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

Class PdfLatticeFormGouraudShadedTriangleShading

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.PdfLatticeFormGouraudShadedTriangleShading
public class PdfLatticeFormGouraudShadedTriangleShading extends AbstractPdfShadingMesh
The class that extends AbstractPdfShading and AbstractPdfShadingMesh classes and is in charge of Shading Dictionary with lattice-form Gouraud-shaded triangle mesh type.

This type is similar to PdfFreeFormGouraudShadedTriangleShading but instead of using free-form geometry, the vertices are arranged in a pseudorectangular lattice, which is topologically equivalent to a rectangular grid. The vertices are organized into rows, which need not be geometrically linear.

The verticals data in stream is similar to PdfFreeFormGouraudShadedTriangleShading, except there is no edge flag.

  • Constructor Details

    • PdfLatticeFormGouraudShadedTriangleShading

      public PdfLatticeFormGouraudShadedTriangleShading (PdfStream pdfStream)
      Creates the new instance of the class from the existing PdfStream.
      Parameters:
      pdfStream - from which this PdfLatticeFormGouraudShadedTriangleShading will be created

    • PdfLatticeFormGouraudShadedTriangleShading

      public PdfLatticeFormGouraudShadedTriangleShading (PdfColorSpace cs, int bitsPerCoordinate, int bitsPerComponent, int verticesPerRow, 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
      verticesPerRow - the number of vertices in each row of the lattice (shall be > 1). The number of rows need not be specified
      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

    • PdfLatticeFormGouraudShadedTriangleShading

      public PdfLatticeFormGouraudShadedTriangleShading (PdfColorSpace cs, int bitsPerCoordinate, int bitsPerComponent, int verticesPerRow, 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
      verticesPerRow - the number of vertices in each row of the lattice (shall be > 1). The number of rows need not be specified
      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

  • Method Details

    • getVerticesPerRow

      public int getVerticesPerRow()
      Gets the number of vertices in each row of the lattice.
      Returns:
      the number of vertices. Can only be greater than 1

    • setVerticesPerRow

      public final void setVerticesPerRow (int verticesPerRow)
      Sets the number of vertices in each row of the lattice. The number of rows need not be specified.
      Parameters:
      verticesPerRow - the number of vertices to be set. Shall be greater than 1