To sort an image's colors from darkest to lightest, you can then do:
```handlebars
{{ {{ $colorsByLuminance := sort $image.Colors "Luminance" }}
```
This uses the formula defined here: https://www.w3.org/TR/WCAG21/#dfn-relative-luminanceFixes#10450
Which supports all the existing actions: resize, crop, fit, fill.
But it also allows plain format conversions:
```
{{ $img = $img.Process "webp" }}
```
Which will be a simple re-encoding of the source image.
Fixes#11483
Primary motivation is documentation, but it will also hopefully simplify the code.
Also,
* Lower case the default output format names; this is in line with the custom ones (map keys) and how
it's treated all the places. This avoids doing `stringds.EqualFold` everywhere.
Closes#10896Closes#10620
Note that this is backed by a LRU cache (which we soon shall see more usage of), so if you're a heavy user of cached partials it may be evicted and
refreshed if needed. But in most cases every partial is only invoked once.
This commit also adds a timeout (the global `timeout` config option) to make infinite recursion in partials
easier to reason about.
```
name old time/op new time/op delta
IncludeCached-10 8.92ms ± 0% 8.48ms ± 1% -4.87% (p=0.016 n=4+5)
name old alloc/op new alloc/op delta
IncludeCached-10 6.65MB ± 0% 5.17MB ± 0% -22.32% (p=0.002 n=6+6)
name old allocs/op new allocs/op delta
IncludeCached-10 117k ± 0% 71k ± 0% -39.44% (p=0.002 n=6+6)
```
Closes#4086
Updates #9588
* Add file context to minifier errors when publishing
* Misc fixes (see issues)
* Allow custom server error template in layouts/server/error.html
To get to this, this commit also cleans up and simplifies the code surrounding errors and files. This also removes the usage of `github.com/pkg/errors`, mostly because of https://github.com/pkg/errors/issues/223 -- but also because most of this is now built-in to Go.
Fixes#9852Fixes#9857Fixes#9863
Introduces the Crop method for image processing which implements gift.CropToSize. Also allows a smartCrop without resizing, and updates the documentation.
Fixes#9499
This is a security hardening measure; don't trust the URL extension or any `Content-Type`/`Content-Disposition` header on its own, always look at the file content using Go's `http.DetectContentType`.
This commit also adds ttf and otf media type definitions to Hugo.
Fixes#9302Fixes#9301
Keep this as a separate commit as this isn't because the files have changed. The filenames have changed due to cache busting of PNG and Webp images.
See #8729
The image format is defined as the image extension of the known formats,
excluding the dot.
All of 'img.Resize "600x jpeg"', 'img.Resize "600x jpg"',
and 'img.Resize "600x png"' are valid format definitions.
If the target format is defined in the operation definition string,
then the converted image will be stored in this format. Permalinks and
media type are updated correspondingly.
Unknown image extensions in the operation definition have not effect.
See #6298
This commit pulls most of the image related logic into its own package, to make it easier to reason about and extend.
This is also a rewrite of the transformation logic used in Hugo Pipes, mostly to allow constructs like the one below:
{{ ($myimg | fingerprint ).Width }}
Fixes#5903Fixes#6234Fixes#6266
