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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:FDL$
** 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 Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\title Building the \RUNTIME
\page building-opengl-runtime.html
\section1 Build Settings
To configure runtime features you can modify \c ogl-runtime\commonplatform.pri file.
This file contains defines which turn on / off specific features.
\section2 Performance Logging
Enable \c QT3DS_ENABLE_PERF_LOGGING to build runtime with performance logging on. At runtime, to see the logs
you should also enable \c qt3ds.perf_info category e.g. with \c "QT_LOGGING_RULES=qt3ds.perf_info=true".
More information about Qt logging categories from \l {https://doc.qt.io/qt-5/qloggingcategory.html}
During the application startup console output should then contain following:
\badcode
qt3ds.perf_info: 1. (1) Application: Begin Load - 1.145900ms = 1.146200ms
qt3ds.perf_info: 2. (1) Context: CreateRenderContext - 192.358500ms = 193.522300ms
qt3ds.perf_info: 3. (1) Binding: Initial Batch Image Load - 0.003200ms = 193.551800ms
qt3ds.perf_info: 4. (1) Binding: Initialize Scenes - 0.000100ms = 193.563500ms
qt3ds.perf_info: 5. (1) SceneManager: OnGraphicsInitialized - 0.023800ms = 193.567600ms
qt3ds.perf_info: 6. (1) Application: EndLoad - 0.000500ms = 193.574900ms
qt3ds.perf_info: 7. (1) Application: GetMetaData - 59.171400ms = 252.875800ms
qt3ds.perf_info: 8. (3) BatchLoader: Image Decompression - 15.395400ms = 294.876900ms
...
qt3ds.perf_info: 37. (1) RuntimeView: Stopping startup timer - 0.000500ms = 477.483800ms
qt3ds.perf_info: RuntimeView: First frame at - 1601ms
qt3ds.perf_info: Render Statistics: 33.62fps, frame count 34
qt3ds.perf_info: Render Statistics: 59.92fps, frame count 60
qt3ds.perf_info: Render Statistics: 59.92fps, frame count 60
...
\endcode
Log format is: \c {(n) [task name] - [time] = [cumulative time]} where:
\list
\li \c (n) = The amount of time \c [task name] was run during startup.
\li \c [task name] = Method/task being logged.
\li \c [time] = How many ms running \c [task name] for \c (n) times totally takes.
\li \c [cumulative time] = How many total ms has passed when the last run of \c [task name] ends.
\endlist
\note When analyzing the results, please note that tasks overlap with each other, some tasks include other tasks etc.
Also, cumulative time only contains time spent inside runtime methods where \c {"First frame at"} contains the whole startup time.
\note \c QT3DS_ENABLE_PERF_LOGGING should not be enabled in release builds as logging increases performance overhead.
\section1 Build Instructions
\list
\li
\l {Building \RUNTIME for Embedded Linux}
\li
\l {Building \RUNTIME for GHS Integrity}
\li
\l {Building \RUNTIME for QNX}
\endlist
*/
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