screen-capture-ubuntu.c

// screen-capture-ubuntu.c
// gcc screen-capture-ubuntu.c -o screen-capture-ubuntu `pkg-config --libs --cflags gtk+-2.0`
// http://www.bravegnu.org/gtktext/x498.html
// http://www.cs.dartmouth.edu/~campbell/cs50/project/gtk.html
// http://stackoverflow.com/questions/3124229/taking-a-screenshot-with-c-gtk
// http://stackoverflow.com/questions/11963561/screen-capture-in-haskell?lq=1
// http://askubuntu.com/questions/5847/how-to-resolve-gdk-pixbuf-gdk-pixbuf-h-no-such-file-or-directory
// https://developer.gnome.org/gdk-pixbuf/unstable/gdk-pixbuf-The-GdkPixbuf-Structure.html
// https://developer.gnome.org/gdk3/stable/gdk3-Windows.html#GdkWindow-struct
// http://stackoverflow.com/questions/126141/how-do-you-find-out-which-version-of-gtk-is-installed-on-ubuntu
// http://ubuntuforums.org/showthread.php?t=536115
// sudo apt-get install libgdk-pixbuf2.0-dev
// sudo apt-get install libgtk2.0-dev
// pkg-config --cflags gdk-pixbuf-2.0
// pkg-config --cflags gtk+-2.0
// dpkg --list | grep gdk

#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

GdkPixbuf * get_screenshot(){
 GdkPixbuf *screenshot;
 GdkWindow *root_window;
 gint x_orig, y_orig;
 gint width, height;
 root_window = gdk_get_default_root_window ();
 gdk_drawable_get_size (root_window, &width, &height);
 gdk_window_get_origin (root_window, &x_orig, &y_orig);
 screenshot = gdk_pixbuf_get_from_drawable (NULL,root_window,NULL,x_orig,y_orig,0,0,width,height);
 return screenshot;
}

void addScreenCapture(GtkWidget *window) {
 GtkWidget *image;
 GdkPixbuf *pixbuf;
 pixbuf = get_screenshot();
 image = gtk_image_new_from_pixbuf(pixbuf);
 gtk_container_add (GTK_CONTAINER (window),image);
}

int main (int argc, char *argv[]) {
 GtkWidget *window;
 /* Initialize the GTK+ and all of its supporting libraries. */
 gtk_init (&argc, &argv);
 /* Create a new window, give it a title and display it to the user. */
 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 gtk_window_set_title (GTK_WINDOW (window), "Hello World");
 //gtk_widget_show (window);
 addScreenCapture(window);
 gtk_widget_show_all (window);
 /* Hand control over to the main loop. */
 gtk_main ();
 return 0;
}