wmf file to bitmap was forced to 72 dpi

[FrankLiu007]

What did you do?

I read in an wmf image and then save it as a png image. I found the resolution of the result image is rather low no matter how I set the quality parameters.

When I looking into the source code ( src/PIL/WmfImagePlugin.py), I found the resolution was fixed to 72dpi.

What are your OS, Python and Pillow versions?

• OS: win10
• Python: 3.6.8
• Pillow: 6.1.0

[FrankLiu007]

image2.zip
Lucky, zip is permitted.

[radarhere]

For now, I think you should be able to use this code to set the size that the image is rendered at, and so effectively, the DPI that is used to create the image -

from PIL import Image
im = Image.open("test.wmf")
im._size = (300, 300)
im.load()

[radarhere]

I've created PR #4311 to resolve this, by adding a dpi argument to the WmfImagePlugin load method -

with Image.open("Tests/images/drawing.wmf") as im:
    im.load(144)