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Make strip calculation more readable

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Miloš Komarčević 2021-06-02 12:06:27 +02:00 committed by Andrew Murray
parent c949d54605
commit 1c4deefe11
1 changed files with 5 additions and 5 deletions
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10
src/PIL/TiffImagePlugin.py
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@ -1558,12 +1558,12 @@ def _save(im, fp, filename):
ifd[COLORMAP] = tuple(v * 256 for v in lut)
# data orientation
stride = len(bits) * ((im.size[0] * bits[0] + 7) // 8)
rows_per_strip = im.size[1]
strip_byte_counts = stride * im.size[1]
# aim for 64 KB strips when using libtiff writer
while libtiff and strip_byte_counts > 2 ** 16 and rows_per_strip > 1:
rows_per_strip = (rows_per_strip + 1) // 2
strip_byte_counts = stride * rows_per_strip
if libtiff:
rows_per_strip = (2 ** 16 + stride - 1) // stride
else:
rows_per_strip = im.size[1]
strip_byte_counts = stride * rows_per_strip
strips_per_image = (im.size[1] + rows_per_strip - 1) // rows_per_strip
ifd[ROWSPERSTRIP] = rows_per_strip
if strip_byte_counts >= 2 ** 16: