update dox to account for different behavior between AVOID and TARGET modes

        final int nativeInt;

    }

    /**

     * This xfermode will draw the src everywhere except on top of the opColor

     * or, depending on the Mode, draw only on top of the opColor.

    /** This xfermode draws, or doesn't draw, based on the destination's

     * distance from an op-color.

     *

     * There are two modes, and each mode interprets a tolerance value.

     *

     * AVOID: In this mode, drawing is allowed only on destination pixels that

     * are different from the op-color.

     *   Tolerance near 0: avoid anything close to the op-color

     *   Tolerance near 255: avoid only colors very close to the op-color

     *

     * @param opColor The color to avoid (or to target depending on Mode). Note

     *                that the alpha in opColor is ignored.

     * @param tolerance How closely we compare a pixel to the opColor.

     *                  0 - only operate if exact match

     *                  255 - maximum gradation (blending) based on how

     *                  similar the pixel is to our opColor (max tolerance)

     * @param mode If we should avoid or target the opColor

     * TARGET: In this mode, drawing only occurs on destination pixels that

     * are similar to the op-color

     *   Tolerance near 0: draw on colors that are very close to op-color

     *   Tolerance near 255: draw on colors that  to the op-color

     */

    public AvoidXfermode(int opColor, int tolerance, Mode mode) {

        if (tolerance < 0 || tolerance > 255) {