uxa: Tell the driver when we're just going to immediately map the pixmap.

This lets the driver allocate a nice idle buffer object instead of a
busy one, reducing runtime of firefox-20090601 on my G45 from 50.7 (+/- .41%)
to 48.4 (+/- 1.1%).

2 files changed, 12 insertions, 1 deletions

diff --git a/uxa/uxa-render.c b/uxa/uxa-render.c
index 02373b0b..13128ed7 100644
--- a/uxa/uxa-render.c
+++ b/uxa/uxa-render.c
@@ -822,7 +822,8 @@ uxa_create_alpha_picture (ScreenPtr     pScreen,
     }
 
     pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
-					pPictFormat->depth, 0);
+					pPictFormat->depth,
+					UXA_CREATE_PIXMAP_FOR_MAP);
     if (!pPixmap)
 	return 0;
     pPicture = CreatePicture (0, &pPixmap->drawable, pPictFormat,
diff --git a/uxa/uxa.h b/uxa/uxa.h
index 8f6f896c..d5f5b9c4 100644
--- a/uxa/uxa.h
+++ b/uxa/uxa.h
@@ -505,6 +505,16 @@ typedef struct _UxaDriver {
 
 /** @} */
 
+/** @name UXA CreatePixmap hint flags
+ * @{
+ */
+/**
+ * Flag to hint that the first operation on the pixmap will be a
+ * prepare_access.
+ */
+#define UXA_CREATE_PIXMAP_FOR_MAP	0x20000000
+/** @} */
+
 uxa_driver_t *
 uxa_driver_alloc(void);