def encode(self, text, **kw):
border = kw.get('border', self.border)
w = kw.get('width', self.width) - border * 2
v = kw.get('version', self.version)
mode = kw.get('mode', self.mode.ALNUM)
eclevel = kw.get('eclevel', self.eclevel.L)
case_sensitive = kw.get('case_sensitive', self.case_sensitive)
if v > 40:
raise InvalidArgsError('version should be between 1 and 40')
version, width, data = _encode(text+'\0', case_sensitive, v, eclevel, mode)
rawdata = ''
dotsize = w / width
realwidth = width * dotsize
for y in range(width):
line = ''
for x in range(width):
if ord(data[y*width+x]) % 2:
line += dotsize * chr(0)
else:
line += dotsize * chr(255)
lines = dotsize * line
rawdata += lines
image = fromstring('L', (realwidth, realwidth), rawdata)
return expand(image, border, 255)
def convert_for_output(self):
in_x_pixels = self.inputImage.size[0]
in_y_pixels = self.inputImage.size[1]
border_pixels = self.border*self.pointspermm
output_max_x_pixels = self.xsize*self.pointspermm - border_pixels
output_max_y_pixels = self.ysize*self.pointspermm - border_pixels
if self.debug:
print "Converting for output:"
print " output pixels per mm: ", self.pointspermm
print " input size: %dx%d pixels" % (in_x_pixels,in_y_pixels)
print " border pixels: ", border_pixels
print " output max size: %dx%d pixels" % (output_max_x_pixels, output_max_y_pixels)
# Resize if needed
if (in_x_pixels > output_max_x_pixels) or (in_y_pixels > output_max_y_pixels):
# We have to reduce the image resolution
xratio = float(output_max_x_pixels)/float(in_x_pixels)
yratio = float(output_max_y_pixels)/float(in_y_pixels)
if xratio < yratio:
newxsize = output_max_x_pixels
newysize = int(float(self.inputImage.size[1]) * xratio)
else:
newysize = output_max_y_pixels
newxsize = int(float(self.inputImage.size[0]) * yratio)
if self.debug:
print " Resizing to %dx%d pixels" % (newxsize, newysize)
self.inputImage = self.inputImage.resize((newxsize,newysize))
if self.twotone:
# We want a bicolor interpretation
if self.inputImage.mode != "1":
if self.debug:
print " Converting to bicolor"
self.inputImage = self.inputImage.convert("1")
else:
# Change to grayscale if needed
if self.inputImage.mode != "L":
if self.debug:
print " Converting to grayscale"
self.inputImage = self.inputImage.convert("L")
if self.border > 0:
if self.debug:
print " Adding border of %d pixels" % border_pixels
self.inputImage = expand(self.inputImage, border_pixels)
if self.invert:
if self.debug:
print " Inverting image tones"
self.inputImage = invert(self.inputImage)
if self.debug:
print "Extrema: ", self.inputImage.getextrema()
return
