[triniwiz]

Brings the docs up to date with @nativescript/canvas 3.0.0.

New pages

• OffscreenCanvas and Workers (/canvas/guides/offscreen-canvas): drawing with no view, transferControlToOffscreen(), and rendering in a Worker. Android and iOS send a handle with OffscreenCanvas._toHandle(), and Windows uses a postMessage transfer list. Includes one version that works on every runtime.
• Web API Compatibility (/canvas/compatibility): every interface, with what is supported, what is a no-op, and what isn't available yet.
• canvas-svg Styling (/canvas-svg/guides/styling): the stylesheet property, view styles the document inherits, and the supported selectors.

Updated

• Installation: Windows and Linux in the platform table. The context table shows the backend each context uses on each platform.
• Performance:
  • Threaded rendering: 2D and WebGL do their GPU work on another thread by default on Android, iOS and Windows. Covers which calls wait for that thread, how requestAnimationFrame holds back, and how to opt out.
  • Memory: encoded images stay encoded, V8 sees image memory, and unused GPU resources are freed.
• Rendering Contexts / API Overview: the threaded attribute, Canvas.threaded2D / threadedWebGL, @nativescript/canvas/worker, and the OffscreenCanvas globals.
• Images and ImageBitmap:
  • ImageAsset.toImageSource() and toNativeImage().
  • createImageBitmap rejects bytes it can't decode.
  • A WebGPU canvas works as a WebGL texImage2D source on Windows and Linux.
• Upgrading to 3.0: a Threading section, plus the WebGL, image and svg behaviour changes that landed late in the 3.0 cycle.
• WebGPU recipes / canvas-media: importExternalTexture now works on Android 10+ (with an RGB decoder), Windows and Linux. Previously documented as throwing on Android.
• canvas-svg: the stylesheet property and error event. CSS animations can be started by any selector, not only #id.
• Gamepad, audio-context, polyfill, events, home pages: Windows and Linux where each package supports them.

vitepress build passes, including its dead-link check. In-page anchors were checked against the built HTML.

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