🦀 (Rust): Expose metadata compress and disable metadata compress by default

.github/workflows/test.yml

@@ -59,6 +59,7 @@ jobs:
 
       - name: Test with pytest
         run: |
+          brew install inih
           source venv/bin/activate
           pip install -e .[dev]
           pytest test/ --junitxml=junit/test-results-${{ matrix.python-version }}.xml

pillow_jxl/JpegXLImagePlugin.py

@@ -107,6 +107,7 @@ def _save(im, fp, filename, save_all=False):
     use_original_profile = info.get("use_original_profile", False)
     jpeg_encode = info.get("lossless_jpeg", None)
     num_threads = info.get("num_threads", -1)
+    compress_metadata = info.get("compress_metadata", False)
 
     enc = Encoder(
         mode=im.mode,
@@ -140,6 +141,7 @@ def _save(im, fp, filename, save_all=False):
             "exif": exif or None,
             "jumb": info.get("jumb") or None,
             "xmp": info.get("xmp") or None,
+            "compress": compress_metadata,
         }
         data = enc(im.tobytes(), im.width, im.height, jpeg_encode=False, **metadata)
     fp.write(data)

pyproject.toml

@@ -22,7 +22,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-dev = ["numpy", "pytest"]
+dev = ["numpy", "pytest", "pyexiv2"]
 
 [project.urls]
 "Homepage" = "https://github.com/Isotr0py/pillow-jpegxl-plugin"

src/encode.rs

@@ -73,7 +73,7 @@ impl Encoder {
         })
     }
 
-    #[pyo3(signature = (data, width, height, jpeg_encode, exif=None, jumb=None, xmp=None))]
+    #[pyo3(signature = (data, width, height, jpeg_encode, exif=None, jumb=None, xmp=None, compress=false))]
     fn __call__(
         &self,
         py: Python,
@@ -84,8 +84,11 @@ impl Encoder {
         exif: Option<&[u8]>,
         jumb: Option<&[u8]>,
         xmp: Option<&[u8]>,
+        compress: bool,
     ) -> PyResult<Cow<'_, [u8]>> {
-        py.allow_threads(|| self.call_inner(data, width, height, jpeg_encode, exif, jumb, xmp))
+        py.allow_threads(|| {
+            self.call_inner(data, width, height, jpeg_encode, exif, jumb, xmp, compress)
+        })
     }
 
     fn __repr__(&self) -> PyResult<String> {
@@ -106,6 +109,7 @@ impl Encoder {
         exif: Option<&[u8]>,
         jumb: Option<&[u8]>,
         xmp: Option<&[u8]>,
+        compress: bool,
     ) -> PyResult<Cow<'_, [u8]>> {
         let parallel_runner = ThreadsRunner::new(
             None,
@@ -149,17 +153,17 @@ impl Encoder {
                 let frame = EncoderFrame::new(data).num_channels(self.num_channels);
                 if let Some(exif_data) = exif {
                     encoder
-                        .add_metadata(&Metadata::Exif(exif_data), true)
+                        .add_metadata(&Metadata::Exif(exif_data), compress)
                         .map_err(to_pyjxlerror)?
                 }
                 if let Some(xmp_data) = xmp {
                     encoder
-                        .add_metadata(&Metadata::Xmp(xmp_data), true)
+                        .add_metadata(&Metadata::Xmp(xmp_data), compress)
                         .map_err(to_pyjxlerror)?
                 }
                 if let Some(jumb_data) = jumb {
                     encoder
-                        .add_metadata(&Metadata::Jumb(jumb_data), true)
+                        .add_metadata(&Metadata::Jumb(jumb_data), compress)
                         .map_err(to_pyjxlerror)?
                 }
                 encoder

src/lib.rs

@@ -11,6 +11,6 @@ create_exception!(my_module, JxlException, PyRuntimeError, "Jxl Error");
 fn pillow_jxl(_py: Python, m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<decode::Decoder>()?;
     m.add_class::<encode::Encoder>()?;
-    m.add("JxlException", m.py().get_type_bound::<JxlException>())?;
+    m.add("JxlException", m.py().get_type::<JxlException>())?;
     Ok(())
 }

test/images/metadata/sample.xmp

@@ -0,0 +1 @@
+<?xpacket begin="" id="W5M0MpCehiHzreSzNTczkc9d"?> <x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 4.4.0-Exiv2"> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"> <rdf:Description rdf:about="" xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/" xmlns:stEvt="http://ns.adobe.com/xap/1.0/sType/ResourceEvent#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:GIMP="http://www.gimp.org/xmp/" xmlns:xmp="http://ns.adobe.com/xap/1.0/" xmpMM:DocumentID="gimp:docid:gimp:10093e7e-33ea-4901-a7ce-a3c04b8b6480" xmpMM:InstanceID="xmp.iid:737430f3-5b4d-49cf-9873-c10684618917" xmpMM:OriginalDocumentID="xmp.did:f7302aac-e69b-4ad8-ac19-58a76e2fc4f7" dc:Format="image/jpeg" GIMP:API="2.0" GIMP:Platform="Linux" GIMP:TimeStamp="1635353959433667" GIMP:Version="2.10.28" xmp:CreatorTool="GIMP 2.10"> <xmpMM:History> <rdf:Seq> <rdf:li stEvt:action="saved" stEvt:changed="/metadata" stEvt:instanceID="xmp.iid:735c4bc4-11be-4e71-8aad-0ddd90c9607d" stEvt:softwareAgent="Gimp 2.10 (Linux)" stEvt:when="2021-10-27T18:58:46+02:00"/> <rdf:li stEvt:action="saved" stEvt:changed="/" stEvt:instanceID="xmp.iid:70d81176-171d-43b8-b687-1eb80d302337" stEvt:softwareAgent="Gimp 2.10 (Linux)" stEvt:when="2021-10-27T18:59:19+02:00"/> </rdf:Seq> </xmpMM:History> <dc:title> <rdf:Alt> <rdf:li xml:lang="x-default">test</rdf:li> </rdf:Alt> </dc:title> </rdf:Description> </rdf:RDF> </x:xmpmeta>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 <?xpacket end="w"?>

test/test_plugin.py

@@ -1,5 +1,6 @@
 import tempfile
 
+import pyexiv2
 import pytest
 import numpy as np
 from PIL import Image
@@ -75,3 +76,51 @@ def test_icc_profile():
     assert img_ori.size == img_jxl.size
     assert img_ori.mode == img_jxl.mode
     assert img_ori.info["icc_profile"] == img_jxl.info["icc_profile"]
+
+
+def test_metadata_decode():
+    # Load a JPEG image
+    img_ori = Image.open("test/images/metadata/1x1_exif_xmp.jpg")
+    img_jxl = Image.open("test/images/metadata/1x1_exif_xmp.jxl")
+    assert img_ori.getexif() == img_jxl.getexif()
+
+
+def test_metadata_encode_from_jpg():
+    # Load a JPEG image
+    ref_img_path = "test/images/metadata/1x1_exif_xmp.jpg"
+    temp = tempfile.mktemp(suffix=".jxl")
+    img_ori = Image.open(ref_img_path)
+    img_ori.save(temp, use_container=True)
+
+    img_enc = Image.open(temp)
+    img_enc_exiv2 = pyexiv2.Image(temp)
+    img_ori_exiv2 = pyexiv2.Image(ref_img_path)
+    assert img_ori.getexif() == img_enc.getexif()
+    assert img_ori_exiv2.read_exif() == img_enc_exiv2.read_exif()
+
+
+def test_metadata_encode_from_raw_exif():
+    with open("test/images/metadata/sample.exif", "rb") as f:
+        ref_exif = f.read()
+    img_ori = Image.open("test/images/sample.png")
+    temp = tempfile.mktemp(suffix=".jxl")
+    img_ori.save(temp, exif=ref_exif)
+
+    ref_exif = pyexiv2.ImageData(ref_exif).read_exif()
+    jxl_exif = pyexiv2.Image(temp).read_exif()
+    assert ref_exif == jxl_exif
+
+
+def test_metadata_encode_from_pil_exif():
+    exif_img_path = "test/images/metadata/1x1_exif_xmp.jpg"
+    dummy_img = Image.open("test/images/sample.png")
+    exif_img = Image.open(exif_img_path)
+    temp = tempfile.mktemp(suffix=".jxl")
+    dummy_img.save(temp, exif=exif_img.getexif().tobytes())
+
+    ref_exif = pyexiv2.Image(exif_img_path).read_exif()
+    jxl_exif = pyexiv2.Image(temp).read_exif()
+    for key in ref_exif:
+        # Skip UserComment and GPSAltitude as they are broken
+        if key not in ("Exif.Photo.UserComment", 'Exif.GPSInfo.GPSAltitude'):
+            assert ref_exif[key] == jxl_exif[key]