Question

12

How to use GDK with Quickly

rated 0 times [ 12] [ 0] / answers: 1 / hits: 3535 / 2 Years ago, wed, december 8, 2021, 5:43:14

I trying to use the library gdk for scale down an image and apply it to a GdkImage.

This is the code
pixbuf = Gdk.pixbuf_new_from_file(fileName) pixbuf = pixbuf.scale_simple(100, 100, Gdk.INTERP_BILINEAR)

The problem is that python can't find Gdk even if I use everything in lowercase

Error:
pixbuf = Gdk.pixbuf_new_from_file(fileName)
NameError: global name 'Gdk' is not defined

I don't know what should I do because I tried to import Gdk but nothing is changed

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taigysel

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answered 2 Years ago ledeball · Accepted Answer

Try importing it like this:

 from gi.repository import Gtk

 from gi.repository.GdkPixbuf import Pixbuf, InterpType

then:

 pixbuf = Pixbuf.new_from_file(filename)

 pixbuf = pixbuf.scale_simple(100, 100, InterpType.BILINEAR)

I would recommend using the command below because it automatically scales it when it reads it in. Just specify how big (pixels) you want the image to be:

 pixbuf = Pixbuf.new_from_file_at_size(size_x, size_y, filename)

Using scale_simple() does not preserve aspect ratio.

Using new_from_file_at_size() preserves aspect ratio