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engines/nancy/action/puzzle/mouselightpuzzle.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 "engines/nancy/nancy.h"
+#include "engines/nancy/graphics.h"
+#include "engines/nancy/resource.h"
+#include "engines/nancy/sound.h"
+#include "engines/nancy/input.h"
+#include "engines/nancy/util.h"
+
+#include "engines/nancy/state/scene.h"
+#include "engines/nancy/action/puzzle/mouselightpuzzle.h"
+
+namespace Nancy {
+namespace Action {
+
+void MouseLightPuzzle::init() {
+	Common::Rect screenBounds = NancySceneState.getViewport().getBounds();
+
+	Graphics::ManagedSurface baseImage;
+	g_nancy->_resource->loadImage(_imageName, baseImage);
+
+	_drawSurface.create(screenBounds.width(), screenBounds.height(), g_nancy->_graphics->getTransparentPixelFormat());
+	_drawSurface.blitFrom(baseImage);
+	((Graphics::Surface)_drawSurface).setAlpha(0);
+
+	setVisible(true);
+	moveTo(screenBounds);
+
+	_maskCircle.create(_radius * 2, _radius * 2, g_nancy->_graphics->getInputPixelFormat());
+	_maskCircle.clear();
+
+	if (_smoothEdges) {
+		for (int y = -_radius; y < _radius; ++y) {
+			for (int x = -_radius; x < _radius; ++x) {
+				_maskCircle.setPixel(x + _radius, y + _radius, (uint16)(expf(-(float)((y * y + x * x) * (y * y + x * x)) / (float)(_radius * _radius * _radius * _radius / 4)) * 0xFF));
+			}
+		}
+	} else {
+		for (int y = -_radius; y < _radius; ++y) {
+			for (int x = -_radius; x < _radius; ++x) {
+				if (sqrt(y * y + x * x) < _radius) {
+					_maskCircle.setPixel(x + _radius, y + _radius, 0xFF);
+				}
+			}
+		}
+	}
+}
+
+void MouseLightPuzzle::execute() {
+	if (_state == kBegin) {
+		init();
+		registerGraphics();
+		_state = kRun;
+	}
+}
+
+void MouseLightPuzzle::readData(Common::SeekableReadStream &stream) {
+	readFilename(stream, _imageName);
+	_radius = stream.readByte();
+	_smoothEdges = stream.readByte();
+}
+
+void MouseLightPuzzle::handleInput(NancyInput &input) {
+	if (_state != kRun) {
+		return;
+	}
+
+	if (_lastMousePos == input.mousePos) {
+		return;
+	}
+
+	_lastMousePos = input.mousePos;
+	((Graphics::Surface)_drawSurface).setAlpha(0);
+	_needsRedraw = true;
+
+	Common::Rect vpScreenPos = NancySceneState.getViewport().convertViewportToScreen(_screenPosition);
+	if (!vpScreenPos.contains(input.mousePos)) {
+		return;
+	}
+
+	Common::Point blitDestPoint = input.mousePos;
+	blitDestPoint -= { vpScreenPos.left, vpScreenPos.top };
+	blitDestPoint -= { _radius, _radius };
+
+	Common::Rect srcRect = _maskCircle.getBounds();
+	Common::Rect::getBlitRect(blitDestPoint, srcRect, _drawSurface.getBounds());
+
+	// Copy over the transparency to the draw surface
+	for (int y = srcRect.top; y < srcRect.bottom; ++y) {
+		uint32 *drawSurfPtr = (uint32 *)_drawSurface.getBasePtr(blitDestPoint.x, y + blitDestPoint.y - srcRect.top);
+		uint16 *circlePtr = (uint16 *)_maskCircle.getBasePtr(srcRect.left, y);
+		for (int x = srcRect.left; x < srcRect.right; ++x) {
+			*drawSurfPtr = (*drawSurfPtr & 0xFFFFFF00) | (byte)*circlePtr;
+			++drawSurfPtr;
+			++circlePtr;
+		}
+	}
+}
+
+} // End of namespace Action
+} // End of namespace Nancy