371 lines
8.7 KiB
C
371 lines
8.7 KiB
C
/*
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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) return FALSE;
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if (a->height != b->height) return FALSE;
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if (a->dotClock != b->dotClock) return FALSE;
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if (a->hSyncStart != b->hSyncStart) return FALSE;
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if (a->hSyncEnd != b->hSyncEnd) return FALSE;
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if (a->hTotal != b->hTotal) return FALSE;
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if (a->hSkew != b->hSkew) return FALSE;
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if (a->vSyncStart != b->vSyncStart) return FALSE;
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if (a->vSyncEnd != b->vSyncEnd) return FALSE;
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if (a->vTotal != b->vTotal) return FALSE;
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if (a->nameLength != b->nameLength) return FALSE;
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if (a->modeFlags != b->modeFlags) 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,
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const char *name,
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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 = realloc(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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{
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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, (pointer) mode))
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return NULL;
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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,
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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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{
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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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{
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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,
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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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{
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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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{
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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,
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const char *name,
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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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{
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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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{
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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 = malloc((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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{
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RROutputPtr output = pScrPriv->outputs[o];
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int m, n;
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for (m = 0; m < output->numModes + output->numUserModes; m++)
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{
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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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{
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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) 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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{
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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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{
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if (modes[m] == mode)
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{
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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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{
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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 (pointer 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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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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SetResourceTypeErrorValue(RRModeType, RRErrorBase + BadRRMode);
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return TRUE;
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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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rrScrPrivPtr pScrPriv;
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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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pScrPriv = rrGetScrPriv(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.type = X_Reply;
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rep.pad0 = 0;
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rep.sequenceNumber = client->sequence;
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rep.length = 0;
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rep.mode = mode->mode.id;
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if (client->swapped)
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{
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int n;
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swaps(&rep.sequenceNumber, n);
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swapl(&rep.length, n);
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swapl(&rep.mode, n);
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}
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WriteToClient(client, sizeof(xRRCreateModeReply), (char *)&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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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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return RROutputDeleteUserMode (output, mode);
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}
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