Xrandr.h

/*
 * $XFree86: xc/lib/Xrandr/Xrandr.h,v 1.9 2002/09/29 23:39:44 keithp Exp $
 *
 * Copyright © 2000 Compaq Computer Corporation, Inc.
 * Copyright © 2002 Hewlett-Packard Company, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Compaq not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  HP makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * HP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL COMPAQ
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Author:  Jim Gettys, HP Labs, HP.
 */

#ifndef _XRANDR_H_
#define _XRANDR_H_

#include <X11/extensions/randr.h>

#include <X11/Xfuncproto.h>

_XFUNCPROTOBEGIN

    
typedef struct {
    int	width, height;
    int	mwidth, mheight;
} XRRScreenSize;

/*
 *  Events.
 */

typedef struct {
    int type;			/* event base */
    unsigned long serial;	/* # of last request processed by server */
    Bool send_event;		/* true if this came from a SendEvent request */
    Display *display;		/* Display the event was read from */
    Window window;		/* window which selected for this event */
    Window root;		/* Root window for changed screen */
    Time timestamp;		/* when the screen change occurred */
    Time config_timestamp;	/* when the last configuration change */
    SizeID size_index;
    SubpixelOrder subpixel_order;
    Rotation rotation;
    int width;
    int height;
    int mwidth;
    int mheight;
} XRRScreenChangeNotifyEvent;


/* internal representation is private to the library */
typedef struct _XRRScreenConfiguration XRRScreenConfiguration;	

Bool XRRQueryExtension (Display *dpy, int *event_basep, int *error_basep);
Status XRRQueryVersion (Display *dpy,
			    int     *major_versionp,
			    int     *minor_versionp);

XRRScreenConfiguration *XRRGetScreenInfo (Display *dpy,
					  Drawable draw);
    
void XRRFreeScreenConfigInfo (XRRScreenConfiguration *config);

/* 
 * Note that screen configuration changes are only permitted if the client can
 * prove it has up to date configuration information.  We are trying to
 * insist that it become possible for screens to change dynamically, so
 * we want to ensure the client knows what it is talking about when requesting
 * changes.
 */
Status XRRSetScreenConfig (Display *dpy, 
			   XRRScreenConfiguration *config,
			   Drawable draw,
			   int size_index,
			   Rotation rotation,
			   Time timestamp);

/* added in v1.1, sorry for the lame name */
Status XRRSetScreenConfigAndRate (Display *dpy, 
				  XRRScreenConfiguration *config,
				  Drawable draw,
				  int size_index,
				  Rotation rotation,
				  short rate,
				  Time timestamp);


Rotation XRRConfigRotations(XRRScreenConfiguration *config, Rotation *current_rotation);

Time XRRConfigTimes (XRRScreenConfiguration *config, Time *config_timestamp);

XRRScreenSize *XRRConfigSizes(XRRScreenConfiguration *config, int *nsizes);

short *XRRConfigRates (XRRScreenConfiguration *config, int sizeID, int *nrates);

SizeID XRRConfigCurrentConfiguration (XRRScreenConfiguration *config, 
			      Rotation *rotation);
    
short XRRConfigCurrentRate (XRRScreenConfiguration *config);

int XRRRootToScreen(Display *dpy, Window root);

/* 
 * returns the screen configuration for the specified screen; does a lazy
 * evalution to delay getting the information, and caches the result.
 * These routines should be used in preference to XRRGetScreenInfo
 * to avoid unneeded round trips to the X server.  These are new
 * in protocol version 0.1.
 */


XRRScreenConfiguration *XRRScreenConfig(Display *dpy, int screen);
XRRScreenConfiguration *XRRConfig(Screen *screen);
void XRRSelectInput(Display *dpy, Window window, int mask);

/* 
 * the following are always safe to call, even if RandR is not implemented 
 * on a screen 
 */


Rotation XRRRotations(Display *dpy, int screen, Rotation *current_rotation);
XRRScreenSize *XRRSizes(Display *dpy, int screen, int *nsizes);
short *XRRRates (Display *dpy, int screen, int sizeID, int *nrates);
Time XRRTimes (Display *dpy, int screen, Time *config_timestamp);


/* 
 * intended to take RRScreenChangeNotify,  or 
 * ConfigureNotify (on the root window)
 * returns 1 if it is an event type it understands, 0 if not
 */
int XRRUpdateConfiguration(XEvent *event);

_XFUNCPROTOEND

#endif /* _XRANDR_H_ */