org.apache.fop.render.ps

Class PSImageHandlerRawPNG

java.lang.Object

org.apache.fop.render.ps.PSImageHandlerRawPNG

All Implemented Interfaces:

ImageHandler, ImageHandlerBase, PSImageHandler

public class PSImageHandlerRawPNG
extends Object
implements PSImageHandler

Image handler implementation which handles raw (not decoded) PNG images for PostScript output.

Constructor Summary

Constructors

Constructor and Description
PSImageHandlerRawPNG()

Method Summary

Methods

Modifier and Type	Method and Description
void	generateForm(RenderingContext context, org.apache.xmlgraphics.image.loader.Image image, PSImageFormResource form) Generates a PostScript form for the given Image instance.
int	getPriority() Returns the priority for this image handler.
Class<org.apache.xmlgraphics.image.loader.impl.ImageRawPNG>	getSupportedImageClass() Returns the Class subclass supported by this instance.
org.apache.xmlgraphics.image.loader.ImageFlavor[]	getSupportedImageFlavors() Returns the ImageFlavors supported by this instance
void	handleImage(RenderingContext context, org.apache.xmlgraphics.image.loader.Image image, Rectangle pos) Handles the given Image instance painting it at the indicated position in the output format being generated.
boolean	isCompatible(RenderingContext targetContext, org.apache.xmlgraphics.image.loader.Image image) Indicates whether the image handler is compatible with the indicated target represented by the rendering context object and with the image to be processed.

Methods inherited from class java.lang.Object

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

Constructor Detail

PSImageHandlerRawPNG

public PSImageHandlerRawPNG()

Method Detail

handleImage

public void handleImage(RenderingContext context,
               org.apache.xmlgraphics.image.loader.Image image,
               Rectangle pos)
                 throws IOException

Handles the given Image instance painting it at the indicated position in the output format being generated.

Specified by:

handleImage in interface ImageHandler

Parameters:

context - the rendering context

image - the image to be handled

pos - the position and scaling of the image relative to the origin point of the current viewport (in millipoints)

Throws:

IOException - if an I/O error occurs

generateForm

public void generateForm(RenderingContext context,
                org.apache.xmlgraphics.image.loader.Image image,
                PSImageFormResource form)
                  throws IOException

Generates a PostScript form for the given Image instance.

Specified by:

generateForm in interface PSImageHandler

Parameters:

context - the rendering context

image - the image to be handled

form - the associated form resource

Throws:

IOException - if an I/O error occurs

getPriority

public int getPriority()

Returns the priority for this image handler. A lower value means higher priority. This information is used to build the ordered/prioritized list of supported ImageFlavors. The built-in handlers use priorities between 100 and 999.

Specified by:

getPriority in interface ImageHandlerBase

Returns:

a positive integer (>0) indicating the priority

getSupportedImageClass

public Class<org.apache.xmlgraphics.image.loader.impl.ImageRawPNG> getSupportedImageClass()

Returns the Class subclass supported by this instance.

Specified by:

getSupportedImageClass in interface ImageHandlerBase

Returns:

the image Class type

getSupportedImageFlavors

public org.apache.xmlgraphics.image.loader.ImageFlavor[] getSupportedImageFlavors()

Returns the ImageFlavors supported by this instance

Specified by:

getSupportedImageFlavors in interface ImageHandlerBase

Returns:

the supported image flavors

isCompatible

public boolean isCompatible(RenderingContext targetContext,
                   org.apache.xmlgraphics.image.loader.Image image)

Indicates whether the image handler is compatible with the indicated target represented by the rendering context object and with the image to be processed. The image is also passed as a parameter because a handler might not support every subtype of image that is presented. For example: in the case of ImageXMLDOM, the image might carry an SVG or some other XML format. One handler might only handle SVG but no other XML format.

Specified by:

isCompatible in interface ImageHandler

Parameters:

targetContext - the target rendering context

image - the image to be processed (or null if only to check based on the rendering context)

Returns:

true if this handler is compatible with the target rendering context