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Gamma correction and premultiply do not mix

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Skip premultiply for fast blur/sharpen

Automate gamma correction tests
This commit is contained in:
Lovell Fuller
2015-08-11 21:51:22 +01:00
parent 9c83d98bbb
commit 36ac8828f2
7 changed files with 58 additions and 39 deletions
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43
test/unit/gamma.js
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@@ -12,32 +12,53 @@ describe('Gamma correction', function() {
it('value of 0.0 (disabled)', function(done) {
sharp(fixtures.inputJpgWithGammaHoliness)
.resize(129, 111)
.toFile(fixtures.path('output.gamma-0.0.jpg'), done);
.toBuffer(function(err, data, info) {
assert.strictEqual('jpeg', info.format);
assert.strictEqual(129, info.width);
assert.strictEqual(111, info.height);
fixtures.assertSimilar(fixtures.expected('gamma-0.0.jpg'), data, done);
});
});
it('value of 2.2 (default)', function(done) {
sharp(fixtures.inputJpgWithGammaHoliness)
.resize(129, 111)
.gamma()
.toFile(fixtures.path('output.gamma-2.2.jpg'), done);
.toBuffer(function(err, data, info) {
assert.strictEqual('jpeg', info.format);
assert.strictEqual(129, info.width);
assert.strictEqual(111, info.height);
fixtures.assertSimilar(fixtures.expected('gamma-2.2.jpg'), data, done);
});
});
it('value of 3.0', function(done) {
sharp(fixtures.inputJpgWithGammaHoliness)
.resize(129, 111)
.gamma(3)
.toFile(fixtures.path('output.gamma-3.0.jpg'), done);
.toBuffer(function(err, data, info) {
assert.strictEqual('jpeg', info.format);
assert.strictEqual(129, info.width);
assert.strictEqual(111, info.height);
fixtures.assertSimilar(fixtures.expected('gamma-3.0.jpg'), data, done);
});
});
it('invalid value', function(done) {
var isValid = true;
try {
it('alpha transparency', function(done) {
sharp(fixtures.inputPngOverlayLayer1)
.resize(320)
.gamma()
.toBuffer(function(err, data, info) {
assert.strictEqual('png', info.format);
assert.strictEqual(320, info.width);
fixtures.assertSimilar(fixtures.expected('gamma-alpha.jpg'), data, done);
});
});
it('invalid value', function() {
assert.throws(function() {
sharp(fixtures.inputJpgWithGammaHoliness).gamma(4);
} catch (err) {
isValid = false;
}
assert.strictEqual(false, isValid);
done();
});
});
});