The javax.imageio.spi package contains service provider interfaces for reading, writing, and transcoding images, and obtaining image input and output streams, as well as a run-time registry that discovers installed instances of Image I/O service providers and allows new instances to be registered dynamically.
| Class | Description |
|---|---|
| IIORegistry | A registry for Image I/O service provider instances. |
| IIOServiceProvider | A superinterface for functionality common to all Image I/O service provider interfaces (SPIs). |
| ImageInputStreamSpi | The service provider interface (SPI) for ImageInputStreams. |
| ImageOutputStreamSpi | The service provider interface (SPI) for ImageOutputStreams. |
| ImageReaderSpi | The service provider interface (SPI) for ImageReaders. |
| ImageReaderWriterSpi | A superclass containing instance variables and methods common to ImageReaderSpi and ImageWriterSpi. |
| ImageTranscoderSpi | The service provider interface (SPI) for ImageTranscoders. |
| ImageWriterSpi | The service provider interface (SPI) for ImageWriters. |
| RegisterableService | An optional interface that may be provided by service provider objects that will be registered with a ServiceRegistry. |
| ServiceRegistry | A registry for service provider instances for Image I/O service types. |
| ServiceRegistry.Filter | A simple filter interface used by ServiceRegistry.getServiceProviders to select providers matching an arbitrary criterion. |
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/javax/imageio/spi/package-summary.html