unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (Debian-5.0)
Page:
Section:
Apropos / Subsearch:
optional field

XcmsAllocColor(3)               XLIB FUNCTIONS               XcmsAllocColor(3)



NAME
       XcmsAllocColor, XcmsAllocNamedColor - allocate colors

SYNTAX
       Status XcmsAllocColor(Display *display, Colormap colormap, XcmsColor
              *color_in_out, XcmsColorFormat result_format);

       Status XcmsAllocNamedColor(Display *display, Colormap colormap, char
              *color_string, XcmsColor *color_screen_return, XcmsColor
              *color_exact_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 color to allocate and returns the pixel and
                 color that is actually used in the colormap.

       color_screen_return
                 Returns the pixel value of the color cell and color specifi-
                 cation that actually is stored for that cell.

       color_string
                 Specifies the color string whose color definition structure
                 is to be returned.

       result_format
                 Specifies the color format for the returned color specifica-
                 tion.

DESCRIPTION
       The XcmsAllocColor function is similar to XAllocColor except the color
       can be specified in any format.  The XcmsAllocColor function ultimately
       calls XAllocColor to allocate a read-only color cell (colormap entry)
       with the specified color.  XcmsAllocColor first converts the color
       specified to an RGB value and then passes this to XAllocColor.  XcmsAl-
       locColor returns the pixel value of the color cell and the color speci-
       fication actually allocated.  This returned color specification is the
       result of converting the RGB value returned by XAllocColor into the
       format specified with the result_format argument.  If there is no
       interest in a returned color specification, unnecessary computation can
       be bypassed if result_format is set to XcmsRGBFormat.  The correspond-
       ing colormap cell is read-only.  If this routine returns XcmsFailure,
       the color_in_out color specification is left unchanged.

       XcmsAllocColor can generate a BadColor errors.

       The XcmsAllocNamedColor function is similar to XAllocNamedColor except
       that the color returned can be in any format specified.  This function
       ultimately calls XAllocColor to allocate a read-only color cell with
       the color specified by a color string.  The color string is parsed into
       an XcmsColor structure (see XcmsLookupColor), converted to an RGB
       value, and finally passed to XAllocColor.  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.

       This function returns both the color specification as a result of pars-
       ing (exact specification) and the actual color specification stored
       (screen specification).  This screen specification is the result of
       converting the RGB value returned by XAllocColor into the format speci-
       fied in result_format.  If there is no interest in a returned color
       specification, unnecessary computation can be bypassed if result_format
       is set to XcmsRGBFormat.  If color_screen_return and color_exact_return
       point to the same structure, the pixel field will be set correctly, but
       the color values are undefined.

       XcmsAllocNamedColor can generate a BadColor errors.

DIAGNOSTICS
       BadColor  A value for a Colormap argument does not name a defined Col-
                 ormap.

SEE ALSO
       XcmsQueryColor(3X11), XcmsStoreColor(3X11)
       Xlib - C Language X Interface



X Version 11                     libX11 1.1.5                XcmsAllocColor(3)