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Mobile/Fennec/Android/png optimisation: Difference between revisions
Mobile/Fennec/Android/png optimisation (view source)
Revision as of 15:37, 3 March 2017
, 3 March 2017Added webp Android Studio link
(Created page with "* If possible, use a VectorDrawable (SVG can be converted to VectorDrawable) ** '''DO NOT USE VectorDrawable FOR IMAGES > 200DP''' - this is likely to result in performance is...") |
(Added webp Android Studio link) |
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* Consider converting to webp - this can result in significant size savings | * Consider converting to webp - this can result in significant size savings | ||
** '''Do not use webp for images containing transparency''': those are only supported on Android >= 4.3 (support was introduced with 4.2.1, but 4.2.0 isn't supported [https://developer.android.com/guide/appendix/media-formats.html]). | ** The information below is obsolete - you can just use Android 4.3 or newer: https://developer.android.com/studio/write/convert-webp.html | ||
** '''Verify each image manually''', webp conversion can result in a loss of fidelity - edge artifacts are a particular issue with webp, and seem to affect computer generated images the most. | ** <s>'''Do not use webp for images containing transparency''': those are only supported on Android >= 4.3 (support was introduced with 4.2.1, but 4.2.0 isn't supported [https://developer.android.com/guide/appendix/media-formats.html]).</s> | ||
** <s>'''Verify each image manually''', webp conversion can result in a loss of fidelity - edge artifacts are a particular issue with webp, and seem to affect computer generated images the most.</s> | |||
find . -name foxfinder.png -exec bash -c 'cwebp {} —c 90 -o ${x%.png}.webp' \; | find . -name foxfinder.png -exec bash -c 'cwebp {} —c 90 -o ${x%.png}.webp' \; | ||
* If webp conversion looks satisfactory, delete the png files, and clobber - both gradle and mach builds will trip up otherwise. Feel free to adjust the quality factor (-q 90) above until the images look acceptable. | * <s>If webp conversion looks satisfactory, delete the png files, and clobber - both gradle and mach builds will trip up otherwise. Feel free to adjust the quality factor (-q 90) above until the images look acceptable.</s> | ||
== Example numbers == | == Example numbers == | ||