Class LayerOpt

java.lang.Object
uk.ac.starlink.ttools.plot2.LayerOpt

@Equality public class LayerOpt extends Object
Defines characteristics of a plot layer that may enable plotting optimisations.
Since:
12 Feb 2013
Author:
Mark Taylor
  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static LayerOpt
    Indicates layer with no known optimisation assumptions.
    static LayerOpt
    Indicates opaque multicoloured layer.
  • Constructor Summary

    Constructors
    Constructor
    Description
    LayerOpt(Color singleColor, boolean opaque)
    Constructs a LayerOpt with explicit options.
  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
     
    Returns a colour if the only painting done by this layer is in a single colour.
    int
     
    boolean
    Indicates whether it's safe to assume that all drawing is opaque.
     

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait
  • Field Details

    • OPAQUE

      public static LayerOpt OPAQUE
      Indicates opaque multicoloured layer.
    • NO_SPECIAL

      public static LayerOpt NO_SPECIAL
      Indicates layer with no known optimisation assumptions.
  • Constructor Details

    • LayerOpt

      public LayerOpt(Color singleColor, boolean opaque)
      Constructs a LayerOpt with explicit options.
      Parameters:
      singleColor - colour if only one is used by the layer, else null
      opaque - true if only opaque pixels are generated by the layer
  • Method Details

    • getSingleColor

      public Color getSingleColor()
      Returns a colour if the only painting done by this layer is in a single colour. Different alphas are permitted, but not different RGB values.
      Returns:
      single colour, or null
    • isOpaque

      public boolean isOpaque()
      Indicates whether it's safe to assume that all drawing is opaque.
      Returns:
      true if no transparency is used
    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object
    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object
    • toString

      public String toString()
      Overrides:
      toString in class Object