nanogui@linuxhacker.org

 I interpreted the code to be "don't paint
: unless native PF_PIXELVAL is specified by the client, which in retrospect
: seems so stupid that I should have realised the mistake was on my part!

The proper interpretation is "don't call the low level driver
routine directly unless the pixel format is in the hw pixel format"
Otherwise the code drops through to the conversion routines below...

Regards,

Greg