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monitor-config-manager: Use scale from past configs when generating

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When we e.g. generate switch configs (i.e. the ones from pressing the
Super+P or the switch-config key on laptops), try a bit harder to find a
"good" monitor scale.

With "good", it means pick a scale that was used in a previous
configuration. In practice, this means that if you for example have
configured your external monitor to use a specific scale, then pressed
e.g. "built in only", and then switched back to e.g. "external only" or
"linear", the generated configuration will use the scale that was
previously configured.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2479>
This commit is contained in:
Jonas Ådahl 2022-06-23 12:49:35 +02:00 committed by Marge Bot
parent 4580bca664
commit 3dca01a06c
1 changed files with 79 additions and 6 deletions
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79
src/backends/meta-monitor-config-manager.c
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@ -784,14 +784,82 @@ create_preferred_logical_monitor_config (MetaMonitorManager *monitor_ma
return logical_monitor_config;
}
static MetaLogicalMonitorConfig *
find_monitor_config (MetaMonitorsConfig *config,
MetaMonitor *monitor,
MetaMonitorMode *monitor_mode)
{
int mode_width, mode_height;
GList *l;
meta_monitor_mode_get_resolution (monitor_mode, &mode_width, &mode_height);
for (l = config->logical_monitor_configs; l; l = l->next)
{
MetaLogicalMonitorConfig *logical_monitor_config = l->data;
GList *l_monitor;
for (l_monitor = logical_monitor_config->monitor_configs;
l_monitor;
l_monitor = l_monitor->next)
{
MetaMonitorConfig *monitor_config = l_monitor->data;
MetaMonitorModeSpec *mode_spec =
meta_monitor_mode_get_spec (monitor_mode);
if (meta_monitor_spec_equals (meta_monitor_get_spec (monitor),
monitor_config->monitor_spec) &&
meta_monitor_mode_spec_has_similar_size (mode_spec,
monitor_config->mode_spec))
return logical_monitor_config;
}
}
return NULL;
}
static gboolean
get_last_scale_for_monitor (MetaMonitorConfigManager *config_manager,
MetaMonitor *monitor,
MetaMonitorMode *monitor_mode,
float *out_scale)
{
g_autoptr (GList) configs = NULL;
GList *l;
if (config_manager->current_config)
configs = g_list_append (configs, config_manager->current_config);
configs = g_list_concat (configs,
g_list_copy (config_manager->config_history.head));
for (l = configs; l; l = l->next)
{
MetaMonitorsConfig *config = l->data;
MetaLogicalMonitorConfig *logical_monitor_config;
logical_monitor_config = find_monitor_config (config,
monitor, monitor_mode);
if (logical_monitor_config)
{
*out_scale = logical_monitor_config->scale;
return TRUE;
}
}
return FALSE;
}
static float
compute_scale_for_monitor (MetaMonitorManager *monitor_manager,
compute_scale_for_monitor (MetaMonitorConfigManager *config_manager,
MetaMonitor *monitor,
MetaMonitor *primary_monitor)
{
MetaMonitorManager *monitor_manager = config_manager->monitor_manager;
MetaMonitor *target_monitor = monitor;
MetaLogicalMonitorLayoutMode layout_mode;
MetaMonitorMode *monitor_mode;
float scale;
if ((meta_monitor_manager_get_capabilities (monitor_manager) &
META_MONITOR_MANAGER_CAPABILITY_GLOBAL_SCALE_REQUIRED) &&
@ -801,6 +869,11 @@ compute_scale_for_monitor (MetaMonitorManager *monitor_manager,
layout_mode = meta_monitor_manager_get_default_layout_mode (monitor_manager);
monitor_mode = meta_monitor_get_preferred_mode (target_monitor);
if (get_last_scale_for_monitor (config_manager,
target_monitor, monitor_mode,
&scale))
return scale;
return meta_monitor_manager_calculate_monitor_mode_scale (monitor_manager,
layout_mode,
target_monitor,
@ -897,7 +970,7 @@ create_monitors_config (MetaMonitorConfigManager *config_manager,
break;
}
scale = compute_scale_for_monitor (monitor_manager, monitor,
scale = compute_scale_for_monitor (config_manager, monitor,
primary_monitor);
logical_monitor_config =
create_preferred_logical_monitor_config (monitor_manager,
@ -1261,7 +1334,7 @@ create_for_switch_config_all_mirror (MetaMonitorConfigManager *config_manager)
if (!mode)
continue;
scale = compute_scale_for_monitor (monitor_manager, monitor,
scale = compute_scale_for_monitor (config_manager, monitor,
primary_monitor);
best_scale = MAX (best_scale, scale);
monitor_configs = g_list_prepend (monitor_configs, create_monitor_config (monitor, mode));