How do I create graphics with Icc based colors

How do I create graphics with Icc based colors

This article explains how one creates graphics that use Icc based colors.

Creating an Icc based color

Creating a Icc based color takes two steps.

First, you will need to create an Icc color space. You can do this by passing (a stream to) an icc profile to the IccColorSpace constructor, as follows:

IccColorSpace D50_XYZ = null;
using (FileStream iccStream = new FileStream(@"..\..\D50_XYZ.icc", FileMode.Open))
{
  D50_XYZ = new IccColorSpace(iccStream);
}

Dim D50_XYZ As IccColorSpace = Nothing
Using iccStream As New FileStream("..\..\D50_XYZ.icc", FileMode.Open)
	D50_XYZ = New IccColorSpace(iccStream)
End Using

The second step is to actually create a color based on that color profile, by passing in the color space to the IccBasedColor constructor, together with an array of color components.

double[] components3 = new double[3];
components3[0] = 196;
components3[1] = 128;
components3[2] = 64;

IccBasedColor iccColor1 = new IccBasedColor(D50_XYZ, components3);

Dim components3 As Double() = New Double(2) {}
components3(0) = 196
components3(1) = 128
components3(2) = 64

Dim iccColor1 As New IccBasedColor(D50_XYZ, components3)

Please note that color profiles are defined for a particular number of components. If you create an IccBasedColor instance, it must be created with the correct number of color components for that color profile. This number can be found in color space instance:

D50_XYZ.NumberOfComponents;

Please also note that our software has no provisions for creating icc profiles. Icc profiles generally come with particular color devices. They specify the color characteristic of such a device for the color components that they produce or consume. If you want to incorporate a particular color that some color input device produces (a scanner for example), you would create an Icc color space based on the icc profile of the device, and create an Icc based color with that color space and the color components that the device produces.

Complete Sample

Below you will find the code of a complete sample that draws a number of squares on a page that are all filled with an Icc based color.

// create a new document with rectangles that are filled using an IccBasedColor.
Document document = new Document();

Page page = new Page(PageSize.Letter);
document.Pages.Add(page);

IccColorSpace D50_XYZ = null;
using (FileStream iccStream = new FileStream(@"..\..\D50_XYZ.icc", FileMode.Open))
{
	D50_XYZ = new IccColorSpace(iccStream);
}

IccColorSpace sRGB = null;
using (FileStream iccStream = new FileStream(@"..\..\sRGB.icm", FileMode.Open))
{
	sRGB = new IccColorSpace(iccStream);
}

IccColorSpace sRGB_IEC61966 = null;
using (FileStream iccStream = new FileStream(
  @"..\..\sRGB_IEC61966-2-1_black_scaled.icc", FileMode.Open))
{
	sRGB_IEC61966 = new IccColorSpace(iccStream);
}

IccColorSpace USWebUncoated = null;
using (FileStream iccStream = new FileStream(@"..\..\USWebUncoated.icc", FileMode.Open))
{
	USWebUncoated = new IccColorSpace(iccStream);
}

double[] components3 = new double[3];
components3[0] = 196;
components3[1] = 128;
components3[2] = 64;

double[] components4 = new double[4];
components4[0] = 16;
components4[1] = 128;
components4[2] = 16;
components4[3] = 0;

RectangleShape rectangleShape1 = new RectangleShape(100, 400, 100, 100);
IccBasedColor iccColor1 = new IccBasedColor(D50_XYZ, components3);
rectangleShape1.Brush = new SolidBrush(iccColor1);

RectangleShape rectangleShape2 = new RectangleShape(250, 400, 100, 100);
IccBasedColor iccColor2 = new IccBasedColor(sRGB, components3);
rectangleShape2.Brush = new SolidBrush(iccColor2);

RectangleShape rectangleShape3 = new RectangleShape(400, 400, 100, 100);
IccBasedColor iccColor3 = new IccBasedColor(sRGB_IEC61966, components3);
rectangleShape3.Brush = new SolidBrush(iccColor3);

RectangleShape rectangleShape4 = new RectangleShape(100, 250, 100, 100);
IccBasedColor iccColor4 = new IccBasedColor(USWebUncoated, components4);
rectangleShape4.Brush = new SolidBrush(iccColor4);

page.VisualOverlay.Add(rectangleShape1);
page.VisualOverlay.Add(rectangleShape2);
page.VisualOverlay.Add(rectangleShape3);
page.VisualOverlay.Add(rectangleShape4);

using (FileStream file = new FileStream(@"..\..\iccColors.pdf", FileMode.Create, FileAccess.Write))
{
	document.Write(file);
}

' create a new document with rectangles that are filled using an IccBasedColor.
Dim document As New Document()

Dim page As New Page(PageSize.Letter)
document.Pages.Add(page)

Dim D50_XYZ As IccColorSpace = Nothing
Using iccStream As New FileStream("..\..\D50_XYZ.icc", FileMode.Open)
    D50_XYZ = New IccColorSpace(iccStream)
End Using

Dim sRGB As IccColorSpace = Nothing
Using iccStream As New FileStream("..\..\sRGB.icm", FileMode.Open)
    sRGB = New IccColorSpace(iccStream)
End Using

Dim sRGB_IEC61966 As IccColorSpace = Nothing
Using iccStream As New FileStream("..\..\sRGB_IEC61966-2-1_black_scaled.icc", FileMode.Open)
    sRGB_IEC61966 = New IccColorSpace(iccStream)
End Using

Dim USWebUncoated As IccColorSpace = Nothing
Using iccStream As New FileStream("..\..\USWebUncoated.icc", FileMode.Open)
    USWebUncoated = New IccColorSpace(iccStream)
End Using

Dim components3 As Double() = New Double(2) {}
components3(0) = 196
components3(1) = 128
components3(2) = 64

Dim components4 As Double() = New Double(3) {}
components4(0) = 16
components4(1) = 128
components4(2) = 16
components4(3) = 0

Dim rectangleShape1 As New RectangleShape(100, 400, 100, 100)
Dim iccColor1 As New IccBasedColor(D50_XYZ, components3)
rectangleShape1.Brush = New SolidBrush(iccColor1)

Dim rectangleShape2 As New RectangleShape(250, 400, 100, 100)
Dim iccColor2 As New IccBasedColor(sRGB, components3)
rectangleShape2.Brush = New SolidBrush(iccColor2)

Dim rectangleShape3 As New RectangleShape(400, 400, 100, 100)
Dim iccColor3 As New IccBasedColor(sRGB_IEC61966, components3)
rectangleShape3.Brush = New SolidBrush(iccColor3)

Dim rectangleShape4 As New RectangleShape(100, 250, 100, 100)
Dim iccColor4 As New IccBasedColor(USWebUncoated, components4)
rectangleShape4.Brush = New SolidBrush(iccColor4)

page.VisualOverlay.Add(rectangleShape1)
page.VisualOverlay.Add(rectangleShape2)
page.VisualOverlay.Add(rectangleShape3)
page.VisualOverlay.Add(rectangleShape4)

Using file As New FileStream("..\..\iccColors.pdf", FileMode.Create, FileAccess.Write)
    document.Write(file)
End Using

The code above results in 4 squares. Note that the topmost 3 all use the same color components, but that their colors differ (slightly) because they use a different Icc color space. The square at the bottom uses a color space that needs 4 components instead of one.

IccColors