title_screen: data and code thru sub_8078C9C

1 files changed, 192 insertions, 0 deletions

diff --git a/src/title_screen.c b/src/title_screen.c
new file mode 100644
index 000000000..9e779bb7b
--- /dev/null
+++ b/src/title_screen.c
@@ -0,0 +1,192 @@
+#include "global.h"
+#include "malloc.h"
+#include "palette.h"
+#include "gpu_regs.h"
+#include "bg.h"
+#include "task.h"
+#include "main.h"
+#include "new_menu_helpers.h"
+#include "m4a.h"
+#include "scanline_effect.h"
+#include "constants/songs.h"
+
+EWRAM_DATA u8 gUnknown_2037F30 = 0;
+
+void sub_8078B34(void);
+void sub_8078B9C(void);
+void sub_8078BB4(void);
+void sub_8078BEC(u8 taskId);
+void sub_8078C24(u8 taskId);
+void sub_8078C90(s16 * data, u8 a1);
+void sub_8078C9C(s16 * data);
+void sub_8078D24(s16 * data);
+void sub_8078DA4(s16 * data);
+void sub_8078FC4(s16 * data);
+void sub_80790CC(s16 * data);
+void sub_80791C0(s16 * data);
+void sub_8079708(void);
+void sub_8079620(void);
+void sub_8079648(void);
+void sub_8079A10(s16 a0);
+
+const u8 gUnknown_83BF58C[] = INCBIN_U8("data/graphics/title_screen/unk_83BF58C.4bpp.lz");
+const u8 gUnknown_83BF5A8[] = INCBIN_U8("data/graphics/title_screen/unk_83BF5A8.bin.lz");
+extern const struct BgTemplate gUnknown_83BFB74[4];
+extern const void (*const gUnknown_83BFB84[])(s16 * data);
+
+/*graphics.h*/
+extern const u16 gUnknown_8EAB6C4[];
+extern const u8 gUnknown_8EAB8C4[];
+extern const u8 gUnknown_8EAD390[];
+extern const u16 gUnknown_8EAD5E8[];
+extern const u8 gUnknown_8EAD608[];
+extern const u8 gUnknown_8EADEE4[];
+extern const u16 gUnknown_8EAE094[];
+extern const u8 gUnknown_8EAE0B4[];
+extern const u8 gUnknown_8EAE374[];
+
+void CB2_InitTitleScreen(void)
+{
+    switch (gMain.state)
+    {
+    default:
+        gMain.state = 0;
+        // fallthrough
+    case 0:
+        SetVBlankCallback(NULL);
+        StartTimer1();
+        InitHeap(gHeap, HEAP_SIZE);
+        ResetTasks();
+        ResetSpriteData();
+        FreeAllSpritePalettes();
+        ResetPaletteFade();
+        sub_8078B34();
+        DmaFill16(3, 0, (void *)VRAM, VRAM_SIZE);
+        DmaFill32(3, 0, (void *)OAM, OAM_SIZE);
+        DmaFill16(3, 0, (void *)PLTT, PLTT_SIZE);
+        ResetBgsAndClearDma3BusyFlags(FALSE);
+        InitBgsFromTemplates(0, gUnknown_83BFB74, NELEMS(gUnknown_83BFB74));
+        SetGpuRegBits(REG_OFFSET_DISPCNT, DISPCNT_OBJ_1D_MAP | DISPCNT_OBJ_ON);
+        gUnknown_2037F30 = 0xFF;
+        break;
+    case 1:
+        LoadPalette(gUnknown_8EAB6C4, 0, 0x1A0);
+        DecompressAndCopyTileDataToVram(0, gUnknown_8EAB8C4, 0, 0, 0);
+        DecompressAndCopyTileDataToVram(0, gUnknown_8EAD390, 0, 0, 1);
+        LoadPalette(gUnknown_8EAD5E8, 0xD0, 0x20);
+        DecompressAndCopyTileDataToVram(1, gUnknown_8EAD608, 0, 0, 0);
+        DecompressAndCopyTileDataToVram(1, gUnknown_8EADEE4, 0, 0, 1);
+        LoadPalette(gUnknown_8EAE094, 0xF0, 0x20);
+        DecompressAndCopyTileDataToVram(2, gUnknown_8EAE0B4, 0, 0, 0);
+        DecompressAndCopyTileDataToVram(2, gUnknown_8EAE374, 0, 0, 1);
+        LoadPalette(gUnknown_8EAE094, 0xE0, 0x20);
+        DecompressAndCopyTileDataToVram(3, gUnknown_83BF58C, 0, 0, 0);
+        DecompressAndCopyTileDataToVram(3, gUnknown_83BF5A8, 0, 0, 1);
+        sub_8079708();
+        break;
+    case 2:
+        if (!FreeTempTileDataBuffersIfPossible())
+        {
+            BlendPalettes(0x0000FFFF, 0x10, RGB_BLACK);
+            CreateTask(sub_8078C24, 4);
+            gUnknown_2037F30 = CreateTask(sub_8078BEC, 2);
+            SetVBlankCallback(sub_8078BB4);
+            SetMainCallback2(sub_8078B9C);
+            m4aSongNumStart(BGM_FRLG_TITLE);
+        }
+        return;
+    }
+    gMain.state++;
+}
+
+void sub_8078B34(void)
+{
+    SetGpuReg(REG_OFFSET_DISPCNT,  0);
+    SetGpuReg(REG_OFFSET_BLDCNT,   0);
+    SetGpuReg(REG_OFFSET_BLDALPHA, 0);
+    SetGpuReg(REG_OFFSET_BLDY,     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);
+}
+
+void sub_8078B9C(void)
+{
+    RunTasks();
+    AnimateSprites();
+    BuildOamBuffer();
+    UpdatePaletteFade();
+}
+
+void sub_8078BB4(void)
+{
+    LoadOam();
+    ProcessSpriteCopyRequests();
+    TransferPlttBuffer();
+    ScanlineEffect_InitHBlankDmaTransfer();
+
+    if (gUnknown_2037F30 != 0xFF)
+        gTasks[gUnknown_2037F30].data[0]++;
+}
+
+void sub_8078BEC(u8 taskId)
+{
+    s16 * data = gTasks[taskId].data;
+
+    if (data[0] >= 2700)
+    {
+        gUnknown_2037F30 = 0xFF;
+        DestroyTask(taskId);
+    }
+}
+
+void sub_8078C24(u8 taskId)
+{
+    s16 * data = gTasks[taskId].data;
+
+    if (JOY_NEW(A_BUTTON | B_BUTTON | START_BUTTON)
+    && data[0] != 3 && data[0] != 4 && data[0] != 5)
+    {
+        sub_8079620();
+        sub_8079648();
+        sub_8079A10(data[5]);
+        sub_8078C90(data, 3);
+    }
+    else
+    {
+        gUnknown_83BFB84[data[0]](data);
+    }
+}
+
+void sub_8078C90(s16 * data, u8 a1)
+{
+    data[1] = 0;
+    data[0] = a1;
+}
+
+void sub_8078C9C(s16 * data)
+{
+    struct ScanlineEffectParams params;
+
+    HideBg(0);
+    ShowBg(1);
+    ShowBg(2);
+    ShowBg(3);
+
+    params.dmaDest = (volatile void *)REG_ADDR_BLDY;
+    params.dmaControl = SCANLINE_EFFECT_DMACNT_16BIT;
+    params.initState = 1;
+    params.unused9 = 0;
+
+    CpuFill16(0, gScanlineEffectRegBuffers[0], 0x140);
+    CpuFill16(0, gScanlineEffectRegBuffers[1], 0x140);
+
+    ScanlineEffect_SetParams(params);
+
+    sub_8078C90(data, 1);
+}