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PMLZ Output: Reduce image depth and size by default to accommodate Dropbook. Includes option to output un-modified images.

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This commit is contained in:
John Schember 2010-12-02 18:43:50 -05:00
parent 8032890d0f
commit 1f91663c22
1 changed files with 13 additions and 3 deletions
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14
src/calibre/ebooks/pml/output.py
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@ -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():
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')