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

[xscreensaver] / hacks / glx / tronbit.c

diff --git a/hacks/glx/tronbit.c b/hacks/glx/tronbit.c
index 3ab69f1ddb9d67f43154e9459b709cb240fe97ee..832d329d1d65cec4f7f2e2fd75df03aa601c7b08 100644 (file)
--- a/hacks/glx/tronbit.c
+++ b/hacks/glx/tronbit.c
@@ -1,4 +1,4 @@
-/* tronbit, Copyright (c) 2011-2012 Jamie Zawinski <jwz@jwz.org>
+/* tronbit, Copyright (c) 2011-2014 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
@@ -301,7 +301,7 @@ draw_histogram (ModeInfo *mi, GLfloat ratio)
     glPushMatrix();
 
     glLoadIdentity();
-    glRotatef(current_device_rotation(), 0, 0, 1);
+    /* glRotatef(current_device_rotation(), 0, 0, 1); */
     glOrtho (0, mi->xgwa.width, 0, mi->xgwa.height, -1, 1);
 
     for (k = 0; k < overlays; k++)
@@ -316,9 +316,11 @@ draw_histogram (ModeInfo *mi, GLfloat ratio)
         j = bp->histogram_fp + 1;
         for (i = 0; i < samples; i++)
           {
-            GLfloat x = i;
-            GLfloat y = bp->histogram[j];
-            GLfloat z = 0;
+            GLfloat x, y, z;
+            if (j >= samples) j = 0;
+            x = i;
+            y = bp->histogram[j];
+            z = 0;
 
             y += (int) ((random() % 16) - 8);
             y += 16;  /* margin at bottom of screen */
@@ -327,7 +329,7 @@ draw_histogram (ModeInfo *mi, GLfloat ratio)
             y *= scaley;
 
             glVertex3f (x, y, z);
-            if (++j >= samples) j = 0;
+            ++j;
             polys++;
           }
         glEnd();
@@ -373,45 +375,22 @@ bit_handle_event (ModeInfo *mi, XEvent *event)
 {
   bit_configuration *bp = &bps[MI_SCREEN(mi)];
 
-  if (event->xany.type == ButtonPress &&
-      event->xbutton.button == Button1)
-    {
-      bp->button_down_p = True;
-      gltrackball_start (bp->trackball,
-                         event->xbutton.x, event->xbutton.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
-  else if (event->xany.type == ButtonRelease &&
-           event->xbutton.button == Button1)
-    {
-      bp->button_down_p = False;
-      return True;
-    }
-  else if (event->xany.type == ButtonPress &&
-           (event->xbutton.button == Button4 ||
-            event->xbutton.button == Button5 ||
-            event->xbutton.button == Button6 ||
-            event->xbutton.button == Button7))
-    {
-      gltrackball_mousewheel (bp->trackball, event->xbutton.button, 3,
-                              !!event->xbutton.state);
-      return True;
-    }
-  else if (event->xany.type == MotionNotify &&
-           bp->button_down_p)
-    {
-      gltrackball_track (bp->trackball,
-                         event->xmotion.x, event->xmotion.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
-    }
+  if (gltrackball_event_handler (event, bp->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &bp->button_down_p))
+    return True;
   else if (event->xany.type == KeyPress)
     {
       KeySym keysym;
       char c = 0;
       XLookupString (&event->xkey, &c, 1, &keysym, 0);
-      if (c == ' ' || c == '1' || c == '0')
+
+      if (keysym == XK_Up || keysym == XK_Left || keysym == XK_Prior)
+        c = '1';
+      else if (keysym == XK_Down || keysym == XK_Right || keysym == XK_Next)
+        c = '0';
+
+      if (c == ' ' || c == '\t' || c == '\n' || c == '1' || c == '0')
         {
           bp->kbd = c;
           return True;
@@ -428,14 +407,7 @@ init_bit (ModeInfo *mi)
   bit_configuration *bp;
   int i;
 
-  if (!bps) {
-    bps = (bit_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (bit_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-  }
+  MI_INIT (mi, bps, NULL);
 
   bp = &bps[MI_SCREEN(mi)];
 
@@ -454,7 +426,7 @@ init_bit (ModeInfo *mi)
                             spin_accel,
                             do_wander ? wander_speed : 0,
                             False);
-    bp->trackball = gltrackball_init ();
+    bp->trackball = gltrackball_init (False);
   }
 
   for (i = 0; i < countof(bp->dlists); i++)
@@ -504,9 +476,18 @@ draw_bit (ModeInfo *mi)
     }
 
   glPushMatrix ();
-  glRotatef(current_device_rotation(), 0, 0, 1);
   glScalef(1.1, 1.1, 1.1);
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+    glRotatef(o, 0, 0, 1);
+  }
+# endif
+
   {
     double x, y, z;
     get_position (bp->rot, &x, &y, &z, !bp->button_down_p);