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XcupStoreColors

Section: X FUNCTIONS (3)
Updated: libXext 1.3.3
Index Return to Main Contents
 

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


 

Index

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
SEE ALSO


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