javax.media.jai.operator
Class ShearDescriptor

java.lang.Object
  |
  +--javax.media.jai.OperationDescriptorImpl
        |
        +--javax.media.jai.operator.ShearDescriptor

All Implemented Interfaces:

OperationDescriptor, RegistryElementDescriptor, Serializable

public class ShearDescriptor

extends OperationDescriptorImpl

An OperationDescriptor describing the "Shear" operation.

The "Shear" operation shears an image either horizontally or vertically. For each pixel (x, y) of the destination, the source value at the fractional subpixel position (x', y') is constructed by means of an Interpolation object and written to the destination.

If the "shearDir" parameter is equal to SHEAR_HORIZONTAL then x' = (x - xTrans - y*shear) and y' = y. If the "shearDir" parameter is equal to SHEAR_VERTICAL then x' = x and y' = (y - yTrans - x*shear).

It may be noted that the minX, minY, width and height hints as specified through the JAI.KEY_IMAGE_LAYOUT hint in the RenderingHints object are not honored, as this operator calculates the destination image bounds itself. The other ImageLayout hints, like tileWidth and tileHeight, however are honored.

"Shear" defines a PropertyGenerator that performs an identical transformation on the "ROI" property of the source image, which can be retrieved by calling the getProperty method with "ROI" as the property name.

Resource List

Name	Value
GlobalName	shear
LocalName	shear
Vendor	com.sun.media.jai
Description	Shears an image.
DocURL	http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/ShearDescriptor.html
Version	1.0
arg0Desc	The shear value.
arg1Desc	The shear direction.
arg2Desc	The X translation.
arg3Desc	The Y translation.
arg4Desc	The interpolation method for resampling.

Parameter List

Name	Class Type	Default Value
shear	java.lang.Float	NO_PARAMETER_DEFAULT
shearDir	javax.media.jai.operator.ShearDir	NO_PARAMETER_DEFAULT
xTrans	java.lang.Float	0.0F
yTrans	java.lang.Float	0.0F
interpolation	javax.media.jai.Interpolation	InterpolationNearest

See Also:

Interpolation, OperationDescriptor, ShearDir, Serialized Form

Field Summary

static ShearDir	SHEAR_HORIZONTAL
static ShearDir	SHEAR_VERTICAL

Fields inherited from class javax.media.jai.OperationDescriptorImpl

resources, sourceNames, supportedModes

Constructor Summary

ShearDescriptor()
Constructor.

Method Summary

PropertyGenerator[]

getPropertyGenerators() Returns an array of PropertyGenerators implementing property inheritance for the "Shear" operation.

Methods inherited from class javax.media.jai.OperationDescriptorImpl

arePropertiesSupported, getDefaultSourceClass, getDestClass, getDestClass, getInvalidRegion, getName, getNumParameters, getNumSources, getParamClasses, getParamDefaults, getParamDefaultValue, getParameterListDescriptor, getParamMaxValue, getParamMinValue, getParamNames, getPropertyGenerators, getRenderableDestClass, getRenderableSourceClasses, getResourceBundle, getResources, getSourceClasses, getSourceClasses, getSourceNames, getSupportedModes, isImmediate, isModeSupported, isRenderableSupported, isRenderedSupported, makeDefaultSourceClassList, validateArguments, validateArguments, validateParameters, validateParameters, validateRenderableArguments, validateRenderableSources, validateSources, validateSources

Methods inherited from class java.lang.Object

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

Field Detail

SHEAR_HORIZONTAL

public static final ShearDir SHEAR_HORIZONTAL

SHEAR_VERTICAL

public static final ShearDir SHEAR_VERTICAL

Constructor Detail

ShearDescriptor

public ShearDescriptor()

Constructor.

Method Detail

getPropertyGenerators

public PropertyGenerator[] getPropertyGenerators()

Returns an array of PropertyGenerators implementing property inheritance for the "Shear" operation.

Overrides:

getPropertyGenerators in class OperationDescriptorImpl

Returns:

An array of property generators.