Implement BG callback

2016-12-31 13:50:44 +09:00
parent 4eb6a1fc98
commit e4deae3b69
4 changed files with 36 additions and 2 deletions
--- a/SMILEBASIC/petitcomputer.d
+++ b/SMILEBASIC/petitcomputer.d
@@ -526,6 +526,16 @@ class PetitComputer
        SDL_SetWindowSize(window, cast(int)(currentDisplay.windowSize.width * scaleX), cast(int)(currentDisplay.windowSize.height * scaleY));
    }

+    bool isValidLayer(int layer)
+    {
+        if (layer < 0)
+            return false;
+        if(displaynum)
+        {
+            return layer < bg.length - bgmax;
+        }
+        return layer < bgmax;
+    }
    BG getBG(int layer)
    {
        if(displaynum)