AbstractTransformImageOp.java

/*
 * Copyright (c) 2009 Piotr Piastucki
 * 
 * This file is part of Patchca CAPTCHA library.
 * 
 *  Patchca is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  Patchca is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with Patchca. If not, see <http://www.gnu.org/licenses/>.
 */
package com.xiongyingqi.captcha.filter.library;


public abstract class AbstractTransformImageOp extends AbstractImageOp {

    protected abstract void transform(int x, int y, double[] t);

    protected void init() {
    }

    private boolean initialized;

    public AbstractTransformImageOp() {
        setEdgeMode(EDGE_CLAMP);
    }

    @Override
    protected void filter(int[] inPixels, int[] outPixels, int width, int height) {
        if (!initialized) {
            init();
            initialized = true;
        }
        long time1 = System.currentTimeMillis();
        double[] t = new double[2];
        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                transform(x, y, t);
                int pixel = getPixelBilinear(inPixels, t[0], t[1], width, height, getEdgeMode());
                outPixels[x + y * width] = pixel;
            }
        }
        long time2 = System.currentTimeMillis() - time1;
        //System.out.println("AbstractTransformImageOp " + time2);
    }

}