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hugo/content/en/news/0.37-relnotes/index.md
Bjørn Erik Pedersen 83bef6955e Squashed 'docs/' changes from 896bad9f4..e161ea09d 
e161ea09d Add one more Chinese file to workaround reflect: Zero(nil)
b595b3a21 Add more Chinese translation
56e4e95d9 Use lang.Merge to "fill in the gaps" for untranslated pages
ef079406c Merge commit '650fac3a4e7d256f4505402ab44cfc3c804b8dea'
650fac3a4 Squashed 'themes/gohugoioTheme/' changes from a1768ebb..f31a3dc8
322eff899 Add Chinese language for menus
d90b886e0 Fix Markdown table syntax in previous commit
737f3dfca Update the leaf bundle vs branch bundle table
09fa1bc4e Clarify that `.Now` is obsolete
879ea3f6a Make release notes somewhat more consistent
0113e2051 Move 0.40.2-relnotes into content/en/news
77578f5bf Move content/ into new contentDir content/en/
4dcf7c709 Fix "reflect: Zero(nil)" error in showcase
63dd25505 Release 0.40.2
2076c0d56 releaser: Prepare repository for 0.41-DEV
070fe565e releaser: Add release notes to /docs for release of 0.40.2
4ce52e913 releaser: Bump versions for release of 0.40.2
41907c487 Fix typos in syntax-highlighting.md
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b77274301 Remove duplicate release notes (0.27, 0.27.1, 0.35)
6e00da316 Remove obsolete content/release-notes/ directory
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4538a6d5b releaser: Prepare repository for 0.41-DEV
91b391d70 releaser: Add release notes to /docs for release of 0.40.1
e0979d143 releaser: Bump versions for release of 0.40.1
7983967c2 Clean images
fe3fdd77d Polish showcase for Flesland Flis
e6dde3989 Showcase - Flesland Flis AS by Absoluttweb
73aa62290 Revive @spf13's special Hugo font
add67b335 Release Hugo 0.40
c0a26e5a6 Merge branch 'temp40'
beeabaaae releaser: Prepare repository for 0.41-DEV
e67d5e985 releaser: Add release notes to /docs for release of 0.40
6cdd95273 releaser: Bump versions for release of 0.40
bee21fb9b Revive the other Hugo logos too
4f45e8fe1 Fix the link type attribute for RSS in examples
8c67dc89a Fix example in delimit doc
e7f6c00d5 Revive the logo used on the forum
82b0cd26e Merge commit 'a215abf70e018f4bf40d6c09d8bd148d8684b33d'
119c8ca58 Merge commit 'd2ec1a06df8ab6b17ad05cb008d5701b40327d47'
db4683bd2 Improve .Get docs
05260b886 .Get function: fix syntax signature

git-subtree-dir: docs
git-subtree-split: e161ea09d33e3199f4998e4d2e9068d5a850f042
2018-05-04 09:44:21 +02:00

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---
date: 2018-02-27
title: "Hugo 0.37: Preserve PNG Colour Palette"
description: "Reduces processed PNG file sizes. And 0.37 is built with Go 1.10!"
categories: ["Releases"]
---
The main item in Hugo `0.37` is that we now properly preserve the colour palette when processing `PNG` images. We got reports from users experiencing their `PNG` images getting bigger in file size when scaled down. Now, if you, as an example, start out with a carefully chosen 8 bit colour palette (i.e. `PNG-8`), this is now what you will end up with. A special thanks to [@aitva](https://github.com/aitva) for doing the investigative work finding a proper fix for this issue.
This release represents **40 contributions by 5 contributors** to the main Hugo code base.
[@bep](https://github.com/bep) leads the Hugo development with a significant amount of contributions, but also a big shoutout to [@vassudanagunta](https://github.com/vassudanagunta), [@kaushalmodi](https://github.com/kaushalmodi), and [@curttimson](https://github.com/curttimson) for their ongoing contributions.
And as always a big thanks to [@digitalcraftsman](https://github.com/digitalcraftsman) for his relentless work on keeping the documentation and the themes site in pristine condition.
Many have also been busy writing and fixing the documentation in [hugoDocs](https://github.com/gohugoio/hugoDocs),
which has received **24 contributions by 8 contributors**. A special thanks to [@bep](https://github.com/bep), [@4RU](https://github.com/4RU), [@kaushalmodi](https://github.com/kaushalmodi), and [@mitchchn](https://github.com/mitchchn) for their work on the documentation site.
Hugo now has:
* 23649+ [stars](https://github.com/gohugoio/hugo/stargazers)
* 447+ [contributors](https://github.com/gohugoio/hugo/graphs/contributors)
* 197+ [themes](http://themes.gohugo.io/)
## Notes
* Hugo will now convert non-string `YAML` map keys to string. See [#4393](https://github.com/gohugoio/hugo/issues/4393) for more information. You will get a `WARNING` in the console if you are touched by this.
* We have improved the `PNG` processing, and have incremented the version numbers on the URL for the processed `PNG` image. This will just work, but you may want to run `hugo --gc` to clean up some old stale images in the resource cache.
## Enhancements
### Templates
* Add template func for TOML/JSON/YAML docs examples conversion. This is mainly motivated by the needs of the Hugo docs site. [d382502d](https://github.com/gohugoio/hugo/commit/d382502d6dfa1c066545e215ba83e2e0a9d2c8d7) [@bep](https://github.com/bep) [#4389](https://github.com/gohugoio/hugo/issues/4389)
### Core
* Refactor tests for JSON, YAML and TOML equivalency, add coverage [82eefded](https://github.com/gohugoio/hugo/commit/82eefded1353f0198fd8fe9f7df1aa620d3d50eb) [@vassudanagunta](https://github.com/vassudanagunta)
* Re-enable YAML data tests disabled in f554503f [e1728349](https://github.com/gohugoio/hugo/commit/e1728349930e2cc1b6580766473de98adb0f3e50) [@vassudanagunta](https://github.com/vassudanagunta)
### Other
* Preserve color palette for PNG images [799c654b](https://github.com/gohugoio/hugo/commit/799c654b0d39ec869c2da24d41de3636eb7157f0) [@bep](https://github.com/bep) [#4416](https://github.com/gohugoio/hugo/issues/4416)
* Use `Floyd-Steinberg` dithering for PNGs [13ea1e7c](https://github.com/gohugoio/hugo/commit/13ea1e7c352852966f88ef119d9434bbb1ee62fa) [@bep](https://github.com/bep) [#4453](https://github.com/gohugoio/hugo/issues/4453)
* Make `ge`, `le` etc. work with the Hugo Version number [0602135f](https://github.com/gohugoio/hugo/commit/0602135fd44b0cfa0a51b0ec6e451ae58ac95666) [@bep](https://github.com/bep) [#4443](https://github.com/gohugoio/hugo/issues/4443)
* Update dependencies [eaf573a2](https://github.com/gohugoio/hugo/commit/eaf573a2778e79287b871b69f4959fd3082d8887) [@bep](https://github.com/bep) [#4418](https://github.com/gohugoio/hugo/issues/4418)
* Update to Go 1.10 (!) Take 2 [a3f26e56](https://github.com/gohugoio/hugo/commit/a3f26e56368c62b0900a10d83a11b7783630963b) [@bep](https://github.com/bep)
* Update to Go 1.10 (!) [ff10c15a](https://github.com/gohugoio/hugo/commit/ff10c15a93632043f7a7f6551a30487c9ef58c50) [@bep](https://github.com/bep)
* Add WARNING for integer YAML keys [0816a97a](https://github.com/gohugoio/hugo/commit/0816a97a469f11d8e9706143975eaa532e29639b) [@bep](https://github.com/bep) [#4393](https://github.com/gohugoio/hugo/issues/4393)
* Tune stringifyMapKeys [10a917df](https://github.com/gohugoio/hugo/commit/10a917dfdce8851666c5b89ebc02af6f6c84ab59) [@bep](https://github.com/bep)
* Rename stringifyYAMLMapKeys to stringifyMapKeys [d4beef0d](https://github.com/gohugoio/hugo/commit/d4beef0d2bb8f6481fa80e1d938454a7d4e38814) [@bep](https://github.com/bep)
* Add benchmarks for stringifyYAMLMapKeys [51213e0b](https://github.com/gohugoio/hugo/commit/51213e0be19fc19dbca9815afa95c73bd6d159c2) [@bep](https://github.com/bep)
* Add support for `YAML` array data files [1fa24177](https://github.com/gohugoio/hugo/commit/1fa2417777d82b81bf37919ad02de4f5dcbf0d50) [@vassudanagunta](https://github.com/vassudanagunta) [#3890](https://github.com/gohugoio/hugo/issues/3890)
* Account for array type data in data dir merge/override logic [bb549a0d](https://github.com/gohugoio/hugo/commit/bb549a0d57505a6b8f28930bb91a9ab44cbb3288) [@vassudanagunta](https://github.com/vassudanagunta) [#4366](https://github.com/gohugoio/hugo/issues/4366)
* Add "target" and "rel" parameters to figure shortcode [2e95ec68](https://github.com/gohugoio/hugo/commit/2e95ec6844bf65a25485bdc8e2638e45788f2dcf) [@kaushalmodi](https://github.com/kaushalmodi)
* image" property, not "twitter:image:src" [76d38d5e](https://github.com/gohugoio/hugo/commit/76d38d5e5322fc6220fb9e74f9ca0668606ebb5d) [@kaushalmodi](https://github.com/kaushalmodi)
## Fixes
### Core
* Continue `GitInfo` lookup on error [e9750d83](https://github.com/gohugoio/hugo/commit/e9750d831f749afa928d8a099af5889d18cb2484) [@bep](https://github.com/bep)
* Fix paginator `URL` for sections with URL in front matter [9f740b37](https://github.com/gohugoio/hugo/commit/9f740b37cfb3278e34a5d085380ccd4d619dabff) [@bep](https://github.com/bep) [#4415](https://github.com/gohugoio/hugo/issues/4415)
### Other
* Fix bug in Site.assembleSections method [00868081](https://github.com/gohugoio/hugo/commit/00868081f624928d773a7b698654766f8cd70069) [@vassudanagunta](https://github.com/vassudanagunta) [#4447](https://github.com/gohugoio/hugo/issues/4447)
* Update Blackfriday to fix footnote HTML5 validation error [492fea7c](https://github.com/gohugoio/hugo/commit/492fea7cd2bfcbdfe9f56aa0ae659cf62648833b) [@bep](https://github.com/bep) [#4433](https://github.com/gohugoio/hugo/issues/4433)
* Fix `YAML` maps key type [16a5c745](https://github.com/gohugoio/hugo/commit/16a5c74519771138023f019fe535fa5b250dc50d) [@dmgawel](https://github.com/dmgawel) [#2441](https://github.com/gohugoio/hugo/issues/2441)
* Remove `ERROR` on missing baseURL [55bd46a6](https://github.com/gohugoio/hugo/commit/55bd46a633d68f62e131457631ba839d6f876a55) [@bep](https://github.com/bep) [#4397](https://github.com/gohugoio/hugo/issues/4397)
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