1/* 2 Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies) 3 Copyright (C) 2012, 2013 Company 100, Inc. 4 Copyright (C) 2012, 2013 basysKom GmbH 5 6 This library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Library General Public 8 License as published by the Free Software Foundation; either 9 version 2 of the License, or (at your option) any later version. 10 11 This library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Library General Public License for more details. 15 16 You should have received a copy of the GNU Library General Public License 17 along with this library; see the file COPYING.LIB. If not, write to 18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 Boston, MA 02110-1301, USA. 20*/ 21 22#include "config.h" 23 24#if USE(ACCELERATED_COMPOSITING) && USE(TEXTURE_MAPPER) 25 26#include "TextureMapperFPSCounter.h" 27 28#include "TextureMapper.h" 29#include <wtf/CurrentTime.h> 30 31namespace WebCore { 32 33TextureMapperFPSCounter::TextureMapperFPSCounter() 34 : m_isShowingFPS(false) 35 , m_fpsInterval(0) 36 , m_fpsTimestamp(0) 37 , m_lastFPS(0) 38 , m_frameCount(0) 39{ 40 String showFPSEnvironment = getenv("WEBKIT_SHOW_FPS"); 41 bool ok = false; 42 m_fpsInterval = showFPSEnvironment.toDouble(&ok); 43 if (ok && m_fpsInterval) { 44 m_isShowingFPS = true; 45 m_fpsTimestamp = WTF::currentTime(); 46 } 47} 48 49void TextureMapperFPSCounter::updateFPSAndDisplay(TextureMapper* textureMapper, const FloatPoint& location, const TransformationMatrix& matrix) 50{ 51 if (!m_isShowingFPS) 52 return; 53 54 m_frameCount++; 55 double delta = WTF::currentTime() - m_fpsTimestamp; 56 if (delta >= m_fpsInterval) { 57 m_lastFPS = int(m_frameCount / delta); 58 m_frameCount = 0; 59 m_fpsTimestamp += delta; 60 } 61 62 textureMapper->drawNumber(m_lastFPS, Color::black, location, matrix); 63} 64 65} // namespace WebCore 66 67#endif // USE(ACCELERATED_COMPOSITING) 68