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Computer Graphics in Python and Pycairo

Working with Images

Learn how to use images in Pycairo.

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Loading an image into Pycairo

Before we look at the SurfacePattern, we will take a quick look at how we can load an image into Pycairo.

Surface provides a create_from_png class method that reads a PNG image from a file, creates a suitable surface, and fills the surface with the image pixels. Here is how it can be used:

Python 3.8
import cairo
import math
image = cairo.ImageSurface.create_from_png('tiger.png')
print("width:", image.get_width())
print("height:", image.get_height())
image.write_to_png('output/image.png')

This code reads in a PNG file called tiger.png, but we can use any PNG image. The newly-created surface, called image, is queried for size and format. The image is 400 by 400 pixels, which the code above will print when ...