From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz

[xscreensaver] / utils / grabscreen.h

diff --git a/utils/grabscreen.h b/utils/grabscreen.h
index cf8a96ef00a316e10e84c0707716be2933cbf52f..f0d7a0b653f37ba8c19728777fee791629ebfc6b 100644 (file)
--- a/utils/grabscreen.h
+++ b/utils/grabscreen.h
@@ -1,5 +1,4 @@
-/* xscreensaver, Copyright (c) 1992, 1993, 1994, 1997, 2001, 2003
- *  Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1992-2014 Jamie Zawinski <jwz@jwz.org>

  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that


@@ -25,15 +24,39 @@
    desktop, or from the system's video input, depending on user
    preferences.
 
    desktop, or from the system's video input, depending on user
    preferences.
 

+   When the callback is called, the image data will have been loaded
+   into the given drawable.  Copy `name' if you want to keep it.
+
+   If it is from a file, then the `filename' argument will be the name
+   of the file.  It may be NULL.  If you want to keep this string, copy it.
+
+   The size and position of the image is in the `geometry' arg.
+   The image will generally have been scaled up to fit the window, but
+   if a loaded file had a different aspect ratio than the window, it
+   will have been centered, and the returned coords will describe that.
+

    Many colors may be allocated from the window's colormap.
  */
    Many colors may be allocated from the window's colormap.
  */

-extern void load_random_image (Screen *screen,
-                               Window top_level_window,
-                               Drawable target_window_or_pixmap);
+extern void load_image_async (Screen *, Window, Drawable,
+                              void (*callback) (Screen *, Window,
+                                                Drawable,
+                                                const char *name,
+                                                XRectangle *geometry,
+                                                void *closure),
+                              void *closure);

 
 

-
-/* Uh, don't call this. */
-extern void grab_screen_image (Screen *, Window);
+/* A utility wrapper around load_image_async() that is simpler if you
+   are only loading a single image at a time: just keep calling it
+   periodically until it returns NULL.  When it does, the image has
+   been loaded.
+ */
+typedef struct async_load_state async_load_state;
+extern async_load_state *load_image_async_simple (async_load_state *,
+                                                  Screen *,
+                                                  Window top_level,
+                                                  Drawable target, 
+                                                  char **filename_ret,
+                                                  XRectangle *geometry_ret);

 
 
 /* Whether one should use GCSubwindowMode when drawing on this window
 
 
 /* Whether one should use GCSubwindowMode when drawing on this window


@@ -49,4 +72,39 @@ extern Bool use_subwindow_mode_p(Screen *screen, Window window);
  */
 extern Bool top_level_window_p(Screen *screen, Window window);
 
  */
 extern Bool top_level_window_p(Screen *screen, Window window);
 

+
+/* Don't call this: this is for the "xscreensaver-getimage" program only. */
+extern void grab_screen_image_internal (Screen *, Window);
+
+/* Don't use these: this is how "xscreensaver-getimage" and "grabclient.c"
+   pass the file name around. */
+#define XA_XSCREENSAVER_IMAGE_FILENAME "_SCREENSAVER_IMAGE_FILENAME"
+#define XA_XSCREENSAVER_IMAGE_GEOMETRY "_SCREENSAVER_IMAGE_GEOMETRY"
+
+/* For debugging: turn on verbosity. */
+extern void grabscreen_verbose (void);
+
+#ifdef HAVE_JWXYZ
+/* Don't use these: internal interface of grabclient.c. */
+extern Bool osx_grab_desktop_image (Screen *, Window, Drawable,
+                                    XRectangle *geom_ret);
+extern Bool osx_load_image_file (Screen *, Window, Drawable,
+                                 const char *filename, XRectangle *geom_ret);
+#endif /* HAVE_JWXYZ */
+
+#ifdef USE_IPHONE
+extern void ios_load_random_image (void (*callback) (void *uiimage,
+                                                     const char *filename,
+                                                     int w, int h,
+                                                     void *closure),
+                                   void *closure,
+                                   int width, int height);
+#endif /* USE_IPHONE */
+
+#ifdef HAVE_ANDROID
+char *jwxyz_load_random_image (Display *dpy,  /* utils/grabclient.c */
+                               int *width_ret, int *height_ret,
+                               char **name_ret);
+#endif
+

 #endif /* __GRABSCREEN_H__ */
 #endif /* __GRABSCREEN_H__ */