Cutlery/calibre
1
0
Fork 0
mirror of https://github.com/kovidgoyal/calibre.git synced 2025-07-09 03:04:10 -04:00
Code Issues Packages Projects Releases Wiki Activity

EPUB output: Now works when launched from the command line with no X server on linux

Browse Source
This commit is contained in:
Kovid Goyal 2009-08-08 16:33:28 -06:00
parent 371cb45028
commit a52d470f20
1 changed files with 40 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/calibre/ebooks/oeb/transforms/rescale.py
View File

@ -6,32 +6,60 @@ __license__ = 'GPL v3'
__copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
import cStringIO
from calibre import fit_image
class RescaleImages(object):
'Rescale all images to fit inside given screen size'
def __call__(self, oeb, opts):
from PyQt4.Qt import QApplication, QImage, Qt
from calibre.gui2 import pixmap_to_data
self.oeb, self.opts, self.log = oeb, opts, oeb.log
page_width, page_height = opts.dest.width, opts.dest.height
for item in oeb.manifest:
from calibre.gui2 import is_ok_to_use_qt
self.rescale(qt=is_ok_to_use_qt())
def rescale(self, qt=True):
from PyQt4.Qt import QImage, Qt
from calibre.gui2 import pixmap_to_data
try:
from PIL import Image as PILImage
PILImage
except ImportError:
import Image as PILImage
page_width, page_height = self.opts.dest.width, self.opts.dest.height
for item in self.oeb.manifest:
if item.media_type.startswith('image'):
raw = item.data
if not raw: continue
if QApplication.instance() is None:
QApplication([])
if qt:
img = QImage(10, 10, QImage.Format_ARGB32_Premultiplied)
if not img.loadFromData(raw): continue
width, height = img.width(), img.height()
else:
f = cStringIO.StringIO(raw)
try:
im = PILImage.open(f)
except IOError:
continue
width, height = im.size
img = QImage(10, 10, QImage.Format_ARGB32_Premultiplied)
if not img.loadFromData(raw): continue
width, height = img.width(), img.height()
scaled, new_width, new_height = fit_image(width, height,
page_width, page_height)
if scaled:
self.log('Rescaling image', item.href)
img = img.scaled(new_width, new_height,
Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
item.data = pixmap_to_data(img)
if qt:
img = img.scaled(new_width, new_height,
Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
item.data = pixmap_to_data(img)
else:
im = im.resize((int(new_width), int(new_height)), PILImage.ANTIALIAS)
of = cStringIO.StringIO()
im.convert('RGB').save(of, 'JPEG')
item.data = of.getvalue()