Merge lp:~sil/lernid/poppler-gonna-make-you-poppler into lp:lernid

[Stuart Langridge]

[Stuart Langridge (sil)]

Use libpoppler instead of shelling out to Ghostscript, because we are a Python Gnome application and not, for example, something written with Athena in 1987

=== modified file 'bin/lernid'
--- bin/lernid	2009-12-28 11:35:14 +0000
+++ bin/lernid	2010-01-04 23:55:20 +0000
@@ -34,6 +34,8 @@
 import subprocess
 import re
 import tempfile
+import poppler
+from gtk.gdk import Pixbuf, COLORSPACE_RGB
 
 # Check if we are working in the source tree or from the installed 
 # package and mangle the python path accordingly
@@ -180,15 +182,17 @@
         self.connect_dialog(None)
 
     def change_slide(self, slidenumber):
-        firstpage = "-dFirstPage=" + str(slidenumber)
-        lastpage = "-dLastPage=" + str(slidenumber)
-        outputfile = "-sOutputFile=" + self.tempslide.name
-        slidedeck = os.path.join(self.lerniddatafolder, "slides.pdf")
-        
-        print 'output file', outputfile
-        subprocess.Popen(['gs', '-dNOPAUSE', firstpage, lastpage, '-dBATCH', '-sDEVICE=jpeg', outputfile, '-r200', slidedeck]).wait()
-
-        self.master_slide = gtk.gdk.pixbuf_new_from_file(self.tempslide.name)
+        try:
+            slide_url = "file://%s/slides.pdf" % os.path.realpath(self.lerniddatafolder)
+            pdf = poppler.document_new_from_file(slide_url, None)
+            pg = pdf.get_page(int(slidenumber) - 1)
+            w, h = pg.get_size()
+            pb = Pixbuf(COLORSPACE_RGB,False, 8, int(w), int(h))
+            pg.render_to_pixbuf(0,0,8,11,1,0,pb)
+        except:
+            logging.debug("Something went wrong when loading slide %s" % slidenumber)
+            return
+        self.master_slide = pb
         self.slide_resize()
         self.tabs.set_current_page(self.TAB_SCHEDULE)