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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "common/config-manager.h"
#include "agi/agi.h"
namespace Agi {
bool AgiBase::getFlag(int16 flagNr) {
uint8 *flagPtr = _game.flags;
flagPtr += flagNr >> 3;
return (*flagPtr & (1 << (flagNr & 0x07))) != 0;
}
void AgiBase::setFlag(int16 flagNr, bool newState) {
uint8 *flagPtr = _game.flags;
flagPtr += flagNr >> 3;
if (newState)
*flagPtr |= 1 << (flagNr & 0x07); // set bit
else
*flagPtr &= ~(1 << (flagNr & 0x07)); // clear bit
}
void AgiBase::flipFlag(int16 flagNr) {
uint8 *flagPtr = _game.flags;
flagPtr += flagNr >> 3;
*flagPtr ^= 1 << (flagNr & 0x07); // flip bit
}
void AgiEngine::setVar(int16 varNr, byte newValue) {
_game.vars[varNr] = newValue;
if (varNr == VM_VAR_VOLUME) {
setVolumeViaScripts(newValue);
}
}
byte AgiEngine::getVar(int16 varNr) {
switch (varNr) {
case VM_VAR_SECONDS:
case VM_VAR_MINUTES:
case VM_VAR_HOURS:
case VM_VAR_DAYS:
// Timer Update is necessary in here, because of at least Manhunter 1 script 153
// Sierra AGI updated the timer via a timer procedure
inGameTimerUpdate();
break;
default:
break;
}
return _game.vars[varNr];
}
// sets volume based on script value
// 0 - maximum volume
// 15 - mute
void AgiEngine::setVolumeViaScripts(byte newVolume) {
newVolume = CLIP<byte>(newVolume, 0, 15);
newVolume = 15 - newVolume; // turn volume around
int scummVMVolume = newVolume * Audio::Mixer::kMaxMixerVolume / 15;
bool scummVMMute = false;
// Set ScummVM setting
// We do not set "mute". In case "mute" is set, we will not apply the scripts wishes
ConfMan.setInt("music_volume", scummVMVolume);
ConfMan.setInt("sfx_volume", scummVMVolume);
if (ConfMan.hasKey("mute"))
scummVMMute = ConfMan.getBool("mute");
if (!scummVMMute) {
// Also change volume directly
_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, scummVMVolume);
_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, scummVMVolume);
}
}
void AgiEngine::setVolumeViaSystemSetting() {
int scummVMVolumeMusic = ConfMan.getInt("music_volume");
int scummVMVolumeSfx = ConfMan.getInt("sfx_volume");
bool scummVMMute = false;
int internalVolume = 0;
if (ConfMan.hasKey("mute"))
scummVMMute = ConfMan.getBool("mute");
// Clip user system setting
scummVMVolumeMusic = CLIP<int>(scummVMVolumeMusic, 0, Audio::Mixer::kMaxMixerVolume);
scummVMVolumeSfx = CLIP<int>(scummVMVolumeSfx, 0, Audio::Mixer::kMaxMixerVolume);
if (scummVMMute) {
scummVMVolumeMusic = 0;
scummVMVolumeSfx = 0;
}
// Now actually set it
_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, scummVMVolumeMusic);
_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, scummVMVolumeSfx);
// Take lowest volume to the scripts
if (scummVMVolumeMusic < scummVMVolumeSfx) {
internalVolume = scummVMVolumeMusic;
} else {
internalVolume = scummVMVolumeSfx;
}
// Change it to 0-15 range
internalVolume = (internalVolume + 1) * 15 / Audio::Mixer::kMaxMixerVolume;
// Reverse it
internalVolume = 15 - internalVolume;
// Put it into the VM variable. Directly set it, otherwise it would call a volume set call
_game.vars[VM_VAR_VOLUME] = internalVolume;
}
// In-Game timer, used for timer VM Variables
void AgiEngine::inGameTimerReset(uint32 newPlayTime) {
_passedPlayTimeCycles = 0;
_lastUsedPlayTimeInCycles = newPlayTime / 50;
_lastUsedPlayTimeInSeconds = newPlayTime / 1000;
setTotalPlayTime(newPlayTime);
}
void AgiEngine::inGameTimerPause() {
pauseEngine(true);
}
void AgiEngine::inGameTimerResume() {
pauseEngine(false);
}
uint32 AgiEngine::inGameTimerGet() {
return getTotalPlayTime();
}
// This is called, when one of the timer variables is read
// We calculate the latest variables, according to current official playtime
// This is also called in the main loop, because the game needs to be sync'd to 20 cycles per second
void AgiEngine::inGameTimerUpdate() {
uint32 curPlayTimeMilliseconds = inGameTimerGet();
uint32 curPlayTimeCycles = curPlayTimeMilliseconds / 50;
if (curPlayTimeCycles == _lastUsedPlayTimeInCycles) {
// No difference, skip updating
return;
}
// Increase passed cycles accordingly
int32 playTimeCycleDelta = curPlayTimeCycles - _lastUsedPlayTimeInCycles;
if (playTimeCycleDelta > 0) {
_passedPlayTimeCycles += playTimeCycleDelta;
}
_lastUsedPlayTimeInCycles = curPlayTimeCycles;
// Now calculate current play time in seconds
uint32 curPlayTimeSeconds = curPlayTimeMilliseconds / 1000;
if (curPlayTimeSeconds == _lastUsedPlayTimeInSeconds) {
// No difference, skip updating
return;
}
uint32 secondsLeft = 0;
byte curDays = 0;
byte curHours = 0;
byte curMinutes = 0;
byte curSeconds = 0;
curDays = curPlayTimeSeconds / 86400;
secondsLeft = curPlayTimeSeconds % 86400;
curHours = secondsLeft / 3600;
secondsLeft = secondsLeft % 3600;
curMinutes = secondsLeft / 60;
curSeconds = secondsLeft % 60;
// directly set them, otherwise we would go into an endless loop
_game.vars[VM_VAR_SECONDS] = curSeconds;
_game.vars[VM_VAR_MINUTES] = curMinutes;
_game.vars[VM_VAR_HOURS] = curHours;
_game.vars[VM_VAR_DAYS] = curDays;
_lastUsedPlayTimeInSeconds = curPlayTimeSeconds;
}
void AgiEngine::decrypt(uint8 *mem, int len) {
const uint8 *key;
int i;
key = (getFeatures() & GF_AGDS) ? (const uint8 *)CRYPT_KEY_AGDS
: (const uint8 *)CRYPT_KEY_SIERRA;
for (i = 0; i < len; i++)
*(mem + i) ^= *(key + (i % 11));
}
} // End of namespace Agi
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