Hi, I have a function that tries to draw a point at (x,y) in a GdkPixbuf and I am using the formula: guchar *p; p = pixels + y * rowstride + x * n_channels; to locate the point in the pixbuf. I have used gdk_functions to get the 'pixels' value which is start of the pixbuf-values and the rowstride, n_channels and has_alpha. I checked the value of 'rowstride' and it was 2800 for my pixbuf and 'n_channels' was 4. However when I try to set the rgb-values for the pixel (x,y) I get a segmentation fault...? The code I have used is: -> *p++ = 0xff; *p++ = 0; *p++ = 0xfc; *p = has_alpha; The segmentation fault occurs at the arrow. I guess you can use gdk_draw_point() instead but I want to make the code a bit faster and use a function that can draw many pixels at once in a single function. magnus m _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list