[Interest] QGLWidget problem with Qt 5.5 and MSVC 2015 (Should QT_OPENGL_ES_2 be defined?)

[Agocs Laszlo]

There are no official MSVC2015 builds for Qt 5.5 so I assume you are building Qt yourself, in which case the most likely cause is having a misconfigured build targeting ANGLE only. Pass -opengl dynamic or -opengl desktop to configure.


Best regards,

Laszlo


________________________________
From: interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org <interest-bounces+laszlo.agocs=theqtcompany.com at qt-project.org> on behalf of Björn Piltz <bjornpiltz at gmail.com>
Sent: Monday, October 12, 2015 9:17 AM
To: interest at qt-project.org
Subject: Re: [Interest] QGLWidget problem with Qt 5.5 and MSVC 2015 (Should QT_OPENGL_ES_2 be defined?)

I just want to add that this problem isn't confined to QGLWidget, but the compiler detection for 2015 seems to be broke somewhere. The simple program https://github.com/TReed0803/QtOpenGL/tree/9990c8dd9ac5899289b28efaaaf5a1d1a97fab48/0_OpenGLWindow outputs
    OpenGL 3.3.0 NVIDIA 353.82 ( CoreProfile )
when compiled with MSVC2013 and
    OpenGL ES OpenGL ES 3.0 (ANGLE 2.1.99f075dade7c) ( CoreProfile )
when compiled with MSVC2015.

Cheers,
Björn

2015-10-07 15:52 GMT+02:00 Björn Piltz <bjornpiltz at gmail.com<mailto:bjornpiltz at gmail.com>>:
I'm trying to compile some legacy QGLWidget code with Qt 5.5 and MSVC 2015 and I am running into problems. The same code compiles with Qt 5.5 and MSVC 2013.

The problem is I get a "C3861: identifier not found" for basic gl functions like glMatrixMode. The reason seems to be that the 2015 build defines QT_OPENGL_ES_2 and gets its GL through the <qopengl.h> block:
   #   include <GLES2/gl2.h>

whereas 2013 gets its through the block

    #  define GL_GLEXT_LEGACY // Prevents GL/gl.h from #including system glext.h
    #  include <GL/gl.h>
    #  include <QtGui/qopenglext.h>

I can make it compile by directly adding '#include <GL/gl.h>' to my code but then the widgets remain black and I suspect QT_OPENGL_ES_2  should not have been defined, right?

Cheers,
Björn

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20151012/fb08580f/attachment.html>