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- // SuperTux
- // Copyright (C) 2006 Matthias Braun <matze@braunis.de>
- //
- // 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 "supertux/fadetoblack.hpp"
- #include "supertux/globals.hpp"
- #include "video/drawing_context.hpp"
- FadeToBlack::FadeToBlack(Direction direction, float fade_time, Color color) :
- m_direction(direction),
- m_fade_time(fade_time),
- m_color(color),
- m_accum_time(0)
- {
- }
- void
- FadeToBlack::update(float dt_sec)
- {
- m_accum_time += dt_sec;
- if (m_accum_time > m_fade_time)
- m_accum_time = m_fade_time;
- }
- void
- FadeToBlack::draw(DrawingContext& context)
- {
- Color col = m_color;
- col.alpha = m_accum_time / m_fade_time;
- if (m_direction != FADEOUT)
- col.alpha = 1.0f - col.alpha;
- // The colours are mixed directly in sRGB space, so change alpha for a more
- // linear fading (it may only work correctly with black).
- col.alpha = Color::remove_gamma(col.alpha);
- context.color().draw_filled_rect(context.get_rect(), col, LAYER_GUI + 1);
- }
- bool
- FadeToBlack::done() const
- {
- return m_accum_time >= m_fade_time;
- }
- /* EOF */
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