test(terminal): profile webgl render stages

app/src/terminal/component.rs

@@ -28,7 +28,7 @@ use super::mouse::{
 use super::protocol::{ClientTerminalMessage, ServerTerminalMessage};
 use super::renderer::{
     CanvasDomState, CanvasPlanInput, CanvasSurfaceFrame, CanvasSurfaceMode,
-    RenderCanvasSurfaceRequest, WebGlContextLifecycle, WebGlRendererState,
+    RenderCanvasSurfaceRequest, WebGlContextLifecycle, WebGlRenderStats, WebGlRendererState,
     attach_webgl_context_lifecycle, canvas_render_plan, render_canvas_surface, render_webgl,
     set_canvas_surface_mode, webgl_surface_mode,
 };
@@ -235,7 +235,7 @@ pub struct TerminalSelectionEvent {
     pub end: Option<(usize, usize)>,
 }
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub struct TerminalRenderEvent {
     pub cols: u16,
     pub rows: u16,
@@ -243,6 +243,7 @@ pub struct TerminalRenderEvent {
     pub screen_rows: usize,
     pub mode: ViewMode,
     pub renderer: Renderer,
+    pub webgl_stats: Option<WebGlRenderStats>,
 }
 
 type SerializeFn = Arc<dyn Fn() -> String + Send + Sync>;
@@ -514,6 +515,7 @@ pub fn TerminalPanel(
     let selecting = RwSignal::new(false);
     let search_match = RwSignal::new(None::<TerminalSearchMatch>);
     let search_query = RwSignal::new(String::new());
+    let last_webgl_stats = RwSignal::new(None::<WebGlRenderStats>);
 
     // IME composition state: when true, regular `input` events are ignored and
     // the final composed string is sent on `compositionend`.
@@ -624,6 +626,7 @@ pub fn TerminalPanel(
             screen_rows: core.screen_rows().len(),
             mode,
             renderer,
+            webgl_stats: last_webgl_stats.get_untracked(),
         }) {
             on_render.run(event);
         }
@@ -921,15 +924,14 @@ pub fn TerminalPanel(
         };
         match renderer {
             Renderer::WebGl => {
-                if render_webgl(
+                if let Ok(stats) = render_webgl(
                     canvas_el,
                     frame,
                     &canvas_state,
                     &webgl_state,
                     &webgl_context_lost,
-                )
-                .is_ok()
-                {
+                ) {
+                    last_webgl_stats.set(Some(stats));
                     set_canvas_surface_mode(
                         canvas_el,
                         fallback_canvas_el,
@@ -941,6 +943,7 @@ pub fn TerminalPanel(
                         fallback_canvas_el,
                         webgl_surface_mode(false),
                     );
+                    last_webgl_stats.set(None);
                     render_canvas_surface(RenderCanvasSurfaceRequest {
                         canvas_el: fallback_canvas_el,
                         frame,
@@ -949,6 +952,7 @@ pub fn TerminalPanel(
                 }
             }
             Renderer::Canvas => {
+                last_webgl_stats.set(None);
                 set_canvas_surface_mode(canvas_el, fallback_canvas_el, CanvasSurfaceMode::WebGl);
                 render_canvas_surface(RenderCanvasSurfaceRequest {
                     canvas_el,
@@ -956,7 +960,9 @@ pub fn TerminalPanel(
                     canvas_state: &canvas_state,
                 });
             }
-            Renderer::Dom => {}
+            Renderer::Dom => {
+                last_webgl_stats.set(None);
+            }
         }
     });