Ensure withMetadata adds default sRGB profile #3761

docs/changelog.md

@@ -21,6 +21,9 @@ Requires libvips v8.14.3
   [#3758](https://github.com/lovell/sharp/pull/3758)
   [@sho-xizz](https://github.com/sho-xizz)
 
+* Ensure `withMetadata` adds default sRGB profile.
+  [#3761](https://github.com/lovell/sharp/issues/3761)
+
 ### v0.32.4 - 21st July 2023
 
 * Upgrade to libvips v8.14.3 for upstream bug fixes.

src/pipeline.cc

@@ -788,9 +788,9 @@ class PipelineWorker : public Napi::AsyncWorker {
       }
 
       // Apply output ICC profile
-      if (!baton->withMetadataIcc.empty()) {
+      if (baton->withMetadata) {
         image = image.icc_transform(
-          const_cast<char*>(baton->withMetadataIcc.data()),
+          baton->withMetadataIcc.empty() ? "srgb" : const_cast<char*>(baton->withMetadataIcc.data()),
           VImage::option()
             ->set("input_profile", processingProfile)
             ->set("embedded", TRUE)

test/unit/metadata.js

@@ -781,6 +781,19 @@ describe('Image metadata', function () {
     });
   });
 
+  it('withMetadata adds default sRGB profile', async () => {
+    const data = await sharp(fixtures.inputJpg)
+      .resize(32, 24)
+      .withMetadata()
+      .toBuffer();
+
+    const metadata = await sharp(data).metadata();
+    const { colorSpace, deviceClass, intent } = icc.parse(metadata.icc);
+    assert.strictEqual(colorSpace, 'RGB');
+    assert.strictEqual(deviceClass, 'Monitor');
+    assert.strictEqual(intent, 'Perceptual');
+  });
+
   it('File input with corrupt header fails gracefully', function (done) {
     sharp(fixtures.inputJpgWithCorruptHeader)
       .metadata(function (err) {