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Docs: cross-link removeAlpha and flatten

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Lovell Fuller 2021-05-23 18:46:23 +01:00
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commit 1b4d1521e0
5 changed files with 39 additions and 29 deletions
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34
docs/api-channel.md
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@ -4,6 +4,8 @@
Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel. Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.
See also [flatten][1].
### Examples ### Examples
```javascript ```javascript
@ -25,7 +27,7 @@ This is a no-op if the image already has an alpha channel.
### Parameters ### Parameters
* `alpha` **[number][1]** alpha transparency level (0=fully-transparent, 1=fully-opaque) (optional, default `1`) * `alpha` **[number][2]** alpha transparency level (0=fully-transparent, 1=fully-opaque) (optional, default `1`)
### Examples ### Examples
@ -43,7 +45,7 @@ const rgba = await sharp(rgb)
.toBuffer(); .toBuffer();
``` ```
* Throws **[Error][2]** Invalid alpha transparency level * Throws **[Error][3]** Invalid alpha transparency level
Returns **Sharp** Returns **Sharp**
@ -57,7 +59,7 @@ Extract a single channel from a multi-channel image.
### Parameters ### Parameters
* `channel` **([number][1] | [string][3])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`. * `channel` **([number][2] | [string][4])** zero-indexed channel/band number to extract, or `red`, `green`, `blue` or `alpha`.
### Examples ### Examples
@ -71,7 +73,7 @@ sharp(input)
}); });
``` ```
* Throws **[Error][2]** Invalid channel * Throws **[Error][3]** Invalid channel
Returns **Sharp** Returns **Sharp**
@ -90,12 +92,12 @@ For raw pixel input, the `options` object should contain a `raw` attribute, whic
### Parameters ### Parameters
* `images` **([Array][4]<([string][3] | [Buffer][5])> | [string][3] | [Buffer][5])** one or more images (file paths, Buffers). * `images` **([Array][5]<([string][4] | [Buffer][6])> | [string][4] | [Buffer][6])** one or more images (file paths, Buffers).
* `options` **[Object][6]** image options, see `sharp()` constructor. * `options` **[Object][7]** image options, see `sharp()` constructor.
<!----> <!---->
* Throws **[Error][2]** Invalid parameters * Throws **[Error][3]** Invalid parameters
Returns **Sharp** Returns **Sharp**
@ -105,7 +107,7 @@ Perform a bitwise boolean operation on all input image channels (bands) to produ
### Parameters ### Parameters
* `boolOp` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively. * `boolOp` **[string][4]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
### Examples ### Examples
@ -119,18 +121,20 @@ sharp('3-channel-rgb-input.png')
}); });
``` ```
* Throws **[Error][2]** Invalid parameters * Throws **[Error][3]** Invalid parameters
Returns **Sharp** Returns **Sharp**
[1]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number [1]: /api-operation#flatten
[2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error [2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number
[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String [3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
[4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array [4]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String
[5]: https://nodejs.org/api/buffer.html [5]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
[6]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object [6]: https://nodejs.org/api/buffer.html
[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object

17
docs/api-operation.md
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@ -176,6 +176,8 @@ Returns **Sharp**
Merge alpha transparency channel, if any, with a background, then remove the alpha channel. Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
See also [removeAlpha][8].
### Parameters ### Parameters
* `options` **[Object][2]?** * `options` **[Object][2]?**
@ -245,11 +247,10 @@ Returns **Sharp**
## clahe ## clahe
Perform contrast limiting adaptive histogram equalization (CLAHE) Perform contrast limiting adaptive histogram equalization
({@link [https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE|CLAHE}][9]).
This will, in general, enhance the clarity of the image by bringing out This will, in general, enhance the clarity of the image by bringing out darker details.
darker details. Please read more about CLAHE here:
[https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE][8]
### Parameters ### Parameters
@ -332,7 +333,7 @@ the selected bitwise boolean `operation` between the corresponding pixels of the
### Parameters ### Parameters
* `operand` **([Buffer][9] | [string][3])** Buffer containing image data or string containing the path to an image file. * `operand` **([Buffer][10] | [string][3])** Buffer containing image data or string containing the path to an image file.
* `operator` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively. * `operator` **[string][3]** one of `and`, `or` or `eor` to perform that bitwise operation, like the C logic operators `&`, `|` and `^` respectively.
* `options` **[Object][2]?** * `options` **[Object][2]?**
@ -449,6 +450,8 @@ Returns **Sharp**
[7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array [7]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array
[8]: https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE [8]: /api-channel#removealpha
[9]: https://nodejs.org/api/buffer.html [9]: https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE|CLAHE}
[10]: https://nodejs.org/api/buffer.html

2
docs/search-index.json
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2
lib/channel.js
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@ -15,6 +15,8 @@ const bool = {
/** /**
* Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel. * Remove alpha channel, if any. This is a no-op if the image does not have an alpha channel.
* *
* See also {@link /api-operation#flatten|flatten}.
*
* @example * @example
* sharp('rgba.png') * sharp('rgba.png')
* .removeAlpha() * .removeAlpha()

9
lib/operation.js
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@ -270,6 +270,8 @@ function blur (sigma) {
/** /**
* Merge alpha transparency channel, if any, with a background, then remove the alpha channel. * Merge alpha transparency channel, if any, with a background, then remove the alpha channel.
* *
* See also {@link /api-channel#removealpha|removeAlpha}.
*
* @example * @example
* await sharp(rgbaInput) * await sharp(rgbaInput)
* .flatten({ background: '#F0A703' }) * .flatten({ background: '#F0A703' })
@ -351,11 +353,10 @@ function normalize (normalize) {
} }
/** /**
* Perform contrast limiting adaptive histogram equalization (CLAHE) * Perform contrast limiting adaptive histogram equalization
* ({@link https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE|CLAHE}).
* *
* This will, in general, enhance the clarity of the image by bringing out * This will, in general, enhance the clarity of the image by bringing out darker details.
* darker details. Please read more about CLAHE here:
* https://en.wikipedia.org/wiki/Adaptive_histogram_equalization#Contrast_Limited_AHE
* *
* @since 0.28.3 * @since 0.28.3
* *