Fix uninitialized boolean rendering black videos on llvmpipe and macos, add 'block' parameter on the webui

Author: Tremeschin

DepthFlow/Resources/Shaders/DepthFlow.glsl

@@ -46,11 +46,10 @@ DepthFlow DepthMake(
     camera.zoom        += (depth.zoom - 1.0) + ((1/depth.away) - 1.0);
     camera.plane_point  = vec3(0.0, 0.0, depth.away);
     camera              = iCameraProject(camera);
+    depth.oob           = camera.out_of_bounds;
 
-    if (camera.out_of_bounds) {
-        depth.oob = true;
+    if (depth.oob)
         return depth;
-    }
 
     // Point where the ray intersects with the infinity plane, with a fixed point
     // pivoting around depth=steady. I do not know how the math works.

DepthFlow/Webui.py

@@ -141,6 +141,8 @@ def launch(self,
             help="Number of maximum concurrent renders")]=4,
         browser: Annotated[bool, typer.Option("--open", " /--no-open",
             help="Open the WebUI in the browser")]=True,
+        block: Annotated[bool, typer.Option("--block", "-b", " /--no-block",
+            help="Holds the main thread until the WebUI is closed")]=True,
     ) -> gradio.Blocks:
         with gradio.Blocks(
             theme=gradio.themes.Default(
@@ -288,6 +290,7 @@ def launch(self,
             allowed_paths=[DEPTHFLOW.DIRECTORIES.DATA],
             favicon_path=DEPTHFLOW.RESOURCES.ICON_PNG,
             inbrowser=browser, show_api=False,
+            prevent_thread_lock=(not block),
             max_threads=threads,
             server_name=server,
             server_port=port,