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engines/icb/mouse.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1999-2000 Revolution Software Ltd.
+ * This code is based on source code created by Revolution Software,
+ * used with permission.
+ *
+ * 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/icb/common/px_common.h"
+#include "engines/icb/mouse.h"
+#include "engines/icb/debug.h"
+
+namespace ICB {
+
+#define MAX_MOUSE_EVENTS 16
+#define MOUSEFLASHFRAME 6
+
+typedef struct {
+	uint8 runTimeComp;  // type of runtime compression used for the frame data
+	uint8 noAnimFrames; // number of frames in the anim
+	int8 xHotSpot;
+	int8 yHotSpot;
+	uint8 mousew;
+	uint8 mouseh;
+} _mouseAnim;
+
+int32 mousex;
+int32 mousey;
+
+static uint8 mouseBacklog = 0;
+static uint8 mouseLogPos = 0;
+static _mouseEvent mouseLog[MAX_MOUSE_EVENTS];
+
+_mouseEvent *lastMouseEvent; // keep track of last mouse event for debugging
+
+void LogMouseEvent(uint16 buttons) {
+	_mouseEvent *me;
+
+	if (mouseBacklog == MAX_MOUSE_EVENTS - 1) { // We need to leave the one which is
+		// the current event alone!
+		return;
+	}
+
+	me = &mouseLog[(mouseBacklog + mouseLogPos) % MAX_MOUSE_EVENTS];
+	me->buttons = buttons;
+	mouseBacklog += 1;
+}
+
+int32 DecompressMouse(uint8 *decomp, uint8 *comp, int32 size) {
+	int32 i = 0;
+
+	while (i < size) {
+		if (*comp > 183) {
+			*decomp++ = *comp++;
+			i += 1;
+		} else {
+			memset(decomp, 0, *comp);
+			decomp += *comp;
+			i += *comp++;
+		}
+	}
+	return (1);
+}
+
+_mouseEvent *MouseEvent() {
+	_mouseEvent *me;
+
+	if (mouseBacklog) {
+		me = &mouseLog[mouseLogPos];
+		if (++mouseLogPos == MAX_MOUSE_EVENTS) {
+			mouseLogPos = 0;
+		}
+		mouseBacklog -= 1;
+
+		lastMouseEvent = me; // keep track of last mouse event for debugging
+
+		return (me);
+	}
+	return (nullptr);
+}
+
+} // End of namespace ICB