func render(wnd *glfwui.Window, app *app) {
wnd.MakeContextCurrent()
defer wnd.DetachContext()
blendish.Init()
for syncswap := range app.drawc {
draw(wnd, app)
if !syncswap {
app.donec <- true
}
wnd.SwapBuffers()
if syncswap {
app.donec <- true
}
}
}
