XStoreColors(3X11) X Version 11 (Release 6.6) XStoreColors(3X11)
NAME
XStoreColors, XStoreColor, XStoreNamedColor - set colors
SYNTAX
XStoreColors(display, colormap, color, ncolors)
Display *display;
Colormap colormap;
XColor color[];
int ncolors;
XStoreColor(display, colormap, color)
Display *display;
Colormap colormap;
XColor *color;
XStoreNamedColor(display, colormap, color, pixel, flags)
Display *display;
Colormap colormap;
char *color;
unsigned long pixel;
int flags;
ARGUMENTS
color Specifies the pixel and RGB values or the color
name string (for example, red).
color Specifies an array of color definition structures
to be stored.
colormap Specifies the colormap.
display Specifies the connection to the X server.
flags Specifies which red, green, and blue components
are set.
ncolors Specifies the number of XColor structures in the
color definition array.
pixel Specifies the entry in the colormap.
DESCRIPTION
The XStoreColors function changes the colormap entries of
the pixel values specified in the pixel members of the
XColor structures. You specify which color components are
to be changed by setting DoRed, DoGreen, and/or DoBlue in
the flags member of the XColor structures. If the colormap
is an installed map for its screen, the changes are visible
immediately. XStoreColors changes the specified pixels if
they are allocated writable in the colormap by any client,
even if one or more pixels generates an error. If a
specified pixel is not a valid index into the colormap, a
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BadValue error results. If a specified pixel either 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.
XStoreColors can generate BadAccess, BadColor, and BadValue
errors.
The XStoreColor function changes the colormap entry of the
pixel value specified in the pixel member of the XColor
structure. You specified this value in the pixel member of
the XColor structure. This pixel value must be a read/write
cell and a valid index into the colormap. If a specified
pixel is not a valid index into the colormap, a BadValue
error results. XStoreColor also changes the red, green,
and/or blue color components. You specify which color
components are to be changed by setting DoRed, DoGreen,
and/or DoBlue in the flags member of the XColor structure.
If the colormap is an installed map for its screen, the
changes are visible immediately.
XStoreColor can generate BadAccess, BadColor, and BadValue
errors.
The XStoreNamedColor function looks up the named color with
respect to the screen associated with the colormap and
stores the result in the specified colormap. The pixel
argument determines the entry in the colormap. The flags
argument determines which of the red, green, and blue
components are set. You can set this member to the bitwise
inclusive OR of the bits DoRed, DoGreen, and DoBlue. 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. If the specified pixel is not a
valid index into the colormap, a BadValue error results. If
the specified pixel either is unallocated or is allocated
read-only, a BadAccess error results.
XStoreNamedColor can generate BadAccess, BadColor, BadName,
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.
BadName A font or color of the specified name does not
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exist.
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
XAllocColor(3X11), XCreateColormap(3X11), XQueryColor(3X11)
Xlib - C Language X Interface
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