xenocara/xserver/randr/rrmode.c
matthieu e927c03e30 Update to xserver 1.18.3. Tested by shadchin@ and naddy@.
Note that indirect GLX is now disbled by default.
2016-05-29 12:02:34 +00:00

376 lines
9.3 KiB
C

/*
* 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.
*/
#include "randrstr.h"
RESTYPE RRModeType;
static Bool
RRModeEqual(xRRModeInfo * a, xRRModeInfo * b)
{
if (a->width != b->width)
return FALSE;
if (a->height != b->height)
return FALSE;
if (a->dotClock != b->dotClock)
return FALSE;
if (a->hSyncStart != b->hSyncStart)
return FALSE;
if (a->hSyncEnd != b->hSyncEnd)
return FALSE;
if (a->hTotal != b->hTotal)
return FALSE;
if (a->hSkew != b->hSkew)
return FALSE;
if (a->vSyncStart != b->vSyncStart)
return FALSE;
if (a->vSyncEnd != b->vSyncEnd)
return FALSE;
if (a->vTotal != b->vTotal)
return FALSE;
if (a->nameLength != b->nameLength)
return FALSE;
if (a->modeFlags != b->modeFlags)
return FALSE;
return TRUE;
}
/*
* Keep a list so it's easy to find modes in the resource database.
*/
static int num_modes;
static RRModePtr *modes;
static RRModePtr
RRModeCreate(xRRModeInfo * modeInfo, const char *name, ScreenPtr userScreen)
{
RRModePtr mode, *newModes;
if (!RRInit())
return NULL;
mode = malloc(sizeof(RRModeRec) + modeInfo->nameLength + 1);
if (!mode)
return NULL;
mode->refcnt = 1;
mode->mode = *modeInfo;
mode->name = (char *) (mode + 1);
memcpy(mode->name, name, modeInfo->nameLength);
mode->name[modeInfo->nameLength] = '\0';
mode->userScreen = userScreen;
if (num_modes)
newModes = reallocarray(modes, num_modes + 1, sizeof(RRModePtr));
else
newModes = malloc(sizeof(RRModePtr));
if (!newModes) {
free(mode);
return NULL;
}
mode->mode.id = FakeClientID(0);
if (!AddResource(mode->mode.id, RRModeType, (void *) mode)) {
free(newModes);
return NULL;
}
modes = newModes;
modes[num_modes++] = mode;
/*
* give the caller a reference to this mode
*/
++mode->refcnt;
return mode;
}
static RRModePtr
RRModeFindByName(const char *name, CARD16 nameLength)
{
int i;
RRModePtr mode;
for (i = 0; i < num_modes; i++) {
mode = modes[i];
if (mode->mode.nameLength == nameLength &&
!memcmp(name, mode->name, nameLength)) {
return mode;
}
}
return NULL;
}
RRModePtr
RRModeGet(xRRModeInfo * modeInfo, const char *name)
{
int i;
for (i = 0; i < num_modes; i++) {
RRModePtr mode = modes[i];
if (RRModeEqual(&mode->mode, modeInfo) &&
!memcmp(name, mode->name, modeInfo->nameLength)) {
++mode->refcnt;
return mode;
}
}
return RRModeCreate(modeInfo, name, NULL);
}
static RRModePtr
RRModeCreateUser(ScreenPtr pScreen,
xRRModeInfo * modeInfo, const char *name, int *error)
{
RRModePtr mode;
mode = RRModeFindByName(name, modeInfo->nameLength);
if (mode) {
*error = BadName;
return NULL;
}
mode = RRModeCreate(modeInfo, name, pScreen);
if (!mode) {
*error = BadAlloc;
return NULL;
}
*error = Success;
return mode;
}
RRModePtr *
RRModesForScreen(ScreenPtr pScreen, int *num_ret)
{
rrScrPriv(pScreen);
int o, c, m;
RRModePtr *screen_modes;
int num_screen_modes = 0;
screen_modes = xallocarray((num_modes ? num_modes : 1), sizeof(RRModePtr));
if (!screen_modes)
return NULL;
/*
* Add modes from all outputs
*/
for (o = 0; o < pScrPriv->numOutputs; o++) {
RROutputPtr output = pScrPriv->outputs[o];
int n;
for (m = 0; m < output->numModes + output->numUserModes; m++) {
RRModePtr mode = (m < output->numModes ?
output->modes[m] :
output->userModes[m - output->numModes]);
for (n = 0; n < num_screen_modes; n++)
if (screen_modes[n] == mode)
break;
if (n == num_screen_modes)
screen_modes[num_screen_modes++] = mode;
}
}
/*
* Add modes from all crtcs. The goal is to
* make sure all available and active modes
* are visible to the client
*/
for (c = 0; c < pScrPriv->numCrtcs; c++) {
RRCrtcPtr crtc = pScrPriv->crtcs[c];
RRModePtr mode = crtc->mode;
int n;
if (!mode)
continue;
for (n = 0; n < num_screen_modes; n++)
if (screen_modes[n] == mode)
break;
if (n == num_screen_modes)
screen_modes[num_screen_modes++] = mode;
}
/*
* Add all user modes for this screen
*/
for (m = 0; m < num_modes; m++) {
RRModePtr mode = modes[m];
int n;
if (mode->userScreen != pScreen)
continue;
for (n = 0; n < num_screen_modes; n++)
if (screen_modes[n] == mode)
break;
if (n == num_screen_modes)
screen_modes[num_screen_modes++] = mode;
}
*num_ret = num_screen_modes;
return screen_modes;
}
void
RRModeDestroy(RRModePtr mode)
{
int m;
if (--mode->refcnt > 0)
return;
for (m = 0; m < num_modes; m++) {
if (modes[m] == mode) {
memmove(modes + m, modes + m + 1,
(num_modes - m - 1) * sizeof(RRModePtr));
num_modes--;
if (!num_modes) {
free(modes);
modes = NULL;
}
break;
}
}
free(mode);
}
static int
RRModeDestroyResource(void *value, XID pid)
{
RRModeDestroy((RRModePtr) value);
return 1;
}
/*
* Initialize mode type
*/
Bool
RRModeInit(void)
{
assert(num_modes == 0);
assert(modes == NULL);
RRModeType = CreateNewResourceType(RRModeDestroyResource, "MODE");
if (!RRModeType)
return FALSE;
return TRUE;
}
/*
* Initialize mode type error value
*/
void
RRModeInitErrorValue(void)
{
SetResourceTypeErrorValue(RRModeType, RRErrorBase + BadRRMode);
}
int
ProcRRCreateMode(ClientPtr client)
{
REQUEST(xRRCreateModeReq);
xRRCreateModeReply rep;
WindowPtr pWin;
ScreenPtr pScreen;
xRRModeInfo *modeInfo;
long units_after;
char *name;
int error, rc;
RRModePtr mode;
REQUEST_AT_LEAST_SIZE(xRRCreateModeReq);
rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
if (rc != Success)
return rc;
pScreen = pWin->drawable.pScreen;
modeInfo = &stuff->modeInfo;
name = (char *) (stuff + 1);
units_after = (stuff->length - bytes_to_int32(sizeof(xRRCreateModeReq)));
/* check to make sure requested name fits within the data provided */
if (bytes_to_int32(modeInfo->nameLength) > units_after)
return BadLength;
mode = RRModeCreateUser(pScreen, modeInfo, name, &error);
if (!mode)
return error;
rep = (xRRCreateModeReply) {
.type = X_Reply,
.sequenceNumber = client->sequence,
.length = 0,
.mode = mode->mode.id
};
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swapl(&rep.mode);
}
WriteToClient(client, sizeof(xRRCreateModeReply), &rep);
/* Drop out reference to this mode */
RRModeDestroy(mode);
return Success;
}
int
ProcRRDestroyMode(ClientPtr client)
{
REQUEST(xRRDestroyModeReq);
RRModePtr mode;
REQUEST_SIZE_MATCH(xRRDestroyModeReq);
VERIFY_RR_MODE(stuff->mode, mode, DixDestroyAccess);
if (!mode->userScreen)
return BadMatch;
if (mode->refcnt > 1)
return BadAccess;
FreeResource(stuff->mode, 0);
return Success;
}
int
ProcRRAddOutputMode(ClientPtr client)
{
REQUEST(xRRAddOutputModeReq);
RRModePtr mode;
RROutputPtr output;
REQUEST_SIZE_MATCH(xRRAddOutputModeReq);
VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
return RROutputAddUserMode(output, mode);
}
int
ProcRRDeleteOutputMode(ClientPtr client)
{
REQUEST(xRRDeleteOutputModeReq);
RRModePtr mode;
RROutputPtr output;
REQUEST_SIZE_MATCH(xRRDeleteOutputModeReq);
VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
return RROutputDeleteUserMode(output, mode);
}