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Add crop_image()

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This commit is contained in:
Kovid Goyal 2016-05-09 20:25:19 +05:30
parent bd822c7ff2
commit 0fbcabad73
1 changed files with 14 additions and 0 deletions
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14
src/calibre/utils/img.py
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@ -146,6 +146,20 @@ def scale_image(data, width=60, height=80, compression_quality=70, as_png=False,
w, h = img.width(), img.height() w, h = img.width(), img.height()
return w, h, image_to_data(img, compression_quality=compression_quality, fmt=fmt) return w, h, image_to_data(img, compression_quality=compression_quality, fmt=fmt)
def crop_image(img, x, y, width, height):
'''
Return the specified section of the image.
:param x, y: The top left corner of the crop box
:param width, height: The width and height of the crop box. Note that if
the crop box exceeds the source images dimensions, width and height will be
auto-truncated.
'''
img = image_from_data(img)
width = min(width, img.width() - x)
height = min(height, img.height() - y)
return img.copy(x, y, width, height)
def normalize_format_name(fmt): def normalize_format_name(fmt):
fmt = fmt.lower() fmt = fmt.lower()
if fmt == 'jpg': if fmt == 'jpg':