Can not set renderable type from OpenGLES to OpenGL in Qt 5.7.0

pvt.peter

Hi,

I have worked on a project which used Qt 5.4.1 with OpenGL, here is the installer which i installed earlier:
qt-opensource-windows-x86-msvc2013_opengl-5.4.1.exe

After, we have done an upgrade from Qt 5.4.1 to Qt 5.7.0, so i installed this package:
qt-opensource-windows-x86-msvc2013-5.7.0.exe

On this project, we use OpenGL shared context too, which is works perfectly under Qt 5.4.1.
After upgade to Qt 5.7.0, we got unexpected errors.

The main problem is: i can not set individual QSurfaceFormat for QOpenGLContext. I would like to use OpenGL as RenderableType.
So, i create a QSurfaceFormat, and passed to to QOpenGLContext::setFormat().

QSurfaceFormat format;
format.setVersion(2, 0); // OpenGL 2.0
format.setProfile(QSurfaceFormat::CoreProfile);
format.setRenderableType(QSurfaceFormat::RenderableType::OpenGL);

QOpenGLContext *shareContext = QOpenGLContext::globalShareContext();

shareContext->isOpenGLES(); // true
shareContext->format().version(); // QPair(2,0) -> OpenGL 2.0
shareContext->format().renderableType(); // 2 -> QSurfaceFormat::RenderableType::OpenGLES

shareContext->setFormat(glFormat);
shareContext->create();

shareContext->isOpenGLES(); // true
shareContext->format().version(); // QPair(2,0) -> OpenGL 2.0
shareContext->format().renderableType(); // 2 -> QSurfaceFormat::RenderableType::OpenGLES

What is the problem?
It is like, there is a global setting to RenderableType as OpenGLES.
How can i set to OpenGL?

Thanks in advance,
Peter

SGaist

Hi,

Since 5.5 the backend selection is dynamic. You can however influence its behavior. See here for more information.

pvt.peter

Hi @SGaist, thanks for your reply.

I think i found the solution. Qt::AA_UseDesktopOpenGL and Qt::AA_ShareOpenGLContexts attributes solved my problem.

SGaist

Good !

Then please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)