ftp://ftp.krokus.ru/pub/OpenBSD/distfiles/xscreensaver-5.01.tar.gz

[xscreensaver] / driver / xscreensaver-getimage.c

diff --git a/driver/xscreensaver-getimage.c b/driver/xscreensaver-getimage.c
index bf0feef95785248736844599af396396086a9e44..68637a7be4e2fb8662d035a293247ea48ef11993 100644 (file)
--- a/driver/xscreensaver-getimage.c
+++ b/driver/xscreensaver-getimage.c
@@ -1,4 +1,4 @@
-/* xscreensaver, Copyright (c) 2001-2004 by Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 2001-2006 by 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
@@ -101,6 +101,8 @@ typedef enum {
 #define GETIMAGE_FILE_PROGRAM    "xscreensaver-getimage-file"
 #define GETIMAGE_SCREEN_PROGRAM  "xscreensaver-getimage-desktop"
 
+extern const char *blurb (void);
+
 const char *
 blurb (void)
 {
@@ -136,6 +138,7 @@ ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
   return 0;
 }
 
+#ifndef USE_EXTERNAL_SCREEN_GRABBER
 static int
 ignore_badmatch_ehandler (Display *dpy, XErrorEvent *error)
 {
@@ -144,6 +147,7 @@ ignore_badmatch_ehandler (Display *dpy, XErrorEvent *error)
   else
     return x_ehandler (dpy, error);
 }
+#endif /* ! USE_EXTERNAL_SCREEN_GRABBER */
 
 
 /* Returns True if the given Drawable is a Window; False if it's a Pixmap.
@@ -295,6 +299,7 @@ compute_image_scaling (int src_w, int src_h,
    If out of memory, returns False, and the XImage will have been
    destroyed and freed.
  */
+#if !defined(USE_EXTERNAL_SCREEN_GRABBER) || defined(HAVE_JPEGLIB)
 static Bool
 scale_ximage (Screen *screen, Visual *visual,
               XImage *ximage, int new_width, int new_height)
@@ -342,6 +347,7 @@ scale_ximage (Screen *screen, Visual *visual,
 
   return True;
 }
+#endif /* !USE_EXTERNAL_SCREEN_GRABBER || HAVE_JPEGLIB */
 
 
 #ifdef HAVE_GDK_PIXBUF
@@ -1197,7 +1203,8 @@ get_filename_1 (Screen *screen, const char *directory, grab_type type,
 
         close (out);  /* don't need this one */
         *buf = 0;
-        fgets (buf, sizeof(buf)-1, f);
+        if (! fgets (buf, sizeof(buf)-1, f))
+          *buf = 0;
         fclose (f);
 
         /* Wait for the child to die. */
@@ -1435,6 +1442,19 @@ display_desktop (Screen *screen, Window window, Drawable drawable,
 }
 
 
+/* Whether the given Drawable is unreasonably small.
+ */
+static Bool
+drawable_miniscule_p (Display *dpy, Drawable drawable)
+{
+  Window root;
+  int xx, yy;
+  unsigned int bw, d, w = 0, h = 0;
+  XGetGeometry (dpy, drawable, &root, &xx, &yy, &w, &h, &bw, &d);
+  return (w < 32 || h < 32);
+}
+
+
 /* Grabs an image (from a file, video, or the desktop) and renders it on
    the Drawable.  If `file' is specified, always use that file.  Otherwise,
    select randomly, based on the other arguments.
@@ -1451,7 +1471,6 @@ get_image (Screen *screen,
 {
   Display *dpy = DisplayOfScreen (screen);
   grab_type which = GRAB_BARS;
-  int count = 0;
   struct stat st;
   const char *file_prop = 0;
   XRectangle geom = { 0, 0, 0, 0 };
@@ -1519,6 +1538,15 @@ get_image (Screen *screen,
       image_p = False;
     }
 
+  /* If the target drawable is really small, no good can come of that.
+     Always do colorbars in that case.
+   */
+  if (drawable_miniscule_p (dpy, drawable))
+    {
+      desk_p  = False;
+      video_p = False;
+      image_p = False;
+    }
 
 # ifndef _VROOT_H_
 #  error Error!  This file definitely needs vroot.h!
@@ -1546,24 +1574,28 @@ get_image (Screen *screen,
     }
 # endif /* !USE_EXTERNAL_SCREEN_GRABBER */
 
-  count = 0;
-  if (desk_p)  count++;
-  if (video_p) count++;
-  if (image_p) count++;
-
-  if (count == 0)
+  if (! (desk_p || video_p || image_p))
     which = GRAB_BARS;
   else
     {
       int i = 0;
-      while (1)  /* loop until we get one that's permitted */
-        {
-          which = (random() % 3);
-          if (which == GRAB_DESK  && desk_p)  break;
-          if (which == GRAB_VIDEO && video_p) break;
-          if (which == GRAB_FILE  && image_p) break;
-          if (++i > 200) abort();
-        }
+      int n;
+      /* Loop until we get one that's permitted.
+         If files or video are permitted, do them more often
+         than desktop.
+
+             D+V+I: 10% + 45% + 45%.
+             V+I:   50% + 50%
+             D+V:   18% + 82%
+             D+I:   18% + 82%
+       */
+    AGAIN:
+      n = (random() % 100);
+      if (++i > 300) abort();
+      else if (desk_p  && n < 10) which = GRAB_DESK;   /* 10% */
+      else if (video_p && n < 55) which = GRAB_VIDEO;  /* 45% */
+      else if (image_p)           which = GRAB_FILE;   /* 45% */
+      else goto AGAIN;
     }
 
 
@@ -1765,7 +1797,7 @@ main (int argc, char **argv)
 
   memset (&P, 0, sizeof(P));
   P.db = db;
-  load_init_file (&P);
+  load_init_file (dpy, &P);
 
   progname = argv[0] = oprogname;