/*
* 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"
#include "swaprep.h"
RESTYPE RRCrtcType;
/*
* Notify the CRTC of some change
*/
void
RRCrtcChanged (RRCrtcPtr crtc, Bool layoutChanged)
{
ScreenPtr pScreen = crtc->pScreen;
crtc->changed = TRUE;
if (pScreen)
{
rrScrPriv(pScreen);
pScrPriv->changed = TRUE;
/*
* Send ConfigureNotify on any layout change
*/
if (layoutChanged)
pScrPriv->layoutChanged = TRUE;
}
}
/*
* Create a CRTC
*/
RRCrtcPtr
RRCrtcCreate (ScreenPtr pScreen, void *devPrivate)
{
RRCrtcPtr crtc;
RRCrtcPtr *crtcs;
rrScrPrivPtr pScrPriv;
if (!RRInit())
return NULL;
pScrPriv = rrGetScrPriv(pScreen);
/* make space for the crtc pointer */
if (pScrPriv->numCrtcs)
crtcs = xrealloc (pScrPriv->crtcs,
(pScrPriv->numCrtcs + 1) * sizeof (RRCrtcPtr));
else
crtcs = xalloc (sizeof (RRCrtcPtr));
if (!crtcs)
return FALSE;
pScrPriv->crtcs = crtcs;
crtc = xalloc (sizeof (RRCrtcRec));
if (!crtc)
return NULL;
crtc->id = FakeClientID (0);
crtc->pScreen = pScreen;
crtc->mode = NULL;
crtc->x = 0;
crtc->y = 0;
crtc->rotation = RR_Rotate_0;
crtc->rotations = RR_Rotate_0;
crtc->outputs = NULL;
crtc->numOutputs = 0;
crtc->gammaSize = 0;
crtc->gammaRed = crtc->gammaBlue = crtc->gammaGreen = NULL;
crtc->changed = FALSE;
crtc->devPrivate = devPrivate;
if (!AddResource (crtc->id, RRCrtcType, (pointer) crtc))
return NULL;
/* attach the screen and crtc together */
crtc->pScreen = pScreen;
pScrPriv->crtcs[pScrPriv->numCrtcs++] = crtc;
return crtc;
}
/*
* Set the allowed rotations on a CRTC
*/
void
RRCrtcSetRotations (RRCrtcPtr crtc, Rotation rotations)
{
crtc->rotations = rotations;
}
/*
* Notify the extension that the Crtc has been reconfigured,
* the driver calls this whenever it has updated the mode
*/
Bool
RRCrtcNotify (RRCrtcPtr crtc,
RRModePtr mode,
int x,
int y,
Rotation rotation,
int numOutputs,
RROutputPtr *outputs)
{
int i, j;
/*
* Check to see if any of the new outputs were
* not in the old list and mark them as changed
*/
for (i = 0; i < numOutputs; i++)
{
for (j = 0; j < crtc->numOutputs; j++)
if (outputs[i] == crtc->outputs[j])
break;
if (j == crtc->numOutputs)
{
outputs[i]->crtc = crtc;
RROutputChanged (outputs[i], FALSE);
RRCrtcChanged (crtc, FALSE);
}
}
/*
* Check to see if any of the old outputs are
* not in the new list and mark them as changed
*/
for (j = 0; j < crtc->numOutputs; j++)
{
for (i = 0; i < numOutputs; i++)
if (outputs[i] == crtc->outputs[j])
break;
if (i == numOutputs)
{
crtc->outputs[j]->crtc = NULL;
RROutputChanged (crtc->outputs[j], FALSE);
RRCrtcChanged (crtc, FALSE);
}
}
/*
* Reallocate the crtc output array if necessary
*/
if (numOutputs != crtc->numOutputs)
{
RROutputPtr *newoutputs;
if (numOutputs)
{
if (crtc->numOutputs)
newoutputs = xrealloc (crtc->outputs,
numOutputs * sizeof (RROutputPtr));
else
newoutputs = xalloc (numOutputs * sizeof (RROutputPtr));
if (!newoutputs)
return FALSE;
}
else
{
if (crtc->outputs)
xfree (crtc->outputs);
newoutputs = NULL;
}
crtc->outputs = newoutputs;
crtc->numOutputs = numOutputs;
}
/*
* Copy the new list of outputs into the crtc
*/
memcpy (crtc->outputs, outputs, numOutputs * sizeof (RROutputPtr));
/*
* Update remaining crtc fields
*/
if (mode != crtc->mode)
{
if (crtc->mode)
RRModeDestroy (crtc->mode);
crtc->mode = mode;
if (mode != NULL)
mode->refcnt++;
RRCrtcChanged (crtc, TRUE);
}
if (x != crtc->x)
{
crtc->x = x;
RRCrtcChanged (crtc, TRUE);
}
if (y != crtc->y)
{
crtc->y = y;
RRCrtcChanged (crtc, TRUE);
}
if (rotation != crtc->rotation)
{
crtc->rotation = rotation;
RRCrtcChanged (crtc, TRUE);
}
return TRUE;
}
void
RRDeliverCrtcEvent (ClientPtr client, WindowPtr pWin, RRCrtcPtr crtc)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
rrScrPriv (pScreen);
xRRCrtcChangeNotifyEvent ce;
RRModePtr mode = crtc->mode;
ce.type = RRNotify + RREventBase;
ce.subCode = RRNotify_CrtcChange;
ce.sequenceNumber = client->sequence;
ce.timestamp = pScrPriv->lastSetTime.milliseconds;
ce.window = pWin->drawable.id;
ce.crtc = crtc->id;
ce.rotation = crtc->rotation;
if (mode)
{
ce.mode = mode->mode.id;
ce.x = crtc->x;
ce.y = crtc->y;
ce.width = mode->mode.width;
ce.height = mode->mode.height;
}
else
{
ce.mode = None;
ce.x = 0;
ce.y = 0;
ce.width = 0;
ce.height = 0;
}
WriteEventsToClient (client, 1, (xEvent *) &ce);
}
static Bool
RRCrtcPendingProperties (RRCrtcPtr crtc)
{
ScreenPtr pScreen = crtc->pScreen;
rrScrPriv(pScreen);
int o;
for (o = 0; o < pScrPriv->numOutputs; o++)
{
RROutputPtr output = pScrPriv->outputs[o];
if (output->crtc == crtc && output->pendingProperties)
return TRUE;
}
return FALSE;
}
/*
* Request that the Crtc be reconfigured
*/
Bool
RRCrtcSet (RRCrtcPtr crtc,
RRModePtr mode,
int x,
int y,
Rotation rotation,
int numOutputs,
RROutputPtr *outputs)
{
ScreenPtr pScreen = crtc->pScreen;
Bool ret = FALSE;
rrScrPriv(pScreen);
/* See if nothing changed */
if (crtc->mode == mode &&
crtc->x == x &&
crtc->y == y &&
crtc->rotation == rotation &&
crtc->numOutputs == numOutputs &&
!memcmp (crtc->outputs, outputs, numOutputs * sizeof (RROutputPtr)) &&
!RRCrtcPendingProperties (crtc))
{
ret = TRUE;
}
else
{
#if RANDR_12_INTERFACE
if (pScrPriv->rrCrtcSet)
{
ret = (*pScrPriv->rrCrtcSet) (pScreen, crtc, mode, x, y,
rotation, numOutputs, outputs);
}
else
#endif
{
#if RANDR_10_INTERFACE
if (pScrPriv->rrSetConfig)
{
RRScreenSize size;
RRScreenRate rate;
if (!mode)
{
RRCrtcNotify (crtc, NULL, x, y, rotation, 0, NULL);
ret = TRUE;
}
else
{
size.width = mode->mode.width;
size.height = mode->mode.height;
if (outputs[0]->mmWidth && outputs[0]->mmHeight)
{
size.mmWidth = outputs[0]->mmWidth;
size.mmHeight = outputs[0]->mmHeight;
}
else
{
size.mmWidth = pScreen->mmWidth;
size.mmHeight = pScreen->mmHeight;
}
size.nRates = 1;
rate.rate = RRVerticalRefresh (&mode->mode);
size.pRates = &rate;
ret = (*pScrPriv->rrSetConfig) (pScreen, rotation, rate.rate, &size);
/*
* Old 1.0 interface tied screen size to mode size
*/
if (ret)
{
RRCrtcNotify (crtc, mode, x, y, rotation, 1, outputs);
RRScreenSizeNotify (pScreen);
}
}
}
#endif
}
if (ret)
{
int o;
RRTellChanged (pScreen);
for (o = 0; o < numOutputs; o++)
RRPostPendingProperties (outputs[o]);
}
}
return ret;
}
/*
* Destroy a Crtc at shutdown
*/
void
RRCrtcDestroy (RRCrtcPtr crtc)
{
FreeResource (crtc->id, 0);
}
static int
RRCrtcDestroyResource (pointer value, XID pid)
{
RRCrtcPtr crtc = (RRCrtcPtr) value;
ScreenPtr pScreen = crtc->pScreen;
if (pScreen)
{
rrScrPriv(pScreen);
int i;
for (i = 0; i < pScrPriv->numCrtcs; i++)
{
if (pScrPriv->crtcs[i] == crtc)
{
memmove (pScrPriv->crtcs + i, pScrPriv->crtcs + i + 1,
(pScrPriv->numCrtcs - (i + 1)) * sizeof (RRCrtcPtr));
--pScrPriv->numCrtcs;
break;
}
}
}
if (crtc->gammaRed)
xfree (crtc->gammaRed);
if (crtc->mode)
RRModeDestroy (crtc->mode);
xfree (crtc);
return 1;
}
/*
* Request that the Crtc gamma be changed
*/
Bool
RRCrtcGammaSet (RRCrtcPtr crtc,
CARD16 *red,
CARD16 *green,
CARD16 *blue)
{
Bool ret = TRUE;
#if RANDR_12_INTERFACE
ScreenPtr pScreen = crtc->pScreen;
#endif
memcpy (crtc->gammaRed, red, crtc->gammaSize * sizeof (CARD16));
memcpy (crtc->gammaGreen, green, crtc->gammaSize * sizeof (CARD16));
memcpy (crtc->gammaBlue, blue, crtc->gammaSize * sizeof (CARD16));
#if RANDR_12_INTERFACE
if (pScreen)
{
rrScrPriv(pScreen);
if (pScrPriv->rrCrtcSetGamma)
ret = (*pScrPriv->rrCrtcSetGamma) (pScreen, crtc);
}
#endif
return ret;
}
/*
* Notify the extension that the Crtc gamma has been changed
* The driver calls this whenever it has changed the gamma values
* in the RRCrtcRec
*/
Bool
RRCrtcGammaNotify (RRCrtcPtr crtc)
{
return TRUE; /* not much going on here */
}
/**
* Returns the width/height that the crtc scans out from the framebuffer
*/
void
RRCrtcGetScanoutSize(RRCrtcPtr crtc, int *width, int *height)
{
if (crtc->mode == NULL) {
*width = 0;
*height = 0;
return;
}
switch (crtc->rotation & 0xf) {
case RR_Rotate_0:
case RR_Rotate_180:
*width = crtc->mode->mode.width;
*height = crtc->mode->mode.height;
break;
case RR_Rotate_90:
case RR_Rotate_270:
*width = crtc->mode->mode.height;
*height = crtc->mode->mode.width;
break;
}
}
/*
* Set the size of the gamma table at server startup time
*/
Bool
RRCrtcGammaSetSize (RRCrtcPtr crtc,
int size)
{
CARD16 *gamma;
if (size == crtc->gammaSize)
return TRUE;
if (size)
{
gamma = xalloc (size * 3 * sizeof (CARD16));
if (!gamma)
return FALSE;
}
else
gamma = NULL;
if (crtc->gammaRed)
xfree (crtc->gammaRed);
crtc->gammaRed = gamma;
crtc->gammaGreen = gamma + size;
crtc->gammaBlue = gamma + size*2;
crtc->gammaSize = size;
return TRUE;
}
/*
* Initialize crtc type
*/
Bool
RRCrtcInit (void)
{
RRCrtcType = CreateNewResourceType (RRCrtcDestroyResource);
if (!RRCrtcType)
return FALSE;
#ifdef XResExtension
RegisterResourceName (RRCrtcType, "CRTC");
#endif
return TRUE;
}
int
ProcRRGetCrtcInfo (ClientPtr client)
{
REQUEST(xRRGetCrtcInfoReq);
xRRGetCrtcInfoReply rep;
RRCrtcPtr crtc;
CARD8 *extra;
unsigned long extraLen;
ScreenPtr pScreen;
rrScrPrivPtr pScrPriv;
RRModePtr mode;
RROutput *outputs;
RROutput *possible;
int i, j, k, n;
int width, height;
REQUEST_SIZE_MATCH(xRRGetCrtcInfoReq);
crtc = LookupCrtc(client, stuff->crtc, DixReadAccess);
if (!crtc)
return RRErrorBase + BadRRCrtc;
/* All crtcs must be associated with screens before client
* requests are processed
*/
pScreen = crtc->pScreen;
pScrPriv = rrGetScrPriv(pScreen);
mode = crtc->mode;
rep.type = X_Reply;
rep.status = RRSetConfigSuccess;
rep.sequenceNumber = client->sequence;
rep.length = 0;
rep.timestamp = pScrPriv->lastSetTime.milliseconds;
rep.x = crtc->x;
rep.y = crtc->y;
RRCrtcGetScanoutSize (crtc, &width, &height);
rep.width = width;
rep.height = height;
rep.mode = mode ? mode->mode.id : 0;
rep.rotation = crtc->rotation;
rep.rotations = crtc->rotations;
rep.nOutput = crtc->numOutputs;
k = 0;
for (i = 0; i < pScrPriv->numOutputs; i++)
for (j = 0; j < pScrPriv->outputs[i]->numCrtcs; j++)
if (pScrPriv->outputs[i]->crtcs[j] == crtc)
k++;
rep.nPossibleOutput = k;
rep.length = rep.nOutput + rep.nPossibleOutput;
extraLen = rep.length << 2;
if (extraLen)
{
extra = xalloc (extraLen);
if (!extra)
return BadAlloc;
}
else
extra = NULL;
outputs = (RROutput *) extra;
possible = (RROutput *) (outputs + rep.nOutput);
for (i = 0; i < crtc->numOutputs; i++)
{
outputs[i] = crtc->outputs[i]->id;
if (client->swapped)
swapl (&outputs[i], n);
}
k = 0;
for (i = 0; i < pScrPriv->numOutputs; i++)
for (j = 0; j < pScrPriv->outputs[i]->numCrtcs; j++)
if (pScrPriv->outputs[i]->crtcs[j] == crtc)
{
possible[k] = pScrPriv->outputs[i]->id;
if (client->swapped)
swapl (&possible[k], n);
k++;
}
if (client->swapped) {
swaps(&rep.sequenceNumber, n);
swapl(&rep.length, n);
swapl(&rep.timestamp, n);
swaps(&rep.x, n);
swaps(&rep.y, n);
swaps(&rep.width, n);
swaps(&rep.height, n);
swapl(&rep.mode, n);
swaps(&rep.rotation, n);
swaps(&rep.rotations, n);
swaps(&rep.nOutput, n);
swaps(&rep.nPossibleOutput, n);
}
WriteToClient(client, sizeof(xRRGetCrtcInfoReply), (char *)&rep);
if (extraLen)
{
WriteToClient (client, extraLen, (char *) extra);
xfree (extra);
}
return client->noClientException;
}
int
ProcRRSetCrtcConfig (ClientPtr client)
{
REQUEST(xRRSetCrtcConfigReq);
xRRSetCrtcConfigReply rep;
ScreenPtr pScreen;
rrScrPrivPtr pScrPriv;
RRCrtcPtr crtc;
RRModePtr mode;
int numOutputs;
RROutputPtr *outputs = NULL;
RROutput *outputIds;
TimeStamp configTime;
TimeStamp time;
Rotation rotation;
int i, j;
REQUEST_AT_LEAST_SIZE(xRRSetCrtcConfigReq);
numOutputs = (stuff->length - (SIZEOF (xRRSetCrtcConfigReq) >> 2));
crtc = LookupIDByType (stuff->crtc, RRCrtcType);
if (!crtc)
{
client->errorValue = stuff->crtc;
return RRErrorBase + BadRRCrtc;
}
if (stuff->mode == None)
{
mode = NULL;
if (numOutputs > 0)
return BadMatch;
}
else
{
mode = LookupIDByType (stuff->mode, RRModeType);
if (!mode)
{
client->errorValue = stuff->mode;
return RRErrorBase + BadRRMode;
}
if (numOutputs == 0)
return BadMatch;
}
if (numOutputs)
{
outputs = xalloc (numOutputs * sizeof (RROutputPtr));
if (!outputs)
return BadAlloc;
}
else
outputs = NULL;
outputIds = (RROutput *) (stuff + 1);
for (i = 0; i < numOutputs; i++)
{
outputs[i] = (RROutputPtr) LookupIDByType (outputIds[i], RROutputType);
if (!outputs[i])
{
client->errorValue = outputIds[i];
if (outputs)
xfree (outputs);
return RRErrorBase + BadRROutput;
}
/* validate crtc for this output */
for (j = 0; j < outputs[i]->numCrtcs; j++)
if (outputs[i]->crtcs[j] == crtc)
break;
if (j == outputs[i]->numCrtcs)
{
if (outputs)
xfree (outputs);
return BadMatch;
}
/* validate mode for this output */
for (j = 0; j < outputs[i]->numModes + outputs[i]->numUserModes; j++)
{
RRModePtr m = (j < outputs[i]->numModes ?
outputs[i]->modes[j] :
outputs[i]->userModes[j - outputs[i]->numModes]);
if (m == mode)
break;
}
if (j == outputs[i]->numModes + outputs[i]->numUserModes)
{
if (outputs)
xfree (outputs);
return BadMatch;
}
}
/* validate clones */
for (i = 0; i < numOutputs; i++)
{
for (j = 0; j < numOutputs; j++)
{
int k;
if (i == j)
continue;
for (k = 0; k < outputs[i]->numClones; k++)
{
if (outputs[i]->clones[k] == outputs[j])
break;
}
if (k == outputs[i]->numClones)
{
if (outputs)
xfree (outputs);
return BadMatch;
}
}
}
pScreen = crtc->pScreen;
pScrPriv = rrGetScrPriv(pScreen);
time = ClientTimeToServerTime(stuff->timestamp);
configTime = ClientTimeToServerTime(stuff->configTimestamp);
if (!pScrPriv)
{
time = currentTime;
rep.status = RRSetConfigFailed;
goto sendReply;
}
#if 0
/*
* if the client's config timestamp is not the same as the last config
* timestamp, then the config information isn't up-to-date and
* can't even be validated
*/
if (CompareTimeStamps (configTime, pScrPriv->lastConfigTime) != 0)
{
rep.status = RRSetConfigInvalidConfigTime;
goto sendReply;
}
#endif
/*
* Validate requested rotation
*/
rotation = (Rotation) stuff->rotation;
/* test the rotation bits only! */
switch (rotation & 0xf) {
case RR_Rotate_0:
case RR_Rotate_90:
case RR_Rotate_180:
case RR_Rotate_270:
break;
default:
/*
* Invalid rotation
*/
client->errorValue = stuff->rotation;
if (outputs)
xfree (outputs);
return BadValue;
}
if (mode)
{
if ((~crtc->rotations) & rotation)
{
/*
* requested rotation or reflection not supported by screen
*/
client->errorValue = stuff->rotation;
if (outputs)
xfree (outputs);
return BadMatch;
}
#ifdef RANDR_12_INTERFACE
/*
* Check screen size bounds if the DDX provides a 1.2 interface
* for setting screen size. Else, assume the CrtcSet sets
* the size along with the mode
*/
if (pScrPriv->rrScreenSetSize)
{
int source_width = mode->mode.width;
int source_height = mode->mode.height;
if ((rotation & 0xf) == RR_Rotate_90 || (rotation & 0xf) == RR_Rotate_270)
{
source_width = mode->mode.height;
source_height = mode->mode.width;
}
if (stuff->x + source_width > pScreen->width)
{
client->errorValue = stuff->x;
if (outputs)
xfree (outputs);
return BadValue;
}
if (stuff->y + source_height > pScreen->height)
{
client->errorValue = stuff->y;
if (outputs)
xfree (outputs);
return BadValue;
}
}
#endif
}
/*
* Make sure the requested set-time is not older than
* the last set-time
*/
if (CompareTimeStamps (time, pScrPriv->lastSetTime) < 0)
{
rep.status = RRSetConfigInvalidTime;
goto sendReply;
}
if (!RRCrtcSet (crtc, mode, stuff->x, stuff->y,
rotation, numOutputs, outputs))
{
rep.status = RRSetConfigFailed;
goto sendReply;
}
rep.status = RRSetConfigSuccess;
sendReply:
if (outputs)
xfree (outputs);
rep.type = X_Reply;
/* rep.status has already been filled in */
rep.length = 0;
rep.sequenceNumber = client->sequence;
rep.newTimestamp = pScrPriv->lastConfigTime.milliseconds;
if (client->swapped)
{
int n;
swaps(&rep.sequenceNumber, n);
swapl(&rep.length, n);
swapl(&rep.newTimestamp, n);
}
WriteToClient(client, sizeof(xRRSetCrtcConfigReply), (char *)&rep);
return client->noClientException;
}
int
ProcRRGetCrtcGammaSize (ClientPtr client)
{
REQUEST(xRRGetCrtcGammaSizeReq);
xRRGetCrtcGammaSizeReply reply;
RRCrtcPtr crtc;
int n;
REQUEST_SIZE_MATCH(xRRGetCrtcGammaSizeReq);
crtc = LookupCrtc (client, stuff->crtc, DixReadAccess);
if (!crtc)
return RRErrorBase + BadRRCrtc;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = 0;
reply.size = crtc->gammaSize;
if (client->swapped) {
swaps (&reply.sequenceNumber, n);
swapl (&reply.length, n);
swaps (&reply.size, n);
}
WriteToClient (client, sizeof (xRRGetCrtcGammaSizeReply), (char *) &reply);
return client->noClientException;
}
int
ProcRRGetCrtcGamma (ClientPtr client)
{
REQUEST(xRRGetCrtcGammaReq);
xRRGetCrtcGammaReply reply;
RRCrtcPtr crtc;
int n;
unsigned long len;
REQUEST_SIZE_MATCH(xRRGetCrtcGammaReq);
crtc = LookupCrtc (client, stuff->crtc, DixReadAccess);
if (!crtc)
return RRErrorBase + BadRRCrtc;
len = crtc->gammaSize * 3 * 2;
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = (len + 3) >> 2;
reply.size = crtc->gammaSize;
if (client->swapped) {
swaps (&reply.sequenceNumber, n);
swapl (&reply.length, n);
swaps (&reply.size, n);
}
WriteToClient (client, sizeof (xRRGetCrtcGammaReply), (char *) &reply);
if (crtc->gammaSize)
{
client->pSwapReplyFunc = (ReplySwapPtr)CopySwap16Write;
WriteSwappedDataToClient (client, len, (char *) crtc->gammaRed);
}
return client->noClientException;
}
int
ProcRRSetCrtcGamma (ClientPtr client)
{
REQUEST(xRRSetCrtcGammaReq);
RRCrtcPtr crtc;
unsigned long len;
CARD16 *red, *green, *blue;
REQUEST_AT_LEAST_SIZE(xRRSetCrtcGammaReq);
crtc = LookupCrtc (client, stuff->crtc, DixWriteAccess);
if (!crtc)
return RRErrorBase + BadRRCrtc;
len = client->req_len - (sizeof (xRRSetCrtcGammaReq) >> 2);
if (len < (stuff->size * 3 + 1) >> 1)
return BadLength;
if (stuff->size != crtc->gammaSize)
return BadMatch;
red = (CARD16 *) (stuff + 1);
green = red + crtc->gammaSize;
blue = green + crtc->gammaSize;
RRCrtcGammaSet (crtc, red, green, blue);
return Success;
}
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