x11r4 man page for xpsetimageresolution

XpSetImageResolution(3Xp)					 XPRINT FUNCTIONS					 XpSetImageResolution(3Xp)

NAME
       XpSetImageResolution - Sets the resolution for subsequent PutImage requests

SYNOPSIS
	     cc [ flag... ] file... -lXp [ library... ]
	     #include <X11/extensions/Print.h>

       Bool XpSetImageResolution ( display, print_context, image_res, prev_res_return )
	     Display * display ;
	     XPContext	print_context ;
	     int  image_res ;
	     int * prev_res_return ;

ARGUMENTS
       - display
	      Specifies a pointer to the Display structure.

       - print_context
	      Specifies the print context on which to set the resolution.

       - image_res
	      Specifies the image resolution in pixels per inch.

       - prev_res_return
	      Returns the previous image resolution in pixels per inch.

DESCRIPTION
       XpSetImageResolution returns True if the printer server allowed the resolution to be set, otherwise False is returned.

       XpSetImageResolution sets the resolution for subsequent PutImage requests to the screen of the specified print context. If the return value
       is False, then the print server does not support image scaling for the  particular  resolution  given  the  current  configuration  of  the
       printer,  and  the  application	is  responsible  for any desired scaling. If the return value is True, then the contents of any subsequent
       PutImage request to a Pixmap or to a Window on the screen of the specified print context will automatically be scaled as part of the PutIm-
       age request. The scale factor is:

	   default_printer_resolution / image_res

       Where  default_printer_resolution is the current value of that page attribute. Only the image itself is scaled (meaning the effective width
       and height of the image change), the dst-x and dst-y parameters to PutImage are not altered.

       As a special case, a value of zero for image_res resets the resolution to automatically track the printer resolution; in this  case  (which
       is also the default setting for a newly created print context), subsequent images will not be scaled.

       If  the	return value is True and prev_res_return is a non-NULL pointer, then the previous image resolution that was set for the print con-
       text is stored in prev_res_return.

       XpSetImageResolution returns False immediately if image_res is negative or greater than 65535.

DIAGNOSTICS
       XpBadContext   A valid print context-id has not been set prior to making this call.

X Version 11							    libXp 1.0.0 					 XpSetImageResolution(3Xp)