XcmsStoreColor(3X11)X Version 11 (Release 6.6XcmsStoreColor(3X11)
NAME
XcmsStoreColor, XcmsStoreColors - set colors
SYNTAX
Status XcmsStoreColor(display, colormap, color)
Display *display;
Colormap colormap;
XcmsColor *color;
Status XcmsStoreColors(display, colormap, colors, ncolors,
compression_flags_return)
Display *display;
Colormap colormap;
XcmsColor colors[];
int ncolors;
Bool compression_flags_return[];
ARGUMENTS
display Specifies the connection to the X server.
color Specifies the color cell and the color to store.
Values specified in this XcmsColor structure
remain unchanged on return.
colors Specifies the color specification array of
XcmsColor structures, each specifying a color cell
and the color to store in that cell. Values
specified in the array remain unchanged upon
return.
colormap Specifies the colormap.
compression_flags_return
Returns an array of Boolean values indicating
compression status. If a non-NULL pointer is
supplied, each element of the array is set to True
if the corresponding color was compressed and
False otherwise. Pass NULL if the compression
status is not useful.
ncolors Specifies the number of XcmsColor structures in
the color-specification array.
DESCRIPTION
The XcmsStoreColor function converts the color specified in
the XcmsColor structure into RGB values. It then uses this
RGB specification in an XColor structure, whose three flags
(DoRed, DoGreen, and DoBlue) are set, in a call to
XStoreColor to change the color cell specified by the pixel
member of the XcmsColor structure. This pixel value must be
a valid index for the specified colormap, and the color cell
specified by the pixel value must be a read/write cell. If
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the pixel value is not a valid index, a BadValue error
results. If the color cell is unallocated or is allocated
read-only, a BadAccess error results. If the colormap is an
installed map for its screen, the changes are visible
immediately.
Note that XStoreColor has no return value; therefore, an
XcmsSuccess return value from this function indicates that
the conversion to RGB succeeded and the call to XStoreColor
was made. To obtain the actual color stored, use
XcmsQueryColor. Because of the screen's hardware
limitations or gamut compression, the color stored in the
colormap may not be identical to the color specified.
XcmsStoreColor can generate BadAccess, BadColor, and
BadValue errors.
The XcmsStoreColors function converts the colors specified
in the array of XcmsColor structures into RGB values and
then uses these RGB specifications in XColor structures,
whose three flags (DoRed, DoGreen, and DoBlue) are set, in a
call to XStoreColors to change the color cells specified by
the pixel member of the corresponding XcmsColor structure.
Each pixel value must be a valid index for the specified
colormap, and the color cell specified by each pixel value
must be a read/write cell. If a pixel value is not a valid
index, a BadValue error results. If a color cell is
unallocated or is allocated read-only, a BadAccess error
results. If more than one pixel is in error, the one that
gets reported is arbitrary. If the colormap is an installed
map for its screen, the changes are visible immediately.
Note that XStoreColors has no return value; therefore, an
XcmsSuccess return value from this function indicates that
conversions to RGB succeeded and the call to XStoreColors
was made. To obtain the actual colors stored, use
XcmsQueryColors. Because of the screen's hardware
limitations or gamut compression, the colors stored in the
colormap may not be identical to the colors specified.
XcmsStoreColors can generate BadAccess, BadColor, and
BadValue errors.
DIAGNOSTICS
BadAccess A client attempted to free a color map entry that
it did not already allocate.
BadAccess A client attempted to store into a read-only color
map entry.
BadColor A value for a Colormap argument does not name a
defined Colormap.
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BadValue Some numeric value falls outside the range of
values accepted by the request. Unless a specific
range is specified for an argument, the full range
defined by the argument's type is accepted. Any
argument defined as a set of alternatives can
generate this error.
SEE ALSO
XcmsAllocColor(3X11), XcmsQueryColor(3X11)
Xlib - C Language X Interface
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