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Add ensureAlpha op, adds alpha channel if missing #1153

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Lovell Fuller
2019-01-05 21:12:33 +00:00
parent 8e70579e47
commit 4c01a099ea
9 changed files with 84 additions and 0 deletions
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21
test/unit/alpha.js
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@@ -115,6 +115,7 @@ describe('Alpha transparency', function () {
fixtures.inputWebP
].map(function (input) {
return sharp(input)
.resize(10)
.removeAlpha()
.toBuffer({ resolveWithObject: true })
.then(function (result) {
@@ -122,4 +123,24 @@ describe('Alpha transparency', function () {
});
}));
});
it('Ensures alpha from fixtures without transparency, ignores those with', function () {
return Promise.all([
fixtures.inputPngWithTransparency,
fixtures.inputPngWithTransparency16bit,
fixtures.inputWebPWithTransparency,
fixtures.inputJpg,
fixtures.inputPng,
fixtures.inputWebP
].map(function (input) {
return sharp(input)
.resize(10)
.ensureAlpha()
.png()
.toBuffer({ resolveWithObject: true })
.then(function (result) {
assert.strictEqual(4, result.info.channels);
});
}));
});
});