Workaround: GdkPixbuf.get_pixels() does not have a functional GIR binding.

We use a new cairo.ImageSurface instead; ImageSurface.get_data() returns
a properly wrapped python buffer object.

1 files changed, 9 insertions, 4 deletions

diff --git a/TurtleArt/tacanvas.py b/TurtleArt/tacanvas.py
index 8b294a9..7a31b90 100644
--- a/TurtleArt/tacanvas.py
+++ b/TurtleArt/tacanvas.py
@@ -700,11 +700,16 @@ class TurtleGraphics:
             h = self.tw.turtle_canvas.get_height()
             if x < 0 or x > (w - 1) or y < 0 or y > (h - 1):
                 return(-1, -1, -1, -1)
-            # Map the cairo surface onto a pixbuf
-            pixbuf = Gdk.pixbuf_get_from_surface(self.tw.turtle_canvas,
-                                                 x, y, 1, 1)
+            # create a new 1x1 cairo surface
+            cs = cairo.ImageSurface(cairo.FORMAT_RGB24, 1, 1);
+            cr = cairo.Context(cs)
+            cr.set_source_surface(self.tw.turtle_canvas, -x, -y)
+            cr.rectangle(0,0,1,1)
+            cr.set_operator(cairo.OPERATOR_SOURCE)
+            cr.fill()
+            cs.flush() # ensure all writing is done
             # Read the pixel
-            pixels = pixbuf.get_pixels()
+            pixels = cs.get_data()
             return (ord(pixels[0]), ord(pixels[1]), ord(pixels[2]), 0)
         else:
             return(-1, -1, -1, -1)