Initial commit

engines/crab/animation/AnimationFrame.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 the CRAB engine
+ *
+ * Copyright (c) Arvind Raja Yadav
+ *
+ * Licensed under MIT
+ *
+ */
+
+#include "crab/crab.h"
+#include "crab/animation/AnimationFrame.h"
+
+namespace Crab {
+
+using namespace pyrodactyl::image;
+using namespace pyrodactyl::anim;
+
+AnimationFrame::AnimationFrame(rapidxml::xml_node<char> *node) : AnimationFrame() {
+	_eff = AnimationEffect(node);
+	Vector2i::load(node);
+	loadImgKey(_img, "img", node);
+	loadNum(_start, "start", node);
+	loadNum(_finish, "finish", node);
+	loadColor(_col, node);
+
+	if (nodeValid("text", node, false))
+		_text.load(node->first_node("text"));
+
+	reset();
+}
+
+void AnimationFrame::reset() {
+	switch (_eff._type) {
+	case FADE_IN:
+		_col.a = 0;
+		break;
+	case FADE_OUT:
+		_col.a = 255;
+		break;
+	default:
+		_col.a = 255;
+		break;
+	}
+}
+
+void AnimationFrame::draw(const uint32 &timestamp) {
+	warning("STUB: AnimationFrame::draw()");
+
+#if 0
+	// Only draw the frame in the specified duration
+	if (timestamp >= start && timestamp <= finish) {
+		// Fill the screen with the color indicated
+		SDL_SetRenderDrawBlendMode(gRenderer, SDL_BLENDMODE_BLEND);
+		SDL_SetRenderDrawColor(gRenderer, col.r, col.g, col.b, col.a);
+		SDL_RenderFillRect(gRenderer, NULL);
+
+		g_engine->_imageManager->draw(x, y, img);
+		text.draw();
+	}
+#endif
+}
+
+DrawType AnimationFrame::internalEvents(const uint32 &timestamp) {
+
+	// Vary alpha according to the effect values in the variation time frame
+	if (timestamp >= _eff._start && timestamp <= _eff._finish) {
+		// These equations courtesy of linear algebra
+		switch (_eff._type) {
+		case FADE_IN:
+			_col.a = (255 * (timestamp - _eff._start)) / (_eff._finish - _eff._start);
+			break;
+		case FADE_OUT:
+			_col.a = (255 * (_eff._finish - timestamp)) / (_eff._finish - _eff._start);
+			break;
+		default:
+			break;
+		}
+
+		return _eff._drawGame;
+	}
+
+	return DRAW_SAME;
+}
+
+} // End of namespace Crab