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compositor: recompute output position on mode switch

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When an output permanently changes its resolution, the output on the right
should be moved accordingly. We also add an event for output resizing so that
plugins can react when an output is resized.

Signed-off-by: David Fort <contact@hardening-consulting.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This commit is contained in:
David Fort 2016-05-27 23:22:57 +02:00 committed by Pekka Paalanen
parent ba2ad0ee4f
commit 0de859ede4
2 changed files with 26 additions and 10 deletions
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35
src/compositor.c
View file

@ -143,6 +143,11 @@ static void weston_mode_switch_finish(struct weston_output *output,
}
}
static void
weston_compositor_reflow_outputs(struct weston_compositor *compositor,
struct weston_output *resized_output, int delta_width);
WL_EXPORT int
weston_output_mode_set_native(struct weston_output *output,
struct weston_mode *mode,
@ -150,6 +155,7 @@ weston_output_mode_set_native(struct weston_output *output,
{
int ret;
int mode_changed = 0, scale_changed = 0;
int32_t old_width;
if (!output->switch_mode)
return -1;
@ -165,11 +171,17 @@ weston_output_mode_set_native(struct weston_output *output,
}
}
old_width = output->width;
output->native_mode = mode;
output->native_scale = scale;
weston_mode_switch_finish(output, mode_changed, scale_changed);
if (mode_changed || scale_changed) {
weston_compositor_reflow_outputs(output->compositor, output, output->width - old_width);
wl_signal_emit(&output->compositor->output_resized_signal, output);
}
return 0;
}
@ -3918,23 +3930,25 @@ bind_output(struct wl_client *client,
wl_output_send_done(resource);
}
/* Move other outputs when one is removed so the space remains contiguos. */
/* Move other outputs when one is resized so the space remains contiguous. */
static void
weston_compositor_remove_output(struct weston_compositor *compositor,
struct weston_output *remove_output)
weston_compositor_reflow_outputs(struct weston_compositor *compositor,
struct weston_output *resized_output, int delta_width)
{
struct weston_output *output;
int offset = 0;
bool start_resizing = false;
if (!delta_width)
return;
wl_list_for_each(output, &compositor->output_list, link) {
if (output == remove_output) {
offset = output->width;
if (output == resized_output) {
start_resizing = true;
continue;
}
if (offset > 0) {
weston_output_move(output,
output->x - offset, output->y);
if (start_resizing) {
weston_output_move(output, output->x + delta_width, output->y);
output->dirty = 1;
}
}
@ -3957,7 +3971,7 @@ weston_output_destroy(struct weston_output *output)
weston_presentation_feedback_discard_list(&output->feedback_list);
weston_compositor_remove_output(output->compositor, output);
weston_compositor_reflow_outputs(output->compositor, output, output->width);
wl_list_remove(&output->link);
wl_signal_emit(&output->compositor->output_destroyed_signal, output);
@ -4560,6 +4574,7 @@ weston_compositor_create(struct wl_display *display, void *user_data)
wl_signal_init(&ec->output_created_signal);
wl_signal_init(&ec->output_destroyed_signal);
wl_signal_init(&ec->output_moved_signal);
wl_signal_init(&ec->output_resized_signal);
wl_signal_init(&ec->session_signal);
ec->session_active = 1;

1
src/compositor.h
View file

@ -744,6 +744,7 @@ struct weston_compositor {
struct wl_signal output_created_signal;
struct wl_signal output_destroyed_signal;
struct wl_signal output_moved_signal;
struct wl_signal output_resized_signal; /* callback argument: resized output */
struct wl_signal session_signal;
int session_active;