[PATCH] EXA: ModifyPixmapHeader_mixed fixes.

[Michel Dänzer]

From: Michel Dänzer <daenzer at vmware.com>

* Better detection of dimension changes.
* Make sure to re-create the system memory copy when the pixmap dimensions
  change (e.g. the screen pixmap on screen resize).
* Clear the valid regions.

Signed-off-by: Michel Dänzer <daenzer at vmware.com>
---
 exa/exa_mixed.c |   43 ++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/exa/exa_mixed.c b/exa/exa_mixed.c
index 764c7dd..0fb644b 100644
--- a/exa/exa_mixed.c
+++ b/exa/exa_mixed.c
@@ -135,17 +135,54 @@ exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
 	pExaPixmap->score = EXA_PIXMAP_SCORE_PINNED;
     }
 
-    if (pExaPixmap->driverPriv) {
-        if (width > 0 && height > 0 && bitsPerPixel > 0) {
+    has_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
+
+    if (width <= 0)
+	width = pPixmap->drawable.width;
+
+    if (height <= 0)
+	height = pPixmap->drawable.height;
+
+    if (bitsPerPixel <= 0) {
+	if (depth <= 0)
+	    bitsPerPixel = pPixmap->drawable.bitsPerPixel;
+	else
+	    bitsPerPixel = BitsPerPixel(depth);
+    }
+
+    if (depth <= 0)
+	depth = pPixmap->drawable.depth;
+
+    if (width != pPixmap->drawable.width ||
+	height != pPixmap->drawable.height ||
+	devKind != pPixmap->devKind ||
+	depth != pPixmap->drawable.depth ||
+	bitsPerPixel != pPixmap->drawable.bitsPerPixel) {
+	if (pExaPixmap->driverPriv) {
             exaSetFbPitch(pExaScr, pExaPixmap,
                           width, height, bitsPerPixel);
 
             exaSetAccelBlock(pExaScr, pExaPixmap,
                              width, height, bitsPerPixel);
+            REGION_EMPTY(pScreen, &pExaPixmap->validFB);
         }
+
+	/* Need to re-create system copy if there's also a GPU copy */
+	if (has_gpu_copy && pExaPixmap->sys_ptr) {
+	    free(pExaPixmap->sys_ptr);
+	    pExaPixmap->sys_ptr = NULL;
+	    pExaPixmap->sys_pitch = devKind > 0 ? devKind :
+	        PixmapBytePad(width, depth);
+	    DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+	    DamageDestroy(pExaPixmap->pDamage);
+	    pExaPixmap->pDamage = NULL;
+	    REGION_EMPTY(pScreen, &pExaPixmap->validSys);
+
+	    if (pExaScr->deferred_mixed_pixmap == pPixmap)
+		pExaScr->deferred_mixed_pixmap = NULL;
+	}
     }
 
-    has_gpu_copy = exaPixmapHasGpuCopy(pPixmap);
     if (has_gpu_copy) {
 	pPixmap->devPrivate.ptr = pExaPixmap->fb_ptr;
 	pPixmap->devKind = pExaPixmap->fb_pitch;
-- 
1.6.4.3