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[Bug 13514] Support different resolutions for command elements and images

From: <bugzilla@jessica.w3.org>
Date: Mon, 16 Jan 2012 22:10:42 +0000
To: public-html-a11y@w3.org
Message-Id: <E1RmulG-0008T9-Pp@jessica.w3.org>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=13514

--- Comment #7 from Greg Lowney <gcl-0039@access-research.org> 2012-01-16 22:10:41 UTC ---
Scalable images would address the problem of larger images, but it fails to
address other use cases. Ideally we would allow the author to specify multiple
images that could be selected based on conditions such as desired size, color
depth, and whether the display supports colors vs. grayscale. For example:

(a) If only a single vector image is provided, it will generally work well at
larger sizes but often fails at sizes smaller than it was designed for, as
details become invisible, or the important details become lost as their
distinction from background is reduced. People may want small icons when using
small displays, or displaying content in a small viewport in order to reserve
screen real estate for assistive technology, or when cognitive disabilities
require them to keep a lot of information on the screen at one time rather than
scrolling or overlapping windows. 

(b) An image designed for millions of colors may likewise prove unusable on a
monochrome or grayscale display, when color depth is reduced to improve
performance when using remote access tools over relatively slow connections, or
or when the user has reduced the color depth to compensate for a visual
impairment. 

I admit these are not the most important problems in the world, but when
defining a new specification it makes little sense to ignore these issues.

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Received on Monday, 16 January 2012 22:11:41 GMT

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