On 10/05/2012 02:28 PM, Wehmer, Matthias wrote: > Hi Samuel, > > I will try to make myself clearer, sorry for that unclear information. > > The shaders I’m talking about are those, that I implemented in my custom > Qml plugin via the QSGSimpleMaterial class. There I have implemented two > custom versions of the vertex and the fragment shader, whereby the later > is just coloring the scene. OpenGL itself is involved in such a way as I > use it to pass a texture to the fragment shader, but the geometry for > example is created with the methods and objects given by Qt, i.e. I use > a QSGGeometryNode and attach my geometry to it and simply draw a > Line_Strip between them. > > The setAntialiasing() method I talk about is the one from the QQuickItem > class.
Yep, this was implemented recently and is a way to get antialiasing without using multisample buffers (since those consume a lot of memory). It does antialiasing in the fragment shader, by adding a set of triangles around the shape (in the case of a Rectangle), and doing a fade-out of the material around the edges. I believe it needs to be implemented by each item / node somehow. > From my understanding this method should turn on some kind of > postprocessing, that is antialise the scene after it is drawn by the > SceneGraph. Obviously this doesn’t work for my custom widget, although > all other items are antialiased. So either I understand this option and > its consequences wrong or I need to implement some postprocessing on my > own. For that I would need access to the scene (in form of a texture) > after it has been drawn by the SceneGraph. Is there a possibility for > that? Do you see my problem and what I understand wrong? I’m kinda > struggling right now, because the whole rendering mechanism seems to be > a black box for me. :D It is not a postprocessing feature. I'd suggest to have a look at how the Rectangle element implements the antialiasing. Of course, you can also use multisampling by doing setSamples(4) or similar on the QQuickView's surface format. -- Samuel _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
