net.rim.device.api.system
Class PNGEncodedImage

java.lang.Object
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  +--net.rim.device.api.system.EncodedImage
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        +--net.rim.device.api.system.PNGEncodedImage

public final class PNGEncodedImage

extends EncodedImage

Represents an image encoded in the PNG format.

Fields inherited from class net.rim.device.api.system.EncodedImage

DECODE_ALPHA, DECODE_NATIVE, DECODE_READONLY, IMAGE_TYPE_JPEG, IMAGE_TYPE_PNG, IMAGE_TYPE_WBMP

Method Summary

int	getAlphaBitDepth() Queries the bit depth of the alpha channel.
int	getBitDepth() Queries the PNG bit depth.
Bitmap	getBitmap(int frameIndex) Returns a bitmap of the PNG image.
int	getColorType() Queries the PNG color type.
boolean	hasAlpha() Queries whether the PNG has an alpha channel.

Methods inherited from class net.rim.device.api.system.EncodedImage

createEncodedImage, createEncodedImage, getBitmap, getFrameCount, getFrameHeight, getFrameMonochrome, getFrameTransparency, getFrameWidth, getHeight, getImageType, getSupportedMIMETypes, getWidth, hasTransparency, isMonochrome, setDecodeMode, setScale

Methods inherited from class java.lang.Object

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

Method Detail

getColorType

public int getColorType()

Queries the PNG color type.

Returns:

The PNG color type of the image.

getBitDepth

public int getBitDepth()

Queries the PNG bit depth.

Returns:

The PNG bit depth of the image.

hasAlpha

public boolean hasAlpha()

Queries whether the PNG has an alpha channel.

Returns:

True if the PNG has an alpha channel, false otherwise.

getAlphaBitDepth

public int getAlphaBitDepth()

Queries the bit depth of the alpha channel.

Returns:

The bit depth of the alpha channel, 0 if the image does not have an alpha channel.

getBitmap

public Bitmap getBitmap(int frameIndex)

Returns a bitmap of the PNG image. PNG images always contain a single frame.

Overrides:

getBitmap in class EncodedImage

Parameters:

frameIndex - Must be 0.

Returns:

A Bitmap decoded from the PNG data.

Since:

JDE 3.6