def testWrite(self):
temporaryFile = QTemporaryFile(QDir.tempPath() + "/pdfwriter_test_XXXXXX.pdf")
self.assertTrue(temporaryFile.open())
pdfWriter = QPdfWriter(temporaryFile)
pdfWriter.setPageLayout(QPageLayout(QPageSize(QPageSize.A4), QPageLayout.Portrait, QMarginsF(10, 10, 10, 10)))
doc = QTextDocument("Some text")
doc.print_(pdfWriter)
temporaryFile.close()
self.assertTrue(temporaryFile.size() > 0)
def __init__(self, parent=None):
super(Form, self).__init__(parent)
self.svg_style = SvgStyle()
self.temp_svg_file = QTemporaryFile()
if not self.temp_svg_file.open(): # need to obtain temp file name
raise RuntimeError('Cannot create temporary file for svg object')
self.temp_svg_file.close()
self.setWindowTitle(u'Круговая диаграмма')
self.model = CustomTableModel()
self.table_view = QTableView()
self.table_view.horizontalHeader().setSectionResizeMode(QHeaderView.ResizeToContents)
self.table_view.verticalHeader().setSectionResizeMode(QHeaderView.ResizeToContents)
self.widget_svg = QSvgWidget()
self.widget_style = StyleWidget()
self.widget_style.style_changed.connect(self.style_updated)
# central widget layout
layout = QHBoxLayout()
# size = QSizePolicy(QSizePolicy.Preferred, QSizePolicy.Preferred)
# size.setHorizontalStretch(1)
# self.table_view.setSizePolicy(size)
layout.addWidget(self.table_view)
layout.addWidget(self.widget_svg)
layout.addWidget(self.widget_style)
self.widget_svg.setFixedSize(500, 500)
widget_central = QWidget()
widget_central.setLayout(layout)
self.setCentralWidget(widget_central)
# main menu
self.menu = self.menuBar()
self.menu_file = self.menu.addMenu("File")
# load QAction
action_load = QAction('Open', self)
action_load.setShortcut(QKeySequence.Open)
action_load.triggered.connect(self.load_data)
self.menu_file.addAction(action_load)
self.statusBar()
# exit QAction
action_exit = QAction('Exit', self)
action_exit.setShortcut(QKeySequence.Quit)
action_exit.triggered.connect(self.close)
self.menu_file.addAction(action_exit)
def testCallFunction(self):
f = QTemporaryFile()
self.assertTrue(f.open())
fileName = f.fileName()
f.close()
f = QFile(fileName)
self.assertEqual(f.open(QIODevice.Truncate | QIODevice.Text | QIODevice.ReadWrite), True)
om = f.openMode()
self.assertEqual(om & QIODevice.Truncate, QIODevice.Truncate)
self.assertEqual(om & QIODevice.Text, QIODevice.Text)
self.assertEqual(om & QIODevice.ReadWrite, QIODevice.ReadWrite)
self.assertTrue(om == QIODevice.Truncate | QIODevice.Text | QIODevice.ReadWrite)
f.close()
def testDictionary(self):
confFile = QTemporaryFile(QDir.tempPath() + '/pysidebug829_XXXXXX.ini')
confFile.setAutoRemove(False)
self.assertTrue(confFile.open())
confFile.close()
self._confFileName = confFile.fileName()
del confFile
s = QSettings(self._confFileName, QSettings.IniFormat)
self.assertEqual(s.status(), QSettings.NoError)
# Save value
s.setValue('x', {1: 'a'})
s.sync()
self.assertEqual(s.status(), QSettings.NoError)
del s
# Restore value
s = QSettings(self._confFileName, QSettings.IniFormat)
self.assertEqual(s.status(), QSettings.NoError)
self.assertEqual(s.value('x'), {1: 'a'})
def __init__(self, filename, image, parent=None):
super(ThumbWidget, self).__init__(parent)
temp_file = QTemporaryFile()
if temp_file.open():
output = subprocess.check_output(
[exiftool_exe(), '-b', '-ThumbnailImage', filename])
temp_name = temp_file.fileName()
with open(temp_name, 'wb') as file:
file.write(output)
thumb = cv.imread(temp_name, cv.IMREAD_COLOR)
if thumb is None:
self.show_error(self.tr('Thumbnail image not found!'))
return
# resized = cv.resize(image, thumb.shape[:-1][::-1], interpolation=cv.INTER_AREA)
resized = cv.resize(thumb,
image.shape[:-1][::-1],
interpolation=cv.INTER_LANCZOS4)
diff = cv.absdiff(image, resized)
# image_aspect = image.shape[1] / image.shape[0]
# thumb_aspect = thumb.shape[1] / thumb.shape[0]
# if thumb_aspect < image_aspect:
# shape = (thumb.shape[1] // image_aspect, thumb.shape[1])
# elif thumb_aspect > image_aspect:
# shape = (thumb.shape[0], thumb.shape[0] * image_aspect)
# else:
# shape = thumb.shape
# resized = cv.resize(image, shape, None, 0, 0, interpolation=cv.INTER_AREA)
# top = (thumb.shape[0] - resized.shape[0]) / 2
# bottom = top
# left = (thumb.shape[1] - resized.shape[1]) / 2
# right = left
# padded = cv.copyMakeBorder(resized, top, bottom, left, right, cv.BORDER_CONSTANT)
# if padded.shape != thumb.shape:
# padded = cv.resize(padded, thumb.shape, interpolation=cv.INTER_AREA)
# diff = cv.cvtColor(cv.absdiff(thumb, padded), cv.COLOR_BGR2GRAY)
viewer = ImageViewer(resized, diff)
layout = QVBoxLayout()
layout.addWidget(viewer)
self.setLayout(layout)
def __init__(self, filename, image, parent=None):
super(QualityWidget, self).__init__(parent)
x = np.arange(1, 101)
y = loss_curve(image)
tail = 5
qm = np.argmin(y[:-tail]) + 1
if qm == 100 - tail:
qm = 100
figure = Figure()
canvas = FigureCanvas(figure)
axes = canvas.figure.subplots()
axes.plot(x, y * 100, label="compression loss")
axes.fill_between(x, y * 100, alpha=0.2)
axes.axvline(qm,
linestyle=":",
color="k",
label=f"min error (q = {qm})")
xt = axes.get_xticks()
xt = np.append(xt, 1)
axes.set_xticks(xt)
axes.set_xlim([1, 100])
axes.set_ylim([0, 100])
axes.set_xlabel(self.tr("JPEG quality (%)"))
axes.set_ylabel(self.tr("average error (%)"))
axes.grid(True, which="both")
axes.legend(loc="upper center")
axes.figure.canvas.draw()
figure.set_tight_layout(True)
main_layout = QVBoxLayout()
main_layout.addWidget(canvas)
MRK = b"\xFF"
SOI = b"\xD8"
DQT = b"\xDB"
# DHT = b'\xC4'
MSK = b"\x0F"
PAD = b"\x00"
MAX_TABLES = 2
LEN_OFFSET = 2
LUMA_IDX = 0
CHROMA_IDX = 1
luma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
chroma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
temp_file = QTemporaryFile()
try:
if temp_file.open():
copyfile(filename, temp_file.fileName())
subprocess.run(
[
exiftool_exe(), "-all=", "-overwrite_original",
temp_file.fileName()
],
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
)
found = False
with open(temp_file.fileName(), "rb") as file:
first = file.read(1)
if first not in [MRK, SOI]:
raise ValueError(self.tr("File is not a JPEG image!"))
while True:
if not self.find_next(file, [MRK, DQT, PAD]):
break
length = file.read(1)[0] - LEN_OFFSET
if length <= 0 or length % (TABLE_SIZE + 1) != 0:
continue
while length > 0:
mode = file.read(1)
if not mode:
break
index = mode[0] & MSK[0]
if index >= MAX_TABLES:
break
length -= 1
for k in range(TABLE_SIZE):
b = file.read(1)[0]
if not b:
break
length -= 1
i, j = ZIG_ZAG[k]
if index == LUMA_IDX:
luma[i, j] = b
elif index == CHROMA_IDX:
chroma[i, j] = b
else:
found = True
if not found:
raise ValueError(self.tr("Unable to find JPEG tables!"))
levels = [(1 - (np.mean(t.ravel()[1:]) - 1) / 254) * 100
for t in [luma, chroma]]
distance = np.zeros(101)
for qm in range(101):
lu, ch = cv.split(get_tables(qm))
lu_diff = np.mean(cv.absdiff(luma, lu))
ch_diff = np.mean(cv.absdiff(chroma, ch))
distance[qm] = (lu_diff + 2 * ch_diff) / 3
closest = np.argmin(distance)
deviation = distance[closest]
if deviation == 0:
quality = closest
message = "(standard tables)"
else:
quality = int(np.round(closest - deviation))
message = f"(deviation from standard tables = {deviation:.4f})"
if quality == 0:
quality = 1
quality_label = QLabel(
self.tr(
f"[JPEG FORMAT] Last saved quality: {quality}% {message}"))
modify_font(quality_label, bold=True)
luma_label = QLabel(
self.
tr(f"Luminance Quantization Table (level = {levels[0]:.2f}%)\n"
))
luma_label.setAlignment(Qt.AlignCenter)
modify_font(luma_label, underline=True)
luma_table = self.create_table(luma)
luma_table.setFixedSize(420, 190)
chroma_label = QLabel(
self.
tr(f"Chrominance Quantization Table (level = {levels[1]:.2f}%)\n"
))
chroma_label.setAlignment(Qt.AlignCenter)
modify_font(chroma_label, underline=True)
chroma_table = self.create_table(chroma)
chroma_table.setFixedSize(420, 190)
table_layout = QGridLayout()
table_layout.addWidget(luma_label, 0, 0)
table_layout.addWidget(luma_table, 1, 0)
table_layout.addWidget(chroma_label, 0, 1)
table_layout.addWidget(chroma_table, 1, 1)
table_layout.addWidget(quality_label, 2, 0, 1, 2)
main_layout.addLayout(table_layout)
except ValueError:
modelfile = "models/jpeg_qf.mdl"
try:
model = load(modelfile)
limit = model.best_ntree_limit if hasattr(
model, "best_ntree_limit") else None
# f = self.get_features(image)
# p = model.predict_proba(f, ntree_limit=limit)[0, 0]
qp = model.predict(np.reshape(y, (1, len(y))),
ntree_limit=limit)[0]
# if p > 0.5:
# p = 2 * (p - 0.5) * 100
# output = self.tr('Uncompressed image (p = {:.2f}%)'.format(p))
# else:
# p = (1 - 2 * p) * 100
# output = self.tr('Compressed image (p = {:.2f}%) ---> Estimated JPEG quality = {}%'.format(p, qm))
message = self.tr(
f"[LOSSLESS FORMAT] Estimated last saved quality = {qp:.1f}%{'' if qp <= 99 else ' (uncompressed)'}"
)
if qp == 100:
message += " (uncompressed)"
prob_label = QLabel(message)
modify_font(prob_label, bold=True)
main_layout.addWidget(prob_label)
except FileNotFoundError:
QMessageBox.critical(
self, self.tr("Error"),
self.tr(f'Model not found ("{modelfile}")!'))
main_layout.addStretch()
self.setLayout(main_layout)
def __init__(self, filename, parent=None):
super(QualityWidget, self).__init__(parent)
MRK = b'\xFF'
SOI = b'\xD8'
DQT = b'\xDB'
# DHT = b'\xC4'
MSK = b'\x0F'
PAD = b'\x00'
MAX_TABLES = 2
LEN_OFFSET = 2
LUMA_IDX = 0
CHROMA_IDX = 1
luma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
chroma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
temp_file = QTemporaryFile()
if temp_file.open():
copyfile(filename, temp_file.fileName())
subprocess.run([
exiftool_exe(), '-all=', '-overwrite_original',
temp_file.fileName()
],
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
found = False
with open(temp_file.fileName(), 'rb') as file:
first = file.read(1)
if first not in [MRK, SOI]:
self.show_error(self.tr('File is not a JPEG image!'))
return
while True:
if not self.find_next(file, [MRK, DQT, PAD]):
break
length = file.read(1)[0] - LEN_OFFSET
if length <= 0 or length % (TABLE_SIZE + 1) != 0:
continue
while length > 0:
mode = file.read(1)
if not mode:
break
index = mode[0] & MSK[0]
if index >= MAX_TABLES:
break
length -= 1
for k in range(TABLE_SIZE):
b = file.read(1)[0]
if not b:
break
length -= 1
i, j = ZIG_ZAG[k]
if index == LUMA_IDX:
luma[i, j] = b
elif index == CHROMA_IDX:
chroma[i, j] = b
else:
found = True
if not found:
self.show_error(self.tr('Unable to find JPEG tables!'))
return
levels = [(1 - (np.mean(t.ravel()[1:]) - 1) / 254) * 100
for t in [luma, chroma]]
distance = np.zeros(101)
for q in range(101):
lu, ch = cv.split(get_tables(q))
lu_diff = np.mean(cv.absdiff(luma, lu))
ch_diff = np.mean(cv.absdiff(chroma, ch))
distance[q] = (lu_diff + 2 * ch_diff) / 3
closest = np.argmin(distance)
deviation = distance[closest]
if deviation == 0:
quality = closest
message = '(standard tables)'
else:
quality = int(np.round(closest - deviation))
message = '(deviation from standard = {:.4f})'.format(deviation)
quality_label = QLabel(
self.tr('Last saved JPEG quality: {}% {}'.format(quality,
message)))
modify_font(quality_label, bold=True)
luma_label = QLabel(
self.tr('Luminance Quantization Table (level = {:.2f}%)\n'.format(
levels[0])))
luma_label.setAlignment(Qt.AlignCenter)
modify_font(luma_label, underline=True)
luma_table = self.create_table(luma)
luma_table.setMaximumHeight(200)
chroma_label = QLabel(
self.tr(
'Chrominance Quantization Table (level = {:.2f}%)\n'.format(
levels[1])))
chroma_label.setAlignment(Qt.AlignCenter)
modify_font(chroma_label, underline=True)
chroma_table = self.create_table(chroma)
chroma_table.setMaximumHeight(200)
main_layout = QGridLayout()
main_layout.addWidget(luma_label, 0, 0)
main_layout.addWidget(luma_table, 1, 0)
main_layout.addWidget(chroma_label, 0, 1)
main_layout.addWidget(chroma_table, 1, 1)
main_layout.addWidget(quality_label, 2, 0, 1, 2)
self.setLayout(main_layout)
self.setFixedSize(880, 270)
def __init__(self, filename, parent=None):
super(QualityWidget, self).__init__(parent)
MRK = b'\xFF'
SOI = b'\xD8'
DQT = b'\xDB'
# DHT = b'\xC4'
MSK = b'\x0F'
PAD = b'\x00'
MAX_TABLES = 2
LEN_OFFSET = 2
LUMA_IDX = 0
CHROMA_IDX = 1
luma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
chroma = np.zeros((DCT_SIZE, DCT_SIZE), dtype=int)
temp_file = QTemporaryFile()
if temp_file.open():
copyfile(filename, temp_file.fileName())
subprocess.run([
exiftool_exe(), '-all=', '-overwrite_original',
temp_file.fileName()
],
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL)
found = False
with open(temp_file.fileName(), 'rb') as file:
first = file.read(1)
if first not in [MRK, SOI]:
self.show_error(self.tr('File is not a JPEG image!'))
return
while True:
if not self.find_next(file, [MRK, DQT, PAD]):
break
length = file.read(1)[0] - LEN_OFFSET
if length <= 0 or length % (TABLE_SIZE + 1) != 0:
continue
while length > 0:
mode = file.read(1)
if not mode:
break
index = mode[0] & MSK[0]
if index >= MAX_TABLES:
break
length -= 1
for k in range(TABLE_SIZE):
b = file.read(1)[0]
if not b:
break
length -= 1
i, j = ZIG_ZAG[k]
if index == LUMA_IDX:
luma[i, j] = b
elif index == CHROMA_IDX:
chroma[i, j] = b
else:
found = True
if not found:
self.show_error(self.tr('Unable to find JPEG tables!'))
return
tables = np.concatenate(
(luma[:, :, np.newaxis], chroma[:, :, np.newaxis]), axis=2)
levels = [0, 0]
for i in range(2):
table = tables[:, :, i]
mean = (np.mean(table) * TABLE_SIZE - table[0, 0]) / (TABLE_SIZE -
1)
levels[i] = (1 - mean / 255) * 100
if levels[i] > 99.6:
levels[i] = 100
profile = [np.mean(np.abs(tables - get_tables(q))) for q in range(101)]
quality = np.argmin(profile)
luma_label = QLabel(
self.tr('Luminance Quantization Table (level = {:.2f}%)\n'.format(
levels[0])))
luma_label.setAlignment(Qt.AlignCenter)
modify_font(luma_label, underline=True)
luma_table = self.create_table(luma)
chroma_label = QLabel(
self.tr(
'Chrominance Quantization Table (level = {:.2f}%)\n'.format(
levels[1])))
chroma_label.setAlignment(Qt.AlignCenter)
modify_font(chroma_label, underline=True)
chroma_table = self.create_table(chroma)
quality_label = QLabel(
self.tr(
'Estimated JPEG quality (last save) = {}%'.format(quality)))
modify_font(quality_label, bold=True)
deviation_label = QLabel(
self.tr('(average deviation from standard tables = {:.2f})'.format(
profile[quality])))
modify_font(deviation_label, italic=True)
deviation_label.setAlignment(Qt.AlignRight)
main_layout = QGridLayout()
main_layout.addWidget(luma_label, 0, 0)
main_layout.addWidget(luma_table, 1, 0)
main_layout.addWidget(chroma_label, 0, 1)
main_layout.addWidget(chroma_table, 1, 1)
main_layout.addWidget(quality_label, 2, 0)
main_layout.addWidget(deviation_label, 2, 1)
self.setLayout(main_layout)
self.setMinimumSize(890, 270)