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Diffstat (limited to 'engines/zvision/graphics/effects/fog.cpp')
| -rw-r--r-- | engines/zvision/graphics/effects/fog.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/engines/zvision/graphics/effects/fog.cpp b/engines/zvision/graphics/effects/fog.cpp new file mode 100644 index 0000000000..7b65f60f24 --- /dev/null +++ b/engines/zvision/graphics/effects/fog.cpp @@ -0,0 +1,173 @@ +/* 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/fog.h" + +#include "zvision/zvision.h" +#include "zvision/graphics/render_manager.h" +#include "zvision/scripting/script_manager.h" + +namespace ZVision { + +FogFx::FogFx(ZVision *engine, uint32 key, Common::Rect region, bool ported, EffectMap *Map, const Common::String &clouds): + GraphicsEffect(engine, key, region, ported) { + + _map = Map; + + _r = 0; + _g = 0; + _b = 0; + + _pos = 0; + + if (_engine->getSearchManager()->hasFile(clouds)) + _engine->getRenderManager()->readImageToSurface(clouds, _fog); + else + _engine->getRenderManager()->readImageToSurface("cloud.tga", _fog); + + _mp.resize(_fog.h); + for (int16 i = 0; i < _fog.h; i++) { + _mp[i].resize(_fog.w); + for (int16 j = 0; j < _fog.w; j++) + _mp[i][j] = true; + } + + for (uint8 i = 0; i < 32; i++) + _colorMap[i] = 0; +} + +FogFx::~FogFx() { + if (_map) + delete _map; + + for (uint16 i = 0; i < _mp.size(); i++) + _mp[i].clear(); + _mp.clear(); +} + +const Graphics::Surface *FogFx::draw(const Graphics::Surface &srcSubRect) { + _surface.copyFrom(srcSubRect); + EffectMap::iterator it = _map->begin(); + + uint32 cnt = 0; + + 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) { + // Not 100% equivalent, but looks nice and not buggy + uint8 sr, sg, sb; + _engine->_resourcePixelFormat.colorToRGB(lineBuf[i], sr, sg, sb); + uint16 fogColor = *(uint16 *)_fog.getBasePtr((i + _pos) % _fog.w, j); + uint8 dr, dg, db; + _engine->_resourcePixelFormat.colorToRGB(_colorMap[fogColor & 0x1F], dr, dg, db); + uint16 fr = dr + sr; + if (fr > 255) + fr = 255; + uint16 fg = dg + sg; + if (fg > 255) + fg = 255; + uint16 fb = db + sb; + if (fb > 255) + fb = 255; + lineBuf[i] = _engine->_resourcePixelFormat.RGBToColor(fr, fg, fb); + } + cnt++; + if (cnt >= it->count) { + it++; + cnt = 0; + } + if (it == _map->end()) + break; + } + if (it == _map->end()) + break; + } + + return &_surface; +} + +void FogFx::update() { + _pos += _engine->getScriptManager()->getStateValue(StateKey_EF9_Speed); + _pos %= _fog.w; + + uint8 dr = _engine->getScriptManager()->getStateValue(StateKey_EF9_R); + uint8 dg = _engine->getScriptManager()->getStateValue(StateKey_EF9_G); + uint8 db = _engine->getScriptManager()->getStateValue(StateKey_EF9_B); + dr = CLIP((int)dr, 0, 31); + dg = CLIP((int)dg, 0, 31); + db = CLIP((int)db, 0, 31); + + if (dr != _r || dg != _g || db != _b) { + if (_r > dr) + _r--; + else if (_r < dr) + _r++; + + if (_g > dg) + _g--; + else if (_g < dg) + _g++; + + if (_b > db) + _b--; + else if (_b < db) + _b++; + + // Not 100% equivalent, but looks nice and not buggy + + _colorMap[31] = _engine->_resourcePixelFormat.RGBToColor(_r << 3, _g << 3, _b << 3); + + for (uint8 i = 0; i < 31; i++) { + float perc = (float)i / 31.0; + uint8 cr = (uint8)((float)_r * perc); + uint8 cg = (uint8)((float)_g * perc); + uint8 cb = (uint8)((float)_b * perc); + _colorMap[i] = _engine->_resourcePixelFormat.RGBToColor(cr << 3, cg << 3, cb << 3); + } + } + + for (uint16 j = 0; j < _fog.h; j++) { + uint16 *pix = (uint16 *)_fog.getBasePtr(0, j); + + for (uint16 i = 0; i < _fog.w; i++) { + if (_mp[j][i]) { + if ((pix[i] & 0x1F) == 0x1F) { + pix[i]--; + _mp[j][i] = false; + } else + pix[i]++; + } else { + if ((pix[i] & 0x1F) == 0) { + pix[i]++; + _mp[j][i] = true; + } else + pix[i]--; + } + } + } +} + +} // End of namespace ZVision |