Decompile fldeff_flash

1 files changed, 355 insertions, 0 deletions

diff --git a/src/fldeff_flash.c b/src/fldeff_flash.c
new file mode 100644
index 000000000..6a3a1a963
--- /dev/null
+++ b/src/fldeff_flash.c
@@ -0,0 +1,355 @@
+#include "global.h"
+#include "constants/songs.h"
+#include "event_data.h"
+#include "event_scripts.h"
+#include "field_effect.h"
+#include "gpu_regs.h"
+#include "gba/io_reg.h"
+#include "main.h"
+#include "palette.h"
+#include "party_menu.h"
+#include "overworld.h"
+#include "rom6.h"
+#include "script.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+
+// structures
+struct FlashStruct
+{
+    u8 unk0;
+    u8 unk1;
+    bool8 unk2;
+    bool8 unk3;
+    void (*func)(void);
+};
+
+// extern data
+extern u8 EventScript_2926F8[];
+
+// extern functions
+extern bool8 ShouldDoBrailleFlyEffect(void);
+extern void sub_8179918(void);
+
+// static functions
+void hm2_flash(void);
+void sub_81371B4(void);
+bool8 sub_8137304(void);
+void sub_8137404(u8 taskId);
+void sub_8137420(u8 taskId);
+void sub_81374C4(u8 taskId);
+void sub_813750C(u8 taskId);
+void sub_8137574(u8 taskId);
+void sub_81375BC(u8 taskId);
+void sub_81375D8(u8 taskId);
+void sub_8137678(u8 taskId);
+void sub_81376DC(u8 taskId);
+
+// rodata
+extern struct FlashStruct gUnknown_085B27C8[];
+
+/*static const*/ extern u16 gCaveTransitionPalette_White[];// = {0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF, 0x7FFF};
+/*static const*/ extern u16 gCaveTransitionPalette_Black[];// = {0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000};
+
+/*static const*/ extern u16 gUnknown_085B2890[];// = INCBIN_U16("graphics/misc/83F808C.gbapal");
+/*static const*/ extern u16 gUnknown_085B28A0[];// = INCBIN_U16("graphics/misc/83F809C.gbapal");
+/*static const*/ extern u16 gCaveTransitionTilemap[];// = INCBIN_U16("graphics/misc/cave_transition_map.bin.lz");
+/*static const*/ extern u8 gCaveTransitionTiles[];// = INCBIN_U8("graphics/misc/cave_transition.4bpp.lz");
+
+// ewram
+
+// text
+
+bool8 SetUpFieldMove_Flash(void)
+{
+    if(ShouldDoBrailleFlyEffect())
+    {
+        gSpecialVar_Result = GetCursorSelectionMonId();
+        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gUnknown_0203CEEC = sub_8179918;
+        return TRUE;
+    }
+    else if (gMapHeader.cave == TRUE && !FlagGet(FLAG_SYS_USE_FLASH))
+    {
+        gUnknown_03005DB0 = FieldCallback_Teleport;
+        gUnknown_0203CEEC = hm2_flash;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+void hm2_flash(void)
+{
+    u8 taskId = oei_task_add();
+    gFieldEffectArguments[0] = GetCursorSelectionMonId();
+    gTasks[taskId].data[8] = (uintptr_t)sub_81371B4 >> 16;
+    gTasks[taskId].data[9] = (uintptr_t)sub_81371B4;
+}
+
+void sub_81371B4(void)
+{
+    PlaySE(SE_W115);
+    FlagSet(FLAG_SYS_USE_FLASH);
+    ScriptContext1_SetupScript(EventScript_2926F8);
+}
+
+void sub_81371D4(void)
+{
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+void sub_81371EC(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+void c2_change_map(void)
+{
+    u16 ime;
+
+    SetVBlankCallback(NULL);
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    SetGpuReg(REG_OFFSET_BG2CNT, 0);
+    SetGpuReg(REG_OFFSET_BG1CNT, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, 0);
+    SetGpuReg(REG_OFFSET_BG2HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG2VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG1VOFS, 0);
+    SetGpuReg(REG_OFFSET_BG0HOFS, 0);
+    SetGpuReg(REG_OFFSET_BG0VOFS, 0);
+    DmaFill16(3, 0, (void *)VRAM, VRAM_SIZE);
+    DmaFill32(3, 0, (void *)OAM, OAM_SIZE);
+    DmaFill16(3, 0, (void *)(PLTT + 2), PLTT_SIZE - 2);
+    ResetPaletteFade();
+    ResetTasks();
+    ResetSpriteData();
+    ime = REG_IME;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_VBLANK;
+    REG_IME = ime;
+    SetVBlankCallback(sub_81371EC);
+    SetMainCallback2(sub_81371D4);
+    if (!sub_8137304())
+        SetMainCallback2(gMain.savedCallback);
+}
+
+bool8 sub_8137304(void)
+{
+    u8 i;
+    u8 v0 = get_map_light_from_warp0();
+    u8 v1 = Overworld_GetMapTypeOfSaveblockLocation();
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            gUnknown_085B27C8[i].func();
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+bool8 sub_8137360(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            return gUnknown_085B27C8[i].unk2;
+        }
+    }
+
+    return FALSE;
+}
+
+bool8 fade_type_for_given_maplight_pair(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_085B27C8[i].unk0; i++)
+    {
+        if (gUnknown_085B27C8[i].unk0 == v0 && gUnknown_085B27C8[i].unk1 == v1)
+        {
+            return gUnknown_085B27C8[i].unk3;
+        }
+    }
+
+    return FALSE;
+}
+
+void sub_81373F0(void)
+{
+    CreateTask(sub_8137404, 0);
+}
+
+void sub_8137404(u8 taskId)
+{
+    gTasks[taskId].func = sub_8137420;
+}
+
+void sub_8137420(u8 taskId)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gUnknown_085B28A0, 0xE0, 0x10);
+    SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG0
+                                | BLDCNT_EFFECT_BLEND
+                                | BLDCNT_TGT2_BG1
+                                | BLDCNT_TGT2_BG2
+                                | BLDCNT_TGT2_BG3
+                                | BLDCNT_TGT2_OBJ
+                                | BLDCNT_TGT2_BD);
+    SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+    SetGpuReg(REG_OFFSET_BLDY, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, BGCNT_PRIORITY(0)
+                               | BGCNT_CHARBASE(3)
+                               | BGCNT_SCREENBASE(31)
+                               | BGCNT_16COLOR
+                               | BGCNT_TXT256x256);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0
+                                | DISPCNT_OBJ_1D_MAP
+                                | DISPCNT_BG0_ON
+                                | DISPCNT_OBJ_ON);
+    gTasks[taskId].func = sub_81374C4;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+}
+
+void sub_81374C4(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, blend);
+    if (count <= 0x10)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        gTasks[taskId].data[2] = 0;
+        gTasks[taskId].func = sub_813750C;
+    }
+}
+
+void sub_813750C(u8 taskId)
+{
+    u16 count;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, 4112);
+    count = gTasks[taskId].data[2];
+
+    if (count < 8)
+    {
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_085B28A0[count], 0xE0, 16 - 2 * count);
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_White, 0, 0x20);
+        gTasks[taskId].func = sub_8137574;
+        gTasks[taskId].data[2] = 8;
+    }
+}
+
+void sub_8137574(u8 taskId)
+{
+    if (gTasks[taskId].data[2])
+        gTasks[taskId].data[2]--;
+    else
+        SetMainCallback2(gMain.savedCallback);
+}
+
+void sub_81375A8(void)
+{
+    CreateTask(sub_81375BC, 0);
+}
+
+void sub_81375BC(u8 taskId)
+{
+    gTasks[taskId].func = sub_81375D8;
+}
+
+void sub_81375D8(u8 taskId)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT, 0);
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    SetGpuReg(REG_OFFSET_BLDCNT, 0);
+    SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+    SetGpuReg(REG_OFFSET_BLDY, 0);
+    SetGpuReg(REG_OFFSET_BG0CNT, BGCNT_PRIORITY(0)
+                               | BGCNT_CHARBASE(3)
+                               | BGCNT_SCREENBASE(31)
+                               | BGCNT_16COLOR
+                               | BGCNT_TXT256x256);
+    SetGpuReg(REG_OFFSET_DISPCNT, DISPCNT_MODE_0
+                                | DISPCNT_OBJ_1D_MAP
+                                | DISPCNT_BG0_ON
+                                | DISPCNT_OBJ_ON);
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+    gTasks[taskId].func = sub_8137678;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+    gTasks[taskId].data[2] = 0;
+}
+
+void sub_8137678(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[2];
+
+    if (count < 16)
+    {
+        gTasks[taskId].data[2]++;
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_085B2890[15 - count], 0xE0, 2 * (count + 1));
+    }
+    else
+    {
+        SetGpuReg(REG_OFFSET_BLDALPHA, BLDALPHA_BLEND(16, 16));
+        SetGpuReg(REG_OFFSET_BLDCNT, BLDCNT_TGT1_BG0
+                                    | BLDCNT_EFFECT_BLEND
+                                    | BLDCNT_TGT2_BG1
+                                    | BLDCNT_TGT2_BG2
+                                    | BLDCNT_TGT2_BG3
+                                    | BLDCNT_TGT2_OBJ
+                                    | BLDCNT_TGT2_BD);
+        gTasks[taskId].func = sub_81376DC;
+    }
+}
+
+void sub_81376DC(u8 taskId)
+{
+    u16 count = 16 - gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+
+    SetGpuReg(REG_OFFSET_BLDALPHA, blend);
+    if (count)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+        SetMainCallback2(gMain.savedCallback);
+    }
+}