From 4024af4373eb6755075aa3c5f259e511d0f1b5a4 Mon Sep 17 00:00:00 2001
From: zuber <marek@stepniowski.com>
Date: Mon, 31 Aug 2009 12:10:13 +0200
Subject: [PATCH] =?utf8?q?Dodanie=20skryptu=20imgconv.py=20do=20konwertowa?=
 =?utf8?q?nia=20obrazk=C3=B3w=20(uwaga:=20skrypt=20wymaga=20zewn=C4=99trzn?=
 =?utf8?q?ego=20programu=20pngnq,=20patrz=20README.txt).?=
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---
 README.txt |  2 +-
 imgconv.py | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100755 imgconv.py

diff --git a/README.txt b/README.txt
index cb42e711..6479c79e 100644
--- a/README.txt
+++ b/README.txt
@@ -4,7 +4,7 @@ Zależności
  * [Django 1.1](http://djangoproject.com/)
  * [Mercurial 1.3.1](http://www.selenic.com/mercurial/)
  * [librarian 1.1](http://redmine.nowoczesnapolska.org.pl/projects/show/librarian)
-
+ * [pngnq](http://pngnq.sourceforge.net/) (wymagany przez skrypt imgconv.py)
 
 Moduły
 ======
diff --git a/imgconv.py b/imgconv.py
new file mode 100755
index 00000000..e00b9c8e
--- /dev/null
+++ b/imgconv.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+import sys
+import os
+from os.path import splitext, dirname
+from PIL import Image, ImageFilter, ImageEnhance, ImageOps
+
+
+def resize(image, max_width, max_height):
+    """Resize image so it's not wider than max_width and not higher than max_height."""
+    width, height = image.size
+    ratio = max(1.0, float(width) / max_width, float(height) / max_height)
+    new_width, new_height = int(width / ratio), int(height / ratio)
+    return image.resize((new_width, new_height), Image.ANTIALIAS)
+
+
+def crop(image, ratio, from_right=False):
+    """Crop image to ratio of current width."""
+    width, height = image.size
+    new_width = width * ratio
+    if from_right:
+        bounds = (int(width - new_width), 0, int(width), int(height))
+    else:
+        bounds = (0, 0, int(new_width), int(height))
+    image = image.crop(bounds)
+    image.load()
+    return image
+
+
+def ratio(image):
+    """Return width to height ratio of image."""
+    width, height = image.size
+    return float(width) / height
+    
+    
+for file_name in sys.argv[1:]:
+    try:
+        os.mkdir('output')
+    except:
+        pass
+    base_name, ext = splitext(file_name)
+    try:
+        image = Image.open(file_name)
+    except IOError, e:
+        sys.stderr.write('\nerror:%s:%s\n' % (file_name, e.message))
+        continue
+    
+    # Check ratio
+    if ratio(image) > 1:
+        images = [crop(image, 0.5), crop(image, 0.5, True)]
+    else:
+        images = [image]
+    
+    for i, image in enumerate(images):
+        image = image.filter(ImageFilter.SHARPEN)
+        
+        image = image.filter(ImageFilter.MinFilter)
+        def convert(i):
+            if i > 48:
+                return 255
+            return i
+        image = image.point(convert)
+        image = ImageOps.autocontrast(image, cutoff=95)
+        image = image.convert('L')
+        image = image.filter(ImageFilter.SHARPEN)
+        
+        # Save files
+        small_image = resize(image, 480, 720)
+        small_image_file_name = '%s.small.%d.png' % (base_name, i)
+        small_image.save(small_image_file_name, optimize=True, bits=6)
+        os.system('pngnq -n 8 -e .png -d output -f "%s"' % small_image_file_name)
+        os.remove(small_image_file_name)
+        
+        big_image = resize(image, 960, 1440)
+        big_image_file_name = '%s.big.%d.png' % (base_name, i)
+        big_image.save(big_image_file_name, optimize=True, bits=6)
+        os.system('pngnq -n 8 -e .png -d output -f "%s"' % big_image_file_name)
+        os.remove(big_image_file_name)
+        
+    sys.stderr.write('.')
-- 
2.20.1