Re: [PATCH 0/1] MR8858: sane.ds: Adding saving scanner settings to the registry

[Ivan Lyugaev (＠valy)]

On Tue Sep  2 22:03:46 2025 +0000, Esme Povirk wrote:
> I'm not sure if this covers all potential option type+constraint
> combinations. We should probably print a FIXME if we get something
> unexpected, and maybe initialize these fields to something invalid?

This block repeats the initialization of the parameters in the InitializeDialog function.  I have saved only the necessary operations to generate the parameters.

`
else if (opt.type == TYPE_FIXED)
            {
                int pos, min, max, *sf;

if (opt.constraint.range.quant)
                {
                    min = opt.constraint.range.min / opt.constraint.range.quant;
                    max = opt.constraint.range.max / opt.constraint.range.quant;
                }
                else
                {
                    min = MulDiv( opt.constraint.range.min, 100, 65536 );
                    max = MulDiv( opt.constraint.range.max, 100, 65536 );
                }

SendMessageA(control,SBM_SETRANGE,min,max);

sf = calloc( opt.size, sizeof(int) );
                sane_option_get_value( i, sf );

/* Note that conversion of float -> SANE_Fixed is lossy;
                 *   and when you truncate it into an integer, you can get
                 *   unfortunate results.  This calculation attempts
                 *   to mitigate that harm */
                if (opt.constraint.range.quant)
                    pos = *sf / opt.constraint.range.quant;
                else
                    pos = MulDiv( *sf, 100, 65536 );

free(sf);
                SendMessageW(control, SBM_SETPOS, pos, TRUE);
                UpdateRelevantEdit(hwnd, &opt, pos);
            }
`