Does any body have an example, info or pointer to as such
that will show me how to write graphics programs on Linux using
system calls and no library or even X server for that ?

thanks in advance

No X? Only using a framebuffer, but then you are limited to console. Look for programs like fbi for example code.

I Googled for fbi but to no avail.

Can someone help me ?

You may want to look at http://asm.sourceforge.net/articles/fb.html (targets NASM, but should show the basic approach pretty well).

The Allegro library has excellent support for Frame Buffer device !

it does, but F45M did not want to use any libraries.

i bet it would be some writing to /dev/something

Yeah, you could simply do writing to the /dev/fb0 device, which is provided by the kernel driver for your framebuffer device (that's if the driver has been compiled into the kernel, different distros have different configurations for the kernel, some will include loads, some will have less drivers. You could always recompile the kernel to make sure that the driver was included, theres plenty of guides on the internet to tell you how.) And then you would have to find some kind of documentation for the framebuffer device provided by the kernel, such as what format the data put into /dev/fb0 should be, 8bpp, 16bpp, etc..

It is deffinetly possible to implement graphics without X nor any library, (X even comes in a frame-buffer compatible version, which instead of using it's own display drivers, just sits on top of the framebuffer, that could always be a place to look for example code on writting to the framebuffer device.) It'll just take some time and some research into the implementation of the framebuffer.

It's called FBUI:

http://home.comcast.net/~fbui/index.html