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PDF Output: Use less memory when writing out the PDF file

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This commit is contained in:
Kovid Goyal 2012-09-02 00:44:18 +05:30
parent 4e20f776bc
commit def42a1da3
1 changed files with 8 additions and 3 deletions
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11
src/calibre/ebooks/pdf/writer.py
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@ -15,11 +15,12 @@ from PyQt4.Qt import (QEventLoop, QObject, QPrinter, QSizeF, Qt, QPainter,
QPixmap, QTimer, pyqtProperty, QString, QSize)
from PyQt4.QtWebKit import QWebView, QWebPage, QWebSettings
from calibre.constants import filesystem_encoding
from calibre.ptempfile import PersistentTemporaryDirectory
from calibre.ebooks.pdf.pageoptions import (unit, paper_size, orientation)
from calibre.ebooks.pdf.outline_writer import Outline
from calibre.ebooks.metadata import authors_to_string
from calibre.ptempfile import PersistentTemporaryFile
from calibre.ptempfile import PersistentTemporaryFile, TemporaryFile
from calibre import (__appname__, __version__, fit_image, isosx, force_unicode)
from calibre.ebooks.oeb.display.webview import load_html
@ -350,8 +351,12 @@ class PDFWriter(QObject): # {{{
if self.metadata.tags:
self.doc.keywords = self.metadata.tags
self.outline(self.doc)
raw = self.doc.write()
self.out_stream.write(raw)
with TemporaryFile(u'pdf_out.pdf') as tf:
if isinstance(tf, unicode):
tf = tf.encode(filesystem_encoding)
self.doc.save(tf)
with open(tf, 'rb') as src:
shutil.copyfileobj(src, self.out_stream)
self.render_succeeded = True
finally:
self._delete_tmpdir()