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engines/hugo/file_v3d.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/display.h"
+#include "hugo/text.h"
+#include "hugo/util.h"
+
+namespace Hugo {
+FileManager_v3d::FileManager_v3d(HugoEngine *vm) : FileManager_v2d(vm) {
+}
+
+FileManager_v3d::~FileManager_v3d() {
+}
+
+/**
+ * Read a PCX image into dib_a
+ */
+void FileManager_v3d::readBackground(const int screenIndex) {
+	debugC(1, kDebugFile, "readBackground(%d)", screenIndex);
+
+	_sceneryArchive1.seek((uint32) screenIndex * sizeof(SceneBlock), SEEK_SET);
+
+	SceneBlock sceneBlock;                          // Read a 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();
+
+	Seq *dummySeq;                                  // Image sequence structure for Read_pcx
+	if (screenIndex < 20) {
+		_sceneryArchive1.seek(sceneBlock._sceneOffset, SEEK_SET);
+		// Read the image into dummy seq and static dib_a
+		dummySeq = readPCX(_sceneryArchive1, nullptr, _vm->_screen->getFrontBuffer(), true, _vm->_text->getScreenNames(screenIndex));
+	} else {
+		_sceneryArchive2.seek(sceneBlock._sceneOffset, SEEK_SET);
+		// Read the image into dummy seq and static dib_a
+		dummySeq = readPCX(_sceneryArchive2, nullptr, _vm->_screen->getFrontBuffer(), true, _vm->_text->getScreenNames(screenIndex));
+	}
+	free(dummySeq);
+}
+
+/**
+ * Open "database" file (packed files)
+ */
+void FileManager_v3d::openDatabaseFiles() {
+	debugC(1, kDebugFile, "openDatabaseFiles");
+
+	if (!_stringArchive.open(getStringFilename()))
+		error("File not found: %s", getStringFilename());
+	if (!_sceneryArchive1.open("scenery1.dat"))
+		error("File not found: scenery1.dat");
+	if (!_sceneryArchive2.open("scenery2.dat"))
+		error("File not found: scenery2.dat");
+	if (!_objectsArchive.open(getObjectFilename()))
+		error("File not found: %s", getObjectFilename());
+}
+
+/**
+ * Close "Database" files
+ */
+void FileManager_v3d::closeDatabaseFiles() {
+	debugC(1, kDebugFile, "closeDatabaseFiles");
+
+	_stringArchive.close();
+	_sceneryArchive1.close();
+	_sceneryArchive2.close();
+	_objectsArchive.close();
+}
+
+/**
+ * Open and read in an overlay file, close file
+ */
+void FileManager_v3d::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;
+
+	if (screenNum < 20) {
+		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;
+		}
+
+		// Read in the overlay file using MAC Packbits.  (We're not proud!)
+		int16 k = 0;                                // byte count
+		do {
+			int8 data = _sceneryArchive1.readByte();// Read a code byte
+			if ((byte)data == 0x80)                 // Noop
+				;
+			else if (data >= 0) {                   // Copy next data+1 literally
+				for (i = 0; i <= (byte)data; i++, k++)
+					*tmpImage++ = _sceneryArchive1.readByte();
+			} else {                                // Repeat next byte -data+1 times
+				int16 j = _sceneryArchive1.readByte();
+
+				for (i = 0; i < (byte)(-data + 1); i++, k++)
+					*tmpImage++ = j;
+			}
+		} while (k < kOvlSize);
+	} else {
+		switch (overlayType) {
+		case kOvlBoundary:
+			_sceneryArchive2.seek(sceneBlock._boundaryOffset, SEEK_SET);
+			i = sceneBlock._boundaryLength;
+			break;
+		case kOvlOverlay:
+			_sceneryArchive2.seek(sceneBlock._overlayOffset, SEEK_SET);
+			i = sceneBlock._overlayLength;
+			break;
+		case kOvlBase:
+			_sceneryArchive2.seek(sceneBlock._baseOffset, SEEK_SET);
+			i = sceneBlock._baseLength;
+			break;
+		default:
+			error("Bad overlayType: %d", overlayType);
+			break;
+		}
+		if (i == 0) {
+			memset(image, 0, kOvlSize);
+			return;
+		}
+
+		// Read in the overlay file using MAC Packbits.  (We're not proud!)
+		int16 k = 0;                                // byte count
+		do {
+			int8 data = _sceneryArchive2.readByte();// Read a code byte
+			if ((byte)data == 0x80)                 // Noop
+				;
+			else if (data >= 0) {                   // Copy next data+1 literally
+				for (i = 0; i <= (byte)data; i++, k++)
+					*tmpImage++ = _sceneryArchive2.readByte();
+			} else {                                // Repeat next byte -data+1 times
+				int16 j = _sceneryArchive2.readByte();
+
+				for (i = 0; i < (byte)(-data + 1); i++, k++)
+					*tmpImage++ = j;
+			}
+		} while (k < kOvlSize);
+	}
+}
+} // End of namespace Hugo