_re_buffer_address = re.compile('<read-write buffer ptr 0x([0-9a-f]*),')
    global _re_buffer_address_match
    _re_buffer_address_match = _re_buffer_address.match
    return _re_buffer_address_match(buf_repr)

def PySide_data(image):
    # PySide's QImage.bits() returns a buffer object like this:
    # <read-write buffer ptr 0x7fc3f4821600, size 76800 at 0x111269570>
    ma = _re_buffer_address_match(repr(image.bits()))
    assert ma, 'could not parse address from %r' % (image.bits(), )
    return (int(ma.group(1), 16), False)

getdata = dict(
    PyQt4 = PyQt4_data,
    PySide = PySide_data,
)[qt.name()]


def qimageview(image):
    if not isinstance(image, QtGui.QImage):
        raise TypeError("image argument must be a QImage instance")

    shape = image.height(), image.width()
    strides0 = image.bytesPerLine()

    format = image.format()
    if format == QtGui.QImage.Format_Indexed8:
        dtype = "|u1"
        strides1 = 1
    elif format in (QtGui.QImage.Format_RGB32, QtGui.QImage.Format_ARGB32, QtGui.QImage.Format_ARGB32_Premultiplied):
        dtype = "|u4"
Пример #2
0
    return image.bits()

# I would have preferred a more pythonic (duck-typing-like) approach
# based on introspection, but finding out which one of the above functions
# works at runtime is quite hard
getdata = {
    ('PyQt4', 2) : PyQt_data,
    ('PyQt5', 2) : PyQt_data,
    ('PySide', 2) : PySide_data,
    ('PySide2', 2) : PySide_data,
    ('PyQt4', 3) : PyQt_data,
    ('PyQt5', 3) : PyQt_data,
    ('PySide', 3) : direct_buffer_data,
    ('PySide2', 3) : direct_buffer_data,
    ('PythonQt', 3) : direct_buffer_data,
}[qt.name(), sys.version_info.major]

VALIDFORMATS_8BIT = tuple(
    getattr(QtGui.QImage, name)
    for name in ('Format_Indexed8', 'Format_Grayscale8')
    if name in dir(QtGui.QImage))
VALIDFORMATS_32BIT = (
    QtGui.QImage.Format_RGB32,
    QtGui.QImage.Format_ARGB32,
    QtGui.QImage.Format_ARGB32_Premultiplied)

class ArrayInterfaceAroundQImage(object):
    __slots__ = ('__qimage', '__array_interface__')

    def __init__(self, image, bytes_per_pixel):
        self.__qimage = image
Пример #3
0

# I would have preferred a more pythonic (duck-typing-like) approach
# based on introspection, but finding out which one of the above functions
# works at runtime is quite hard
getdata = {
    ('PyQt4', 2): PyQt_data,
    ('PyQt5', 2): PyQt_data,
    ('PySide', 2): PySide_data,
    ('PySide2', 2): PySide_data,
    ('PyQt4', 3): PyQt_data,
    ('PyQt5', 3): PyQt_data,
    ('PySide', 3): direct_buffer_data,
    ('PySide2', 3): direct_buffer_data,
    ('PythonQt', 3): direct_buffer_data,
}[qt.name(), sys.version_info.major]


# what properties (e.g., how many bits) do the different formats have?
class QImageFormat(object):
    def __init__(self, bits, rgb_layout=None):
        self.code = None
        self.bits = bits
        self.rgb_layout = rgb_layout

    @staticmethod
    def from_code(code):
        for name, qimage_format in FORMATS.items():
            if qimage_format.code == code:
                return qimage_format
Пример #4
0
    return _re_buffer_address_match(buf_repr)


def PySide_data(image):
    # PySide's QImage.bits() returns a buffer object like this:
    # <read-write buffer ptr 0x7fc3f4821600, size 76800 at 0x111269570>
    ma = _re_buffer_address_match(repr(image.bits()))
    assert ma, 'could not parse address from %r' % (image.bits(), )
    return (int(ma.group(1), 16), False)


getdata = dict(
    PyQt4=PyQt_data,
    PyQt5=PyQt_data,
    PySide=PySide_data,
)[qt.name()]


def qimageview(image):
    if not isinstance(image, QtGui.QImage):
        raise TypeError("image argument must be a QImage instance")

    shape = image.height(), image.width()
    strides0 = image.bytesPerLine()

    format = image.format()
    if format == QtGui.QImage.Format_Indexed8:
        dtype = "|u1"
        strides1 = 1
    elif format in (QtGui.QImage.Format_RGB32, QtGui.QImage.Format_ARGB32,
                    QtGui.QImage.Format_ARGB32_Premultiplied):