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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/scummsys.h"
#include "zvision/graphics/effects/light.h"
#include "zvision/zvision.h"
#include "zvision/graphics/render_manager.h"
namespace ZVision {
LightFx::LightFx(ZVision *engine, uint32 key, Common::Rect region, bool ported, EffectMap *Map, int8 delta, int8 minD, int8 maxD):
GraphicsEffect(engine, key, region, ported) {
_map = Map;
_delta = delta;
_up = true;
_pos = 0;
_minD = minD;
if (_minD < -delta)
_minD = -delta;
_maxD = maxD;
if (_maxD > delta)
_maxD = delta;
}
LightFx::~LightFx() {
if (_map)
delete _map;
}
const Graphics::Surface *LightFx::draw(const Graphics::Surface &srcSubRect) {
_surface.copyFrom(srcSubRect);
EffectMap::iterator it = _map->begin();
uint32 cnt = 0;
uint32 dcolor = 0;
if (_pos < 0) {
uint8 cc = ((-_pos) & 0x1F) << 3;
dcolor = _engine->_resourcePixelFormat.RGBToColor(cc, cc, cc);
} else {
uint8 cc = (_pos & 0x1F) << 3;
dcolor = _engine->_resourcePixelFormat.RGBToColor(cc, cc, cc);
}
for (uint16 j = 0; j < _surface.h; j++) {
uint16 *lineBuf = (uint16 *)_surface.getBasePtr(0, j);
for (uint16 i = 0; i < _surface.w; i++) {
if (it->inEffect) {
if (_pos < 0) {
lineBuf[i] -= dcolor;
} else {
lineBuf[i] += dcolor;
}
}
cnt++;
if (cnt >= it->count) {
it++;
cnt = 0;
}
if (it == _map->end())
break;
}
if (it == _map->end())
break;
}
return &_surface;
}
void LightFx::update() {
if (_up)
_pos++;
else
_pos--;
if (_pos <= _minD) {
_up = !_up;
_pos = _minD;
} else if (_pos >= _maxD) {
_up = !_up;
_pos = _maxD;
}
}
} // End of namespace ZVision
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