Oliver Rauch, Mittwoch, 18. Dezember 2002 16:46: > On Wednesday 18 December 2002 11:55, Henning Meier-Geinitz wrote: > Please can you point me to the paragraph where you think it is > mentioned that it is not allowed to change constraints and option sizes?
2 problems: - The frontend is allowed to ignore the info parameter in sane_control_option completely (i.e. it can be set to 0). If you allow this, you can't change e.g. the option size (only possible, if you *force* the frontend to reload the options) - Nothing in the standard states, that an option descriptor can only be changed by the backend after a call to sane_control_option. If you allow changes to the option size, a frontend would have to requery the option descriptors *every time* before it can safely set an option. bb Michael
