Unix/Linux Go Back    


CentOS 7.0 - man page for xcmsallocnamedcolor (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


XcmsAllocColor(3)			  XLIB FUNCTIONS			XcmsAllocColor(3)

NAME
       XcmsAllocColor, XcmsAllocNamedColor - allocate colors

SYNTAX
       Status XcmsAllocColor(Display *display, Colormap colormap, XcmsColor *color_in_out, Xcms-
	      ColorFormat result_format);

       Status XcmsAllocNamedColor(Display *display, Colormap colormap, char *color_string, Xcms-
	      Color *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 specification 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 specification.

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.  XcmsAllocColor
       returns the pixel value of the color cell and the color specification 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 corresponding 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 parsing (exact specifi-
       cation) 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 specified in result_format.  If there is no interest in a returned color specifica-
       tion, 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 Colormap.

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

X Version 11				   libX11 1.6.0 			XcmsAllocColor(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 10:02 PM.