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Changed maximum comment length to 65531

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This commit is contained in:
Andrew Murray 2023-03-29 19:19:05 +11:00
parent 598216fb46
commit 2f66d2d6a1
3 changed files with 10 additions and 6 deletions
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10
Tests/test_file_jpeg2k.py
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@ -376,14 +376,18 @@ def test_save_comment():
for comment in ("Created by Pillow", b"Created by Pillow"):
out = BytesIO()
test_card.save(out, "JPEG2000", comment=comment)
out.seek(0)
with Image.open(out) as im:
assert im.info["comment"] == b"Created by Pillow"
too_long_comment = " " * 65531
out = BytesIO()
long_comment = b" " * 65531
test_card.save(out, "JPEG2000", comment=long_comment)
with Image.open(out) as im:
assert im.info["comment"] == long_comment
with pytest.raises(ValueError):
test_card.save(out, "JPEG2000", comment=too_long_comment)
test_card.save(out, "JPEG2000", comment=long_comment + b" ")
@pytest.mark.parametrize(

4
src/encode.c
View File

@ -1214,7 +1214,7 @@ PyImaging_Jpeg2KEncoderNew(PyObject *self, PyObject *args) {
char mct = 0;
int sgnd = 0;
Py_ssize_t fd = -1;
char *comment = NULL;
char *comment;
Py_ssize_t comment_size;
int plt = 0;
@ -1323,7 +1323,7 @@ PyImaging_Jpeg2KEncoderNew(PyObject *self, PyObject *args) {
if (comment && comment_size > 0) {
/* Size is stored as as an uint16, subtract 4 bytes for the header */
if (comment_size >= 65531) {
if (comment_size >= 65532) {
PyErr_SetString(
PyExc_ValueError,
"JPEG 2000 comment is too long");