Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Improved I;16 operations on big endian #5901

Merged
merged 2 commits into from Dec 28, 2021
Merged

Improved I;16 operations on big endian #5901

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
4b7b07d
Fixed JPEG2000 I;16 images on big endian
radarhere Dec 21, 2021
aeb549e
Fixed unpacking I;16B to I;16 on big endian
radarhere Dec 28, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
3 changes: 0 additions & 3 deletions Tests/test_file_jpeg2k.py
View file
Open in desktop
Expand Up @@ -10,7 +10,6 @@
assert_image_equal,
assert_image_similar,
assert_image_similar_tofile,
is_big_endian,
skip_unless_feature,
)

Expand Down Expand Up @@ -234,13 +233,11 @@ def test_16bit_monochrome_has_correct_mode():
assert jp2.mode == "I;16"


@pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian")
def test_16bit_monochrome_jp2_like_tiff():
with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit:
assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.jp2", 1e-3)


@pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian")
def test_16bit_monochrome_j2k_like_tiff():
with Image.open("Tests/images/16bit.cropped.tif") as tiff_16bit:
assert_image_similar_tofile(tiff_16bit, "Tests/images/16bit.cropped.j2k", 1e-3)
Expand Down
2 changes: 0 additions & 2 deletions Tests/test_file_png.py
View file
Open in desktop
Expand Up @@ -13,7 +13,6 @@
assert_image_equal,
assert_image_equal_tofile,
hopper,
is_big_endian,
is_win32,
mark_if_feature_version,
skip_unless_feature,
Expand Down Expand Up @@ -77,7 +76,6 @@ def get_chunks(self, filename):
png.crc(cid, s)
return chunks

@pytest.mark.xfail(is_big_endian(), reason="Fails on big-endian")
def test_sanity(self, tmp_path):

# internal version number
Expand Down
6 changes: 4 additions & 2 deletions src/libImaging/Jpeg2KDecode.c
View file
Open in desktop
Expand Up @@ -180,9 +180,11 @@ j2ku_gray_i(
case 2:
for (y = 0; y < h; ++y) {
const UINT16 *data = (const UINT16 *)&tiledata[2 * y * w];
UINT16 *row = (UINT16 *)im->image[y0 + y] + x0;
UINT8 *row = (UINT8 *)im->image[y0 + y] + x0;
for (x = 0; x < w; ++x) {
*row++ = j2ku_shift(offset + *data++, shift);
UINT16 pixel = j2ku_shift(offset + *data++, shift);
*row++ = pixel;
*row++ = pixel >> 8;
}
}
break;
Expand Down
19 changes: 10 additions & 9 deletions src/libImaging/Jpeg2KEncode.c
View file
Open in desktop
Expand Up @@ -110,8 +110,15 @@ j2k_pack_i16(Imaging im, UINT8 *buf, unsigned x0, unsigned y0, unsigned w, unsig
for (y = 0; y < h; ++y) {
UINT8 *data = (UINT8 *)(im->image[y + y0] + x0);
for (x = 0; x < w; ++x) {
*ptr++ = *data++;
*ptr++ = *data++;
#ifdef WORDS_BIGENDIAN
ptr[0] = data[1];
ptr[1] = data[0];
#else
ptr[0] = data[0];
ptr[1] = data[1];
#endif
ptr += 2;
data += 2;
}
}
}
Expand Down Expand Up @@ -301,13 +308,7 @@ j2k_encode_entry(Imaging im, ImagingCodecState state) {
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_l;
} else if (strcmp(im->mode, "I;16") == 0) {
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_i16;
prec = 16;
bpp = 12;
} else if (strcmp(im->mode, "I;16B") == 0) {
Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This isn't a functional change, it's just cleaning up some duplicate code.

} else if (strcmp(im->mode, "I;16") == 0 || strcmp(im->mode, "I;16B") == 0) {
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_i16;
Expand Down
4 changes: 4 additions & 0 deletions src/libImaging/Pack.c
View file
Open in desktop
Expand Up @@ -656,7 +656,11 @@ static struct {

/* storage modes */
{"I;16", "I;16", 16, copy2},
#ifdef WORDS_BIGENDIAN
{"I;16", "I;16B", 16, packI16N_I16},
#else
{"I;16", "I;16B", 16, packI16N_I16B},
#endif
{"I;16B", "I;16B", 16, copy2},
{"I;16L", "I;16L", 16, copy2},
{"I;16", "I;16N", 16, packI16N_I16}, // LibTiff native->image endian.
Expand Down