Package uk.ac.starlink.ttools.plot

Class BitSetPixellator

java.lang.Object
uk.ac.starlink.ttools.plot.BitSetPixellator
All Implemented Interfaces:
Pixellator
public class BitSetPixellator extends Object implements Pixellator
Pixellator built on a bit vector.
Since:
23 Aug 2007
Author:
Mark Taylor

  • Constructor Details

    • BitSetPixellator

      public BitSetPixellator(Rectangle bounds, BitSet mask)
      Constructor. Point (x,y) of the pixellator is represented by mask index (x-bounds.x) + bounds.width * (y-bounds.y).
      Parameters:
      bounds - bounds of this pixellator
      mask - bit vector with a point set for each filled in pixel

  • Method Details

    • getBounds

      public Rectangle getBounds()
      Description copied from interface: Pixellator
      Returns a copy of the bounding rectangle for this pixellator. All points iterated over by this object will fall within this rectangle. If this object has no points, null may be returned.
      Specified by:
      getBounds in interface Pixellator
      Returns:
      bounds

    • start

      public void start()
      Description copied from interface: Pixellator
      Makes this object ready to iterate. Should be called before any call to Pixellator.next().
      Specified by:
      start in interface Pixellator

    • next

      public boolean next()
      Description copied from interface: Pixellator
      Moves to the next point in the sequence. Must be called before any call to Pixellator.getX()/Pixellator.getY(). Returns value indicates whether there is a next point.
      Specified by:
      next in interface Pixellator
      Returns:
      next true iff there are more points

    • getX

      public int getX()
      Description copied from interface: Pixellator
      Returns the X value for the current point.
      Specified by:
      getX in interface Pixellator
      Returns:
      x

    • getY

      public int getY()
      Description copied from interface: Pixellator
      Returns the Y value for the current point.
      Specified by:
      getY in interface Pixellator
      Returns:
      y

    • copy

      public static BitSetPixellator copy(Pixellator pixer)
      Creates a new pixellator with the same content as an existing one. The bounds of the new one are derived from the actual limits of the pixels in the input, so may differ from those reported by the getBounds method of the input.
      Parameters:
      pixer - pixellator to copy
      Returns:
      clone