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Expose mozjpeg quant_table flag (#1285)

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Espen Hovlandsdal
2018-07-10 16:56:05 +02:00
committed by Lovell Fuller
parent 5cb35485f1
commit 7bbc5176a1
6 changed files with 62 additions and 0 deletions
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docs/api-output.md
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@@ -116,6 +116,8 @@ Use these JPEG options for output image.
- `options.progressive` **[Boolean][6]** use progressive (interlace) scan (optional, default `false`)
- `options.chromaSubsampling` **[String][1]** set to '4:4:4' to prevent chroma subsampling when quality <= 90 (optional, default `'4:2:0'`)
- `options.trellisQuantisation` **[Boolean][6]** apply trellis quantisation, requires mozjpeg (optional, default `false`)
- `options.quantisationTable` **[Number][8]** [quantisation table][9] to use, integer 0-8 (optional, default `0`)
- `options.quantizationTable` **[Number][8]** alternative spelling of quantisationTable (optional, default `0`)
- `options.overshootDeringing` **[Boolean][6]** apply overshoot deringing, requires mozjpeg (optional, default `false`)
- `options.optimiseScans` **[Boolean][6]** optimise progressive scans, forces progressive, requires mozjpeg (optional, default `false`)
- `options.optimizeScans` **[Boolean][6]** alternative spelling of optimiseScans (optional, default `false`)
@@ -312,3 +314,5 @@ Returns **Sharp**
[7]: https://nodejs.org/api/buffer.html
[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
[9]: https://jcupitt.github.io/libvips/API/current/VipsForeignSave.html#vips-jpegsave