Linux cli command XcupStoreColors

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NAME 🖥️ XcupStoreColors 🖥️

initialize shareable colormap entries at specific locations

SYNOPSIS

cc [ flag ... ] file ... -lXext [ library ... ]
#include <X11/extensions/Xcup.h>
Status XcupStoreColors ( Display *display , Colormap colormap ,
XColor *colors_in_out , int ncolors );

ARGUMENTS

display
Specifies the connection to the X server

colormap
Specifies the colormap

colors_in_out
Specifies and returns the values actually used in the colormap

ncolors
Specifies the number of items in colors_in_out

DESCRIPTION

The * XcupStoreColors * function changes the colormap entries of the pixel values in the pixel members of the XColor structures. The colormap entries are allocated as if an AllocColor has been used instead, i.e. the colors are read-only (shareable). * XcupStoreColors * returns the number of colors that were successfully allocated in the colormap.

A * Value * error is generated if a pixel is not a valid index into the colormap. A * BadMatch * error is generated if the colormap does not belong to a GrayScale, PseudoColor, or DirectColor visual.

Applications which allocate many colors in a screen’s default colormap, e.g. a color-cube or a gray-ramp, should allocate them with * XCupStoreColors *. By using XCupStoreColors the colors will be allocated sharable (read-only) and any other application which allocates the same color will share that color cell.

SEE ALSO

XcupQueryVersion(3Xext), XcupGetReservedColormapEntries(3Xext),
Colormap Utilization Policy and Extension

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