Initial commit

engines/dragons/credits.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/>.
+ *
+ */
+
+#include "dragons/credits.h"
+#include "dragons/bigfile.h"
+#include "dragons/dragons.h"
+#include "dragons/screen.h"
+#include "dragons/font.h"
+
+namespace Dragons {
+
+void creditsUpdateFunction() {
+	getEngine()->_credits->update();
+}
+
+Credits::Credits(DragonsEngine *vm, FontManager *fontManager, BigfileArchive *bigfileArchive) : _vm(vm),
+				_fontManager(fontManager), _bigfileArchive(bigfileArchive), _surface(nullptr), _curPtr(nullptr) {
+	_running = false;
+	_updateCounter = 0;
+	_yOffset = 0;
+	_linesRemaining = 0x1a;
+
+	_creditsData = nullptr;
+	_dataLength = 0;
+	_curPosition = 0;
+}
+
+void Credits::start() {
+	_surface = new Graphics::Surface();
+	_surface->create(320, 208, Graphics::PixelFormat::createFormatCLUT8());
+	_updateCounter = 0x78;
+	_curPosition = 0;
+	_creditsData = _bigfileArchive->load("credits.txt", _dataLength);
+	_curPtr = (char *)_creditsData;
+	assert(_creditsData);
+	_vm->setVsyncUpdateFunction(creditsUpdateFunction);
+	_running = true;
+}
+
+bool Credits::isRunning() {
+	return _running;
+}
+
+void Credits::draw() {
+	if (_running) {
+		_vm->_screen->copyRectToSurface8bppWrappedY(*_surface, _vm->_screen->getPalette(2), _yOffset);
+	}
+}
+
+void Credits::cleanup() {
+	_vm->setVsyncUpdateFunction(nullptr);
+	_surface->free();
+	delete _surface;
+}
+
+void Credits::update() {
+	uint16 line[41];
+	if (_updateCounter == 0) {
+		_updateCounter = 2;
+		_yOffset = (_yOffset + 1) % 208;
+		if (_yOffset % 8 == 0) {
+			if (_curPosition < _dataLength) {
+				uint32 length = strlen(_curPtr);
+				debug(3, "Credit line: %s", _curPtr);
+				convertToWideChar(line, (byte *)_curPtr, 40);
+				_curPtr += length + 1;
+				_curPosition += length + 1;
+			} else {
+				if (_linesRemaining) {
+					_linesRemaining--;
+				}
+				convertToWideChar(line, (const byte *)" ", 40);
+			}
+			_fontManager->_fonts[0]->renderToSurface(_surface, 0, (_yOffset + 200) % 208, line, 40);
+
+		}
+
+	} else {
+		_updateCounter--;
+	}
+
+	if (_linesRemaining == 0) {
+		_running = false;
+		cleanup();
+	}
+
+}
+
+void Credits::convertToWideChar(uint16 *destBuf, const byte *text, uint16 maxLength) {
+	bool finished = false;
+	for (int i = 0; i < maxLength; i++) {
+		if (text[i] == 0) {
+			finished = true;
+		}
+		destBuf[i] = !finished ? text[i] : ' ';
+	}
+}
+
+} // End of namespace Dragons