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libweston: Don't move outputs during enable

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This is pretty counter-intuitive, and should probably happen outside of
the core in the front end while configuring the outputs.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman
2022-07-26 16:17:17 -05:00
committed by Daniel Stone
parent 3b3fdc52c3
commit 8409b74ec2
2 changed files with 37 additions and 12 deletions
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compositor/main.c
+36
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@@ -1707,6 +1707,38 @@ wet_head_tracker_create(struct wet_compositor *compositor,
weston_head_add_destroy_listener(head, &track->head_destroy_listener);
}
/* Place output exactly to the right of the most recently enabled output.
*
* Historically, we haven't given much thought to output placement,
* simply adding outputs in a horizontal line as they're enabled. This
* function simply sets an output's x coordinate to the right of the
* most recently enabled output, and its y to zero.
*
* If you're adding new calls to this function, you're also not giving
* much thought to output placement, so please consider carefully if
* it's really doing what you want.
*
* You especially don't want to use this for any code that won't
* immediately enable the passed output.
*/
static void
weston_output_lazy_align(struct weston_output *output)
{
struct weston_compositor *c;
struct weston_output *peer;
int next_x = 0;
/* Put this output to the right of the most recently enabled output */
c = output->compositor;
if (!wl_list_empty(&c->output_list)) {
peer = container_of(c->output_list.prev,
struct weston_output, link);
next_x = peer->x + peer->width;
}
output->x = next_x;
output->y = 0;
}
static void
simple_head_enable(struct wet_compositor *wet, struct weston_head *head)
{
@@ -1723,6 +1755,8 @@ simple_head_enable(struct wet_compositor *wet, struct weston_head *head)
return;
}
weston_output_lazy_align(output);
if (wet->simple_output_configure)
ret = wet->simple_output_configure(output);
if (ret < 0) {
@@ -2359,6 +2393,8 @@ drm_try_enable(struct weston_output *output,
{
/* Try to enable, and detach heads one by one until it succeeds. */
while (!output->enabled) {
weston_output_lazy_align(output);
if (weston_output_enable(output) == 0)
return 0;