Release Vulpes OS 2.7-preview.22

tools/test-photo-orientation.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""Compare Gaia JPEG metadata with the real Gecko decoder for all EXIF orientations."""
+import base64
+import importlib.util
+import io
+import json
+from pathlib import Path
+from PIL import Image
+from marionette_client import Client
+spec=importlib.util.spec_from_file_location('probe',Path(__file__).with_name('probe-desktop.py'))
+probe=importlib.util.module_from_spec(spec);spec.loader.exec_module(probe)
+results=[]
+with Client(2857) as c:
+    probe.register(c)
+    loaded=probe.evaluate(c,'system',"""for(const path of ['blobview.js','media/jpeg_metadata_parser.js','media/image_size.js']) {
+        await new Promise((ok,fail)=>{const s=document.createElement('script');s.src='/shared/js/'+path;s.onload=ok;s.onerror=fail;document.head.append(s);});
+    }return true;""")
+    assert loaded.get('value') is True,loaded
+    for orientation in range(1,9):
+        image=Image.new('RGB',(80,40),'red');exif=image.getexif();exif[274]=orientation
+        out=io.BytesIO();image.save(out,'JPEG',exif=exif)
+        url='data:image/jpeg;base64,'+base64.b64encode(out.getvalue()).decode()
+        value=probe.evaluate(c,'system',f"""const blob=await (await fetch({json.dumps(url)})).blob();
+            const meta=await new Promise((ok,fail)=>getImageSize(blob,ok,fail));
+            const img=new Image();img.src=URL.createObjectURL(blob);try {{await img.decode();
+            return {{width:meta.width,height:meta.height,rotation:meta.rotation || 0,mirrored:!!meta.mirrored,
+              decodedWidth:img.naturalWidth,decodedHeight:img.naturalHeight}};
+            }}finally{{URL.revokeObjectURL(img.src);}}""")
+        row=value['value'];row['exif']=orientation
+        assert row['width']==row['decodedWidth'] and row['height']==row['decodedHeight'],row
+        assert row['rotation']==0 and row['mirrored'] is False,row
+        results.append(row)
+print(json.dumps(results,indent=2))