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Implement core protocol backing store exclusively in terms of Composite.

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Composite's automatic redirection is a more general mechanism than the
ad-hoc BS machinery, so it's much prettier to implement the one in terms
of the other.  Composite now wraps ChangeWindowAttributes and activates
automatic redirection for windows with backing store requested.  The old
backing store infrastructure is completely gutted: ABI-visible structures
retain the function pointers, but they never get called, and all the
open-coded conditionals throughout the DIX layer to implement BS are gone.

Note that this is still not a strictly complete implementation of backing
store, since Composite will throw the bits away on unmap and therefore
WhenMapped and Always hints are equivalent.
This commit is contained in:
Adam Jackson
2007-08-25 15:08:20 -04:00
parent bf0883ae50
commit ae7f71a8b3
67 changed files with 80 additions and 5959 deletions
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30
hw/xfree86/common/xf86Helper.c
View File

@@ -1114,7 +1114,7 @@ xf86SetRootClip (ScreenPtr pScreen, Bool enable)
WindowPtr pChild;
Bool WasViewable = (Bool)(pWin->viewable);
Bool anyMarked = FALSE;
RegionPtr pOldClip = NULL, bsExposed;
RegionPtr pOldClip = NULL;
#ifdef DO_SAVE_UNDERS
Bool dosave = FALSE;
#endif
@@ -1175,12 +1175,6 @@ xf86SetRootClip (ScreenPtr pScreen, Bool enable)
if (WasViewable)
{
if (pWin->backStorage)
{
pOldClip = REGION_CREATE(pScreen, NullBox, 1);
REGION_COPY(pScreen, pOldClip, &pWin->clipList);
}
if (pWin->firstChild)
{
anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin->firstChild,
@@ -1204,28 +1198,6 @@ xf86SetRootClip (ScreenPtr pScreen, Bool enable)
(*pScreen->ValidateTree)(pWin, NullWindow, VTOther);
}
if (pWin->backStorage &&
((pWin->backingStore == Always) || WasViewable))
{
if (!WasViewable)
pOldClip = &pWin->clipList; /* a convenient empty region */
bsExposed = (*pScreen->TranslateBackingStore)
(pWin, 0, 0, pOldClip,
pWin->drawable.x, pWin->drawable.y);
if (WasViewable)
REGION_DESTROY(pScreen, pOldClip);
if (bsExposed)
{
RegionPtr valExposed = NullRegion;
if (pWin->valdata)
valExposed = &pWin->valdata->after.exposed;
(*pScreen->WindowExposures) (pWin, valExposed, bsExposed);
if (valExposed)
REGION_EMPTY(pScreen, valExposed);
REGION_DESTROY(pScreen, bsExposed);
}
}
if (WasViewable)
{
if (anyMarked)