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Make sure the entire focal point is in the crop

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This commit is contained in:
Karl Hobley 2014-09-16 15:10:40 +01:00
parent b68c845a66
commit 4757c1633c
1 changed files with 40 additions and 0 deletions
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40
wagtail/wagtailimages/backends/base.py
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@ -202,6 +202,46 @@ class BaseImageBackend(object):
right = crop_x + crop_width / 2
bottom = crop_y + crop_height / 2
# Make sure the entire focal point is in the crop box
if focal_point is not None:
focal_point_left = focal_point.x - focal_point.width / 2
focal_point_top = focal_point.y - focal_point.height / 2
focal_point_right = focal_point.x + focal_point.width / 2
focal_point_bottom = focal_point.y + focal_point.height / 2
if left > focal_point_left:
right -= left - focal_point_left
left = focal_point_left
if top > focal_point_top:
bottom -= top - focal_point_top
top = focal_point_top
if right < focal_point_right:
left += focal_point_right - right;
right = focal_point_right
if bottom < focal_point_bottom:
top += focal_point_bottom - bottom;
bottom = focal_point_bottom
# Don't allow the crop box to go over the image boundary
if left < 0:
right -= left
left = 0
if top < 0:
bottom -= top
top = 0
if right > im_width:
left -= right - im_width
right = im_width
if bottom > im_height:
top -= bottom - im_height
bottom = im_height
# Crop!
return self.resize_to_min(self.crop(image, Rect(left, top, right, bottom)), size)