sharp-image-conversion

Image Conversion Utility (sharp-image-conversion)

Sharp wrapper for single image resize, manipulation and format conversion then output to file or buffer.

Installation

npm install --save sharp-image-conversion

Usage

// instantiate (optional resizing will be applied to all output files/buffered data)
const ImageConverter = require('sharp-image-conversion')
const imageConverter = new ImageConverter('./filename.jpg', {
  xLimit: 1920,
  yLimit: 1080,
})

// convert to PNG and output to disk with specified image manipulation params (only the target path is required)
imageConverter.streamCopy(
  './newFilename.png',
  'png',
  {
    compressionLevel: 5,
    quality: 50,
  })

// convert to webP and output to buffer, with no other alterations
imageConverter
  .toBuffer('webp')
  .then(buffer => {
    // do something with the buffered image data
  })
  .catch(error => {
    console.log(error)
  })

API

new Instance(sourceFilePath : String, resizeOption? : Object)

creates an instance and specify the optional resizing parameter object in the format of:

const resizingOptions = {
  xLimit: 1920, // optional
  yLimit: 1080, // optional
}

Instance.streamCopy(targetFilePath : String, targetFormat? : String, outputOptions? : Object)

copy the file specified during instantiation using node.js stream after converting to the optionally specified image format with optionally appied image manipulation parameters

note 1: refer to Sharp docs for supported image formats.

note 2: specified outputOptions are ignored if targetFormat is undefined or null.

// output options are ignored in this case
instance.streamCopy('targetPath', undefined, {
  option_1: blah_1,
  option_2: blah_2,
})

note 3: outputOptions should match the targetFormat according to Sharp docs.

Instance.toBuffer(targetFormat? : String, outputOptions? : Object)

buffer the image data from the file specified during instantiation after converting to the optionally specified image format with optionally appied image manipulation parameters

see notes from Instance.StreamCopy method

License

MIT