Initial commit

engines/zvision/graphics/effects/fog.cpp

@@ -0,0 +1,170 @@
+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/scummsys.h"
+#include "zvision/zvision.h"
+#include "zvision/graphics/render_manager.h"
+#include "zvision/graphics/effects/fog.h"
+#include "zvision/scripting/script_manager.h"
+
+namespace ZVision {
+
+FogFx::FogFx(ZVision *engine, uint32 key, Common::Rect region, bool ported, EffectMap *Map, const Common::Path &clouds):
+	GraphicsEffect(engine, key, region, ported) {
+
+	_map = Map;
+
+	_r = 0;
+	_g = 0;
+	_b = 0;
+
+	_pos = 0;
+
+	if (SearchMan.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;
+	debugC(2, kDebugEffect, "Updating fog effect");
+	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