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Diffstat (limited to 'engines/zvision/graphics/effects/wave.cpp')
| -rw-r--r-- | engines/zvision/graphics/effects/wave.cpp | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/engines/zvision/graphics/effects/wave.cpp b/engines/zvision/graphics/effects/wave.cpp new file mode 100644 index 0000000000..d2887b3112 --- /dev/null +++ b/engines/zvision/graphics/effects/wave.cpp @@ -0,0 +1,145 @@ +/* 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/wave.h" + +#include "zvision/zvision.h" +#include "zvision/graphics/render_manager.h" + +namespace ZVision { + +WaveFx::WaveFx(ZVision *engine, uint32 key, Common::Rect region, bool ported, int16 frames, int16 centerX, int16 centerY, float ampl, float waveln, float spd): + GraphicsEffect(engine, key, region, ported) { + + _frame = 0; + _frameCount = frames; + + _ampls.resize(_frameCount); + _halfWidth = _region.width() / 2; + _halfHeight = _region.height() / 2; + + int32 frmsize = _halfWidth * _halfHeight; + + float phase = 0; + + int16 quarterWidth = _halfWidth / 2; + int16 quarterHeight = _halfHeight / 2; + + for (int16 i = 0; i < _frameCount; i++) { + _ampls[i].resize(frmsize); + + for (int16 y = 0; y < _halfHeight; y++) + for (int16 x = 0; x < _halfWidth; x++) { + int16 dx = (x - quarterWidth); + int16 dy = (y - quarterHeight); + + _ampls[i][x + y * _halfWidth] = (int8)(ampl * sin(sqrt(dx * dx / (float)centerX + dy * dy / (float)centerY) / (-waveln * 3.1415926) + phase)); + } + phase += spd; + } +} + +WaveFx::~WaveFx() { + for (uint16 i = 0; i < _ampls.size(); i++) + _ampls[i].clear(); + _ampls.clear(); +} + +const Graphics::Surface *WaveFx::draw(const Graphics::Surface &srcSubRect) { + for (int16 y = 0; y < _halfHeight; y++) { + uint16 *abc = (uint16 *)_surface.getBasePtr(0, y); + uint16 *abc2 = (uint16 *)_surface.getBasePtr(0, _halfHeight + y); + uint16 *abc3 = (uint16 *)_surface.getBasePtr(_halfWidth, y); + uint16 *abc4 = (uint16 *)_surface.getBasePtr(_halfWidth, _halfHeight + y); + + for (int16 x = 0; x < _halfWidth; x++) { + int8 amnt = _ampls[_frame][x + _halfWidth * y]; + + int16 nX = x + amnt; + int16 nY = y + amnt; + + if (nX < 0) + nX = 0; + if (nX >= _region.width()) + nX = _region.width() - 1; + if (nY < 0) + nY = 0; + if (nY >= _region.height()) + nY = _region.height() - 1; + *abc = *(const uint16 *)srcSubRect.getBasePtr(nX, nY); + + nX = x + amnt + _halfWidth; + nY = y + amnt; + + if (nX < 0) + nX = 0; + if (nX >= _region.width()) + nX = _region.width() - 1; + if (nY < 0) + nY = 0; + if (nY >= _region.height()) + nY = _region.height() - 1; + *abc3 = *(const uint16 *)srcSubRect.getBasePtr(nX, nY); + + nX = x + amnt; + nY = y + amnt + _halfHeight; + + if (nX < 0) + nX = 0; + if (nX >= _region.width()) + nX = _region.width() - 1; + if (nY < 0) + nY = 0; + if (nY >= _region.height()) + nY = _region.height() - 1; + *abc2 = *(const uint16 *)srcSubRect.getBasePtr(nX, nY); + + nX = x + amnt + _halfWidth; + nY = y + amnt + _halfHeight; + + if (nX < 0) + nX = 0; + if (nX >= _region.width()) + nX = _region.width() - 1; + if (nY < 0) + nY = 0; + if (nY >= _region.height()) + nY = _region.height() - 1; + *abc4 = *(const uint16 *)srcSubRect.getBasePtr(nX, nY); + + abc++; + abc2++; + abc3++; + abc4++; + } + } + + return &_surface; +} + +void WaveFx::update() { + _frame = (_frame + 1) % _frameCount; +} + +} // End of namespace ZVision |