nux-1.16.0
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00001 /* 00002 * Copyright 2010 Inalogic® Inc. 00003 * 00004 * This program is free software: you can redistribute it and/or modify it 00005 * under the terms of the GNU Lesser General Public License, as 00006 * published by the Free Software Foundation; either version 2.1 or 3.0 00007 * of the License. 00008 * 00009 * This program is distributed in the hope that it will be useful, but 00010 * WITHOUT ANY WARRANTY; without even the implied warranties of 00011 * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR 00012 * PURPOSE. See the applicable version of the GNU Lesser General Public 00013 * License for more details. 00014 * 00015 * You should have received a copy of both the GNU Lesser General Public 00016 * License along with this program. If not, see <http://www.gnu.org/licenses/> 00017 * 00018 * Authored by: Jay Taoko <jaytaoko@inalogic.com> 00019 * 00020 */ 00021 00022 00023 #include "NuxCore/NuxCore.h" 00024 #include "GLResource.h" 00025 #include "GLTimer.h" 00026 00027 namespace nux 00028 { 00029 GLTimer::GLTimer() 00030 { 00031 #if defined(NUX_OS_WINDOWS) 00032 LARGE_INTEGER freq; 00033 QueryPerformanceFrequency (&freq); 00034 QueryPerformanceCounter (&now); 00035 res = (float) (1.0f / (double) freq.QuadPart); 00036 #elif defined(NUX_OS_LINUX) 00037 gettimeofday (&m_last_time, NULL); 00038 #endif 00039 } 00040 00041 GLTimer::~GLTimer() 00042 { 00043 } 00044 00045 void GLTimer::Reset (void) 00046 { 00047 #if defined(NUX_OS_WINDOWS) 00048 QueryPerformanceCounter (&now); 00049 #elif defined(NUX_OS_LINUX) 00050 gettimeofday (&m_last_time, NULL); 00051 #endif 00052 } 00053 00054 float GLTimer::PassedMilliseconds (void) 00055 { 00056 #if defined(NUX_OS_WINDOWS) 00057 LARGE_INTEGER temp; 00058 QueryPerformanceCounter (&temp); 00059 double elapsedTime = (temp.QuadPart - now.QuadPart) * res * 1000.0f; 00060 //now.QuadPart = temp.QuadPart; 00061 return elapsedTime; 00062 00063 #elif defined(NUX_OS_LINUX) 00064 timeval current_time; 00065 float elapsedTime; 00066 00067 gettimeofday (¤t_time, NULL); 00068 00069 elapsedTime = (current_time.tv_sec - m_last_time.tv_sec) * 1000.0f; // seconds to millisecond 00070 elapsedTime += (current_time.tv_usec - m_last_time.tv_usec) / 1000.0f; // micro seconds to millisecond 00071 return elapsedTime; 00072 #endif 00073 } 00074 00075 // float GLTimer::PassedFrac(void) 00076 // { 00077 // LARGE_INTEGER temp; 00078 // QueryPerformanceCounter(&temp); 00079 // return (temp.QuadPart - now.QuadPart) * res; 00080 // } 00081 }