Initial commit

engines/asylum/system/cursor.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 "asylum/system/cursor.h"
+
+#include "asylum/system/graphics.h"
+
+#include "asylum/asylum.h"
+
+#include "graphics/cursorman.h"
+
+namespace Asylum {
+
+const uint32 CURSOR_UPDATE_TICKS = 100;
+
+Cursor::Cursor(AsylumEngine *engine) : _vm(engine),
+	_cursorRes(nullptr), _nextTick(0), _frameStep(0),
+	_graphicResourceId(kResourceNone), _currentFrame(0), _lastFrameIndex(0), _counter(0), _animation(kCursorAnimationNone),
+	_forceHide(false) {
+}
+
+Cursor::~Cursor() {
+	delete _cursorRes;
+}
+
+void Cursor::hide() const {
+	CursorMan.showMouse(false);
+}
+
+void Cursor::show() const {
+	if (!_forceHide)
+		CursorMan.showMouse(true);
+}
+
+void Cursor::set(ResourceId resourceId, int32 cnt, CursorAnimation anim, int32 frames) {
+	bool wasHidden = isHidden();
+
+	hide();
+
+	delete _cursorRes;
+	_cursorRes = new GraphicResource(_vm, resourceId);
+
+	// Set next update
+	_nextTick = _vm->getTick() + CURSOR_UPDATE_TICKS;
+
+	// Get frame count
+	if (frames >= 0)
+		_lastFrameIndex = (uint32)frames;
+	else
+		_lastFrameIndex = _cursorRes->count() - 1;
+
+	this->_graphicResourceId = resourceId;
+	this->_animation = anim;
+	this->_counter = cnt;
+	_currentFrame = 0;
+	_frameStep = 1;
+
+	// Do not animate if no frames (and the other way around)
+	if (_lastFrameIndex == 0 || anim == kCursorAnimationNone) {
+		_lastFrameIndex = 0;
+		_animation = kCursorAnimationNone;
+	}
+
+	if (_lastFrameIndex >= _cursorRes->count())
+		_lastFrameIndex = _cursorRes->count() - 1;
+
+	update();
+
+	if (!wasHidden)
+		show();
+}
+
+void Cursor::update() {
+	if (!_cursorRes)
+		error("[Cursor::update] Cursor resources not initialized properly!");
+
+	Common::Point hotspot = getHotspot(_currentFrame);
+
+	GraphicFrame *frame = _cursorRes->getFrame(_currentFrame);
+	CursorMan.replaceCursor(frame->surface, hotspot.x, hotspot.y, 0);
+}
+
+void Cursor::animate() {
+	if (isHidden() || !_animation || _nextTick > _vm->getTick())
+		return;
+
+	bool notifyHandler = false;
+	int32 frame = 0;
+
+	if (_animation == kCursorAnimationLinear) {
+		if (_currentFrame == _lastFrameIndex) {
+			_currentFrame = frame = 0;
+		} else {
+			_currentFrame += _frameStep;
+			frame = _currentFrame;
+		}
+	} else if (_animation == kCursorAnimationMirror) {
+		_currentFrame += _frameStep;
+		frame = _currentFrame;
+
+		if (_currentFrame == 0 || _currentFrame == _lastFrameIndex)
+			_frameStep = -_frameStep;
+	}
+
+	if (frame == 0) {
+		if (_counter != -1) {
+			--_counter;
+
+			if (!_counter) {
+				_animation = kCursorAnimationNone;
+				notifyHandler = true;
+			}
+		}
+	}
+
+	_nextTick = _vm->getTick() + CURSOR_UPDATE_TICKS;
+
+	if (notifyHandler)
+		_vm->notify(EVENT_ASYLUM_CURSOR);
+
+	update();
+}
+
+Common::Point Cursor::getHotspot(uint32 frameIndex) {
+	if (!_cursorRes)
+		error("[Cursor::getHotspot] Cursor resource not initialized properly");
+
+	Common::Point point;
+	uint32 resFlags = _cursorRes->getData().flags;
+
+	if (BYTE1(resFlags) & 0x10) {
+		// XXX removed a check for frameIndex >= 0 as it will always
+		// evaluate to true since frameIndex is unsigned
+		if (frameIndex > _cursorRes->count()) {
+			GraphicFrame *frame = _cursorRes->getFrame(_currentFrame);
+
+			point.x = frame->x;
+			point.y = frame->y;
+		}
+	}
+
+	return point;
+}
+
+bool Cursor::isHidden() const {
+	return !CursorMan.isVisible();
+}
+
+const Common::Point Cursor::position() const {
+	return g_system->getEventManager()->getMousePos();
+}
+
+} // end of namespace Asylum