static Bool
cwCreateGC(GCPtr pGC)
{
cwGCPtr pPriv = getCwGC(pGC);
ScreenPtr pScreen = pGC->pScreen;
Bool ret;
bzero(pPriv, sizeof(cwGCRec));
SCREEN_PROLOGUE(pScreen, CreateGC);
if ( (ret = (*pScreen->CreateGC)(pGC)) )
FUNC_EPILOGUE(pGC, pPriv);
SCREEN_EPILOGUE(pScreen, CreateGC, cwCreateGC);
return ret;
}
static Bool
cwCreateBackingGC(GCPtr pGC, DrawablePtr pDrawable)
{
cwGCRec *pPriv = getCwGC(pGC);
int status, x_off, y_off;
XID noexpose = xFalse;
DrawablePtr pBackingDrawable;
pBackingDrawable = cwGetBackingDrawable(pDrawable, &x_off, &y_off);
pPriv->pBackingGC = CreateGC(pBackingDrawable, GCGraphicsExposures,
&noexpose, &status, (XID)0, serverClient);
if (status != Success)
return FALSE;
pPriv->serialNumber = 0;
pPriv->stateChanges = GCAllBits;
return TRUE;
}
static void
cwValidateGC(GCPtr pGC, unsigned long stateChanges, DrawablePtr pDrawable)
{
GCPtr pBackingGC;
cwGCPtr pPriv;
DrawablePtr pBackingDrawable;
int x_off, y_off;
pPriv = (cwGCPtr) getCwGC (pGC);
FUNC_PROLOGUE(pGC, pPriv);
/*
* Must call ValidateGC to ensure pGC->pCompositeClip is valid
*/
(*pGC->funcs->ValidateGC)(pGC, stateChanges, pDrawable);
if (!cwDrawableIsRedirWindow(pDrawable)) {
cwDestroyBackingGC(pGC);
FUNC_EPILOGUE(pGC, pPriv);
return;
} else {
if (!pPriv->pBackingGC && !cwCreateBackingGC(pGC, pDrawable)) {
FUNC_EPILOGUE(pGC, pPriv);
return;
}
}
pBackingGC = pPriv->pBackingGC;
pBackingDrawable = cwGetBackingDrawable(pDrawable, &x_off, &y_off);
pPriv->stateChanges |= stateChanges;
/*
* Copy the composite clip into the backing GC if either
* the drawable clip list has changed or the client has changed
* the client clip data
*/
if (pDrawable->serialNumber != pPriv->serialNumber ||
(pPriv->stateChanges & (GCClipXOrigin|GCClipYOrigin|GCClipMask)))
{
ChangeGCVal vals[2];
RegionPtr pCompositeClip;
pCompositeClip = RegionCreate(NULL, 0);
RegionCopy(pCompositeClip, pGC->pCompositeClip);
/* Either the drawable has changed, or the clip list in the drawable has
* changed. Copy the new clip list over and set the new translated
* offset for it.
*/
(*pBackingGC->funcs->ChangeClip) (pBackingGC, CT_REGION,
(pointer) pCompositeClip, 0);
vals[0].val = x_off - pDrawable->x;
vals[1].val = y_off - pDrawable->y;
ChangeGC(NullClient, pBackingGC,
(GCClipXOrigin | GCClipYOrigin), vals);
pPriv->serialNumber = pDrawable->serialNumber;
/*
* Mask off any client clip changes to make sure
* the clip list set above remains in effect
*/
pPriv->stateChanges &= ~(GCClipXOrigin|GCClipYOrigin|GCClipMask);
}
if (pPriv->stateChanges) {
CopyGC(pGC, pBackingGC, pPriv->stateChanges);
pPriv->stateChanges = 0;
}
if ((pGC->patOrg.x + x_off) != pBackingGC->patOrg.x ||
(pGC->patOrg.y + y_off) != pBackingGC->patOrg.y)
{
ChangeGCVal vals[2];
vals[0].val = pGC->patOrg.x + x_off;
vals[1].val = pGC->patOrg.y + y_off;
ChangeGC(NullClient, pBackingGC,
(GCTileStipXOrigin | GCTileStipYOrigin), vals);
}
ValidateGC(pBackingDrawable, pBackingGC);
FUNC_EPILOGUE(pGC, pPriv);
}