String exportdir;
	
	virtual void ExportViewAsImage(){
		Size sz=GetSize();
		ImageBuffer ib(sz);

		glReadPixels(0,0,sz.cx,sz.cy,GL_BGRA_EXT,GL_UNSIGNED_BYTE,(GLvoid*)~ib);
		if(!glGetError()){
			// Flip
			Buffer<RGBA> temp(sz.cx);
			for(int i=0;i<sz.cy/2;i++){
				memcpy(temp,ib[i],sz.cx*sizeof(RGBA));
				memcpy(ib[i],ib[sz.cy-1-i],sz.cx*sizeof(RGBA));
				memcpy(ib[sz.cy-1-i],temp,sz.cx*sizeof(RGBA));
			}
			
			// Flatten alpha channel
			for(int i=0;i<sz.cy;i++){
				for(int x=0;x<sz.cx;x++) ib[i][x].a=255;
			}
	
			// Save image
			FileSel fs;
			fs.Type("Portable Network Graphics (*.png)","*.png");
			if(!exportdir.IsEmpty()) fs.PreSelect(exportdir);
			else fs.ActiveDir(::GetDesktopFolder());
			if(fs.ExecuteSaveAs("Save snapshot as...")){
				exportdir=~fs;
				PNGEncoder enc;
				enc.SaveFile(~fs,ib);
			}
		}
	}
	
	void ContextMenu(Bar& bar) {
		bar.Add("Export view as image...", [&](){ ExecuteGL(THISFN(ExportViewAsImage)); });
	}