From f98dfec79dadb70fa7bba84e7335f92b3a73dc02 Mon Sep 17 00:00:00 2001
From: Keith Packard <[email protected]>
Date: Sat, 1 Sep 2007 21:14:22 -0700
Subject: [PATCH] [COMPOSITE] Composite used for pixmap population on redirect. (Bug #7447)
compNewPixmap copies bits from the parent window to the redirected child
pixmap to populate the pixmap with reasonable data. It cannot always use
CopyArea as that only works across matching depths. Use Composite when
the depths do not match.
---
composite/compalloc.c | 73 ++++++++++++++++++++++++++++++++++++------------
composite/compint.h | 3 ++
composite/compwindow.c | 2 +
3 files changed, 59 insertions(+), 19 deletions(-)
diff --git a/composite/compalloc.c b/composite/compalloc.c
index f555411..006e808 100644
--- a/composite/compalloc.c
+++ b/composite/compalloc.c
@@ -461,7 +461,6 @@ compNewPixmap (WindowPtr pWin, int x, in
ScreenPtr pScreen = pWin->drawable.pScreen;
WindowPtr pParent = pWin->parent;
PixmapPtr pPixmap;
- GCPtr pGC;
pPixmap = (*pScreen->CreatePixmap) (pScreen, w, h, pWin->drawable.depth);
@@ -471,25 +470,63 @@ compNewPixmap (WindowPtr pWin, int x, in
pPixmap->screen_x = x;
pPixmap->screen_y = y;
- pGC = GetScratchGC (pWin->drawable.depth, pScreen);
-
- /*
- * Copy bits from the parent into the new pixmap so that it will
- * have "reasonable" contents in case for background None areas.
- */
- if (pGC)
+ if (pParent->drawable.depth == pWin->drawable.depth)
{
- XID val = IncludeInferiors;
+ GCPtr pGC = GetScratchGC (pWin->drawable.depth, pScreen);
- ValidateGC(&pPixmap->drawable, pGC);
- dixChangeGC (serverClient, pGC, GCSubwindowMode, &val, NULL);
- (*pGC->ops->CopyArea) (&pParent->drawable,
- &pPixmap->drawable,
- pGC,
- x - pParent->drawable.x,
- y - pParent->drawable.y,
- w, h, 0, 0);
- FreeScratchGC (pGC);
+ /*
+ * Copy bits from the parent into the new pixmap so that it will
+ * have "reasonable" contents in case for background None areas.
+ */
+ if (pGC)
+ {
+ XID val = IncludeInferiors;
+
+ ValidateGC(&pPixmap->drawable, pGC);
+ dixChangeGC (serverClient, pGC, GCSubwindowMode, &val, NULL);
+ (*pGC->ops->CopyArea) (&pParent->drawable,
+ &pPixmap->drawable,
+ pGC,
+ x - pParent->drawable.x,
+ y - pParent->drawable.y,
+ w, h, 0, 0);
+ FreeScratchGC (pGC);
+ }
+ }
+ else
+ {
+ PictFormatPtr pSrcFormat = compWindowFormat (pParent);
+ PictFormatPtr pDstFormat = compWindowFormat (pWin);
+ XID inferiors = IncludeInferiors;
+ int error;
+
+ PicturePtr pSrcPicture = CreatePicture (None,
+ &pParent->drawable,
+ pSrcFormat,
+ CPSubwindowMode,
+ &inferiors,
+ serverClient, &error);
+
+ PicturePtr pDstPicture = CreatePicture (None,
+ &pPixmap->drawable,
+ pDstFormat,
+ 0, 0,
+ serverClient, &error);
+
+ if (pSrcPicture && pDstPicture)
+ {
+ CompositePicture (PictOpSrc,
+ pSrcPicture,
+ NULL,
+ pDstPicture,
+ x - pParent->drawable.x,
+ y - pParent->drawable.y,
+ 0, 0, 0, 0, w, h);
+ }
+ if (pSrcPicture)
+ FreePicture (pSrcPicture, 0);
+ if (pDstPicture)
+ FreePicture (pDstPicture, 0);
}
return pPixmap;
}
diff --git a/composite/compint.h b/composite/compint.h
index 38b1777..f69595c 100644
--- a/composite/compint.h
+++ b/composite/compint.h
@@ -237,6 +237,9 @@ #else
#define compCheckTree(s)
#endif
+PictFormatPtr
+compWindowFormat (WindowPtr pWin);
+
void
compSetPixmap (WindowPtr pWin, PixmapPtr pPixmap);
diff --git a/composite/compwindow.c b/composite/compwindow.c
index a4c4e6f..bfd2946 100644
--- a/composite/compwindow.c
+++ b/composite/compwindow.c
@@ -685,7 +685,7 @@ compGetWindowVisual (WindowPtr pWin)
return 0;
}
-static PictFormatPtr
+PictFormatPtr
compWindowFormat (WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
--
1.4.1