com.itextpdf.kernel.pdf.colorspace.shading

Class PdfFreeFormGouraudShadedTriangleShading

java.lang.Object

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

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

com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShadingMesh

com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShadingMeshWithFlags

com.itextpdf.kernel.pdf.colorspace.shading.PdfFreeFormGouraudShadedTriangleShading

public class PdfFreeFormGouraudShadedTriangleShading
extends AbstractPdfShadingMeshWithFlags

The class that extends AbstractPdfShading, AbstractPdfShadingMesh and AbstractPdfShadingMeshWithFlags classes and is in charge of Shading Dictionary with free-form Gouraud-shaded triangle mesh type.

The area to be shaded is defined by a path composed entirely of triangles. The colour at each vertex of the triangles is specified, and a technique known as Gouraud interpolation is used to colour the interiors.

The object shall be represented as stream containing a sequence of vertex data. Each vertex is specified by the following values, in the order shown: f x y c1 ... cn where: f - the vertex's edge flag, that determines the vertex is connected to other vertices of the triangle mesh. For full description, see ISO-320001 Paragraph 8.7.4.5.5 x, y - vertex's horizontal and vertical coordinates, expressed in the shading's target coordinate space. c1...cn - vertex's colour components.

If the shading dictionary includes a Function entry, only a single parametric value, t, shall be specified for each vertex in place of the colour components c1...cn.

Constructor Summary

Constructors

Constructor and Description
PdfFreeFormGouraudShadedTriangleShading(PdfColorSpace cs, int bitsPerCoordinate, int bitsPerComponent, int bitsPerFlag, float[] decode) Creates the new instance of the class.
PdfFreeFormGouraudShadedTriangleShading(PdfColorSpace cs, int bitsPerCoordinate, int bitsPerComponent, int bitsPerFlag, PdfArray decode) Creates the new instance of the class.
PdfFreeFormGouraudShadedTriangleShading(PdfStream pdfStream) Creates the new instance of the class from the existing PdfStream.

Method Summary

Methods inherited from class com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShadingMeshWithFlags

getBitsPerFlag, setBitsPerFlag

Methods inherited from class com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShadingMesh

getBitsPerComponent, getBitsPerCoordinate, getDecode, setBitsPerComponent, setBitsPerCoordinate, setDecode, setDecode

Methods inherited from class com.itextpdf.kernel.pdf.colorspace.shading.AbstractPdfShading

flush, getColorSpace, getFunction, getShadingType, isWrappedObjectMustBeIndirect, makeShading, setFunction, setFunction

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

PdfFreeFormGouraudShadedTriangleShading

public PdfFreeFormGouraudShadedTriangleShading(PdfStream pdfStream)

Creates the new instance of the class from the existing PdfStream.

Parameters:

pdfStream - from which this PdfFreeFormGouraudShadedTriangleShading will be created

PdfFreeFormGouraudShadedTriangleShading

public PdfFreeFormGouraudShadedTriangleShading(PdfColorSpace cs,
                                               int bitsPerCoordinate,
                                               int bitsPerComponent,
                                               int bitsPerFlag,
                                               float[] decode)

Creates the new instance of the class.

Parameters:

cs - the PdfColorSpace object in which colour values shall be expressed. The special Pattern space isn't excepted.

bitsPerCoordinate - the number of bits used to represent each vertex coordinate. The value shall be 1, 2, 4, 8, 12, 16, 24, or 32

bitsPerComponent - the number of bits used to represent each colour component. The value shall be 1, 2, 4, 8, 12, or 16

bitsPerFlag - the number of bits used to represent the edge flag for each vertex. The value of BitsPerFlag shall be 2, 4, or 8, but only the least significant 2 bits in each flag value shall be used. The value for the edge flag shall be 0, 1, or 2

decode - the int[] of numbers specifying how to map vertex coordinates and colour components into the appropriate ranges of values. The ranges shall be specified as follows: [x_min x_max y_min y_max c1_min c1_max … cn_min cn_max]. Only one pair of color values shall be specified if a Function entry is present

PdfFreeFormGouraudShadedTriangleShading

public PdfFreeFormGouraudShadedTriangleShading(PdfColorSpace cs,
                                               int bitsPerCoordinate,
                                               int bitsPerComponent,
                                               int bitsPerFlag,
                                               PdfArray decode)

Creates the new instance of the class.

Parameters:

cs - the PdfColorSpace object in which colour values shall be expressed. The special Pattern space isn't excepted

bitsPerCoordinate - the number of bits used to represent each vertex coordinate. The value shall be 1, 2, 4, 8, 12, 16, 24, or 32

bitsPerComponent - the number of bits used to represent each colour component. The value shall be 1, 2, 4, 8, 12, or 16

bitsPerFlag - the number of bits used to represent the edge flag for each vertex. The value of BitsPerFlag shall be 2, 4, or 8, but only the least significant 2 bits in each flag value shall be used. The value for the edge flag shall be 0, 1, or 2

decode - the PdfArray of numbers specifying how to map vertex coordinates and colour components into the appropriate ranges of values. The ranges shall be specified as follows: [x_min x_max y_min y_max c1_min c1_max … cn_min cn_max]. Only one pair of color values shall be specified if a Function entry is present