Zoomed in image becomes blurry on iOS if 'will-change' is applied

[Oleksandr-Dubiv]

Hi! Nice plugin!

Couple of stuff to notice:

• seems like max\min feature is not in Master branch (still on a separate branch) and seems working
• my main problem now is that after modifications in max\min branch for optimization reasons you gave added elem.style['will-change'] = 'transform';. thought it triggers 3D transformations handled by GPU, unfortunately this also means that Safari is as always sucks... It makes image unusable blurry thus eliminating sense of zooming in. Reason: when 'will-change' is applied browser makes 'screenshot' that is later zoomed in and that not the original hi-res image ;( If I remove this line - everything goes back to sharp but yeah, on slower devices you can notice some freezes when manipulating image. Some other plugins tackle this image by auto-overlaying one more 2d-transformed image (PinchZoom.js) but this also creates irritating blurriness changes even on each pan (not only zoom).

Any ideas how to preserve both 'will-change' and sharpness in more optimal way? Thanks

[anitasv]

Thank you for this, I haven’t checked these across devices which is why it is not merged.