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XcmsScreenInitProc()					  XcmsScreenInitProc()

Name
  XcmsScreenInitProc  – interface specification for the Function Set rou‐
  tine that obtains and initializes per-screen information.

Synopsis
  typedef    Status	(*XcmsScreenInitProc)(display,	   screen_number,
  screen_info)
	   Display *display;
	   int screen_number;
	   XcmsPerScrnInfo *screen_info;

Arguments
  display   Specifies the connection to the X server.

  screen_number
	    Specifies the appropriate screen number on the host server.

  screen_info
	    Specifies  the  XcmsPerScrnInfo structure, which contains the
	    per-screen information.

Returns
  Zero on failure, non-zero on success.

Availability
  Release 5 and later.

Description
  The screen initialization function  in  the  XcmsFunctionSet	structure
  fetches the Color Characterization Data (device profile) for the speci‐
  fied screen, typically off properties on the screen's root window; then
  it initializes the specified XcmsPerScrnInfo structure.  If successful,
  the procedure fills in the XcmsPerScrnInfo structure as follows:

  ·  It sets the screenData member to the address of the  created  device
     profile data structure (contents known only by the function set).

  ·  It next sets the screenWhitePoint member.

  ·  It	 next sets the functionSet member to the address of the XcmsFunc‐
     tionSet structure.

  ·  It then sets the state member to XcmsInitSuccess and finally returns
     XcmsSuccess.

  If unsuccessful, the procedure sets the state member to XcmsInitFailure
  and returns XcmsFailure.

Structures
  The XcmsPerScrnInfo structure contains:

  typedef struct _XcmsPerScrnInfo {
      XcmsColor screenWhitePoint;
      XPointer functionSet;
      XPointer screenData;
      unsigned char state;
      char pad[3];
  } XcmsPerScrnInfo;

  The screenWhitePoint member specifies the white point inherent  to  the
  screen.  The functionSet member specifies the appropriate Function Set.
  The screenData member specifies the device profile.  The  state  member
  is set to one of the following:

  ·  XcmsInitNone   indicates  initialization  has  not	 been  previously
     attempted.

  ·  XcmsInitFailure  indicates	 initialization	  has	been   previously
     attempted but failed.

  ·  XcmsInitSuccess   indicates   initialization   has	 been  previously
     attempted and succeeded.

See Also
  XcmsFunctionSet, XcmsScreenFreeProc.

Xlib - Device-independent Color				  XcmsScreenInitProc()

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