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engines/saga2/vbacksav.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 "saga2/saga2.h"
+#include "saga2/vbacksav.h"
+
+namespace Saga2 {
+
+gBackSave::gBackSave(const Rect16 &extent) {
+	Rect16  displayRect(0, 0, 640, 480);
+
+	//  initialize the rectangle
+
+	_savedRegion = intersect(extent, displayRect);    // intersect with display size
+
+	//  Set up the image structure for the video page
+
+	_savedPixels._size.x = _savedRegion.width;
+	_savedPixels._size.y = _savedRegion.height;
+//	_savedPixels._data = (uint8 *)malloc(_savedPixels.bytes());
+	_savedPixels._data = (uint8 *)malloc(_savedPixels.bytes());
+
+	//  Initialize the graphics port
+
+	setMap(&_savedPixels);
+	setMode(kDrawModeReplace);
+
+	_saved = false;
+}
+
+gBackSave::~gBackSave() {
+	free(_savedPixels._data);
+}
+
+void gBackSave::save(gDisplayPort &port) {
+	if (!_saved && _savedPixels._data) {
+		port._protoPage.readPixels(_savedRegion, _savedPixels._data, _savedPixels._size.x);
+		_saved = true;
+	}
+}
+
+void gBackSave::restore(gDisplayPort &port) {
+	if (_saved && _savedPixels._data) {
+		port._protoPage.writePixels(_savedRegion, _savedPixels._data, _savedPixels._size.x);
+		_saved = false;
+	}
+}
+
+} // end of namespace Saga2