1 | // SuperTux |
2 | // Copyright (C) 2006 Matthias Braun <matze@braunis.de> |
3 | // |
4 | // This program is free software: you can redistribute it and/or modify |
5 | // it under the terms of the GNU General Public License as published by |
6 | // the Free Software Foundation, either version 3 of the License, or |
7 | // (at your option) any later version. |
8 | // |
9 | // This program is distributed in the hope that it will be useful, |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | // GNU General Public License for more details. |
13 | // |
14 | // You should have received a copy of the GNU General Public License |
15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
16 | |
17 | #ifndef HEADER_SUPERTUX_SUPERTUX_SCREEN_FADE_HPP |
18 | #define |
19 | |
20 | class DrawingContext; |
21 | |
22 | /** |
23 | * Screen to be displayed simultaneously with another Screen. |
24 | * |
25 | * This is used for Screen transition effects like a fade-out or a shrink-fade |
26 | */ |
27 | class ScreenFade |
28 | { |
29 | public: |
30 | virtual ~ScreenFade() {} |
31 | |
32 | /** returns true if the effect is completed */ |
33 | virtual bool done() const = 0; |
34 | |
35 | /** gets called once per frame. The ScreenFade should draw itself in |
36 | this function. State changes should not be done in this |
37 | function, but rather in update */ |
38 | virtual void draw(DrawingContext& context) = 0; |
39 | |
40 | /** gets called for once (per logical) frame. ScreenFades should do |
41 | their state updates and logic here */ |
42 | virtual void update(float dt_sec) = 0; |
43 | }; |
44 | |
45 | #endif |
46 | |
47 | /* EOF */ |
48 | |