[sane-devel] Calculating maxlen

[Paul]

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Hi,

> max_len is set by the frontend. The buffer is allocated by the frontend
> and the size of the buffer must be at least max_len bytes.
>=20
> max_len and the size of the buffer are arbitary. The backend must be
> able to handle each size from max_len=3D1 to max_len > size of the image.

Okay, I need to be clear here.

max_len is some size large enough to scan something in. How do I know
how big to make this to (say) scan an A4 picture at 8bpp resolution? To
me, it looks like I multiply bytes_per_line * pixels_per_line * lines *
depth to accomodate everything.

I'm currently toying with the code so I know what has to be done when it
comes to implementing the code for real.

TTFN

Paul
--=20
Homer: Donut?=20
Lisa: No, thanks. Do you have any fruit?=20
Homer: This has purple stuff inside. Purple is a fruit.

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