Starship/src/port/GBIMiddleware.cpp

#include <libultraship.h>

#include "Engine.h"
#include "DisplayList.h"
#include "Array.h"

extern "C" int GameEngine_OTRSigCheck(const char* data);

extern "C" void gSPDisplayList(Gfx* pkt, Gfx* dl) {
    char* imgData = (char*)dl;

    if (GameEngine_OTRSigCheck(imgData) == 1) {
        auto resource = LUS::Context::GetInstance()->GetResourceManager()->LoadResource(imgData);
        auto res = std::static_pointer_cast<LUS::DisplayList>(resource);
        dl = &res->Instructions[0];
        dl->words.trace.file = imgData;
        dl->words.trace.idx = 0;
        dl->words.trace.valid = true;
    }

    __gSPDisplayList(pkt, dl);
}

extern "C" void gSPVertex(Gfx* pkt, uintptr_t v, int n, int v0) {

    if (GameEngine_OTRSigCheck((char*)v) == 1) {
        v = (uintptr_t) ResourceGetDataByName((char *) v);
    }

    __gSPVertex(pkt, v, n, v0);
}

extern "C" void gSPInvalidateTexCache(Gfx* pkt, uintptr_t texAddr) {
    auto data = reinterpret_cast<char*>(texAddr);

    if (texAddr != 0 && GameEngine_OTRSigCheck(data)) {
        const auto res = LUS::Context::GetInstance()->GetResourceManager()->LoadResource(data);
        const auto type = static_cast<LUS::ResourceType>(res->GetInitData()->Type);

        switch(type) {
            case LUS::ResourceType::DisplayList:
                texAddr = reinterpret_cast<uintptr_t>(&std::static_pointer_cast<LUS::DisplayList>(res)->Instructions[0]);
                break;
            case LUS::ResourceType::Array:
                texAddr = reinterpret_cast<uintptr_t>(std::static_pointer_cast<LUS::Array>(res)->Vertices.data());
                break;
            default:
                texAddr = reinterpret_cast<uintptr_t>(res->GetRawPointer());
                break;
        }
    }

   __gSPInvalidateTexCache(pkt, texAddr);
}