ui: Bug fix: Sizing also calls GLContext

internal/loop/run.go

@@ -115,6 +115,7 @@ func Run(g GraphicsContext, width, height int, scale float64, title string, fps
 			if err := g.SetSize(e.Width, e.Height, e.ActualScale); err != nil {
 				return err
 			}
+			e.Done <- struct{}{}
 		case ui.CloseEvent:
 			return nil
 		case ui.RenderEvent:

internal/ui/event.go

@@ -21,6 +21,7 @@ type ScreenSizeEvent struct {
 	Width       int
 	Height      int
 	ActualScale float64
+	Done        chan struct{}
 }
 
 type RenderEvent struct {

internal/ui/ui_glfw.go

@@ -191,6 +191,7 @@ func (u *userInterface) Update() (interface{}, error) {
 			Width:       u.width,
 			Height:      u.height,
 			ActualScale: u.actualScreenScale(),
+			Done:        make(chan struct{}, 1),
 		}
 		return nil
 	})

internal/ui/ui_js.go

@@ -96,6 +96,7 @@ func (u *userInterface) Update() (interface{}, error) {
 			Width:       w,
 			Height:      h,
 			ActualScale: u.ActualScreenScale(),
+			Done:        make(chan struct{}, 1),
 		}
 		return e, nil
 	}

internal/ui/ui_mobile.go

@@ -83,11 +83,14 @@ func (u *userInterface) Terminate() error {
 
 func (u *userInterface) Update() (interface{}, error) {
 	if u.sizeChanged {
+		// Sizing also calls GL functions
+		<-chRender
 		u.sizeChanged = false
 		e := ScreenSizeEvent{
 			Width:       u.width,
 			Height:      u.height,
 			ActualScale: u.actualScreenScale(),
+			Done:        chRenderEnd,
 		}
 		return e, nil
 	}