ofImage::grabScreen not works for enableAntiAliasing = true

Hey guys,

ofImage::grabScreen not works when settings.enableAntiAliasing = true for window, it works when turn antialiasing off, I searched related topic on this site, but no luck. I’m using of_iOS_0.93 for iPhone 5S with iOS 9.3.2

Any suggestion? thanks!

grabScreen works for:

ofiOSWindowSettings settings;
settings.enableAntiAliasing = false; // enables anti-aliasing which smooths out graphics on the screen.
settings.numOfAntiAliasingSamples = 0; // number of samples used for anti-aliasing.
settings.glesVersion = OFXIOS_RENDERER_ES1; // type of renderer to use, ES1, ES2, etc.

but not works for (return black pixels)

ofiOSWindowSettings settings;
settings.enableAntiAliasing = true; // enables anti-aliasing which smooths out graphics on the screen.
settings.numOfAntiAliasingSamples = 4; // number of samples used for anti-aliasing.
settings.glesVersion = OFXIOS_RENDERER_ES1; // type of renderer to use, ES1, ES2, etc.

any hint? thanks.