Package com.google.gwt.canvas.dom.client

Class ImageData

java.lang.Object

com.google.gwt.core.client.JavaScriptObject

com.google.gwt.canvas.dom.client.ImageData

public class ImageData
extends JavaScriptObject

Object that holds image data and a size.

See Also:

• HTML Canvas 2D ImageData

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ImageData()

Method Summary

Modifier and Type	Method	Description
final int	getAlphaAt(int x, int y)	Returns the alpha value at position (x,y).
final int	getBlueAt(int x, int y)	Returns the blue value at position (x,y).
final CanvasPixelArray	getData()	Returns a canvas pixel array of size width * height * 4.
final int	getGreenAt(int x, int y)	Returns the green value at position (x,y).
final int	getHeight()	Returns the height of this image data object.
final int	getRedAt(int x, int y)	Returns the red value at position (x,y).
final int	getWidth()	Returns the width of this image data object.
final void	setAlphaAt(int alpha, int x, int y)	Sets the alpha value at position (x,y).
final void	setBlueAt(int blue, int x, int y)	Sets the blue value at position (x,y).
final void	setGreenAt(int green, int x, int y)	Sets the green value at position (x,y).
final void	setRedAt(int red, int x, int y)	Sets the red value at position (x,y).

Methods inherited from class com.google.gwt.core.client.JavaScriptObject

cast, createArray, createArray, createFunction, createObject, equals, hashCode, toSource, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ImageData

protected ImageData()

Method Details

getAlphaAt

public final int getAlphaAt(int x,
 int y)

Returns the alpha value at position (x,y).

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

the alpha value at position (x,y), or 0 if not in the image

See Also:

• setAlphaAt(int, int, int)
• getColorAt(int, int, int)

getBlueAt

public final int getBlueAt(int x,
 int y)

Returns the blue value at position (x,y).

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

the blue value at position (x,y), or 0 if not in the image

See Also:

• setBlueAt(int, int, int)
• getColorAt(int, int, int)

getData

public final CanvasPixelArray getData()

Returns a canvas pixel array of size width * height * 4.

Returns:

a CanvasPixelArray object

getGreenAt

public final int getGreenAt(int x,
 int y)

Returns the green value at position (x,y).

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

the green value at position (x,y), or 0 if not in the image

See Also:

• setGreenAt(int, int, int)
• getColorAt(int, int, int)

getHeight

public final int getHeight()

Returns the height of this image data object.

Returns:

the image height as an int

getRedAt

public final int getRedAt(int x,
 int y)

Returns the red value at position (x,y).

Parameters:

x - the x coordinate

y - the y coordinate

Returns:

the red value at position (x,y), or 0 if not in the image

See Also:

• setRedAt(int, int, int)
• getColorAt(int, int, int)

getWidth

public final int getWidth()

Returns the width of this image data object.

Returns:

the image width as an int

setAlphaAt

public final void setAlphaAt(int alpha,
 int x,
 int y)

Sets the alpha value at position (x,y).

Parameters:

alpha - the alpha value

x - the x coordinate

y - the y coordinate

See Also:

• getAlphaAt(int, int)
• getColorAt(int, int, int)

setBlueAt

public final void setBlueAt(int blue,
 int x,
 int y)

Sets the blue value at position (x,y).

Parameters:

blue - the blue value

x - the x coordinate

y - the y coordinate

See Also:

• getBlueAt(int, int)
• getColorAt(int, int, int)

setGreenAt

public final void setGreenAt(int green,
 int x,
 int y)

Sets the green value at position (x,y).

Parameters:

green - the green value

x - the x coordinate

y - the y coordinate

See Also:

• getGreenAt(int, int)
• getColorAt(int, int, int)

setRedAt

public final void setRedAt(int red,
 int x,
 int y)

Sets the red value at position (x,y).

Parameters:

red - the red value

x - the x coordinate

y - the y coordinate

See Also:

• getRedAt(int, int)
• getColorAt(int, int, int)