func windowDraw(w *C.ANativeWindow, queue *C.AInputQueue, donec chan struct{}) (done bool) {
C.createEGLWindow(w)
// TODO: is this needed if we also have the "case <-windowRedrawNeeded:" below??
sendLifecycle(lifecycle.StageFocused)
eventsIn <- config.Event{
Width: geom.Pt(float32(C.windowWidth) / pixelsPerPt),
Height: geom.Pt(float32(C.windowHeight) / pixelsPerPt),
PixelsPerPt: pixelsPerPt,
}
if firstWindowDraw {
firstWindowDraw = false
// TODO: be more principled about when to send a paint event.
eventsIn <- paint.Event{}
}
for {
processEvents(queue)
select {
case <-donec:
return true
case <-windowRedrawNeeded:
// Re-query the width and height.
C.querySurfaceWidthAndHeight()
sendLifecycle(lifecycle.StageFocused)
eventsIn <- config.Event{
Width: geom.Pt(float32(C.windowWidth) / pixelsPerPt),
Height: geom.Pt(float32(C.windowHeight) / pixelsPerPt),
PixelsPerPt: pixelsPerPt,
}
case <-windowDestroyed:
sendLifecycle(lifecycle.StageAlive)
return false
case <-gl.WorkAvailable:
gl.DoWork()
case <-endDraw:
// eglSwapBuffers blocks until vsync.
C.eglSwapBuffers(C.display, C.surface)
eventsIn <- paint.Event{}
}
}
}
func windowDraw(w *C.ANativeWindow, queue *C.AInputQueue, donec chan struct{}) (done bool) {
C.createEGLWindow(w)
// TODO: is this needed if we also have the "case <-windowRedrawNeeded:" below??
sendLifecycle(event.LifecycleStageFocused)
eventsIn <- event.Config{
Width: geom.Pt(float32(C.windowWidth) / pixelsPerPt),
Height: geom.Pt(float32(C.windowHeight) / pixelsPerPt),
PixelsPerPt: pixelsPerPt,
}
if firstWindowDraw {
firstWindowDraw = false
// TODO: be more principled about when to send a draw event.
eventsIn <- event.Draw{}
}
for {
processEvents(queue)
select {
case <-donec:
return true
case <-windowRedrawNeeded:
// Re-query the width and height.
C.querySurfaceWidthAndHeight()
sendLifecycle(event.LifecycleStageFocused)
eventsIn <- event.Config{
Width: geom.Pt(float32(C.windowWidth) / pixelsPerPt),
Height: geom.Pt(float32(C.windowHeight) / pixelsPerPt),
PixelsPerPt: pixelsPerPt,
}
// This gl.Viewport call has to be in a separate goroutine because any gl
// call can block until gl.DoWork is called, but this goroutine is the one
// responsible for calling gl.DoWork.
// TODO: again, should x/mobile/app be responsible for calling GL code, or
// should package gl instead call event.RegisterFilter?
{
c := make(chan struct{})
go func() {
gl.Viewport(0, 0, int(C.windowWidth), int(C.windowHeight))
close(c)
}()
loop1:
for {
select {
case <-gl.WorkAvailable:
gl.DoWork()
case <-c:
break loop1
}
}
}
case <-windowDestroyed:
sendLifecycle(event.LifecycleStageAlive)
return false
case <-gl.WorkAvailable:
gl.DoWork()
case <-endDraw:
// eglSwapBuffers blocks until vsync.
C.eglSwapBuffers(C.display, C.surface)
eventsIn <- event.Draw{}
}
}
}