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resize image in the thread not when adding the image

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This commit is contained in:
Andreas Preikschat 2011-06-21 13:37:28 +02:00
parent dbef87021c
commit 11cb39d2dc
2 changed files with 29 additions and 20 deletions
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43
openlp/core/lib/imagemanager.py
View File

@ -53,15 +53,17 @@ class ImageThread(QtCore.QThread):
"""
Run the thread.
"""
self.imageManager.process()
self.imageManager._process()
class Image(object):
name = ''
path = ''
dirty = True
image = None
image_bytes = None
def __init__(self, name='', path=''):
self.name = name
self.path = path
self.dirty = True
self.image = None
self.image_bytes = None
self.priority = False
class ImageManager(QtCore.QObject):
@ -92,7 +94,6 @@ class ImageManager(QtCore.QObject):
for key in self._cache.keys():
image = self._cache[key]
image.dirty = True
image.image = resize_image(image.path, self.width, self.height)
self._cache_dirty = True
# only one thread please
if not self._thread_running:
@ -103,6 +104,10 @@ class ImageManager(QtCore.QObject):
Return the Qimage from the cache
"""
log.debug(u'get_image %s' % name)
if not self._cache[name].image_bytes:
while self._cache[name].dirty:
log.debug(u'get_image - waiting')
time.sleep(0.1)
return self._cache[name].image
def get_image_bytes(self, name):
@ -131,10 +136,7 @@ class ImageManager(QtCore.QObject):
"""
log.debug(u'add_image %s:%s' % (name, path))
if not name in self._cache:
image = Image()
image.name = name
image.path = path
image.image = resize_image(path, self.width, self.height)
image = Image(name, path)
self._cache[name] = image
else:
log.debug(u'Image in cache %s:%s' % (name, path))
@ -143,29 +145,30 @@ class ImageManager(QtCore.QObject):
if not self._thread_running:
self.image_thread.start()
def process(self):
def _process(self):
"""
Controls the processing called from a QThread
Controls the processing called from a ``QtCore.QThread``.
"""
log.debug(u'process - started')
log.debug(u'_process - started')
self._thread_running = True
self.clean_cache()
self._clean_cache()
# data loaded since we started ?
while self._cache_dirty:
log.debug(u'process - recycle')
self.clean_cache()
log.debug(u'_process - recycle')
self._clean_cache()
self._thread_running = False
log.debug(u'process - ended')
log.debug(u'_process - ended')
def clean_cache(self):
def _clean_cache(self):
"""
Actually does the work.
"""
log.debug(u'clean_cache')
log.debug(u'_clean_cache')
# we will clean the cache now
self._cache_dirty = False
for key in self._cache.keys():
image = self._cache[key]
if image.dirty:
image.image = resize_image(image.path, self.width, self.height)
image.image_bytes = image_to_byte(image.image)
image.dirty = False

6
openlp/core/ui/slidecontroller.py
View File

@ -582,6 +582,9 @@ class SlideController(QtGui.QWidget):
Loads a ServiceItem into the system from ServiceManager
Display the slide number passed
"""
import time
import datetime
start = time.time()
log.debug(u'processManagerItem live = %s' % self.isLive)
self.onStopLoop()
old_item = self.serviceItem
@ -631,7 +634,9 @@ class SlideController(QtGui.QWidget):
if framenumber == slideno:
self.serviceItem.bg_image_bytes = \
self.imageManager.get_image_bytes(frame[u'title'])
print u' start', frame[u'title']
image = self.imageManager.get_image(frame[u'title'])
print u' end', frame[u'title']
label.setPixmap(QtGui.QPixmap.fromImage(image))
self.previewListWidget.setCellWidget(framenumber, 0, label)
slideHeight = width * self.parent().renderer.screen_ratio
@ -668,6 +673,7 @@ class SlideController(QtGui.QWidget):
self.onMediaClose()
Receiver.send_message(u'slidecontroller_%s_started' % self.typePrefix,
[serviceItem])
print unicode(datetime.timedelta(seconds=time.time() - start))
def __updatePreviewSelection(self, slideno):
"""