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Diffstat (limited to 'src/system/Qt3DSEGLTimer.h')
| -rw-r--r-- | src/system/Qt3DSEGLTimer.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/system/Qt3DSEGLTimer.h b/src/system/Qt3DSEGLTimer.h new file mode 100644 index 0000000..4c9f4ce --- /dev/null +++ b/src/system/Qt3DSEGLTimer.h @@ -0,0 +1,70 @@ +/**************************************************************************** +** +** Copyright (C) 1993-2009 NVIDIA Corporation. +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of Qt 3D Studio. +** +** $QT_BEGIN_LICENSE:GPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 or (at your option) any later version +** approved by the KDE Free Qt Foundation. The licenses are as published by +** the Free Software Foundation and appearing in the file LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#pragma once +#include "Qt3DSTimer.h" +#include "Qt3DSTypes.h" + +// You have to include egl before including this file. + +typedef EGLuint64NV(EGLAPIENTRYP PFNEGLGETSYSTEMTIMEFREQUENCYNVPROC)(void); +typedef EGLuint64NV(EGLAPIENTRYP PFNEGLGETSYSTEMTIMENVPROC)(void); +extern EGLuint64NV eglSystemTimeFrequency; +extern PFNEGLGETSYSTEMTIMEFREQUENCYNVPROC eglGetSystemTimeFrequencyNVProc; +extern PFNEGLGETSYSTEMTIMENVPROC eglGetSystemTimeNVProc; + +namespace Q3DStudio { + +struct SEGLTimeProvider : public Q3DStudio::ITimeProvider +{ +public: + Q3DStudio::INT64 m_TimeFrequency; + SEGLTimeProvider() + : m_TimeFrequency(0) + { + } + virtual Q3DStudio::INT64 GetCurrentTimeMicroSeconds() + { + // This can be called before EGL is initialized. + if (eglGetSystemTimeFrequencyNVProc == NULL || eglGetSystemTimeNVProc == NULL) + return 0; + + if (!m_TimeFrequency) { + // Time frequency converts to seconds. + m_TimeFrequency = eglGetSystemTimeFrequencyNVProc(); + // We need it to conver to microseconds + m_TimeFrequency = m_TimeFrequency / 1000000ULL; + } + Q3DStudio::INT64 currentTime = eglGetSystemTimeNVProc(); + currentTime = currentTime / m_TimeFrequency; + return currentTime; + } +}; +}
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