def optimize(name):
if abort is not None and abort.is_set():
return
if error_occurred.is_set():
return
try:
i = next(num)
if progress is not None:
progress(i, _('Optimizing %s') % name)
srcpath = os.path.join(report.path, name)
ext = srcpath.rpartition('.')[-1].lower()
if ext == 'png':
optimize_png(srcpath)
elif ext in ('jpg', 'jpeg'):
optimize_jpeg(srcpath)
except Exception:
return sys.exc_info()
def optimize(name):
if abort is not None and abort.is_set():
return
if error_occurred.is_set():
return
try:
i = next(num)
if progress is not None:
progress(i, _('Optimizing %s') % name)
srcpath = os.path.join(report.path, name)
ext = srcpath.rpartition('.')[-1].lower()
if ext == 'png':
optimize_png(srcpath)
elif ext in ('jpg', 'jpeg'):
optimize_jpeg(srcpath)
except Exception:
return sys.exc_info()
def process_image(self, data):
if not self.process_images:
return data
try:
return mobify_image(data)
except Exception:
if 'png' != what(None, data):
raise
with PersistentTemporaryFile(suffix='.png') as pt:
pt.write(data)
try:
from calibre.utils.img import optimize_png
optimize_png(pt.name)
data = lopen(pt.name, 'rb').read()
finally:
os.remove(pt.name)
return mobify_image(data)
def process_image(self, data):
if not self.process_images:
return data
func = mobify_image if self.opts.mobi_keep_original_images else rescale_image
try:
return func(data)
except Exception:
if 'png' != what(None, data):
raise
with PersistentTemporaryFile(suffix='.png') as pt:
pt.write(data)
try:
from calibre.utils.img import optimize_png
optimize_png(pt.name)
data = lopen(pt.name, 'rb').read()
finally:
os.remove(pt.name)
return func(data)
def process_image(self, data):
if not self.process_images:
return data
func = mobify_image if self.opts.mobi_keep_original_images else rescale_image
try:
return ensure_jpeg_has_jfif(func(data))
except Exception:
if 'png' != what(None, data):
raise
with PersistentTemporaryFile(suffix='.png') as pt:
pt.write(data)
try:
from calibre.utils.img import optimize_png
optimize_png(pt.name)
data = lopen(pt.name, 'rb').read()
finally:
os.remove(pt.name)
return func(data)
def process_image(self, data):
if not self.process_images:
return data
func = mobify_image if self.opts.mobi_keep_original_images else rescale_image
try:
return func(data)
except Exception:
from calibre.utils.magick.draw import identify_data
if 'png' != identify_data(data)[-1].lower():
raise
with PersistentTemporaryFile(suffix='.png') as pt:
pt.write(data)
try:
from calibre.utils.img import optimize_png
optimize_png(pt.name)
data = open(pt.name, 'rb').read()
finally:
os.remove(pt.name)
return func(data)
def test_image_compression():
from calibre.utils.img import optimize_png, optimize_jpeg, encode_jpeg
with TemporaryDirectory() as tdir, CurrentDir(tdir):
shutil.copyfile(I('devices/kindle.jpg'), 'test.jpg')
ret = optimize_jpeg('test.jpg')
if ret is not None:
raise SystemExit(ret)
ret = encode_jpeg('test.jpg')
if ret is not None:
raise SystemExit(ret)
shutil.copyfile(I('lt.png'), 'test.png')
ret = optimize_png('test.png')
if ret is not None:
raise SystemExit(ret)
print('Image compression OK!')