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Each terminal that loads the WebGL addon holds a live WebGL context for its whole lifetime, and all session panes stay mounted (hidden ones off-screen). Batch connect therefore created a WebGL context per host up front, contending for the GPU on the main thread — also the root of the "garbled / 花屏" corruption in #1049/#1063. Defer WebGL creation for panes that mount hidden (background tabs of a batch) and upgrade them on first visibility via an idempotent ensureWebglRenderer(); a hidden pane renders through xterm's DOM renderer until shown. Visible panes (single connect, the active tab) keep creating WebGL immediately — unchanged behavior. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
22 lines
970 B
TypeScript
22 lines
970 B
TypeScript
/**
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* Decide whether a terminal should postpone creating its WebGL renderer until
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* the pane is actually visible.
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*
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* Every terminal that loads the WebGL addon holds a live WebGL context for its
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* whole lifetime. Batch-connecting several hosts mounts all their panes at once,
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* so without deferral the renderer creates N WebGL contexts back-to-back on the
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* main thread (and N contexts contend for the GPU, which is also the root of the
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* "garbled / 花屏" corruption in #1049/#1063). A pane that mounts hidden does not
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* need a renderer yet — it buffers output via xterm's default DOM renderer and
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* upgrades to WebGL the moment it becomes visible.
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*
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* Visible panes (single connect, the active tab of a batch) keep the current
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* behavior: WebGL is created immediately.
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*/
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export function shouldDeferWebglUntilVisible(opts: {
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useWebGLAddon: boolean;
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initiallyVisible: boolean;
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}): boolean {
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return opts.useWebGLAddon && !opts.initiallyVisible;
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}
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