Windows PowerShell command on Get-command XParseColor

Manual Pages for UNIX Operating System command usage for man XParseColor

XLIB FUNCTIONS XQueryColor(3x11)

NAME

XQueryColor, XQueryColors, XLookupColor, XParseColor -

obtain color values SYNTAX

cc [ flag... ] file... -lX11 [ library... ]

int XQueryColor(Display *display, Colormap colormap, XColor

*def_in_out);

int XQueryColors(Display *display, Colormap colormap, XColor

defs_in_out[], int ncolors);

Status XLookupColor(Display *display, Colormap colormap,

char *color_name, XColor *exact_def_return, XColor

*screen_def_return);

Status XParseColor(Display *display, Colormap colormap, char

*spec, XColor *exact_def_return);

ARGUMENTS colormap Specifies the colormap.

color_name

Specifies the color name string (for example, red) whose color definition structure you want returned.

def_in_out

Specifies and returns the RGB values for the pixel specified in the structure.

defs_in_out

Specifies and returns an array of color definition

structures for the pixel specified in the struc-

ture. display Specifies the connection to the X server.

exact_def_return

Returns the exact RGB values. ncolors Specifies the number of XColor structures in the color definition array.

screen_def_return

Returns the closest RGB values provided by the hardware. spec Specifies the color name string; case is ignored.

exact_def_return

X Version 11 Last change: libX11 1.3.5 1 XLIB FUNCTIONS XQueryColor(3x11) Returns the exact color value for later use and sets the DoRed, DoGreen, and DoBlue flags.

DESCRIPTION

The XQueryColor function returns the current RGB value for the pixel in the XColor structure and sets the DoRed, DoGreen, and DoBlue flags. The XQueryColors function

returns the RGB value for each pixel in each XColor struc-

ture and sets the DoRed, DoGreen, and DoBlue flags in each structure.

XQueryColor and XQueryColors can generate BadColor and Bad-

Value errors. The XLookupColor function looks up the string name of a

color with respect to the screen associated with the speci-

fied colormap. It returns both the exact color values and the closest values provided by the screen with respect to the visual type of the specified colormap. If the color name is not in the Host Portable Character Encoding, the

result is implementation-dependent. Use of uppercase or

lowercase does not matter. XLookupColor returns nonzero if the name is resolved; otherwise, it returns zero.

The XParseColor function looks up the string name of a color

with respect to the screen associated with the specified colormap. It returns the exact color value. If the color name is not in the Host Portable Character Encoding, the

result is implementation-dependent. Use of uppercase or

lowercase does not matter. XParseColor returns nonzero if

the name is resolved; otherwise, it returns zero.

XLookupColor and XParseColor can generate BadColor error.

COLOR NAMES

An RGB Device specification is identified by the prefix ``rgb:'' and conforms to the following syntax: rgb:// , , := h | hh | hhh | hhhh h := single hexadecimal digits (case insignificant) Note that h indicates the value scaled in 4 bits, hh the value scaled in 8 bits, hhh the value scaled in 12 bits, and hhhh the value scaled in 16 bits, respectively. For backward compatibility, an older syntax for RGB Device is supported, but its continued use is not encouraged. The syntax is an initial sharp sign character followed by a numeric specification, in one of the following formats: X Version 11 Last change: libX11 1.3.5 2 XLIB FUNCTIONS XQueryColor(3x11)

#RGB (4 bits each)

#RRGGBB (8 bits each)

#RRRGGGBBB (12 bits each)

#RRRRGGGGBBBB (16 bits each)

The R, G, and B represent single hexadecimal digits. When fewer than 16 bits each are specified, they represent the

most significant bits of the value (unlike the ``rgb:'' syn-

tax, in which values are scaled). For example, the string

``#3a7'' is the same as ``#3000a0007000''.

An RGB intensity specification is identified by the prefix ``rgbi:'' and conforms to the following syntax: rgbi://

Note that red, green, and blue are floating-point values

between 0.0 and 1.0, inclusive. The input format for these values is an optional sign, a string of numbers possibly containing a decimal point, and an optional exponent field containing an E or e followed by a possibly signed integer string.

The standard device-independent string specifications have