javax.media.jai.operator
Class DivideIntoConstDescriptor
java.lang.Object
|
+--javax.media.jai.OperationDescriptorImpl
|
+--javax.media.jai.operator.DivideIntoConstDescriptor
- All Implemented Interfaces:
- OperationDescriptor, RegistryElementDescriptor, Serializable
- public class DivideIntoConstDescriptor
- extends OperationDescriptorImpl
An OperationDescriptor describing the
"DivideIntoConst" operation.
The DivideIntoConst operation takes one rendered or renderable
image and an array of double constants, and divides every pixel of
the same band of the source into the constant from the
corresponding array entry. If the number of constants supplied is
less than the number of bands of the destination, then the constant
from entry 0 is applied to all the bands. Otherwise, a constant
from a different entry is applied to each band.
In case of division by 0, if the numerator is 0, then the result
is set to 0; otherwise, the result is set to the maximum value
supported by the destination data type.
By default, the destination image bound, data type, and number of
bands are the same as the source image. If the result of the operation
underflows/overflows the minimum/maximum value supported by the
destination data type, then it will be clamped to the minimum/maximum
value respectively.
The destination pixel values are defined by the pseudocode:
if (constants.length < dstNumBands) {
dst[x][y][b] = constants[0]/src[x][y][b];
} else {
dst[x][y][b] = constants[b]/src[x][y][b];
}
Resource List
| Name | Value |
|---|
| GlobalName | DivideIntoConst |
| LocalName | DivideIntoConst |
| Vendor | com.sun.media.jai |
| Description | Divides a rendered image into
constants. |
| DocURL | http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/DivideIntoConstDescriptor.html |
| Version | 1.0 |
| arg0Desc | The constants to be divided into. |
Parameter List
| Name | Class Type |
Default Value |
|---|
| constants | double[] |
NO_PARAMETER_DEFAULT |
- See Also:
OperationDescriptor, Serialized Form
| Methods inherited from class javax.media.jai.OperationDescriptorImpl |
arePropertiesSupported,
getDefaultSourceClass,
getDestClass,
getDestClass,
getInvalidRegion,
getName,
getNumParameters,
getNumSources,
getParamClasses,
getParamDefaults,
getParamDefaultValue,
getParameterListDescriptor,
getParamMaxValue,
getParamMinValue,
getParamNames,
getPropertyGenerators,
getPropertyGenerators,
getRenderableDestClass,
getRenderableSourceClasses,
getResourceBundle,
getResources,
getSourceClasses,
getSourceClasses,
getSourceNames,
getSupportedModes,
isImmediate,
isModeSupported,
isRenderedSupported,
makeDefaultSourceClassList,
validateArguments,
validateArguments,
validateParameters,
validateRenderableArguments,
validateRenderableSources,
validateSources,
validateSources |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
DivideIntoConstDescriptor
public DivideIntoConstDescriptor()
- Constructor.
isRenderableSupported
public boolean isRenderableSupported()
- Returns
true since renderable operation is supported.
- Overrides:
- isRenderableSupported in class OperationDescriptorImpl
- Tags copied from class: OperationDescriptorImpl
- See Also:
OperationDescriptorImpl.isModeSupported(java.lang.String)
validateParameters
protected boolean validateParameters(ParameterBlock args,
StringBuffer message)
- Validates the input parameters.
In addition to the standard checks performed by the
superclass method, this method checks that the length of the
"constants" array is at least 1.
- Overrides:
- validateParameters in class OperationDescriptorImpl
- Tags copied from class: OperationDescriptorImpl
- Throws:
- IllegalArgumentException - if
args is null.- IllegalArgumentException - if
msg is null
and the validation fails. - See Also:
OperationDescriptorImpl.validateParameters(java.lang.String, java.awt.image.renderable.ParameterBlock, java.lang.StringBuffer)