opengl: Add context.DoWork (mobile)

internal/graphics/opengl/context_mobile.go

@@ -71,6 +71,26 @@ func NewContext() (*Context, error) {
 	return c, nil
 }
 
+func (c *Context) DoWork(chError <-chan error, chDone <-chan struct{}) error {
+	// TODO: Check this is called on the rendering thread
+loop:
+	for {
+		select {
+		case err := <-chError:
+			return err
+		case <-c.worker.WorkAvailable():
+			c.worker.DoWork()
+		default:
+			select {
+			case <-chDone:
+				break loop
+			default:
+			}
+		}
+	}
+	return nil
+}
+
 func (c *Context) Reset() error {
 	c.locationCache = newLocationCache()
 	c.lastFramebuffer = invalidFramebuffer
@@ -85,10 +105,6 @@ func (c *Context) Reset() error {
 	return nil
 }
 
-func (c *Context) Worker() mgl.Worker {
-	return c.worker
-}
-
 func (c *Context) BlendFunc(mode CompositeMode) {
 	gl := c.gl
 	if c.lastCompositeMode == mode {

internal/ui/ui_mobile.go

@@ -42,34 +42,13 @@ func Render(chError <-chan error) error {
 	// TODO: Check this is called on the rendering thread
 	select {
 	case chRender <- struct{}{}:
-		return doGLWorks(chError, chRenderEnd)
+		return glContext.DoWork(chError, chRenderEnd)
 	case <-time.After(500 * time.Millisecond):
 		// This function must not be blocked. We need to break for timeout.
 		return nil
 	}
 }
 
-func doGLWorks(chError <-chan error, chDone <-chan struct{}) error {
-	// TODO: Check this is called on the rendering thread
-	worker := glContext.Worker()
-loop:
-	for {
-		select {
-		case err := <-chError:
-			return err
-		case <-worker.WorkAvailable():
-			worker.DoWork()
-		default:
-			select {
-			case <-chDone:
-				break loop
-			default:
-			}
-		}
-	}
-	return nil
-}
-
 type userInterface struct {
 	width       int
 	height      int