Hi again,
I have a program that needs to draw circles and other elements on a
gdk.Pixbuf image.
The current code works well but when creating a Cairo-surface from
pixbuf, the gtk.gdk.Pixbuf.get_pixels_array() function reports that
it's deprecated and should be avoided.
pix_data = pixbuf.get_pixels_array()
surface = cairo.ImageSurface.create_for_data(pix_data,
cairo.FORMAT_RGB24, pixbuf.get_width(),
pixbuf.get_height(), pixbuf.get_rowstride())
The message says:
"""draw-test.py:29: DeprecationWarning: PyArray_FromDimsAndDataAndDescr:
use PyArray_NewFromDescr.
pix_data = pixbuf.get_pixels_array()"""
Ref:
http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html#method-gdkpixbuf--get-pixels-array
Here is my test code.
http://www.futuredesktop.com/tmp/draw-test.py
-----
The c version of Cairo and PyCairo behave differently.
In c code, to get create the Cairo surface, I have to use
gdk_pixbuf_get_pixels(), not the get_pixels_array() function.
gint pixbuf_width = gdk_pixbuf_get_width(pixbuf);
gint pixbuf_height = gdk_pixbuf_get_height(pixbuf);
cairo_surface_t *surface =
cairo_image_surface_create_for_data(gdk_pixbuf_get_pixels(pixbuf),
CAIRO_FORMAT_RGB24,
pixbuf_width,
pixbuf_height,
gdk_pixbuf_get_rowstride(pixbuf));
Unfortunately PyCairo's
surface = cairo.ImageSurface.create_for_data(...) expects an array type,
not a string type. AFAIK, strings are not arrays in Python.
http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html#method-gdkpixbuf--get-pixels
returns a string type
------
Questions:
1) What is the best way to draw onto gdk.Pixbuf? (most likely using
Cairo, other means also welcomed)
2) If the gtk.gdk.Pixbuf.get_pixels_array() or its internals are
deprecated, then what will replace it?
Greetings
Osmo (Moma) Antero
Grønland, Oslo
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