Need non-AWT ways to get display count, width, height, pixel density

Created by: benfry

We need either 1) an alternative/native method to make these work, or 2) a per-Surface version of them.

The second option is still problematic since we don't know what PSurface will be used when settings() is called. So either we need to start passing that to the command line, or do something more clever, i.e. once size() or fullScreen() is called, use the renderer to create an object that can handle these device settings on a per-surface type basis.

For now, displayWidth and displayHeight will be 0 when --disable-awt is used.

首先跟踪使用 --disable-awt 时如何处理 displayWidth、displayHeight 和像素密度，然后检查 issue 中提到的 size()、fullScreen()、renderer 和 PSurface 路径。完成的标准是提供一个已定义的非 AWT 实现或可行的按 Surface 处理方案，而不是为显示尺寸返回 0。