Ben> Alex Riedel <riedel@taraz.kz> writes: 1) Can - whether the user
> program use Framebuffer Directly (etc. memcpy ()) or only through
> FB API?
Ben> The framebuffer API doesn't provide any functions for writing to
Ben> the framebuffer, actually. At least not AFAIK. In general, you
Ben> must mmap() the framebuffer device and write to it yourself.
Say again?
>From drivers/video/fbmem.c:
static ssize_t
fb_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
static ssize_t
fb_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
Yes you can read/write to the frame buffer memory, though in most
cases it makes a lot more sense to mmap() it and access it directly.
Jes
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/