CODEWITHSUNDEEP
cgraphics
C32
C32

Reputation: 161

How can I write faster to the frame buffer on C?

I'm currently writing a program that involves graphics. After some thought I decided to write directly to the frame buffer on /dev/fb0 and the code is working great but the writing speed is slow. It takes 0.161s to write a blank screen (0.213s is the program with the fb0 writing and 0.052s is the program without writing to fb) which means 6fps without any 3d rendering. Is there a way to write faster to a file like the /dev/fb0 on C? I'm currently using fb = freopen("/dev/fb0","w",stdout); to open the file and the regular printfto write to the file, also the display is 320x240. Thanks :)

Upvotes: 2

Views: 2132

Answers (1)

Davislor
Davislor

Reputation: 15134

You can map the framebuffer device into memory using mmap() and blit to and from it with memcpy() or pointers. Unless you are running X windows, in which case you need to go through an API such as X11, OpenGL or SDL.

Upvotes: 2

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