diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-01-18 19:05:34 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-01-22 23:01:50 +0000 |
| commit | 934d0d0d6585eb7638c7db597c40dd821092c034 (patch) | |
| tree | 2809f3241b797800ceefe375b89ae4f0b9a6a884 /src/cairo-paginated-surface.c | |
| parent | 6b3e19aa434d159db7878b2a7fb28a026b2d1756 (diff) | |
Real zero-copy cow snapshotting
The first iteration of COW snapshotting always made an initial copy when
the snapshot was requested (and reused that copy until the surface was
modified). However, in a few circumstances we can avoid even that copy
so long as the surface is still alive and unmodified between the
snapshotting and its use. In order to do so, we need a new proxy surface
that can automatically perform the copy if the target should disappear
prior to use.
Diffstat (limited to 'src/cairo-paginated-surface.c')
| -rw-r--r-- | src/cairo-paginated-surface.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/cairo-paginated-surface.c b/src/cairo-paginated-surface.c index 80e4b72f..c6e20cc4 100644 --- a/src/cairo-paginated-surface.c +++ b/src/cairo-paginated-surface.c @@ -156,8 +156,11 @@ _cairo_paginated_surface_finish (void *abstract_surface) cairo_status_t status = CAIRO_STATUS_SUCCESS; if (surface->page_is_blank == FALSE || surface->page_num == 1) { - cairo_surface_show_page (abstract_surface); - status = cairo_surface_status (abstract_surface); + /* Bypass some of the sanity checking in cairo-surface.c, as we + * know that the surface is finished... + */ + if (surface->base.backend->show_page != NULL) + status = surface->base.backend->show_page (&surface->base); } /* XXX We want to propagate any errors from destroy(), but those are not |