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b36237ddcb
Uses the recommended rules apart from complexity/useArrowFunction, which would affect about 1700 lines of code with little benefit right now. This is something that can be addressed over time.
86 lines
2.7 KiB
JavaScript
86 lines
2.7 KiB
JavaScript
// Copyright 2013 Lovell Fuller and others.
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// SPDX-License-Identifier: Apache-2.0
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const assert = require('node:assert');
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const sharp = require('../../');
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const fixtures = require('../fixtures');
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describe('Gamma correction', function () {
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it('value of 0.0 (disabled)', function (done) {
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sharp(fixtures.inputJpgWithGammaHoliness)
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.resize(129, 111)
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.toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(129, info.width);
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assert.strictEqual(111, info.height);
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fixtures.assertSimilar(fixtures.expected('gamma-0.0.jpg'), data, { threshold: 9 }, done);
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});
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});
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it('value of 2.2 (default)', function (done) {
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sharp(fixtures.inputJpgWithGammaHoliness)
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.resize(129, 111)
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.gamma()
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.toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(129, info.width);
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assert.strictEqual(111, info.height);
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fixtures.assertSimilar(fixtures.expected('gamma-2.2.jpg'), data, done);
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});
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});
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it('value of 3.0', function (done) {
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sharp(fixtures.inputJpgWithGammaHoliness)
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.resize(129, 111)
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.gamma(3)
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.toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(129, info.width);
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assert.strictEqual(111, info.height);
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fixtures.assertSimilar(fixtures.expected('gamma-3.0.jpg'), data, { threshold: 6 }, done);
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});
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});
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it('input value of 2.2, output value of 3.0', function (done) {
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sharp(fixtures.inputJpgWithGammaHoliness)
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.resize(129, 111)
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.gamma(2.2, 3.0)
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.toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(129, info.width);
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assert.strictEqual(111, info.height);
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fixtures.assertSimilar(fixtures.expected('gamma-in-2.2-out-3.0.jpg'), data, { threshold: 6 }, done);
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});
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});
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it('alpha transparency', function (done) {
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sharp(fixtures.inputPngOverlayLayer1)
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.resize(320)
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.gamma()
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.jpeg()
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.toBuffer(function (err, data, info) {
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if (err) throw err;
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assert.strictEqual('jpeg', info.format);
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assert.strictEqual(320, info.width);
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fixtures.assertSimilar(fixtures.expected('gamma-alpha.jpg'), data, done);
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});
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});
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it('invalid first parameter value', function () {
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assert.throws(function () {
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sharp(fixtures.inputJpgWithGammaHoliness).gamma(4);
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});
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});
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it('invalid second parameter value', function () {
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assert.throws(function () {
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sharp(fixtures.inputJpgWithGammaHoliness).gamma(2.2, 4);
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});
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});
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});
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