Add powersaver class

src/Makefile.am

@@ -12,7 +12,7 @@ gmenu2x_SOURCES = asfont.cpp button.cpp cpu.cpp dirdialog.cpp filedialog.cpp \
 	textdialog.cpp textmanualdialog.cpp touchscreen.cpp translator.cpp \
 	utilities.cpp wallpaperdialog.cpp \
 	browsedialog.cpp buttonbox.cpp dialog.cpp \
-	imageio.cpp
+	imageio.cpp powersaver.cpp
 
 noinst_HEADERS = asfont.h button.h cpu.h dirdialog.h FastDelegate.h \
 	filedialog.h filelister.h gmenu2x.h gp2x.h iconbutton.h imagedialog.h \
@@ -25,7 +25,7 @@ noinst_HEADERS = asfont.h button.h cpu.h dirdialog.h FastDelegate.h \
 	surfacecollection.h surface.h textdialog.h textmanualdialog.h \
 	touchscreen.h translator.h utilities.h wallpaperdialog.h \
 	browsedialog.h buttonbox.h dialog.h \
-	imageio.h
+	imageio.h powersaver.h
 
 AM_CFLAGS= @CFLAGS@ @SDL_CFLAGS@
 

src/gmenu2x.cpp

@@ -194,6 +194,7 @@ void GMenu2X::gp2x_tvout_off() {
 #endif
 }
 
+
 GMenu2X::GMenu2X() {
 	//Detect firmware version and type
 	if (fileExists("/etc/open2x")) {
@@ -271,7 +272,7 @@ GMenu2X::GMenu2X() {
 #endif
 
 	//Screen
-	if( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO|SDL_INIT_JOYSTICK)<0 ) {
+	if( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO|SDL_INIT_JOYSTICK|SDL_INIT_TIMER)<0 ) {
 		ERROR("Could not initialize SDL: %s\n", SDL_GetError());
 		quit();
 	}
@@ -309,6 +310,7 @@ GMenu2X::GMenu2X() {
 
 	initBG();
 	input.init(path+"input.conf");
+    PowerSaver::getInstance()->setScreenTimeout( confInt["backlightTimeout"] );
 	setInputSpeed();
 	initServices();
 	setBacklight(confInt["backlight"]);
@@ -319,6 +321,7 @@ GMenu2X::GMenu2X() {
 	readTmp();
 	if (lastSelectorElement>-1 && menu->selLinkApp()!=NULL && (!menu->selLinkApp()->getSelectorDir().empty() || !lastSelectorDir.empty()))
 		menu->selLinkApp()->selector(lastSelectorElement,lastSelectorDir);
+
 }
 
 GMenu2X::~GMenu2X() {
@@ -561,6 +564,7 @@ void GMenu2X::readConfig() {
 	evalIntConf( &confInt["maxClock"], 430, 30, 500 );
 	evalIntConf( &confInt["menuClock"], 200, 30, 430 );
 	evalIntConf( &confInt["globalVolume"], 67, 0,100 );
+	evalIntConf( &confInt["backlightTimeout"], 15, 0,120 );
 	evalIntConf( &confInt["backlight"], 100, 5,100 );
 	evalIntConf( &confInt["videoBpp"], 32,32,32 ); // 8,16
 
@@ -816,7 +820,6 @@ void GMenu2X::main() {
 	if (!fileExists(CARD_ROOT))
 		CARD_ROOT = "/";
 
-
 	while (!quit) {
 		tickNow = SDL_GetTicks();
 
@@ -1112,6 +1115,7 @@ void GMenu2X::options() {
 	sd.addSetting(new MenuSettingBool(this,tr["Output logs"],tr["Logs the output of the links. Use the Log Viewer to read them."],&confInt["outputLogs"]));
 	//G
 	sd.addSetting(new MenuSettingInt(this,tr["Lcd Backlight"],tr["Set dingoo's Lcd Backlight value (default: 100)"],&confInt["backlight"],5,100));
+	sd.addSetting(new MenuSettingInt(this,tr["Screen Timeout"],tr["Set screen's backlight timeout in seconds"],&confInt["backlightTimeout"],0,120));
 //	sd.addSetting(new MenuSettingMultiString(this,tr["Tv-Out encoding"],tr["Encoding of the tv-out signal"],&confStr["tvoutEncoding"],&encodings));
 	sd.addSetting(new MenuSettingBool(this,tr["Show root"],tr["Show root folder in the file selection dialogs"],&showRootFolder));
 
@@ -1120,6 +1124,7 @@ void GMenu2X::options() {
 		if (prevbacklight != confInt["backlight"]) setBacklight(confInt["backlight"]);
 		if (curMenuClock!=confInt["menuClock"]) setClock(confInt["menuClock"]);
 		if (curGlobalVolume!=confInt["globalVolume"]) setVolume(confInt["globalVolume"]);
+        PowerSaver::getInstance()->setScreenTimeout( confInt["backlightTimeout"] );
 		if (lang == "English") lang = "";
 		if (lang != tr.lang()) {
 			tr.setLang(lang);

src/gmenu2x.h

@@ -30,6 +30,7 @@
 #include "inputmanager.h"
 #include "asfont.h"
 #include "surface.h"
+#include "powersaver.h"
 
 #include <iostream>
 #include <string>
@@ -122,6 +123,7 @@ private:
 		usbnet,
 		samba,
 		web;
+
 	string ip, defaultgw, lastSelectorDir;
 	int lastSelectorElement;
 	void readConfig();

src/inputmanager.cpp

@@ -21,6 +21,7 @@
 #include "debug.h"
 #include "inputmanager.h"
 #include "utilities.h"
+#include "powersaver.h"
 
 #include <iostream>
 #include <fstream>
@@ -179,6 +180,8 @@ bool InputManager::getEvent(bevent_t *bevent, bool wait) {
               break;
           }
     }
-
+    if ( wait ) {
+        PowerSaver::getInstance()->resetScreenTimer();
+    }
     return true;
 }

src/powersaver.cpp

@@ -0,0 +1,90 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "powersaver.h"
+#include "debug.h"
+PowerSaver* PowerSaver::instance = NULL;
+Uint32 screenTimerCallback(Uint32 interval, void *param)
+{
+    DEBUG("Disable Backlight Event\n");
+    PowerSaver::getInstance()->disableScreen();
+    return 0;
+}
+
+PowerSaver* PowerSaver::getInstance() {
+    if ( instance == NULL ) {
+        instance = new PowerSaver();
+    } 
+    return instance;
+}
+
+PowerSaver::PowerSaver( ) {
+    setScreenTimeout(0);
+    screenTimer = NULL;
+}
+
+PowerSaver::~PowerSaver() {
+    SDL_RemoveTimer(screenTimer);
+}
+
+void PowerSaver::setScreenTimeout( unsigned int seconds ) {
+    screenTimeout = seconds;
+    resetScreenTimer();
+}
+
+void PowerSaver::resetScreenTimer() {
+    if ( screenTimer != NULL ) {
+        SDL_RemoveTimer(screenTimer);
+    }
+    addScreenTimer();
+    //If display is off, turn on it
+    if ( !screenState ) {
+        enableScreen();
+    }
+}
+
+void PowerSaver::addScreenTimer() {
+    //if timeout is zero, don't set timeout
+    if ( screenTimeout == 0 ) {
+        screenTimer = NULL;
+        return;
+    }
+    screenTimer = SDL_AddTimer(screenTimeout*1000, screenTimerCallback,NULL);
+    if ( screenTimer == NULL ) {
+		ERROR("Could not initialize SDLTimer: %s\n", SDL_GetError());
+    } 
+}
+
+#define SCREEN_BLANK_PATH "/sys/class/graphics/fb0/blank"
+void PowerSaver::setScreenBlanking( bool state ) {
+    const char* path = SCREEN_BLANK_PATH;
+    const char* blank = state ? "0" : "1";
+
+	int fd = open(path, O_RDWR);
+	if (fd == -1) {
+		WARNING("Failed to open '%s': %s\n", path, strerror(errno));
+	} else {
+		ssize_t written = write(fd, blank, strlen(blank));
+		if (written == -1) {
+			WARNING("Error writing '%s': %s\n", path, strerror(errno));
+		}
+		close(fd);
+	}
+    screenState = state;
+}
+
+void PowerSaver::enableScreen() {
+    if ( !screenState ) {
+        setScreenBlanking(true);
+    }
+}
+void PowerSaver::disableScreen() {
+    if ( screenState ) {
+        setScreenBlanking(false);
+    }
+}
+
+

src/powersaver.h

@@ -0,0 +1,25 @@
+#ifndef POWERSAVER_H
+#define POWERSAVER_H
+#include <SDL.h>
+class PowerSaver {
+
+    public:
+        static PowerSaver* getInstance();
+        ~PowerSaver();
+        void addScreenTimer();
+        void resetScreenTimer();
+
+        void enableScreen();
+        void disableScreen();
+
+        void setScreenTimeout( unsigned int seconds );
+    private:
+        PowerSaver( );
+        static PowerSaver* instance;
+        bool screenState;
+        unsigned int screenTimeout;
+        SDL_TimerID screenTimer;
+    
+        void setScreenBlanking( bool state ); 
+};
+#endif