inner shadow for rounded rect with stroke

[Igor Khromov]

I'm trying to draw rounded rectangle with stroke and inner shadow (like input fields have), but no success.

Can anybody tell me how to do that? Or just describe the algorithm.

Example: (shadow has blur, outer pixels transparent)

Thanks for help!

[Shawn Riordan]

There are probably better ways to do it, but here is my attempt at it:

https://fiddle.skia.org/c/0cac3426f37741a891787b989dad6415

[Shawn Riordan]

Cleaned up a little bit

https://fiddle.skia.org/c/a09da324e79af60c897914458c229d25

On Saturday, June 18, 2016 at 4:12:00 AM UTC-7, Igor Khromov wrote:

[Shawn Riordan]

Ok, final draft.  

https://fiddle.skia.org/c/0e07c3305b200068e9dffb2c1fafa7ef

(I need to find another hobby)

On Saturday, June 18, 2016 at 4:12:00 AM UTC-7, Igor Khromov wrote:

[Igor Khromov]

Thanks a lot!!!

Just one more question, how canvas->save() and canvas->restore() works?

Can't find that in docs on skia.org.

суббота, 18 июня 2016 г., 21:41:27 UTC+3 пользователь Shawn Riordan написал:

[Shawn Riordan]

The documentation on skia.org is mostly for demonstration.

The full documenation is on this site:

http://chromium-skia-gm.commondatastorage.googleapis.com/doxygen/doxygen/html/classSkCanvas.html#ac98147dc771b47c7353a51e7c171e428

The code in drawFieldBackground() applied a clip region and a change to the matrix (that call to transform()).

I wanted to be able to undo those changes, once I was done.  So I did a save() before I did them, then a restore() after I no longer wanted those changes.

You can read about them on that site I linked.

[Igor Khromov]

Thanks for your time, I really appreciate your help!!!!

воскресенье, 19 июня 2016 г., 19:17:47 UTC+3 пользователь Shawn Riordan написал: