Support for shearing of lines and inline elements #2983
Description
Japanese subtitles commonly use shearing of text, as illustrated below.
Not sheared:
Sheared:
Couple of observations:
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while shearing might not be appropriate for books, it is commonly used for subtitles
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shearing is not applied to individual characters, but instead to complete blocks -- each of the digits in 1998 is not sheared individually, and both ruby text and base are sheared as a single block
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the shear angle is author-specified
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it should be possible to shear individual lines as well as groups of lines
CSS Transforms Module Level 1 skewX() and skewY() can be applied to blocks but neither to lines nor inline elements
See tts:shear, tts:lineShear and tts:fontShear at TTML2.