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Add raw, uncompressed image data output #136

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Lovell Fuller
2014-12-16 15:46:47 +00:00
parent 464fb1726d
commit a190ae6b08
4 changed files with 100 additions and 5 deletions
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README.md
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@@ -392,6 +392,18 @@ Use PNG format for the output image.
Use WebP format for the output image.
#### raw()
_Requires libvips 7.42.0+_
Provide raw, uncompressed uint8 (unsigned char) image data for Buffer and Stream based output.
The number of channels depends on the input image and selected options.
* 1 channel for images converted to `greyscale()`, with each byte representing one pixel.
* 3 channels for colour images without alpha transparency, with bytes ordered \[red, green, blue, red, green, blue, etc.\]).
* 4 channels for colour images with alpha transparency, with bytes ordered \[red, green, blue, alpha, red, green, blue, alpha, etc.\].
#### quality(quality)
The output quality to use for lossy JPEG, WebP and TIFF output formats. The default quality is `80`.