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Expose libjpeg optimize_coding flag (#1265)

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This commit is contained in:
Tom Lokhorst
2018-06-21 19:12:10 +02:00
committed by Lovell Fuller
parent 873aa6700f
commit 76c41eaf05
5 changed files with 43 additions and 3 deletions
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30
test/unit/io.js
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@@ -826,6 +826,36 @@ describe('Input/output', function () {
});
});
it('Optimise coding generates smaller output length', function (done) {
// First generate with optimize coding enabled (default)
sharp(fixtures.inputJpg)
.resize(320, 240)
.jpeg()
.toBuffer(function (err, withOptimiseCoding, withInfo) {
if (err) throw err;
assert.strictEqual(true, withOptimiseCoding.length > 0);
assert.strictEqual(withOptimiseCoding.length, withInfo.size);
assert.strictEqual('jpeg', withInfo.format);
assert.strictEqual(320, withInfo.width);
assert.strictEqual(240, withInfo.height);
// Then generate with coding disabled
sharp(fixtures.inputJpg)
.resize(320, 240)
.jpeg({ optimizeCoding: false })
.toBuffer(function (err, withoutOptimiseCoding, withoutInfo) {
if (err) throw err;
assert.strictEqual(true, withoutOptimiseCoding.length > 0);
assert.strictEqual(withoutOptimiseCoding.length, withoutInfo.size);
assert.strictEqual('jpeg', withoutInfo.format);
assert.strictEqual(320, withoutInfo.width);
assert.strictEqual(240, withoutInfo.height);
// Verify optimised image is of a smaller size
assert.strictEqual(true, withOptimiseCoding.length < withoutOptimiseCoding.length);
done();
});
});
});
it('Convert SVG to PNG at default 72DPI', function (done) {
sharp(fixtures.inputSvg)
.resize(1024)