I forgot to take of the _t function, so the first lines should be:
CROSS = 'Cross'
ROUNDED = 'Rounded'
SQUARE = 'Square'
Stani schreef:
> In PIL this is easy.
>
> The following code preferably uses cache (just a simple python
> dictionary) to avoid the overhead of generating the same transparency
> masks. So typical use would be:
>
> cache = {}
> for image in images:
> thumbnail = image_round(image.thumbnail(size, filter), cache, radius)
>
> Here is the code for rounded corners:
>
> # Rounded corners
> # (c) 2008 www.stani.be
> # License: same as PIL
>
> CROSS = _t('Cross')
> ROUNDED = _t('Rounded')
> SQUARE = _t('Square')
>
> CORNERS = [ROUNDED,SQUARE,CROSS]
> CORNER_ID = 'rounded_corner_r%d_f%d'
> CROSS_POS = (CROSS,CROSS,CROSS,CROSS)
> ROUNDED_POS = (ROUNDED,ROUNDED,ROUNDED,ROUNDED)
> ROUNDED_RECTANGLE_ID = 'rounded_rectangle_r%d_f%d_s%s_p%s'
>
> def round_image(image,cache={},radius=100,fill=255,pos=ROUNDED_POS,
> back_colour='#FFFFFF'):
> if image.mode != 'RGBA':
> image = image.convert('RGBA')
> mask = create_rounded_rectangle(image.size,cache,radius,fill,pos)
> image.paste(Image.new('RGB',image.size,back_colour),(0,0),
> ImageChops.invert(mask))
> image.putalpha(mask)
> return image
>
> def create_corner(radius=100,fill=255,factor=2):
> corner = Image.new('L',(factor*radius,factor*radius),0)
> draw = ImageDraw.Draw(corner)
> draw.pieslice((0,0,2*factor*radius,2*factor*radius),180,270,fill=fill)
> corner = corner.resize((radius,radius),Image.ANTIALIAS)
> return corner
>
> def create_rounded_rectangle(size=(600,400),cache={},radius=100,fill=255,
> pos=ROUNDED_POS):
> #rounded_rectangle
> im_x, im_y = size
> rounded_rectangle_id = ROUNDED_RECTANGLE_ID%(radius,fill,size,pos)
> if cache.has_key(rounded_rectangle_id):
> return cache[rounded_rectangle_id]
> else:
> #cross
> cross_id = ROUNDED_RECTANGLE_ID%(radius,fill,size,CROSS_POS)
> if cache.has_key(cross_id):
> cross = cache[cross_id]
> else:
> cross = cache[cross_id] = Image.new('L',size,0)
> draw = ImageDraw.Draw(cross)
> draw.rectangle((radius,0,im_x-radius,im_y),fill=fill)
> draw.rectangle((0,radius,im_x,im_y-radius),fill=fill)
> if pos==CROSS_POS:
> return cross
> #corner
> corner_id = CORNER_ID%(radius,fill)
> if cache.has_key(corner_id):
> corner = cache[corner_id]
> else:
> corner = cache[corner_id] = create_corner(radius,fill)
> #rounded rectangle
> rectangle = Image.new('L',(radius,radius),255)
> rounded_rectangle = cross.copy()
> for index, angle in enumerate(pos):
> if angle == CROSS:
> break
> if angle == ROUNDED:
> element = corner
> else:
> element = rectangle
> if index%2:
> x = im_x-radius
> element = element.transpose(Image.FLIP_LEFT_RIGHT)
> else:
> x = 0
> if index < 2:
> y = 0
> else:
> y = im_y-radius
> element = element.transpose(Image.FLIP_TOP_BOTTOM)
> rounded_rectangle.paste(element,(x,y))
> cache[rounded_rectangle_id] = rounded_rectangle
> return rounded_rectangle
>
>
> Alex K schreef:
>> Hello,
>>
>> Would anyone know how to generate thumbnails with rounded corners
>> using PIL? I'm also considering imagemagick if PIL turns out not to be
>> appropriate for the task.
>>
>> Thank you so much,
>>
>> Alex
>> _______________________________________________
>> Image-SIG maillist - Image-SIG@python.org
>> http://mail.python.org/mailman/listinfo/image-sig
>>
>
_______________________________________________
Image-SIG maillist - Image-SIG@python.org
http://mail.python.org/mailman/listinfo/image-sig
