I wrote an image exporter for Fusion Charts while working for YouGov/Polimetrix, and someone recently asked if they could use it as well.
You’ll have to alter it a bit because it was written for a custom CherryPy-based framework. It works with Fusion Charts 3.1 (and 3.0 with trivial changes to the POST variables being read).
The only dependency is on PIL:
from StringIO import StringIO import Image import ImageColor import cherrypy def str2color(val): return ImageColor.getrgb('#'+val.ljust(6, '0')) class SaveImagePage(LoggedInPage): # Custom framework specific -- remove def control(self, page, meta_width='', meta_height='', meta_bgColor='ffffff', stream=''): # Convert 3.1 parameters to 3.0 style as they made more sense width = meta_width height = meta_height bgcolor = meta_bgColor data = stream # Split the data into rows using ; as the spearator rows = data.split(';') # Create image bgcolor = str2color(bgcolor) im = Image.new('RGB', (int(width), int(height)), bgcolor) imcore = im.load() for y, row in enumerate(rows): x = 0 # Split row into pixels pixels = row.split(',') for pixel in pixels: # Split pixel into color and repeat value color, repeat = pixel.split('_') repeat = int(repeat) if color == '': # Empty color == background color color = bgcolor else: # Pad color to 6 characters color = str2color(color) while repeat: # Add pixels 1-at-a-time since putdata() doesn't work imcore[x, y] = color x += 1 repeat -= 1 # Save image into file like object imstr = StringIO() im.save(imstr, 'PNG', quality=100) # Set HTTP headers -- CherryPy specific code cherrypy.response.headers['content-type'] = 'image/png' cherrypy.response.headers['content-disposition'] = \ 'attachment; filename="Chart.png' # Return image as string, your framework may be different return imstr.getvalue()
