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refactor out get_chunks

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This commit is contained in:
Eric Soroos 2017-12-20 10:27:13 +00:00
parent 1cf2deba3b
commit 1ea128c8a7
1 changed files with 19 additions and 0 deletions
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19
Tests/test_file_png.py
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@ -49,6 +49,21 @@ class TestFilePng(PillowTestCase):
if "zip_encoder" not in codecs or "zip_decoder" not in codecs: if "zip_encoder" not in codecs or "zip_decoder" not in codecs:
self.skipTest("zip/deflate support not available") self.skipTest("zip/deflate support not available")
def get_chunks(self, filename):
chunks = []
with open(filename, "rb") as fp:
fp.read(8)
png = PngImagePlugin.PngStream(fp)
while True:
cid, pos, length = png.read()
chunks.append(cid)
try:
s = png.call(cid, pos, length)
except EOFError:
break
png.crc(cid, s)
return chunks
def test_sanity(self): def test_sanity(self):
# internal version number # internal version number
@ -501,6 +516,7 @@ class TestFilePng(PillowTestCase):
test_file = self.tempfile("temp.png") test_file = self.tempfile("temp.png")
im.convert("P").save(test_file, dpi=(100, 100)) im.convert("P").save(test_file, dpi=(100, 100))
<<<<<<< 1cf2deba3bdb3ea93fdd859c0f052dfcea898c52
chunks = [] chunks = []
with open(test_file, "rb") as fp: with open(test_file, "rb") as fp:
fp.read(8) fp.read(8)
@ -513,6 +529,9 @@ class TestFilePng(PillowTestCase):
except EOFError: except EOFError:
break break
png.crc(cid, s) png.crc(cid, s)
=======
chunks = self.get_chunks(test_file)
>>>>>>> refactor out get_chunks
# https://www.w3.org/TR/PNG/#5ChunkOrdering # https://www.w3.org/TR/PNG/#5ChunkOrdering
# IHDR - shall be first # IHDR - shall be first