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engines/zvision/graphics/effects/light.cpp

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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 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/light.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