As ClutterTexture is now marked as deprecated, I followed the recommendation and replaced it with a ClutterActor that has it's content set to a pixbuf.
from gi.repository import Clutter, GdkPixbuf, Cogl
Clutter.init([])
stage = Clutter.Stage()
stage.set_size(600, 300)
# old style
texture_actor = Clutter.Texture(filename='icon_big_a.png')
texture_actor.set_opacity(127)
stage.add_child(texture_actor)
# replacement because ClutterTexture is deprecated
pixbuf = GdkPixbuf.Pixbuf.new_from_file('icon_big_b.png')
pixel_format = Cogl.PixelFormat.RGBA_8888 if pixbuf.get_has_alpha() \
else Cogl.PixelFormat.RGB_888
image = Clutter.Image()
image.set_data(
pixbuf.get_pixels(),
pixel_format,
pixbuf.get_width(),
pixbuf.get_height(),
pixbuf.get_rowstride(),
)
image_actor = Clutter.Actor()
image_actor.set_content_scaling_filters(
Clutter.ScalingFilter.TRILINEAR,
Clutter.ScalingFilter.LINEAR
)
image_actor.set_content(image)
image_actor.set_size(pixbuf.get_width(), pixbuf.get_height())
image_actor.set_opacity(127)
image_actor.move_by(300, 0)
stage.add_child(image_actor)
stage.show()
Clutter.main()
Everything works but when I change the actors opacity to 127, it darkens the background even where it's white.
Here is a git repo with code and screenshot of the problem
When I set the opacity to 255 everything looks like it should, white is then white.