PUSH_BUFFERS 类型的 SurfaceView

发布于 2024-09-30 06:10:08 字数 519 浏览 3 评论 0原文

我对 SurfaceView 有一些经验。为了防止不必要的重绘，我总是使用倒计时变量来告诉线程应该绘制视图的频率。

countdown > 0 : draw ? doNothing

然而我正在考虑改变它以使用“推动表面”。因此，只需将缓冲区推到表面并显示即可，而不是在项目中的任何地方设置倒计时变量。

我的问题是我找不到描述用法的好教程/资源。目前我有这样的事情：

// panel is the SurfaceView
c = panel.getHolder().lockCanvas(null);
synchronized (panel.getHolder()) {
    panel.updatePhysics();
    panel.onDraw(c);
}
panel.getHolder().unlockCanvasAndPost(c);

当我无法使用文档中提到的 lockCanvas() 时，我不知道如何让画布进行绘制。

原文

I have some experience with the SurfaceView. To prevent unneeded redrawing, I always use a countdown variable which tells the thread how often the view should be drawn.

countdown > 0 : draw ? doNothing

However I was thinking about changing that to use a "push surface". So just push a buffer to the surface and show that instead of setting a countdown variable everywhere in my project.

My problem is that I can't find a good tutorial/resource where the usage is described. Currently I have something like this:

// panel is the SurfaceView
c = panel.getHolder().lockCanvas(null);
synchronized (panel.getHolder()) {
    panel.updatePhysics();
    panel.onDraw(c);
}
panel.getHolder().unlockCanvasAndPost(c);

I have no idea on how to get the canvas to draw on when I can't use lockCanvas() as mentioned in the documentation.

分享到QQ

分享到微博