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QML support for the Go language
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Requesting OpenGL 3.3 context on OSX #138

Open tobscher opened 9 years ago

tobscher commented 9 years ago

Hi,

I am running into issues requesting an OpenGL context > 2.1 OSX. Do you know if this is a QML limitation I should be aware of? According to this resource I should be able to run OpenGL 4.1.

This is the error I am getting:

panic while painting: OpenGL version 3.3 is not available

Thanks for your help.

Tobias

mpiannucci commented 9 years ago

I have the same problem using both this and QT (C++) on Yosemite. This is an OSX limitation apparently. OSX can only create Core profiles.

For example, If I request a 3.3 Compatability Profile Context I am returned with a 2.1 Core Context. But if I request a 3.3 Core Profile Context, it creates a 4.1 Core Context. This is just the way OSX is.

tobscher commented 9 years ago

Hi @mpiannucci,

thanks for your reply, that is good to know.

My problem is that I can't create contexts which are higher than 2.1 (not even core profiles).

I have however successfully tried to obtain a 3.3 core context using GLFW (via go-gl/glfw3. They set a forward compatibility flag on OSX to obtain the correct context. Is this somehow related? Can you perhaps only obtain a core profile if the forward compatibility flag is set? Source: http://www.glfw.org/docs/latest/compat.html#compat_osx

Is it possible to set this flag using go-qml?

Thanks for any help.

mpiannucci commented 9 years ago

I havent got it to work with go-qml yet. I have gotten it to wokr with C++ and QT 5.3. I believe it is a limitation of qml and Core profiles as seen here https://bugreports.qt.io/browse/QTBUG-38817

tobscher commented 9 years ago

Is your C++ example available on GitHub?