def draw(self):
if 0:
assert isinstance(self.canv, pdfgen.canvas.Canvas)
if (self.filename, self.tiff_page, self.bbox) in self.cache:
img = self.cache[(self.filename, self.tiff_page, self.bbox)]
else:
img = StringIO.StringIO(
image.get_pbm(
image.get_a1_from_tiff(
self.filename, self.tiff_page,
self.rotated if self.rotated else False)))
img = Image.open(img).crop(self.bbox)
self.cache[(self.filename, self.bbox)] = img
self.canv.drawInlineImage(img, 0, 0, self.width, self.height)
self.canv.setStrokeColorRGB(0.6, 0.6, 0.6)
self.canv.line(0, 0, self.available_width, 0)
self.canv.line(0, self.height, self.available_width, self.height)
def draw(self):
if 0:
assert isinstance(self.canv, pdfgen.canvas.Canvas)
if (self.filename, self.tiff_page, self.bbox) in self.cache:
img = self.cache[(self.filename, self.tiff_page, self.bbox)]
else:
img = StringIO.StringIO(
image.get_pbm(
image.get_a1_from_tiff(self.filename, self.tiff_page, self.rotated if self.rotated else False)
)
)
img = Image.open(img).crop(self.bbox)
self.cache[(self.filename, self.bbox)] = img
self.canv.drawInlineImage(img, 0, 0, self.width, self.height)
self.canv.setStrokeColorRGB(0.6, 0.6, 0.6)
self.canv.line(0, 0, self.available_width, 0)
self.canv.line(0, self.height, self.available_width, self.height)
def scan(surface, matrix, x, y, width, height, btype="CODE128", kfill=False):
x0, y0 = matrix.transform_point(x, y)
x1, y1 = matrix.transform_point(x + width, y + height)
# Bounding box ...
x = min(x0, x1)
y = min(y0, y1)
width = max(x0, x1) - x
height = max(y0, y1) - y
x, y, width, height = int(x), int(y), int(width), int(height)
# Round the width to multiple of 4 pixel, so that the stride will
# be good ... hopefully
width = width - width % 4 + 4
# a1 surface for kfill algorithm
a1_surface = cairo.ImageSurface(cairo.FORMAT_A1, width, height)
cr = cairo.Context(a1_surface)
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.set_source_surface(surface, -x, -y)
cr.paint()
if kfill:
pxpermm = (matrix[0] + matrix[3]) / 2
barwidth = pxpermm * defs.code128_barwidth
barwidth = int(round(barwidth))
if barwidth <= 3:
return
if barwidth > 6:
barwidth = 6
image.kfill_modified(a1_surface, barwidth)
pbm = image.get_pbm(a1_surface)
tmp = tempfile.mktemp(suffix='.png', prefix='sdaps-zbar-')
f = open(tmp, 'wb')
f.write(pbm)
f.close()
# Is the /dev/stdin sufficiently portable?
proc = subprocess.Popen(
['zbarimg', '-q', '-Sdisable',
'-S%s.enable' % btype.lower(), tmp],
stdout=subprocess.PIPE)
stdout, stderr = proc.communicate()
os.unlink(tmp)
# The following can be used to look at the images
#rgb_surface = cairo.ImageSurface(cairo.FORMAT_RGB24, width, height)
#cr = cairo.Context(rgb_surface)
#cr.set_operator(cairo.OPERATOR_SOURCE)
#cr.set_source_rgba(1, 1, 1, 1)
#cr.paint()
#cr.set_operator(cairo.OPERATOR_OVER)
#cr.set_source_rgba(0, 0, 0, 1)
#cr.mask_surface(a1_surface)
#global b_count
#rgb_surface.write_to_png("/tmp/barcode-%03i.png" % b_count)
#b_count += 1
if proc.returncode == 4:
return None
assert (proc.returncode == 0)
barcode = stdout.split(b'\n')[0]
assert barcode.split(b':', 1)[0].replace(
b'-', b'').lower() == btype.lower().encode('ascii')
return barcode.split(b':', 1)[1].decode('utf-8')
def scan(surface, matrix, x, y, width, height, btype="CODE128", kfill=False):
x0, y0 = matrix.transform_point(x, y)
x1, y1 = matrix.transform_point(x + width, y + height)
# Bounding box ...
x = min(x0, x1)
y = min(y0, y1)
width = max(x0, x1) - x
height = max(y0, y1) - y
x, y, width, height = int(x), int(y), int(width), int(height)
# Round the width to multiple of 4 pixel, so that the stride will
# be good ... hopefully
width = width - width % 4 + 4
# a1 surface for kfill algorithm
a1_surface = cairo.ImageSurface(cairo.FORMAT_A1, width, height)
cr = cairo.Context(a1_surface)
cr.set_operator(cairo.OPERATOR_SOURCE)
cr.set_source_surface(surface, -x, -y)
cr.paint()
if kfill:
pxpermm = (matrix[0] + matrix[3]) / 2
barwidth = pxpermm * defs.code128_barwidth
barwidth = int(round(barwidth))
if barwidth <= 3:
return
if barwidth > 6:
barwidth = 6
image.kfill_modified(a1_surface, barwidth)
pbm = image.get_pbm(a1_surface)
tmp = tempfile.mktemp(suffix='.png', prefix='sdaps-zbar-')
f = open(tmp, 'wb')
f.write(pbm)
f.close()
# Is the /dev/stdin sufficiently portable?
proc = subprocess.Popen(['zbarimg', '-q', '-Sdisable', '-S%s.enable' % btype.lower(), tmp], stdout=subprocess.PIPE)
stdout, stderr = proc.communicate()
os.unlink(tmp)
# The following can be used to look at the images
#rgb_surface = cairo.ImageSurface(cairo.FORMAT_RGB24, width, height)
#cr = cairo.Context(rgb_surface)
#cr.set_operator(cairo.OPERATOR_SOURCE)
#cr.set_source_rgba(1, 1, 1, 1)
#cr.paint()
#cr.set_operator(cairo.OPERATOR_OVER)
#cr.set_source_rgba(0, 0, 0, 1)
#cr.mask_surface(a1_surface)
#global b_count
#rgb_surface.write_to_png("/tmp/barcode-%03i.png" % b_count)
#b_count += 1
if proc.returncode == 4:
return None
assert(proc.returncode == 0)
barcode = stdout.split(b'\n')[0]
assert barcode.split(b':', 1)[0].replace(b'-', b'').lower() == btype.lower().encode('ascii')
return barcode.split(b':', 1)[1].decode('utf-8')