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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/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):
Effect(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] = 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
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