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Add tint operation to set image chroma

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This commit is contained in:
Rik Heywood
2018-04-11 20:05:48 +01:00
committed by Lovell Fuller
parent bdac5b5807
commit dbac4b9a63
15 changed files with 172 additions and 23 deletions
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test/fixtures/2569067123_aca715a2ee_o.png vendored Normal file
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test/fixtures/expected/tint-alpha.png vendored Normal file
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test/fixtures/expected/tint-sepia.jpg vendored Normal file
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test/fixtures/index.js vendored
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@@ -89,6 +89,7 @@ module.exports = {
inputPngTestJoinChannel: getPath('testJoinChannel.png'),
inputPngTruncated: getPath('truncated.png'), // gm convert 2569067123_aca715a2ee_o.jpg -resize 320x240 saw.png ; head -c 10000 saw.png > truncated.png
inputPngEmbed: getPath('embedgravitybird.png'), // Released to sharp under a CC BY 4.0
inputPngRGBWithAlpha: getPath('2569067123_aca715a2ee_o.png'), // http://www.flickr.com/photos/grizdave/2569067123/ (same as inputJpg)
inputWebP: getPath('4.webp'), // http://www.gstatic.com/webp/gallery/4.webp
inputWebPWithTransparency: getPath('5_webp_a.webp'), // http://www.gstatic.com/webp/gallery3/5_webp_a.webp

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test/unit/tint.js Normal file
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@@ -0,0 +1,63 @@
'use strict';
const assert = require('assert');
const sharp = require('../../');
const fixtures = require('../fixtures');
describe('Tint', function () {
it('tints rgb image red', function (done) {
const output = fixtures.path('output.tint-red.jpg');
sharp(fixtures.inputJpg)
.resize(320, 240)
.tint('#FF0000')
.toFile(output, function (err, info) {
if (err) throw err;
assert.strictEqual(true, info.size > 0);
fixtures.assertMaxColourDistance(output, fixtures.expected('tint-red.jpg'), 10);
done();
});
});
it('tints rgb image with sepia tone', function (done) {
const output = fixtures.path('output.tint-sepia.jpg');
sharp(fixtures.inputJpg)
.resize(320, 240)
.tint('#704214')
.toFile(output, function (err, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
fixtures.assertMaxColourDistance(output, fixtures.expected('tint-sepia.jpg'), 10);
done();
});
});
it('tints rgb image with sepia tone with rgb colour', function (done) {
const output = fixtures.path('output.tint-sepia.jpg');
sharp(fixtures.inputJpg)
.resize(320, 240)
.tint([112, 66, 20])
.toFile(output, function (err, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
fixtures.assertMaxColourDistance(output, fixtures.expected('tint-sepia.jpg'), 10);
done();
});
});
it('tints rgb image with alpha channel', function (done) {
const output = fixtures.path('output.tint-alpha.png');
sharp(fixtures.inputPngRGBWithAlpha)
.resize(320, 240)
.tint('#704214')
.toFile(output, function (err, info) {
if (err) throw err;
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
fixtures.assertMaxColourDistance(output, fixtures.expected('tint-alpha.png'), 10);
done();
});
});
});