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Expose libjpeg extension param features

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Trellis quantisation, overshoot deringing and scan optimisation
This commit is contained in:
Lovell Fuller
2015-04-14 11:33:25 +01:00
parent be39297f3b
commit f6fd45cc90
4 changed files with 206 additions and 24 deletions
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138
test/unit/io.js
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@@ -317,19 +317,21 @@ describe('Input/output', function() {
});
});
it('WebP output', function(done) {
sharp(fixtures.inputJpg)
.resize(320, 240)
.toFormat(sharp.format.webp)
.toBuffer(function(err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual('webp', info.format);
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
done();
});
});
if (sharp.format.webp.output.buffer) {
it('WebP output', function(done) {
sharp(fixtures.inputJpg)
.resize(320, 240)
.toFormat(sharp.format.webp)
.toBuffer(function(err, data, info) {
if (err) throw err;
assert.strictEqual(true, data.length > 0);
assert.strictEqual('webp', info.format);
assert.strictEqual(320, info.width);
assert.strictEqual(240, info.height);
done();
});
});
}
it('Invalid output format', function(done) {
var isValid = false;
@@ -394,17 +396,19 @@ describe('Input/output', function() {
});
});
it('WebP', function(done) {
sharp(fixtures.inputWebP).resize(320, 80).toFile(fixtures.outputZoinks, function(err, info) {
if (err) throw err;
assert.strictEqual(true, info.size > 0);
assert.strictEqual('webp', info.format);
assert.strictEqual(320, info.width);
assert.strictEqual(80, info.height);
fs.unlinkSync(fixtures.outputZoinks);
done();
if (sharp.format.webp.input.file) {
it('WebP', function(done) {
sharp(fixtures.inputWebP).resize(320, 80).toFile(fixtures.outputZoinks, function(err, info) {
if (err) throw err;
assert.strictEqual(true, info.size > 0);
assert.strictEqual('webp', info.format);
assert.strictEqual(320, info.width);
assert.strictEqual(80, info.height);
fs.unlinkSync(fixtures.outputZoinks);
done();
});
});
});
}
it('TIFF', function(done) {
sharp(fixtures.inputTiff).resize(320, 80).toFile(fixtures.outputZoinks, function(err, info) {
@@ -511,6 +515,94 @@ describe('Input/output', function() {
});
});
if (semver.gte(sharp.libvipsVersion(), '8.0.0')) {
it('Trellis quantisation [libvips ' + sharp.libvipsVersion() + '>=8.0.0]', function(done) {
// First generate without
sharp(fixtures.inputJpg)
.resize(320, 240)
.trellisQuantisation(false)
.toBuffer(function(err, withoutData, withoutInfo) {
if (err) throw err;
assert.strictEqual(true, withoutData.length > 0);
assert.strictEqual(withoutData.length, withoutInfo.size);
assert.strictEqual('jpeg', withoutInfo.format);
assert.strictEqual(320, withoutInfo.width);
assert.strictEqual(240, withoutInfo.height);
// Then generate with
sharp(fixtures.inputJpg)
.resize(320, 240)
.trellisQuantization()
.toBuffer(function(err, withData, withInfo) {
if (err) throw err;
assert.strictEqual(true, withData.length > 0);
assert.strictEqual(withData.length, withInfo.size);
assert.strictEqual('jpeg', withInfo.format);
assert.strictEqual(320, withInfo.width);
assert.strictEqual(240, withInfo.height);
// Verify image is same (as mozjpeg may not be present) size or less
assert.strictEqual(true, withData.length <= withoutData.length);
done();
});
});
});
it('Overshoot deringing [libvips ' + sharp.libvipsVersion() + '>=8.0.0]', function(done) {
// First generate without
sharp(fixtures.inputJpg)
.resize(320, 240)
.overshootDeringing(false)
.toBuffer(function(err, withoutData, withoutInfo) {
if (err) throw err;
assert.strictEqual(true, withoutData.length > 0);
assert.strictEqual(withoutData.length, withoutInfo.size);
assert.strictEqual('jpeg', withoutInfo.format);
assert.strictEqual(320, withoutInfo.width);
assert.strictEqual(240, withoutInfo.height);
// Then generate with
sharp(fixtures.inputJpg)
.resize(320, 240)
.overshootDeringing()
.toBuffer(function(err, withData, withInfo) {
if (err) throw err;
assert.strictEqual(true, withData.length > 0);
assert.strictEqual(withData.length, withInfo.size);
assert.strictEqual('jpeg', withInfo.format);
assert.strictEqual(320, withInfo.width);
assert.strictEqual(240, withInfo.height);
done();
});
});
});
it('Optimise scans [libvips ' + sharp.libvipsVersion() + '>=8.0.0]', function(done) {
// First generate without
sharp(fixtures.inputJpg)
.resize(320, 240)
.optimiseScans(false)
.toBuffer(function(err, withoutData, withoutInfo) {
if (err) throw err;
assert.strictEqual(true, withoutData.length > 0);
assert.strictEqual(withoutData.length, withoutInfo.size);
assert.strictEqual('jpeg', withoutInfo.format);
assert.strictEqual(320, withoutInfo.width);
assert.strictEqual(240, withoutInfo.height);
// Then generate with
sharp(fixtures.inputJpg)
.resize(320, 240)
.optimizeScans()
.toBuffer(function(err, withData, withInfo) {
if (err) throw err;
assert.strictEqual(true, withData.length > 0);
assert.strictEqual(withData.length, withInfo.size);
assert.strictEqual('jpeg', withInfo.format);
assert.strictEqual(320, withInfo.width);
assert.strictEqual(240, withInfo.height);
// Verify image is of a different size (progressive output even without mozjpeg)
assert.strictEqual(true, withData.length != withoutData.length);
done();
});
});
});
}
if (sharp.format.magick.input.file) {
it('Convert SVG, if supported, to PNG', function(done) {
sharp(fixtures.inputSvg)