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99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
/*
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Neutrino-HD GUI, COSDFader implementation
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Copyright (C) 2011 Stefan Seyfried
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <global.h>
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#include <driver/rcinput.h>
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#include <driver/fade.h>
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COSDFader::COSDFader(int trans)
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{
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fb = CFrameBuffer::getInstance();
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target_trans = trans;
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timer = 0;
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step = 0;
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}
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COSDFader::~COSDFader()
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{
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Stop();
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}
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void COSDFader::StartFadeIn()
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{
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transparency = 100;
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step = -FADE_STEP;
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Fade();
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}
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/* returns true if fade out was not started before and fade is enabled */
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bool COSDFader::StartFadeOut()
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{
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if (!g_settings.widget_fade) /* disabled */
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return false;
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if (step == FADE_STEP) /* already fading out... */
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return false;
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/* start fading */
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step = FADE_STEP;
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Fade();
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return true;
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}
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void COSDFader::Stop()
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{
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if (!step)
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return;
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g_RCInput->killTimer(timer);
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fb->setBlendMode(1); /* per pixel alpha */
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}
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/* returns true if fade out is finished */
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bool COSDFader::Fade()
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{
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if (!g_settings.widget_fade)
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return false;
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if (timer == 0)
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timer = g_RCInput->addTimer(FADE_TIME, false);
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if (transparency == 100 || transparency == target_trans)
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{
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fb->setBlendMode(2); /* 2 == "global alpha x pixel alpha" */
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fb->setBlendLevel(transparency);
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transparency += step;
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return false;
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}
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transparency += step;
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if (step > 0 && transparency >= 100) /* finished fading out */
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{
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transparency = target_trans;
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g_RCInput->killTimer(timer);
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return true;
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}
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if (step < 0 && transparency <= target_trans) /* finished fading in */
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{
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transparency = target_trans;
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g_RCInput->killTimer(timer);
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fb->setBlendMode(1); /* 1 == "per pixel alpha" */
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return false;
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}
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fb->setBlendLevel(transparency);
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return false;
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}
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