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ENGINES: Implement autosaving in the Engine base class

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This commit is contained in:
Paul Gilbert 2020-02-04 22:25:13 -08:00 committed by Paul Gilbert
parent a00e44ba6c
commit 30d34fa63d
3 changed files with 41 additions and 10 deletions
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4
backends/events/default/default-events.cpp
View File

@ -89,6 +89,10 @@ bool DefaultEventManager::pollEvent(Common::Event &event) {
handleKeyRepeat();
}
if (g_engine)
// Handle autosaves if enabled
g_engine->handleAutoSave();
if (_eventQueue.empty()) {
return false;
}

18
engines/engine.cpp
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@ -148,7 +148,9 @@ Engine::Engine(OSystem *syst)
_saveSlotToLoad(-1),
_engineStartTime(_system->getMillis()),
_mainMenuDialog(NULL),
_debugger(NULL) {
_debugger(NULL),
_autosaveInterval(ConfMan.getInt("autosave_period")),
_lastAutosaveTime(_system->getMillis()) {
g_engine = this;
Common::setErrorOutputFormatter(defaultOutputFormatter);
@ -482,10 +484,16 @@ void Engine::checkCD() {
#endif
}
bool Engine::shouldPerformAutoSave(int lastSaveTime) {
const int diff = _system->getMillis() - lastSaveTime;
const int autosavePeriod = ConfMan.getInt("autosave_period");
return autosavePeriod != 0 && diff > autosavePeriod * 1000;
void Engine::handleAutoSave() {
const int diff = _system->getMillis() - _lastAutosaveTime;
if (_autosaveInterval != 0 && diff > (_autosaveInterval * 1000)) {
// Save the autosave
saveGameState(getAutosaveSlot(), _("Autosave"), true);
// Reset the last autosave time
_lastAutosaveTime = _system->getMillis();
}
}
void Engine::errorString(const char *buf1, char *buf2, int size) {

29
engines/engine.h
View File

@ -91,6 +91,16 @@ private:
*/
int32 _engineStartTime;
/**
* Autosave interval
*/
const int _autosaveInterval;
/**
* The last time an autosave was done
*/
int _lastAutosaveTime;
/**
* Save slot selected via global main menu.
* This slot will be loaded after main menu execution (not from inside
@ -290,7 +300,6 @@ public:
bool loadGameDialog();
protected:
/**
* Actual implementation of pauseEngine by subclasses. See there
* for details.
@ -367,17 +376,27 @@ public:
inline Common::SaveFileManager *getSaveFileManager() { return _saveFileMan; }
public:
/** On some systems, check if the game appears to be run from CD. */
void checkCD();
protected:
/**
* Indicate whether an autosave should be performed.
* Checks for whether it's time to do an autosave, and if so, does it.
*/
bool shouldPerformAutoSave(int lastSaveTime);
void handleAutoSave();
/**
* Returns the slot that should be used for autosaves
*/
virtual int getAutosaveSlot() const {
return 0;
}
bool shouldPerformAutoSave(int lastSaveTime) {
// TODO: Remove deprecated method once all engines are refactored
// to no longer do autosaves directly themselves
return false;
}
};
// Chained games