Decompile Title overlay (#20)

* Decompile Title overlay

* math structs as cpp when applicable

* fixes and improvements

* regressions fix 1

* regressions fix 2

src/025_Title/TitleScreenManager.cpp

@@ -0,0 +1,63 @@
+#include "TitleScreen/TitleScreen.hpp"
+#include "regs.h"
+
+const unk16 data_ov025_020c5a0c[] = {0x0016, 0x003C};
+
+extern "C" {
+void GX_SetGraphicsMode(unk32 param1, unk32 param2, unk32 param3);
+void GXS_SetGraphicsMode(unk32 param1);
+}
+
+ARM TitleScreenManager *TitleScreenManager::Create(unk32 param1) {
+    return new(HeapIndex_1) TitleScreenManager(param1);
+}
+
+ARM void TitleScreenManager::vfunc_14() {
+    this->mUnk_004.func_ov001_020bd734((unk32 *) data_ov025_020c5a0c);
+    this->mUnk_004.func_0201c00c(0x24, 1);
+
+    TitleScreen *pTitleScreen = new(HeapIndex_1) TitleScreen();
+    void *pUVar2              = pTitleScreen;
+    if (pTitleScreen != NULL) {
+        pUVar2 = &pTitleScreen->mUnk_04;
+    }
+    this->mpTitleScreen = pTitleScreen;
+
+    this->mUnk_104.mUnk_04.func_020166cc(pUVar2);
+    pTitleScreen->vfunc_18();
+}
+
+ARM void TitleScreenManager::vfunc_18() {
+    this->mUnk_004.func_ov001_020bd784();
+
+    delete this->mpTitleScreen;
+    this->mpTitleScreen = NULL;
+}
+
+ARM void TitleScreenManager::vfunc_24() {
+    this->GameModeManagerBase::vfunc_24();
+    this->func_0201875c();
+    this->func_02018908();
+}
+
+ARM void TitleScreenManager::vfunc_28(unk32 param1) {
+    this->GameModeManagerBase::vfunc_28(param1);
+    this->func_02018a14(param1);
+}
+
+ARM void TitleScreenManager::vfunc_2C(unk32 param1) {
+    this->func_02018984(param1);
+    this->func_02018830(param1);
+}
+
+ARM void TitleScreenManager::vfunc_38() {}
+
+ARM void TitleScreenManager::func_ov025_020c4c20() {
+    this->mpTitleScreen->func_ov025_020c4e6c();
+}
+
+ARM void TitleScreenManager::func_ov025_020c4c30() {
+    this->mpTitleScreen->func_ov025_020c4e90();
+}
+
+TitleScreenManager::~TitleScreenManager() {}