[PATCH xserver] composite: Fix repaint of borders (v2)

[Adam Jackson]

When going from border width zero to a non-zero border width, the
Composite extension is informed via the ConfigNotify callback. The
call-chain looks like this: compConfigNotify -> compReallocPixmap ->
compSetPixmap -> TraverseTree -> compSetPixmapVisitWindow. However, at
this time, pWindow->borderWidth was not yet updated. Thus, HasBorder()
is false and the window border will not be repainted.

To fix this, thread the new bw through to the window visitor, and
inspect that rather than HasBorder(). For all the other callers the
border does not change size, so we can pass pWin->borderWidth instead.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98499
Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 composite/compalloc.c  | 6 +++---
 composite/compint.h    | 2 +-
 composite/compwindow.c | 9 ++++++---
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/composite/compalloc.c b/composite/compalloc.c
index e6a203f..05ffc7e 100644
--- a/composite/compalloc.c
+++ b/composite/compalloc.c
@@ -612,7 +612,7 @@ compAllocPixmap(WindowPtr pWin)
     else
         pWin->redirectDraw = RedirectDrawManual;
 
-    compSetPixmap(pWin, pPixmap);
+    compSetPixmap(pWin, pPixmap, bw);
     cw->oldx = COMP_ORIGIN_INVALID;
     cw->oldy = COMP_ORIGIN_INVALID;
     cw->damageRegistered = FALSE;
@@ -651,7 +651,7 @@ compSetParentPixmap(WindowPtr pWin)
     RegionCopy(&pWin->borderClip, &cw->borderClip);
     pParentPixmap = (*pScreen->GetWindowPixmap) (pWin->parent);
     pWin->redirectDraw = RedirectDrawNone;
-    compSetPixmap(pWin, pParentPixmap);
+    compSetPixmap(pWin, pParentPixmap, pWin->borderWidth);
 }
 
 /*
@@ -682,7 +682,7 @@ compReallocPixmap(WindowPtr pWin, int draw_x, int draw_y,
         if (!pNew)
             return FALSE;
         cw->pOldPixmap = pOld;
-        compSetPixmap(pWin, pNew);
+        compSetPixmap(pWin, pNew, bw);
     }
     else {
         pNew = pOld;
diff --git a/composite/compint.h b/composite/compint.h
index 09241f2..f05c2d8 100644
--- a/composite/compint.h
+++ b/composite/compint.h
@@ -274,7 +274,7 @@ void
 #endif
 
 void
- compSetPixmap(WindowPtr pWin, PixmapPtr pPixmap);
+ compSetPixmap(WindowPtr pWin, PixmapPtr pPixmap, int bw);
 
 Bool
  compCheckRedirect(WindowPtr pWin);
diff --git a/composite/compwindow.c b/composite/compwindow.c
index 344138a..bcd230c 100644
--- a/composite/compwindow.c
+++ b/composite/compwindow.c
@@ -89,6 +89,7 @@ compCheckTree(ScreenPtr pScreen)
 typedef struct _compPixmapVisit {
     WindowPtr pWindow;
     PixmapPtr pPixmap;
+    int bw;
 } CompPixmapVisitRec, *CompPixmapVisitPtr;
 
 static Bool
@@ -126,19 +127,20 @@ compSetPixmapVisitWindow(WindowPtr pWindow, void *data)
      */
     SetWinSize(pWindow);
     SetBorderSize(pWindow);
-    if (HasBorder(pWindow))
+    if (pVisit->bw)
         QueueWorkProc(compRepaintBorder, serverClient,
                       (void *) (intptr_t) pWindow->drawable.id);
     return WT_WALKCHILDREN;
 }
 
 void
-compSetPixmap(WindowPtr pWindow, PixmapPtr pPixmap)
+compSetPixmap(WindowPtr pWindow, PixmapPtr pPixmap, int bw)
 {
     CompPixmapVisitRec visitRec;
 
     visitRec.pWindow = pWindow;
     visitRec.pPixmap = pPixmap;
+    visitRec.bw = bw;
     TraverseTree(pWindow, compSetPixmapVisitWindow, (void *) &visitRec);
     compCheckTree(pWindow->drawable.pScreen);
 }
@@ -463,7 +465,8 @@ compReparentWindow(WindowPtr pWin, WindowPtr pPriorParent)
      * Reset pixmap pointers as appropriate
      */
     if (pWin->parent && pWin->redirectDraw == RedirectDrawNone)
-        compSetPixmap(pWin, (*pScreen->GetWindowPixmap) (pWin->parent));
+        compSetPixmap(pWin, (*pScreen->GetWindowPixmap) (pWin->parent),
+                      pWin->borderWidth);
     /*
      * Call down to next function
      */
-- 
2.9.3