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Expose WebP alpha quality, lossless and near-lossless output options (#685)

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This commit is contained in:
Rahul Nanwani
2017-01-19 19:15:32 +05:30
committed by Lovell Fuller
parent 815d076b35
commit a1b8efe721
9 changed files with 88 additions and 1 deletions
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50
test/unit/io.js
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@@ -372,6 +372,50 @@ describe('Input/output', function () {
done();
});
});
it('should work for webp alpha quality', function (done) {
sharp(fixtures.inputPngAlphaPremultiplicationSmall)
.webp({alphaQuality: 80})
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual('webp', info.format);
fixtures.assertSimilar(fixtures.expected('webp-alpha-80.webp'), data, done);
});
});
it('should work for webp lossless', function (done) {
sharp(fixtures.inputPngAlphaPremultiplicationSmall)
.webp({lossless: true})
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual('webp', info.format);
fixtures.assertSimilar(fixtures.expected('webp-lossless.webp'), data, done);
});
});
it('should work for webp near-lossless', function (done) {
sharp(fixtures.inputPngAlphaPremultiplicationSmall)
.webp({nearLossless: true, quality: 50})
.toBuffer(function (err50, data50, info50) {
if (err50) throw err50;
assert.strictEqual(true, data50.length > 0);
assert.strictEqual('webp', info50.format);
fixtures.assertSimilar(fixtures.expected('webp-near-lossless-50.webp'), data50, done);
});
});
it('should use near-lossless when both lossless and nearLossless are specified', function (done) {
sharp(fixtures.inputPngAlphaPremultiplicationSmall)
.webp({nearLossless: true, quality: 50, lossless: true})
.toBuffer(function (err50, data50, info50) {
if (err50) throw err50;
assert.strictEqual(true, data50.length > 0);
assert.strictEqual('webp', info50.format);
fixtures.assertSimilar(fixtures.expected('webp-near-lossless-50.webp'), data50, done);
});
});
}
it('Invalid output format', function (done) {
@@ -735,6 +779,12 @@ describe('Input/output', function () {
});
});
it('Invalid WebP alpha quality throws error', function () {
assert.throws(function () {
sharp().webp({ alphaQuality: 101 });
});
});
it('Invalid TIFF quality throws error', function () {
assert.throws(function () {
sharp().tiff({ quality: 101 });