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Explain processor behavior

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Based on:
https://pkg.go.dev/github.com/disintegration/imaging
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Michael Stingl
2023-12-04 17:28:54 +01:00
parent a87eeda1cd
commit 478960455f
1 changed files with 4 additions and 4 deletions
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services/thumbnails/README.md
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@@ -69,10 +69,10 @@ Returned: 15x10
Normally, an image might get cropped when creating a preview, depending on the aspect ratio of the original image. This can have negative
impacts on previews as only a part of the image will be shown. When using an _optional_ processor in the request, cropping can be avoided by defining on how the preview image generation will be done. The following processors are available:
* `resize`
* `fit`
* `fill`
* `thumbnail`
* `resize` resizes the image to the specified width and height and returns the transformed image. If one of width or height is 0, the image aspect ratio is preserved.
* `fit` scales down the image to fit the specified maximum width and height and returns the transformed image.
* `fill`: creates an image with the specified dimensions and fills it with the scaled source image. To achieve the correct aspect ratio without stretching, the source image will be cropped.
* `thumbnail` scales the image up or down, crops it to the specified width and hight and returns the transformed image.
To apply one of those, a query parameter has to be added to the request, like `?processor=fit`. If no query parameter or processor is added, the default behaviour applies which is `resize` for gif's and `thumbnail` for all others.