Perfect! Thank you so much, you've been very precious! :-D
Greetings,
Paolo
On Sun, Apr 19, 2015 at 10:15 PM, Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> On Sun, Apr 19, 2015 at 10:01 PM, Paolo Niccolò Giubelli
> <paoloniccolo.giubelli@xxxxxxxxx> wrote:
>> 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.
>>
>> 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?
>
> The only way to find out is to look at fb_fix_screeninfo.line_length.
>
> 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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