LAB: Implement changeVolume()

scummvm · Dec 26, 2015 · 6910a3b · 6910a3b
1 parent dc08713
commit 6910a3b
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/engines/lab/lab.cpp b/engines/lab/lab.cpp
@@ -221,7 +221,12 @@ void LabEngine::drawStaticMessage(byte index) {
 }
 
 void LabEngine::changeVolume(int delta) {
-	warning("STUB: changeVolume()");
+	int sfxPrev = _mixer->getVolumeForSoundType(Audio::Mixer::kSFXSoundType);
+	int musicPrev = _mixer->getVolumeForSoundType(Audio::Mixer::kMusicSoundType);
+	int sfxNew = (delta > 0) ? MIN<int>(sfxPrev + 10, Audio::Mixer::kMaxMixerVolume) : MAX<int>(sfxPrev - 10, 0);
+	int musicNew = (delta > 0) ? MIN<int>(musicPrev + 10, Audio::Mixer::kMaxMixerVolume) : MAX<int>(musicPrev - 10, 0);
+	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, sfxNew);
+	_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, musicNew);
 }
 
 void LabEngine::waitTOF() {