Skip to content

V3D/Broadcom (Raspberry Pi 4) - GLES 3.1 - GL_EXT_texture_norm16 advertised, but not usable

See attached apitrace file.

It might be that the driver doesn't support GL_EXT_texture_norm16 at all, or the extension is being advertised appropriately but isn't using the driver correctly.

Attempting to attach 16-bit textures results in GL_FRAMEBUFFER_UNSUPPORTED and the framebuffer remaining in an incomplete state.

Disabling GL_EXT_texture_norm16 on the app (in this case, a game) makes the framebuffer attachment work appropriately.

Details:

  • Raspberry Pi 4 (4GB)
  • Raspbian (Debian-based) (latest)
  • Mesa 19.3.2 (20.0.0 also tested)
  • OpenGL ES 3.1 (via SDL 2.0.8)

pi_glxinfo.log

taisei.1.trace

Edited by Alice D
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information