[SerializableAttribute()]
public struct RasterColor
@interface LTRasterColor : NSObject <NSCopying, NSCoding>
public final class RasterColor
[SerializableAttribute()]
public value class RasterColor : public System.ValueType
class RasterColor:
The LEADTOOLS RasterColor class provides a platform independent representation of an ARGB color that can be used in any platform supported by LEADTOOLS such as GDI, GDI+, and WPF.
To convert a LEADTOOLS RasterColor object to/from a device dependent color, you can either use the various properties of methods of this class (such as the A, R, G, B properties and the RasterColor(int alpha, int red, int green, int blue) constructor) directly, or use the following helper classes:
In the Document and Medical toolkits, the COLORREF value can represent a 16-bit grayscale value if RasterImage is a 12- or 16-bit grayscale bitmap. To avoid confusion with an RGB value, set the COLORREF_GRAY16 mask (0x04000000). In this case (0x0400YYYY), the lower 16 bits (0xYYYY) of the COLORREF value represent the 16-bit grayscale value. (0x0400FFFF is 16-bit white and 0x04000000 is 16-bit black.) These are not standard Windows values. Therefore, although LEADTOOLS methods will recognize a COLORREF having this format, Windows methods will not.
using Leadtools;
public void RasterColorArgbExample()
{
const int A = 128, R = 24, G = 87, B = 134;
// Create a RasterColor
RasterColor clr = new RasterColor(A, R, G, B);
// Make sure the color is correct
Assert.IsTrue(clr.A == A);
Assert.IsTrue(clr.R == R);
Assert.IsTrue(clr.G == G);
Assert.IsTrue(clr.B == B);
// The ARGB values represent real color components. This is NOT a palette index.
Assert.IsFalse(clr.IsPaletteIndex);
// Show its value
Console.WriteLine(clr);
// Show the A, R, G and B values
Console.WriteLine("Alpha value: " + clr.A);
Console.WriteLine("Red value: " + clr.R);
Console.WriteLine("Green value: " + clr.G);
Console.WriteLine("Blue value: " + clr.B);
// When the color is a palette index, the ARGB values are not color components
int index = 128;
RasterColor peletteIndex = RasterColor.FromPaletteIndex(index);
Assert.IsTrue(peletteIndex.IsPaletteIndex);
// The use the ToRGB method to obtain the index
Assert.IsTrue(peletteIndex.ToRgb() == index);
}
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