DMXChangeScreensAttributes(3X)

NAME

       DMXChangeScreensAttributes - change back-end screen attributes

SYNOPSIS

       #include <X11/extensions/dmxext.h>

       int DMXChangeScreensAttributes(Display *dpy,
                                      int screen_count,
                                      int *screens,
                                      int mask_count,
                                      unsigned int *masks,
                                      DMXScreenAttributes *attr,
                                      int *error_screen);

DESCRIPTION

       DMXChangeScreensAttributes()  changes  the  geometries and positions of
       the DMX screen  and  DMX  root  windows  on  the  back-end  X  servers.
       screen_count  specifies  the number of screens to be changed.  For each
       screen, the screen number is placed in screens, an  attribute  mask  is
       placed  in  masks,  and  a DMXScreenAttributes structure is included in
       attr.

       An  explanation  of  the  DMXScreenAttributes  structure  is  given  in
       DMXGetScreenAttributes(3X).

       The values that are used to compute each value in masks are as follows

       DMXScreenWindowWidth
       DMXScreenWindowHeight
       DMXScreenWindowXoffset
       DMXScreenWindowYoffset
       DMXRootWindowWidth
       DMXRootWindowHeight
       DMXRootWindowXoffset
       DMXRootWindowYoffset
       DMXRootWindowXorigin
       DMXRootWindowYorigin

       In  general, mask_count should be equal to screen_count.  However, as a
       convenience, mask_count may be less than  screen_count,  and  the  last
       entry in masks will then be used for all of the remaining screens.  For
       example, this allows identical changes to be made  to  several  screens
       using only one mask.

RETURN VALUE

       On success, 0 is returned.  Otherwise, error_screen is set to the value
       of the first screen in the list that caused the error  and  a  non-zero
       value is returned.  If screen_count or mask_count is less than 1, or if
       any of the attribute values are not  within  the  appropriate  bounding
       boxes,   DmxBadValue   is   returned.   If  a  protocol  error  occurs,
       DmxBadReply is returned.

       DMXChangeScreensAttributes() can generate BadLength (if the  data  pro-
       vided  does  not match the data implicitly required by the screen_count
       and mask_count values), BadValue (if the  values  in  screens  are  not
       valid), and BadAlloc errors.

SEE ALSO

       DMXGetScreenCount(3X), DMXGetScreenAttributes(3X), DMX(3X), Xdmx(1)

X Version 11                     libdmx 1.0.2   DMXChangeScreensAttributes(3X)