diff options
Diffstat (limited to 'exa/exa_migration.c')
| -rw-r--r-- | exa/exa_migration.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/exa/exa_migration.c b/exa/exa_migration.c index 2b9dc63dd..c8e57e440 100644 --- a/exa/exa_migration.c +++ b/exa/exa_migration.c @@ -159,6 +159,10 @@ exaPixmapSave (ScreenPtr pScreen, ExaOffscreenArea *area) pPixmap->devPrivate.ptr = dst; pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER; pExaPixmap->area = NULL; + /* Mark it dirty now, to say that there is important data in the + * system-memory copy. + */ + pExaPixmap->dirty = TRUE; } static int @@ -238,6 +242,16 @@ exaMoveInPixmap (PixmapPtr pPixmap) return; } + /* If the "dirty" flag has never been set on the in-memory pixmap, then + * nothing has been written to it, so the contents are undefined and we can + * avoid the upload. + */ + if (!pExaPixmap->dirty) { + DBG_MIGRATE(("saved upload of %dx%d\n", pPixmap->drawable.width, + pPixmap->drawable.height)); + return; + } + pExaPixmap->dirty = FALSE; if (pExaScr->info->accel.UploadToScreen) |