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Diffstat (limited to 'src/XrrConfig.c')
| -rw-r--r-- | src/XrrConfig.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/src/XrrConfig.c b/src/XrrConfig.c new file mode 100644 index 0000000..443a77b --- /dev/null +++ b/src/XrrConfig.c @@ -0,0 +1,423 @@ +/* + * 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); +} |