decompile field_region_map

1 files changed, 134 insertions, 0 deletions

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);
+}