I want Django to automatically add a small image at the bottom of every picture uploaded by user (meaning joining these two images into one).
The bottom image would contain some text i.e. example.com {{curr_date}} and would have to adjust to the width of the uploaded picture.
class Picture(models.Model):
pic = models.ImageField()
What is the easiest way to achieve it?
So far I've looked into django-imagekit, but it seems they do not have processor that would do this task.
In my own situations I have occasionally looked into django-imagekit and realized that I needed to just process things myself using PIL/Pillow. The following code has not been 100% tested, so consider it a rough guide rather than an exact roadmap:
from PIL import Image, ImageDraw, ImageFont
#open your original image, get it's width
img_src = Image.open('my_img.jpg')
xsize, ysize = img_src.size()
#create a new image that's just a little bit taller than the src image
img_text = Image.new("RGB",(xsize,yszize+30))
#paste the old image into the new one, flush at the top
img_text.paste(img_src,(0,0))
#Load font, draw to the bottom of the new image
#note that you must have the font file in your project
font = ImageFont.truetype("Arial.ttf", 16)
draw = ImageDraw.Draw(img_text)
draw.text((0, xsize),"Put your text here",(255,255,255),font=font)
img_text.save("appended_image.jpg")
If you want to add the new image to an actual Django image field, the saving is a bit more complicated (see this answer, for example, on how to go about doing that)
django-imagekit supports custom processors. All you have to do is define a class with a process method that both accepts and returns an image. This way you'll get all the benefit of IK (model fields, caching, etc).
