Package org.apache.pdfbox.pdmodel.graphics.shading

Class TriangleBasedShadingContext

  • All Implemented Interfaces:
    java.awt.PaintContext
    Direct Known Subclasses:
    GouraudShadingContext, PatchMeshesShadingContext
    abstract class TriangleBasedShadingContext
extends ShadingContext
    Intermediate class extended by the shading types 4,5,6 and 7 that contains the common methods used by these classes.

    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      private void addLinePoints​(Line line, int[][] array)  
      private void addValueToArray​(java.awt.Point p, int value, int[][] array)  
      (package private) abstract java.util.Map<java.awt.Point,​java.lang.Integer> calcPixelTable​(java.awt.Rectangle deviceBounds)
      Deprecated.
      the map was replaced with an array due to a better performance
      protected int[][] calcPixelTable​(java.util.List<ShadedTriangle> triangleList, int[][] array, java.awt.Rectangle deviceBounds)
      Get the points from the triangles, calculate their color and add point-color mappings.
      protected void calcPixelTable​(java.util.List<ShadedTriangle> triangleList, java.util.Map<java.awt.Point,​java.lang.Integer> map, java.awt.Rectangle deviceBounds)
      Deprecated.
      the map was replaced with an array due to a better performance
      (package private) abstract int[][] calcPixelTableArray​(java.awt.Rectangle deviceBounds)
      Calculate every point and its color and store them in a two-dimensional array.
      protected void createPixelTable​(java.awt.Rectangle deviceBounds)
      Creates the pixel table.
      private int evalFunctionAndConvertToRGB​(float[] values)
      Convert color to RGB color value, using function if required, then convert from the shading color space to an RGB value, which is encoded into an integer.
      java.awt.image.Raster getRaster​(int x, int y, int w, int h)  
      private int getValueFromArray​(int x, int y)  
      (package private) abstract boolean isDataEmpty()
      Returns true if the shading has an empty data stream.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • pixelTableArray

        private int[][] pixelTableArray

      • xOffset

        private int xOffset

      • yOffset

        private int yOffset

    • Constructor Detail

      • TriangleBasedShadingContext

        TriangleBasedShadingContext​(PDShading shading,
                            java.awt.image.ColorModel cm,
                            java.awt.geom.AffineTransform xform,
                            Matrix matrix)
                     throws java.io.IOException
        Constructor.
        Parameters:
        shading - the shading type to be used
        cm - the color model to be used
        xform - transformation for user to device space
        matrix - the pattern matrix concatenated with that of the parent content stream
        Throws:
        java.io.IOException - if there is an error getting the color space or doing background color conversion.

    • Method Detail

      • createPixelTable

        protected final void createPixelTable​(java.awt.Rectangle deviceBounds)
                               throws java.io.IOException
        Creates the pixel table.
        Throws:
        java.io.IOException

      • calcPixelTable

        @Deprecated
abstract java.util.Map<java.awt.Point,​java.lang.Integer> calcPixelTable​(java.awt.Rectangle deviceBounds)
                                                                       throws java.io.IOException
        Deprecated.
        the map was replaced with an array due to a better performance
        Calculate every point and its color and store them in a Hash table.
        Returns:
        a Hash table which contains all the points' positions and colors of one image
        Throws:
        java.io.IOException

      • calcPixelTableArray

        abstract int[][] calcPixelTableArray​(java.awt.Rectangle deviceBounds)
                              throws java.io.IOException
        Calculate every point and its color and store them in a two-dimensional array.
        Returns:
        an array which contains all the points' positions and colors of one image
        Throws:
        java.io.IOException

      • calcPixelTable

        @Deprecated
protected void calcPixelTable​(java.util.List<ShadedTriangle> triangleList,
                              java.util.Map<java.awt.Point,​java.lang.Integer> map,
                              java.awt.Rectangle deviceBounds)
                       throws java.io.IOException
        Deprecated.
        the map was replaced with an array due to a better performance
        Get the points from the triangles, calculate their color and add point-color mappings.
        Throws:
        java.io.IOException

      • calcPixelTable

        protected int[][] calcPixelTable​(java.util.List<ShadedTriangle> triangleList,
                                 int[][] array,
                                 java.awt.Rectangle deviceBounds)
                          throws java.io.IOException
        Get the points from the triangles, calculate their color and add point-color mappings.
        Throws:
        java.io.IOException

      • addLinePoints

        private void addLinePoints​(Line line,
                           int[][] array)
                    throws java.io.IOException
        Throws:
        java.io.IOException

      • addValueToArray

        private void addValueToArray​(java.awt.Point p,
                             int value,
                             int[][] array)

      • getValueFromArray

        private int getValueFromArray​(int x,
                              int y)

      • evalFunctionAndConvertToRGB

        private int evalFunctionAndConvertToRGB​(float[] values)
                                 throws java.io.IOException
        Convert color to RGB color value, using function if required, then convert from the shading color space to an RGB value, which is encoded into an integer.
        Throws:
        java.io.IOException

      • isDataEmpty

        abstract boolean isDataEmpty()
        Returns true if the shading has an empty data stream.

      • getRaster

        public final java.awt.image.Raster getRaster​(int x,
                                             int y,
                                             int w,
                                             int h)