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Viewing changes to lib/spriteutils.py

  • Committer: Edwin Grubbs
  • Date: 2010-02-03 05:18:21 UTC
  • mto: This revision was merged to the branch mainline in revision 10304.
  • Revision ID: edwin.grubbs@canonical.com-20100203051821-p7lbeyzh8il3m5ol
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lib/spriteutils.py
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import Image
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import simplejson
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MARGIN = 18
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class SpriteUtil:
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    def __init__(self):
 
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    def __init__(self, margin=150):
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        self.sprites = None
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        self.combined_image = None
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        self.positions = None
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        self.css_object = None
 
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        self.margin=margin
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    def loadCSSTemplate(self, css_file, group_name,
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                        url_prefix_substitutions=None):
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            max_width = max(width, max_width)
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            total_height += height
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        master_width = max_width
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        # Separate each image with lots of whitespace.
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        master_height = total_height + (MARGIN * len(self.sprites))
 
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        combined_image_height = (
 
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            total_height + (self.margin * len(self.sprites)))
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        transparent = (0,0,0,0)
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        master = Image.new(
 
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        combined_image = Image.new(
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            mode='RGBA',
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            size=(master_width, master_height),
 
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            size=(max_width, combined_image_height),
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            color=transparent)
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        y = 0
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        positions = {}
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        for index, sprite in enumerate(self.sprites):
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            master.paste(sprite['image'], (0, y))
 
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            try:
 
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                combined_image.paste(sprite['image'], (0, y))
 
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            except:
 
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                print >> sys.stderr, (
 
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                    "Error with image file %s" % sprite['filename'])
 
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                raise
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            # This is the position of the combined image on an HTML
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            # element. Therefore, it subtracts the position of the
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            # sprite in the file to move it to the top of the element.
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            positions[sprite['filename']] = (0, -y)
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            y += sprite['image'].size[1] + MARGIN
 
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            y += sprite['image'].size[1] + self.margin
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        self.positions = positions
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        self.combined_image = master
 
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        self.combined_image = combined_image
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    def savePNG(self, filename):
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        self.combined_image.save(filename, format='png')
 
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        self.combined_image.save(filename, format='png', optimize=True)
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    def savePositioning(self, filename):
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        simplejson.dump(self.positions, fp=open(filename, 'w'), indent=4)