Start decompiling field_region_map

1 files changed, 84 insertions, 0 deletions

diff --git a/src/field_region_map.c b/src/field_region_map.c
new file mode 100644
index 000000000..4923f2069
--- /dev/null
+++ b/src/field_region_map.c
@@ -0,0 +1,84 @@
+
+// Includes
+#include "global.h"
+#include "main.h"
+#include "malloc.h"
+#include "gpu_regs.h"
+#include "bg.h"
+#include "text.h"
+#include "window.h"
+#include "text_window.h"
+#include "palette.h"
+#include "menu.h"
+
+// Static type declarations
+
+// Static RAM declarations
+
+EWRAM_DATA struct {
+    MainCallback callback;
+    u8 filler_004[0x888];
+    u16 unk_88c;
+} *gUnknown_0203BCD0 = NULL;
+
+// Static ROM declarations
+
+static void sub_81701C4(void);
+static void sub_8170260(void);
+static void sub_8170274(void);
+void sub_8170290(void);
+
+// .rodata
+
+extern const struct BgTemplate gUnknown_085E5068[];
+extern const struct WindowTemplate gUnknown_085E5070[];
+
+// .text
+
+void sub_817018C(MainCallback callback)
+{
+    SetVBlankCallback(NULL);
+    gUnknown_0203BCD0 = malloc(sizeof(*gUnknown_0203BCD0));
+    gUnknown_0203BCD0->unk_88c = 0;
+    gUnknown_0203BCD0->callback = callback;
+    SetMainCallback2(sub_81701C4);
+}
+
+static void sub_81701C4(void)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    SetGpuReg(REG_OFFSET_BG0HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG0VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG2HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG2VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG3HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG3VOFS, 0);
+    ResetSpriteData();
+    FreeAllSpritePalettes();
+    ResetBgsAndClearDma3BusyFlags(0);
+    InitBgsFromTemplates(1, gUnknown_085E5068, 2);
+    InitWindows(gUnknown_085E5070);
+    DeactivateAllTextPrinters();
+    sub_809882C(0, 0x27, 0xd0);
+    clear_scheduled_bg_copies_to_vram();
+    SetMainCallback2(sub_8170274);
+    SetVBlankCallback(sub_8170260);
+}
+
+static void sub_8170260(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+static void sub_8170274(void)
+{
+    sub_8170290();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+    do_scheduled_bg_tilemap_copies_to_vram();
+}