--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mysite/photologue/utils/reflection.py	Mon Apr 06 03:10:59 2009 +0000
@@ -0,0 +1,93 @@
+""" Function for generating web 2.0 style image reflection effects.
+
+Copyright (c) 2007, Justin C. Driscoll
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    3. Neither the name of reflection.py nor the names of its contributors may be used
+       to endorse or promote products derived from this software without
+       specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+
+try:
+    import Image
+    import ImageColor                    
+except ImportError:
+    try:
+        from PIL import Image
+        from PIL import ImageColor
+    except ImportError:
+        raise ImportError("The Python Imaging Library was not found.")
+    
+    
+def add_reflection(im, bgcolor="#00000", amount=0.4, opacity=0.6):
+    """ Returns the supplied PIL Image (im) with a reflection effect
+    
+    bgcolor  The background color of the reflection gradient
+    amount   The height of the reflection as a percentage of the orignal image
+    opacity  The initial opacity of the reflection gradient
+    
+    Originally written for the Photologue image management system for Django
+    and Based on the original concept by Bernd Schlapsi
+    
+    """
+    # convert bgcolor string to rgb value
+    background_color = ImageColor.getrgb(bgcolor)
+    
+    # copy orignial image and flip the orientation
+    reflection = im.copy().transpose(Image.FLIP_TOP_BOTTOM)
+    
+    # create a new image filled with the bgcolor the same size
+    background = Image.new("RGB", im.size, background_color)
+    
+    # calculate our alpha mask
+    start = int(255 - (255 * opacity)) # The start of our gradient
+    steps = int(255 * amount) # the number of intermedite values
+    increment = (255 - start) / float(steps)
+    mask = Image.new('L', (1, 255))
+    for y in range(255):
+        if y < steps:
+            val = int(y * increment + start)
+        else:
+            val = 255
+        mask.putpixel((0, y), val)
+    alpha_mask = mask.resize(im.size)    
+    
+    # merge the reflection onto our background color using the alpha mask
+    reflection = Image.composite(background, reflection, alpha_mask)
+    
+    # crop the reflection
+    reflection_height = int(im.size[1] * amount)
+    reflection = reflection.crop((0, 0, im.size[0], reflection_height))
+    
+    # create new image sized to hold both the original image and the reflection
+    composite = Image.new("RGB", (im.size[0], im.size[1]+reflection_height), background_color)
+    
+    # paste the orignal image and the reflection into the composite image
+    composite.paste(im, (0, 0))
+    composite.paste(reflection, (0, im.size[1]))
+    
+    # return the image complete with reflection effect
+    return composite
+            
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