Initial commit

engines/crab/ui/AlphaImage.cpp

@@ -0,0 +1,76 @@
+/* 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 the CRAB engine
+ *
+ * Copyright (c) Arvind Raja Yadav
+ *
+ * Licensed under MIT
+ *
+ */
+
+#include "crab/crab.h"
+#include "crab/image/ImageManager.h"
+#include "crab/ui/AlphaImage.h"
+#include "crab/text/TextManager.h"
+
+namespace Crab {
+
+using namespace pyrodactyl::ui;
+using namespace pyrodactyl::image;
+
+void AlphaImage::load(rapidxml::xml_node<char> *node, const bool &echo) {
+	_pos.load(node, echo);
+	loadImgKey(_img, "img", node, echo);
+
+	loadNum(alpha._min, "min", node);
+	loadNum(alpha._max, "max", node);
+	loadNum(alpha._change, "inc", node);
+
+	alpha._cur = alpha._min + g_engine->getRandomNumber(alpha._max - alpha._min - 1);
+}
+
+void AlphaImage::internalEvents() {
+	if (alpha._inc) {
+		alpha._cur += alpha._change;
+		if (alpha._cur >= alpha._max) {
+			alpha._cur = alpha._max;
+			alpha._inc = false;
+		}
+	} else {
+		alpha._cur -= alpha._change;
+		if (alpha._cur <= alpha._min) {
+			alpha._cur = alpha._min;
+			alpha._inc = true;
+		}
+	}
+
+	if (g_engine->_imageManager->validTexture(_img))
+		g_engine->_imageManager->getTexture(_img).alpha(alpha._cur);
+}
+
+void AlphaImage::draw(const int &xOffset, const int &yOffset) {
+	if (g_engine->_imageManager->validTexture(_img))
+		g_engine->_imageManager->getTexture(_img).draw(_pos.x + xOffset, _pos.y + yOffset);
+}
+
+} // End of namespace Crab