Examples with WritableRaster java.awt.image.WritableRaster used on opensource projects

Example 96 with WritableRaster

use of java.awt.image.WritableRaster in project processdash by dtuma.

the class TeamMemberTimeCellRenderer method getGradient.

/** Construct a Paint that can be used to fade to the background color.
     */
protected Paint getGradient() {
    Color backgroundColor = getBackground();
    BufferedImage i = new BufferedImage(gradientWidth, 1, BufferedImage.TYPE_INT_ARGB);
    WritableRaster alpha = i.getAlphaRaster();
    for (int x = gradientWidth; x-- > 0; ) {
        i.setRGB(x, 0, backgroundColor.getRGB());
        double sample = gradientWidth - x;
        sample = sample / gradientWidth;
        sample = (1.0 - sample * sample) * 255;
        alpha.setSample(x, 0, 0, sample);
    }
    // to perform a quadratic fade instead of a linear fade.
    return new TexturePaint(i, new Rectangle(leftBorder, 0, gradientWidth, 1));
}