Chromium overlay prioritizer
暴露 overlay 委托优先级排序提示功能的全局接口，用于为 wl_surface 对象实例化接口扩展。此扩展接口将允许对 surface 进行委托 overlay 优先级排序。
destroy()
通知服务器客户端将不再使用此协议对象。这不会影响任何其他对象，包括 prioritizer 对象。
get_overlay_prioritized_surface(id: new_id<overlay_prioritized_surface>, surface: object<wl_surface>)
参数 | 类型 | 描述 |
|---|---|---|
| id | new_id<overlay_prioritized_surface> | the new prioritized interface id |
| surface | object<wl_surface> | the surface |
为给定的 wl_surface 实例化接口扩展，以添加 overlay 优先级排序提示支持。如果给定的 wl_surface 已经关联了 prioritization 对象，将产生 delegate_exists 协议错误。
error { overlay_hinted_surface_exists }
参数 | 值 | 描述 |
|---|---|---|
| overlay_hinted_surface_exists | 0 | 该 surface 已经关联了 prioritizer 对象 |
wl_surface 对象的附加接口，允许客户端为 surface 的 overlay 优先级排序指定提示。
destroy()
关联的 wl_surface 的 overlay 优先级排序将被移除。 更改在下次 wl_surface.commit 时生效。
error { bad_value, no_surface }
参数 | 值 | 描述 |
|---|---|---|
| bad_value | 0 | 半径或大小中的负值 |
| no_surface | 1 | wl_surface 已被销毁 |
overlay_priority { none, regular, preferred_low_latency_canvas, required_hardware_protection }
参数 | 值 | 描述 |
|---|---|---|
| none | 0 | 此 surface 不需要 overlay 提升 |
| regular | 1 | surface 可被视为提升候选 |
| preferred_low_latency_canvas | 2 | 该 surface 是低延迟画布，提升为 overlay 效果更好 |
| required_hardware_protection | 3 | 该 surface 包含受保护内容，需要提升为 overlay |
合成器支持
Copyright
Copyright 2021 The Chromium Authors
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