com.octo.captcha.component.image.textpaster
Class NonLinearRandomAngleTextPaster

java.lang.Object
  com.octo.captcha.component.image.textpaster.AbstractTextPaster
      com.octo.captcha.component.image.textpaster.NonLinearRandomAngleTextPaster

All Implemented Interfaces:

TextPaster

public class NonLinearRandomAngleTextPaster
extends AbstractTextPaster

A TextPaster that pasts the characters on the background image, turned around a random angle from the center of the character and past at a random y position.

Since:

Nov 11, 2007

Field Summary

Fields inherited from class com.octo.captcha.component.image.textpaster.AbstractTextPaster

myRandom

Constructor Summary

NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength, java.lang.Integer maxAcceptedWordLength, java.awt.Color textColor)

NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength, java.lang.Integer maxAcceptedWordLength, ColorGenerator colorGenerator)

NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength, java.lang.Integer maxAcceptedWordLength, ColorGenerator colorGenerator, java.lang.Boolean manageColorPerGlyph)

Method Summary

void	addRenderingHints(java.awt.RenderingHints.Key key, java.lang.Object value) Adds RenderingHints for the drawing of the characters.
protected double	getRandomAngle() Returns a random angle between 0 and 360 degrees in radians (inclusive).
protected void	pasteCharacter(java.awt.Graphics2D g2d, java.text.AttributedString character) Draws a certain character on the BufferedImage with a random angle and y pos.
java.awt.image.BufferedImage	pasteText(java.awt.image.BufferedImage background, java.text.AttributedString attributedWord) Pastes the attributed string on the backround image and return the final image.

Methods inherited from class com.octo.captcha.component.image.textpaster.AbstractTextPaster

getColorGenerator, getMaxAcceptedWordLenght, getMaxAcceptedWordLength, getMinAcceptedWordLenght, getMinAcceptedWordLength, isManageColorPerGlyph, setColorGenerator

Methods inherited from class java.lang.Object

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

Constructor Detail

NonLinearRandomAngleTextPaster

public NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength,
                                      java.lang.Integer maxAcceptedWordLength,
                                      java.awt.Color textColor)

NonLinearRandomAngleTextPaster

public NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength,
                                      java.lang.Integer maxAcceptedWordLength,
                                      ColorGenerator colorGenerator)

NonLinearRandomAngleTextPaster

public NonLinearRandomAngleTextPaster(java.lang.Integer minAcceptedWordLength,
                                      java.lang.Integer maxAcceptedWordLength,
                                      ColorGenerator colorGenerator,
                                      java.lang.Boolean manageColorPerGlyph)

Method Detail

pasteText

public java.awt.image.BufferedImage pasteText(java.awt.image.BufferedImage background,
                                              java.text.AttributedString attributedWord)
                                       throws CaptchaException

Description copied from interface: TextPaster

Pastes the attributed string on the backround image and return the final image. Implementation must take into account the fact that the text must be readable by human and non by programs

Returns:

the final image

Throws:

CaptchaException - if any exception accurs during paste routine.

See Also:

TextPaster.pasteText(java.awt.image.BufferedImage, java.text.AttributedString)

pasteCharacter

protected void pasteCharacter(java.awt.Graphics2D g2d,
                              java.text.AttributedString character)

Draws a certain character on the BufferedImage with a random angle and y pos. If the characters angle is greater then 90 degrees and lower then 270 degrees, the bottom of the character will be underlined.

Parameters:

g2d - The graphics of the BufferedImage

character - The character to be drawn

getRandomAngle

protected double getRandomAngle()

Returns a random angle between 0 and 360 degrees in radians (inclusive).

Returns:

a random angle between 0 and 360 degrees in radians

addRenderingHints

public void addRenderingHints(java.awt.RenderingHints.Key key,
                              java.lang.Object value)

Adds RenderingHints for the drawing of the characters.

Parameters:

key - The RenderingHints Key

value - The RenderingHints value