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AGI: Kill the timer based counter

Browse Source 
Using the timer mechanism for just a simple counter is not just
overkill, its also inaccurate. When using a call frequency of x,
and waiting for y callbacks, the passed time will not be x*y.
The problem amplifies on slower platforms and/or fair thread
schedulers.
Use absolute times instead. Most notably, the walking speed of
the avatar is now smooth on android, but probably on all other
handhelds we support too.
This commit is contained in:
dhewg 2011-03-05 10:32:56 +01:00
parent 83b00526d0
commit 69a026192e
3 changed files with 6 additions and 25 deletions
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21
engines/agi/agi.cpp
View File

@ -273,23 +273,16 @@ void AgiEngine::processEvents() {
}
void AgiEngine::pollTimer() {
uint32 dm;
_lastTick += 50;
if (_tickTimer < _lastTickTimer)
_lastTickTimer = 0;
while ((dm = _tickTimer - _lastTickTimer) < 5) {
while (_system->getMillis() < _lastTick) {
processEvents();
_console->onFrame();
_system->delayMillis(10);
_system->updateScreen();
}
_lastTickTimer = _tickTimer;
}
void AgiEngine::agiTimerFunctionLow(void *refCon) {
AgiEngine *self = (AgiEngine *)refCon;
self->_tickTimer++;
_lastTick = _system->getMillis();
}
void AgiEngine::pause(uint32 msec) {
@ -532,9 +525,6 @@ AgiEngine::AgiEngine(OSystem *syst, const AGIGameDescription *gameDesc) : AgiBas
_allowSynthetic = false;
_tickTimer = 0;
_lastTickTimer = 0;
_intobj = NULL;
_menu = NULL;
@ -646,11 +636,10 @@ void AgiEngine::initialize() {
_lastSaveTime = 0;
_timer->installTimerProc(agiTimerFunctionLow, 10 * 1000, this);
_lastTick = _system->getMillis();
debugC(2, kDebugLevelMain, "Detect game");
if (agiDetectGame() == errOK) {
_game.state = STATE_LOADED;
debugC(2, kDebugLevelMain, "game loaded");
@ -662,8 +651,6 @@ void AgiEngine::initialize() {
}
AgiEngine::~AgiEngine() {
_timer->removeTimerProc(agiTimerFunctionLow);
// If the engine hasn't been initialized yet via AgiEngine::initialize(), don't attempt to free any resources,
// as they haven't been allocated. Fixes bug #1742432 - AGI: Engine crashes if no game is detected
if (_game.state == STATE_INIT) {

5
engines/agi/agi.h
View File

@ -810,9 +810,7 @@ public:
Common::Error saveGameState(int slot, const char *desc);
private:
uint32 _tickTimer;
uint32 _lastTickTimer;
uint32 _lastTick;
int _keyQueue[KEY_QUEUE_SIZE];
int _keyQueueStart;
@ -883,7 +881,6 @@ public:
virtual bool isKeypress();
virtual void clearKeyQueue();
static void agiTimerFunctionLow(void *refCon);
void initPriTable();
void newInputMode(InputMode mode);

3
engines/agi/preagi.cpp
View File

@ -122,9 +122,6 @@ void PreAgiEngine::initialize() {
_mixer->playStream(Audio::Mixer::kSFXSoundType, &_speakerHandle,
_speakerStream, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true);
//_timer->installTimerProc(agiTimerFunctionLow, 10 * 1000, NULL);
debugC(2, kDebugLevelMain, "Detect game");
// clear all resources and events