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Diffstat (limited to 'engines/wintermute/base/base_fader.cpp')
| -rw-r--r-- | engines/wintermute/base/base_fader.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/engines/wintermute/base/base_fader.cpp b/engines/wintermute/base/base_fader.cpp new file mode 100644 index 0000000000..985718fcab --- /dev/null +++ b/engines/wintermute/base/base_fader.cpp @@ -0,0 +1,195 @@ +/* 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. + * + */ + +/* + * This file is based on WME Lite. + * http://dead-code.org/redir.php?target=wmelite + * Copyright (c) 2011 Jan Nedoma + */ + +#include "engines/wintermute/base/base_fader.h" +#include "engines/wintermute/base/base_game.h" +#include "engines/wintermute/base/gfx/base_renderer.h" +#include "common/util.h" + +namespace Wintermute { + +////////////////////////////////////////////////////////////////////// +// Construction/Destruction +////////////////////////////////////////////////////////////////////// + +IMPLEMENT_PERSISTENT(BaseFader, false) + +////////////////////////////////////////////////////////////////////////// +BaseFader::BaseFader(BaseGame *inGame) : BaseObject(inGame) { + _active = false; + _red = _green = _blue = 0; + _currentAlpha = 0x00; + _sourceAlpha = 0; + _targetAlpha = 0; + _duration = 1000; + _startTime = 0; + _system = false; +} + + +////////////////////////////////////////////////////////////////////////// +BaseFader::~BaseFader() { + +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::update() { + if (!_active) { + return STATUS_OK; + } + + int alphaDelta = _targetAlpha - _sourceAlpha; + + uint32 time; + + if (_system) { + time = g_system->getMillis() - _startTime; + } else { + time = _gameRef->_timer - _startTime; + } + + if (time >= _duration) { + _currentAlpha = _targetAlpha; + } else { + _currentAlpha = (byte)(_sourceAlpha + (float)time / (float)_duration * alphaDelta); + } + _currentAlpha = MIN((unsigned char)255, MAX(_currentAlpha, (byte)0)); // TODO: clean + + _ready = time >= _duration; + if (_ready && _currentAlpha == 0x00) { + _active = false; + } + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::display() { + if (!_active) { + return STATUS_OK; + } + + if (_currentAlpha > 0x00) { + _gameRef->_renderer->fadeToColor(_red, _green, _blue, _currentAlpha); + } + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::deactivate() { + _active = false; + _ready = true; + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::fadeIn(uint32 sourceColor, uint32 duration, bool system) { + _ready = false; + _active = true; + + _red = RGBCOLGetR(sourceColor); + _green = RGBCOLGetG(sourceColor); + _blue = RGBCOLGetB(sourceColor); + + _sourceAlpha = RGBCOLGetA(sourceColor); + _targetAlpha = 0; + + _duration = duration; + _system = system; + + if (_system) { + _startTime = g_system->getMillis(); + } else { + _startTime = _gameRef->_timer; + } + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::fadeOut(uint32 targetColor, uint32 duration, bool system) { + _ready = false; + _active = true; + + _red = RGBCOLGetR(targetColor); + _green = RGBCOLGetG(targetColor); + _blue = RGBCOLGetB(targetColor); + + //_sourceAlpha = 0; + _sourceAlpha = _currentAlpha; + _targetAlpha = RGBCOLGetA(targetColor); + + _duration = duration; + _system = system; + + if (_system) { + _startTime = g_system->getMillis(); + } else { + _startTime = _gameRef->_timer; + } + + + return STATUS_OK; +} + + +////////////////////////////////////////////////////////////////////////// +uint32 BaseFader::getCurrentColor() { + return BYTETORGBA(_red, _green, _blue, _currentAlpha); +} + + + +////////////////////////////////////////////////////////////////////////// +bool BaseFader::persist(BasePersistenceManager *persistMgr) { + BaseObject::persist(persistMgr); + + persistMgr->transfer(TMEMBER(_active)); + persistMgr->transfer(TMEMBER(_blue)); + persistMgr->transfer(TMEMBER(_currentAlpha)); + persistMgr->transfer(TMEMBER(_duration)); + persistMgr->transfer(TMEMBER(_green)); + persistMgr->transfer(TMEMBER(_red)); + persistMgr->transfer(TMEMBER(_sourceAlpha)); + persistMgr->transfer(TMEMBER(_startTime)); + persistMgr->transfer(TMEMBER(_targetAlpha)); + persistMgr->transfer(TMEMBER(_system)); + + if (_system && !persistMgr->getIsSaving()) { + _startTime = 0; + } + + return STATUS_OK; +} + +} // end of namespace Wintermute |