Hi
I wrote the code below for the purpose of wrapping text to fit within
a given pixel width:
Args:
drawer: Instance of "ImageDraw.Draw()"
text: string of long text to be wrapped
font: instance of ImageFont (I use .truetype)
containerWidth: number of pixels text lines have to fit into.
Outputs described after code below:
***code***
def IntelliDraw(drawer,text,font,containerWidth):
words = text.split()
lines = [] # prepare a return argument
lines.append(words)
finished = False
line = 0
while not finished:
thistext = lines[line]
newline = []
innerFinished = False
while not innerFinished:
#print 'thistext: '+str(thistext)
if drawer.textsize(' '.join(thistext),font)[0] > containerWidth:
# this is the heart of the algorithm: we pop words off
the current
# sentence until the width is ok, then in the next outer loop
# we move on to the next sentence.
newline.insert(0,thistext.pop(-1))
else:
innerFinished = True
if len(newline) > 0:
lines.append(newline)
line = line + 1
else:
finished = True
tmp = []
for i in lines:
tmp.append( ' '.join(i) )
lines = tmp
(width,height) = drawer.textsize(lines[0],font)
return (lines,width,height)
***endcode***
Outputs of function:
lines: list of strings which corresponds to the given "text"
argument, but broken up into list elements.
width: pixel width of the first line (should be less than containerWidth)
height: pixel height of first line (used for spacing successive lines)
An example of how this is used is given below:
***code***
text = 'One very extremely long string that cannot possibly fit \
into a small number of pixels of horizontal width, and the idea \
is to break this text up into multiple lines that can be placed like \
a paragraph into our image'
draw = ImageDraw.Draw(OurImagePreviouslyDefined)
font = fontpath = ImageFont.truetype('/usr/local/share/fonts/ttf/times.ttf',26)
pixelWidth = 500 # pixels
lines,tmp,h = IntelliDraw(draw,text,font,pixelWidth)
j = 0
for i in lines:
draw.text( (0,0+j*h), i , font=font16, fill='black')
j = j + 1
***endcode***
Hopefully this code works for you. As you may observe, the algorithm
is *extremely* simple and not optimal in any way. I would have loved
to have found something like this on the net, but couldn't, so maybe
someone else on this list is also looking.
Thanks
Caleb
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