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Add warning about possible concurrent tile race #1151

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Lovell Fuller 2018-05-25 19:53:23 +01:00
parent 54a71fc142
commit ddc23493d4
2 changed files with 4 additions and 0 deletions
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docs/api-output.md
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@ -279,6 +279,8 @@ Use tile-based deep zoom (image pyramid) output.
Set the format and options for tile images via the `toFormat`, `jpeg`, `png` or `webp` functions.
Use a `.zip` or `.szi` file extension with `toFile` to write to a compressed archive file format.
Warning: multiple sharp instances concurrently producing tile output can expose a possible race condition in some versions of libgsf.
**Parameters**
- `tile` **[Object][15]?**

2
lib/output.js
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@ -390,6 +390,8 @@ function toFormat (format, options) {
* Set the format and options for tile images via the `toFormat`, `jpeg`, `png` or `webp` functions.
* Use a `.zip` or `.szi` file extension with `toFile` to write to a compressed archive file format.
*
* Warning: multiple sharp instances concurrently producing tile output can expose a possible race condition in some versions of libgsf.
*
* @example
* sharp('input.tiff')
* .png()