Detect HW acceleration; default lava off on software renderer; release probe WebGL context

Probes UNMASKED_RENDERER_WEBGL once per page via a throwaway WebGL context; defaults the lava subsystem off on a positive software-renderer match or total WebGL failure; releases the throwaway context via WEBGL_lose_context after reading the renderer string to avoid exhausting the browser's per-page context limit.
2026-06-26 10:41:07 -04:00
parent 0e8b85bbcb
commit 020a945843
6 changed files with 398 additions and 0 deletions
@@ -265,6 +265,24 @@ public partial class WaveformVisualizer : ComponentBase, IAsyncDisposable
                return;
            }

+            // Apply the hardware-capability default ONCE per session before seeding the controls: if the
+            // browser has no WebGL hardware acceleration, the lava subsystem (which software-renders on
+            // the main thread and starves audio decode) defaults off while the waveform stays on. The
+            // probe lives in JS (it needs a real WebGL context); the scoped state guards the one-time
+            // application, so a remounted visualizer never re-applies and a later explicit toggle is
+            // never clobbered. Sequenced before PushControlsAsync so the seed already carries the
+            // corrected enables; ApplyCapabilityDefault also raises Changed for the controls UI.
+            try
+            {
+                var hardwareAccelerated = await _module.InvokeAsync<bool>("detectHardwareAcceleration");
+                ControlState.ApplyCapabilityDefault(hardwareAccelerated);
+            }
+            catch (JSException ex)
+            {
+                // A probe failure must not regress the HW-accel majority: leave the defaults (lava on).
+                Logger.LogWarning(ex, "WaveformVisualizer: hardware-acceleration probe failed; leaving lava at its default.");
+            }
+
            // Seed the module with the current state now that it exists. All control values (the eight
            // dials + the two Phase 15 subsystem enables) come from the shared (session-persisted) state,
            // so a mix opened mid-session seeds the module with the knob/toggle positions the listener