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composite: Copy the window contents back from the pixmap

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Since extra expose events are no longer generated during window
unredirection, the window contents must be preserved by the server.
So copy the window contents back from the pixmap. The copy can only
be done after the clips have been recomputed, so delay the copy and
the pixmap destruction until ValidateTree is done. Window borders are
restored by HandleExposures and thus don't need to be copied back.

Signed-off-by: Ville Syrjälä <ville.syrjala@nokia.com>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Ville Syrjälä
2010-12-20 16:37:24 +02:00
parent 193ecc8b45
commit 74663e6152
3 changed files with 57 additions and 11 deletions
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47
composite/compalloc.c
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@@ -239,6 +239,34 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
return Success;
}
void
compRestoreWindow (WindowPtr pWin, PixmapPtr pPixmap)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
WindowPtr pParent = pWin->parent;
if (pParent->drawable.depth == pWin->drawable.depth) {
GCPtr pGC = GetScratchGC (pWin->drawable.depth, pScreen);
int bw = (int) pWin->borderWidth;
int x = bw;
int y = bw;
int w = pWin->drawable.width;
int h = pWin->drawable.height;
if (pGC) {
ChangeGCVal val;
val.val = IncludeInferiors;
ChangeGC (NullClient, pGC, GCSubwindowMode, &val);
ValidateGC(&pWin->drawable, pGC);
(*pGC->ops->CopyArea) (&pPixmap->drawable,
&pWin->drawable,
pGC,
x, y, w, h, 0, 0);
FreeScratchGC (pGC);
}
}
}
/*
* Free one of the per-client per-window resources, clearing
* redirect and the per-window pointer as appropriate
@@ -246,10 +274,12 @@ compRedirectWindow (ClientPtr pClient, WindowPtr pWin, int update)
void
compFreeClientWindow (WindowPtr pWin, XID id)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
CompWindowPtr cw = GetCompWindow (pWin);
CompClientWindowPtr ccw, *prev;
Bool anyMarked = FALSE;
WindowPtr pLayerWin;
PixmapPtr pPixmap = NULL;
if (!cw)
return;
@@ -268,8 +298,10 @@ compFreeClientWindow (WindowPtr pWin, XID id)
{
anyMarked = compMarkWindows (pWin, &pLayerWin);
if (pWin->redirectDraw != RedirectDrawNone)
compFreePixmap (pWin);
if (pWin->redirectDraw != RedirectDrawNone) {
pPixmap = (*pScreen->GetWindowPixmap) (pWin);
compSetParentPixmap (pWin);
}
if (cw->damage)
DamageDestroy (cw->damage);
@@ -290,6 +322,11 @@ compFreeClientWindow (WindowPtr pWin, XID id)
if (anyMarked)
compHandleMarkedWindows (pWin, pLayerWin);
if (pPixmap) {
compRestoreWindow (pWin, pPixmap);
(*pScreen->DestroyPixmap) (pPixmap);
}
}
/*
@@ -621,10 +658,10 @@ compAllocPixmap (WindowPtr pWin)
}
void
compFreePixmap (WindowPtr pWin)
compSetParentPixmap (WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
PixmapPtr pRedirectPixmap, pParentPixmap;
PixmapPtr pParentPixmap;
CompWindowPtr cw = GetCompWindow (pWin);
if (cw->damageRegistered)
@@ -640,11 +677,9 @@ compFreePixmap (WindowPtr pWin)
* parent exposed area; regions beyond the parent cause crashes
*/
RegionCopy(&pWin->borderClip, &cw->borderClip);
pRedirectPixmap = (*pScreen->GetWindowPixmap) (pWin);
pParentPixmap = (*pScreen->GetWindowPixmap) (pWin->parent);
pWin->redirectDraw = RedirectDrawNone;
compSetPixmap (pWin, pParentPixmap);
(*pScreen->DestroyPixmap) (pRedirectPixmap);
}
/*