[nvda] Re: What would it take for a graphics dictionary

Hi Michael,
A graphics dictionary in other screen readers is indeed just that - a list of graphics and text descriptions. Tne general idea is that graphics are assigned a number which can hopefully be guaranteed to be the same across instances of the application or different systems (if the colour settings are the same). Any screen reader tries not to rely on graphics except where there is no other decently reliable/fast way, so there's no reason it should swamp your hdd.
A graphics dictionary or even the ability to read graphics is totally out of the question for NVDA at present, as we have no video intercept or display hooks, which is required for obtaining such information. There has been a lot of discussion on display hooking and the like; see the archives for more info. 

Jamie

Michael Whapples wrote:

Hello,
There was a question about nvda and outlook express and the status of messages, and the answer someone suggested is that it is done with graphics. This leads me to the question, if it is graphics, are the other screen readers doing it through graphic dictionaries, and what would this take to be implemented in nvda? How do they identify different graphics? Surely not just with a list of graphics and an associated text description, or is it really that basic (and if so how do you stop it swamping your HD?) So how valuable would a graphics dictionary be, and how many uses would it have? Considering that is it something that needs further consideration at the moment, or can it wait? I know there are certainly other areas which will improve the usability of NVDA, I would just like to get an idea of what will yield the best results for the time spent on it, so an idea of the priorities and where a graphics dictionary is in the list. From 
Michael Whapples


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