public Class PNGImageWriterSpi

Implements abstract javax.imageio.spi.ImageWriterSpi.canEncodeImage.

Doc from javax.imageio.spi.ImageWriterSpi.canEncodeImage.

Returns true if the ImageWriter implementation associated with this service provider is able to encode an image with the given layout. The layout (i.e., the image's SampleModel and ColorModel) is described by an ImageTypeSpecifier object.

A return value of true is not an absolute guarantee of successful encoding; the encoding process may still produce errors due to factors such as I/O errors, inconsistent or malformed data structures, etc. The intent is that a reasonable inspection of the basic structure of the image be performed in order to determine if it is within the scope of the encoding format. For example, a service provider for a format that can only encode greyscale would return false if handed an RGB BufferedImage. Similarly, a service provider for a format that can encode 8-bit RGB imagery might refuse to encode an image with an associated alpha channel.

Different ImageWriters, and thus service providers, may choose to be more or less strict. For example, they might accept an image with premultiplied alpha even though it will have to be divided out of each pixel, at some loss of precision, in order to be stored.

Annotations

@Override

Implements abstract javax.imageio.spi.ImageWriterSpi.createWriterInstance.

Doc from javax.imageio.spi.ImageWriterSpi.createWriterInstance.

Returns an instance of the ImageWriter implementation associated with this service provider. The returned object will initially be in an initial state as if its reset method had been called.

An Object may be supplied to the plug-in at construction time. The nature of the object is entirely plug-in specific.

Typically, a plug-in will implement this method using code such as return new MyImageWriter(this).

Annotations

@Override

Implements abstract javax.imageio.spi.IIOServiceProvider.getDescription.

Doc from javax.imageio.spi.IIOServiceProvider.getDescription.

Returns a brief, human-readable description of this service provider and its associated implementation. The resulting string should be localized for the supplied Locale, if possible.

Annotations

@Override