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Create blank image (width, height, channels, background) #470

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Lovell Fuller
2017-03-11 11:46:01 +00:00
parent 701b1c4216
commit 1aa053ce6f
12 changed files with 200 additions and 26 deletions
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60
test/unit/io.js
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@@ -1156,6 +1156,66 @@ describe('Input/output', function () {
});
});
describe('create new image', function () {
it('RGB', function (done) {
const create = {
width: 10,
height: 20,
channels: 3,
background: { r: 0, g: 255, b: 0 }
};
sharp(null, { create: create })
.jpeg()
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(create.width, info.width);
assert.strictEqual(create.height, info.height);
assert.strictEqual(create.channels, info.channels);
assert.strictEqual('jpeg', info.format);
fixtures.assertSimilar(fixtures.expected('create-rgb.jpg'), data, done);
});
});
it('RGBA', function (done) {
const create = {
width: 20,
height: 10,
channels: 4,
background: { r: 255, g: 0, b: 0, alpha: 128 }
};
sharp(null, { create: create })
.png()
.toBuffer(function (err, data, info) {
if (err) throw err;
assert.strictEqual(create.width, info.width);
assert.strictEqual(create.height, info.height);
assert.strictEqual(create.channels, info.channels);
assert.strictEqual('png', info.format);
fixtures.assertSimilar(fixtures.expected('create-rgba.png'), data, done);
});
});
it('Invalid channels', function () {
const create = {
width: 10,
height: 20,
channels: 2,
background: { r: 0, g: 0, b: 0 }
};
assert.throws(function () {
sharp(null, { create: create });
});
});
it('Missing background', function () {
const create = {
width: 10,
height: 20,
channels: 3
};
assert.throws(function () {
sharp(null, { create: create });
});
});
});
it('Queue length change events', function (done) {
let eventCounter = 0;
const queueListener = function (queueLength) {