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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;
pixel
member that indicates the color cell to query.
The color specification stored for the color cell is
returned in this XcmsColor structure.
pixel
member of the specified XcmsColor 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 in the specified colormap,
a ``BadValue'' error results.
The XcmsQueryColors function obtains the RGB
values for pixel values in the pixel members of XcmsColor
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 ``BadValue'' error results.
If more than one pixel is in error,
the one that gets reported is arbitrary.
XcmsQueryColor and XcmsQueryColors can generate ``BadColor'' and ``BadValue'' errors.
The XcmsLookupColor 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 implementation-dependent. Use of uppercase or lowercase does not matter. XcmsLookupColor returns XcmsSuccess or XcmsSuccessWithCompression if the name is resolved; otherwise, it returns XcmsFailure. If XcmsSuccessWithCompression is returned, then the color specification returned in color_screen_return is the result of gamut compression.