Motorola J2ME Specifications download pdf (Page 44)

ImageUtil Class

ImageUtil provides static methods useful to the manipulation of Image objects.

Specifically, it provides methods for setting and getting RGB values, and also provides the

ability to create a scaled instance of an existing

Image.

ImageUtil Fields

The ImageUtil class defines the following fields:

• public static final int SCALE_AREA - Area scaling method.

• public static final int SCALE_REPLICATE - Replicate scaling method.

• public static final int SCALE_SMOOTH - Smooth scaling method.

ImageUtil Methods

The ImageUtil class defines the following methods:

• public static void getPixels(Image src, int x, int

y, int width, int height, int[] rgbData) throws

ArrayIndexOutOfBoundsException – Gets RGB pixel data from the

specified region of the source image. The data is stored in the provided int array in

row-major order using the standard 24-bit color format (0xRRGGBB). Note that the

color information stored in the image may be subject to the capabilities of the device's

display. The

rgbData must be instantiated previously calling this method, according

to pixel amount that the user is requiring to the method. The parameters are the

following:

src - the source Image to retrieve the pixel data from; x - the horizontal

location of left edge of the region;

y - the vertical location of the top edge of the

region;

width - the width of the region; height - the height of the region; height

- the height of the region; and

rgbData - the array in which the pixel data is to be

stored.

• public static void getPixels(Image src,

int[] rgbData) throws ArrayIndexOutOfBoundsException –

Gets RGB pixel data from the entirety of the source image. The data is stored in the

provided int array in row-major order using the standard 24-bit color format

(0xRRGGBB). Note that the color information stored in the image may be subject to

the capabilities of the device's display. The

rgbData must be instantiated previously

calling this method, according to pixel amount that the user is requiring to the

method. The parameters are the following:

src - the source Image to retrieve the

pixel data from; and

rgbData - the array in which the pixel data is to be stored.

• public static void setPixels(javax.microedition.lcdui.Image dest, int x, int y, int width,

int height, int[] rgbData) throws ArrayIndexOutOfBoundsException,

IllegalArgumentException – Sets RGB pixel data in specified region of the destination

image. The data must be stored in the int array in row-major order using the standard

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Motorola J2ME Specifications Page 44

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