Package com.itextpdf.kernel.pdf.colorspace.shading

Class AbstractPdfShading

java.lang.Object

com.itextpdf.kernel.pdf.PdfObjectWrapper<PdfDictionary>

com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShading

Direct Known Subclasses:

AbstractPdfShadingBlend, AbstractPdfShadingMesh, PdfFunctionBasedShading

public abstract class AbstractPdfShading
extends PdfObjectWrapper<PdfDictionary>

The PdfShading class that represents the Shading Dictionary PDF object.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractPdfShading(PdfDictionary pdfObject)	Creates the AbstractPdfShading object from the existing PdfDictionary.
protected	AbstractPdfShading(PdfDictionary pdfObject, int type, PdfColorSpace colorSpace)	Creates the AbstractPdfShading object from the existing PdfDictionary, using provided type and colorspace.

Method Summary

Modifier and Type	Method	Description
void	flush()	To manually flush a PdfObject behind this wrapper, you have to ensure that this object is added to the document, i.e.
PdfObject	getColorSpace()	Gets the color space in which colour values shall be expressed.
PdfObject	getFunction()	Gets the function PdfObject that represents color transitions across the shading geometry.
int	getShadingType()	Gets the shading type.
protected boolean	isWrappedObjectMustBeIndirect()	Defines if the object behind this wrapper must be an indirect object in the resultant document.
static AbstractPdfShading	makeShading(PdfDictionary shadingDictionary)	Creates the AbstractPdfShading object from the existing PdfDictionary with corresponding type.
void	setFunction(IPdfFunction function)	Sets the function that represents color transitions across the shading geometry as one object.
void	setFunction(IPdfFunction[] functions)	Sets the function object that represents color transitions across the shading geometry as an array of functions.

Methods inherited from class com.itextpdf.kernel.pdf.PdfObjectWrapper

ensureObjectIsAddedToDocument, ensureUnderlyingObjectHasIndirectReference, getPdfObject, isFlushed, makeIndirect, makeIndirect, markObjectAsIndirect, setForbidRelease, setModified, setPdfObject, unsetForbidRelease

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractPdfShading

protected AbstractPdfShading(PdfDictionary pdfObject)

Creates the AbstractPdfShading object from the existing PdfDictionary.

Parameters:

pdfObject - PdfDictionary from which the AbstractPdfShading object will be created

AbstractPdfShading

protected AbstractPdfShading(PdfDictionary pdfObject,
                             int type,
                             PdfColorSpace colorSpace)

Creates the AbstractPdfShading object from the existing PdfDictionary, using provided type and colorspace.

Parameters:

pdfObject - PdfDictionary from which the AbstractPdfShading object will be created

type - type with which this AbstractPdfShading object will be created

colorSpace - PdfColorSpace with which this AbstractPdfShading object will be created

Method Detail

makeShading

public static AbstractPdfShading makeShading(PdfDictionary shadingDictionary)

Creates the AbstractPdfShading object from the existing PdfDictionary with corresponding type.

Parameters:

shadingDictionary - PdfDictionary from which the AbstractPdfShading object will be created

Returns:

Created AbstractPdfShading object

getShadingType

public int getShadingType()

Gets the shading type.

Returns:

int value of PdfName.ShadingType

getColorSpace

public PdfObject getColorSpace()

Gets the color space in which colour values shall be expressed.

Returns:

PdfObject Color space

getFunction

public PdfObject getFunction()

Gets the function PdfObject that represents color transitions across the shading geometry.

Returns:

PdfObject Function

setFunction

public final void setFunction(IPdfFunction function)

Sets the function that represents color transitions across the shading geometry as one object.

Parameters:

function - The IPdfFunction to set

setFunction

public final void setFunction(IPdfFunction[] functions)

Sets the function object that represents color transitions across the shading geometry as an array of functions.

Parameters:

functions - The array of IPdfFunction to be set

flush

public final void flush()

To manually flush a PdfObject behind this wrapper, you have to ensure that this object is added to the document, i.e. it has an indirect reference. Basically this means that before flushing you need to explicitly call PdfObjectWrapper.makeIndirect(PdfDocument). For example: wrapperInstance.makeIndirect(document).flush(); Note that not every wrapper require this, only those that have such warning in documentation.

Overrides:

flush in class PdfObjectWrapper<PdfDictionary>

isWrappedObjectMustBeIndirect

protected boolean isWrappedObjectMustBeIndirect()

Defines if the object behind this wrapper must be an indirect object in the resultant document.

If this method returns true it doesn't necessarily mean that object must be in the indirect state at any moment, but rather defines that when the object will be written to the document it will be transformed into indirect object if it's not indirect yet.

Return value of this method shouldn't depend on any logic, it should return always true or false.

Specified by:

isWrappedObjectMustBeIndirect in class PdfObjectWrapper<PdfDictionary>

Returns:

true if in the resultant document the object behind the wrapper must be indirect, otherwise false.