Using PIL with Django

Fredrik Lundh | February 2006 | Originally posted to online.effbot.org

 

Here’s a simple django view which creates a PIL image on the fly, and returns it as a PNG image:

from django.utils.httpwrappers import HttpResponse
from PIL import Image

import random
INK = "red", "blue", "green", "yellow"

def image(request):

    # ... create/load image here ...
    image = Image.new("RGB", (800, 600), random.choice(INK))

    # serialize to HTTP response
    response = HttpResponse(mimetype="image/png")
    image.save(response, "PNG")
    return response

To draw things on the fly, you can use either PIL’s ImageDraw module, or the aggdraw module:

from django.utils.httpwrappers import HttpResponse
from PIL import Image
from aggdraw import Draw, Pen, Brush, Font

import random

def graphics(request):

    image = Image.new("RGB", (800, 600), "white")
    draw = Draw(image)

    # ... draw graphics here ...
    for i in range(20):
        x0 = random.randint(0, image.size[0])
        y0 = random.randint(0, image.size[1])
        x1 = random.randint(0, image.size[0])
        y1 = random.randint(0, image.size[1])
        draw.rectangle((x0, y0, x1, y1), Pen(random.choice(INK), 5))

    draw.flush()

    response = HttpResponse(mimetype="image/png")
    image.save(response, "PNG")
    return response

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