add a callback for GL program compilation (and instantiaion, since compilation also happens then)
add a callback for GL program compilation (and instantiaion, since compilation also happens then)

taylorhxu/tangram,tangrams/tangram,rosamcgee/tangram,xvilan/tangram,DHaylock/tangram,ceseale/tangram,taylorhxu/tangram,TitoAgudelo/tangram,zerebubuth/tangram,DHaylock/tangram,rosamcgee/tangram,zerebubuth/tangram,zerebubuth/tangram,ceseale/tangram,xvilan/tangram,tangrams/tangram,ceseale/tangram,TitoAgudelo/tangram,DHaylock/tangram,rosamcgee/tangram,taylorhxu/tangram,xvilan/tangram,TitoAgudelo/tangram