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Add support for bit depth with raw input and output (#2762)

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* Determine input raw pixel depth from the given typed array
* Allow pixel depth to be set on raw output
This commit is contained in:
Mart
2021-08-03 15:52:54 +02:00
committed by GitHub
parent eabb671b10
commit b7add480c7
9 changed files with 123 additions and 16 deletions
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41
test/unit/raw.js
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@@ -179,7 +179,7 @@ describe('Raw pixel data', function () {
});
});
describe('Ouput raw, uncompressed image data', function () {
describe('Output raw, uncompressed image data', function () {
it('1 channel greyscale image', function (done) {
sharp(fixtures.inputJpg)
.greyscale()
@@ -227,7 +227,7 @@ describe('Raw pixel data', function () {
});
});
it('extract A from RGBA', () =>
it('Extract A from RGBA', () =>
sharp(fixtures.inputPngWithTransparency)
.resize(32, 24)
.extractChannel(3)
@@ -241,4 +241,41 @@ describe('Raw pixel data', function () {
})
);
});
describe('Raw pixel depths', function () {
it('Invalid depth', function () {
assert.throws(function () {
sharp(Buffer.alloc(3), { raw: { width: 1, height: 1, channels: 3 } })
.raw({ depth: 'zoinks' });
});
});
for (const { constructor, depth, bits } of [
{ constructor: Uint8Array, depth: undefined, bits: 8 },
{ constructor: Uint8Array, depth: 'uchar', bits: 8 },
{ constructor: Uint8ClampedArray, depth: 'uchar', bits: 8 },
{ constructor: Int8Array, depth: 'char', bits: 8 },
{ constructor: Uint16Array, depth: 'ushort', bits: 16 },
{ constructor: Int16Array, depth: 'short', bits: 16 },
{ constructor: Uint32Array, depth: 'uint', bits: 32 },
{ constructor: Int32Array, depth: 'int', bits: 32 },
{ constructor: Float32Array, depth: 'float', bits: 32 },
{ constructor: Float64Array, depth: 'double', bits: 64 }
]) {
it(constructor.name, () =>
sharp(new constructor(3), { raw: { width: 1, height: 1, channels: 3 } })
.raw({ depth })
.toBuffer({ resolveWithObject: true })
.then(({ data, info }) => {
assert.strictEqual(1, info.width);
assert.strictEqual(1, info.height);
assert.strictEqual(3, info.channels);
if (depth !== undefined) {
assert.strictEqual(depth, info.depth);
}
assert.strictEqual(data.length / 3, bits / 8);
})
);
}
});
});