newoswan/source/emulate.cpp

////////////////////////////////////////////////////////////////////////////////
// Main emulation loop
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//////////////////////////////////////////////////////////////////////////////

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>  /* UNIX standard function definitions */
#include <errno.h>   /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */
#include <sys/mman.h>

#include "log.h"
#include "io.h"
#include "ws.h"
#include "rom.h"
#include "./nec/nec.h"
#include "./nec/necintrf.h"
#include "gpu.h"
#include "audio.h"
#include "memory.h"

char        app_window_title[256];
int         app_gameRunning=0;
int         app_terminate=0;
int         app_fullscreen=0;
int         app_rotated=0;


int ws_key_esc = 0;


static void read_keys()
{
#if 0
    while ( SDL_PollEvent(&app_input_event) )
    {
       if ( app_input_event.type == SDL_QUIT )
       {
          ws_key_esc = 1;
       }
    }

#endif
    ws_key_start=0;
    ws_key_x4=0;
    ws_key_x2=0;
    ws_key_x1=0;
    ws_key_x3=0;
    ws_key_y4=0;
    ws_key_y2=0;
    ws_key_y1=0;
    ws_key_y3=0;
    ws_key_button_a=0;
    ws_key_button_b=0;

#if 0
    uint8_t *keystate = SDL_GetKeyState(NULL);

    if ( keystate[SDLK_e])
    {
       dump_memory();
    }

    if ( keystate[SDLK_r])
    {
       printf("Boop\n");
       ws_reset();
    }

    if ( keystate[SDLK_ESCAPE] )
    {
       ws_key_esc = 1;
    }

    if ( keystate[SDLK_UP] )
    {
       ws_key_x1=1;
    }

    if ( keystate[SDLK_DOWN] )
    {
       ws_key_x3=1;
    }

    if ( keystate[SDLK_RIGHT] )
    {
       ws_key_x2=1;
    }

    if ( keystate[SDLK_LEFT] )
    {
       ws_key_x4=1;
    }

    if (keystate[SDLK_RETURN])
    {
       ws_key_start=1;
    }

    if (keystate[SDLK_c])
    {
       ws_key_button_a=1;
    }

    if (keystate[SDLK_x])
    {
       ws_key_button_b=1;
    }

    if (keystate[SDLK_w])
    {
       ws_key_y1=1;
    }

    if (keystate[SDLK_a])
    {
       ws_key_y4=1;
    }

    if (keystate[SDLK_s])
    {
       ws_key_y3=1;
    }

    if (keystate[SDLK_d])
    {
       ws_key_y2=1;
    }

    if (keystate[SDLK_o])
    {
       ws_cyclesByLine+=10;
    }

    if (keystate[SDLK_l])
    {
       ws_cyclesByLine-=10;
    }
#endif
}

////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_emulate(void)
{
    // Placeholder
    read_keys();

    int32_t nCount = 0;
    int i = 0;

    double dTime = 0.0, dNormalLast = 0.0, dTemp;
    //int32_t surfacePitch;

// 15 bits RGB555
    //Format format(16, 0x007c00, 0x00003e0, 0x0000001f);
    //Surface *surface;
    //surface = new Surface(224 * 2, 144 * 2, format);
    int16_t *backbuffer = (int16_t *)malloc(224 * 144 * sizeof(int16_t));
    memset(backbuffer, 0x00, 224 * 144 * sizeof(int16_t));
    //surfacePitch = (surface->pitch() >> 1);

    //dNormalLast = (double)SDL_GetTicks();

    //console.open(app_window_title, 224 * 2, 144 * 2, format);

    while (1)
    {

        dTemp = 1;//(double)SDL_GetTicks();
        dTime = dTemp - dNormalLast;


        nCount = (int32_t)(dTime * 0.07547); // does this calculation make sense?

        if (nCount <= 0)
        {
            //SDL_Delay(2);
        } // No need to do anything for a bit
        else
        {

            dNormalLast += nCount * (1 / 0.07547);

            if (nCount > 10)
            {
                nCount = 10;
            }

            read_keys();

            if (ws_key_esc)
            {
                app_terminate = 1;

                if ((ws_rom_path != NULL) || (app_terminate))
                {
                    break;
                }

                //console.open(app_window_title, 224 * 2, 144 * 2, format);

            }


            for (i = 0 ; i < nCount - 1 ; i++)
            {
                while (!ws_executeLine(backbuffer, 0))
                {
                }
            }

            while (!ws_executeLine(backbuffer, 1))
            {
            }

            //int16_t *backbuffer_alias = backbuffer;

            //surface->unlock();
            //surface->copy(console);
            //console.update();
        }
        //console.close();
        //delete surface;
    }
}