Module org.sejda.sambox
Package org.sejda.sambox.pdmodel.graphics.shading

Class PDShadingType5

java.lang.Object
org.sejda.sambox.pdmodel.graphics.shading.PDShading
org.sejda.sambox.pdmodel.graphics.shading.PDShadingType5
All Implemented Interfaces:
COSObjectable
public class PDShadingType5 extends PDShading
Resources for a shading type 5 (Lattice-Form Gouraud-Shade Triangle Mesh).

  • Constructor Details

    • PDShadingType5

      public PDShadingType5(COSDictionary shadingDictionary)
      Constructor using the given shading dictionary.
      Parameters:
      shadingDictionary - the dictionary for this shading

  • Method Details

    • getShadingType

      public int getShadingType()
      Description copied from class: PDShading
      This will return the shading type.
      Specified by:
      getShadingType in class PDShading
      Returns:
      the shading typ

    • getVerticesPerRow

      public int getVerticesPerRow()
      The vertices per row of this shading. This will return -1 if one has not been set.
      Returns:
      the number of vertices per row

    • setVerticesPerRow

      public void setVerticesPerRow(int verticesPerRow)
      Set the number of vertices per row.
      Parameters:
      verticesPerRow - the number of vertices per row

    • toPaint

      public Paint toPaint(Matrix matrix)
      Description copied from class: PDShading
      Returns an AWT paint which corresponds to this shading
      Specified by:
      toPaint in class PDShading
      Parameters:
      matrix - the pattern matrix concatenated with that of the parent content stream, this matrix which maps the pattern's internal coordinate system to user space
      Returns:
      an AWT Paint instance

    • getBitsPerComponent

      public int getBitsPerComponent()
      The bits per component of this shading. This will return -1 if one has not been set.
      Returns:
      the number of bits per component

    • setBitsPerComponent

      public void setBitsPerComponent(int bitsPerComponent)
      Set the number of bits per component.
      Parameters:
      bitsPerComponent - the number of bits per component

    • getBitsPerCoordinate

      public int getBitsPerCoordinate()
      The bits per coordinate of this shading. This will return -1 if one has not been set.
      Returns:
      the number of bits per coordinate

    • setBitsPerCoordinate

      public void setBitsPerCoordinate(int bitsPerCoordinate)
      Set the number of bits per coordinate.
      Parameters:
      bitsPerCoordinate - the number of bits per coordinate

    • getNumberOfColorComponents

      public int getNumberOfColorComponents() throws IOException
      The number of color components of this shading.
      Returns:
      number of color components of this shading
      Throws:
      IOException

    • setDecodeValues

      public void setDecodeValues(COSArray decodeValues)
      This will set the decode values.
      Parameters:
      decodeValues - the new decode values

    • getDecodeForParameter

      public PDRange getDecodeForParameter(int paramNum)
      Get the decode for the input parameter.
      Parameters:
      paramNum - the function parameter number
      Returns:
      the decode parameter range or null if none is set

    • interpolate

      protected float interpolate(float src, long srcMax, float dstMin, float dstMax)
      Calculate the interpolation, see p.345 pdf spec 1.7.
      Parameters:
      src - src value
      srcMax - max src value (2^bits-1)
      dstMin - min dst value
      dstMax - max dst value
      Returns:
      interpolated value

    • readVertex

      protected org.sejda.sambox.pdmodel.graphics.shading.Vertex readVertex(ImageInputStream input, long maxSrcCoord, long maxSrcColor, PDRange rangeX, PDRange rangeY, PDRange[] colRangeTab, Matrix matrix, AffineTransform xform) throws IOException
      Read a vertex from the bit input stream performs interpolations.
      Parameters:
      input - bit input stream
      maxSrcCoord - max value for source coordinate (2^bits-1)
      maxSrcColor - max value for source color (2^bits-1)
      rangeX - dest range for X
      rangeY - dest range for Y
      colRangeTab - dest range array for colors
      matrix - the pattern matrix concatenated with that of the parent content stream
      Returns:
      a new vertex with the flag and the interpolated values
      Throws:
      IOException - if something went wrong

    • getBounds

      public Rectangle2D getBounds(AffineTransform xform, Matrix matrix) throws IOException
      Description copied from class: PDShading
      Calculate a bounding rectangle around the areas of this shading context.
      Overrides:
      getBounds in class PDShading
      Returns:
      Bounding rectangle or null, if not supported by this shading type.
      Throws:
      IOException