accessing the contents of video memory

Elvis Y. Tamayo Moyares etmoyares at
Sat Jan 15 13:55:21 EST 2011

Hello list. How I can access the video memory directly from user  
space? I tried to map the framebuffer (/dev/fb0) using mmap() and  
ioctl(), but I have not been successful. Really I want to make a copy  
of the contents of video memory and save it  as an image. have any  

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