On 6/23/05, Cheok Yan Cheng <yccheok@xxxxxxxxx> wrote: > currently I plan to work on an application which can > open a VERY large image (>80 MEG) in a very fast > manner. there is no delay while user trying to scroll > along the image. currently, when i open an large image > with GIMP, i can feel the loading and scrolling delay. > > i was wondering which GTK+ module i should > start looking at? I maintain a program which can display very large images (>10 GBytes) with gtk: http://www.vips.ecs.soton.ac.uk/ I do image display with a GtkDrawingArea inside a GtkScrolledWindow. In the expose handler I generate the part of the image which has been exposed and paint it to the screen with gdk_draw_rgb_image(). There are some complications: If you need to draw geometry over the top of the image, you need to do translation and clipping yourself if the lines are going to go over 16 bits in any direction. Also, very large scrolled windows do not currently work well with the win32 backend (I think a fix is coming soon for this). John _______________________________________________ gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
