From 39e6bdf094ac1b53109782c9b5b98c211bbe3149 Mon Sep 17 00:00:00 2001
From: scnorton <scnorton@biociphers.org>
Date: Mon, 18 Sep 2017 14:04:00 -0400
Subject: [PATCH] sub_81BF7E8

---
 asm/berry_fix_program.s | 96 -----------------------------------------
 include/bg.h            |  4 ++
 src/berry_fix_program.c | 33 +++++++++++++-
 3 files changed, 36 insertions(+), 97 deletions(-)

diff --git a/asm/berry_fix_program.s b/asm/berry_fix_program.s
index 50771f338b..3dfc07fa8e 100755
--- a/asm/berry_fix_program.s
+++ b/asm/berry_fix_program.s
@@ -5,102 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_81BF7E8
-sub_81BF7E8: @ 81BF7E8
-	push {r4-r6,lr}
-	sub sp, 0xC
-	adds r6, r0, 0
-	movs r0, 0x20
-	str r0, [sp]
-	str r0, [sp, 0x4]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0
-	movs r3, 0
-	bl FillBgTilemapBufferRect_Palette0
-	movs r0, 0x1
-	movs r1, 0xAA
-	bl FillWindowPixelBuffer
-	ldr r0, =gUnknown_08618158
-	str r0, [sp]
-	movs r0, 0x1
-	negs r0, r0
-	str r0, [sp, 0x4]
-	ldr r0, =gUnknown_08618160
-	lsls r4, r6, 2
-	adds r0, r4, r0
-	ldr r0, [r0]
-	str r0, [sp, 0x8]
-	movs r0, 0x1
-	movs r1, 0x1
-	movs r2, 0
-	movs r3, 0
-	bl box_print
-	movs r0, 0x1
-	bl PutWindowTilemap
-	movs r0, 0x1
-	movs r1, 0x2
-	bl CopyWindowToVram
-	cmp r6, 0x5
-	bhi _081BF87E
-	ldr r0, =_081BF850
-	adds r0, r4, r0
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_081BF850:
-	.4byte _081BF868
-	.4byte _081BF870
-	.4byte _081BF868
-	.4byte _081BF868
-	.4byte _081BF868
-	.4byte _081BF878
-_081BF868:
-	movs r0, 0x2
-	bl PutWindowTilemap
-	b _081BF87E
-_081BF870:
-	movs r0, 0x3
-	bl PutWindowTilemap
-	b _081BF87E
-_081BF878:
-	movs r0, 0
-	bl PutWindowTilemap
-_081BF87E:
-	movs r0, 0
-	bl CopyBgTilemapBufferToVram
-	ldr r5, =gUnknown_08618178
-	lsls r4, r6, 1
-	adds r4, r6
-	lsls r4, 2
-	adds r0, r4, r5
-	ldr r0, [r0]
-	ldr r1, =0x06004000
-	bl LZ77UnCompVram
-	adds r0, r5, 0x4
-	adds r0, r4, r0
-	ldr r0, [r0]
-	ldr r1, =0x0600f800
-	bl LZ77UnCompVram
-	adds r5, 0x8
-	adds r4, r5
-	ldr r0, [r4]
-	movs r1, 0xA0
-	lsls r1, 19
-	ldr r2, =0x04000040
-	bl CpuSet
-	movs r0, 0
-	bl ShowBg
-	movs r0, 0x1
-	bl ShowBg
-	add sp, 0xC
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81BF7E8
-
 	thumb_func_start sub_81BF8D8
 sub_81BF8D8: @ 81BF8D8
 	push {lr}
diff --git a/include/bg.h b/include/bg.h
index 7a0782c1b7..444d3f3c2e 100644
--- a/include/bg.h
+++ b/include/bg.h
@@ -15,5 +15,9 @@ void ResetBgsAndClearDma3BusyFlags(u32);
 void InitBgsFromTemplates(u8, const struct BgTemplate *, u8);
 u32 ChangeBgX(u8, u32, u8);
 u32 ChangeBgY(u8, u32, u8);
+void FillBgTilemapBufferRect_Palette0(u8 bg, u16 tileNum, u8 x, u8 y, u8 width, u8 height);
+void ShowBg(u8);
+void HideBg(u8);
+void CopyBgTilemapBufferToVram(u8);
 
 #endif //GUARD_bg_H
diff --git a/src/berry_fix_program.c b/src/berry_fix_program.c
index b63bc12beb..6f4c1c79e6 100644
--- a/src/berry_fix_program.c
+++ b/src/berry_fix_program.c
@@ -31,7 +31,7 @@ extern berryfix_t *gUnknown_030012B8;
 static void sub_81BF3DC(void);
 static void sub_81BF5A4(void);
 static int sub_81BF7A4(int);
-void sub_81BF7E8(int);
+static void sub_81BF7E8(int);
 void sub_81BF8D8(int);
 
 // .rodata
@@ -48,6 +48,8 @@ extern const struct WindowTemplate gUnknown_08618110[7];
 extern const u16 gUnknown_08618138[16];
 extern const u8 gUnknown_08618158[3];
 extern const u8 gUnknown_0861815B[3];
+extern const u8 *const gUnknown_08618160[6];
+extern const u8 *const gUnknown_08618178[6][3];
 
 // .text
 
@@ -454,3 +456,32 @@ __attribute__((naked)) static int sub_81BF7A4(int checkval)
 }
 #endif
 
+static void sub_81BF7E8(int scene)
+{
+    FillBgTilemapBufferRect_Palette0(0, 0, 0, 0, 32, 32);
+    FillWindowPixelBuffer(1, 0xAA);
+    box_print(1, 1, 0, 0, gUnknown_08618158, -1, gUnknown_08618160[scene]);
+    PutWindowTilemap(1);
+    CopyWindowToVram(1, 2);
+    switch (scene)
+    {
+        case 0:
+        case 2:
+        case 3:
+        case 4:
+            PutWindowTilemap(2);
+            break;
+        case 1:
+            PutWindowTilemap(3);
+            break;
+        case 5:
+            PutWindowTilemap(0);
+            break;
+    }
+    CopyBgTilemapBufferToVram(0);
+    LZ77UnCompVram(gUnknown_08618178[scene][0], (void *)BG_CHAR_ADDR(1));
+    LZ77UnCompVram(gUnknown_08618178[scene][1], (void *)BG_SCREEN_ADDR(31));
+    CpuCopy32(gUnknown_08618178[scene][2], (void *)BG_PLTT, 0x100);
+    ShowBg(0);
+    ShowBg(1);
+}