From 14e371c91150f35013723759069d42a6108e46c8 Mon Sep 17 00:00:00 2001
From: Gwilym Kuiper <gw@ilym.me>
Date: Sat, 30 Jul 2022 22:42:01 +0100
Subject: [PATCH] Run the GC after copying the tiles rather than before

---
 agb/src/display/tiled/map.rs | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/agb/src/display/tiled/map.rs b/agb/src/display/tiled/map.rs
index fbe5b698..c1519e4e 100644
--- a/agb/src/display/tiled/map.rs
+++ b/agb/src/display/tiled/map.rs
@@ -112,22 +112,20 @@ impl RegularMap {
         self.bg_h_offset().set(self.x_scroll);
         self.bg_v_offset().set(self.y_scroll);
 
-        vram.gc();
-
-        if !self.tiles_dirty {
-            return;
-        }
-
         let screenblock_memory = self.screenblock_memory();
 
-        unsafe {
-            dma_copy16(
-                self.tiles.as_ptr() as *const u16,
-                screenblock_memory,
-                self.size.num_tiles(),
-            );
+        if self.tiles_dirty {
+            unsafe {
+                dma_copy16(
+                    self.tiles.as_ptr() as *const u16,
+                    screenblock_memory,
+                    self.size.num_tiles(),
+                );
+            }
         }
 
+        vram.gc();
+
         self.tiles_dirty = false;
     }