do not render frames, while window minimized

cmd/mxl-player/main.go

@@ -94,6 +94,7 @@ func cbytes(s string) *byte {
 }
 
 func main() {
+	var errMinimized = errors.New("Window minimized")
 	// TODO: remove flags defaults
 	mxlDomain := flag.String("d", "/dev/shm/mxl", "MXL domain")
 	mxlVideoFlowID := flag.String("v", "5fbec3b1-1b0f-417d-9059-8b94a47197ed", "MXL video flow UUID")
@@ -368,6 +369,9 @@ func main() {
 		if h > int32(caps.MaxImageExtent.Height) {
 			h = int32(caps.MaxImageExtent.Height)
 		}
+		if w == 0 || h == 0 {
+			return errMinimized
+		}
 		vkExtent = vk.Extent2D{Width: uint32(w), Height: uint32(h)}
 
 		vkSwapchain, err = vkDevice.CreateSwapchain(vk.SwapchainConfig{
@@ -534,6 +538,10 @@ func main() {
 		}
 		if resized {
 			if err := recreateSwapChain(); err != nil {
+				if errors.Is(err, errMinimized) {
+					resized = true
+					continue
+				}
 				panic(err)
 			}
 			resized = false
@@ -542,6 +550,10 @@ func main() {
 		imageIndex, r := vkDevice.AcquireNextImage(vkSwapchain, imageAvailable, ^uint64(0))
 		if r == vk.ErrorOutOfDateKHR || r == vk.SuboptimalKHR {
 			if err := recreateSwapChain(); err != nil {
+				if errors.Is(err, errMinimized) {
+					resized = true
+					continue
+				}
 				panic(err)
 			}
 			continue
@@ -643,6 +655,10 @@ func main() {
 		r = vkQueue.Present(vkSwapchain, imageIndex, renderFinished)
 		if r == vk.ErrorOutOfDateKHR || r == vk.SuboptimalKHR {
 			if err := recreateSwapChain(); err != nil {
+				if errors.Is(err, errMinimized) {
+					resized = true
+					continue
+				}
 				panic(err)
 			}
 			continue