PML Output: Fix #7742 (PMLZ output not good enough for DropBook) [reduce image sizes so they work with Dropbook]

src/calibre/ebooks/pml/output.py

@@ -35,6 +35,12 @@ class PMLOutput(OutputFormatPlugin):
         OptionRecommendation(name='inline_toc',
             recommended_value=False, level=OptionRecommendation.LOW,
             help=_('Add Table of Contents to beginning of the book.')),
+        OptionRecommendation(name='full_image_depth',
+            recommended_value=False, level=OptionRecommendation.LOW,
+            help=_('Do not reduce the size or bit depth of images. Images ' \
+                   'have their size and depth reduced by default to accommodate ' \
+                   'applications that can not convert images on their ' \
+                   'own such as Dropbook.')),
     ])
 
     def convert(self, oeb_book, output_path, input_plugin, opts, log):
@@ -44,16 +50,20 @@ class PMLOutput(OutputFormatPlugin):
             with open(os.path.join(tdir, 'index.pml'), 'wb') as out:
                 out.write(pml.encode(opts.output_encoding, 'replace'))
 
-            self.write_images(oeb_book.manifest, pmlmlizer.image_hrefs, tdir)
+            self.write_images(oeb_book.manifest, pmlmlizer.image_hrefs, tdir, opts)
 
             log.debug('Compressing output...')
             pmlz = ZipFile(output_path, 'w')
             pmlz.add_dir(tdir)
 
-    def write_images(self, manifest, image_hrefs, out_dir):
+    def write_images(self, manifest, image_hrefs, out_dir, opts):
         for item in manifest:
             if item.media_type in OEB_RASTER_IMAGES and item.href in image_hrefs.keys():
-                im = Image.open(cStringIO.StringIO(item.data))
+                if opts.full_image_depth:
+                    im = Image.open(cStringIO.StringIO(item.data))
+                else:
+                    im = Image.open(cStringIO.StringIO(item.data)).convert('P')
+                    im.thumbnail((300,300), Image.ANTIALIAS)
 
                 data = cStringIO.StringIO()
                 im.save(data, 'PNG')

src/calibre/gui2/convert/pml_output.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+
+__license__ = 'GPL 3'
+__copyright__ = '2009, John Schember <john@nachtimwald.com>'
+__docformat__ = 'restructuredtext en'
+
+from calibre.gui2.convert.pmlz_output_ui import Ui_Form
+from calibre.gui2.convert import Widget
+
+format_model = None
+
+class PluginWidget(Widget, Ui_Form):
+
+    TITLE = _('PMLZ Output')
+    HELP = _('Options specific to')+' PMLZ '+_('output')
+    COMMIT_NAME = 'pmlz_output'
+    ICON = I('mimetypes/unknown.png')
+
+    def __init__(self, parent, get_option, get_help, db=None, book_id=None):
+        Widget.__init__(self, parent, ['inline_toc', 'full_image_depth'])
+        self.db, self.book_id = db, book_id
+        self.initialize_options(get_option, get_help, db, book_id)

src/calibre/gui2/convert/pmlz_output.ui

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Form</class>
+ <widget class="QWidget" name="Form">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="2" column="0">
+    <spacer name="verticalSpacer">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>246</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item row="0" column="0">
+    <widget class="QCheckBox" name="opt_inline_toc">
+     <property name="text">
+      <string>&amp;Inline TOC</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0">
+    <widget class="QCheckBox" name="opt_full_image_depth">
+     <property name="text">
+      <string>Do not reduce image size and depth</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>