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Expose mozjpeg quant_table flag (#1285)

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This commit is contained in:
Espen Hovlandsdal
2018-07-10 16:56:05 +02:00
committed by Lovell Fuller
parent 5cb35485f1
commit 7bbc5176a1
6 changed files with 62 additions and 0 deletions
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41
test/unit/io.js
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@@ -389,6 +389,16 @@ describe('Input/output', function () {
});
});
describe('Invalid JPEG quantisation table', function () {
[-1, 88.2, 'test'].forEach(function (table) {
it(table.toString(), function () {
assert.throws(function () {
sharp().jpeg({ quantisationTable: table });
});
});
});
});
it('Progressive JPEG image', function (done) {
sharp(fixtures.inputJpg)
.resize(320, 240)
@@ -856,6 +866,37 @@ describe('Input/output', function () {
});
});
it('Specifying quantisation table provides different JPEG', function (done) {
// First generate with default quantisation table
sharp(fixtures.inputJpg)
.resize(320, 240)
.jpeg({ optimiseCoding: false })
.toBuffer(function (err, withDefaultQuantisationTable, withInfo) {
if (err) throw err;
assert.strictEqual(true, withDefaultQuantisationTable.length > 0);
assert.strictEqual(withDefaultQuantisationTable.length, withInfo.size);
assert.strictEqual('jpeg', withInfo.format);
assert.strictEqual(320, withInfo.width);
assert.strictEqual(240, withInfo.height);
// Then generate with different quantisation table
sharp(fixtures.inputJpg)
.resize(320, 240)
.jpeg({ optimiseCoding: false, quantisationTable: 3 })
.toBuffer(function (err, withQuantTable3, withoutInfo) {
if (err) throw err;
assert.strictEqual(true, withQuantTable3.length > 0);
assert.strictEqual(withQuantTable3.length, withoutInfo.size);
assert.strictEqual('jpeg', withoutInfo.format);
assert.strictEqual(320, withoutInfo.width);
assert.strictEqual(240, withoutInfo.height);
// Verify image is same (as mozjpeg may not be present) size or less
assert.strictEqual(true, withQuantTable3.length <= withDefaultQuantisationTable.length);
done();
});
});
});
it('Convert SVG to PNG at default 72DPI', function (done) {
sharp(fixtures.inputSvg)
.resize(1024)