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+/*
+ * Copyright © 2000 Compaq Computer Corporation, Inc.
+ * Copyright © 2002 Hewlett Packard Company, Inc.
+ * Copyright © 2006 Keith Packard
+ *
+ * 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.
+ *
+ * Author: Jim Gettys, HP Labs, HP.
+ * Author: Keith Packard, Intel Corporation
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#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"
+
+static XRRScreenConfiguration *_XRRGetScreenInfo (Display *dpy, Window window);
+
+Rotation XRRConfigRotations(XRRScreenConfiguration *config, Rotation *current_rotation)
+{
+ *current_rotation = config->current_rotation;
+ return config->rotations;
+}
+
+XRRScreenSize *XRRConfigSizes(XRRScreenConfiguration *config, int *nsizes)
+{
+ *nsizes = config->nsizes;
+ return config->sizes;
+}
+
+short *XRRConfigRates (XRRScreenConfiguration *config, int sizeID, int *nrates)
+{
+ short *r = config->rates;
+ int nents = config->nrates;
+
+ /* Skip over the intervening rate lists */
+ while (sizeID > 0 && nents > 0)
+ {
+ int i = (*r + 1);
+ r += i;
+ nents -= i;
+ sizeID--;
+ }
+ if (!nents)
+ {
+ *nrates = 0;
+ return 0;
+ }
+ *nrates = (int) *r;
+ return r + 1;
+}
+
+Time XRRConfigTimes (XRRScreenConfiguration *config, Time *config_timestamp)
+{
+ *config_timestamp = config->config_timestamp;
+ return config->timestamp;
+}
+
+
+SizeID XRRConfigCurrentConfiguration (XRRScreenConfiguration *config,
+ Rotation *rotation)
+{
+ *rotation = (Rotation) config->current_rotation;
+ return (SizeID) config->current_size;
+}
+
+short XRRConfigCurrentRate (XRRScreenConfiguration *config)
+{
+ return config->current_rate;
+}
+
+/*
+ * Go get the screen configuration data and salt it away for future use;
+ * returns NULL if extension not supported
+ */
+static XRRScreenConfiguration *_XRRValidateCache (Display *dpy, int screen)
+{
+ XExtDisplayInfo *info = XRRFindDisplay (dpy);
+ XRRScreenConfiguration **configs;
+ XRandRInfo *xrri;
+
+ if (XextHasExtension(info)) {
+ xrri = (XRandRInfo *) info->data;
+ configs = xrri->config;
+
+ if (configs[screen] == NULL)
+ configs[screen] = _XRRGetScreenInfo (dpy, RootWindow(dpy, screen));
+ return configs[screen];
+ } else {
+ return NULL;
+ }
+}
+
+/* given a screen, return the information from the (possibly) cached data */
+Rotation XRRRotations(Display *dpy, int screen, Rotation *current_rotation)
+{
+ XRRScreenConfiguration *config;
+ Rotation cr;
+ LockDisplay(dpy);
+ if ((config = _XRRValidateCache(dpy, screen))) {
+ *current_rotation = config->current_rotation;
+ cr = config->rotations;
+ UnlockDisplay(dpy);
+ return cr;
+ }
+ else {
+ UnlockDisplay(dpy);
+ *current_rotation = RR_Rotate_0;
+ return 0; /* no rotations supported */
+ }
+}
+
+/* given a screen, return the information from the (possibly) cached data */
+XRRScreenSize *XRRSizes(Display *dpy, int screen, int *nsizes)
+{
+ XRRScreenConfiguration *config;
+ XRRScreenSize *sizes;
+
+ LockDisplay(dpy);
+ if ((config = _XRRValidateCache(dpy, screen))) {
+ *nsizes = config->nsizes;
+ sizes = config->sizes;
+ UnlockDisplay(dpy);
+ return sizes;
+ }
+ else {
+ UnlockDisplay(dpy);
+ *nsizes = 0;
+ return NULL;
+ }
+}
+
+short *XRRRates (Display *dpy, int screen, int sizeID, int *nrates)
+{
+ XRRScreenConfiguration *config;
+ short *rates;
+
+ LockDisplay(dpy);
+ if ((config = _XRRValidateCache(dpy, screen))) {
+ rates = XRRConfigRates (config, sizeID, nrates);
+ UnlockDisplay(dpy);
+ return rates;
+ }
+ else {
+ UnlockDisplay(dpy);
+ *nrates = 0;
+ return NULL;
+ }
+}
+
+/* given a screen, return the information from the (possibly) cached data */
+Time XRRTimes (Display *dpy, int screen, Time *config_timestamp)
+{
+ XRRScreenConfiguration *config;
+ Time ts;
+
+ LockDisplay(dpy);
+ if ((config = _XRRValidateCache(dpy, screen))) {
+ *config_timestamp = config->config_timestamp;
+ ts = config->timestamp;
+ UnlockDisplay(dpy);
+ return ts;
+ } else {
+ UnlockDisplay(dpy);
+ return CurrentTime;
+ }
+}
+
+/* need a version that does not hold the display lock */
+static XRRScreenConfiguration *_XRRGetScreenInfo (Display *dpy, Window window)
+{
+ XExtDisplayInfo *info = XRRFindDisplay(dpy);
+ xRRGetScreenInfoReply rep;
+ xRRGetScreenInfoReq *req;
+ _XAsyncHandler async;
+ _XRRVersionState async_state;
+ int nbytes, nbytesRead, rbytes;
+ int i;
+ xScreenSizes size;
+ struct _XRRScreenConfiguration *scp;
+ XRRScreenSize *ssp;
+ short *rates;
+ xRRQueryVersionReq *vreq;
+ XRandRInfo *xrri;
+ Bool getting_version = False;
+
+ RRCheckExtension (dpy, info, 0);
+
+ xrri = (XRandRInfo *) info->data;
+
+ if (xrri->major_version == -1)
+ {
+ /* hide a version query in the request */
+ GetReq (RRQueryVersion, vreq);
+ vreq->reqType = info->codes->major_opcode;
+ vreq->randrReqType = X_RRQueryVersion;
+ vreq->majorVersion = RANDR_MAJOR;
+ vreq->minorVersion = RANDR_MINOR;
+
+ async_state.version_seq = dpy->request;
+ async_state.error = False;
+ async.next = dpy->async_handlers;
+ async.handler = _XRRVersionHandler;
+ async.data = (XPointer) &async_state;
+ dpy->async_handlers = &async;
+
+ getting_version = True;
+ }
+
+ GetReq (RRGetScreenInfo, req);
+ req->reqType = info->codes->major_opcode;
+ req->randrReqType = X_RRGetScreenInfo;
+ req->window = window;
+
+ if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
+ {
+ if (getting_version)
+ DeqAsyncHandler (dpy, &async);
+ SyncHandle ();
+ return NULL;
+ }
+ if (getting_version)
+ {
+ DeqAsyncHandler (dpy, &async);
+ if (async_state.error)
+ {
+ SyncHandle();
+ }
+ xrri->major_version = async_state.major_version;
+ xrri->minor_version = async_state.minor_version;
+ xrri->has_rates = _XRRHasRates (xrri->minor_version, xrri->major_version);
+ }
+
+ /*
+ * Make the reply compatible with v1.1
+ */
+ if (!xrri->has_rates)
+ {
+ rep.rate = 0;
+ rep.nrateEnts = 0;
+ }
+
+ nbytes = (long) rep.length << 2;
+
+ nbytesRead = (long) (rep.nSizes * SIZEOF (xScreenSizes) +
+ ((rep.nrateEnts + 1)& ~1) * 2 /* SIZEOF (CARD16) */);
+
+ /*
+ * 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 (XRRScreenConfiguration) +
+ (rep.nSizes * sizeof (XRRScreenSize) +
+ rep.nrateEnts * sizeof (int));
+
+ scp = (struct _XRRScreenConfiguration *) Xmalloc(rbytes);
+ if (scp == NULL) {
+ _XEatData (dpy, (unsigned long) nbytes);
+ SyncHandle ();
+ return NULL;
+ }
+
+
+ ssp = (XRRScreenSize *)(scp + 1);
+ rates = (short *) (ssp + rep.nSizes);
+
+ /* set up the screen configuration structure */
+ scp->screen =
+ ScreenOfDisplay (dpy, XRRRootToScreen(dpy, rep.root));
+
+ scp->sizes = ssp;
+ scp->rates = rates;
+ scp->rotations = rep.setOfRotations;
+ scp->current_size = rep.sizeID;
+ scp->current_rate = rep.rate;
+ scp->current_rotation = rep.rotation;
+ scp->timestamp = rep.timestamp;
+ scp->config_timestamp = rep.configTimestamp;
+ scp->nsizes = rep.nSizes;
+ scp->nrates = rep.nrateEnts;
+
+ /*
+ * Time to unpack the data from the server.
+ */
+
+ /*
+ * First the size information
+ */
+ for (i = 0; i < rep.nSizes; i++) {
+ _XReadPad (dpy, (char *) &size, SIZEOF (xScreenSizes));
+
+ ssp[i].width = size.widthInPixels;
+ ssp[i].height = size.heightInPixels;
+ ssp[i].mwidth = size.widthInMillimeters;
+ ssp[i].mheight = size.heightInMillimeters;
+ }
+ /*
+ * And the rates
+ */
+ _XRead16Pad (dpy, rates, 2 /* SIZEOF (CARD16) */ * rep.nrateEnts);
+
+ /*
+ * Skip any extra data
+ */
+ if (nbytes > nbytesRead)
+ _XEatData (dpy, (unsigned long) (nbytes - nbytesRead));
+
+ return (XRRScreenConfiguration *)(scp);
+}
+
+XRRScreenConfiguration *XRRGetScreenInfo (Display *dpy, Window window)
+{
+ XRRScreenConfiguration *config;
+ XRRFindDisplay(dpy);
+ LockDisplay (dpy);
+ config = _XRRGetScreenInfo(dpy, window);
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return config;
+}
+
+
+void XRRFreeScreenConfigInfo (XRRScreenConfiguration *config)
+{
+ Xfree (config);
+}
+
+Status XRRSetScreenConfigAndRate (Display *dpy,
+ XRRScreenConfiguration *config,
+ Drawable draw,
+ int size_index,
+ Rotation rotation,
+ short rate,
+ Time timestamp)
+{
+ XExtDisplayInfo *info = XRRFindDisplay (dpy);
+ xRRSetScreenConfigReply rep;
+ XRandRInfo *xrri;
+ int major, minor;
+
+ RRCheckExtension (dpy, info, 0);
+
+ /* Make sure has_rates is set */
+ if (!XRRQueryVersion (dpy, &major, &minor))
+ return 0;
+
+ LockDisplay (dpy);
+ xrri = (XRandRInfo *) info->data;
+ if (xrri->has_rates)
+ {
+ xRRSetScreenConfigReq *req;
+ GetReq (RRSetScreenConfig, req);
+ req->reqType = info->codes->major_opcode;
+ req->randrReqType = X_RRSetScreenConfig;
+ req->drawable = draw;
+ req->sizeID = size_index;
+ req->rotation = rotation;
+ req->timestamp = timestamp;
+ req->configTimestamp = config->config_timestamp;
+ req->rate = rate;
+ }
+ else
+ {
+ xRR1_0SetScreenConfigReq *req;
+ GetReq (RR1_0SetScreenConfig, req);
+ req->reqType = info->codes->major_opcode;
+ req->randrReqType = X_RRSetScreenConfig;
+ req->drawable = draw;
+ req->sizeID = size_index;
+ req->rotation = rotation;
+ req->timestamp = timestamp;
+ req->configTimestamp = config->config_timestamp;
+ }
+
+ (void) _XReply (dpy, (xReply *) &rep, 0, xTrue);
+
+ if (rep.status == RRSetConfigSuccess) {
+ /* if we succeed, set our view of reality to what we set it to */
+ config->config_timestamp = rep.newConfigTimestamp;
+ config->timestamp = rep.newTimestamp;
+ config->screen = ScreenOfDisplay (dpy, XRRRootToScreen(dpy, rep.root));
+ config->current_size = size_index;
+ config->current_rotation = rotation;
+ }
+ UnlockDisplay (dpy);
+ SyncHandle ();
+ return(rep.status);
+}
+
+Status XRRSetScreenConfig (Display *dpy,
+ XRRScreenConfiguration *config,
+ Drawable draw,
+ int size_index,
+ Rotation rotation, Time timestamp)
+{
+ return XRRSetScreenConfigAndRate (dpy, config, draw, size_index,
+ rotation, 0, timestamp);
+}