Okay, I see what’s happening. I had the x and y positioning wrong. This works, as shown:
xsize = white.getXSize()
ysize = white.getYSize()
text_img = PNMImage(xsize, ysize)
text_img.fill(1.0)
pt = PNMTextMaker("arial.ttf",0)
b = pt.generate_into("testing testing",text_img,0,ysize)There doesn’t seem to be a way to get the height of the text, which complicates matters when trying to place it as desired on an image. There doesn’t seem to be a constant height, either. Both height and width of the text vary by font. We can get the width of the text, but not the height, unless I’m missing something, or there’s an undocumented option. 
