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synced 2024-11-24 17:10:40 -05:00
MonitorManager: add support for backlight
GnomeRR needs that too. The backlight is exported as a normalized 0-100 value, or -1 if not supported. Clamping to HW limits is handled by the backend. Changing backlight uses a different method call, to avoid recomputing the full display configuration every time the user presses the backlight keys. https://bugzilla.gnome.org/show_bug.cgi?id=705670
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@ -92,6 +92,10 @@ struct _MetaOutput
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MetaOutput **possible_clones;
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unsigned int n_possible_clones;
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int backlight;
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int backlight_min;
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int backlight_max;
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/* Used when changing configuration */
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gboolean is_dirty;
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@ -251,6 +251,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
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manager->outputs[0].possible_crtcs[2] = &manager->crtcs[2];
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manager->outputs[0].n_possible_clones = 0;
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manager->outputs[0].possible_clones = g_new0 (MetaOutput *, 0);
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manager->outputs[0].backlight = -1;
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manager->outputs[0].backlight_min = 0;
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manager->outputs[0].backlight_max = 0;
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manager->outputs[1].crtc = &manager->crtcs[0];
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manager->outputs[1].output_id = 7;
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@ -275,6 +278,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
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manager->outputs[1].possible_crtcs[2] = &manager->crtcs[2];
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manager->outputs[1].n_possible_clones = 0;
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manager->outputs[1].possible_clones = g_new0 (MetaOutput *, 0);
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manager->outputs[1].backlight = -1;
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manager->outputs[1].backlight_min = 0;
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manager->outputs[1].backlight_max = 0;
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manager->outputs[2].crtc = NULL;
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manager->outputs[2].output_id = 8;
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@ -298,6 +304,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
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manager->outputs[2].possible_crtcs[2] = &manager->crtcs[2];
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manager->outputs[2].n_possible_clones = 0;
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manager->outputs[2].possible_clones = g_new0 (MetaOutput *, 0);
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manager->outputs[2].backlight = -1;
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manager->outputs[2].backlight_min = 0;
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manager->outputs[2].backlight_max = 0;
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}
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#ifdef HAVE_RANDR
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@ -400,6 +409,74 @@ output_get_presentation_xrandr (MetaMonitorManager *manager,
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return value;
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}
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static int
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normalize_backlight (MetaOutput *output,
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int hw_value)
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{
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return round ((double)(hw_value - output->backlight_min) /
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(output->backlight_max - output->backlight_min) * 100.0);
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}
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static int
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output_get_backlight_xrandr (MetaMonitorManager *manager,
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MetaOutput *output)
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{
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MetaDisplay *display = meta_get_display ();
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gboolean value;
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Atom actual_type;
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int actual_format;
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unsigned long nitems, bytes_after;
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unsigned char *buffer;
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XRRGetOutputProperty (manager->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT,
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0, G_MAXLONG, False, False, XA_INTEGER,
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&actual_type, &actual_format,
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&nitems, &bytes_after, &buffer);
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if (actual_type != XA_INTEGER || actual_format != 32 ||
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nitems < 1)
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return -1;
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value = ((int*)buffer)[0];
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XFree (buffer);
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return normalize_backlight (output, value);
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}
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static void
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output_get_backlight_limits_xrandr (MetaMonitorManager *manager,
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MetaOutput *output)
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{
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MetaDisplay *display = meta_get_display ();
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XRRPropertyInfo *info;
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meta_error_trap_push (display);
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info = XRRQueryOutputProperty (manager->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT);
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meta_error_trap_pop (display);
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if (info == NULL)
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{
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meta_warning ("could not get output property for %s\n", output->name);
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return;
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}
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if (!info->range || info->num_values != 2)
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{
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meta_verbose ("backlight %s was not range\n", output->name);
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goto out;
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}
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output->backlight_min = info->values[0];
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output->backlight_max = info->values[1];
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out:
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XFree (info);
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}
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static int
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compare_outputs (const void *one,
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const void *two)
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@ -602,6 +679,12 @@ read_monitor_infos_from_xrandr (MetaMonitorManager *manager)
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meta_output->is_primary = ((XID)meta_output->output_id == primary_output);
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meta_output->is_presentation = output_get_presentation_xrandr (manager, meta_output);
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output_get_backlight_limits_xrandr (manager, meta_output);
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if (!(meta_output->backlight_min == 0 && meta_output->backlight_max == 0))
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meta_output->backlight = output_get_backlight_xrandr (manager, meta_output);
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else
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meta_output->backlight = -1;
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n_actual_outputs++;
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}
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@ -1123,6 +1206,8 @@ meta_monitor_manager_handle_get_resources (MetaDBusDisplayConfig *skeleton,
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g_variant_new_string (output->serial));
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g_variant_builder_add (&properties, "{sv}", "display-name",
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g_variant_new_take_string (make_display_name (output)));
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g_variant_builder_add (&properties, "{sv}", "backlight",
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g_variant_new_int32 (output->backlight));
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g_variant_builder_add (&properties, "{sv}", "primary",
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g_variant_new_boolean (output->is_primary));
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g_variant_builder_add (&properties, "{sv}", "presentation",
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@ -1466,8 +1551,8 @@ meta_monitor_manager_apply_configuration (MetaMonitorManager *manager,
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MetaOutputInfo **outputs,
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unsigned int n_outputs)
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{
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if (manager->backend == META_BACKEND_XRANDR)
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apply_config_xrandr (manager, crtcs, n_crtcs, outputs, n_outputs);
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if (manager->backend == META_BACKEND_XRANDR)
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apply_config_xrandr (manager, crtcs, n_crtcs, outputs, n_outputs);
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else
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apply_config_dummy (manager, crtcs, n_crtcs, outputs, n_outputs);
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}
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@ -1692,11 +1777,97 @@ meta_monitor_manager_handle_apply_configuration (MetaDBusDisplayConfig *skeleto
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return TRUE;
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}
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#ifdef HAVE_RANDR
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static void
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handle_change_backlight_xrandr (MetaMonitorManager *manager,
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MetaOutput *output,
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gint value)
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{
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MetaDisplay *display = meta_get_display ();
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int hw_value;
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hw_value = round ((double)value / 100.0 * output->backlight_max + output->backlight_min);
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meta_error_trap_push (display);
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XRRChangeOutputProperty (manager->xdisplay,
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(XID)output->output_id,
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display->atom_BACKLIGHT,
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XA_INTEGER, 32, PropModeReplace,
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(unsigned char *) &hw_value, 1);
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meta_error_trap_pop (display);
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/* We're not selecting for property notifies, so update the value immediately */
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output->backlight = normalize_backlight (output, hw_value);
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}
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#endif
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static void
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handle_change_backlight_dummy (MetaMonitorManager *manager,
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MetaOutput *output,
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gint value)
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{
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g_assert_not_reached ();
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}
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static gboolean
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meta_monitor_manager_handle_change_backlight (MetaDBusDisplayConfig *skeleton,
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GDBusMethodInvocation *invocation,
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guint serial,
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guint output_id,
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gint value)
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{
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MetaMonitorManager *manager = META_MONITOR_MANAGER (skeleton);
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MetaOutput *output;
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if (serial != manager->serial)
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{
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g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
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G_DBUS_ERROR_ACCESS_DENIED,
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"The requested configuration is based on stale information");
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return TRUE;
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}
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if (output_id >= manager->n_outputs)
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{
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g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
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G_DBUS_ERROR_INVALID_ARGS,
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"Invalid output id");
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return TRUE;
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}
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output = &manager->outputs[output_id];
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if (value < 0 || value > 100)
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{
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g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
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G_DBUS_ERROR_INVALID_ARGS,
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"Invalid backlight value");
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return TRUE;
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}
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if (output->backlight == -1 ||
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(output->backlight_min == 0 && output->backlight_max == 0))
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{
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g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
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G_DBUS_ERROR_INVALID_ARGS,
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"Output does not support changing backlight");
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return TRUE;
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}
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if (manager->backend == META_BACKEND_XRANDR)
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handle_change_backlight_xrandr (manager, output, value);
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else
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handle_change_backlight_dummy (manager, output, value);
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meta_dbus_display_config_complete_change_backlight (skeleton, invocation);
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return TRUE;
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}
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static void
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meta_monitor_manager_display_config_init (MetaDBusDisplayConfigIface *iface)
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{
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iface->handle_get_resources = meta_monitor_manager_handle_get_resources;
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iface->handle_apply_configuration = meta_monitor_manager_handle_apply_configuration;
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iface->handle_change_backlight = meta_monitor_manager_handle_change_backlight;
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}
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static void
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@ -80,6 +80,7 @@ item(MULTIPLE)
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item(TIMESTAMP)
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item(VERSION)
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item(ATOM_PAIR)
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item(BACKLIGHT)
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/* Oddities: These are used, and we need atoms for them,
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* but when we need all _NET_WM hints (i.e. when we're making
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@ -95,6 +95,9 @@
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particular hardware part
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- "display-name" (s): (readonly) a human readable name
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of this output, to be shown in the UI
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- "backlight" (i): (readonly, use the specific interface)
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the backlight value as a percentage
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(-1 if not supported)
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- "primary" (b): whether this output is primary
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or not
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- "presentation" (b): whether this output is
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@ -195,6 +198,21 @@
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<arg name="outputs" direction="in" type="a(ua{sv})" />
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</method>
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<!--
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ChangeBacklight:
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@serial: configuration serial
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@output: the API id of the output
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@value: the new backlight value
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Changes the backlight of @output to @value, which is
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expressed as a percentage and rounded to the HW limits.
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-->
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<method name="ChangeBacklight">
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<arg name="serial" direction="in" type="u" />
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<arg name="output" direction="in" type="u" />
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<arg name="value" direction="in" type="i" />
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</method>
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<!--
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PowerSaveMode:
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