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Merge pull request #3566 from radarhere/i16

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Added I;16 PNG save
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Hugo 2019-03-12 12:25:53 +02:00 committed by GitHub
commit e3eac00b1f
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4 changed files with 12 additions and 16 deletions
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21
Tests/test_file_png.py
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@ -88,20 +88,13 @@ class TestFilePng(PillowTestCase):
self.assertEqual(im.format, "PNG")
self.assertEqual(im.get_format_mimetype(), 'image/png')
hopper("1").save(test_file)
Image.open(test_file)
hopper("L").save(test_file)
Image.open(test_file)
hopper("P").save(test_file)
Image.open(test_file)
hopper("RGB").save(test_file)
Image.open(test_file)
hopper("I").save(test_file)
Image.open(test_file)
for mode in ["1", "L", "P", "RGB", "I", "I;16"]:
im = hopper(mode)
im.save(test_file)
reloaded = Image.open(test_file)
if mode == "I;16":
reloaded = reloaded.convert(mode)
self.assert_image_equal(reloaded, im)
def test_invalid_file(self):
invalid_file = "Tests/images/flower.jpg"

5
docs/handbook/image-file-formats.rst
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@ -459,8 +459,9 @@ Pillow reads and writes PCX files containing ``1``, ``L``, ``P``, or ``RGB`` dat
PNG
^^^
Pillow identifies, reads, and writes PNG files containing ``1``, ``L``, ``P``,
``RGB``, or ``RGBA`` data. Interlaced files are supported as of v1.1.7.
Pillow identifies, reads, and writes PNG files containing ``1``, ``L``, ``LA``,
``I``, ``P``, ``RGB`` or ``RGBA`` data. Interlaced files are supported as of
v1.1.7.
As of Pillow 6.0, EXIF data can be read from PNG images. However, unlike other
image formats, EXIF data is not guaranteed to have been read until

1
src/PIL/PngImagePlugin.py
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@ -707,6 +707,7 @@ _OUTMODES = {
"L": ("L", b'\x08\x00'),
"LA": ("LA", b'\x08\x04'),
"I": ("I;16B", b'\x10\x00'),
"I;16": ("I;16B", b'\x10\x00'),
"P;1": ("P;1", b'\x01\x03'),
"P;2": ("P;2", b'\x02\x03'),
"P;4": ("P;4", b'\x04\x03'),

1
src/libImaging/Pack.c
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@ -639,6 +639,7 @@ static struct {
/* storage modes */
{"I;16", "I;16", 16, copy2},
{"I;16", "I;16B", 16, packI16N_I16B},
{"I;16B", "I;16B", 16, copy2},
{"I;16L", "I;16L", 16, copy2},
{"I;16", "I;16N", 16, packI16N_I16}, // LibTiff native->image endian.