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50
51#include <QGuiApplication>
52#include <QSurfaceFormat>
53#include <QOpenGLContext>
54
55#include "glwindow.h"
56
57// This example demonstrates easy, cross-platform usage of OpenGL ES 3.0 functions via
58// QOpenGLExtraFunctions in an application that works identically on desktop platforms
59// with OpenGL 3.3 and mobile/embedded devices with OpenGL ES 3.0.
60
61// The code is always the same, with the exception of two places: (1) the OpenGL context
62// creation has to have a sufficiently high version number for the features that are in
63// use, and (2) the shader code's version directive is different.
64
65int main(int argc, char *argv[])
66{
67 QGuiApplication app(argc, argv);
68
69 QSurfaceFormat fmt;
70 fmt.setDepthBufferSize(24);
71
72 // Request OpenGL 3.3 core or OpenGL ES 3.0.
73 if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) {
74 qDebug(msg: "Requesting 3.3 core context");
75 fmt.setVersion(major: 3, minor: 3);
76 fmt.setProfile(QSurfaceFormat::CoreProfile);
77 } else {
78 qDebug(msg: "Requesting 3.0 context");
79 fmt.setVersion(major: 3, minor: 0);
80 }
81
82 QSurfaceFormat::setDefaultFormat(fmt);
83
84 GLWindow glWindow;
85 glWindow.showMaximized();
86
87 return app.exec();
88}
89

source code of qtbase/examples/opengl/hellogles3/main.cpp