[Interest] Force Qt 5.4 to use ANGLE OpenGL ES 2 implementation

[Sean Harmer]

On Sunday 15 February 2015 11:55:56 Roberto Garrido Martín wrote:
> Hi,
> 
> On 15 February 2015 at 10:08, Andrew Knight <qt at panimo.net> wrote:
> > FTA, use the QT_OPENGL environment variable (set QT_OPENGL=angle) or the
> > application attribute
> > (QCoreApplication::setAttribute(Qt::AA_UseOpenGLES)).
> > From your results below, it doesn't appear you've tried either.
> 
> Setting QCoreApplication::setAttribute(Qt::AA_UseOpenGLES) actually worked,
> thanks!
> Here the debug message:
> 
> qt.qpa.gl: Qt: Using EGL from libEGLd.dll
> qt.qpa.gl: Qt: Using OpenGL ES 2.0 from libGLESv2d.dll
> qt.qpa.gl: QWindowsEGLStaticContext::create Created EGL display 0x4dc49c8 v
> 1 . 4
> qt.qpa.gl: QWindowsIntegration::createPlatformOpenGLContext
> QSurfaceFormat(version 2.0, options QFlags(), depthBufferSize 24,
> redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize
> -1, stencilBufferSize 8, samples -1, swapBehavior 2, swapInterval 1,
> profile  0)
> 
> 
> Now I'm having another error. We are using Glew-1.12.0 in order to load the
> non-Core OpenGL 1.1 functions on windows. In order to initialize
> Glew-1.12.0, glewInit() must be called first. it returns GLEW_OK when the
> initialization was successfull. It does work with Desktop OpenGL , but with
> GLES it returns "Missing GL Version".

Pick OpenGL ES or desktop OpenGL, not both. If you need to use the 3rd party 
renderer that uses ES 2, you will need to restrict yourself to OpenGL ES 2 
too.

Cheers,

Sean

--
Dr Sean Harmer | sean.harmer at kdab.com | Managing Director UK
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