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50
51#include <QGuiApplication>
52#include <QSurfaceFormat>
53#include <QOffscreenSurface>
54#include <QOpenGLContext>
55#include <QDebug>
56#include <QPair>
57#include "glwindow.h"
58
59bool OGLSupports(int major, int minor, bool gles = false, QSurfaceFormat::OpenGLContextProfile profile = QSurfaceFormat::NoProfile)
60{
61 QOpenGLContext ctx;
62 QSurfaceFormat fmt;
63 fmt.setVersion(major, minor);
64 if (gles) {
65 fmt.setRenderableType(QSurfaceFormat::OpenGLES);
66 } else {
67 fmt.setRenderableType(QSurfaceFormat::OpenGL);
68 fmt.setProfile(profile);
69 }
70
71 ctx.setFormat(fmt);
72 ctx.create();
73 if (!ctx.isValid())
74 return false;
75 int ctxMajor = ctx.format().majorVersion();
76 int ctxMinor = ctx.format().minorVersion();
77 bool isGles = (ctx.format().renderableType() == QSurfaceFormat::OpenGLES);
78
79 if (isGles != gles) return false;
80 if (ctxMajor < major) return false;
81 if (ctxMajor == major && ctxMinor < minor)
82 return false;
83 if (!gles && ctx.format().profile() != profile)
84 return false;
85 return true;
86}
87
88int main(int argc, char *argv[])
89{
90 QGuiApplication app(argc, argv);
91
92 qDebug() << "Support for GL 2.0 noprof "<<( OGLSupports(major: 2,minor: 0,gles: false) ? "yes" : "no");
93 qDebug() << "Support for GL 2.0 core "<<( OGLSupports(major: 2,minor: 0,gles: false, profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
94 qDebug() << "Support for GL 2.0 compat "<<( OGLSupports(major: 2,minor: 0,gles: false, profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
95 qDebug() << "Support for GL 2.1 noprof "<<( OGLSupports(major: 2,minor: 1,gles: false) ? "yes" : "no");
96 qDebug() << "Support for GL 2.1 core "<<( OGLSupports(major: 2,minor: 1,gles: false, profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
97 qDebug() << "Support for GL 2.1 compat "<<( OGLSupports(major: 2,minor: 1,gles: false, profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
98 qDebug() << "Support for GL 3.0 noprof "<<( OGLSupports(major: 3,minor: 0,gles: false) ? "yes" : "no");
99 qDebug() << "Support for GL 3.0 core "<<( OGLSupports(major: 3,minor: 0,gles: false, profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
100 qDebug() << "Support for GL 3.0 compat "<<( OGLSupports(major: 3,minor: 0,gles: false, profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
101 qDebug() << "Support for GL 3.1 noprof "<<( OGLSupports(major: 3,minor: 1,gles: false) ? "yes" : "no");
102 qDebug() << "Support for GL 3.1 core "<<( OGLSupports(major: 3,minor: 1,gles: false, profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
103 qDebug() << "Support for GL 3.1 compat "<<( OGLSupports(major: 3,minor: 1,gles: false, profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
104 qDebug() << "Support for GL 3.2 core "<<( OGLSupports(major: 3,minor: 2,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
105 qDebug() << "Support for GL 3.2 compat "<<( OGLSupports(major: 3,minor: 2,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
106 qDebug() << "Support for GL 3.3 core "<<( OGLSupports(major: 3,minor: 3,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
107 qDebug() << "Support for GL 3.3 compat "<<( OGLSupports(major: 3,minor: 3,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
108 qDebug() << "Support for GL 4.0 core "<<( OGLSupports(major: 4,minor: 0,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
109 qDebug() << "Support for GL 4.0 compat "<<( OGLSupports(major: 4,minor: 0,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
110 qDebug() << "Support for GL 4.1 core "<<( OGLSupports(major: 4,minor: 1,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
111 qDebug() << "Support for GL 4.1 compat "<<( OGLSupports(major: 4,minor: 1,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
112 qDebug() << "Support for GL 4.2 core "<<( OGLSupports(major: 4,minor: 2,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
113 qDebug() << "Support for GL 4.2 compat "<<( OGLSupports(major: 4,minor: 2,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
114 qDebug() << "Support for GL 4.3 core "<<( OGLSupports(major: 4,minor: 3,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
115 qDebug() << "Support for GL 4.3 compat "<<( OGLSupports(major: 4,minor: 3,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
116 qDebug() << "Support for GL 4.4 core "<<( OGLSupports(major: 4,minor: 4,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
117 qDebug() << "Support for GL 4.4 compat "<<( OGLSupports(major: 4,minor: 4,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
118 qDebug() << "Support for GL 4.5 core "<<( OGLSupports(major: 4,minor: 5,gles: false,profile: QSurfaceFormat::CoreProfile) ? "yes" : "no");
119 qDebug() << "Support for GL 4.5 compat "<<( OGLSupports(major: 4,minor: 5,gles: false,profile: QSurfaceFormat::CompatibilityProfile) ? "yes" : "no");
120 qDebug() << "Support for GLES 2.0 "<<( OGLSupports(major: 2,minor: 0,gles: true) ? "yes" : "no");
121 qDebug() << "Support for GLES 3.0 "<<( OGLSupports(major: 3,minor: 0,gles: true) ? "yes" : "no");
122 qDebug() << "Support for GLES 3.1 "<<( OGLSupports(major: 3,minor: 1,gles: true) ? "yes" : "no");
123 qDebug() << "Support for GLES 3.2 "<<( OGLSupports(major: 3,minor: 2,gles: true) ? "yes" : "no");
124
125 QSurfaceFormat fmt;
126 fmt.setDepthBufferSize(24);
127
128 // Request OpenGL ES 3.1 context, as this is a GLES example. If not available, go for OpenGL 4.3 core.
129 if (OGLSupports(major: 3,minor: 1,gles: true)) {
130 qDebug(msg: "Requesting 3.1 GLES context");
131 fmt.setVersion(major: 3, minor: 1);
132 fmt.setRenderableType(QSurfaceFormat::OpenGLES);
133 } else if (OGLSupports(major: 4,minor: 3,gles: false,profile: QSurfaceFormat::CoreProfile)) {
134 qDebug(msg: "Requesting 4.3 core context");
135 fmt.setVersion(major: 4, minor: 3);
136 fmt.setRenderableType(QSurfaceFormat::OpenGL);
137 fmt.setProfile(QSurfaceFormat::CoreProfile);
138 } else {
139 qWarning(msg: "Error: This system does not support OpenGL Compute Shaders! Exiting.");
140 return -1;
141 }
142 QSurfaceFormat::setDefaultFormat(fmt);
143
144 GLWindow glWindow;
145 glWindow.showMaximized();
146
147 return app.exec();
148}
149

source code of qtbase/examples/opengl/computegles31/main.cpp