Decompile `game.c`

4 files changed, 331 insertions, 3 deletions

diff --git a/src/code/game.c b/src/code/game.c
new file mode 100644
index 000000000..206cd69a4
--- /dev/null
+++ b/src/code/game.c
@@ -0,0 +1,262 @@
+#include <ultra64.h>
+#include <global.h>
+
+s32 gFramerateDivisor = 1;
+f32 gFramerateDivisorF = 1.0f;
+f32 gFramerateDivisorHalf = 1.0f / 2.0f;
+f32 gFramerateDivisorThird = 1.0f / 3.0f;
+
+u32 D_801D1510 = 0x0000000A;
+u32 D_801D1514[3] = { 0 };
+
+void Game_UpdateFramerateVariables(s32 divisor) {
+    gFramerateDivisor = divisor;
+    gFramerateDivisorF = (f32) divisor;
+    gFramerateDivisorHalf = (f32) (divisor * 0.5f);
+    gFramerateDivisorThird = (f32) (divisor / 3.0f);
+}
+
+void Game_SetFramerateDivisor(GameState *gameState, s32 divisor) {
+    R_UPDATE_RATE = (s16) divisor;
+    gameState->framerateDivisor = divisor;
+    Game_UpdateFramerateVariables(divisor);
+}
+
+void GameState_SetFBFilter(Gfx** gfx, u32 arg1) {
+    Gfx* _gfx = *gfx;
+
+    if ((R_FB_FILTER_TYPE > 0) && (R_FB_FILTER_TYPE < 5)) {
+        D_801F8010.type = R_FB_FILTER_TYPE;
+        D_801F8010.color.red = R_FB_FILTER_PRIM_COLOR(0);
+        D_801F8010.color.green = R_FB_FILTER_PRIM_COLOR(1);
+        D_801F8010.color.blue = R_FB_FILTER_PRIM_COLOR(2);
+        D_801F8010.color.alpha = R_FB_FILTER_A;
+        func_80140D10(&D_801F8010, &_gfx, arg1);
+    } else {
+        if ((R_FB_FILTER_TYPE == 5) || (R_FB_FILTER_TYPE == 6)) {
+            D_801F8020.useRgba = (R_FB_FILTER_TYPE == 6);
+            D_801F8020.primColor.red = R_FB_FILTER_PRIM_COLOR(0);
+            D_801F8020.primColor.green = R_FB_FILTER_PRIM_COLOR(1);
+            D_801F8020.primColor.blue = R_FB_FILTER_PRIM_COLOR(2);
+            D_801F8020.primColor.alpha = R_FB_FILTER_A;
+            D_801F8020.envColor.red = R_FB_FILTER_ENV_COLOR(0);
+            D_801F8020.envColor.green = R_FB_FILTER_ENV_COLOR(1);
+            D_801F8020.envColor.blue = R_FB_FILTER_ENV_COLOR(2);
+            D_801F8020.envColor.alpha = R_FB_FILTER_A;
+            func_80142100(&D_801F8020, &_gfx, arg1);
+        } else {
+            if (R_FB_FILTER_TYPE == 7) {
+                sMonoColors.unk_00 = 0;
+                sMonoColors.primColor.red = R_FB_FILTER_PRIM_COLOR(0);
+                sMonoColors.primColor.green = R_FB_FILTER_PRIM_COLOR(1);
+                sMonoColors.primColor.blue = R_FB_FILTER_PRIM_COLOR(2);
+                sMonoColors.primColor.alpha = R_FB_FILTER_A;
+                sMonoColors.envColor.red = R_FB_FILTER_ENV_COLOR(0);
+                sMonoColors.envColor.green = R_FB_FILTER_ENV_COLOR(1);
+                sMonoColors.envColor.blue = R_FB_FILTER_ENV_COLOR(2);
+                sMonoColors.envColor.alpha = R_FB_FILTER_A;
+                VisMono_Draw(&sMonoColors, &_gfx, arg1);
+            }
+        }
+    }
+
+    *gfx = _gfx;
+}
+
+void Game_Nop80173534(GameState *ctxt) {
+    ;
+}
+
+void GameState_Draw(GameState *ctxt, GraphicsContext *gCtxt) {
+    Gfx* nextDisplayList;
+    Gfx* _polyOpa;
+    // Unused vars impact regalloc
+    Gfx* temp_t2;
+    u32 temp_v1;
+
+    _polyOpa = gCtxt->polyOpa.p;
+    nextDisplayList = Graph_GfxPlusOne(gCtxt->polyOpa.p);
+    gSPDisplayList(gCtxt->overlay.p++, nextDisplayList);
+
+    if (R_FB_FILTER_TYPE && R_FB_FILTER_ENV_COLOR(3) == 0) {
+        GameState_SetFBFilter(&nextDisplayList, (u32) gCtxt->zbuffer);
+    }
+    
+    if (R_ENABLE_ARENA_DBG < 0) {
+        R_ENABLE_ARENA_DBG = 0;
+    }
+    
+    gSPEndDisplayList(nextDisplayList++);
+    Graph_BranchDlist(_polyOpa, nextDisplayList);
+    gCtxt->polyOpa.p = nextDisplayList;
+
+lblUnk:; // Label prevents reordering, if(1) around the above block don't seem to help unlike in OoT
+    func_800E9F78(gCtxt);
+
+    if (R_ENABLE_ARENA_DBG != 0) {
+        SpeedMeter_DrawTimeEntries(&D_801F7FF0, gCtxt);
+        SpeedMeter_DrawAllocEntries(&D_801F7FF0, gCtxt, ctxt);
+    }
+}
+
+void Game_ResetSegments(GraphicsContext *gCtxt) {
+    gSPSegment(gCtxt->polyOpa.p++, 0, 0);
+    gSPSegment(gCtxt->polyOpa.p++, 0xF, gCtxt->framebuffer);
+    gSPSegment(gCtxt->polyXlu.p++, 0, 0);
+    gSPSegment(gCtxt->polyXlu.p++, 0xF, gCtxt->framebuffer);
+    gSPSegment(gCtxt->overlay.p++, 0, 0);
+    gSPSegment(gCtxt->overlay.p++, 0xF, gCtxt->framebuffer);
+}
+
+void func_801736DC(GraphicsContext *gCtxt) {
+    Gfx* nextDisplayList;
+    Gfx* _polyOpa;
+    
+    nextDisplayList = Graph_GfxPlusOne(_polyOpa = gCtxt->polyOpa.p);
+    gSPDisplayList(gCtxt->overlay.p++, nextDisplayList);
+    gSPEndDisplayList(nextDisplayList++);
+    Graph_BranchDlist(_polyOpa, nextDisplayList);
+    
+    gCtxt->polyOpa.p = nextDisplayList;
+}
+
+void Game_UpdateInput(GameState *ctxt) {
+    Padmgr_GetInput(ctxt->input, 1);
+}
+
+void Game_Update(GameState *ctxt) {
+    GraphicsContext* _gCtx;
+    _gCtx = ctxt->gfxCtx;
+
+    Game_ResetSegments(ctxt->gfxCtx);
+
+    ctxt->main(ctxt);
+
+    if (R_PAUSE_MENU_MODE != 2) {
+        GameState_Draw(ctxt, _gCtx);
+        func_801736DC(_gCtx);
+    }
+}
+
+void Game_IncrementFrameCount(GameState *ctxt) {
+    Game_Nop80173534(ctxt);
+    ctxt->frames++;
+}
+
+void Game_InitHeap(GameState *ctxt, u32 size) {
+    GameState *_ctx;
+    void *buf;
+
+    _ctx = ctxt;
+    buf = Gamealloc_Alloc(&_ctx->alloc, size);
+
+    if (buf) {
+        GameStateHeap_Init(&ctxt->heap, buf, size);
+        return;
+    }
+
+    GameStateHeap_Init(&ctxt->heap, NULL, 0);
+    assert_fail("../game.c", 0x40B);
+}
+
+void Game_ResizeHeap(GameState *ctxt, u32 size)
+{
+    GameAlloc *alloc;
+    void *buf;
+    u32 systemMaxFree;
+    u32 bytesFree;
+    u32 bytesAllocated;
+    void *heapStart;
+
+    heapStart = ctxt->heap.heapStart;
+    alloc = &ctxt->alloc;
+    GameStateHeap_Clear(&ctxt->heap);
+    Gamealloc_Free(alloc, heapStart);
+    StartHeap_AnalyzeArena(&systemMaxFree, &bytesFree, &bytesAllocated);
+    size = ((systemMaxFree - (sizeof(ArenaNode))) < size) ? (0) : (size);
+    if (!size)
+    {
+        size = systemMaxFree - (sizeof(ArenaNode));
+    }
+
+    if (buf = Gamealloc_Alloc(alloc, size))
+    {
+        GameStateHeap_Init(&ctxt->heap, buf, size);
+    }
+    else
+    {
+        GameStateHeap_Init(&ctxt->heap, 0, 0);
+        assert_fail("../game.c", 0x432);
+    }
+}
+
+void Game_StateInit(GameState *ctxt, GameStateFunc gameStateInit, GraphicsContext *gCtxt) {
+    ctxt->gfxCtx = gCtxt;
+    ctxt->frames = 0U;
+    ctxt->main = NULL;
+    ctxt->destroy = NULL;
+    ctxt->running = 1;
+    gCtxt->unk274 = D_801FBB88;
+    gCtxt->viConfigFeatures = gViConfigFeatures;
+    gCtxt->viConfigXScale = gViConfigXScale;
+    gCtxt->viConfigYScale = gViConfigYScale;
+    ctxt->nextGameStateInit = NULL;
+    ctxt->nextGameStateSize = 0U;
+
+lblUnk:;
+    Gamealloc_Init(&ctxt->alloc);
+    Game_InitHeap(ctxt, 0x100000);
+    Game_SetFramerateDivisor(ctxt, 3);
+    
+    gameStateInit(ctxt);
+
+    func_80140CE0(&D_801F8010);
+    func_801420C0(&D_801F8020);
+    func_801418B0(&sMonoColors);
+    func_80140898(&D_801F8048);
+    func_801773A0(&D_801F7FF0);
+    func_8013ED9C();
+    
+    osSendMesg(&ctxt->gfxCtx->unk5C, NULL, 1);
+}
+
+void Game_StateFini(GameState *ctxt) {
+    func_80172BC0();
+    func_8019E014();
+    osRecvMesg(&ctxt->gfxCtx->unk5C, 0, 1);
+
+    if (ctxt->destroy != 0) {
+        ctxt->destroy(ctxt);
+    }
+
+    func_8013EDD0();
+    func_801773C4(&D_801F7FF0);
+    func_80140D04(&D_801F8010);
+    func_801420F4(&D_801F8020);
+    func_80141900(&sMonoColors);
+    func_80140900(&D_801F8048);
+    GameStateHeap_Clear(&ctxt->heap);
+    Gamealloc_FreeAll(&ctxt->alloc);
+}
+
+GameStateFunc Game_GetNextStateInit(GameState *ctxt) {
+    return ctxt->nextGameStateInit;
+}
+
+u32 Game_GetNextStateSize(GameState *ctxt) {
+    return ctxt->nextGameStateSize;
+}
+
+u32 Game_GetShouldContinue(GameState *ctxt) {
+    return ctxt->running;
+}
+
+s32 Game_GetHeapFreeSize(GameState *ctxt) {
+    return GameStateHeap_GetFreeSize(&ctxt->heap);
+}
+
+s32 func_80173B48(GameState *ctxt) {
+    s32 result;
+    result = OS_CYCLES_TO_NSEC(ctxt->framerateDivisor * sIrqMgrRetraceTime) - OS_CYCLES_TO_NSEC(D_801FBAF0);
+    return result;
+}
diff --git a/src/code/title_setup.c b/src/code/title_setup.c
new file mode 100644
index 000000000..9fae78492
--- /dev/null
+++ b/src/code/title_setup.c
@@ -0,0 +1,66 @@
+#include <ultra64.h>
+#include <global.h>
+
+void TitleSetup_GameStateResetContext(void) {
+    XREG(2) = 0;
+    XREG(10) = 0x1A;
+    XREG(11) = 0x14;
+    XREG(12) = 0xE;
+    XREG(13) = 0;
+    XREG(31) = 0;
+    XREG(41) = 0x50;
+    XREG(43) = 0xFFFFFC54;
+
+    XREG(44) = 0xD7;
+    XREG(45) = 0xDA;
+    XREG(68) = 0x61;
+    XREG(69) = 0x93;
+    XREG(70) = 0x28;
+    XREG(73) = 0x1E;
+    XREG(74) = 0x42;
+    XREG(75) = 0x1E;
+    XREG(76) = 0x1C;
+    XREG(77) = 0x3C;
+    XREG(78) = 0x2F;
+    XREG(79) = 0x62;
+    XREG(87) = 0;
+    XREG(88) = 0x56;
+    XREG(89) = 0x258;
+    XREG(90) = 0x1C2;
+    XREG(91) = 0;
+    XREG(94) = 0;
+    XREG(95) = 0;
+
+    YREG(32) = 0x50;
+    YREG(33) = 0x3C;
+    YREG(34) = 0xDC;
+    YREG(35) = 0x3C;
+    YREG(36) = 0x50;
+    YREG(37) = 0xA0;
+    YREG(38) = 0xDC;
+    YREG(39) = 0xA0;
+    YREG(40) = 0x8E;
+    YREG(41) = 0x6C;
+    YREG(42) = 0xCC;
+    YREG(43) = 0xB1;
+}
+
+void TitleSetup_InitImpl(GameState *gameState) {
+    func_80185908();
+    func_800E9360();
+    TitleSetup_GameStateResetContext();
+
+    gameState->running = 0;
+
+setNextGamestate:; // This label is probably a leftover of a debug ifdef, it's essential to not have gameState->running reordered!
+    SET_NEXT_GAMESTATE(gameState, &Title_Init, TitleContext);
+}
+
+void TitleSetup_Destroy(GameState *gameState) {
+    ;
+}
+
+void TitleSetup_Init(GameState *gameState) {
+    gameState->destroy = &TitleSetup_Destroy;
+    TitleSetup_InitImpl(gameState);
+}
diff --git a/src/code/z_prenmi.c b/src/code/z_prenmi.c
index e2e9721da..bf2dd00a1 100644
--- a/src/code/z_prenmi.c
+++ b/src/code/z_prenmi.c
@@ -43,8 +43,8 @@ void PreNMI_Main(PreNMIContext* prenmiCtx) {
 void PreNMI_Destroy(PreNMIContext* prenmiCtx) {}
 
 void PreNMI_Init(PreNMIContext* prenmiCtx) {
-    prenmiCtx->state.main = (func_ptr)PreNMI_Main;
-    prenmiCtx->state.destroy = (func_ptr)PreNMI_Destroy;
+    prenmiCtx->state.main = (GameStateFunc)PreNMI_Main;
+    prenmiCtx->state.destroy = (GameStateFunc)PreNMI_Destroy;
     prenmiCtx->timer = 30;
     prenmiCtx->unkA8 = 10;
 
diff --git a/src/code/z_rcp.c b/src/code/z_rcp.c
index f56a26eea..ba3e24b29 100644
--- a/src/code/z_rcp.c
+++ b/src/code/z_rcp.c
@@ -1307,7 +1307,7 @@ GLOBAL_ASM("asm/non_matchings/z_rcp/func_8012CF0C.asm")
 #endif
 
 void func_8012D374(GraphicsContext* gCtxt, u8 r, u8 g, u8 b) {
-    if ((gStaticContext->data[0xbe] < 2) && (D_801F6D10 < 2)) {
+    if ((R_PAUSE_MENU_MODE < 2) && (D_801F6D10 < 2)) {
         func_8012CF0C(gCtxt, 1, 1, r, g, b);
     }
     else {