The Agar wgl driver provides a direct interface to the Windows API, and renders GUI elements using OpenGL primitives and textures. On the Windows platform, wgl is usually the default driver.

AG_Driver(3)-> AG_DriverMw(3)-> AG_DriverWGL.

debug	Capture GL_DEBUG_OUTPUT errors.
stereo	Request a stereoscopic visual.

AG_Driver(3), AG_DriverMw(3), AG_GL(3), AG_InitGraphics(3), AG_Intro(3)

•  OpenGL
  
•  Microsoft Learn

The wgl driver first appeared in Agar 1.4.0. The "debug" option appeared in Agar 1.6.0.