typedef struct {
    DISPENV disp;
    DRAWENV draw;
    u_long  ot[8];
    POLY_FT4 dobik;
    POLY_FT4 tree;
} DB;

void init_robin(DB *db) {
    GsIMAGE tim1;

    /* Get texture information of TIM FORMAT */
    GsGetTimInfo((u_long *)(TEX_ADDR+4),&tim1);

    setPolyFT4(&db->dobik);
    setShadeTex(&db->dobik, 1);
    db->dobik.tpage = LoadTPage(tim1.pixel, 1, 0, 640, 0, 448, 64);
    db->dobik.clut = LoadClut(tim1.clut, 0, 275);
}

void bg_init(DB *db) {
    GsIMAGE bg_tim_data;
    GsGetTimInfo((u_long *)(BG_ADDR+4), &bg_tim_data);

    setPolyFT4(&db->tree);
    setShadeTex(&db->tree, 1);
    db->tree.tpage = LoadTPage(bg_tim_data.pixel, 1, 0, 640, 256, 512, 128);
    db->tree.clut = LoadClut(bg_tim_data.clut, 640, 489);
}


int main() {
    DB db[2];

    DB *cdb;

    u_long *ot;

    ResetGraph(0);

    SetDefDrawEnv(&db[0].draw, 0,   0, 320, 240);
    SetDefDrawEnv(&db[1].draw, 0, 240, 320, 240);
    SetDefDispEnv(&db[0].disp, 0, 240, 320, 240);
    SetDefDispEnv(&db[1].disp, 0,   0, 320, 240);

    bg_init(&db[0]);
    bg_init(&db[1]);
    init_robin(&db[0]);
    init_robin(&db[1]);

    SetDispMask(1);

    db[0].draw.isbg = 1;
    setRGB0(&db[0].draw, 60, 120, 120);

    db[1].draw.isbg = 1;
    setRGB0(&db[1].draw, 60, 120, 120);

    while (1) {
        cdb = (cdb==db)? db+1: db;

        ClearOTag(cdb->ot,8);

        setUVWH(&cdb->dobik, 0, 0, 64, 64);
        setXYWH(&cdb->dobik, 0, 0, 64, 64);
        setUVWH(&cdb->tree, 0, 0, 128, 128);
        setXYWH(&cdb->tree, 50, 50, 128, 128);


        ot = cdb->ot;

        AddPrim(&ot[0], &cdb->tree);
        AddPrim(&ot[1], &cdb->dobik);

        DrawSync(0);
        VSync(0);

        PutDrawEnv(&cdb->draw);
        PutDispEnv(&cdb->disp);

        DumpOTag(cdb->ot);
        DrawOTag(cdb->ot);
    }

    DrawSync(0);

    pollhost();
    return 0;
}