c

geotrellis.raster.render

IntCachedColorMap

class IntCachedColorMap extends ColorMap

Caches a color ramp based on a histogram of values. This is an optimization, since often times we create a histogram while classifying, and can reuse that computed information in the color mapping.

In order for this class to work correctly the histogram acts as a map from values to their colors and must contain a value for each pixel value that we expect to encounter.

The performance benefit is eC lookup cost instead of Log provided by IntColorMap

Linear Supertypes
ColorMap, Serializable, Serializable, AnyRef, Any
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Inherited
  1. IntCachedColorMap
  2. ColorMap
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new IntCachedColorMap(colors: Vector[Int], h: histogram.Histogram[Int], options: Options)

    colors

    All color values that can be encountered

    h

    Histogram where counts of values have been replaced cached RGBA color

Value Members

  1. def breaksString: String

    Retrieve a "breaks string" from ColorMap data.

    Retrieve a "breaks string" from ColorMap data. The opposite of the ColorMap.fromString methods.

    Definition Classes
    IntCachedColorMap → ColorMap
  2. val colors: Vector[Int]
    Definition Classes
    IntCachedColorMap → ColorMap
  3. lazy val grey: Boolean
    Definition Classes
    ColorMap
  4. def map(z: Int): Int
    Definition Classes
    IntCachedColorMap → ColorMap
  5. def mapColors(f: (Int) ⇒ Int): ColorMap
    Definition Classes
    IntCachedColorMap → ColorMap
  6. def mapColorsToIndex(): ColorMap

    Maps each color value to its index in the colors sequence.

    Maps each color value to its index in the colors sequence. This is useful for table lookup encodings (ex: geotrellis.raster.render.png.IndexedPngEncoding)

    Definition Classes
    IntCachedColorMap → ColorMap
  7. def mapDouble(z: Double): Int
    Definition Classes
    IntCachedColorMap → ColorMap
  8. val noDataColor: Int
  9. lazy val opaque: Boolean
    Definition Classes
    ColorMap
  10. val options: Options
    Definition Classes
    IntCachedColorMap → ColorMap
  11. def render(tile: Tile): Tile
    Definition Classes
    ColorMap
  12. def withBoundaryType(classBoundaryType: ClassBoundaryType): ColorMap
    Definition Classes
    IntCachedColorMap → ColorMap
  13. def withFallbackColor(color: Int): ColorMap
    Definition Classes
    IntCachedColorMap → ColorMap
  14. def withNoDataColor(color: Int): ColorMap
    Definition Classes
    IntCachedColorMap → ColorMap