ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...

[xscreensaver] / utils / overlay.c

diff --git a/utils/overlay.c b/utils/overlay.c
deleted file mode 100644 (file)
index c9faef8..0000000
--- a/utils/overlay.c
+++ /dev/null
@@ -1,126 +0,0 @@
-/* xscreensaver, Copyright (c) 1997 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
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation.  No representations are made about the suitability of this
- * software for any purpose.  It is provided "as is" without express or 
- * implied warranty.
- */
-
-/* If the server's root window contains a SERVER_OVERLAY_VISUALS property,
-   then that identifies the visuals which correspond to the video hardware's
-   overlay planes.  Windows created in these kinds of visuals have the
-   property that one particular pixel value is transparent.
-
-   On my Indy, there are two transparent visuals, one of which is at layer 1,
-   and one of which is at layer 2.  This is apparently the ordering in which
-   they are overlayed (1 being topmost.)  The other difference between them
-   is that the topmost one only has 2 planes, while the next one has 8.
-
-   Rumor has it that SGI, HP, DEC, and IBM all use the same mechanism.
-
-   This code selects the topmost one, regardless of depth.  Maybe that's not
-   the right thing.  Well, in XScreenSaver, we only need to allocate two
-   colors from it (it's only used to display the stderr output, so that the
-   text can overlay the graphics without being obliterated by it.)
- */
-
-
-#include "utils.h"
-
-#include <X11/Xutil.h>
-#include <X11/Xproto.h>
-
-#include "visual.h"
-
-
-struct overlay_data
-{
-  CARD32 visual_id;
-  CARD32 transparency; /* 0: none; 1: pixel; 2: mask (?) */
-  CARD32 value;                /* the transparent pixel */
-  CARD32 layer;                /* -1: underlay; 0: normal; 1: popup; 2: overlay */
-};
-
-static int
-get_overlay_prop (Screen *screen, struct overlay_data **data_ret)
-{
-  int result;
-  Atom actual_type;
-  int actual_format;
-  unsigned long nitems, bytes_after;
-  struct overlay_data *data = 0;
-  Display *dpy = DisplayOfScreen(screen);
-  Window window = RootWindowOfScreen(screen);
-  Atom XA_SERVER_OVERLAY_VISUALS =
-    XInternAtom (dpy, "SERVER_OVERLAY_VISUALS", False);
-
-  *data_ret = 0;
-  result = XGetWindowProperty (dpy, window, XA_SERVER_OVERLAY_VISUALS,
-                              0, (65536 / sizeof (long)), False, 
-                              XA_SERVER_OVERLAY_VISUALS,
-                              &actual_type, &actual_format,
-                              &nitems, &bytes_after,
-                              (unsigned char **) &data);
-  if (result != Success ||
-      actual_type != XA_SERVER_OVERLAY_VISUALS ||
-      actual_format != 32 ||
-      nitems < 1)
-    {
-      if (data) XFree(data);
-      return 0;
-    }
-  else
-    {
-      *data_ret = data;
-      return nitems / (sizeof(*data) / sizeof(CARD32));
-    }
-}
-
-
-Visual *
-get_overlay_visual (Screen *screen, unsigned long *transparent_pixel_ret)
-{
-  struct overlay_data *data = 0;
-  int n_visuals = get_overlay_prop (screen, &data);
-  Visual *visual = 0;
-  int depth = 0;
-  unsigned long pixel = 0;
-  unsigned int layer = 0;
-  int i;
-
-  if (data)
-    for (i = 0; i < n_visuals; i++)
-
-      /* Only accept ones that have a transparent pixel. */
-      if (data[i].transparency == 1)
-       {
-         XVisualInfo vi_in, *vi_out;
-         int out_count;
-         vi_in.visualid = data[i].visual_id;
-         vi_out = XGetVisualInfo (DisplayOfScreen(screen), VisualIDMask,
-                                  &vi_in, &out_count);
-         if (vi_out)
-           {
-             /* Prefer the one at the topmost layer; after that, prefer
-                the one with the greatest depth (most colors.) */
-             if (layer < data[i].layer ||
-                 (layer == data[i].layer &&
-                  depth < vi_out[0].depth))
-               {
-                 visual = vi_out[0].visual;
-                 depth  = vi_out[0].depth;
-                 layer  = data[i].layer;
-                 pixel  = data[i].value;
-               }
-             XFree(vi_out);
-           }
-       }
-
-  if (data) XFree(data);
-  if (visual && transparent_pixel_ret)
-    *transparent_pixel_ret = pixel;
-  return visual;
-}