Underline text rendered with drawPosText

[Bear Travis]

Hi All,

I was wondering what the recommended method was of decorating text with an underline when it is rendered with SkCanvas::drawPosText (specifically the drawPosTextH variant). My experiments so far with SkPaint::setUnderlineText haven't worked yet, and I've run across a couple discussions (a code review and a separate issue) that seemed to suggest that setUnderlineText was not the right API to use, and that some custom work might be involved.

Any help would be much appreciated,

-Bear

[Ben Wagner]

In Skia the text decorations (underline and strike-through) only affect drawText calls, and this is done mostly just for backward compatibility and will probably be removed soon. Text decoration can get quite complex with layout, and since different users will disagree about what the behavior should be it's best that the user do the drawing.

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[Cary Clark]

What Ben said.

You can get the metrics for drawPosText underlining from Skia. See fancyposunderline in gm/texteffects.cpp for an example.

[Bear Travis]

Thanks for the help guys, this is just what I was looking for.

-Bear

On Wednesday, February 15, 2017 at 11:30:02 AM UTC-8, Cary Clark wrote:

What Ben said.

You can get the metrics for drawPosText underlining from Skia. See fancyposunderline in gm/texteffects.cpp for an example.

On Wed, Feb 15, 2017 at 2:26 PM, 'Ben Wagner' via skia-discuss <skia-d...@googlegroups.com> wrote:

In Skia the text decorations (underline and strike-through) only affect drawText calls, and this is done mostly just for backward compatibility and will probably be removed soon. Text decoration can get quite complex with layout, and since different users will disagree about what the behavior should be it's best that the user do the drawing.

On Wed, Feb 15, 2017 at 2:14 PM, Bear Travis <bear....@gmail.com> wrote:

Hi All,

I was wondering what the recommended method was of decorating text with an underline when it is rendered with SkCanvas::drawPosText (specifically the drawPosTextH variant). My experiments so far with SkPaint::setUnderlineText haven't worked yet, and I've run across a couple discussions (a code review and a separate issue) that seemed to suggest that setUnderlineText was not the right API to use, and that some custom work might be involved.

Any help would be much appreciated,

-Bear

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