GUI fields now trim leading and trailing whitespace:

internal/renderer/renderer.go

@@ -455,7 +455,12 @@ func validateFramePayload(
 
 // DrawFrame acquires an image, records commands, submits, and presents.
 // Returns ErrOutOfDate if the swapchain needs recreation
-func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
+func (r *Renderer) DrawFrame(
+	videoW uint32,
+	videoH uint32,
+	stride uint32,
+	showVideo bool,
+) error {
 	imageIndex, res := r.dev.AcquireNextImage(r.swapchain, r.imageAvailable, ^uint64(0))
 	if res == vk.ErrorOutOfDateKHR || res == vk.SuboptimalKHR {
 		return ErrOutOfDate
@@ -483,7 +488,7 @@ func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
 		r.fbs[imageIndex],
 		vk.Rect2D{Offset: vk.Offset2D{X: 0, Y: 0}, Extent: r.extent},
 		[]vk.ClearValue{
-			vk.ClearColor(0.0, 0.0, 0.0, 1.0),
+			vk.ClearColor(0.025, 0.03, 0.04, 1.0),
 			vk.ClearDepthStencil(1.0, 0),
 		},
 	)
@@ -494,17 +499,19 @@ func (r *Renderer) DrawFrame(videoW, videoH, stride uint32) error {
 		MinDepth: 0, MaxDepth: 1,
 	})
 	cmd.SetScissor(vk.Rect2D{Offset: vk.Offset2D{X: 0, Y: 0}, Extent: r.extent})
-	cmd.BindPipeline(r.decodePipeline)
-	cmd.BindDescriptorSet(r.decodeLayout, 0, r.decodeSet)
-	pc := PushConstants{
-		Width:       videoW,
-		Height:      videoH,
-		StrideBytes: stride,
-		WinW:        r.extent.Width,
-		WinH:        r.extent.Height,
+	if showVideo {
+		cmd.BindPipeline(r.decodePipeline)
+		cmd.BindDescriptorSet(r.decodeLayout, 0, r.decodeSet)
+		pc := PushConstants{
+			Width:       videoW,
+			Height:      videoH,
+			StrideBytes: stride,
+			WinW:        r.extent.Width,
+			WinH:        r.extent.Height,
+		}
+		cmd.PushConstants(r.decodeLayout, vk.ShaderStageFragment, 0, unsafe.Pointer(&pc), 20)
+		cmd.Draw(3, 1, 0, 0)
 	}
-	cmd.PushConstants(r.decodeLayout, vk.ShaderStageFragment, 0, unsafe.Pointer(&pc), 20)
-	cmd.Draw(3, 1, 0, 0)
 	if r.ImGuiDraw != nil {
 		r.ImGuiDraw(cmd)
 	}