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- Frame Buffer Library
- ====================
- The frame buffer drivers depend heavily on four data structures. These
- structures are declared in include/linux/fb.h. They are fb_info,
- fb_var_screeninfo, fb_fix_screeninfo and fb_monospecs. The last
- three can be made available to and from userland.
- fb_info defines the current state of a particular video card. Inside
- fb_info, there exists a fb_ops structure which is a collection of
- needed functions to make fbdev and fbcon work. fb_info is only visible
- to the kernel.
- fb_var_screeninfo is used to describe the features of a video card
- that are user defined. With fb_var_screeninfo, things such as depth
- and the resolution may be defined.
- The next structure is fb_fix_screeninfo. This defines the properties
- of a card that are created when a mode is set and can't be changed
- otherwise. A good example of this is the start of the frame buffer
- memory. This "locks" the address of the frame buffer memory, so that it
- cannot be changed or moved.
- The last structure is fb_monospecs. In the old API, there was little
- importance for fb_monospecs. This allowed for forbidden things such as
- setting a mode of 800x600 on a fix frequency monitor. With the new API,
- fb_monospecs prevents such things, and if used correctly, can prevent a
- monitor from being cooked. fb_monospecs will not be useful until
- kernels 2.5.x.
- Frame Buffer Memory
- -------------------
- .. kernel-doc:: drivers/video/fbdev/core/fbmem.c
- :export:
- Frame Buffer Colormap
- ---------------------
- .. kernel-doc:: drivers/video/fbdev/core/fbcmap.c
- :export:
- Frame Buffer Video Mode Database
- --------------------------------
- .. kernel-doc:: drivers/video/fbdev/core/modedb.c
- :internal:
- .. kernel-doc:: drivers/video/fbdev/core/modedb.c
- :export:
- Frame Buffer Macintosh Video Mode Database
- ------------------------------------------
- .. kernel-doc:: drivers/video/fbdev/macmodes.c
- :export:
- Frame Buffer Fonts
- ------------------
- Refer to the file lib/fonts/fonts.c for more information.
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