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

[xscreensaver] / hacks / glx / extrusion.c

diff --git a/hacks/glx/extrusion.c b/hacks/glx/extrusion.c
index 7e98f5e3bf924524049e5cf24b065702a6081a73..c61f27a3ed9d1093ebb03fc05ed75f665bb1b532 100644 (file)
--- a/hacks/glx/extrusion.c
+++ b/hacks/glx/extrusion.c
@@ -116,7 +116,7 @@ ENTRYPOINT ModeSpecOpt extrusion_opts = {countof(opts), opts, countof(vars), var
 
 #ifdef USE_MODULES
 ModStruct   extrusion_description =
-{"extrusion", "init_extrusion", "draw_extrusion", "release_extrusion",
+{"extrusion", "init_extrusion", "draw_extrusion", NULL,
  "draw_extrusion", "init_extrusion", NULL, &extrusion_opts,
  1000, 1, 2, 1, 4, 1.0, "",
  "OpenGL extrusion", 0, NULL};
@@ -218,11 +218,16 @@ static void Create_Texture(ModeInfo *mi, const char *filename)
   int format;
 
   if ( !strncmp(filename, "BUILTIN", 7))
-    image = Generate_Image(&width, &height, &format);
+    {
+    BUILTIN:
+      image = Generate_Image(&width, &height, &format);
+    }
   else
     {
       XImage *ximage = xpm_file_to_ximage (MI_DISPLAY (mi), MI_VISUAL (mi),
                                            MI_COLORMAP (mi), filename);
+      if (!ximage)
+        goto BUILTIN;
       image  = (GLubyte *) ximage->data;
       width  = ximage->width;
       height = ximage->height;
@@ -285,7 +290,7 @@ init_rotation (ModeInfo *mi)
                           0.2,
                           0.005,
                           True);
-  gp->trackball = gltrackball_init ();
+  gp->trackball = gltrackball_init (True);
 
   lastx = (random() % (int) (max_lastx - min_lastx)) + min_lastx;
   lasty = (random() % (int) (max_lasty - min_lasty)) + min_lasty;
@@ -438,11 +443,14 @@ initializeGL(ModeInfo *mi, GLsizei width, GLsizei height)
   glViewport( 0, 0, width, height ); 
 
   glEnable(GL_DEPTH_TEST);
-  glClearColor(0,0,0,0);
   glDisable (GL_CULL_FACE);
   glLightModeli (GL_LIGHT_MODEL_TWO_SIDE, True);
   glShadeModel(GL_SMOOTH);
 
+# ifdef HAVE_JWZGLES /* #### glPolygonMode other than GL_FILL unimplemented */
+  MI_IS_WIREFRAME(mi) = 0;
+# endif
+
   if (do_light)
        SetupLight();
   if (MI_IS_WIREFRAME(mi)) {
@@ -481,46 +489,34 @@ extrusion_handle_event (ModeInfo *mi, XEvent *event)
        event->xbutton.button == Button6 ||
        event->xbutton.button == Button7))
     {
-      gltrackball_mousewheel (gp->trackball, event->xbutton.button, 10,
-                              !!event->xbutton.state);
-      return True;
     }
   else if (event->xany.type == ButtonPress &&   /* rotate with left button */
            !event->xbutton.state)              /* if no modifier keys */
     {
-      gp->button_down_p = True;
-      gltrackball_start (gp->trackball,
-                         event->xbutton.x, event->xbutton.y,
-                         MI_WIDTH (mi), MI_HEIGHT (mi));
-      return True;
     }
   else if (event->xany.type == ButtonPress)  /* deform with other buttons */
     {                                        /* or with modifier keys */
       gp->button2_down_p = True;
-      gp->mouse_start_x = gp->mouse_x = event->xbutton.x;
-      gp->mouse_start_y = gp->mouse_y = event->xbutton.y;
-      return True;
     }
   else if (event->xany.type == ButtonRelease)
     {
       gp->button_down_p = False;
       gp->button2_down_p = False;
-      return True;
     }
   else if (event->xany.type == MotionNotify)
     {
-      if (gp->button_down_p)
-        gltrackball_track (gp->trackball,
-                           event->xmotion.x, event->xmotion.y,
-                           MI_WIDTH (mi), MI_HEIGHT (mi));
       if (gp->button2_down_p)
         {
           gp->mouse_x = event->xmotion.x;
           gp->mouse_y = event->xmotion.y;
         }
-      return True;
     }
 
+  if (gltrackball_event_handler (event, gp->trackball,
+                                 MI_WIDTH (mi), MI_HEIGHT (mi),
+                                 &gp->button_down_p))
+    return True;
+
   return False;
 }
 
@@ -534,11 +530,7 @@ init_extrusion (ModeInfo * mi)
 
   if (MI_IS_WIREFRAME(mi)) do_light = 0;
 
-  if (Extrusion == NULL) {
-       if ((Extrusion = (extrusionstruct *)
-         calloc(MI_NUM_SCREENS(mi), sizeof (extrusionstruct))) == NULL)
-         return;
-  }
+  MI_INIT(mi, Extrusion, NULL);
   gp = &Extrusion[screen];
 
   gp->window = MI_WINDOW(mi);