func render(sdlrenderer *clingon.SDLRenderer, updatedRects []sdl.Rect, y int16) {
if updatedRects == nil {
appSurface.Blit(nil, gopher, nil)
appSurface.Blit(&sdl.Rect{consoleX, y, 0, 0}, sdlrenderer.GetSurface(), nil)
appSurface.Flip()
} else {
for _, r := range updatedRects {
appSurface.Blit(&sdl.Rect{r.X + consoleX, r.Y + consoleY, 0, 0}, gopher, &sdl.Rect{r.X + consoleX, r.Y + consoleY, r.W, r.H})
appSurface.Blit(&sdl.Rect{consoleX, consoleY, 0, 0}, sdlrenderer.GetSurface(), &sdl.Rect{0, 0, consoleW, consoleH})
appSurface.UpdateRect(int32(r.X+consoleX), int32(r.Y+consoleY), uint32(r.W), uint32(r.H))
}
}
}
func newRenderingLoop(sdlrenderer *clingon.SDLRenderer) {
go func() {
var y int16
breakLoop := make(chan byte)
var animationValueCh <-chan float64 = nil
var animationDirection int
loop:
for {
select {
case <-terminateRendering:
go func() {
done := make(chan bool)
sdlrenderer.EventCh() <- clingon.Cmd_Terminate{done}
<-done
breakLoop <- 0
}()
case <-breakLoop:
renderingLoopTerminated <- 0
break loop
case animationSpec := <-animationCh:
animationValueCh = animationSpec.animation.ValueCh()
animationDirection = animationSpec.direction
case value := <-animationValueCh:
if animationDirection == clingon.SCROLL_DOWN {
y = 40 + int16(value)
} else {
y = appSurfaceH - int16(value)
}
render(sdlrenderer, nil, y)
case rects := <-sdlrenderer.UpdatedRectsCh():
render(sdlrenderer, rects, y)
}
}
}()
}