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compositor: clarify update_transform vs. repaint

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Remove redundant weston_surface_update_transform() calls from within
output repaint paths, and add a comment that we need to rely on
surface->geometry.dirty == 0 within the repaint sub-functions.

Now that weston_surface_update_transform() does damage as needed, and
weston_output_repaint() explicitly calls update_transform, we can reduce
the updates in rotate_grab_motion() to simply scheduling a repaint. This
will guarantee that the change in rotation ends up on screen ASAP.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
This commit is contained in:
Pekka Paalanen 2012-02-09 15:58:44 +02:00
parent 9651678070
commit b45ac5eada
2 changed files with 7 additions and 4 deletions
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6
src/compositor.c
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@ -716,8 +716,6 @@ weston_surface_draw(struct weston_surface *es, struct weston_output *output)
GLint filter;
int n;
weston_surface_update_transform(es);
pixman_region32_init(&repaint);
pixman_region32_intersect(&repaint, &es->transform.boundingbox,
&output->region);
@ -892,8 +890,6 @@ weston_output_set_cursor(struct weston_output *output,
if (device->sprite == NULL)
return;
weston_surface_update_transform(device->sprite);
pixman_region32_init(&cursor_region);
pixman_region32_intersect(&cursor_region,
&device->sprite->transform.boundingbox,
@ -951,6 +947,8 @@ weston_output_repaint(struct weston_output *output, int msecs)
pixman_region32_init(&overlap);
wl_list_for_each(es, &ec->surface_list, link) {
/* Update surface transform now to avoid calling it ever
* again from the repaint sub-functions. */
weston_surface_update_transform(es);
pixman_region32_init(&surface_overlap);

5
src/shell.c
View file

@ -1034,6 +1034,11 @@ rotate_grab_motion(struct wl_grab *grab,
weston_matrix_init(&surface->rotation.rotation);
weston_matrix_init(&rotate->rotation);
}
/* Repaint implies weston_surface_update_transform(), which
* lazily applies the damage due to rotation update.
*/
weston_compositor_schedule_repaint(surface->surface->compositor);
}
static void