def from_qimage(self, img):
from PyQt5.Qt import QImage
fmt = get_pixel_map()
if not img.hasAlphaChannel():
if img.format() != img.Format_RGB32:
img = img.convertToFormat(QImage.Format_RGB32)
fmt = fmt.replace('A', 'P')
else:
if img.format() != img.Format_ARGB32:
img = img.convertToFormat(QImage.Format_ARGB32)
raw = img.constBits().ascapsule()
self.constitute(img.width(), img.height(), fmt, raw)
def to_qimage(self):
from PyQt5.Qt import QImage, QByteArray
fmt = get_pixel_map()
# ImageMagick can only output raw data in some formats that can be
# read into QImage directly, if the QImage format is not one of those, use
# PNG
if fmt in {'RGBA', 'BGRA'}:
w, h = self.size
self.depth = 8 # QImage expects 8bpp
raw = self.export(fmt)
i = QImage(raw, w, h, QImage.Format_ARGB32)
del raw # According to the documentation, raw is supposed to not be deleted, but it works, so make it explicit
return i
else:
raw = self.export('PNG')
return QImage.fromData(QByteArray(raw), 'PNG')