MUTATIONOFJB: Load and draw scene background

1 files changed, 129 insertions, 0 deletions

diff --git a/engines/mutationofjb/room.cpp b/engines/mutationofjb/room.cpp
new file mode 100644
index 0000000000..e927971858
--- /dev/null
+++ b/engines/mutationofjb/room.cpp
@@ -0,0 +1,129 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "mutationofjb/room.h"
+#include "mutationofjb/encryptedfile.h"
+#include "graphics/screen.h"
+#include "engines/engine.h"
+#include "common/translation.h"
+
+namespace MutationOfJB {
+
+Room::Room(Graphics::Screen *screen) : _screen(screen) {}
+
+bool Room::load(uint8 roomNumber, bool roomB) {
+	EncryptedFile file;
+	Common::String fileName = Common::String::format("room%d%s.dat", roomNumber, roomB ? "b" : "");
+
+	file.open(fileName);
+
+	if (!file.isOpen()) {
+		Common::String errorMessage = Common::String::format(_("Unable to locate the '%s' engine data file."), fileName.c_str());
+		GUIErrorMessage(errorMessage);
+		warning("%s", errorMessage.c_str());
+
+		return false;
+	}
+
+	file.seek(0x80);
+
+	while (!file.eos()) {
+		// Record.
+		const uint32 length = file.readUint32LE();
+		uint8 info[4] = {0};
+		file.read(info, 4);
+
+		// TODO Find out what these are.
+		uint32 unknown;
+		unknown = file.readUint32LE();
+		unknown = file.readUint32LE();
+
+		// Subrecords.
+		if (info[0] == 0xFA && info[1] == 0xF1) {
+			for (int i = 0; i < info[2]; ++i) {
+				const uint32 subLength = file.readUint32LE();
+				const uint16 type = file.readUint16LE();
+
+				if (type == 0x0B) {
+					loadPalette(file);
+				} else if (type == 0x0F) {
+					loadBackground(file, subLength - 6);
+				}
+			}
+		}
+	}
+
+	file.close();
+
+	return true;
+}
+
+void Room::loadPalette(EncryptedFile &file) {
+	uint32 unknown;
+
+	// TODO Find out what this is.
+	unknown = file.readUint32LE();
+
+	uint8 palette[PALETTE_SIZE];
+	file.read(palette, PALETTE_SIZE);
+
+	for (int j = 0; j < PALETTE_SIZE; ++j) {
+		palette[j] <<= 2; // Uses 6-bit colors.
+	}
+
+	_screen->setPalette(palette);
+}
+
+void Room::loadBackground(EncryptedFile &file, uint32 size) {
+	_screen->clear();
+
+	uint8 * const pixels = static_cast<uint8 *>(_screen->getPixels());
+	uint8 *ptr = pixels;
+	uint32 readBytes = 0;
+
+	while (readBytes != size) {
+		uint8 no = file.readByte();
+		readBytes++;
+		while (no--) {
+			uint8 n = file.readByte();
+			readBytes++;
+			if (n < 0x80) {
+				// RLE - Copy color n times.
+				uint8 color = file.readByte();
+				readBytes++;
+				while(n--) {
+					*ptr++ = color;
+				}
+			} else {
+				// Take next 0x100 - n bytes as they are.
+				const uint32 rawlen = 0x100 - n;
+				file.read(ptr, rawlen);
+				readBytes += rawlen;
+				ptr += rawlen;
+			}
+		}
+	}
+
+	_screen->update();
+}
+
+}