Thank you Geert! So I guess there's some kind of padding after the end
of the line, where I can write anything that has no effect. Do you
know if there's something to check into fb.h so to guess the alignment
requirements?
Greetings,
Paolo Niccolò
On Sun, Apr 19, 2015 at 9:29 PM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> On Sun, Apr 19, 2015 at 7:39 PM, Paolo Niccolò Giubelli
> <paoloniccolo.giubelli@xxxxxxxxx> wrote:
>> There's something wrong with the math, because i have a 1366x768x32
>> FB, but my finfo.line_length (finfo is obtained via
>> FBIOGET_FSCREENINFO) is 5504 bytes. Well, 5504/4 (4 is 4 bytes per
>> pixel) is 1376 that is 10 pixels more than 1366.
>
> 1366 * 4 is not a multiple of 64. 5504 is.
> I guess your hardware requires each line to start at an address which is a
> multiple of 64.
>
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
> -- Linus Torvalds
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