[Interest] QGLWidget and OGL version 4.3 functions?

[Thomas Meyer]

Hi,

Am 30.09.2013 12:51, schrieb Sean Harmer:
> Hi,
>
> On Sunday 29 September 2013 16:12:48 Thomas Meyer wrote:
>> thank you very much!
> You're welcome.
>
>> (I have read your 5 parts article:
>> http://www.kdab.com/opengl-in-qt-5-1-part-1/
>> and tried the terrain_tessellation project
>> http://www.kdab.com/~sean/terrain_tessellation.zip [awesome])
>>
>> I want to use the QGLWidget, because I get 'artefacts' if
>> I use QPainter's drawText in QWindow and it is possible to
>> add QGLWidget as central widget in QMainWindow.
>> With the QWindow I can only render something (I think) and
>> found no solution to add it to something or to use buttons, sliders etc.
>>
>> Before I got your answer, I found a solution:
>> http://qt-project.org/wiki/How_to_use_OpenGL_Core_Profile_with_Qt
>> https://svn.theharmers.co.uk/svn/codes/public/opengl/trunk/07-core-profile/
>> and
>> http://qt-project.org/forums/viewthread/16041/#90717
>>
>> So, if I want to use the 'glTextureView' (Core since version 4.3,
>> http://www.opengl.org/wiki/GLAPI/glTextureView) in GLWidget:
>> ...
>> voidGLWidget::initializeGL(void)
>>
>> {
>>
>> ...
>> typedefvoid(APIENTRY*_glTextureView)(GLuint,GLenum,GLuint,GLenum,GLuint,GLui
>> nt,GLuint,GLuint);
>>
>>
>> _glTextureViewglTextureView;
>>
>> glTextureView=(_glTextureView)context()->getProcAddress("glTextureView");
>>
>> if(glTextureView!=NULL)
>> {
>> qDebug()<<Q_FUNC_INFO<<"glTextureView!=NULL";
>> }
>> ...
>> I have not used the function, but this code works for me.
> In all seriousness, unless you actually enjoy resolving function pointers I
> would just use QOpenGLFunctions_4_3_Core. It will make your life much easier.
That's true! I have replaced the typedef's to bind a VAO with:
...
uintvao;

funcs->glGenVertexArrays(1,&vao);
funcs->glBindVertexArray(vao);
...


Thanks again,
  Thomas
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