mirror of
https://github.com/lovell/sharp.git
synced 2025-07-09 18:40:16 +02:00
80 lines
2.2 KiB
Markdown
80 lines
2.2 KiB
Markdown
<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
|
|
|
|
## tint
|
|
|
|
Tint the image using the provided chroma while preserving the image luminance.
|
|
An alpha channel may be present and will be unchanged by the operation.
|
|
|
|
### Parameters
|
|
|
|
- `rgb` **([string][1] \| [Object][2])** parsed by the [color][3] module to extract chroma values.
|
|
|
|
|
|
- Throws **[Error][4]** Invalid parameter
|
|
|
|
Returns **Sharp**
|
|
|
|
## greyscale
|
|
|
|
Convert to 8-bit greyscale; 256 shades of grey.
|
|
This is a linear operation. If the input image is in a non-linear colour space such as sRGB, use `gamma()` with `greyscale()` for the best results.
|
|
By default the output image will be web-friendly sRGB and contain three (identical) color channels.
|
|
This may be overridden by other sharp operations such as `toColourspace('b-w')`,
|
|
which will produce an output image containing one color channel.
|
|
An alpha channel may be present, and will be unchanged by the operation.
|
|
|
|
### Parameters
|
|
|
|
- `greyscale` **[Boolean][5]** (optional, default `true`)
|
|
|
|
Returns **Sharp**
|
|
|
|
## grayscale
|
|
|
|
Alternative spelling of `greyscale`.
|
|
|
|
### Parameters
|
|
|
|
- `grayscale` **[Boolean][5]** (optional, default `true`)
|
|
|
|
Returns **Sharp**
|
|
|
|
## toColourspace
|
|
|
|
Set the output colourspace.
|
|
By default output image will be web-friendly sRGB, with additional channels interpreted as alpha channels.
|
|
|
|
### Parameters
|
|
|
|
- `colourspace` **[string][1]?** output colourspace e.g. `srgb`, `rgb`, `cmyk`, `lab`, `b-w` [...][6]
|
|
|
|
|
|
- Throws **[Error][4]** Invalid parameters
|
|
|
|
Returns **Sharp**
|
|
|
|
## toColorspace
|
|
|
|
Alternative spelling of `toColourspace`.
|
|
|
|
### Parameters
|
|
|
|
- `colorspace` **[string][1]?** output colorspace.
|
|
|
|
|
|
- Throws **[Error][4]** Invalid parameters
|
|
|
|
Returns **Sharp**
|
|
|
|
[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
|
|
|
|
[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object
|
|
|
|
[3]: https://www.npmjs.org/package/color
|
|
|
|
[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
|
|
|
|
[5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Boolean
|
|
|
|
[6]: https://github.com/libvips/libvips/blob/master/libvips/iofuncs/enumtypes.c#L568
|