The redraw refresh code of PicViewCtrl is not efficient

[XimingCheng]

The redraw refresh code of PicViewCtrl is not efficient so that the CU split redraw is very slow.
系统重绘效率过低，后续绘图任务加剧，导致在画面移动鼠标会感觉到卡顿。不好的用户体验！
需要计算出部分重绘区域而不是全局区域，重绘只需要部分重绘，减少CPU使用。

[fengshikun]

Hasn't this issue been solved yet?

[XimingCheng]

This project is now deprecated for my personal reason, and I am trying to develop a more stable version based on OpenHEVC decoder, thanks for comments.

[SurrealSky]

visual 2019 编译有问题？无法通过。