Move libcw setup to the only renderer requiring it (XAA).

Additionally, protect libcw setup behind checks for Render, to avoid
segfaulting if Render isn't available (xnest).

The previous setup was an ABI-preserving dance, which is better nuked now.
Now, anything that needs libcw must explicitly initialize it, and
miDisableCompositeWrapper (previously only called by EXA and presumably binary
drivers) is gone.

2 files changed, 10 insertions, 18 deletions

diff --git a/miext/cw/cw.c b/miext/cw/cw.c
index f60f8cf28..69502711a 100644
--- a/miext/cw/cw.c
+++ b/miext/cw/cw.c
@@ -50,7 +50,6 @@ int cwWindowIndex;
 #ifdef RENDER
 int cwPictureIndex;
 #endif
-static Bool cwDisabled[MAXSCREENS];
 static unsigned long cwGeneration = 0;
 extern GCOps cwGCOps;
 
@@ -619,9 +618,9 @@ void
 miInitializeCompositeWrapper(ScreenPtr pScreen)
 {
     cwScreenPtr pScreenPriv;
-
-    if (cwDisabled[pScreen->myNum])
-	return;
+#ifdef RENDER
+    Bool has_render = GetPictureScreenIfSet(pScreen) != NULL;
+#endif
 
     if (cwGeneration != serverGeneration)
     {
@@ -631,7 +630,8 @@ miInitializeCompositeWrapper(ScreenPtr pScreen)
 	cwGCIndex = AllocateGCPrivateIndex();
 	cwWindowIndex = AllocateWindowPrivateIndex();
 #ifdef RENDER
-	cwPictureIndex = AllocatePicturePrivateIndex();
+	if (has_render)
+	    cwPictureIndex = AllocatePicturePrivateIndex();
 #endif
 	cwGeneration = serverGeneration;
     }
@@ -640,8 +640,10 @@ miInitializeCompositeWrapper(ScreenPtr pScreen)
     if (!AllocateWindowPrivate(pScreen, cwWindowIndex, 0))
 	return;
 #ifdef RENDER
-    if (!AllocatePicturePrivate(pScreen, cwPictureIndex, 0))
-	return;
+    if (has_render) {
+	if (!AllocatePicturePrivate(pScreen, cwPictureIndex, 0))
+	    return;
+    }
 #endif
     pScreenPriv = (cwScreenPtr)xalloc(sizeof(cwScreenRec));
     if (!pScreenPriv)
@@ -661,17 +663,11 @@ miInitializeCompositeWrapper(ScreenPtr pScreen)
     SCREEN_EPILOGUE(pScreen, GetWindowPixmap, cwGetWindowPixmap);
 
 #ifdef RENDER
-    if (GetPictureScreen (pScreen))
+    if (has_render)
 	cwInitializeRender(pScreen);
 #endif
 }
 
-_X_EXPORT void
-miDisableCompositeWrapper(ScreenPtr pScreen)
-{
-    cwDisabled[pScreen->myNum] = TRUE;
-}
-
 static Bool
 cwCloseScreen (int i, ScreenPtr pScreen)
 {
diff --git a/miext/cw/cw.h b/miext/cw/cw.h
index 09cfc7828..69abbbfed 100644
--- a/miext/cw/cw.h
+++ b/miext/cw/cw.h
@@ -169,7 +169,3 @@ cwFiniRender (ScreenPtr pScreen);
 
 void
 miInitializeCompositeWrapper(ScreenPtr pScreen);
-
-/* Must be called before miInitializeCompositeWrapper */
-void
-miDisableCompositeWrapper(ScreenPtr pScreen);