Pass back index of image in sequence, instead of filename

Tests/test_file_apng.py

@@ -673,7 +673,7 @@ def callback(filename, frame_number, n_frames):
         progress.append((filename, frame_number, n_frames))
 
     Image.new("RGB", (1, 1)).save(out, "PNG", save_all=True, progress=callback)
-    assert progress == [(None, 1, 1)]
+    assert progress == [(0, 1, 1)]
 
     out = BytesIO()
     progress = []
@@ -685,13 +685,13 @@ def callback(filename, frame_number, n_frames):
             )
 
     assert progress == [
-        ("Tests/images/apng/single_frame.png", 1, 7),
-        ("Tests/images/apng/single_frame.png", 2, 7),
-        ("Tests/images/apng/delay.png", 3, 7),
-        ("Tests/images/apng/delay.png", 4, 7),
-        ("Tests/images/apng/delay.png", 5, 7),
-        ("Tests/images/apng/delay.png", 6, 7),
-        ("Tests/images/apng/delay.png", 7, 7),
+        (0, 1, 7),
+        (1, 2, 7),
+        (2, 3, 7),
+        (2, 4, 7),
+        (2, 5, 7),
+        (2, 6, 7),
+        (2, 7, 7),
     ]
 
 

Tests/test_file_gif.py

@@ -273,7 +273,7 @@ def callback(filename, frame_number, n_frames):
         progress.append((filename, frame_number, n_frames))
 
     Image.new("RGB", (1, 1)).save(out, "GIF", save_all=True, progress=callback)
-    assert progress == [(None, 1, 1)]
+    assert progress == [(0, 1, 1)]
 
     out = BytesIO()
     progress = []
@@ -282,9 +282,9 @@ def callback(filename, frame_number, n_frames):
         with Image.open("Tests/images/chi.gif") as im2:
             im.save(out, "GIF", save_all=True, append_images=[im2], progress=callback)
 
-    expected = [("Tests/images/hopper.gif", 1, 32)]
+    expected = [(0, 1, 32)]
     for i in range(31):
-        expected.append(("Tests/images/chi.gif", i + 2, 32))
+        expected.append((1, i + 2, 32))
     assert progress == expected
 
 

Tests/test_file_mpo.py

@@ -288,7 +288,7 @@ def callback(filename, frame_number, n_frames):
         progress.append((filename, frame_number, n_frames))
 
     Image.new("RGB", (1, 1)).save(out, "MPO", save_all=True, progress=callback)
-    assert progress == [(None, 1, 1)]
+    assert progress == [(0, 1, 1)]
 
     out = BytesIO()
     progress = []
@@ -298,8 +298,8 @@ def callback(filename, frame_number, n_frames):
             im.save(out, "MPO", save_all=True, append_images=[im2], progress=callback)
 
     assert progress == [
-        ("Tests/images/sugarshack.mpo", 1, 4),
-        ("Tests/images/sugarshack.mpo", 2, 4),
-        ("Tests/images/frozenpond.mpo", 3, 4),
-        ("Tests/images/frozenpond.mpo", 4, 4),
+        (0, 1, 4),
+        (0, 2, 4),
+        (1, 3, 4),
+        (1, 4, 4),
     ]

Tests/test_file_pdf.py

@@ -177,7 +177,7 @@ def callback(filename, frame_number, n_frames):
         progress.append((filename, frame_number, n_frames))
 
     Image.new("RGB", (1, 1)).save(out, "PDF", save_all=True, progress=callback)
-    assert progress == [(None, 1, 1)]
+    assert progress == [(0, 1, 1)]
 
     out = BytesIO()
     progress = []
@@ -187,10 +187,10 @@ def callback(filename, frame_number, n_frames):
             im.save(out, "PDF", save_all=True, append_images=[im2], progress=callback)
 
     assert progress == [
-        ("Tests/images/sugarshack.mpo", 1, 4),
-        ("Tests/images/sugarshack.mpo", 2, 4),
-        ("Tests/images/frozenpond.mpo", 3, 4),
-        ("Tests/images/frozenpond.mpo", 4, 4),
+        (0, 1, 4),
+        (0, 2, 4),
+        (1, 3, 4),
+        (1, 4, 4),
     ]
 
 

Tests/test_file_tiff.py

@@ -696,7 +696,7 @@ def callback(filename, frame_number, n_frames):
             progress.append((filename, frame_number, n_frames))
 
         Image.new("RGB", (1, 1)).save(out, "TIFF", save_all=True, progress=callback)
-        assert progress == [(None, 1, 1)]
+        assert progress == [(0, 1, 1)]
 
         out = BytesIO()
         progress = []
@@ -708,10 +708,10 @@ def callback(filename, frame_number, n_frames):
                 )
 
         assert progress == [
-            ("Tests/images/hopper.tif", 1, 4),
-            ("Tests/images/multipage.tiff", 2, 4),
-            ("Tests/images/multipage.tiff", 3, 4),
-            ("Tests/images/multipage.tiff", 4, 4),
+            (0, 1, 4),
+            (1, 2, 4),
+            (1, 3, 4),
+            (1, 4, 4),
         ]
 
     def test_saving_icc_profile(self, tmp_path):

Tests/test_file_webp.py

@@ -131,7 +131,7 @@ def callback(filename, frame_number, n_frames):
             progress.append((filename, frame_number, n_frames))
 
         Image.new("RGB", (1, 1)).save(out, "WEBP", save_all=True, progress=callback)
-        assert progress == [(None, 1, 1)]
+        assert progress == [(0, 1, 1)]
 
         out = BytesIO()
         progress = []
@@ -142,8 +142,8 @@ def callback(filename, frame_number, n_frames):
 
         expected = []
         for i in range(42):
-            expected.append(("Tests/images/iss634.webp", i + 1, 43))
-        expected.append((None, 43, 43))
+            expected.append((0, i + 1, 43))
+        expected.append((1, 43, 43))
         assert progress == expected
 
     def test_icc_profile(self, tmp_path):

src/PIL/GifImagePlugin.py

@@ -587,7 +587,7 @@ def _write_multiple_frames(im, fp, palette):
     im_frames = []
     frame_count = 0
     background_im = None
-    for imSequence in imSequences:
+    for i, imSequence in enumerate(imSequences):
         for im_frame in ImageSequence.Iterator(imSequence):
             # a copy is required here since seek can still mutate the image
             im_frame = _normalize_mode(im_frame.copy())
@@ -618,9 +618,7 @@ def _write_multiple_frames(im, fp, palette):
                     if encoderinfo.get("duration"):
                         previous["encoderinfo"]["duration"] += encoderinfo["duration"]
                     if progress:
-                        progress(
-                            getattr(imSequence, "filename", None), frame_count, n_frames
-                        )
+                        progress(i, frame_count, n_frames)
                     continue
                 if encoderinfo.get("disposal") == 2:
                     if background_im is None:
@@ -635,7 +633,7 @@ def _write_multiple_frames(im, fp, palette):
                 bbox = None
             im_frames.append({"im": im_frame, "bbox": bbox, "encoderinfo": encoderinfo})
             if progress:
-                progress(getattr(imSequence, "filename", None), frame_count, n_frames)
+                progress(i, frame_count, n_frames)
 
     if len(im_frames) > 1:
         for frame_data in im_frames:

src/PIL/MpoImagePlugin.py

@@ -51,7 +51,7 @@ def _save_all(im, fp, filename):
         if not animated:
             _save(im, fp, filename)
             if progress:
-                progress(getattr(im, "filename", None), 1, 1)
+                progress(0, 1, 1)
             return
 
     mpf_offset = 28
@@ -62,7 +62,7 @@ def _save_all(im, fp, filename):
         n_frames = 0
         for imSequence in imSequences:
             n_frames += getattr(imSequence, "n_frames", 1)
-    for imSequence in imSequences:
+    for i, imSequence in enumerate(imSequences):
         for im_frame in ImageSequence.Iterator(imSequence):
             if not offsets:
                 # APP2 marker
@@ -83,7 +83,7 @@ def _save_all(im, fp, filename):
                 offsets.append(fp.tell() - offsets[-1])
             if progress:
                 frame_number += 1
-                progress(getattr(imSequence, "filename", None), frame_number, n_frames)
+                progress(i, frame_number, n_frames)
 
     ifd = TiffImagePlugin.ImageFileDirectory_v2()
     ifd[0xB000] = b"0100"

src/PIL/PdfImagePlugin.py

@@ -248,7 +248,7 @@ def _save(im, fp, filename, save_all=False):
 
     progress = im.encoderinfo.get("progress")
     page_number = 0
-    for im_sequence in ims:
+    for i, im_sequence in enumerate(ims):
         im_pages = ImageSequence.Iterator(im_sequence) if save_all else [im_sequence]
         for im in im_pages:
             image_ref, procset = _write_image(im, filename, existing_pdf, image_refs)
@@ -283,9 +283,7 @@ def _save(im, fp, filename, save_all=False):
 
             page_number += 1
             if progress:
-                progress(
-                    getattr(im_sequence, "filename", None), page_number, number_of_pages
-                )
+                progress(i, page_number, number_of_pages)
 
     #
     # trailer

src/PIL/PngImagePlugin.py

@@ -1104,7 +1104,7 @@ def _write_multiple_frames(im, fp, chunk, rawmode, default_image, append_images)
 
     im_frames = []
     frame_count = 0
-    for imSequence in imSequences:
+    for i, imSequence in enumerate(imSequences):
         for im_frame in ImageSequence.Iterator(imSequence):
             if im_frame.mode == rawmode:
                 im_frame = im_frame.copy()
@@ -1155,17 +1155,15 @@ def _write_multiple_frames(im, fp, chunk, rawmode, default_image, append_images)
                         "duration", duration
                     )
                     if progress:
-                        progress(
-                            getattr(imSequence, "filename", None), frame_count, n_frames
-                        )
+                        progress(i, frame_count, n_frames)
                     continue
             else:
                 bbox = None
             if "duration" not in encoderinfo:
                 encoderinfo["duration"] = duration
             im_frames.append({"im": im_frame, "bbox": bbox, "encoderinfo": encoderinfo})
             if progress:
-                progress(getattr(imSequence, "filename", None), frame_count, n_frames)
+                progress(i, frame_count, n_frames)
 
     # animation control
     chunk(

src/PIL/TiffImagePlugin.py

@@ -2122,7 +2122,7 @@ def _save_all(im, fp, filename):
     if not hasattr(im, "n_frames") and not append_images:
         _save(im, fp, filename)
         if progress:
-            progress(getattr(im, "filename", None), 1, 1)
+            progress(0, 1, 1)
         return
 
     cur_idx = im.tell()
@@ -2134,7 +2134,7 @@ def _save_all(im, fp, filename):
             n_frames += getattr(ims, "n_frames", 1)
     try:
         with AppendingTiffWriter(fp) as tf:
-            for ims in imSequences:
+            for i, ims in enumerate(imSequences):
                 ims.encoderinfo = encoderinfo
                 ims.encoderconfig = encoderconfig
                 if not hasattr(ims, "n_frames"):
@@ -2148,7 +2148,7 @@ def _save_all(im, fp, filename):
                     _save(ims, tf, filename)
                     if progress:
                         frame_number += 1
-                        progress(getattr(ims, "filename", None), frame_number, n_frames)
+                        progress(i, frame_number, n_frames)
 
                     tf.newFrame()
     finally:

src/PIL/WebPImagePlugin.py

@@ -188,7 +188,7 @@ def _save_all(im, fp, filename):
     if total == 1:
         _save(im, fp, filename)
         if progress:
-            progress(getattr(im, "filename", None), 1, 1)
+            progress(0, 1, 1)
         return
 
     background = (0, 0, 0, 0)
@@ -261,7 +261,7 @@ def _save_all(im, fp, filename):
     timestamp = 0
     cur_idx = im.tell()
     try:
-        for ims in [im] + append_images:
+        for i, ims in enumerate([im] + append_images):
             # Get # of frames in this image
             nfr = getattr(ims, "n_frames", 1)
 
@@ -304,7 +304,7 @@ def _save_all(im, fp, filename):
                     timestamp += duration
                 frame_idx += 1
                 if progress:
-                    progress(getattr(ims, "filename", None), frame_idx, total)
+                    progress(i, frame_idx, total)
 
     finally:
         im.seek(cur_idx)