush, rectangle);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
// Create a new PDF document
PdfDocument document = new PdfDocument();
// Add a page to the PDF document
PdfPage page = document.Pages.Add();
// Acquire the graphics of the page
PdfGraphics graphics = page.Graphics;
PdfPen pen = new PdfPen(Color.Red);
PdfBrush brush = new PdfSolidBrush(Color.Blue);
RectangleF rectangle = new RectangleF(0, 0, 100, 100);
// Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Save();
// Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale;
graphics.DrawRectangle(pen, brush, rectangle);
// Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK;
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Restore();
// Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle);
graphics.DrawRectangle(brush, rectangle);
// Save the document
document.Save("Output.pdf");
// Close the document
document.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Graphics
' Create a new PDF document
Dim document As New PdfDocument()
' Add a page to the PDF document
Dim page As PdfPage = document.Pages.Add()
' Acquire the graphics of the page
Dim graphics As PdfGraphics = page.Graphics
Dim pen As New PdfPen(Color.Red)
Dim brush As New PdfSolidBrush(Color.Blue)
Dim rectangle As New RectangleF(0, 0, 100, 100)
' Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle)
graphics.Save()
' Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale
graphics.DrawRectangle(pen, brush, rectangle)
' Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK
graphics.DrawRectangle(pen, brush, rectangle)
graphics.Restore()
' Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle)
graphics.DrawRectangle(brush, rectangle)
' Save the document
document.Save("Output.pdf")
' Close the document
document.Close(True)You can download a complete working sample from GitHub.
The following code example illustrates how to use the color spaces on particular objects in an existing PDF document.
using Syncfusion.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
PdfPen pen = new PdfPen(Color.Red);
PdfBrush brush = new PdfSolidBrush(Color.Blue);
RectangleF rectangle = new RectangleF(0, 0, 100, 100);
// Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Save();
// Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale;
graphics.DrawRectangle(pen, brush, rectangle);
// Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK;
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Restore();
// Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle);
graphics.DrawRectangle(brush, rectangle);
// Save the document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);using System.Drawing;
using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using Syncfusion.Pdf.Parsing;
// Load the existing PDF document
PdfLoadedDocument loadedDocument = new PdfLoadedDocument("Input.pdf");
// Load the first page
PdfLoadedPage loadedPage = loadedDocument.Pages[0] as PdfLoadedPage;
// Acquire the graphics of the page
PdfGraphics graphics = loadedPage.Graphics;
PdfPen pen = new PdfPen(Color.Red);
PdfBrush brush = new PdfSolidBrush(Color.Blue);
RectangleF rectangle = new RectangleF(0, 0, 100, 100);
// Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Save();
// Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale;
graphics.DrawRectangle(pen, brush, rectangle);
// Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK;
graphics.DrawRectangle(pen, brush, rectangle);
graphics.Restore();
// Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle);
graphics.DrawRectangle(brush, rectangle);
// Save the document
loadedDocument.Save("Output.pdf");
// Close the document
loadedDocument.Close(true);Imports System.Drawing
Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Graphics
Imports Syncfusion.Pdf.Parsing
' Load the existing PDF document
Dim loadedDocument As New PdfLoadedDocument("Input.pdf")
' Load the first page
Dim loadedPage As PdfLoadedPage = TryCast(loadedDocument.Pages(0), PdfLoadedPage)
' Acquire the graphics of the page
Dim graphics As PdfGraphics = loadedPage.Graphics
Dim pen As New PdfPen(Color.Red)
Dim brush As New PdfSolidBrush(Color.Blue)
Dim rectangle As New RectangleF(0, 0, 100, 100)
' Draw using the default color space
graphics.DrawRectangle(pen, brush, rectangle)
graphics.Save()
' Use the GrayScale color space
graphics.ColorSpace = PdfColorSpace.GrayScale
graphics.DrawRectangle(pen, brush, rectangle)
' Use the CMYK color space
graphics.ColorSpace = PdfColorSpace.CMYK
graphics.DrawRectangle(pen, brush, rectangle)
graphics.Restore()
' Draw using the default color space again
graphics.DrawRectangle(pen, brush, rectangle)
graphics.DrawRectangle(brush, rectangle)
' Save the document
loadedDocument.Save("Output.pdf")
' Close the document
loadedDocument.Close(True)You can download a complete working sample from GitHub.