Examples with ColorSpace java.awt.color.ColorSpace used on opensource projects

Example 86 with ColorSpace

use of java.awt.color.ColorSpace in project sis by apache.

the class ColorModelFactory method createSubset.

/**
 * Creates a color model with only a subset of the bands of the given color model.
 *
 * @param  cm     the color model, or {@code null}.
 * @param  bands  the bands to select.
 * @return the subset color model, or {@code null} if it can not be created.
 */
public static ColorModel createSubset(final ColorModel cm, final int[] bands) {
    final ColorModel subset;
    if (cm instanceof MultiBandsIndexColorModel) {
        subset = ((MultiBandsIndexColorModel) cm).createSubsetColorModel(bands);
    } else if (cm instanceof ScaledColorModel) {
        subset = ((ScaledColorModel) cm).createSubsetColorModel(bands);
    } else if (bands.length == 1 && cm instanceof ComponentColorModel) {
        final int dataType = cm.getTransferType();
        if (dataType < DataBuffer.TYPE_BYTE || dataType > DataBuffer.TYPE_USHORT) {
            return Colorizer.NULL_COLOR_MODEL;
        }
        final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        subset = new ComponentColorModel(cs, false, true, Transparency.OPAQUE, dataType);
    } else {
        // TODO: handle other color models.
        return Colorizer.NULL_COLOR_MODEL;
    }
    return unique(subset);
}