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libweston: Allow changing scale

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The RDP backend wants to be able to change scale for existing outputs,
so try to hook this up mostly in the same way a mode switch works.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2022-08-09 07:43:37 -05:00 committed by Daniel Stone
parent bf8c7ddd8f
commit cb796135be
1 changed files with 9 additions and 6 deletions
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15
libweston/compositor.c
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@ -6698,13 +6698,16 @@ WL_EXPORT void
weston_output_set_scale(struct weston_output *output,
int32_t scale)
{
/* We can only set scale on a disabled output */
assert(!output->enabled);
/* We only want to set scale once */
assert(!output->scale);
output->scale = scale;
if (!output->enabled)
return;
if (output->current_scale == scale)
return;
output->current_scale = scale;
weston_mode_switch_finish(output, false, true);
wl_signal_emit(&output->compositor->output_resized_signal, output);
}
/** Sets the output transform for a given output.