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xserver-multidpi/randr/rrmonitor.c

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/*
* Copyright © 2014 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.
*/
#include "randrstr.h"
#include "swaprep.h"
static Atom
RRMonitorCrtcName(RRCrtcPtr crtc)
{
char name[20];
if (crtc->numOutputs) {
RROutputPtr output = crtc->outputs[0];
return MakeAtom(output->name, output->nameLength, TRUE);
}
sprintf(name, "Monitor-%08lx", (unsigned long int)crtc->id);
return MakeAtom(name, strlen(name), TRUE);
}
static Bool
RRMonitorCrtcPrimary(RRCrtcPtr crtc)
{
ScreenPtr screen = crtc->pScreen;
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int o;
for (o = 0; o < crtc->numOutputs; o++)
if (crtc->outputs[o] == pScrPriv->primaryOutput)
return TRUE;
return FALSE;
}
#define DEFAULT_PIXELS_PER_MM (96.0 / 25.4)
static void
RRMonitorGetCrtcGeometry(RRCrtcPtr crtc, RRMonitorGeometryPtr geometry)
{
ScreenPtr screen = crtc->pScreen;
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
BoxRec panned_area;
/* Check to see if crtc is panned and return the full area when applicable. */
if (pScrPriv && pScrPriv->rrGetPanning &&
pScrPriv->rrGetPanning(screen, crtc, &panned_area, NULL, NULL) &&
(panned_area.x2 > panned_area.x1) &&
(panned_area.y2 > panned_area.y1)) {
geometry->box = panned_area;
}
else {
int width, height;
RRCrtcGetScanoutSize(crtc, &width, &height);
geometry->box.x1 = crtc->x;
geometry->box.y1 = crtc->y;
geometry->box.x2 = geometry->box.x1 + width;
geometry->box.y2 = geometry->box.y1 + height;
}
if (crtc->numOutputs && crtc->outputs[0]->mmWidth && crtc->outputs[0]->mmHeight) {
RROutputPtr output = crtc->outputs[0];
geometry->mmWidth = output->mmWidth;
geometry->mmHeight = output->mmHeight;
} else {
geometry->mmWidth = floor ((geometry->box.x2 - geometry->box.x1) / DEFAULT_PIXELS_PER_MM + 0.5);
geometry->mmHeight = floor ((geometry->box.y2 - geometry->box.y1) / DEFAULT_PIXELS_PER_MM + 0.5);
}
}
static Bool
RRMonitorSetFromServer(RRCrtcPtr crtc, RRMonitorPtr monitor)
{
int o;
monitor->name = RRMonitorCrtcName(crtc);
monitor->pScreen = crtc->pScreen;
monitor->numOutputs = crtc->numOutputs;
monitor->outputs = calloc(crtc->numOutputs, sizeof(RROutput));
if (!monitor->outputs)
return FALSE;
for (o = 0; o < crtc->numOutputs; o++)
monitor->outputs[o] = crtc->outputs[o]->id;
monitor->primary = RRMonitorCrtcPrimary(crtc);
monitor->automatic = TRUE;
RRMonitorGetCrtcGeometry(crtc, &monitor->geometry);
return TRUE;
}
static Bool
RRMonitorAutomaticGeometry(RRMonitorPtr monitor)
{
return (monitor->geometry.box.x1 == 0 &&
monitor->geometry.box.y1 == 0 &&
monitor->geometry.box.x2 == 0 &&
monitor->geometry.box.y2 == 0);
}
static void
RRMonitorGetGeometry(RRMonitorPtr monitor, RRMonitorGeometryPtr geometry)
{
if (RRMonitorAutomaticGeometry(monitor) && monitor->numOutputs > 0) {
ScreenPtr screen = monitor->pScreen;
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
RRMonitorGeometryRec first = { .box = { 0, 0, 0, 0 }, .mmWidth = 0, .mmHeight = 0 };
RRMonitorGeometryRec this;
int c, o, co;
int active_crtcs = 0;
*geometry = first;
for (o = 0; o < monitor->numOutputs; o++) {
RRCrtcPtr crtc = NULL;
Bool in_use = FALSE;
for (c = 0; !in_use && c < pScrPriv->numCrtcs; c++) {
crtc = pScrPriv->crtcs[c];
if (!crtc->mode)
continue;
for (co = 0; !in_use && co < crtc->numOutputs; co++)
if (monitor->outputs[o] == crtc->outputs[co]->id)
in_use = TRUE;
}
if (!in_use)
continue;
RRMonitorGetCrtcGeometry(crtc, &this);
if (active_crtcs == 0) {
first = this;
*geometry = this;
} else {
geometry->box.x1 = min(this.box.x1, geometry->box.x1);
geometry->box.x2 = max(this.box.x2, geometry->box.x2);
geometry->box.y1 = min(this.box.y1, geometry->box.y1);
geometry->box.y2 = max(this.box.y2, geometry->box.y2);
}
active_crtcs++;
}
/* Adjust physical sizes to account for total area */
if (active_crtcs > 1 && first.box.x2 != first.box.x1 && first.box.y2 != first.box.y1) {
geometry->mmWidth = (this.box.x2 - this.box.x1) / (first.box.x2 - first.box.x1) * first.mmWidth;
geometry->mmHeight = (this.box.y2 - this.box.y1) / (first.box.y2 - first.box.y1) * first.mmHeight;
}
} else {
*geometry = monitor->geometry;
}
}
static Bool
RRMonitorSetFromClient(RRMonitorPtr client_monitor, RRMonitorPtr monitor)
{
monitor->name = client_monitor->name;
monitor->pScreen = client_monitor->pScreen;
monitor->numOutputs = client_monitor->numOutputs;
monitor->outputs = calloc(client_monitor->numOutputs, sizeof (RROutput));
if (!monitor->outputs && client_monitor->numOutputs)
return FALSE;
memcpy(monitor->outputs, client_monitor->outputs, client_monitor->numOutputs * sizeof (RROutput));
monitor->primary = client_monitor->primary;
monitor->automatic = client_monitor->automatic;
RRMonitorGetGeometry(client_monitor, &monitor->geometry);
return TRUE;
}
typedef struct _rrMonitorList {
int num_client;
int num_server;
RRCrtcPtr *server_crtc;
int num_crtcs;
int client_primary;
int server_primary;
} RRMonitorListRec, *RRMonitorListPtr;
static Bool
RRMonitorInitList(ScreenPtr screen, RRMonitorListPtr mon_list, Bool get_active)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int m, o, c, sc;
int numCrtcs;
ScreenPtr slave;
if (!RRGetInfo(screen, FALSE))
return FALSE;
/* Count the number of crtcs in this and any slave screens */
numCrtcs = pScrPriv->numCrtcs;
xorg_list_for_each_entry(slave, &screen->slave_list, slave_head) {
rrScrPrivPtr pSlavePriv;
if (!slave->is_output_slave)
continue;
pSlavePriv = rrGetScrPriv(slave);
numCrtcs += pSlavePriv->numCrtcs;
}
mon_list->num_crtcs = numCrtcs;
mon_list->server_crtc = calloc(numCrtcs * 2, sizeof (RRCrtcPtr));
if (!mon_list->server_crtc)
return FALSE;
/* Collect pointers to all of the active crtcs */
c = 0;
for (sc = 0; sc < pScrPriv->numCrtcs; sc++, c++) {
if (pScrPriv->crtcs[sc]->mode != NULL)
mon_list->server_crtc[c] = pScrPriv->crtcs[sc];
}
xorg_list_for_each_entry(slave, &screen->slave_list, slave_head) {
rrScrPrivPtr pSlavePriv;
if (!slave->is_output_slave)
continue;
pSlavePriv = rrGetScrPriv(slave);
for (sc = 0; sc < pSlavePriv->numCrtcs; sc++, c++) {
if (pSlavePriv->crtcs[sc]->mode != NULL)
mon_list->server_crtc[c] = pSlavePriv->crtcs[sc];
}
}
/* Walk the list of client-defined monitors, clearing the covered
* CRTCs from the full list and finding whether one of the
* monitors is primary
*/
mon_list->num_client = pScrPriv->numMonitors;
mon_list->client_primary = -1;
for (m = 0; m < pScrPriv->numMonitors; m++) {
RRMonitorPtr monitor = pScrPriv->monitors[m];
if (get_active) {
RRMonitorGeometryRec geom;
RRMonitorGetGeometry(monitor, &geom);
if (geom.box.x2 - geom.box.x1 == 0 ||
geom.box.y2 - geom.box.y1 == 0) {
mon_list->num_client--;
continue;
}
}
if (monitor->primary && mon_list->client_primary == -1)
mon_list->client_primary = m;
for (o = 0; o < monitor->numOutputs; o++) {
for (c = 0; c < numCrtcs; c++) {
RRCrtcPtr crtc = mon_list->server_crtc[c];
if (crtc) {
int co;
for (co = 0; co < crtc->numOutputs; co++)
if (crtc->outputs[co]->id == monitor->outputs[o]) {
mon_list->server_crtc[c] = NULL;
break;
}
}
}
}
}
/* Now look at the active CRTCs, and count
* those not covered by a client monitor, as well
* as finding whether one of them is marked primary
*/
mon_list->num_server = 0;
mon_list->server_primary = -1;
for (c = 0; c < mon_list->num_crtcs; c++) {
RRCrtcPtr crtc = mon_list->server_crtc[c];
if (!crtc)
continue;
mon_list->num_server++;
if (RRMonitorCrtcPrimary(crtc) && mon_list->server_primary == -1)
mon_list->server_primary = c;
}
return TRUE;
}
static void
RRMonitorFiniList(RRMonitorListPtr list)
{
free(list->server_crtc);
}
/* Construct a complete list of protocol-visible monitors, including
* the manually generated ones as well as those generated
* automatically from the remaining CRCTs
*/
Bool
RRMonitorMakeList(ScreenPtr screen, Bool get_active, RRMonitorPtr *monitors_ret, int *nmon_ret)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
RRMonitorListRec list;
int m, c;
RRMonitorPtr mon, monitors;
Bool has_primary = FALSE;
if (!pScrPriv)
return FALSE;
if (!RRMonitorInitList(screen, &list, get_active))
return FALSE;
monitors = calloc(list.num_client + list.num_server, sizeof (RRMonitorRec));
if (!monitors) {
RRMonitorFiniList(&list);
return FALSE;
}
mon = monitors;
/* Fill in the primary monitor data first
*/
if (list.client_primary >= 0) {
RRMonitorSetFromClient(pScrPriv->monitors[list.client_primary], mon);
mon++;
} else if (list.server_primary >= 0) {
RRMonitorSetFromServer(list.server_crtc[list.server_primary], mon);
mon++;
}
/* Fill in the client-defined monitors next
*/
for (m = 0; m < pScrPriv->numMonitors; m++) {
if (m == list.client_primary)
continue;
if (get_active) {
RRMonitorGeometryRec geom;
RRMonitorGetGeometry(pScrPriv->monitors[m], &geom);
if (geom.box.x2 - geom.box.x1 == 0 ||
geom.box.y2 - geom.box.y1 == 0) {
continue;
}
}
RRMonitorSetFromClient(pScrPriv->monitors[m], mon);
if (has_primary)
mon->primary = FALSE;
else if (mon->primary)
has_primary = TRUE;
mon++;
}
/* And finish with the list of crtc-inspired monitors
*/
for (c = 0; c < list.num_crtcs; c++) {
RRCrtcPtr crtc = list.server_crtc[c];
if (c == list.server_primary && list.client_primary < 0)
continue;
if (!list.server_crtc[c])
continue;
RRMonitorSetFromServer(crtc, mon);
if (has_primary)
mon->primary = FALSE;
else if (mon->primary)
has_primary = TRUE;
mon++;
}
RRMonitorFiniList(&list);
*nmon_ret = list.num_client + list.num_server;
*monitors_ret = monitors;
return TRUE;
}
int
RRMonitorCountList(ScreenPtr screen)
{
RRMonitorListRec list;
int nmon;
if (!RRMonitorInitList(screen, &list, FALSE))
return -1;
nmon = list.num_client + list.num_server;
RRMonitorFiniList(&list);
return nmon;
}
void
RRMonitorFree(RRMonitorPtr monitor)
{
free(monitor);
}
RRMonitorPtr
RRMonitorAlloc(int noutput)
{
RRMonitorPtr monitor;
monitor = calloc(1, sizeof (RRMonitorRec) + noutput * sizeof (RROutput));
if (!monitor)
return NULL;
monitor->numOutputs = noutput;
monitor->outputs = (RROutput *) (monitor + 1);
return monitor;
}
static int
RRMonitorDelete(ClientPtr client, ScreenPtr screen, Atom name)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int m;
if (!pScrPriv) {
client->errorValue = name;
return BadAtom;
}
for (m = 0; m < pScrPriv->numMonitors; m++) {
RRMonitorPtr monitor = pScrPriv->monitors[m];
if (monitor->name == name) {
memmove(pScrPriv->monitors + m, pScrPriv->monitors + m + 1,
(pScrPriv->numMonitors - (m + 1)) * sizeof (RRMonitorPtr));
--pScrPriv->numMonitors;
RRMonitorFree(monitor);
return Success;
}
}
client->errorValue = name;
return BadValue;
}
static Bool
RRMonitorMatchesOutputName(ScreenPtr screen, Atom name)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int o;
const char *str = NameForAtom(name);
int len = strlen(str);
for (o = 0; o < pScrPriv->numOutputs; o++) {
RROutputPtr output = pScrPriv->outputs[o];
if (output->nameLength == len && !memcmp(output->name, str, len))
return TRUE;
}
return FALSE;
}
int
RRMonitorAdd(ClientPtr client, ScreenPtr screen, RRMonitorPtr monitor)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int m;
ScreenPtr slave;
RRMonitorPtr *monitors;
if (!pScrPriv)
return BadAlloc;
/* 'name' must not match the name of any Output on the screen, or
* a Value error results.
*/
if (RRMonitorMatchesOutputName(screen, monitor->name)) {
client->errorValue = monitor->name;
return BadValue;
}
xorg_list_for_each_entry(slave, &screen->slave_list, slave_head) {
if (!slave->is_output_slave)
continue;
if (RRMonitorMatchesOutputName(slave, monitor->name)) {
client->errorValue = monitor->name;
return BadValue;
}
}
/* 'name' must not match the name of any Monitor on the screen, or
* a Value error results.
*/
for (m = 0; m < pScrPriv->numMonitors; m++) {
if (pScrPriv->monitors[m]->name == monitor->name) {
client->errorValue = monitor->name;
return BadValue;
}
}
/* Allocate space for the new pointer. This is done before
* removing matching monitors as it may fail, and the request
* needs to not have any side-effects on failure
*/
if (pScrPriv->numMonitors)
monitors = reallocarray(pScrPriv->monitors,
pScrPriv->numMonitors + 1,
sizeof (RRMonitorPtr));
else
monitors = malloc(sizeof (RRMonitorPtr));
if (!monitors)
return BadAlloc;
pScrPriv->monitors = monitors;
for (m = 0; m < pScrPriv->numMonitors; m++) {
RRMonitorPtr existing = pScrPriv->monitors[m];
int o, eo;
/* If 'name' matches an existing Monitor on the screen, the
* existing one will be deleted as if RRDeleteMonitor were called.
*/
if (existing->name == monitor->name) {
(void) RRMonitorDelete(client, screen, existing->name);
continue;
}
/* For each output in 'info.outputs', each one is removed from all
* pre-existing Monitors. If removing the output causes the list
* of outputs for that Monitor to become empty, then that
* Monitor will be deleted as if RRDeleteMonitor were called.
*/
for (eo = 0; eo < existing->numOutputs; eo++) {
for (o = 0; o < monitor->numOutputs; o++) {
if (monitor->outputs[o] == existing->outputs[eo]) {
memmove(existing->outputs + eo, existing->outputs + eo + 1,
(existing->numOutputs - (eo + 1)) * sizeof (RROutput));
--existing->numOutputs;
--eo;
break;
}
}
if (existing->numOutputs == 0) {
(void) RRMonitorDelete(client, screen, existing->name);
break;
}
}
if (monitor->primary)
existing->primary = FALSE;
}
/* Add the new one to the list
*/
pScrPriv->monitors[pScrPriv->numMonitors++] = monitor;
return Success;
}
void
RRMonitorFreeList(RRMonitorPtr monitors, int nmon)
{
int m;
for (m = 0; m < nmon; m++)
free(monitors[m].outputs);
free(monitors);
}
void
RRMonitorInit(ScreenPtr screen)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
if (!pScrPriv)
return;
pScrPriv->numMonitors = 0;
pScrPriv->monitors = NULL;
}
void
RRMonitorClose(ScreenPtr screen)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
int m;
if (!pScrPriv)
return;
for (m = 0; m < pScrPriv->numMonitors; m++)
RRMonitorFree(pScrPriv->monitors[m]);
free(pScrPriv->monitors);
pScrPriv->monitors = NULL;
pScrPriv->numMonitors = 0;
}
static CARD32
RRMonitorTimestamp(ScreenPtr screen)
{
rrScrPrivPtr pScrPriv = rrGetScrPriv(screen);
/* XXX should take client monitor changes into account */
return pScrPriv->lastConfigTime.milliseconds;
}
int
ProcRRGetMonitors(ClientPtr client)
{
REQUEST(xRRGetMonitorsReq);
xRRGetMonitorsReply rep = {
.type = X_Reply,
.sequenceNumber = client->sequence,
.length = 0,
};
WindowPtr window;
ScreenPtr screen;
int r;
RRMonitorPtr monitors;
int nmonitors;
int noutputs;
int m;
Bool get_active;
REQUEST_SIZE_MATCH(xRRGetMonitorsReq);
r = dixLookupWindow(&window, stuff->window, client, DixGetAttrAccess);
if (r != Success)
return r;
screen = window->drawable.pScreen;
get_active = stuff->get_active;
if (!RRMonitorMakeList(screen, get_active, &monitors, &nmonitors))
return BadAlloc;
rep.timestamp = RRMonitorTimestamp(screen);
noutputs = 0;
for (m = 0; m < nmonitors; m++) {
rep.length += SIZEOF(xRRMonitorInfo) >> 2;
rep.length += monitors[m].numOutputs;
noutputs += monitors[m].numOutputs;
}
rep.nmonitors = nmonitors;
rep.noutputs = noutputs;
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swapl(&rep.timestamp);
swapl(&rep.nmonitors);
swapl(&rep.noutputs);
}
WriteToClient(client, sizeof(xRRGetMonitorsReply), &rep);
client->pSwapReplyFunc = (ReplySwapPtr) CopySwap32Write;
for (m = 0; m < nmonitors; m++) {
RRMonitorPtr monitor = &monitors[m];
xRRMonitorInfo info = {
.name = monitor->name,
.primary = monitor->primary,
.automatic = monitor->automatic,
.noutput = monitor->numOutputs,
.x = monitor->geometry.box.x1,
.y = monitor->geometry.box.y1,
.width = monitor->geometry.box.x2 - monitor->geometry.box.x1,
.height = monitor->geometry.box.y2 - monitor->geometry.box.y1,
.widthInMillimeters = monitor->geometry.mmWidth,
.heightInMillimeters = monitor->geometry.mmHeight,
};
if (client->swapped) {
swapl(&info.name);
swaps(&info.noutput);
swaps(&info.x);
swaps(&info.y);
swaps(&info.width);
swaps(&info.height);
swapl(&info.widthInMillimeters);
swapl(&info.heightInMillimeters);
}
WriteToClient(client, sizeof(xRRMonitorInfo), &info);
WriteSwappedDataToClient(client, monitor->numOutputs * sizeof (RROutput), monitor->outputs);
}
RRMonitorFreeList(monitors, nmonitors);
return Success;
}
int
ProcRRSetMonitor(ClientPtr client)
{
REQUEST(xRRSetMonitorReq);
WindowPtr window;
ScreenPtr screen;
RRMonitorPtr monitor;
int r;
REQUEST_AT_LEAST_SIZE(xRRSetMonitorReq);
if (stuff->monitor.noutput != stuff->length - (SIZEOF(xRRSetMonitorReq) >> 2))
return BadLength;
r = dixLookupWindow(&window, stuff->window, client, DixGetAttrAccess);
if (r != Success)
return r;
screen = window->drawable.pScreen;
if (!ValidAtom(stuff->monitor.name))
return BadAtom;
/* Allocate the new monitor */
monitor = RRMonitorAlloc(stuff->monitor.noutput);
if (!monitor)
return BadAlloc;
/* Fill in the bits from the request */
monitor->pScreen = screen;
monitor->name = stuff->monitor.name;
monitor->primary = stuff->monitor.primary;
monitor->automatic = FALSE;
memcpy(monitor->outputs, stuff + 1, stuff->monitor.noutput * sizeof (RROutput));
monitor->geometry.box.x1 = stuff->monitor.x;
monitor->geometry.box.y1 = stuff->monitor.y;
monitor->geometry.box.x2 = stuff->monitor.x + stuff->monitor.width;
monitor->geometry.box.y2 = stuff->monitor.y + stuff->monitor.height;
monitor->geometry.mmWidth = stuff->monitor.widthInMillimeters;
monitor->geometry.mmHeight = stuff->monitor.heightInMillimeters;
r = RRMonitorAdd(client, screen, monitor);
if (r == Success)
RRSendConfigNotify(screen);
else
RRMonitorFree(monitor);
return r;
}
int
ProcRRDeleteMonitor(ClientPtr client)
{
REQUEST(xRRDeleteMonitorReq);
WindowPtr window;
ScreenPtr screen;
int r;
REQUEST_SIZE_MATCH(xRRDeleteMonitorReq);
r = dixLookupWindow(&window, stuff->window, client, DixGetAttrAccess);
if (r != Success)
return r;
screen = window->drawable.pScreen;
if (!ValidAtom(stuff->name)) {
client->errorValue = stuff->name;
return BadAtom;
}
r = RRMonitorDelete(client, screen, stuff->name);
if (r == Success)
RRSendConfigNotify(screen);
return r;
}
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