c++ - QML渲染引擎: frame refresh event

Question

Performance Considerations And Suggestions文章说:

As an application developer, you must strive to allow the rendering engine to achieve a consistent 60 frames-per-second refresh rate. 60 FPS means that there is approximately 16 milliseconds between each frame in which processing can be done, which includes the processing required to upload the draw primitives to the graphics hardware.

是否有事件或信号或任何形式的回调来使代码在刷新时被调用？

目标是消除在 UI 线程槽中处理来自渲染线程的信号的需要。如果新数据到达，那么它将被绘制或标记为下一次刷新绘制(使用 update() 调用)。

Answer 1

QQuickWindow 有一堆信号用于同步 - beforeRendering()、afterRendering()、beforeSynchronizing() 、afterSynchronizing()、frameSwapped()。任君选择。