sync code with last improvements from OpenBSD
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26235 changed files with 29195616 additions and 0 deletions
381
xserver/randr/rrmode.c
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381
xserver/randr/rrmode.c
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/*
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* Copyright © 2006 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "randrstr.h"
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RESTYPE RRModeType;
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static Bool
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RRModeEqual(xRRModeInfo * a, xRRModeInfo * b)
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{
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if (a->width != b->width)
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return FALSE;
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if (a->height != b->height)
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return FALSE;
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if (a->dotClock != b->dotClock)
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return FALSE;
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if (a->hSyncStart != b->hSyncStart)
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return FALSE;
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if (a->hSyncEnd != b->hSyncEnd)
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return FALSE;
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if (a->hTotal != b->hTotal)
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return FALSE;
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if (a->hSkew != b->hSkew)
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return FALSE;
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if (a->vSyncStart != b->vSyncStart)
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return FALSE;
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if (a->vSyncEnd != b->vSyncEnd)
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return FALSE;
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if (a->vTotal != b->vTotal)
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return FALSE;
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if (a->nameLength != b->nameLength)
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return FALSE;
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if (a->modeFlags != b->modeFlags)
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return FALSE;
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return TRUE;
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}
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/*
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* Keep a list so it's easy to find modes in the resource database.
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*/
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static int num_modes;
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static RRModePtr *modes;
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static RRModePtr
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RRModeCreate(xRRModeInfo * modeInfo, const char *name, ScreenPtr userScreen)
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{
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RRModePtr mode, *newModes;
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if (!RRInit())
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return NULL;
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mode = malloc(sizeof(RRModeRec) + modeInfo->nameLength + 1);
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if (!mode)
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return NULL;
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mode->refcnt = 1;
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mode->mode = *modeInfo;
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mode->name = (char *) (mode + 1);
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memcpy(mode->name, name, modeInfo->nameLength);
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mode->name[modeInfo->nameLength] = '\0';
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mode->userScreen = userScreen;
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if (num_modes)
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newModes = reallocarray(modes, num_modes + 1, sizeof(RRModePtr));
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else
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newModes = malloc(sizeof(RRModePtr));
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if (!newModes) {
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free(mode);
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return NULL;
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}
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mode->mode.id = FakeClientID(0);
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if (!AddResource(mode->mode.id, RRModeType, (void *) mode)) {
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free(newModes);
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return NULL;
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}
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modes = newModes;
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modes[num_modes++] = mode;
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/*
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* give the caller a reference to this mode
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*/
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++mode->refcnt;
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return mode;
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}
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static RRModePtr
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RRModeFindByName(const char *name, CARD16 nameLength)
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{
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int i;
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RRModePtr mode;
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for (i = 0; i < num_modes; i++) {
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mode = modes[i];
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if (mode->mode.nameLength == nameLength &&
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!memcmp(name, mode->name, nameLength)) {
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return mode;
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}
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}
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return NULL;
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}
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RRModePtr
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RRModeGet(xRRModeInfo * modeInfo, const char *name)
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{
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int i;
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for (i = 0; i < num_modes; i++) {
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RRModePtr mode = modes[i];
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if (RRModeEqual(&mode->mode, modeInfo) &&
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!memcmp(name, mode->name, modeInfo->nameLength)) {
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++mode->refcnt;
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return mode;
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}
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}
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return RRModeCreate(modeInfo, name, NULL);
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}
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static RRModePtr
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RRModeCreateUser(ScreenPtr pScreen,
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xRRModeInfo * modeInfo, const char *name, int *error)
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{
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RRModePtr mode;
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mode = RRModeFindByName(name, modeInfo->nameLength);
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if (mode) {
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*error = BadName;
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return NULL;
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}
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mode = RRModeCreate(modeInfo, name, pScreen);
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if (!mode) {
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*error = BadAlloc;
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return NULL;
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}
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*error = Success;
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return mode;
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}
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RRModePtr *
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RRModesForScreen(ScreenPtr pScreen, int *num_ret)
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{
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rrScrPriv(pScreen);
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int o, c, m;
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RRModePtr *screen_modes;
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int num_screen_modes = 0;
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screen_modes = xallocarray((num_modes ? num_modes : 1), sizeof(RRModePtr));
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if (!screen_modes)
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return NULL;
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/*
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* Add modes from all outputs
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*/
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for (o = 0; o < pScrPriv->numOutputs; o++) {
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RROutputPtr output = pScrPriv->outputs[o];
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int n;
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for (m = 0; m < output->numModes + output->numUserModes; m++) {
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RRModePtr mode = (m < output->numModes ?
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output->modes[m] :
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output->userModes[m - output->numModes]);
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for (n = 0; n < num_screen_modes; n++)
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if (screen_modes[n] == mode)
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break;
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if (n == num_screen_modes)
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screen_modes[num_screen_modes++] = mode;
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}
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}
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/*
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* Add modes from all crtcs. The goal is to
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* make sure all available and active modes
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* are visible to the client
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*/
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for (c = 0; c < pScrPriv->numCrtcs; c++) {
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RRCrtcPtr crtc = pScrPriv->crtcs[c];
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RRModePtr mode = crtc->mode;
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int n;
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if (!mode)
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continue;
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for (n = 0; n < num_screen_modes; n++)
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if (screen_modes[n] == mode)
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break;
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if (n == num_screen_modes)
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screen_modes[num_screen_modes++] = mode;
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}
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/*
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* Add all user modes for this screen
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*/
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for (m = 0; m < num_modes; m++) {
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RRModePtr mode = modes[m];
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int n;
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if (mode->userScreen != pScreen)
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continue;
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for (n = 0; n < num_screen_modes; n++)
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if (screen_modes[n] == mode)
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break;
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if (n == num_screen_modes)
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screen_modes[num_screen_modes++] = mode;
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}
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*num_ret = num_screen_modes;
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return screen_modes;
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}
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void
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RRModeDestroy(RRModePtr mode)
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{
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int m;
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if (--mode->refcnt > 0)
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return;
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for (m = 0; m < num_modes; m++) {
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if (modes[m] == mode) {
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memmove(modes + m, modes + m + 1,
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(num_modes - m - 1) * sizeof(RRModePtr));
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num_modes--;
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if (!num_modes) {
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free(modes);
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modes = NULL;
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}
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break;
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}
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}
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free(mode);
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}
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static int
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RRModeDestroyResource(void *value, XID pid)
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{
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RRModeDestroy((RRModePtr) value);
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return 1;
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}
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/*
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* Initialize mode type
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*/
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Bool
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RRModeInit(void)
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{
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assert(num_modes == 0);
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assert(modes == NULL);
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RRModeType = CreateNewResourceType(RRModeDestroyResource, "MODE");
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if (!RRModeType)
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return FALSE;
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return TRUE;
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}
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/*
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* Initialize mode type error value
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*/
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void
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RRModeInitErrorValue(void)
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{
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SetResourceTypeErrorValue(RRModeType, RRErrorBase + BadRRMode);
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}
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int
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ProcRRCreateMode(ClientPtr client)
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{
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REQUEST(xRRCreateModeReq);
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xRRCreateModeReply rep;
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WindowPtr pWin;
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ScreenPtr pScreen;
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xRRModeInfo *modeInfo;
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long units_after;
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char *name;
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int error, rc;
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RRModePtr mode;
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REQUEST_AT_LEAST_SIZE(xRRCreateModeReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
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if (rc != Success)
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return rc;
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pScreen = pWin->drawable.pScreen;
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modeInfo = &stuff->modeInfo;
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name = (char *) (stuff + 1);
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units_after = (stuff->length - bytes_to_int32(sizeof(xRRCreateModeReq)));
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/* check to make sure requested name fits within the data provided */
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if (bytes_to_int32(modeInfo->nameLength) > units_after)
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return BadLength;
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mode = RRModeCreateUser(pScreen, modeInfo, name, &error);
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if (!mode)
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return error;
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rep = (xRRCreateModeReply) {
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.type = X_Reply,
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.sequenceNumber = client->sequence,
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.length = 0,
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.mode = mode->mode.id
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};
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.mode);
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}
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WriteToClient(client, sizeof(xRRCreateModeReply), &rep);
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/* Drop out reference to this mode */
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RRModeDestroy(mode);
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return Success;
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}
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int
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ProcRRDestroyMode(ClientPtr client)
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{
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REQUEST(xRRDestroyModeReq);
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RRModePtr mode;
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REQUEST_SIZE_MATCH(xRRDestroyModeReq);
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VERIFY_RR_MODE(stuff->mode, mode, DixDestroyAccess);
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if (!mode->userScreen)
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return BadMatch;
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if (mode->refcnt > 1)
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return BadAccess;
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FreeResource(stuff->mode, 0);
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return Success;
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}
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int
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ProcRRAddOutputMode(ClientPtr client)
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{
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REQUEST(xRRAddOutputModeReq);
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RRModePtr mode;
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RROutputPtr output;
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REQUEST_SIZE_MATCH(xRRAddOutputModeReq);
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VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
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VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
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if (RROutputIsLeased(output))
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return BadAccess;
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return RROutputAddUserMode(output, mode);
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}
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int
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ProcRRDeleteOutputMode(ClientPtr client)
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{
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REQUEST(xRRDeleteOutputModeReq);
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RRModePtr mode;
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RROutputPtr output;
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REQUEST_SIZE_MATCH(xRRDeleteOutputModeReq);
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VERIFY_RR_OUTPUT(stuff->output, output, DixReadAccess);
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VERIFY_RR_MODE(stuff->mode, mode, DixUseAccess);
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if (RROutputIsLeased(output))
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return BadAccess;
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return RROutputDeleteUserMode(output, mode);
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}
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