glCtrl.WhenGLPaint<<[&]{
			Size sz=GetSize();
			GLDraw w;w.Init(sz);
			w.DrawRect(sz,Blue());  //when p->a=10 it is obvious what is not correct
			//w.DrawRect(sz,White());  //only on whiteBg it works correctly with any alpha value
			//w.DrawRect(sz,Black());  //same as on eg. BlueBg
			Image img2=StreamRaster::LoadFileAny("img2.png");
			ImageBuffer ib(img2);
			for(RGBA*p=~ib,*e=ib.End();p<e;p++)p->a=2;
			img2=ib;
			w.DrawImage(0,0,img2);
			//w.DrawImage(0,0,StreamRaster::LoadFileAny("img2.png"));
			//w.DrawImage(0,0,StreamRaster::LoadFileAny("img1.png"));
    };