Package org.sunflow.image

## Class ColorFactory

- java.lang.Object
- - org.sunflow.image.ColorFactory

-     public final class ColorFactory
      extends java.lang.Object

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class | Description
    --- | --- | ---
    `static class` | `ColorFactory.ColorSpecificationException` |

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `ColorFactory()` |

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static Color` | `createColor​(java.lang.String colorspace, float... data)` | Creates a color value in the renderer's internal color space from a string (representing the color space name) and an array of floating point values.
    `static java.lang.String` | `getInternalColorspace()` | Return the name of the internal color space.
    `static int` | `getRequiredDataValues​(java.lang.String colorspace)` | Checks to see how many values are required to specify a color using the given colorspace.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ColorFactory

          public ColorFactory()

  - ### Method Detail

    - #### getInternalColorspace

          public static java.lang.String getInternalColorspace()

      Return the name of the internal color space. This string can be used interchangeably with `null` in the following methods.
      Returns:
        internal colorspace name

    - #### getRequiredDataValues

          public static int getRequiredDataValues​(java.lang.String colorspace)

      Checks to see how many values are required to specify a color using the given colorspace. This number can be variable for spectrum colors, in which case the returned value is -1. If the colorspace name is invalid, this method returns -2. No exception is thrown. This method is intended for parsers that want to know how many floating values to retrieve from a file.
      Parameters:
        `colorspace` -
      Returns:
        number of floating point numbers expected, -1 for any, -2 on error

    - #### createColor

          public static Color createColor​(java.lang.String colorspace,
                                          float... data)
                                   throws ColorFactory.ColorSpecificationException

      Creates a color value in the renderer's internal color space from a string (representing the color space name) and an array of floating point values. If the colorspace string is null, we assume the data was supplied in internal space. This method does much error checking and may throw a `RuntimeException` if its parameters are not consistent. Here are the currently supported color spaces:
      - `"sRGB nonlinear"` - requires 3 values
      - `"sRGB linear"` - requires 3 values
      - `"XYZ"` - requires 3 values
      - `blackbody` - requires 1 value (temperature in Kelvins)
      - `spectrum [min] [max]` - any number of values (must be >0), [start] and [stop] is the range over which the spectrum is defined in nanometers.
      Parameters:
        `colorspace` - color space name
        `data` - data describing this color
      Returns:
        a valid color in the renderer's color space
      Throws:
        `ColorFactory.ColorSpecificationException`