From c37c5436b0870d91a6df3358e30c9509a2e63726 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 19 Apr 2009 20:12:25 -0700
Subject: [PATCH] EPUB Input plugin now rasterizes cover and sets a
 type='titlepage' guide element to point to the HTML cover. The HTML cover is
 removed from the spine.

---
 src/calibre/ebooks/__init__.py   |  5 ++++-
 src/calibre/ebooks/epub/input.py | 38 +++++++++++++++++++++++++++++++-
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/calibre/ebooks/__init__.py b/src/calibre/ebooks/__init__.py
index 26d2394818..79f4f7631e 100644
--- a/src/calibre/ebooks/__init__.py
+++ b/src/calibre/ebooks/__init__.py
@@ -59,7 +59,10 @@ class HTMLRenderer(object):
 
 def render_html(path_to_html, width=590, height=750):
     from PyQt4.QtWebKit import QWebPage
-    from PyQt4.Qt import QEventLoop, QPalette, Qt, SIGNAL, QUrl, QSize
+    from PyQt4.Qt import QEventLoop, QPalette, Qt, SIGNAL, QUrl, QSize, \
+                         QApplication
+    if QApplication.instance() is None:
+        QApplication([])
     path_to_html = os.path.abspath(path_to_html)
     with CurrentDir(os.path.dirname(path_to_html)):
         page = QWebPage()
diff --git a/src/calibre/ebooks/epub/input.py b/src/calibre/ebooks/epub/input.py
index 10bb321a11..919416ffdc 100644
--- a/src/calibre/ebooks/epub/input.py
+++ b/src/calibre/ebooks/epub/input.py
@@ -51,6 +51,39 @@ class EPUBInput(InputFormatPlugin):
             traceback.print_exc()
         return False
 
+    @classmethod
+    def rationalize_cover(self, opf):
+        guide_cover, guide_elem = None, None
+        for guide_elem in opf.iterguide():
+            if guide_elem.get('type', '').lower() == 'cover':
+                guide_cover = guide_elem.get('href', '')
+                break
+        if not guide_cover:
+            return
+        spine = list(opf.iterspine())
+        if not spine:
+            return
+        idref = spine[0].get('idref', '')
+        manifest = list(opf.itermanifest())
+        if not manifest:
+            return
+        if manifest[0].get('id', False) != idref:
+            return
+        spine[0].getparent().remove(spine[0])
+        guide_elem.set('href', 'calibre_raster_cover.jpg')
+        for elem in list(opf.iterguide()):
+            if elem.get('type', '').lower() == 'titlepage':
+                elem.getparent().remove(elem)
+        from calibre.ebooks.oeb.base import OPF
+        t = etree.SubElement(guide_elem.getparent(), OPF('reference'))
+        t.set('type', 'titlepage')
+        t.set('href', guide_cover)
+        t.set('title', 'Title Page')
+        from calibre.ebooks import render_html
+        open('calibre_raster_cover.jpg', 'wb').write(
+                render_html(guide_cover).data)
+
+
     def convert(self, stream, options, file_ext, log, accelerators):
         from calibre.utils.zipfile import ZipFile
         from calibre import walk
@@ -75,14 +108,17 @@ class EPUBInput(InputFormatPlugin):
 
         opf = os.path.relpath(opf, os.getcwdu())
         parts = os.path.split(opf)
+        opf = OPF(opf, os.path.dirname(os.path.abspath(opf)))
+
         if len(parts) > 1:
             delta = '/'.join(parts[:-1])+'/'
-            opf = OPF(opf, os.path.dirname(os.path.abspath(opf)))
             for elem in opf.itermanifest():
                 elem.set('href', delta+elem.get('href'))
             for elem in opf.iterguide():
                 elem.set('href', delta+elem.get('href'))
 
+        self.rationalize_cover(opf)
+
         with open('content.opf', 'wb') as nopf:
             nopf.write(opf.render())