net.jot.captcha
Class JOTCaptchaImage

java.lang.Object
  net.jot.image.JOTAbstractImage
      net.jot.captcha.JOTCaptchaImage

public class JOTCaptchaImage
extends JOTAbstractImage

Implements a 'CAPTCHA' image. 'CAPTCHA' gotta be one of the worst acronysm i ever came across ! it stands for "Completely Automated Public Turing test to tell Computers and Humans Apart" Anyway our Captcha here, is the common image with letters/numbers inside which is hard for a computer to parse but easy for a human. This is use mostly to prevent "robotized" use of a form to fill your website with junk/spam.

Author:

thibautc

Field Summary

Fields inherited from class net.jot.image.JOTAbstractImage

ALPHA_SUPPORT_NONE, ALPHA_SUPPORT_SIMPLE_BLEND

Constructor Summary

JOTCaptchaImage(int width, int height)

JOTCaptchaImage(int width, int height, int ALPHA_TYPE)

Method Summary

protected void	drawWavyHorizontalLine(int lineThickness, int x, int x2, int y, JOTAbstractPixel pixel, int wavyness, boolean holes)
void	drawWavyLine(int lineThickness, int x, int y, int x2, int y2, JOTAbstractPixel pixel, boolean holes) Draw a wavy line with given thickness (uses wavyness) If holes is enabled, some blank pixel with be mixed, leaving holes
void	drawWavyLine(int x, int y, int x2, int y2, JOTAbstractPixel pixel, boolean holes) Draw a wavy line with a thickness of 1 pixel (uses wavyness)
protected void	drawWavyVerticalLine(int lineThickness, int x, int y, int y2, JOTAbstractPixel pixel, int wavyness, boolean holes)
int	getWaviness()
void	setWaviness(int waviness)

Methods inherited from class net.jot.image.JOTAbstractImage

drawFilledRectangle, drawHorizontalLine, drawLine, drawRectangle, drawVerticalLine, fillImage, getColorDepth, getData, getHeight, getPixel, getWidth, setPixel, writeToStream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JOTCaptchaImage

public JOTCaptchaImage(int width,
                       int height)

JOTCaptchaImage

public JOTCaptchaImage(int width,
                       int height,
                       int ALPHA_TYPE)

Method Detail

drawWavyLine

public void drawWavyLine(int x,
                         int y,
                         int x2,
                         int y2,
                         JOTAbstractPixel pixel,
                         boolean holes)

Draw a wavy line with a thickness of 1 pixel (uses wavyness)

Parameters:

x -

y -

x2 -

y2 -

pixel -

drawWavyLine

public void drawWavyLine(int lineThickness,
                         int x,
                         int y,
                         int x2,
                         int y2,
                         JOTAbstractPixel pixel,
                         boolean holes)

Draw a wavy line with given thickness (uses wavyness) If holes is enabled, some blank pixel with be mixed, leaving holes

Parameters:

lineThickness -

x -

y -

x2 -

y2 -

pixel -

drawWavyHorizontalLine

protected void drawWavyHorizontalLine(int lineThickness,
                                      int x,
                                      int x2,
                                      int y,
                                      JOTAbstractPixel pixel,
                                      int wavyness,
                                      boolean holes)

drawWavyVerticalLine

protected void drawWavyVerticalLine(int lineThickness,
                                    int x,
                                    int y,
                                    int y2,
                                    JOTAbstractPixel pixel,
                                    int wavyness,
                                    boolean holes)

setWaviness

public void setWaviness(int waviness)

getWaviness

public int getWaviness()