Exemple #1
0
 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()
Exemple #2
0
 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()
Exemple #3
0
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!')
Exemple #4
0
def compress_worker(input_queue, output_queue, jpeg_quality):
    while True:
        task = input_queue.get()
        if task is None:
            break
        book_id, path = task
        try:
            if jpeg_quality >= 100:
                stderr = optimize_jpeg(path)
            else:
                stderr = encode_jpeg(path, jpeg_quality)
        except Exception:
            import traceback
            stderr = traceback.format_exc()
        if stderr:
            output_queue.put((book_id, stderr))
        else:
            try:
                sz = os.path.getsize(path)
            except OSError as err:
                sz = str(err)
            output_queue.put((book_id, sz))