Docsplit 0.3.4

Author: jashkenas

index.html

@@ -279,6 +279,13 @@ <h2 id="internals">Internals</h2>
 
     <h2 id="changes">Change Log</h2>
 
+    <p>
+      <b class="header">0.3.4</b><br />
+      Adding a suggested optimization from the GraphicsMagick list -- only ever
+      generate one page image per GraphicsMagick call. Saves large amounts of
+      disk space for tempfiles on long documents.
+    </p>
+    
     <p>
       <b class="header">0.3.3</b><br />
       Start using the MAGICK_TMPDIR environment variable to prevent parallel

lib/docsplit/image_extractor.rb

@@ -23,6 +23,10 @@ def extract(pdfs, options)
     end
 
     # Convert a single PDF into page images at the specified size and format.
+    # If `--rolling`, and we have a previous image at a larger size to work with,
+    # we simply downsample that image, instead of re-rendering the entire PDF.
+    # Now we generate one page at a time, a counterintuitive opimization
+    # suggested by the GraphicsMagick list, that seems to work quite well.
     def convert(pdf, size, format, previous=nil)
       tempdir   = Dir.mktmpdir
       basename  = File.basename(pdf, File.extname(pdf))
@@ -88,7 +92,7 @@ def page_list(pages)
         else
           range.to_i
         end
-      }.flatten.sort
+      }.flatten.uniq.sort
     end
 
   end