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Add support for repeated/tiled overlay image (#443)

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USAGE: overlayWith('overlayimage.png', { tile: true, gravity: northwest} )
When using the tile option, the gravity option is applied to the extracted part of the tiled overlay image.
This commit is contained in:
lemnisk8
2016-05-26 21:12:17 +05:30
committed by Lovell Fuller
parent e699e36270
commit 62554b766f
16 changed files with 103 additions and 0 deletions
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61
test/unit/overlay.js
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@@ -242,4 +242,65 @@ describe('Overlays', function() {
});
});
describe('Overlay with tile enabled and gravity', function() {
Object.keys(sharp.gravity).forEach(function(gravity) {
it(gravity, function(done) {
var expected = fixtures.expected('overlay-tile-gravity-' + gravity + '.jpg');
sharp(fixtures.inputJpg)
.resize(80)
.overlayWith(fixtures.inputPngWithTransparency16bit, {
tile: true,
gravity: gravity
})
.toBuffer(function(err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(80, info.width);
assert.strictEqual(65, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(expected, data, done);
});
});
});
});
it('With tile enabled and image rotated 90 degrees', function(done) {
var expected = fixtures.expected('overlay-tile-rotated90.jpg');
sharp(fixtures.inputJpg)
.rotate(90)
.resize(80)
.overlayWith(fixtures.inputPngWithTransparency16bit, {
tile: true
})
.toBuffer(function(err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(80, info.width);
assert.strictEqual(98, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(expected, data, done);
});
});
it('With tile enabled and image rotated 90 degrees and gravity northwest', function(done) {
var expected = fixtures.expected('overlay-tile-rotated90-gravity-northwest.jpg');
sharp(fixtures.inputJpg)
.rotate(90)
.resize(80)
.overlayWith(fixtures.inputPngWithTransparency16bit, {
tile: true,
gravity: 'northwest'
})
.toBuffer(function(err, data, info) {
if (err) throw err;
assert.strictEqual('jpeg', info.format);
assert.strictEqual(80, info.width);
assert.strictEqual(98, info.height);
assert.strictEqual(3, info.channels);
fixtures.assertSimilar(expected, data, done);
});
});
});