GUI & anti-aliasing

[pc0de]

I'd like to disable anti-aliasing during the rendering of GUI Elements.

When anti-aliasing is turned on at the device level it appears that it can't be controlled after the device is created.

Also, attempting to control it at the material level doesn't appear to work. COpenGLDriver::setRenderStates2DMode mod:

Code: Select all

--- source/Irrlicht/COpenGLDriver.cpp   (revision 2261)
+++ source/Irrlicht/COpenGLDriver.cpp   (working copy)
@@ -2238,6 +2238,7 @@
                        mat.ZBuffer=ECFN_NEVER;
                        mat.Lighting=false;
                        mat.TextureLayer[0].BilinearFilter=false;
+            mat.AntiAliasing = 0;
                        setBasicRenderStates(mat, mat, true);
                        LastMaterial = mat;
                        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

Is this even possible?

[hybrid]

Yes, that should work. I've just recently discussed about adding a "2D material override" to set things like filtering and which could also be used to change anti-aliasing and stuff.

[pc0de]

That didn't work (setting mat.AntiAliasing = 0; in setRenderStates2DMode). I tried testing it before researching what it would take to add a "2D material override".

Both images have the test patch "mat.AntiAliasing=0" compiled in. The top image has SIrrlichtCreationParameters.AntiAlias set to 0, the bottom is set to 8:

Same for the left/right captures here:

[hybrid]

Hmm, I'll check and also try to find some way to configure the anti-aliasing. Moving to bugs forum to track it, maybe you want to add a feature request to our official tracker: https://sourceforge.net/tracker2/?atid= ... unc=browse

[pc0de]

Added to the tracker: 2686141. Thanks.

[robmar]

Did anyone find a method to disable GUI anti-aliasing?

[hybrid]

Well, somehow this thread moved to the wrong forum. So now moving it on to bug forum. But the tracker is closed, so maybe it works now as expected. This would mean that you simply set antiAlias to zero in the 2doverride material

[robmar]

Just tried this, but it didn´t disable GUI anit-alias:-

m_video_driver->enableMaterial2D();
video::SMaterial& material2D = m_video_driver->getMaterial2D();
material2D.AntiAliasing = 0;

[REDDemon]

as workaround simply disable antialiasing. render GUI at full resolution, and render the scene to a texture with desired resolution. Then scale that texture to fit the screen and use a screen quad. You will have nice gui at full resolution, and performance of rendering the scene to a smaller resolution.

(are you working too to a gui plugin based ? XD your windows looks very nice )

[robmar]

ouch! my cpu will melt! thanks for the idea though!

[REDDemon]

well usually antialiasing like your case is done on CPU, while using render to texture should force that do happens on videocard (should, maybe certain drivers already do AA on video card)

[robmar]

Its a sure thing, all recent video cards do AA on the gpu otherwise it would just all slow down to a stop!!