Update palette only when screen buffers flip

Previously, any palette updates would be immediately visible, but any
screen updates would draw to the back buffer and would only become
visible when the back buffer was copied to the front buffer. This could
result in a flash of a new palette before the new screen had a chance
to draw and become visible.

To prevent this, a second palette was created to receive palette
updates, with the updates only being copied to the visible palette when
the screen buffers flip.

1 files changed, 2 insertions, 19 deletions

diff --git a/arm9/source/main.c b/arm9/source/main.c
index 8be7837..095e089 100644
--- a/arm9/source/main.c
+++ b/arm9/source/main.c
@@ -37,23 +37,6 @@ void receive_input(void) {
 }
 
 
-Screen scr_main = {
-    .bgv = BG_TILE_RAM(BG_SLOT_VIS),
-    .fgv = BG_TILE_RAM(FG_SLOT_VIS),
-    .bg  = BG_TILE_RAM(BG_SLOT),
-    .fg  = BG_TILE_RAM(FG_SLOT),
-    .map = BG_MAP_RAM(MAP_SLOT),
-    .pal = BG_PALETTE,
-};
-Screen scr_sub = {
-    .bgv = BG_TILE_RAM_SUB(BG_SLOT_VIS),
-    .fgv = BG_TILE_RAM_SUB(FG_SLOT_VIS),
-    .bg  = BG_TILE_RAM_SUB(BG_SLOT),
-    .fg  = BG_TILE_RAM_SUB(FG_SLOT),
-    .map = BG_MAP_RAM_SUB(MAP_SLOT),
-    .pal = BG_PALETTE_SUB,
-};
-
 int main(void) {
     #define ALIVE(br)  (br && br->alive)
     #define AWAKE(br)  (br && br->alive &&  br->awake)
@@ -79,8 +62,8 @@ int main(void) {
     start_br(&br[1], keyboard_program, sizeof(keyboard_program));
     br_main = &br[0];
     br_sub = &br[1];
-    br_main->scr.nds = &scr_main;
-    br_sub->scr.nds = &scr_sub;
+    scr_make_main(&br_main->scr);
+    scr_make_sub(&br_sub->scr);
 
     while (1) {
         if (AWAKE(br_main)) run_br(br_main);