Name

Syntax

Status XcmsQueryColor(Display *display, Colormap colormap,

XcmsColor *color_in_out, XcmsColorFormat result_format);

Status XcmsQueryColors(Display *display, Colormap

colormap, XcmsColor colors_in_out[], unsigned int ncolors, XcmsColorFormat result_format);

Status XcmsLookupColor(Display *display, Colormap

colormap, char *color_string, XcmsColor *color_exact_return, XcmsColor *color_screen_return, XcmsColorFormat result_format);

Arguments

Specifies the connection to the X server.

Specifies the colormap.

Returns the color specification parsed from the color string or parsed from the corresponding string found in a color-name database.

Specifies the pixel member that indicates the color cell to query. The color specification stored for the color cell is returned in this XcmsColor structure.

Returns the color that can be reproduced on the screen.

Specifies the color stringSt.

Specifies the color format for the returned color specifications (color_screen_return and color_exact_return arguments). If the format is XcmsUndefinedFormat and the color string contains a numerical color specification, the specification is returned in the format used in that numerical color specification. If the format is XcmsUndefinedFormat and the color string contains a color name, the specification is returned in the format used to store the color in the database.

Specifies the number of XcmsColor structures in the color-specification array.

Description

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, the color specification returned in color_screen_return is the result of gamut compression.

Diagnostics

BadColor

A value for a Colormap argument does not name a defined Colormap.

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

Table of Contents

• Name
• Syntax
• Arguments
• Description
• Diagnostics
• See Also