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path: root/src/credits.c
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#include "global.h"
#include "m4a.h"
#include "main.h"
#include "menu.h"
#include "palette.h"
#include "songs.h"
#include "sprite.h"
#include "task.h"
#include "text.h"

struct Unk201C000 {
    u8 pad_00[0x88];
    u16 var_88;
    u16 var_8A;
    u16 var_8C;
};

struct HallOfFame {
    u8 sheet0[0x800];
    u8 sheet1[0x800];
    u8 sheet2[0x800];
};

extern struct Unk201C000 unk_201C000;

extern struct HallOfFame gHallOfFame;
extern u8 unk_201e800[0x800];
extern u8 unk_201f000[0x800];
extern u16 unk_201f800[];

extern s16 gUnknown_02039320;
extern u16 gUnknown_02039322;
extern u8 gUnknown_02039324;
extern u8 gUnknown_02039325;
extern u16 gUnknown_0203935C;

extern u8 gReservedSpritePaletteCount;

// data/starter_choose
extern u16 gBirchBagGrassPal[32];
extern u8 gBirchBagTilemap[];
extern u8 gBirchHelpGfx[];

//  data/credits
extern u16 gUnknown_0840B7BC[32];
extern u16 gUnknown_0840B7FC[32];
extern struct SpriteSheet gUnknown_0840CAA0;
extern struct SpritePalette gUnknown_0840CAB0;

void sub_8143B38(u8 taskId);
void sub_8143B68(u8 taskId);
static void sub_8143BFC(u8 taskId);
static void c2_080C9BFC(u8 taskId);
static void sub_8143CC0(u8 taskId);
static void sub_8143D04(u8 taskId);
static void sub_8143EBC(u8 taskId);
static void sub_8143F04(u8 taskId);
static void sub_8143F3C(u8 taskId);

void sub_8143FDC(u8 taskId);
void sub_8144130(void);
void sub_81441B8(u8 taskId);
void sub_8144514(u8 taskId);
u8 sub_8144ECC(u8 data, u8 taskId);
void sub_81450AC(u8 taskId);
void sub_8145128(u16, u16, u16);
void sub_81458DC(void);

static void sub_8143948(void) {
    LoadOam();
    ProcessSpriteCopyRequests();
    TransferPlttBuffer();
}

static void sub_814395C(void) {
    RunTasks();
    AnimateSprites();
    BuildOamBuffer();
    UpdatePaletteFade();

    if (!(gMain.heldKeys & B_BUTTON)) {
        return;
    }

    if (!gUnknown_02039324) {
        return;
    }

    if (gTasks[gUnknown_02039322].func != sub_8143B68) {
        return;
    }

    sub_8143948();
    RunTasks();
    AnimateSprites();
    BuildOamBuffer();
    UpdatePaletteFade();
    gUnknown_02039325 = 1;
}

void sub_81439D0(void) {
    u8 taskId;
    s16 taskId3;
    u8 taskId2;
    u16 savedIme;
    struct Unk201C000 * c000;

    sub_8144130();
    SetVBlankCallback(NULL);
    ResetPaletteFade();
    ResetTasks();

    taskId = CreateTask(sub_8143B38, 0);

    gTasks[taskId].data[4] = 0;
    gTasks[taskId].data[7] = 0;
    gTasks[taskId].data[11] = 0;
    gTasks[taskId].data[13] = 1;

    while (TRUE) {
        if (sub_8144ECC(0, taskId)) {
            break;
        }
    }

    taskId3 = gTasks[taskId].data[1];
    gTasks[taskId3].data[0] = 40;

    SetUpWindowConfig(&gWindowConfig_81E7208);
    InitMenuWindow(&gWindowConfig_81E7208);
    LoadPalette(&gUnknown_0840B7BC, 0x80, sizeof(gUnknown_0840B7BC));

    CpuCopy16(&gUnknown_0840B7FC, (void *) (VRAM + 0xBEE0), sizeof(gUnknown_0840B7FC));

    REG_BG0VOFS = 0xFFFC;

    taskId2 = CreateTask(sub_81441B8, 0);

    gTasks[taskId2].data[1] = taskId;
    gTasks[taskId].data[15] = taskId2;

    BeginNormalPaletteFade(-1, 0, 16, 0, 0);


    savedIme = REG_IME;
    REG_IME = 0;
    REG_IE |= INTR_FLAG_VBLANK;
    REG_IME = savedIme;
    REG_DISPSTAT |= DISPSTAT_VBLANK_INTR;


    SetVBlankCallback(sub_8143948);
    m4aSongNumStart(BGM_THANKFOR);
    SetMainCallback2(sub_814395C);
    gUnknown_02039325 = 0;

    c000 = &unk_201C000;

    sub_81458DC();

    c000->var_88 = 0;
    c000->var_8A = 0;
    c000->var_8C = 0;

    gUnknown_02039322 = taskId;
}

void sub_8143B38(u8 taskId) {
    if (gPaletteFade.active) {
        return;
    }

    gTasks[taskId].func = sub_8143B68;
}

void sub_8143B68(u8 taskId) {
    u16 data11;

    if (gTasks[taskId].data[4]) {
        s16 secondaryTaskId;

        secondaryTaskId = gTasks[taskId].data[1];
        gTasks[secondaryTaskId].data[0] = 30;

        gTasks[taskId].data[12] = 0x100;
        gTasks[taskId].func = sub_8143EBC;
        return;
    }

    gUnknown_02039320 = 0;
    data11 = gTasks[taskId].data[11];

    if (gTasks[taskId].data[11] == 1) {
        gTasks[taskId].data[13] = data11;
        gTasks[taskId].data[11] = 0;
        BeginNormalPaletteFade(-1, 0, 0, 16, 0);
        gTasks[taskId].func = sub_8143BFC;
    } else if (gTasks[taskId].data[11] == 2) {
        gTasks[taskId].data[13] = data11;
        gTasks[taskId].data[11] = 0;
        BeginNormalPaletteFade(-1, 0, 0, 16, 0);
        gTasks[taskId].func = sub_8143CC0;
    }
}

static void sub_8143BFC(u8 taskId) {
    if (gPaletteFade.active) {
        return;
    }

    REG_DISPCNT = 0;
    sub_81450AC(taskId);
    gTasks[taskId].func = c2_080C9BFC;
}

static void c2_080C9BFC(u8 taskId) {
    u16 backup;

    SetVBlankCallback(NULL);

    if (!sub_8144ECC(gTasks[taskId].data[7], taskId)) {
        return;
    }

    BeginNormalPaletteFade(-1, 0, 16, 0, 0);

    backup = REG_IME;
    REG_IME = 0;
    REG_IE |= INTR_FLAG_VBLANK;
    REG_IME = backup;
    REG_DISPSTAT |= DISPSTAT_VBLANK_INTR;

    SetVBlankCallback(sub_8143948);
    gTasks[taskId].func = sub_8143B38;
}

static void sub_8143CC0(u8 taskId) {
    if (gPaletteFade.active) {
        return;
    }

    REG_DISPCNT = 0;
    sub_81450AC(taskId);
    gTasks[taskId].func = sub_8143D04;
}

#ifdef NONMATCHING
static void sub_8143D04(u8 taskId) {
    switch (gMain.state) {
        default:
        case 0: {
            u16 i;

            ResetSpriteData();
            FreeAllSpritePalettes();
            gReservedSpritePaletteCount = 8;
            LZ77UnCompVram(&gBirchHelpGfx, (void *) VRAM);
            LZ77UnCompVram(&gBirchBagTilemap, (void *) (VRAM + 0x3800));
            LoadPalette(gBirchBagGrassPal + 2, 1, 31 * 2);

            for (i = 0; i < 0x800; i++) {
                gHallOfFame.sheet0[i] = 0x11;
            }

            for (i = 0; i < 0x800; i++) {
                gHallOfFame.sheet1[i] = 0x22;
            }

            for (i = 0; i < 0x800; i++) {
                gHallOfFame.sheet2[i] = 0x33;
            }

            unk_201f800[0] = 0;
            unk_201f800[1] = 0x53FF;
            unk_201f800[2] = 0x529F;
            unk_201f800[3] = 0x7E94;

            LoadSpriteSheet(&gUnknown_0840CAA0);
            LoadSpritePalette(&gUnknown_0840CAB0);

            gMain.state += 1;
            break;
        }

        case 1: {
            gTasks[taskId].data[3] = CreateTask(sub_8144514, 0);
            gTasks[gTasks[taskId].data[3]].data[0] = 1;
            gTasks[gTasks[taskId].data[3]].data[1] = taskId;
            gTasks[gTasks[taskId].data[3]].data[2] = gTasks[taskId].data[7];

            BeginNormalPaletteFade(-1, 0, 16, 0, 0);
            REG_BG3HOFS = 0;
            REG_BG3VOFS = 32;
            REG_BG3CNT = 0x703;
            REG_DISPCNT = 0x1940;

            gMain.state = 0;
            gUnknown_0203935C = 0;
            gTasks[taskId].func = sub_8143B38;
            break;
        }
    }
}
#else
__attribute__((naked))
static void sub_8143D04(u8 taskId) {
    asm(".syntax unified\n\
	push {r4-r7,lr}\n\
	mov r7, r9\n\
	mov r6, r8\n\
	push {r6,r7}\n\
	sub sp, 0x4\n\
	lsls r0, 24\n\
	lsrs r6, r0, 24\n\
	ldr r0, _08143DC8 @ =gMain\n\
	ldr r1, _08143DCC @ =0x0000043c\n\
	adds r1, r0\n\
	mov r8, r1\n\
	ldrb r7, [r1]\n\
	cmp r7, 0\n\
	beq _08143D24\n\
	cmp r7, 0x1\n\
	beq _08143E0C\n\
_08143D24:\n\
	bl ResetSpriteData\n\
	bl FreeAllSpritePalettes\n\
	ldr r1, _08143DD0 @ =gReservedSpritePaletteCount\n\
	movs r0, 0x8\n\
	strb r0, [r1]\n\
	ldr r0, _08143DD4 @ =gBirchHelpGfx\n\
	movs r1, 0xC0\n\
	lsls r1, 19\n\
	bl LZ77UnCompVram\n\
	ldr r0, _08143DD8 @ =gBirchGrassTilemap\n\
	ldr r1, _08143DDC @ =0x06003800\n\
	bl LZ77UnCompVram\n\
	ldr r0, _08143DE0 @ =0x0840281a\n\
	movs r1, 0x1\n\
	movs r2, 0x3E\n\
	bl LoadPalette\n\
	movs r1, 0\n\
	ldr r4, _08143DE4 @ =0x0201e000\n\
	movs r3, 0x11\n\
	ldr r2, _08143DE8 @ =0x000007ff\n\
_08143D56:\n\
	adds r0, r1, r4\n\
	strb r3, [r0]\n\
	adds r0, r1, 0x1\n\
	lsls r0, 16\n\
	lsrs r1, r0, 16\n\
	cmp r1, r2\n\
	bls _08143D56\n\
	movs r1, 0\n\
	ldr r2, _08143DEC @ =0x0201f800\n\
	ldr r6, _08143DF0 @ =gUnknown_0840CAA0\n\
	ldr r0, _08143DF4 @ =0xfffff000\n\
	adds r5, r2, r0\n\
	movs r4, 0x22\n\
	ldr r3, _08143DE8 @ =0x000007ff\n\
_08143D72:\n\
	adds r0, r1, r5\n\
	strb r4, [r0]\n\
	adds r0, r1, 0x1\n\
	lsls r0, 16\n\
	lsrs r1, r0, 16\n\
	cmp r1, r3\n\
	bls _08143D72\n\
	movs r1, 0\n\
	ldr r5, _08143DF8 @ =0x0201f000\n\
	movs r4, 0x33\n\
	ldr r3, _08143DE8 @ =0x000007ff\n\
_08143D88:\n\
	adds r0, r1, r5\n\
	strb r4, [r0]\n\
	adds r0, r1, 0x1\n\
	lsls r0, 16\n\
	lsrs r1, r0, 16\n\
	cmp r1, r3\n\
	bls _08143D88\n\
	movs r0, 0\n\
	strh r0, [r2]\n\
	ldr r1, _08143DFC @ =0x000053ff\n\
	adds r0, r1, 0\n\
	strh r0, [r2, 0x2]\n\
	ldr r1, _08143E00 @ =0x0000529f\n\
	adds r0, r1, 0\n\
	strh r0, [r2, 0x4]\n\
	ldr r1, _08143E04 @ =0x00007e94\n\
	adds r0, r1, 0\n\
	strh r0, [r2, 0x6]\n\
	adds r0, r6, 0\n\
	bl LoadSpriteSheet\n\
	ldr r0, _08143E08 @ =gUnknown_0840CAB0\n\
	bl LoadSpritePalette\n\
	ldr r1, _08143DC8 @ =gMain\n\
	ldr r2, _08143DCC @ =0x0000043c\n\
	adds r1, r2\n\
	ldrb r0, [r1]\n\
	adds r0, 0x1\n\
	strb r0, [r1]\n\
	b _08143E90\n\
	.align 2, 0\n\
_08143DC8: .4byte gMain\n\
_08143DCC: .4byte 0x0000043c\n\
_08143DD0: .4byte gReservedSpritePaletteCount\n\
_08143DD4: .4byte gBirchHelpGfx\n\
_08143DD8: .4byte gBirchGrassTilemap\n\
_08143DDC: .4byte 0x06003800\n\
_08143DE0: .4byte gBirchBagGrassPal + 2\n\
_08143DE4: .4byte 0x0201e000\n\
_08143DE8: .4byte 0x000007ff\n\
_08143DEC: .4byte 0x0201f800\n\
_08143DF0: .4byte gUnknown_0840CAA0\n\
_08143DF4: .4byte 0xfffff000\n\
_08143DF8: .4byte 0x0201f000\n\
_08143DFC: .4byte 0x000053ff\n\
_08143E00: .4byte 0x0000529f\n\
_08143E04: .4byte 0x00007e94\n\
_08143E08: .4byte gUnknown_0840CAB0\n\
_08143E0C:\n\
	ldr r0, _08143EA0 @ =sub_8144514\n\
	movs r1, 0\n\
	bl CreateTask\n\
	ldr r2, _08143EA4 @ =gTasks\n\
	lsls r4, r6, 2\n\
	adds r4, r6\n\
	lsls r4, 3\n\
	adds r4, r2\n\
	lsls r0, 24\n\
	lsrs r0, 24\n\
	movs r1, 0\n\
	mov r9, r1\n\
	movs r5, 0\n\
	strh r0, [r4, 0xE]\n\
	movs r0, 0xE\n\
	ldrsh r1, [r4, r0]\n\
	lsls r0, r1, 2\n\
	adds r0, r1\n\
	lsls r0, 3\n\
	adds r0, r2\n\
	strh r7, [r0, 0x8]\n\
	movs r0, 0xE\n\
	ldrsh r1, [r4, r0]\n\
	lsls r0, r1, 2\n\
	adds r0, r1\n\
	lsls r0, 3\n\
	adds r0, r2\n\
	strh r6, [r0, 0xA]\n\
	movs r0, 0xE\n\
	ldrsh r1, [r4, r0]\n\
	lsls r0, r1, 2\n\
	adds r0, r1\n\
	lsls r0, 3\n\
	adds r0, r2\n\
	ldrh r1, [r4, 0x16]\n\
	strh r1, [r0, 0xC]\n\
	movs r0, 0x1\n\
	negs r0, r0\n\
	str r5, [sp]\n\
	movs r1, 0\n\
	movs r2, 0x10\n\
	movs r3, 0\n\
	bl BeginNormalPaletteFade\n\
	ldr r0, _08143EA8 @ =REG_BG3HOFS\n\
	strh r5, [r0]\n\
	ldr r1, _08143EAC @ =REG_BG3VOFS\n\
	movs r0, 0x20\n\
	strh r0, [r1]\n\
	subs r1, 0x10\n\
	ldr r2, _08143EB0 @ =0x00000703\n\
	adds r0, r2, 0\n\
	strh r0, [r1]\n\
	subs r1, 0xE\n\
	movs r2, 0xCA\n\
	lsls r2, 5\n\
	adds r0, r2, 0\n\
	strh r0, [r1]\n\
	mov r1, r9\n\
	mov r0, r8\n\
	strb r1, [r0]\n\
	ldr r0, _08143EB4 @ =gUnknown_0203935C\n\
	strh r5, [r0]\n\
	ldr r0, _08143EB8 @ =sub_8143B38\n\
	str r0, [r4]\n\
_08143E90:\n\
	add sp, 0x4\n\
	pop {r3,r4}\n\
	mov r8, r3\n\
	mov r9, r4\n\
	pop {r4-r7}\n\
	pop {r0}\n\
	bx r0\n\
	.align 2, 0\n\
_08143EA0: .4byte sub_8144514\n\
_08143EA4: .4byte gTasks\n\
_08143EA8: .4byte 0x4000000 + 0x1c\n\
_08143EAC: .4byte 0x4000000 + 0x1e\n\
_08143EB0: .4byte 0x00000703\n\
_08143EB4: .4byte gUnknown_0203935C\n\
_08143EB8: .4byte sub_8143B38\n\
    .syntax divided\n");
}
#endif

static void sub_8143EBC(u8 taskId) {
    if (gTasks[taskId].data[12]) {
        gTasks[taskId].data[12] -= 1;
        return;
    }

    BeginNormalPaletteFade(-1, 12, 0, 16, 0);
    gTasks[taskId].func = sub_8143F04;
}

static void sub_8143F04(u8 taskId) {
    if (gPaletteFade.active) {
        return;
    }

    sub_81450AC(taskId);
    gTasks[taskId].func = sub_8143F3C;
}

static void sub_8143F3C(u8 taskId) {
    u16 backup;

    sub_8144130();
    ResetPaletteFade();
    sub_8145128(0, 0x3800, 0);
    ResetSpriteData();
    FreeAllSpritePalettes();
    BeginNormalPaletteFade(-1, 8, 16, 0, 0);

    REG_BG0CNT = 0x700;
    backup = REG_IME;
    REG_IME = 0;
    REG_IE |= INTR_FLAG_VBLANK;
    REG_IME = backup;
    REG_DISPSTAT |= DISPSTAT_VBLANK_INTR;
    REG_DISPCNT = 0x140;

    gTasks[taskId].data[0] = 0x100;
    gTasks[taskId].func = sub_8143FDC;
}