sharp/test/unit/colourspace.js

'use strict';

var assert = require('assert');

var sharp = require('../../index');
var fixtures = require('../fixtures');

sharp.cache(0);

describe('Colour space conversion', function() {

  it('To greyscale', function(done) {
    sharp(fixtures.inputJpg)
      .resize(320, 240)
      .greyscale()
      .toFile(fixtures.path('output.greyscale-gamma-0.0.jpg'), done);
  });

  it('To greyscale with gamma correction', function(done) {
    sharp(fixtures.inputJpg)
      .resize(320, 240)
      .gamma()
      .greyscale()
      .toFile(fixtures.path('output.greyscale-gamma-2.2.jpg'), done);
  });

  it('Not to greyscale', function(done) {
    sharp(fixtures.inputJpg)
      .resize(320, 240)
      .greyscale(false)
      .toFile(fixtures.path('output.greyscale-not.jpg'), done);
  });

  it('From 1-bit TIFF to sRGB WebP [slow]', function(done) {
    sharp(fixtures.inputTiff)
      .webp()
      .toBuffer(function(err, data, info) {
        if (err) throw err;
        assert.strictEqual(true, data.length > 0);
        assert.strictEqual('webp', info.format);
        done();
      });
  });

  it('From CMYK to sRGB', function(done) {
    sharp(fixtures.inputJpgWithCmykProfile)
      .resize(320)
      .toBuffer(function(err, data, info) {
        if (err) throw err;
        assert.strictEqual(true, data.length > 0);
        assert.strictEqual('jpeg', info.format);
        assert.strictEqual(320, info.width);
        done();
      });
  });

  it('From CMYK to sRGB with white background, not yellow', function(done) {
    sharp(fixtures.inputJpgWithCmykProfile)
      .resize(320, 240)
      .background('white')
      .embed()
      .toFile(fixtures.path('output.cmyk2srgb.jpg'), function(err, info) {
        if (err) throw err;
        assert.strictEqual('jpeg', info.format);
        assert.strictEqual(320, info.width);
        assert.strictEqual(240, info.height);
        done();
      });
  });

  it('From profile-less CMYK to sRGB', function(done) {
    sharp(fixtures.inputJpgWithCmykNoProfile)
      .resize(320)
      .toBuffer(function(err, data, info) {
        if (err) throw err;
        assert.strictEqual(true, data.length > 0);
        assert.strictEqual('jpeg', info.format);
        assert.strictEqual(320, info.width);
        done();
      });
  });

});