XcmsQueryColor(3X11) X11R5 XcmsQueryColor(3X11)NAME
XcmsQueryColor, XcmsQueryColors, XcmsLookupColor - obtain color values
SYNTAX
Status XcmsQueryColor(display, colormap, color_in_out, result_format)
Display *display;
Colormap colormap;
XcmsColor *color_in_out;
XcmsColorFormat result_format;
Status XcmsQueryColors(display, colormap, colors_in_out, ncolors,
result_format)
Display *display;
Colormap colormap;
XcmsColor colors_in_out[];
unsigned int ncolors;
XcmsColorFormat result_format;
Status XcmsLookupColor(display, colormap, color_string,
color_exact_return, color_screen_return,
result_format)
Display *display;
Colormap colormap;
char *color_string;
XcmsColor *color_exact_return, *color_screen_return;
XcmsColorFormat result_format;
ARGUMENTS
display Specifies the connection to the X server.
colormap Specifies the colormap.
color_exact_return
Returns the color specification parsed from the color string
or parsed from the corresponding string found in a color name
database.
color_in_out
Specifies the pixel member that indicates the color cell to
query, and the color specification stored for the color cell
is returned in this structure.
color_screen_return
Returns the color that can be reproduced on the
color_string
Specifies the color string.
result_format
Specifies the color format for the returned color specifica‐
tions (color_screen_return and color_exact_return arguments).
If format is and the color string contains a numerical color
specification, the specification is returned in the format
used in that numerical color specification. If format is and
the color string contains a color name, the specification is
returned in the format used to store the color in the data‐
base.
ncolors Specifies the number of structures in the color specification
array.
DESCRIPTION
The function obtains the RGB value for the pixel value in the pixel
member of the specified structure, and then converts the value to the
target format as specified by the result_format argument. If the pixel
is not a valid index into the specified colormap, a error results. The
function obtains the RGB values for pixel values in the pixel members
of structures, and then converts the values to the target format as
specified by the result_format argument. If a pixel is not a valid
index into the specified colormap, a error results. If more than one
pixel is in error, the one that gets reported is arbitrary.
and can generate and errors.
The function looks up the string name of a color with respect to the
screen associated with the specified 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. The values are
returned in the format specified by result_format. If the color name
is not in the Host Portable Character Encoding the result is implemen‐
tation dependent. Use of uppercase or lowercase does not matter.
returns or if the name is resolved, otherwise it returns If is
returned, then the color specification in color_screen_return is the
result of gamut compression.
DIAGNOSTICS
A value for a Colormap argument does not name a defined Colormap.
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 ALSOXcmsAllocColor(3X11), XcmsStoreColor(3X11), XQueryColor(3X11)
Xlib - C Language X Interface
XcmsQueryColor(3X11)
