diff --git a/src/core/monitor-private.h b/src/core/monitor-private.h
index 14237bd5d..d63c659b1 100644
--- a/src/core/monitor-private.h
+++ b/src/core/monitor-private.h
@@ -92,6 +92,10 @@ struct _MetaOutput
MetaOutput **possible_clones;
unsigned int n_possible_clones;
+ int backlight;
+ int backlight_min;
+ int backlight_max;
+
/* Used when changing configuration */
gboolean dirty;
diff --git a/src/core/monitor.c b/src/core/monitor.c
index c3f0b8488..792be7ea1 100644
--- a/src/core/monitor.c
+++ b/src/core/monitor.c
@@ -253,6 +253,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
manager->outputs[0].possible_crtcs[2] = &manager->crtcs[2];
manager->outputs[0].n_possible_clones = 0;
manager->outputs[0].possible_clones = g_new0 (MetaOutput *, 0);
+ manager->outputs[0].backlight = -1;
+ manager->outputs[0].backlight_min = 0;
+ manager->outputs[0].backlight_max = 0;
manager->outputs[1].crtc = &manager->crtcs[0];
manager->outputs[1].output_id = 7;
@@ -277,6 +280,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
manager->outputs[1].possible_crtcs[2] = &manager->crtcs[2];
manager->outputs[1].n_possible_clones = 0;
manager->outputs[1].possible_clones = g_new0 (MetaOutput *, 0);
+ manager->outputs[1].backlight = -1;
+ manager->outputs[1].backlight_min = 0;
+ manager->outputs[1].backlight_max = 0;
manager->outputs[2].crtc = NULL;
manager->outputs[2].output_id = 8;
@@ -300,6 +306,9 @@ make_dummy_monitor_config (MetaMonitorManager *manager)
manager->outputs[2].possible_crtcs[2] = &manager->crtcs[2];
manager->outputs[2].n_possible_clones = 0;
manager->outputs[2].possible_clones = g_new0 (MetaOutput *, 0);
+ manager->outputs[2].backlight = -1;
+ manager->outputs[2].backlight_min = 0;
+ manager->outputs[2].backlight_max = 0;
}
#ifdef HAVE_RANDR
@@ -402,6 +411,74 @@ output_get_presentation_xrandr (MetaMonitorManager *manager,
return value;
}
+static int
+normalize_backlight (MetaOutput *output,
+ int hw_value)
+{
+ return round((double)(hw_value - output->backlight_min) /
+ (output->backlight_max - output->backlight_min) * 100.0);
+}
+
+static int
+output_get_backlight_xrandr (MetaMonitorManager *manager,
+ MetaOutput *output)
+{
+ MetaDisplay *display = meta_get_display ();
+ gboolean value;
+ Atom actual_type;
+ int actual_format;
+ unsigned long nitems, bytes_after;
+ unsigned char *buffer;
+
+ XRRGetOutputProperty (manager->xdisplay,
+ (XID)output->output_id,
+ display->atom_BACKLIGHT,
+ 0, G_MAXLONG, False, False, XA_INTEGER,
+ &actual_type, &actual_format,
+ &nitems, &bytes_after, &buffer);
+
+ if (actual_type != XA_INTEGER || actual_format != 32 ||
+ nitems < 1)
+ return -1;
+
+ value = ((int*)buffer)[0];
+
+ XFree (buffer);
+ return normalize_backlight (output, value);
+}
+
+static void
+output_get_backlight_limits_xrandr (MetaMonitorManager *manager,
+ MetaOutput *output)
+{
+ MetaDisplay *display = meta_get_display ();
+ XRRPropertyInfo *info;
+
+ meta_error_trap_push (display);
+ info = XRRQueryOutputProperty (manager->xdisplay,
+ (XID)output->output_id,
+ display->atom_BACKLIGHT);
+ meta_error_trap_pop (display);
+
+ if (info == NULL)
+ {
+ meta_warning ("could not get output property for %s\n", output->name);
+ return;
+ }
+
+ if (!info->range || info->num_values != 2)
+ {
+ meta_verbose ("backlight %s was not range\n", output->name);
+ goto out;
+ }
+
+ output->backlight_min = info->values[0];
+ output->backlight_max = info->values[1];
+
+out:
+ XFree (info);
+}
+
static int
compare_outputs (const void *one,
const void *two)
@@ -603,6 +680,12 @@ read_monitor_infos_from_xrandr (MetaMonitorManager *manager)
meta_output->is_primary = ((XID)meta_output->output_id == primary_output);
meta_output->is_presentation = output_get_presentation_xrandr (manager, meta_output);
+ output_get_backlight_limits_xrandr (manager, meta_output);
+
+ if (!(meta_output->backlight_min == 0 && meta_output->backlight_max == 0))
+ meta_output->backlight = output_get_backlight_xrandr (manager, meta_output);
+ else
+ meta_output->backlight = -1;
n_actual_outputs++;
}
@@ -1136,6 +1219,8 @@ meta_monitor_manager_handle_get_resources (MetaDBusDisplayConfig *skeleton,
g_variant_new_string (output->serial));
g_variant_builder_add (&properties, "{sv}", "display-name",
g_variant_new_take_string (make_display_name (output)));
+ g_variant_builder_add (&properties, "{sv}", "backlight",
+ g_variant_new_int32 (output->backlight));
g_variant_builder_add (&properties, "{sv}", "primary",
g_variant_new_boolean (output->is_primary));
g_variant_builder_add (&properties, "{sv}", "presentation",
@@ -1467,8 +1552,8 @@ meta_monitor_manager_apply_configuration (MetaMonitorManager *manager,
MetaOutputInfo **outputs,
unsigned int n_outputs)
{
- if (manager->backend == META_BACKEND_XRANDR)
- apply_config_xrandr (manager, crtcs, n_crtcs, outputs, n_outputs);
+ if (manager->backend == META_BACKEND_XRANDR)
+ apply_config_xrandr (manager, crtcs, n_crtcs, outputs, n_outputs);
else
apply_config_dummy (manager, crtcs, n_crtcs, outputs, n_outputs);
}
@@ -1677,11 +1762,97 @@ meta_monitor_manager_handle_apply_configuration (MetaDBusDisplayConfig *skeleto
return TRUE;
}
+#ifdef HAVE_RANDR
+static void
+handle_change_backlight_xrandr (MetaMonitorManager *manager,
+ MetaOutput *output,
+ gint value)
+{
+ MetaDisplay *display = meta_get_display ();
+ int hw_value;
+
+ hw_value = round((double)value / 100.0 * output->backlight_max + output->backlight_min);
+
+ meta_error_trap_push (display);
+ XRRChangeOutputProperty (manager->xdisplay,
+ (XID)output->output_id,
+ display->atom_BACKLIGHT,
+ XA_INTEGER, 32, PropModeReplace,
+ (unsigned char *) &hw_value, 1);
+ meta_error_trap_pop (display);
+
+ /* We're not selecting for property notifies, so update the value immediately */
+ output->backlight = normalize_backlight (output, hw_value);
+}
+#endif
+
+static void
+handle_change_backlight_dummy (MetaMonitorManager *manager,
+ MetaOutput *output,
+ gint value)
+{
+ g_assert_not_reached ();
+}
+
+static gboolean
+meta_monitor_manager_handle_change_backlight (MetaDBusDisplayConfig *skeleton,
+ GDBusMethodInvocation *invocation,
+ guint serial,
+ guint output_id,
+ gint value)
+{
+ MetaMonitorManager *manager = META_MONITOR_MANAGER (skeleton);
+ MetaOutput *output;
+
+ if (serial != manager->serial)
+ {
+ g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
+ G_DBUS_ERROR_ACCESS_DENIED,
+ "The requested configuration is based on stale information");
+ return TRUE;
+ }
+
+ if (output_id < 0 || output_id >= manager->n_outputs)
+ {
+ g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
+ G_DBUS_ERROR_INVALID_ARGS,
+ "Invalid output id");
+ return TRUE;
+ }
+ output = &manager->outputs[output_id];
+
+ if (value < 0 || value > 100)
+ {
+ g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
+ G_DBUS_ERROR_INVALID_ARGS,
+ "Invalid backlight value");
+ return TRUE;
+ }
+
+ if (output->backlight == -1 ||
+ (output->backlight_min == 0 && output->backlight_max == 0))
+ {
+ g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR,
+ G_DBUS_ERROR_INVALID_ARGS,
+ "Output does not support changing backlight");
+ return TRUE;
+ }
+
+ if (manager->backend == META_BACKEND_XRANDR)
+ handle_change_backlight_xrandr (manager, output, value);
+ else
+ handle_change_backlight_dummy (manager, output, value);
+
+ meta_dbus_display_config_complete_change_backlight (skeleton, invocation);
+ return TRUE;
+}
+
static void
meta_monitor_manager_display_config_init (MetaDBusDisplayConfigIface *iface)
{
iface->handle_get_resources = meta_monitor_manager_handle_get_resources;
iface->handle_apply_configuration = meta_monitor_manager_handle_apply_configuration;
+ iface->handle_change_backlight = meta_monitor_manager_handle_change_backlight;
}
static void
diff --git a/src/meta/atomnames.h b/src/meta/atomnames.h
index 8abcc60dc..d7a6e7e35 100644
--- a/src/meta/atomnames.h
+++ b/src/meta/atomnames.h
@@ -80,6 +80,7 @@ item(MULTIPLE)
item(TIMESTAMP)
item(VERSION)
item(ATOM_PAIR)
+item(BACKLIGHT)
/* Oddities: These are used, and we need atoms for them,
* but when we need all _NET_WM hints (i.e. when we're making
diff --git a/src/xrandr.xml b/src/xrandr.xml
index 34acbcca2..02255361b 100644
--- a/src/xrandr.xml
+++ b/src/xrandr.xml
@@ -95,6 +95,9 @@
particular hardware part
- "display-name" (s): (readonly) a human readable name
of this output, to be shown in the UI
+ - "backlight" (i): (readonly, use the specific interface)
+ the backlight value as a percentage
+ (-1 if not supported)
- "primary" (b): whether this output is primary
or not
- "presentation" (b): whether this output is
@@ -197,6 +200,21 @@
+
+
+
+
+
+
+