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/*
* Copyright © 2006 Keith Packard
* Copyright © 2008 Red Hat, 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 the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <limits.h>
#include <stdio.h>
#include <X11/Xlib.h>
/* we need to be able to manipulate the Display structure on events */
#include <X11/Xlibint.h>
#include <X11/extensions/render.h>
#include <X11/extensions/Xrender.h>
#include "Xrandrint.h"
#define OutputInfoExtra (SIZEOF(xRRGetOutputInfoReply) - 32)
XRROutputInfo *
XRRGetOutputInfo (Display *dpy, XRRScreenResources *resources, RROutput output)
{
XExtDisplayInfo *info = XRRFindDisplay(dpy);
xRRGetOutputInfoReply rep;
xRRGetOutputInfoReq *req;
int nbytes, nbytesRead, rbytes;
XRROutputInfo *xoi;
RRCheckExtension (dpy, info, NULL);
LockDisplay (dpy);
GetReq (RRGetOutputInfo, req);
req->reqType = info->codes->major_opcode;
req->randrReqType = X_RRGetOutputInfo;
req->output = output;
req->configTimestamp = resources->configTimestamp;
if (!_XReply (dpy, (xReply *) &rep, OutputInfoExtra >> 2, xFalse))
{
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
if (rep.length > INT_MAX >> 2 || rep.length < (OutputInfoExtra >> 2))
{
if (rep.length > (OutputInfoExtra >> 2))
_XEatDataWords (dpy, rep.length - (OutputInfoExtra >> 2));
else
_XEatDataWords (dpy, rep.length);
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
nbytes = ((long) (rep.length) << 2) - OutputInfoExtra;
nbytesRead = (long) (rep.nCrtcs * 4 +
rep.nModes * 4 +
rep.nClones * 4 +
((rep.nameLength + 3) & ~3));
/*
* first we must compute how much space to allocate for
* randr library's use; we'll allocate the structures in a single
* allocation, on cleanlyness grounds.
*/
rbytes = (sizeof (XRROutputInfo) +
rep.nCrtcs * sizeof (RRCrtc) +
rep.nModes * sizeof (RRMode) +
rep.nClones * sizeof (RROutput) +
rep.nameLength + 1); /* '\0' terminate name */
xoi = (XRROutputInfo *) Xmalloc(rbytes);
if (xoi == NULL) {
_XEatDataWords (dpy, rep.length - (OutputInfoExtra >> 2));
UnlockDisplay (dpy);
SyncHandle ();
return NULL;
}
xoi->timestamp = rep.timestamp;
xoi->crtc = rep.crtc;
xoi->mm_width = rep.mmWidth;
xoi->mm_height = rep.mmHeight;
xoi->connection = rep.connection;
xoi->subpixel_order = rep.subpixelOrder;
xoi->ncrtc = rep.nCrtcs;
xoi->crtcs = (RRCrtc *) (xoi + 1);
xoi->nmode = rep.nModes;
xoi->npreferred = rep.nPreferred;
xoi->modes = (RRMode *) (xoi->crtcs + rep.nCrtcs);
xoi->nclone = rep.nClones;
xoi->clones = (RROutput *) (xoi->modes + rep.nModes);
xoi->name = (char *) (xoi->clones + rep.nClones);
_XRead32 (dpy, (long *) xoi->crtcs, rep.nCrtcs << 2);
_XRead32 (dpy, (long *) xoi->modes, rep.nModes << 2);
_XRead32 (dpy, (long *) xoi->clones, rep.nClones << 2);
/*
* Read name and '\0' terminate
*/
_XReadPad (dpy, xoi->name, rep.nameLength);
xoi->name[rep.nameLength] = '\0';
xoi->nameLen = rep.nameLength;
/*
* Skip any extra data
*/
if (nbytes > nbytesRead)
_XEatData (dpy, (unsigned long) (nbytes - nbytesRead));
UnlockDisplay (dpy);
SyncHandle ();
return (XRROutputInfo *) xoi;
}
void
XRRFreeOutputInfo (XRROutputInfo *outputInfo)
{
Xfree (outputInfo);
}
static Bool
_XRRHasOutputPrimary (int major, int minor)
{
return major > 1 || (major == 1 && minor >= 3);
}
void
XRRSetOutputPrimary(Display *dpy, Window window, RROutput output)
{
XExtDisplayInfo *info = XRRFindDisplay(dpy);
xRRSetOutputPrimaryReq *req;
int major_version, minor_version;
RRSimpleCheckExtension (dpy, info);
if (!XRRQueryVersion (dpy, &major_version, &minor_version) ||
!_XRRHasOutputPrimary (major_version, minor_version))
return;
LockDisplay(dpy);
GetReq (RRSetOutputPrimary, req);
req->reqType = info->codes->major_opcode;
req->randrReqType = X_RRSetOutputPrimary;
req->window = window;
req->output = output;
UnlockDisplay (dpy);
SyncHandle ();
}
RROutput
XRRGetOutputPrimary(Display *dpy, Window window)
{
XExtDisplayInfo *info = XRRFindDisplay(dpy);
xRRGetOutputPrimaryReq *req;
xRRGetOutputPrimaryReply rep;
int major_version, minor_version;
RRCheckExtension (dpy, info, 0);
if (!XRRQueryVersion (dpy, &major_version, &minor_version) ||
!_XRRHasOutputPrimary (major_version, minor_version))
return None;
LockDisplay(dpy);
GetReq (RRGetOutputPrimary, req);
req->reqType = info->codes->major_opcode;
req->randrReqType = X_RRGetOutputPrimary;
req->window = window;
if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
rep.output = None;
UnlockDisplay(dpy);
SyncHandle();
return rep.output;
}
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