Initial commit

engines/hugo/file_v1w.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/>.
+ *
+ */
+
+/*
+ * This code is based on original Hugo Trilogy source code
+ *
+ * Copyright (c) 1989-1995 David P. Gray
+ *
+ */
+
+#include "common/debug.h"
+#include "common/system.h"
+#include "common/textconsole.h"
+
+#include "hugo/hugo.h"
+#include "hugo/file.h"
+#include "hugo/util.h"
+
+namespace Hugo {
+FileManager_v1w::FileManager_v1w(HugoEngine *vm) : FileManager_v2w(vm) {
+}
+
+FileManager_v1w::~FileManager_v1w() {
+}
+
+/**
+ * Open and read in an overlay file, close file
+ */
+void FileManager_v1w::readOverlay(const int screenNum, ImagePtr image, OvlType overlayType) {
+	debugC(1, kDebugFile, "readOverlay(%d, ...)", screenNum);
+
+	ImagePtr tmpImage = image;                      // temp ptr to overlay file
+	_sceneryArchive1.seek((uint32)screenNum * sizeof(SceneBlock), SEEK_SET);
+
+	SceneBlock sceneBlock;                          // Database header entry
+	sceneBlock._sceneOffset = _sceneryArchive1.readUint32LE();
+	sceneBlock._sceneLength = _sceneryArchive1.readUint32LE();
+	sceneBlock._boundaryOffset = _sceneryArchive1.readUint32LE();
+	sceneBlock._boundaryLength = _sceneryArchive1.readUint32LE();
+	sceneBlock._overlayOffset = _sceneryArchive1.readUint32LE();
+	sceneBlock._overlayLength = _sceneryArchive1.readUint32LE();
+	sceneBlock._baseOffset = _sceneryArchive1.readUint32LE();
+	sceneBlock._baseLength = _sceneryArchive1.readUint32LE();
+
+	uint32 i = 0;
+	switch (overlayType) {
+	case kOvlBoundary:
+		_sceneryArchive1.seek(sceneBlock._boundaryOffset, SEEK_SET);
+		i = sceneBlock._boundaryLength;
+		break;
+	case kOvlOverlay:
+		_sceneryArchive1.seek(sceneBlock._overlayOffset, SEEK_SET);
+		i = sceneBlock._overlayLength;
+		break;
+	case kOvlBase:
+		_sceneryArchive1.seek(sceneBlock._baseOffset, SEEK_SET);
+		i = sceneBlock._baseLength;
+		break;
+	default:
+		error("Bad overlayType: %d", overlayType);
+		break;
+	}
+	if (i == 0) {
+		memset(image, 0, kOvlSize);
+		return;
+	}
+	_sceneryArchive1.read(tmpImage, kOvlSize);
+}
+
+} // End of namespace Hugo