![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/gtk-tpdfv-screen.c b/src/gtk-tpdfv-screen.c
--- /dev/null
+++ b/src/gtk-tpdfv-screen.c
@@ -0,0 +1,146 @@
+/*
+ * tpdfview - src/gtk-tpdfv-screen.c
+ * Copyright (C) 2011 Sebastian 'tokkee' Harl <sh@tokkee.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This module provides an abstraction layer for virtual screens.
+ */
+
+#include "gtk-tpdfv.h"
+
+#include <assert.h>
+#include <errno.h>
+
+#include <gtk/gtk.h>
+
+#include <stdlib.h>
+
+typedef struct {
+ GdkScreen *screen;
+ gint n_monitor;
+
+ gint x;
+ gint y;
+ gint width;
+ gint height;
+} screen_t;
+
+struct gtk_tpdfv_screens {
+ gint num_screens;
+ screen_t *screens;
+};
+
+/*
+ * Private helper functions.
+ */
+
+
+/*
+ * Public API.
+ */
+
+gtk_tpdfv_screens_t *
+gtk_tpdfv_screens_init(const gchar *display_name)
+{
+ gtk_tpdfv_screens_t *screens;
+
+ GdkDisplay *gdk_disp;
+ gint screens_count;
+
+ gint i;
+
+ if (display_name)
+ gdk_disp = gdk_display_open(display_name);
+ else
+ gdk_disp = gdk_display_get_default();
+
+ if (! gdk_disp)
+ return NULL;
+
+ screens = (gtk_tpdfv_screens_t *)malloc(sizeof(*screens));
+ if (! screens)
+ return NULL;
+
+ screens->screens = NULL;
+ screens->num_screens = 0;
+
+ screens_count = gdk_display_get_n_screens(gdk_disp);
+ for (i = 0; i < screens_count; ++i) {
+ GdkScreen *gdk_screen = gdk_display_get_screen(gdk_disp, i);
+
+ gint monitors_count = gdk_screen_get_n_monitors(gdk_screen);
+ gint j;
+
+ for (j = 0; j < monitors_count; ++j) {
+ screen_t *screen;
+
+ GdkRectangle geo;
+
+ screen = (screen_t *)realloc(screens->screens,
+ (size_t)(screens->num_screens + 1) * sizeof(*screen));
+ if (! screen) {
+ if (screens->screens)
+ free(screens->screens);
+ free(screens);
+ return NULL;
+ }
+
+ screens->screens = screen;
+ screen = screens->screens + screens->num_screens;
+ ++screens->num_screens;
+
+ screen->screen = gdk_screen;
+ screen->n_monitor = j;
+
+ gdk_screen_get_monitor_geometry(gdk_screen, j, &geo);
+ screen->x = geo.x; screen->y = geo.y;
+ screen->width = geo.width; screen->height = geo.height;
+ }
+ }
+ return screens;
+} /* gtk_tpdfv_new */
+
+void
+gtk_tpdfv_screens_destroy(gtk_tpdfv_screens_t *screens)
+{
+ if (! screens)
+ return;
+
+ if (screens->screens)
+ free(screens->screens);
+ free(screens);
+} /* gtk_tpdfv_destroy_screens */
+
+gint
+gtk_tpdfv_screens_number(const gtk_tpdfv_screens_t *screens)
+{
+ if (! screens)
+ return -1;
+ return screens->num_screens;
+} /* gtk_tpdfv_screens_number */
+
+/* vim: set tw=78 sw=4 ts=4 noexpandtab : */
+