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Qt User Guide

Introduction​

Qt is a cross-platform C++ framework (C++ library) primarily used for developing graphical user interface (GUI) programs. It can also be used to develop command-line interface (CUI) programs without a GUI. OpenGL ES (OpenGL for Embedded Systems) is a cross-platform 2D/3D graphics API designed for rendering efficient 2D and 3D graphics on low-power devices. It is a subset of OpenGL (Open Graphics Library) tailored for embedded systems.
This guide provides instructions for adapting Qt5 with OpenGL ES hardware acceleration on the SpacemiT SoC platform.

Install Qt5 development environment​

Install C/C++ compilation environment​

$ sudo apt-get update
$ sudo apt-get install build-essential

Install Qt5 development tool​

$ sudo apt-get install qtbase5-gles-dev qtchooser qt5-qmake qtbase5-dev-tools

Check the installed Qt version.

$ qmake -v
QMake version 3.1
Using Qt version 5.15.13 in /usr/lib/riscv64-linux-gnu

Install Qt5 wayland plugin​

$ sudo apt-get install qtwayland5

Configure the Qt5 backend display service​

$ export QT_QPA_PLATFORM=wayland

Building and running Qt5 program​

Download base-opensource-src-gles​

$ apt-get source qtbase-opensource-src-gles
$  tree qtbase-opensource-src-gles-5.15.13+dfsg -L 1
qtbase-opensource-src-gles-5.15.13+dfsg
├── bin
├── config_help.txt
├── config.tests
├── configure
├── configure.bat
├── configure.json
├── configure.pri
├── debian
├── dist
├── doc
├── examples
├── include
├── INSTALL
├── lib
├── LICENSE.FDL
├── LICENSE.GPL2
├── LICENSE.GPL3
├── LICENSE.GPL3-EXCEPT
├── LICENSE.LGPL3
├── LICENSE.LGPLv3
├── LICENSE.QT-LICENSE-AGREEMENT
├── mkspecs
├── qmake
├── qtbase.pro
├── src
├── sync.profile
├── tests
└── util

Build qtbase-opensource-src-gles​

Install dependencies​

$ sudo apt-get build-dep qtbase-opensource-src-gles

Compile​

$ dpkg-buildpackage -us -uc -nc -b -j4

Build the example projects​

Generate Makefile using qmake​

$ cd qtbase-opensource-src-gles-5.15.13+dfsg/examples/widgets/animation/animatedtiles
$ qmake

Generate executable files using make​

$ make

Run the examples​

$ ./animatedtiles

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