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add AlphaChannelError and ExifOrientationError exceptions

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This commit is contained in:
Johannes 'josch' Schauer 2019-03-28 10:26:46 +01:00
parent 07903e9ef1
commit 01022487b7
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 13 additions and 3 deletions
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16
src/img2pdf.py
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@ -363,6 +363,14 @@ class PdfTooLargeError(Exception):
pass
class AlphaChannelError(Exception):
pass
class ExifOrientationError(Exception):
pass
# without pdfrw this function is a no-op
def my_convert_load(string):
return string
@ -987,7 +995,7 @@ def get_imgmetadata(imgdata, imgformat, default_dpi, colorspace, rawdata=None):
" $ convert input.png -background white -alpha "
"remove -alpha off output.png"
)
raise Exception("Refusing to work on images with alpha channel")
raise AlphaChannelError("Refusing to work on images with alpha channel")
# Since commit 07a96209597c5e8dfe785c757d7051ce67a980fb or release 4.1.0
# Pillow retrieves the DPI from EXIF if it cannot find the DPI in the JPEG
@ -1021,9 +1029,11 @@ def get_imgmetadata(imgdata, imgformat, default_dpi, colorspace, rawdata=None):
elif value == 8:
rotation = 270
elif value in (2, 4, 5, 7):
raise Exception("Unsupported flipped rotation mode (%d)" % value)
raise ExifOrientationError(
"Unsupported flipped rotation mode (%d)" % value
)
else:
raise Exception("Invalid rotation (%d)" % value)
raise ExifOrientationError("Invalid rotation (%d)" % value)
logging.debug("rotation = %d°", rotation)