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README.md

@jimp/plugin-resize

Resize an image.

Resizes the image to a set width and height using a 2-pass bilinear algorithm/

Usage

  • @param {number} w the width to resize the image to (or Jimp.AUTO)
  • @param {number} h the height to resize the image to (or Jimp.AUTO)
  • @param {string} mode (optional) a scaling method (e.g. Jimp.RESIZE_BEZIER)
  • @param {function(Error, Jimp)} cb (optional) a callback for when complete

    import jimp from 'jimp';
    
    async function main() {
    	// Read the image.
    	const image = await jimp.read('test/image.png');
    
    	// Resize the image to width 150 and auto height.
    	await image.resize(150, jimp.AUTO);
    
    	// Save and overwrite the image
    	await image.writeAsync('test/image.png');
    }
    
    main();
    

Auto

Jimp.AUTO can be passes to either the height or width and jimp will scale the image accordingly. Jimp.AUTO cannot be both height and width.

// resize the height to 250 and scale the width accordingly
image.resize(Jimp.AUTO, 250);
// resize the width to 250 and scale the height accordingly
image.resize(250, Jimp.AUTO);

Resize modes

The default resizing algorithm uses a bilinear method.

Optionally, the following constants can be passed to choose a particular resizing algorithm:

Jimp.RESIZE_NEAREST_NEIGHBOR;
Jimp.RESIZE_BILINEAR;
Jimp.RESIZE_BICUBIC;
Jimp.RESIZE_HERMITE;
Jimp.RESIZE_BEZIER;
image.resize(250, 250, Jimp.RESIZE_BEZIER);