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/*
Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
Copyright (C) 2012, 2013 Company 100, Inc.
Copyright (C) 2012, 2013 basysKom GmbH
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "TextureMapperFPSCounter.h"
#include "TextureMapper.h"
#include <wtf/CurrentTime.h>
namespace WebCore {
TextureMapperFPSCounter::TextureMapperFPSCounter()
: m_isShowingFPS(false)
, m_fpsInterval(0)
, m_fpsTimestamp(0)
, m_lastFPS(0)
, m_frameCount(0)
{
String showFPSEnvironment = getenv("WEBKIT_SHOW_FPS");
bool ok = false;
m_fpsInterval = showFPSEnvironment.toDouble(&ok);
if (ok && m_fpsInterval) {
m_isShowingFPS = true;
m_fpsTimestamp = monotonicallyIncreasingTime();
}
}
void TextureMapperFPSCounter::updateFPSAndDisplay(TextureMapper& textureMapper, const FloatPoint& location, const TransformationMatrix& matrix)
{
if (!m_isShowingFPS)
return;
m_frameCount++;
double delta = monotonicallyIncreasingTime() - m_fpsTimestamp;
if (delta >= m_fpsInterval) {
m_lastFPS = int(m_frameCount / delta);
m_frameCount = 0;
m_fpsTimestamp += delta;
}
textureMapper.drawNumber(m_lastFPS, Color::black, location, matrix);
}
} // namespace WebCore
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