IndexedColorSpace Class

class IndexedColorSpace : ColorSpace

Namespace:com::datalogics::PDFL

Inherits from:: ColorSpace

Detailed Description

Indexed color spaces are used to reduce the amount of memory used for processing images. Indexed color spaces are used when a limited number of colors are needed.

Commonly, an image with an indexed color space can be one third the size of the same image with a standard color space, because the indexed image uses a smaller palette of colors.

Uses types

ColorSpace PDFObject

Constructor & Destructor Documentation

IndexedColorSpace(ColorSpace base, int hival, java.util.List< Integer > lookup)

Parameters

base: ColorSpace: The base color space in which the values in the color table are to be interpreted. It can be any device or CIE-based color space or (in PDF 1.3) a Separation or DeviceN space, but not a Pattern space or another Indexed space.
hival: int: an integer that specifies the maximum valid index value. In other words, the color table is to be indexed by integers in the range 0 to hival. hival can be no greater than 255.
lookup: java.util.List< Integer >: a list of integers in the range 0..255. There must be m * (hival + 1) values, where m is the number of components of the base color space.

Create a Indexed color space.

Field Documentation

static DEVICE_CMYK

The DeviceCMYK color space, representing cyan, magenta, yellow, and black components.

static DEVICE_GRAY

The DeviceGray color space, representing a single grayscale component.

static DEVICE_RGB

The DeviceRGB color space, representing red, green, and blue components.

static DEVICE_RGBA

The DeviceRGBA color space, representing red, green, blue, and alpha components.

static LAB

The CIE-based L*a*b* color space.

static LAB_A

The CIE-based L*a*b* color space with an alpha component.

Member Function Documentation

synchronized void delete(Boolean disposing)

Parameters

disposing: Boolean

Returns:

synchronized void

synchronized void delete()

Returns:

synchronized void

boolean equals(Object rhs)

Parameters

rhs: Object

Returns:

boolean

void finalize()

Returns:

void

ColorSpace getBase()

Returns:

ColorSpace

The base color space in which the values in the color table are to be interpreted. It can be any device or CIE-based color space or (in PDF 1.3) a Separation or DeviceN space, but not a Pattern space or another Indexed space.

int getHiVal()

Returns:

int

an integer that specifies the maximum valid index value. In other words, the color table is to be indexed by integers in the range 0 to hival. hival can be no greater than 255.

java.util.List< Integer > getLookup()

Returns:

java.util.List< Integer >

A list of integers in the range 0..255. There must be m * (hival + 1) values, where m is the number of components of the base color space.

String getName()

Returns:

String

The name of the color space. A named color space may be named something like DeviceRGB. More complicated color spaces may have a name like Indexed or ICCBased.

int getNumComponents()

Returns:

int

The number of color components.

The number of components in the color space. For example, DeviceGray has 1 component, DeviceRGB has 3, and DeviceCMYK has 4.

PDFObject getPDFObject()

Returns:

PDFObject

The PDFObject associated with the color space.

Get the PDFObject associated with the color space. This may be a PDFName, PDFDict, PDFStream, or PDFArray.

String toString()

Returns:

String

A string describing this ColorSpace.

Convert a ColorSpace to a string representation.