decompile field_region_map

3 files changed, 135 insertions, 275 deletions

diff --git a/asm/field_region_map.s b/asm/field_region_map.s
deleted file mode 100644
index 37c97c3ec..000000000
--- a/asm/field_region_map.s
+++ /dev/null
@@ -1,274 +0,0 @@
-	.include "constants/gba_constants.inc"
-	.include "constants/species_constants.inc"
-	.include "asm/macros.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start FieldInitRegionMap
-FieldInitRegionMap: @ 813EEB4
-	push {r4,lr}
-	adds r4, r0, 0
-	movs r0, 0
-	bl SetVBlankCallback
-	ldr r2, _0813EED8 @ =0x02000000
-	ldr r0, _0813EEDC @ =0x00000888
-	adds r1, r2, r0
-	movs r0, 0
-	strh r0, [r1]
-	str r4, [r2]
-	ldr r0, _0813EEE0 @ =CB2_FieldInitRegionMap
-	bl SetMainCallback2
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0813EED8: .4byte 0x02000000
-_0813EEDC: .4byte 0x00000888
-_0813EEE0: .4byte CB2_FieldInitRegionMap
-	thumb_func_end FieldInitRegionMap
-
-	thumb_func_start CB2_FieldInitRegionMap
-CB2_FieldInitRegionMap: @ 813EEE4
-	push {r4,lr}
-	sub sp, 0x4
-	movs r0, 0x80
-	lsls r0, 19
-	movs r1, 0
-	strh r1, [r0]
-	adds r0, 0x10
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	adds r0, 0x2
-	strh r1, [r0]
-	bl ResetSpriteData
-	bl FreeAllSpritePalettes
-	ldr r0, _0813EF98 @ =0x02000008
-	movs r1, 0
-	bl sub_80FA8EC
-	movs r0, 0
-	movs r1, 0
-	bl sub_80FBCF0
-	movs r0, 0x1
-	movs r1, 0x1
-	bl sub_80FBB3C
-	ldr r4, _0813EF9C @ =gWindowConfig_81E709C
-	adds r0, r4, 0
-	bl SetUpWindowConfig
-	adds r0, r4, 0
-	bl InitMenuWindow
-	bl MenuZeroFillScreen
-	ldr r1, _0813EFA0 @ =REG_BG0CNT
-	movs r2, 0xF8
-	lsls r2, 5
-	adds r0, r2, 0
-	strh r0, [r1]
-	movs r0, 0x15
-	movs r1, 0
-	movs r2, 0x1D
-	movs r3, 0x3
-	bl MenuDrawTextWindow
-	ldr r0, _0813EFA4 @ =gOtherText_Hoenn
-	movs r1, 0x16
-	movs r2, 0x1
-	movs r3, 0x38
-	bl sub_8072BD8
-	movs r0, 0x10
-	movs r1, 0x10
-	movs r2, 0x1D
-	movs r3, 0x13
-	bl MenuDrawTextWindow
-	bl sub_813F0C8
-	ldr r0, _0813EFA8 @ =CB2_FieldRegionMap
-	bl SetMainCallback2
-	ldr r0, _0813EFAC @ =VBlankCB_FieldRegionMap
-	bl SetVBlankCallback
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0x10
-	movs r3, 0
-	bl BeginNormalPaletteFade
-	add sp, 0x4
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0813EF98: .4byte 0x02000008
-_0813EF9C: .4byte gWindowConfig_81E709C
-_0813EFA0: .4byte REG_BG0CNT
-_0813EFA4: .4byte gOtherText_Hoenn
-_0813EFA8: .4byte CB2_FieldRegionMap
-_0813EFAC: .4byte VBlankCB_FieldRegionMap
-	thumb_func_end CB2_FieldInitRegionMap
-
-	thumb_func_start VBlankCB_FieldRegionMap
-VBlankCB_FieldRegionMap: @ 813EFB0
-	push {lr}
-	bl LoadOam
-	bl ProcessSpriteCopyRequests
-	bl TransferPlttBuffer
-	pop {r0}
-	bx r0
-	thumb_func_end VBlankCB_FieldRegionMap
-
-	thumb_func_start CB2_FieldRegionMap
-CB2_FieldRegionMap: @ 813EFC4
-	push {lr}
-	bl sub_813EFDC
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl UpdatePaletteFade
-	pop {r0}
-	bx r0
-	thumb_func_end CB2_FieldRegionMap
-
-	thumb_func_start sub_813EFDC
-sub_813EFDC: @ 813EFDC
-	push {lr}
-	sub sp, 0x4
-	ldr r1, _0813EFF8 @ =0x02000000
-	ldr r2, _0813EFFC @ =0x00000888
-	adds r0, r1, r2
-	ldrh r0, [r0]
-	adds r2, r1, 0
-	cmp r0, 0x4
-	bhi _0813F0B8
-	lsls r0, 2
-	ldr r1, _0813F000 @ =_0813F004
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.align 2, 0
-_0813EFF8: .4byte 0x02000000
-_0813EFFC: .4byte 0x00000888
-_0813F000: .4byte _0813F004
-	.align 2, 0
-_0813F004:
-	.4byte _0813F018
-	.4byte _0813F030
-	.4byte _0813F04C
-	.4byte _0813F078
-	.4byte _0813F0A0
-_0813F018:
-	movs r1, 0x80
-	lsls r1, 19
-	ldr r3, _0813F028 @ =0x00001541
-	adds r0, r3, 0
-	strh r0, [r1]
-	ldr r0, _0813F02C @ =0x00000888
-	adds r1, r2, r0
-	b _0813F08E
-	.align 2, 0
-_0813F028: .4byte 0x00001541
-_0813F02C: .4byte 0x00000888
-_0813F030:
-	ldr r0, _0813F044 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _0813F0B8
-	ldr r3, _0813F048 @ =0x00000888
-	adds r1, r2, r3
-	b _0813F08E
-	.align 2, 0
-_0813F044: .4byte gPaletteFade
-_0813F048: .4byte 0x00000888
-_0813F04C:
-	bl sub_80FAB60
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x3
-	bne _0813F05E
-	bl sub_813F0C8
-	b _0813F0B8
-_0813F05E:
-	cmp r0, 0x3
-	blt _0813F0B8
-	cmp r0, 0x5
-	bgt _0813F0B8
-	ldr r1, _0813F070 @ =0x02000000
-	ldr r0, _0813F074 @ =0x00000888
-	adds r1, r0
-	b _0813F08E
-	.align 2, 0
-_0813F070: .4byte 0x02000000
-_0813F074: .4byte 0x00000888
-_0813F078:
-	movs r0, 0x1
-	negs r0, r0
-	movs r1, 0
-	str r1, [sp]
-	movs r2, 0
-	movs r3, 0x10
-	bl BeginNormalPaletteFade
-	ldr r1, _0813F098 @ =0x02000000
-	ldr r2, _0813F09C @ =0x00000888
-	adds r1, r2
-_0813F08E:
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-	b _0813F0B8
-	.align 2, 0
-_0813F098: .4byte 0x02000000
-_0813F09C: .4byte 0x00000888
-_0813F0A0:
-	ldr r0, _0813F0C0 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _0813F0B8
-	bl sub_80FAB10
-	ldr r0, _0813F0C4 @ =0x02000000
-	ldr r0, [r0]
-	bl SetMainCallback2
-_0813F0B8:
-	add sp, 0x4
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0813F0C0: .4byte gPaletteFade
-_0813F0C4: .4byte 0x02000000
-	thumb_func_end sub_813EFDC
-
-	thumb_func_start sub_813F0C8
-sub_813F0C8: @ 813F0C8
-	push {lr}
-	movs r0, 0x11
-	movs r1, 0x11
-	movs r2, 0x1C
-	movs r3, 0x12
-	bl MenuFillWindowRectWithBlankTile
-	ldr r1, _0813F0F0 @ =0x02000000
-	ldrb r0, [r1, 0x1E]
-	cmp r0, 0
-	beq _0813F0EA
-	adds r0, r1, 0
-	adds r0, 0x8
-	movs r1, 0x11
-	movs r2, 0x11
-	bl MenuPrint
-_0813F0EA:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_0813F0F0: .4byte 0x02000000
-	thumb_func_end sub_813F0C8
-
-	.align 2, 0 @ Don't pad with nop.
diff --git a/ld_script.txt b/ld_script.txt
index 538bdfaba..c0041488c 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -227,7 +227,7 @@ SECTIONS {
         src/player_pc.o(.text);
         asm/player_pc.o(.text);
         src/intro.o(.text);
-        asm/field_region_map.o(.text);
+        src/field_region_map.o(.text);
         asm/battle_anim_813F0F4.o(.text);
         asm/hall_of_fame.o(.text);
         src/credits.o(.text);
diff --git a/src/field_region_map.c b/src/field_region_map.c
new file mode 100644
index 000000000..db12eb6a5
--- /dev/null
+++ b/src/field_region_map.c
@@ -0,0 +1,134 @@
+#include "global.h"
+#include "asm.h"
+#include "main.h"
+#include "menu.h"
+#include "palette.h"
+#include "sprite.h"
+#include "text.h"
+
+extern void sub_80FA8EC(u32, u8);
+extern void sub_80FAB10(void);
+extern u8 sub_80FAB60(void);
+extern void sub_80FBCF0(u32, u8);
+extern void sub_80FBB3C(u16, u16);
+
+struct RegionMapStruct
+{
+    u8 str[0x16];
+    u8 unk16;
+    u8 filler[0x869];
+};
+
+struct UnkStruct
+{
+    MainCallback callback;
+    u8 filler[4];
+    struct RegionMapStruct unk8;
+    u16 unk888;
+};
+
+extern struct UnkStruct unk_2000000;
+
+extern u8 gOtherText_Hoenn[];
+
+void CB2_FieldInitRegionMap(void);
+void CB2_FieldRegionMap(void);
+void VBlankCB_FieldRegionMap(void);
+void sub_813EFDC(void);
+void sub_813F0C8(void);
+
+void FieldInitRegionMap(MainCallback callback)
+{
+    SetVBlankCallback(NULL);
+    unk_2000000.unk888 = 0;
+    unk_2000000.callback = callback;
+    SetMainCallback2(CB2_FieldInitRegionMap);
+}
+
+void CB2_FieldInitRegionMap(void)
+{
+    REG_DISPCNT = 0;
+    REG_BG0HOFS = 0;
+    REG_BG0VOFS = 0;
+    REG_BG1HOFS = 0;
+    REG_BG1VOFS = 0;
+    REG_BG2HOFS = 0;
+    REG_BG2VOFS = 0;
+    REG_BG3HOFS = 0;
+    REG_BG3VOFS = 0;
+    ResetSpriteData();
+    FreeAllSpritePalettes();
+    sub_80FA8EC((u32)&unk_2000000.unk8, 0);
+    sub_80FBCF0(0, 0);
+    sub_80FBB3C(1, 1);
+    SetUpWindowConfig(&gWindowConfig_81E709C);
+    InitMenuWindow(&gWindowConfig_81E709C);
+    MenuZeroFillScreen();
+    REG_BG0CNT = 7936;
+    MenuDrawTextWindow(21, 0, 29, 3);
+    sub_8072BD8(gOtherText_Hoenn, 0x16, 1, 0x38);
+    MenuDrawTextWindow(16, 16, 29, 19);
+    sub_813F0C8();
+    SetMainCallback2(CB2_FieldRegionMap);
+    SetVBlankCallback(VBlankCB_FieldRegionMap);
+    BeginNormalPaletteFade(0xFFFFFFFF, 0, 0x10, 0, 0);
+}
+
+void VBlankCB_FieldRegionMap(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+void CB2_FieldRegionMap(void)
+{
+    sub_813EFDC();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+void sub_813EFDC(void)
+{
+    switch (unk_2000000.unk888)
+    {
+    case 0:
+        REG_DISPCNT = 5441;
+        unk_2000000.unk888++;
+        break;
+    case 1:
+        if (!gPaletteFade.active)
+            unk_2000000.unk888++;
+        break;
+    case 2:
+        switch (sub_80FAB60())
+        {
+        case 3:
+            sub_813F0C8();
+            break;
+        case 4:
+        case 5:
+            unk_2000000.unk888++;
+        }
+        break;
+    case 3:
+        BeginNormalPaletteFade(0xFFFFFFFF, 0, 0, 0x10, 0);
+        unk_2000000.unk888++;
+        break;
+    case 4:
+        if (!gPaletteFade.active)
+        {
+            sub_80FAB10();
+            SetMainCallback2(unk_2000000.callback);
+        }
+        break;
+    }
+}
+
+void sub_813F0C8(void)
+{
+    MenuFillWindowRectWithBlankTile(17, 17, 28, 18);
+    if (unk_2000000.unk8.unk16)
+        MenuPrint(unk_2000000.unk8.str, 17, 17);
+}