A 2D graphics engine with audio support.
Uses OpenGL 2.0 and above.
If you use audio feature, alsa delevopment libraries are required for Linux: libasound2-dev for Debian and Ubuntu, alsa-lib-devel for Fedora (see cpal).
Default features = ["texturegraphics", "simplegraphics", "text_graphics"]
Other features = ["audio", "mousecursoricon", "auto_hide"]
Enables to use audio output.
Replaces the default mouse cursor with user's image.
The cursor points to the center of the image.
The default path to the image is ./mouse_cursor_icon.png.
The window gets minimized when loses focus and it stops sending outer events, except gained focus event. The window gets back when it gains focus.