From 5e21f6ef3d333addaafa24a4d0e9ef366b39587f Mon Sep 17 00:00:00 2001 From: "Patrick H. Lauke" Date: Tue, 29 Oct 2024 14:04:57 +0000 Subject: [PATCH] Add note about the scope of 1.4.5 Images of Text (images used *rather than* text) and example (#4021) Closes: https://github.com/w3c/wcag/issues/3755 This is an alternative to https://github.com/w3c/wcag/pull/3773 following discussions in WCAG 2.x backlog meeting from 9 August meeting. Filed here as a separate clean PR, rather than trying to modify @giacomo-petri's PR --------- Co-authored-by: Mike Gower --- understanding/20/images-of-text.html | 175 ++++++--------------------- 1 file changed, 40 insertions(+), 135 deletions(-) diff --git a/understanding/20/images-of-text.html b/understanding/20/images-of-text.html index ce11a97a41..9096c2bba3 100644 --- a/understanding/20/images-of-text.html +++ b/understanding/20/images-of-text.html @@ -1,34 +1,33 @@ - + Understanding Images of Text

Understanding Images of Text

- +

In brief

Goal
Users can adjust how text is presented.
What to do
Use text instead of pictures of text.
-
Why it's important
People cannot alter how text looks in images.
+
Why it's important
People cannot alter how text looks in images.
- +

Intent of Images of Text

- - +

The intent of this Success Criterion is to encourage authors, who are using technologies which are capable of achieving their desired default visual presentation, to enable people who require a particular visual presentation of text to be able to adjust the text presentation as needed. This includes people who require the text in a particular font size, foreground and background color, font family, line spacing or alignment.

- +

If authors can use text to achieve the same visual effect, they should present the information as text rather than using an image. If for any reason, the author cannot format the text to get the same effect, the effect won't be reliably presented @@ -40,52 +39,43 @@

Intent of Images of Text

widely deployed or which the author doesn't have the right to redistribute, or to ensure that the text would be anti-aliased on all user agents.

- +

Images of text can also be used where it is possible for users to customize the image of text to match their requirements.

- -

The definition of image of text contains the note: Note: This does not include text that is part of a picture that contains significant + +

The definition of images of text contains the note: This does not include text that is part of a picture that contains significant other visual content. Examples of such pictures include graphs, screenshots, and diagrams which visually convey important information through more than just text.

- + +

The Success Criterion is intended to address situations where images of text are used rather than text. Where images of text are used in addition to text to convey the same information, and where both are presented to the user, this Success Criterion is met. This allows authors to convey content using any styling they desire, while also presenting the information in text, which can then be manipulated by users to make it more distinguishable. This is in contrast to 1.4.9 Images of Text (No Exception), which applies to all images of text, regardless of whether or not they are used in addition to text.

+

Techniques for satisfying this Success Criterion are the same as those for Success Criterion 1.4.9, except that they only need to apply if the visual presentation can be achieved with the technologies that the author is using. For Success Criterion 1.4.9, the sufficient techniques would be applied only when the user can customize - the output. -

- -

See also - 1.4.9: Images of Text (No Exception). + the output.

- - + +

See also 1.4.9 Images of Text (No Exception).

+

Benefits of Images of Text

- -
    -
  • People with low vision (who may have trouble reading the text with the authored font family, size and/or color).
    • -
  • People with visual tracking problems (who may have trouble reading the text with the authored line spacing and/or alignment).
    • -
  • People with cognitive disabilities that affect reading.
    • -
-
- +

Examples of Images of Text

-
Styled Headings
Rather than using bitmap images to present headings in a specific font and size, an @@ -130,139 +120,54 @@

Examples of Images of Text

Customizable font settings in images of text
A Web site allows users to specify font settings and all images of text on the site are then provided based on those settings.
+
The text in an image is also provided as text.
+
A user has to upload an event poster image, which includes text, to their website's events + calendar. The site's CMS (content management system) is limited, and won't allow them to create + a custom HTML/CSS/SVG recreation of the poster. However, in addition to the image, they can add + regular text to the calendar entry, so they post both the poster and the text contained in the image. + This text is shown next to the poster image on the site's calendar page.
-
- +

Resources for Images of Text

- - -
- +

Techniques for Images of Text

- -

Sufficient Techniques for Images of Text

- - -
- +

Additional Techniques (Advisory) for Images of Text

- -
-

CSS Techniques

- -
-
- +

Failures for Images of Text

- -
-
-