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Altera_Forum's avatar
Altera_Forum
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19 years ago

SDL Graphics library usage on NIOS II

Hi, Im trying to use SDL (Simple DirectMedia Layer) which is a cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Hi,

i run successfuly SDL on Nios2. Using the VGA framebuffer from nioswiki and

libsdl from blackfin uclinux. But it is real slooow with fbcon output and even slooooower

with nano-X output http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif

Libsdl from blackfin uclinux is stock libsdl with some MAP_SHARED/MAP_PRIVATE patches in video_fbcon.c for dealing with nommu targets.

I guess the framebuffer from nioswiki is not realy the best choice for fast graphics , it lacks on burst memory interface and does not support dubble buffering in uclinux(?).

Let me know if you need my libsdl sources.

Claude

btw: does anybody know how to use the nios2 fpu in uclinux ? using soft float with

graphics make things even worse. glxgears with 0.5fps makes me dizzy http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/blink.gif