def numpy_to_qpixmap(npimg):
data = npimg.astype(np.uint8)
(height, width) = npimg.shape[0:2]
format_ = QtGui.QImage.Format_RGB888
qimg = QtGui.QImage(data, width, height, format_)
qpixmap = QtGui.QPixmap.fromImage(qimg)
return qpixmap
def paint(self, painter, option, index):
painter.fillRect(option.rect, QtGui.QColor(191, 222, 185))
# path = "path\to\my\image.jpg"
self.path = "image.bmp"
image = QtGui.QImage(str(self.path))
pixmap = QtGui.QPixmap.fromImage(image)
pixmap.scaled(50, 40, QtCore.Qt.KeepAspectRatio)
painter.drawPixmap(option.rect, pixmap)
def read_thumb_as_qimg(thumb_path):
r"""
Args:
thumb_path (?):
Returns:
tuple: (qimg, width, height)
CommandLine:
python -m guitool.api_thumb_delegate --test-read_thumb_as_qimg --show
Example:
>>> # ENABLE_DOCTEST
>>> from guitool.api_thumb_delegate import * # NOQA
>>> import guitool
>>> # build test data
>>> thumb_path = ut.grab_test_imgpath('carl.jpg')
>>> # execute function
>>> guitool.ensure_qtapp()
>>> (qimg) = ut.memprof(read_thumb_as_qimg)(thumb_path)
>>> if ut.show_was_requested():
>>> lbl = test_show_qimg(qimg)
>>> guitool.qtapp_loop()
>>> # verify results
>>> print(qimg)
Timeit::
%timeit np.dstack((npimg, np.full(npimg.shape[0:2], 255, dtype=np.uint8)))
%timeit cv2.cvtColor(npimg, cv2.COLOR_BGR2BGRA)
npimg1 = np.dstack((npimg, np.full(npimg.shape[0:2], 255, dtype=np.uint8)))
# seems to be memory leak in cvtColor?
npimg2 = cv2.cvtColor(npimg, cv2.COLOR_BGR2BGRA)
"""
if VERBOSE_THUMB:
print('[ThumbDelegate] Reading thumb as qimg. thumb_path=%r' % (thumb_path,))
# Read thumbnail image and convert to 32bit aligned for Qt
#if False:
# data = np.dstack((npimg, np.full(npimg.shape[0:2], 255, dtype=np.uint8)))
#if False:
# # Reading the npimage and then handing it off to Qt causes a memory
# # leak. The numpy array probably is never unallocated because qt doesn't
# # own it and it never loses its reference count
# #npimg = vt.imread(thumb_path, delete_if_corrupted=True)
# #print('npimg.dtype = %r, %r' % (npimg.shape, npimg.dtype))
# #npimg = cv2.cvtColor(npimg, cv2.COLOR_BGR2BGRA)
# #format_ = QtGui.QImage.Format_ARGB32
# ## #data = npimg.astype(np.uint8)
# ## #npimg = np.dstack((npimg[:, :, 3], npimg[:, :, 0:2]))
# ## #data = npimg.astype(np.uint8)
# ##else:
# ## Memory seems to be no freed by the QImage?
# ##data = np.ascontiguousarray(npimg[:, :, ::-1].astype(np.uint8), dtype=np.uint8)
# ##data = np.ascontiguousarray(npimg[:, :, :].astype(np.uint8), dtype=np.uint8)
# #data = npimg
# ##format_ = QtGui.QImage.Format_RGB888
# #(height, width) = data.shape[0:2]
# #qimg = QtGui.QImage(data, width, height, format_)
# #del npimg
# #del data
#else:
#format_ = QtGui.QImage.Format_ARGB32
#qimg = QtGui.QImage(thumb_path, format_)
qimg = QtGui.QImage(thumb_path)
return qimg
