Merge pull request #374 from drifloony/fldeff_flash

decompile fldeff_flash

1 files changed, 306 insertions, 0 deletions

diff --git a/src/fldeff_flash.c b/src/fldeff_flash.c
new file mode 100644
index 000000000..6c2633567
--- /dev/null
+++ b/src/fldeff_flash.c
@@ -0,0 +1,306 @@
+#include "global.h"
+#include "event_data.h"
+#include "field_effect.h"
+#include "main.h"
+#include "palette.h"
+#include "pokemon_menu.h"
+#include "rom4.h"
+#include "rom6.h"
+#include "script.h"
+#include "songs.h"
+#include "sound.h"
+#include "sprite.h"
+#include "task.h"
+
+struct FlashStruct
+{
+    u8 unk0;
+    u8 unk1;
+    u8 unk2;
+    u8 unk3;
+    void (*func)(void);
+};
+
+extern struct FlashStruct gUnknown_083F7FC4[];
+extern u16 gCaveTransitionPalette_White[];
+extern u16 gCaveTransitionPalette_Black[];
+extern u16 gUnknown_083F808C[];
+extern u16 gUnknown_083F809C[];
+extern u16 gCaveTransitionTilemap[];
+extern u8 gCaveTransitionTiles[];
+
+extern u8 gLastFieldPokeMenuOpened;
+extern void (*gUnknown_03005CE4)(void);
+
+extern u8 gUnknown_081B694A[];
+
+void sub_810CBFC(void);
+void sub_810CC34(void);
+bool8 sub_810CD5C(void);
+void sub_810CE5C(u8);
+void sub_810CE78(u8);
+void sub_810CF18(u8);
+void sub_810CF5C(u8);
+void sub_810CFC4(u8);
+void sub_810D00C(u8);
+void sub_810D028(u8);
+void sub_810D0C4(u8);
+void sub_810D128(u8);
+
+bool8 SetUpFieldMove_Flash(void)
+{
+    if (gMapHeader.cave == TRUE && !FlagGet(SYS_USE_FLASH))
+    {
+        gFieldCallback = sub_808AB90;
+        gUnknown_03005CE4 = sub_810CBFC;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+void sub_810CBFC(void)
+{
+    u8 taskId = oei_task_add();
+    gUnknown_0202FF84[0] = gLastFieldPokeMenuOpened;
+    gTasks[taskId].data[8] = (uintptr_t)sub_810CC34 >> 16;
+    gTasks[taskId].data[9] = (uintptr_t)sub_810CC34;
+}
+
+void sub_810CC34(void)
+{
+    PlaySE(SE_W115);
+    FlagSet(SYS_USE_FLASH);
+    ScriptContext1_SetupScript(gUnknown_081B694A);
+}
+
+void sub_810CC54(void)
+{
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+static void VBlankCB(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+}
+
+void sub_810CC80(void)
+{
+    u16 ime;
+
+    SetVBlankCallback(NULL);
+    REG_DISPCNT = 0;
+    REG_BG2CNT = 0;
+    REG_BG1CNT = 0;
+    REG_BG0CNT = 0;
+    REG_BG2HOFS = 0;
+    REG_BG2VOFS = 0;
+    REG_BG1HOFS = 0;
+    REG_BG1VOFS = 0;
+    REG_BG0HOFS = 0;
+    REG_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(VBlankCB);
+    SetMainCallback2(sub_810CC54);
+    if (!sub_810CD5C())
+        SetMainCallback2(gMain.savedCallback);
+}
+
+bool8 sub_810CD5C(void)
+{
+    u8 i;
+    u8 v0 = get_map_light_from_warp0();
+    u8 v1 = sav1_map_get_light_level();
+
+    for (i = 0; gUnknown_083F7FC4[i].unk0; i++)
+    {
+        if (gUnknown_083F7FC4[i].unk0 == v0 && gUnknown_083F7FC4[i].unk1 == v1)
+        {
+            gUnknown_083F7FC4[i].func();
+            return TRUE;
+        }
+    }
+
+    return FALSE;
+}
+
+u8 sub_810CDB8(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_083F7FC4[i].unk0; i++)
+    {
+        if (gUnknown_083F7FC4[i].unk0 == v0 && gUnknown_083F7FC4[i].unk1 == v1)
+        {
+            return gUnknown_083F7FC4[i].unk2;
+        }
+    }
+
+    return FALSE;
+}
+
+u8 fade_type_for_given_maplight_pair(u8 a1, u8 a2)
+{
+    u8 i;
+    u8 v0 = a1;
+    u8 v1 = a2;
+
+    for (i = 0; gUnknown_083F7FC4[i].unk0; i++)
+    {
+        if (gUnknown_083F7FC4[i].unk0 == v0 && gUnknown_083F7FC4[i].unk1 == v1)
+        {
+            return gUnknown_083F7FC4[i].unk3;
+        }
+    }
+
+    return FALSE;
+}
+
+void sub_810CE48(void)
+{
+    CreateTask(sub_810CE5C, 0);
+}
+
+void sub_810CE5C(u8 taskId)
+{
+    gTasks[taskId].func = sub_810CE78;
+}
+
+void sub_810CE78(u8 taskId)
+{
+    REG_DISPCNT = 0;
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gUnknown_083F809C, 0xE0, 0x10);
+    REG_BLDCNT = 15937;
+    REG_BLDALPHA = 0;
+    REG_BLDY = 0;
+    REG_BG0CNT = 7948;
+    REG_DISPCNT = 4416;
+    gTasks[taskId].func = sub_810CF18;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+}
+
+void sub_810CF18(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+    REG_BLDALPHA = blend;
+    if (count <= 0x10)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        gTasks[taskId].data[2] = 0;
+        gTasks[taskId].func = sub_810CF5C;
+    }
+}
+
+void sub_810CF5C(u8 taskId)
+{
+    u16 count;
+
+    REG_BLDALPHA = 4112;
+
+    count = gTasks[taskId].data[2];
+
+    if (count < 8)
+    {
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_083F809C[count], 0xE0, 16 - 2 * count);
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_White, 0, 0x20);
+        gTasks[taskId].func = sub_810CFC4;
+        gTasks[taskId].data[2] = 8;
+    }
+}
+
+void sub_810CFC4(u8 taskId)
+{
+    if (gTasks[taskId].data[2])
+        gTasks[taskId].data[2]--;
+    else
+        SetMainCallback2(gMain.savedCallback);
+}
+
+void sub_810CFF8(void)
+{
+    CreateTask(sub_810D00C, 0);
+}
+
+void sub_810D00C(u8 taskId)
+{
+    gTasks[taskId].func = sub_810D028;
+}
+
+void sub_810D028(u8 taskId)
+{
+    REG_DISPCNT = 0;
+    LZ77UnCompVram(gCaveTransitionTiles, (void *)0x600C000);
+    LZ77UnCompVram(gCaveTransitionTilemap, (void *)0x600F800);
+    REG_BLDCNT = 0;
+    REG_BLDALPHA = 0;
+    REG_BLDY = 0;
+    REG_BG0CNT = 7948;
+    REG_DISPCNT = 4416;
+    LoadPalette(gCaveTransitionPalette_White, 0xE0, 0x20);
+    LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+    gTasks[taskId].func = sub_810D0C4;
+    gTasks[taskId].data[0] = 16;
+    gTasks[taskId].data[1] = 0;
+    gTasks[taskId].data[2] = 0;
+}
+
+void sub_810D0C4(u8 taskId)
+{
+    u16 count = gTasks[taskId].data[2];
+    if (count < 16)
+    {
+        gTasks[taskId].data[2]++;
+        gTasks[taskId].data[2]++;
+        LoadPalette(&gUnknown_083F808C[15 - count], 0xE0, 2 * (count + 1));
+    }
+    else
+    {
+        REG_BLDALPHA = 4112;
+        REG_BLDCNT = 15937;
+        gTasks[taskId].func = sub_810D128;
+    }
+}
+
+void sub_810D128(u8 taskId)
+{
+    u16 count = 16 - gTasks[taskId].data[1];
+    u16 blend = count + 0x1000;
+    REG_BLDALPHA = blend;
+    if (count)
+    {
+        gTasks[taskId].data[1]++;
+    }
+    else
+    {
+        LoadPalette(gCaveTransitionPalette_Black, 0, 0x20);
+        SetMainCallback2(gMain.savedCallback);
+    }
+}