Add API to access battery power state

Done:
- X11, server (tested)
- Windows (developed, would be nice to retest)
- OSX (not tested)
Prepared (not developed):
- Android (code is here, but may not compile)
- iphone
- winrt
- bb10
- haiku
- javascript

1 files changed, 10 insertions, 0 deletions

diff --git a/core/os/os.cpp b/core/os/os.cpp
index 912f7f0b0f..1d670b4466 100644
--- a/core/os/os.cpp
+++ b/core/os/os.cpp
@@ -513,6 +513,16 @@ bool OS::is_vsync_enabled() const{
 }
 
 
+PowerState OS::get_power_state() {
+	return POWERSTATE_UNKNOWN;
+}
+int OS::get_power_seconds_left() {
+	return -1;
+}
+int OS::get_power_percent_left() {
+	return -1;
+}
+
 OS::OS() {
 	last_error=NULL;
 	singleton=this;