object priority

src/processor/gpu.rs

@@ -10,6 +10,8 @@ use crate::{
 };
 use minifb::{Window, WindowOptions};
 
+use super::SplitRegister;
+
 mod tile_window;
 mod types;
 
@@ -301,12 +303,18 @@ impl CPU {
                         x_flip: get_bit(flags, 5),
                         palette: byte_to_palette(self.memory.get(palette_addr)),
                     },
+                    oam_location: (i - 0xFE00) as u8,
                 });
-                if objs.len() >= 10 {
-                    break;
-                }
             }
         }
+        objs.sort_by_key(|o| {
+            let mut v: u16 = 0x0;
+            v.set_high(o.x);
+            v.set_low(o.oam_location);
+            v
+        });
+        objs.reverse();
+        objs.truncate(10);
         objs
     }
 

src/processor/gpu/types.rs

@@ -109,4 +109,5 @@ pub(super) struct Object {
     pub(super) y: u8,
     pub(super) tile_index: u8,
     pub(super) flags: ObjectFlags,
+    pub(super) oam_location: u8,
 }