Features/GTK3/Porting: Difference between revisions

← Older edit Newer edit →

@@ Line 259: / Line 259: @@
 <pre>
-# Map the xlib surface onto a pixmap
+# create a new 1x1 cairo surface
-pixmap = gtk.gdk.Pixmap(None, w, h, 24)
+cs = cairo.ImageSurface(cairo.FORMAT_RGB24, 1, 1);
-cairo_context = pixmap.cairo_create()
+cr = cairo.Context(cs)
-cairo_context.set_source_surface(xlib_surface, 0, 0)
+# translate surface so that target pixel is at 0, 0
-cairo_context.paint()
+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
-pixel = pixmap.get_image(x, y, 1, 1).get_pixel(0, 0)
+return (ord(pixels[2]), ord(pixels[1]), ord(pixels[0]), 0)
-return(int((pixel & 0xFF0000) >> 16),  # red
-       int((pixel & 0x00FF00) >> 8),  # green
-       int((pixel & 0x0000FF) >> 0), 0)  # blue
 </pre>