OpenGL is a complex development topic, and the marriage of Qt, OpenGL, OpenGL ES, and their shading languages, and the apps over-riding both the Qt app and the Qt GL widget, has always been difficult. The last commits by Georg & merged in by Alex just make things worse, and need to be reverted. Georg, if you’re working towards something new for Qt 5.4, I applaud that, but, it should be kept in a separate branch until completed, and Alex, you should have merged it until it’d been conformed to work on all OS’es.
Let’s have a look at the current broken code. The following is from one of my Mac’s. Detected: OpenGL "2.1" Driver version string: "2.1 NVIDIA-10.0.43 310.41.05f01" GL vendor is "NVIDIA Corporation" GL renderer is "NVIDIA GeForce GT 650M OpenGL Engine" GL Shading Language version is "1.20" GLSL Version Number after parsing: 1.2 This is not enough: we need GLSL1.30 or later. You should update graphics drivers, graphics hardware, or use the MESA version. Else, please try to use an older version like 0.12.4, and try there with --safe-mode Config option main/ignore_opengl_warning found, continuing. Expect problems. There is so much wrong with this, but, put simply, the application requests OpenGL 2.1 with GLSL 1.2, then tells the user to upgrade their hardware as this level of support is not sufficient for the app. Wow. And if I actually update the code to request & use the highest-supported versions, then the app crashes with the shaders failing to compile. With the lnksidasical development we have, this may be an insurmountable issue. But I think we need a well though out, defined, described, approach to getting the OpenGL mess cleaned up. The issues should be enumerated, the recommended approach described & discussed, and then we can each see what we can do to help get it implemented.
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