v0.17.0 - 11th December 2016

• Drop support for versions of Node prior to v4.

• Deprecate the following output format “option” functions: quality, progressive, compressionLevel, withoutAdaptiveFiltering, withoutChromaSubsampling, trellisQuantisation, trellisQuantization, overshootDeringing, optimiseScans and optimizeScans. Access to these is now via output format functions, for example quality(n) is now jpeg({quality: n}) and/or webp({quality: n}).

• Autoconvert GIF and SVG input to PNG output if no other format is specified.

• Expose libvips’ “centre” resize option to mimic *magick’s +0.5px convention. #568

• Ensure support for embedded base64 PNG and JPEG images within an SVG. #601 @dynamite-ready

• Ensure premultiply operation occurs before box filter shrink. #605 @CmdrShepardsPie @teroparvinen

• Add support for PNG and WebP tile-based output formats (in addition to JPEG). #622 @ppaskaris

• Allow use of extend with greyscale input. #623 @ppaskaris

• Allow non-RGB input to embed/extend onto background with an alpha channel. #646 @DaGaMs