Initial commit

engines/saga2/gpointer.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
+ * aint32 with this program; if not, write to the Free Software
+ *
+ *
+ * Based on the original sources
+ *   Faery Tale II -- The Halls of the Dead
+ *   (c) 1993-1996 The Wyrmkeep Entertainment Co.
+ */
+
+#include "graphics/cursorman.h"
+
+#include "saga2/saga2.h"
+#include "saga2/gpointer.h"
+
+namespace Saga2 {
+
+gMousePointer::gMousePointer(gDisplayPort &port) {
+	_hideCount = 0;                          // pointer not hidden
+
+	//  initialize coords
+	_offsetPosition.x = _offsetPosition.y = 0;
+	_currentPosition.x = _currentPosition.y = 0;
+
+	//  a backsave extent of 0 means not saved
+	_saveExtent.width = _saveExtent.height = 0;
+	_shown = 0;
+
+	//  set up the backsave port
+	_savePort.setMap(&_saveMap);
+	_savePort.setMode(kDrawModeReplace);
+
+	_videoPort = &port;
+
+	//  no imagery at this time.
+	_pointerImage = nullptr;
+}
+
+gMousePointer::~gMousePointer() {
+	if (_saveMap._data)
+		free(_saveMap._data);
+}
+
+//  Init & status check
+bool gMousePointer::init(Point16 pointerLimits) {
+	return true;
+}
+
+//  Private routine to draw the mouse pointer image
+void gMousePointer::draw() {
+	if (_hideCount < 1) {
+		CursorMan.showMouse(true);
+		_shown = 1;
+	} else
+		_shown = 0;
+}
+
+//  Private routine to restore the mouse pointer image
+void gMousePointer::restore() {
+	if (_shown) {
+		//  blit from the saved map to the current position.
+
+		CursorMan.showMouse(false);
+
+		//  A height of zero means backsave is invalid
+
+		_shown = 0;
+	}
+}
+
+//  Makes the mouse pointer visible
+void gMousePointer::show() {
+	assert(_hideCount > 0);
+
+	if (--_hideCount == 0) {
+		draw();
+	}
+}
+
+//  Makes the mouse pointer invisible
+void gMousePointer::hide() {
+	if (_hideCount++ == 0) {
+		restore();
+	}
+}
+
+//  Makes the mouse pointer visible
+void gMousePointer::show(gPort &port, Rect16 r) {
+	Point16         org = port.getOrigin();
+
+	r.x += org.x;
+	r.y += org.y;
+
+	if (_saveExtent.overlap(r)) {
+		if (--_hideCount == 0) {
+			draw();
+		}
+
+	}
+}
+
+//  Makes the mouse pointer visible
+int gMousePointer::manditoryShow() {
+	int rv = 0;
+	while (_hideCount > 0) {
+		show();
+		rv++;
+	}
+	while (_hideCount < 0) {
+		hide();
+		rv--;
+	}
+	if (!_shown)
+		draw();
+	return rv;
+}
+
+
+//  Makes the mouse pointer invisible
+void gMousePointer::hide(gPort &port, Rect16 r) {
+	Point16         org = port.getOrigin();
+
+	r.x += org.x;
+	r.y += org.y;
+
+	if (_saveExtent.overlap(r)) {
+		if (_hideCount++ == 0) {
+			restore();
+			CursorMan.showMouse(false);
+		}
+	}
+}
+
+//  Moves the mouse pointer to a new position
+void gMousePointer::move(Point16 pos) {
+	Point16         offsetPos = pos + _offsetPosition;
+
+	if (offsetPos != _currentPosition) {
+		restore();
+		_currentPosition = offsetPos;
+		draw();
+	}
+}
+
+//  Sets the mouse pointer imagery
+void gMousePointer::setImage(
+    gPixelMap       &img,
+    int             x,
+    int             y) {
+	Point16         pos = _currentPosition - _offsetPosition;
+
+	if (_pointerImage != &img
+	        ||  x != _offsetPosition.x
+	        ||  y != _offsetPosition.y
+	        ||  img._size != _saveMap._size) {
+		_offsetPosition.x = x;
+		_offsetPosition.y = y;
+
+		hide();
+		if (_saveMap._data)
+			free(_saveMap._data);
+		_saveMap._size = img._size;
+		_saveMap._data = (uint8 *)malloc(img.bytes());
+		_pointerImage = &img;
+		_currentPosition = pos + _offsetPosition;
+
+		CursorMan.replaceCursor(img._data, img._size.x, img._size.y, -x, -y, 0);
+		CursorMan.showMouse(true);
+		show();
+	}
+}
+
+} // end of namespace Saga2