Update texture example to latest code.
Update texture example to latest code.

ghisvail/vispy,ghisvail/vispy,hronoses/vispy,michaelaye/vispy,inclement/vispy,drufat/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,michaelaye/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,hronoses/vispy,sh4wn/vispy,jdreaver/vispy,julienr/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,dchilds7/Deysha-Star-Formation,bollu/vispy,sh4wn/vispy,QuLogic/vispy,julienr/vispy,sh4wn/vispy,Eric89GXL/vispy,inclement/vispy,srinathv/vispy,bollu/vispy,jay3sh/vispy,bollu/vispy,hronoses/vispy,srinathv/vispy,sbtlaarzc/vispy,jay3sh/vispy,jdreaver/vispy,RebeccaWPerry/vispy,srinathv/vispy,jdreaver/vispy,inclement/vispy,drufat/vispy,sbtlaarzc/vispy,julienr/vispy,Eric89GXL/vispy,sbtlaarzc/vispy,kkuunnddaannkk/vispy,kkuunnddaannkk/vispy,QuLogic/vispy,ghisvail/vispy,jay3sh/vispy,drufat/vispy,QuLogic/vispy,Eric89GXL/vispy