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one strange issue left

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This commit is contained in:
John Cupitt 2015-07-16 15:40:11 +01:00
parent 180e5efe6f
commit 83cd265e7d
3 changed files with 38 additions and 14 deletions
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16
TODO
View File

@ -1,15 +1,15 @@
- try:
>>> from gi.repository import Vips
>>> x = Vips.Image.new_from_file("images/IMG_4618.jpg")
>>> x.get_value("exif-ifd0-Orientation")
'1 (Top-left, Short, 1 components, 2 bytes)'
>>> x.set_value("exif-ifd0-Orientation", "2")
>>> x.write_to_file("x.jpg")
./test_foreign.py TestForeign.test_jpeg
Orientation comes out as zero in vipsheader -a x.jpg
the 2 is being lost somehow .... we set it, and can read it back,
but when jpeg write loops over the header fields it just sees the 1
add a test-case for changing exif from py
works if we use vips format
works if we run from python shell
some kind of caching issue?

10
libvips/foreign/vips2jpeg.c
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@ -249,7 +249,7 @@ vips_exif_set_int( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_int: %s = %d\n",
exif_tag_get_title( entry->tag ), value );
exif_tag_get_name( entry->tag ), value );
if( entry->format == EXIF_FORMAT_SHORT )
exif_set_short( entry->data + offset, bo, value );
@ -335,7 +335,7 @@ vips_exif_set_rational( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_rational: %s = \"%s\"\n",
exif_tag_get_title( entry->tag ), value );
exif_tag_get_name( entry->tag ), value );
if( entry->format == EXIF_FORMAT_RATIONAL ) {
ExifRational rv;
@ -389,7 +389,7 @@ vips_exif_set_double( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_double: %s = %g\n",
exif_tag_get_title( entry->tag ), value );
exif_tag_get_name( entry->tag ), value );
if( entry->format == EXIF_FORMAT_RATIONAL ) {
ExifRational rv;
@ -629,7 +629,6 @@ vips_exif_image_field( VipsImage *image,
return( NULL );
}
VIPS_DEBUG_MSG( "vips_exif_image_field: %s = %s\n", p + 1, string );
write_tag( ed, ifd, tag, vips_exif_set_entry, (void *) string );
return( NULL );
@ -640,8 +639,7 @@ vips_exif_update( ExifData *ed, VipsImage *image )
{
VIPS_DEBUG_MSG( "vips_exif_update: \n" );
vips_image_map( image,
vips_exif_image_field, ed );
vips_image_map( image, vips_exif_image_field, ed );
}
#endif /*HAVE_EXIF*/

26
test/test_foreign.py
View File

@ -142,6 +142,32 @@ class TestForeign(unittest.TestCase):
self.save_load("%s.jpg", self.mono)
self.save_load("%s.jpg", self.colour)
# see if we have exif parsing
have_exif = False
x = Vips.Image.new_from_file(self.jpeg_file)
try:
# our test image does have this field
y = x.get_value("exif-ifd0-Orientation")
have_exif = True
except:
pass
if have_exif:
print("have exif")
x.set_value("exif-ifd0-Orientation", "2")
y = x.get_value("exif-ifd0-Orientation")
print("orientation is", y)
x.write_to_file("test.jpg")
y = x.get_value("exif-ifd0-Orientation")
print("orientation is", y)
x = Vips.Image.new_from_file("test.jpg")
y = x.get_value("exif-ifd0-Orientation")
print("orientation is", y)
self.assertEqual(y[0], "2")
os.unlink("test.jpg")
def test_png(self):
x = Vips.type_find("VipsForeign", "pngload")
if not x.is_instantiatable():