ImageData (GWT Javadoc)

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GWT 2.7.0

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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
extends JavaScriptObject

Object that holds image data and a size.

See Also:: HTML Canvas 2D ImageData

Constructor Summary
`protected`	`ImageData()`

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

ImageData

protected ImageData()

Method Detail

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)