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NPAPI:AsyncDrawing: Difference between revisions
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→Throttling Painting
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void NPP_DidComposite(NPP instance); | void NPP_DidComposite(NPP instance); | ||
</pre> | </pre> | ||
== Hidden Plugins == | |||
While a plugin is in a hidden tab (or is hidden for some other reason), the browser doesn't have to fire NPP_DidComposite. When the plugin becomes visible, the browser won't wait for the plugin to re-render before compositing --- that would defeat the purpose of an asynchronous API. This could mean displaying an old, stale frame of the plugin for a moment. A plugin can mitigate this by calling SetCurrentAsyncSurface at a low rate even while DidComposite is not being received. In some situations it might be appropriate for a plugin to set the current surface to NULL while it's hidden (NPP_SetWindow having set an empty clip-rect); this would cause the plugin to render nothing instead of a stale frame when it becomes visible. | |||
= NPDrawingModelAsyncBitmapSurface = | = NPDrawingModelAsyncBitmapSurface = | ||