javax.media.jai.operator
Class WarpDescriptor
java.lang.Object
|
+--javax.media.jai.OperationDescriptorImpl
|
+--javax.media.jai.operator.WarpDescriptor
- All Implemented Interfaces:
- OperationDescriptor, RegistryElementDescriptor, Serializable
- public class WarpDescriptor
- extends OperationDescriptorImpl
An OperationDescriptor describing the "Warp" operation.
The "Warp" operation performs (possibly filtered) general
warping on an image.
The destination bounds may be specified by an ImageLayout
hint provided via a RenderingHints supplied to the operation. If
no bounds are so specified, then the destination bounds will be set to
the minimum bounding rectangle of the forward mapped source bounds
calculated using Warp.mapSourceRect(Rectangle) or, failing that,
Warp.mapSourcePoint(Point2D) applied to the vertices of the
source bounds. If forward mapping by both methods is not viable, then
an approximate affine mapping will be created and used to determine the
destination bounds by forward mapping the source bounds. If this approach
also fails, then the destination bounds will be set to the source bounds.
"Warp" 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.
The parameter, "backgroundValues", is defined to
fill the background with the user-specified background
values. These background values will be translated into background
colors by the ColorModel when the image is displayed.
With the default value, {0.0}, of this parameter,
the background pixels are filled with 0s. If the provided array
length is smaller than the number of bands, the first element of
the provided array is used for all the bands. If the provided values
are out of the data range of the destination image, they will be clamped
into the proper range.
It should be noted that this operation automatically adds a
value of Boolean.TRUE for the
JAI.KEY_REPLACE_INDEX_COLOR_MODEL to the given
configuration so that the operation is performed
on the pixel values instead of being performed on the indices into
the color map if the source(s) have an IndexColorModel.
This addition will take place only if a value for the
JAI.KEY_REPLACE_INDEX_COLOR_MODEL has not already been
provided by the user. Note that the configuration Map
is cloned before the new hint is added to it. The operation can be
smart about the value of the JAI.KEY_REPLACE_INDEX_COLOR_MODEL
RenderingHints, i.e. while the default value for the
JAI.KEY_REPLACE_INDEX_COLOR_MODEL is
Boolean.TRUE, in some cases the operator could set the
default.
Resource List
| Name | Value |
| GlobalName | Warp |
| LocalName | Warp |
| Vendor | com.sun.media.jai |
| Description | Warps an image according
to a specified Warp object. |
| DocURL | http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/operator/WarpDescriptor.html |
| Version | 1.0 |
| arg0Desc | The Warp object. |
| arg1Desc | The interpolation method. |
Parameter List
| Name | Class Type |
Default Value |
| warp | javax.media.jai.Warp |
NO_PARAMETER_DEFAULT |
| interpolation | javax.media.jai.Interpolation |
InterpolationNearest |
| backgroundValues | double[] |
{0.0} |
- See Also:
Interpolation,
Warp,
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, 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 |
WarpDescriptor
public WarpDescriptor()
- Constructor.
getPropertyGenerators
public PropertyGenerator[] getPropertyGenerators()
- Returns an array of
PropertyGenerators implementing
property inheritance for the "Warp" operation.
- Overrides:
getPropertyGenerators in class OperationDescriptorImpl
- Returns:
- An array of property generators.
create
public static RenderedOp create(RenderedImage source0,
Warp warp,
Interpolation interpolation,
double[] backgroundValues,
RenderingHints hints)
- Warps an image according to a specified Warp object.
Creates a ParameterBlockJAI from all
supplied arguments except hints and invokes
JAI.create(String,ParameterBlock,RenderingHints).
- Parameters:
source0 - RenderedImage source 0.warp - The warp object.interpolation - The interpolation method.
May be null.backgroundValues - The user-specified background values.
May be null.hints - The RenderingHints to use.
May be null.- Returns:
- The
RenderedOp destination. - Throws:
IllegalArgumentException - if source0 is null.IllegalArgumentException - if warp is null.- See Also:
JAI,
ParameterBlockJAI,
RenderedOp