composite: Wrap GetSpans

GetSpans should flush composition from children to parent, just like
GetImage and SourceValidate.  Fortunately no one is likely to have
noticed, since to hit this you're already deep into failure town.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/composite/compinit.c b/composite/compinit.c
index 111c16e5d..10433a1f7 100644
--- a/composite/compinit.c
+++ b/composite/compinit.c
@@ -78,6 +78,7 @@ compCloseScreen(ScreenPtr pScreen)
     pScreen->PositionWindow = cs->PositionWindow;
 
     pScreen->GetImage = cs->GetImage;
+    pScreen->GetSpans = cs->GetSpans;
     pScreen->SourceValidate = cs->SourceValidate;
 
     free(cs);
@@ -151,6 +152,21 @@ compGetImage(DrawablePtr pDrawable,
 }
 
 static void
+compGetSpans(DrawablePtr pDrawable, int wMax, DDXPointPtr ppt, int *pwidth,
+             int nspans, char *pdstStart)
+{
+    ScreenPtr pScreen = pDrawable->pScreen;
+    CompScreenPtr cs = GetCompScreen(pScreen);
+
+    pScreen->GetSpans = cs->GetSpans;
+    if (pDrawable->type == DRAWABLE_WINDOW)
+        compPaintChildrenToWindow((WindowPtr) pDrawable);
+    (*pScreen->GetSpans) (pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
+    cs->GetSpans = pScreen->GetSpans;
+    pScreen->GetSpans = compGetSpans;
+}
+
+static void
 compSourceValidate(DrawablePtr pDrawable,
                    int x, int y,
                    int width, int height, unsigned int subWindowMode)
@@ -432,6 +448,9 @@ compScreenInit(ScreenPtr pScreen)
     cs->GetImage = pScreen->GetImage;
     pScreen->GetImage = compGetImage;
 
+    cs->GetSpans = pScreen->GetSpans;
+    pScreen->GetSpans = compGetSpans;
+
     cs->SourceValidate = pScreen->SourceValidate;
     pScreen->SourceValidate = compSourceValidate;
 
diff --git a/composite/compint.h b/composite/compint.h
index 56b76c540..f06b846cb 100644
--- a/composite/compint.h
+++ b/composite/compint.h
@@ -168,6 +168,7 @@ typedef struct _CompScreen {
     CompOverlayClientPtr pOverlayClients;
 
     GetImageProcPtr GetImage;
+    GetSpansProcPtr GetSpans;
     SourceValidateProcPtr SourceValidate;
 } CompScreenRec, *CompScreenPtr;