X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=src%2Fbackground.cpp;h=56506e5ba592b45eaa5fd3a7b2da9254a72ef9c5;hb=875ef8eb7e93726bc67dfa7f05da946250e588d4;hp=b8d0ecc945d3998e849967bcdba0600031e66986;hpb=1e7faec8333b84dc75c9f1eaf3eab3d5821fa14a;p=supertux.git

diff --git a/src/background.cpp b/src/background.cpp
index b8d0ecc94..56506e5ba 100644
--- a/src/background.cpp
+++ b/src/background.cpp
@@ -17,6 +17,8 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#include <config.h>
+
 #include "background.h"
 #include "app/globals.h"
 #include "camera.h"
@@ -24,13 +26,14 @@
 #include "utils/lispwriter.h"
 
 Background::Background()
-  : type(INVALID), image(0)
+  : type(INVALID), layer(LAYER_BACKGROUND0), image(0)
 {
 }
 
 Background::Background(LispReader& reader)
-  : type(INVALID), image(0)
+  : type(INVALID), layer(LAYER_BACKGROUND0), image(0)
 {
+  reader.read_int("layer", layer);
   if(reader.read_string("image", imagefile) 
       && reader.read_float("speed", speed)) {
     set_image(imagefile, speed);
@@ -69,6 +72,7 @@ Background::write(LispWriter& writer)
     writer.write_int_vector("top_color", bkgd_top_color);
     writer.write_int_vector("bottom_color", bkgd_bottom_color);
   }
+  writer.write_int("layer", layer);
   
   writer.end_list("background");
 }
@@ -107,24 +111,25 @@ Background::draw(DrawingContext& context)
     /* In case we are using OpenGL just draw the gradient, else (software mode)
         use the cache. */
     if(use_gl)
-      context.draw_gradient(gradient_top, gradient_bottom, LAYER_BACKGROUND0);
+      context.draw_gradient(gradient_top, gradient_bottom, layer);
     else
       {
       context.push_transform();
       context.set_translation(Vector(0, 0));
-      context.draw_surface(image, Vector(0, 0), LAYER_BACKGROUND0);
+      context.draw_surface(image, Vector(0, 0), layer);
       context.pop_transform();
       }
   } else if(type == IMAGE) {
-    int sx = int(-context.get_translation().x * speed)
-      % image->w - image->w;
-    int sy = int(-context.get_translation().y * speed)
-      % image->h - image->h;
+    if(!image)
+      return;
+    
+    int sx = int(-context.get_translation().x * speed) % image->w - image->w;
+    int sy = int(-context.get_translation().y * speed) % image->h - image->h;
     context.push_transform();
     context.set_translation(Vector(0, 0));
     for(int x = sx; x < screen->w; x += image->w)
       for(int y = sy; y < screen->h; y += image->h)
-        context.draw_surface(image, Vector(x, y), LAYER_BACKGROUND0);
+        context.draw_surface(image, Vector(x, y), layer);
     context.pop_transform();
   }
 }