edu.duke

Class Pixel

java.lang.Object

edu.duke.Pixel

public class Pixel
extends java.lang.Object

The Pixel class represents a color as its component values of red, green, blue, as well as alpha (for transparency).

Each of the component values of a pixel must have a value between 0 and 255. If a value is given outside that range, it is changed to be within that range. As such, a negative value would be set to 0 and a value greater than 255 would be set to 255.

Example usage:

 ImageResource image = new ImageResource();
 for (Pixel p : image.pixels()) {
     int red = p.getRed();
     int green = p.getGreen();
     int blue = p.getBlue();
     int average = (red + green + blue) / 3;
     p.setRed(average);
     p.setGreen(average);
     p.setBlue(average);
 }
 image.draw();
 

This is open-source software released under the terms of the GPL (http://www.gnu.org/licenses/gpl.html).

Constructor Summary

Constructors

Constructor and Description
Pixel(Pixel other) Creates a new Pixel from with the same values as the other pixel passed as a parameter.

Method Summary

Modifier and Type	Method and Description
int	getAlpha() Returns the value of the pixel's alpha (or transparency) component.
int	getBlue() Returns the value of the pixel's blue component.
int	getGreen() Returns the value of the pixel's green component.
int	getRed() Returns the value of the pixel's red component.
int	getX() Returns the pixel's x-coordinate within the image.
int	getY() Returns the pixel's y-coordinate within the image.
void	setAlpha(int a) Resets the value of the pixel's alpha (or transparency) component to the value passed as a parameter.
void	setBlue(int b) Resets the value of the pixel's blue component to the value passed as a parameter.
void	setGreen(int g) Resets the value of the pixel's green component to the value passed as a parameter.
void	setRed(int r) Resets the value of the pixel's red component to the value passed as a parameter.
java.lang.String	toString() Returns the string representation of the of the pixel.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Pixel

public Pixel(Pixel other)

Creates a new Pixel from with the same values as the other pixel passed as a parameter.

Parameters:

other - another pixel

Method Detail

getX

public int getX()

Returns the pixel's x-coordinate within the image.

Returns:

the x-coordinate of this pixel.

getY

public int getY()

Returns the pixel's y-coordinate within the image.

Returns:

the y-coordinate of this pixel.

getRed

public int getRed()

Returns the value of the pixel's red component.

Returns:

the pixel's red value within the range 0-255

getGreen

public int getGreen()

Returns the value of the pixel's green component.

Returns:

the pixel's green value within the range 0-255

getBlue

public int getBlue()

Returns the value of the pixel's blue component.

Returns:

the pixel's blue value within the range 0-255

getAlpha

public int getAlpha()

Returns the value of the pixel's alpha (or transparency) component.

Returns:

the pixel's alpha value within the range 0-255

setRed

public void setRed(int r)

Resets the value of the pixel's red component to the value passed as a parameter. If it is not in the range of 0-255 it is changed to be in that range.

Parameters:

r - the red value

setGreen

public void setGreen(int g)

Resets the value of the pixel's green component to the value passed as a parameter. If it is not in the range of 0-255 it is changed to be in that range.

Parameters:

g - the green value

setBlue

public void setBlue(int b)

Resets the value of the pixel's blue component to the value passed as a parameter. If it is not in the range of 0-255 it is changed to be in that range.

Parameters:

b - the blue value

setAlpha

public void setAlpha(int a)

Resets the value of the pixel's alpha (or transparency) component to the value passed as a parameter. If it is not in the range of 0-255 it is changed to be in that range.

Parameters:

a - the alpha value

toString

public java.lang.String toString()

Returns the string representation of the of the pixel.

Overrides:

toString in class java.lang.Object

Returns:

a string containing the RGB values