def func(self, *args):
exc = ExceptionInfo()
args = [self] + list(args) + [exc]
res = fun(*args)
if not res:
raise ImageMagickException(exc)
return Image(res)
def compare(self, other, metric):
dbl = (ctypes.c_double * 1)()
exp = ExceptionInfo()
img = CompareImageChannels(self, other, ChannelType.All, metric, dbl,
exp)
if not img:
raise ImageMagickException(exp)
return (dbl[0], Image(img))
def __enter__(self):
exc = ExceptionInfo()
px = lib.GetAuthenticPixels(self.im, self.x, self.y, self.w, self.h,
exc)
if not px:
raise ImageMagickException(exc)
self.px = ctypes.cast(px,
ctypes.POINTER(PixelPacket * (self.w * self.h)))
return self
def ping(C, file):
if isinstance(file, str):
inf = ImageInfo()
inf.filename = file
exinfo = ExceptionInfo()
res = lib.PingImage(inf, exinfo)
if not res:
raise ImageMagickException(exinfo)
return C(res)
else:
raise NotImplementedError
def copyPixels(self, source, sx, sy, w, h, tx, ty):
exc = ExceptionInfo()
dest = lib.GetAuthenticPixels(self, tx, ty, w, h, exc)
if not dest:
raise ImageMagickException(exc)
src = lib.GetAuthenticPixels(source, sx, sy, w, h, exc)
if not src:
raise ImageMagickException(exc)
artype = ctypes.POINTER(PixelPacket * (w * h))
artype1 = PixelPacket * (w * h)
dest = ctypes.cast(dest, artype)
src = ctypes.cast(src, artype)
for i in range(w * h):
dest[0][i] = src[0][i]
if not lib.SyncAuthenticPixels(self, exc):
raise ImageMagickException(exc)
def tile(C, file, width, height):
if isinstance(file, str):
inf = ImageInfo()
file = 'tile:' + file
inf.size = "%dx%d" % (width, height)
inf.filename = file
try:
exinfo = ExceptionInfo()
res = lib.ReadImage(inf, exinfo)
if not res:
raise ImageMagickException(exinfo)
return C(res)
finally:
inf.size = 0
inf.file = 0
else:
raise NotImplementedError
def copy(self):
exc = ExceptionInfo()
res = lib.CloneImage(self, 0, 0, True, exc)
if not res:
raise ImageMagickException(exc)
return Image(res)
def __exit__(self, A, B, C):
del self.px
exc = ExceptionInfo()
lib.SyncAuthenticPixels(self.im, exc)
del self.im