Framebuffer Abstraction

Framebuffer driver abstraction. More...

Collaboration diagram for Framebuffer Abstraction:

Detailed Description

Framebuffer driver abstraction.

Framebuffer devices are exposed as a /dev/fb/[id]/ directory, containing the following files:

• buffer: A file that can be mmaped to access the framebuffer memory.
• info: A read-only file that contains the fb_info_t struct for the framebuffer.

Data Structures
struct	fb_t
	Framebuffer structure. More...

Typedefs
typedef void *(*	fb_mmap_t) (fb_t *, void *, uint64_t, uint64_t *, pml_flags_t)
	Framebuffer mmap callback type.

Functions
fb_t *	fb_new (const fb_info_t *info, fb_mmap_t mmap)
	Allocate and initialize a framebuffer structure.
void	fb_free (fb_t *fb)
	Free and deinitialize a framebuffer structure.

Typedef Documentation

fb_mmap_t

typedef void *(* fb_mmap_t) (fb_t *, void *, uint64_t, uint64_t *, pml_flags_t)

Framebuffer mmap callback type.

Definition at line 27 of file fb.h.

Function Documentation

fb_new()

fb_t * fb_new	(	const fb_info_t *	info,
		fb_mmap_t	mmap
	)

Allocate and initialize a framebuffer structure.

Will make the framebuffer available under /dev/fb/[id].

Parameters

info	Pointer to the framebuffer information.
mmap	Function that user space will invoke to mmap the framebuffer.

Returns

On success, the new framebuffer structure. On failure, NULL and errno is set.

Definition at line 56 of file fb.c.

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fb_free()

void fb_free

(

fb_t *

fb

)

Free and deinitialize a framebuffer structure.

Removes the framebuffer from /dev/fb/[id].

Parameters

fb	Pointer to the framebuffer structure to free.

Definition at line 111 of file fb.c.