Supermodel/Src/OSD/SDL/Main.cpp

/**
 ** Supermodel
 ** A Sega Model 3 Arcade Emulator.
 ** Copyright 2011-2016 Bart Trzynadlowski, Nik Henson
 **
 ** This file is part of Supermodel.
 **
 ** Supermodel is free software: you can redistribute it and/or modify it under
 ** the terms of the GNU General Public License as published by the Free 
 ** Software Foundation, either version 3 of the License, or (at your option)
 ** any later version.
 **
 ** Supermodel is distributed in the hope that it will be useful, but WITHOUT
 ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 ** FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 ** more details.
 **
 ** You should have received a copy of the GNU General Public License along
 ** with Supermodel.  If not, see <http://www.gnu.org/licenses/>.
 **/
 
/*
 * Main.cpp
 * 
 * Main program driver for the SDL port.
 *
 * To Do Before Next Release
 * -------------------------
 * - Check to make sure save states use explicitly-sized types for 32/64-bit
 *   compatibility (i.e., size_t, int, etc. not allowed).
 * - Make sure quitting while paused works.
 * - Add UI keys for balance setting? 
 * - 5.1 audio support?
 * - Stretch video option
 *
 * Compile-Time Options
 * --------------------
 * - SUPERMODEL_WIN32: Define this if compiling on Windows.
 * - SUPERMODEL_OSX: Define this if compiling on Mac OS X.
 * - SUPERMODEL_DEBUGGER: Enable the debugger.
 * - DEBUG: Debug mode (use with caution, produces large logs of game behavior)
 */
 
#include <new>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <cstdarg>
#include <memory>
#include <vector>
#include "Pkgs/glew.h"
#ifdef SUPERMODEL_OSX
#include <SDL/SDL.h>
#else
#include <SDL.h>
#endif

#include "Supermodel.h"
#include "Util/Format.h"
#include "SDLInputSystem.h"
#ifdef SUPERMODEL_WIN32
#include "DirectInputSystem.h"
#include "WinOutputs.h"
#endif

// Log file names
#define DEBUG_LOG_FILE  "debug.log"
#define ERROR_LOG_FILE  "error.log"


/******************************************************************************
 Display Management
******************************************************************************/

/*
 * Position and size of rectangular region within OpenGL display to render to.
 * Unlike the g_Config object, these end up containing the actual resolution 
 * (and computed offsets within the viewport) that will be rendered based on
 * what was obtained from SDL.
 */
static unsigned  xOffset, yOffset;      // offset of renderer output within OpenGL viewport
static unsigned  xRes, yRes;            // renderer output resolution (can be smaller than GL viewport)
static unsigned  totalXRes, totalYRes;  // total resolution (the whole GL viewport)

static bool SetGLGeometry(unsigned *xOffsetPtr, unsigned *yOffsetPtr, unsigned *xResPtr, unsigned *yResPtr, unsigned *totalXResPtr, unsigned *totalYResPtr, bool keepAspectRatio)
{
  // What resolution did we actually get?
  const SDL_VideoInfo *VideoInfo = SDL_GetVideoInfo();
  *totalXResPtr = VideoInfo->current_w;
  *totalYResPtr = VideoInfo->current_h;
  
  // If required, fix the aspect ratio of the resolution that the user passed to match Model 3 ratio
  float xRes = float(*xResPtr);
  float yRes = float(*yResPtr);
  if (keepAspectRatio)
  {
    float model3Ratio = 496.0f/384.0f;
    if (yRes < (xRes/model3Ratio))
      xRes = yRes*model3Ratio;
    if (xRes < (yRes*model3Ratio))
    yRes = xRes/model3Ratio;
  }
    
  // Center the visible area 
  *xOffsetPtr = (*xResPtr - (unsigned) xRes)/2;
  *yOffsetPtr = (*yResPtr - (unsigned) yRes)/2;
  
  // If the desired resolution is smaller than what we got, re-center again
  if (int(*xResPtr) < VideoInfo->current_w)
    *xOffsetPtr += (VideoInfo->current_w - *xResPtr)/2;
  if (int(*yResPtr) < VideoInfo->current_h)
    *yOffsetPtr += (VideoInfo->current_h - *yResPtr)/2;
  
  // OpenGL initialization
  glViewport(0,0,*xResPtr,*yResPtr);
  glClearColor(0.0,0.0,0.0,0.0);
  glClearDepth(1.0);
  glDepthFunc(GL_LESS);
  glEnable(GL_DEPTH_TEST);
  glShadeModel(GL_SMOOTH);
  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
  glDisable(GL_CULL_FACE);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluPerspective(90.0,(GLfloat)xRes/(GLfloat)yRes,0.1,1e5);
  glMatrixMode(GL_MODELVIEW);
  
  // Clear both buffers to ensure a black border
  for (int i = 0; i < 2; i++)
  {
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    SDL_GL_SwapBuffers();
  }
  
  // Write back resolution parameters
  *xResPtr = (unsigned) xRes;
  *yResPtr = (unsigned) yRes;

  UINT32 correction = (UINT32)(((yRes / 384.f) * 2) + 0.5f);

  glEnable(GL_SCISSOR_TEST);
  
  // Scissor box (to clip visible area)
  if (g_Config.wideScreen)
  {
    glScissor(0, correction, *totalXResPtr, *totalYResPtr - (correction * 2));
  }
  else {
    glScissor(*xOffsetPtr + correction, *yOffsetPtr + correction, *xResPtr - (correction * 2), *yResPtr - (correction * 2));
  }
  return OKAY;
}

/*
 * CreateGLScreen():
 *
 * Creates an OpenGL display surface of the requested size. xOffset and yOffset
 * are used to return a display surface offset (for OpenGL viewport commands)
 * because the actual drawing area may need to be adjusted to preserve the 
 * Model 3 aspect ratio. The new resolution will be passed back as well -- both
 * the adjusted viewable area resolution and the total resolution.
 *
 * NOTE: keepAspectRatio should always be true. It has not yet been tested with
 * the wide screen hack.
 */
static bool CreateGLScreen(const char *caption, unsigned *xOffsetPtr, unsigned *yOffsetPtr, unsigned *xResPtr, unsigned *yResPtr, unsigned *totalXResPtr, unsigned *totalYResPtr, bool keepAspectRatio, bool fullScreen)
{
  GLenum err;
  
  // Initialize video subsystem
  if (SDL_InitSubSystem(SDL_INIT_VIDEO) != 0)
    return ErrorLog("Unable to initialize SDL video subsystem: %s\n", SDL_GetError());
    
  // Important GL attributes
  SDL_GL_SetAttribute(SDL_GL_RED_SIZE,8);
  SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE,8);
  SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE,8);
  SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,24);
  SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,8);
  SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);

  // Set vsync
  SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, (g_Config.vsync ? 1 : 0));

  // Set video mode
  if (SDL_SetVideoMode(*xResPtr,*yResPtr,0,SDL_OPENGL|(fullScreen?SDL_FULLSCREEN|SDL_HWSURFACE:0)) == NULL)
  {
    ErrorLog("Unable to create an OpenGL display: %s\n", SDL_GetError());
    return FAIL;
  }
    
  // Create window caption
  SDL_WM_SetCaption(caption,NULL);
    
  // Initialize GLEW, allowing us to use features beyond OpenGL 1.2
  err = glewInit();
  if (GLEW_OK != err)
  {
    ErrorLog("OpenGL initialization failed: %s\n", glewGetErrorString(err));
    return FAIL;
  }
    
  return SetGLGeometry(xOffsetPtr, yOffsetPtr, xResPtr, yResPtr, totalXResPtr, totalYResPtr, keepAspectRatio);
}

static bool ResizeGLScreen(unsigned *xOffsetPtr, unsigned *yOffsetPtr, unsigned *xResPtr, unsigned *yResPtr, unsigned *totalXResPtr, unsigned *totalYResPtr, bool keepAspectRatio, bool fullScreen)
{
  // Set video mode
  if (SDL_SetVideoMode(*xResPtr,*yResPtr,0,SDL_OPENGL|(fullScreen?SDL_FULLSCREEN|SDL_HWSURFACE:0)) == NULL)
  {
    ErrorLog("Unable to create an OpenGL display: %s\n", SDL_GetError());
    return FAIL;
  }
    
  return SetGLGeometry(xOffsetPtr, yOffsetPtr, xResPtr, yResPtr, totalXResPtr, totalYResPtr, keepAspectRatio);
}

/*
 * PrintGLInfo():
 *
 * Queries and prints OpenGL information. A full list of extensions can
 * optionally be printed.
 */
static void PrintGLInfo(bool createScreen, bool infoLog, bool printExtensions)
{
  unsigned xOffset, yOffset, xRes=496, yRes=384, totalXRes, totalYRes;  
  if (createScreen)
  {
    if (OKAY != CreateGLScreen("Supermodel - Querying OpenGL Information...", &xOffset, &yOffset, &xRes, &yRes, &totalXRes, &totalYRes, false, false))
    {
      ErrorLog("Unable to query OpenGL.\n");
      return;
    }
  }
  
  GLint value;
  if (infoLog)  InfoLog("OpenGL information:");
  else             puts("OpenGL information:\n");
  const GLubyte *str = glGetString(GL_VENDOR);
  if (infoLog)  InfoLog("  Vendor                   : %s", str);
  else           printf("  Vendor                   : %s\n", str);
  str = glGetString(GL_RENDERER);
  if (infoLog)  InfoLog("  Renderer                 : %s", str);
  else           printf("  Renderer                 : %s\n", str);
  str = glGetString(GL_VERSION);
  if (infoLog)  InfoLog("  Version                  : %s", str);
  else           printf("  Version                  : %s\n", str);
  str = glGetString(GL_SHADING_LANGUAGE_VERSION);
  if (infoLog)  InfoLog("  Shading Language Version : %s", str);
  else           printf("  Shading Language Version : %s\n", str);
  glGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &value);
  if (infoLog)  InfoLog("  Maximum Vertex Array Size: %d vertices", value);
  else           printf("  Maximum Vertex Array Size: %d vertices\n", value);
  glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
  if (infoLog)  InfoLog("  Maximum Texture Size     : %d texels", value);
  else           printf("  Maximum Texture Size     : %d texels\n", value);
  glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &value);
  if (infoLog)  InfoLog("  Maximum Vertex Attributes: %d", value);
  else           printf("  Maximum Vertex Attributes: %d\n", value);
  glGetIntegerv(GL_MAX_VERTEX_UNIFORM_COMPONENTS, &value);
  if (infoLog)  InfoLog("  Maximum Vertex Uniforms  : %d", value);
  else           printf("  Maximum Vertex Uniforms  : %d\n", value);
  glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &value);
  if (infoLog)  InfoLog("  Maximum Texture Img Units: %d", value);
  else           printf("  Maximum Texture Img Units: %d\n", value);
  if (printExtensions)
  {
    str = glGetString(GL_EXTENSIONS);
    char *strLocal = (char *) malloc((strlen((char *) str)+1)*sizeof(char));
    if (NULL == strLocal)
    {
      if (infoLog)  InfoLog("  Supported Extensions     : %s", str);
      else           printf("  Supported Extensions     : %s\n", str);
    }
    else
    {
      strcpy(strLocal, (char *) str);
      if (infoLog)  InfoLog("  Supported Extensions     : %s", (strLocal = strtok(strLocal, " \t\n")));
      else           printf("  Supported Extensions     : %s\n", (strLocal = strtok(strLocal, " \t\n")));
      while ((strLocal = strtok(NULL, " \t\n")) != NULL)
      {
        if (infoLog)  InfoLog("                             %s", strLocal);
        else           printf("                             %s\n", strLocal);
      }
    }
  }
  if (infoLog)  InfoLog("");
  else      printf("\n");
}

#ifdef DEBUG
static void PrintBAT(unsigned regu, unsigned regl)
{
  uint32_t batu = ppc_read_spr(regu);
  uint32_t batl = ppc_read_spr(regl);
  uint32_t bepi = batu >> (31 - 14);
  uint32_t bl = (batu >> (31 - 29)) & 0x7ff;
  bool vs = batu & 2;
  bool vp = batu & 1;
  uint32_t brpn = batl >> (31 - 14);
  uint32_t wimg = (batl >> (31 - 28)) & 0xf;
  uint32_t pp = batl & 3;
  uint32_t size = (bl + 1) * 128 * 1024;
  uint32_t ea_base = bepi << (31 - 14);
  uint32_t ea_limit = ea_base + size - 1;
  uint32_t pa_base = brpn << (31 - 14);
  uint32_t pa_limit = pa_base + size - 1;  
  printf("%08X-%08X -> %08X-%08X ", ea_base, ea_limit, pa_base, pa_limit);
  printf("%c%c%c%c ", (wimg&8)?'W':'-', (wimg&4)?'I':'-', (wimg&2)?'M':'-', (wimg&1)?'G':'-');
  printf("PP=");
  if (pp == 0)
    printf("NA");
  else if (pp == 2)
    printf("RW");
  else
    printf("RO");
  printf(" Vs=%d Vp=%d", vs, vp);
}
#endif

#ifdef DEBUG
static void DumpPPCRegisters(IBus *bus)
{
  for (int i = 0; i < 32; i += 4)
  {
    printf("R%d=%08X\tR%d=%08X\tR%d=%08X\tR%d=%08X\n",
           i + 0, ppc_get_gpr(i + 0),
           i + 1, ppc_get_gpr(i + 1),
           i + 2, ppc_get_gpr(i + 2),
           i + 3, ppc_get_gpr(i + 3));
  }
  printf("PC =%08X\n", ppc_get_pc());
  printf("LR =%08X\n", ppc_get_lr());
  printf("DBAT0U=%08X\tIBAT0U=%08X\n", ppc_read_spr(SPR603E_DBAT0U), ppc_read_spr(SPR603E_IBAT0U));
  printf("DBAT0L=%08X\tIBAT0L=%08X\n", ppc_read_spr(SPR603E_DBAT0L), ppc_read_spr(SPR603E_IBAT0L));
  printf("DBAT1U=%08X\tIBAT1U=%08X\n", ppc_read_spr(SPR603E_DBAT1U), ppc_read_spr(SPR603E_IBAT1U));
  printf("DBAT1L=%08X\tIBAT1L=%08X\n", ppc_read_spr(SPR603E_DBAT1L), ppc_read_spr(SPR603E_IBAT1L));
  printf("DBAT2U=%08X\tIBAT2U=%08X\n", ppc_read_spr(SPR603E_DBAT2U), ppc_read_spr(SPR603E_IBAT2U));
  printf("DBAT2L=%08X\tIBAT2L=%08X\n", ppc_read_spr(SPR603E_DBAT2L), ppc_read_spr(SPR603E_IBAT2L));
  printf("DBAT3U=%08X\tIBAT3U=%08X\n", ppc_read_spr(SPR603E_DBAT3U), ppc_read_spr(SPR603E_IBAT3U));
  printf("DBAT3L=%08X\tIBAT3L=%08X\n", ppc_read_spr(SPR603E_DBAT3L), ppc_read_spr(SPR603E_IBAT3L));
  for (int i = 0; i < 10; i++)
    printf("SR%d =%08X VSID=%06X\n", i, ppc_read_sr(i), ppc_read_sr(i) & 0x00ffffff);
  for (int i = 10; i < 16; i++)
    printf("SR%d=%08X VSID=%06X\n", i, ppc_read_sr(i), ppc_read_sr(i) & 0x00ffffff);
  printf("SDR1=%08X\n", ppc_read_spr(SPR603E_SDR1));
  printf("\n");
  printf("DBAT0: "); PrintBAT(SPR603E_DBAT0U, SPR603E_DBAT0L); printf("\n");
  printf("DBAT1: "); PrintBAT(SPR603E_DBAT1U, SPR603E_DBAT1L); printf("\n");
  printf("DBAT2: "); PrintBAT(SPR603E_DBAT2U, SPR603E_DBAT2L); printf("\n");
  printf("DBAT3: "); PrintBAT(SPR603E_DBAT3U, SPR603E_DBAT3L); printf("\n");
  printf("IBAT0: "); PrintBAT(SPR603E_IBAT0U, SPR603E_IBAT0L); printf("\n");
  printf("IBAT1: "); PrintBAT(SPR603E_IBAT1U, SPR603E_IBAT1L); printf("\n");
  printf("IBAT2: "); PrintBAT(SPR603E_IBAT2U, SPR603E_IBAT2L); printf("\n");
  printf("IBAT3: "); PrintBAT(SPR603E_IBAT3U, SPR603E_IBAT3L); printf("\n");
  printf("\n");
  /*
  printf("First PTEG:\n");
  uint32_t ptab = ppc_read_spr(SPR603E_SDR1) & 0xffff0000;
  for (int i = 0; i < 65536/8; i++)
  {
    uint64_t pte = bus->Read64(ptab + i*8);
    uint32_t vsid = (pte >> (32 + (31 - 24))) & 0x00ffffff;
    uint32_t rpn = pte & 0xfffff000;
    int wimg = (pte >> 3) & 0xf;
    bool v = pte & 0x8000000000000000ULL;
    printf("  %d: %016llX V=%d VSID=%06X RPN=%08X WIMG=%c%c%c%c\n", i, pte, v, vsid, rpn, (wimg&8)?'W':'-', (wimg&4)?'I':'-', (wimg&2)?'M':'-', (wimg&1)?'G':'-');
  }
  */
}
#endif


/******************************************************************************
 Render State Analysis
******************************************************************************/

#ifdef DEBUG

#include "Model3/Model3GraphicsState.h"
#include "Util/BMPFile.h"
#include "OSD/SDL/PolyAnalysis.h"

static void SaveFrameBuffer(const std::string &file)
{
  std::shared_ptr<uint8_t> pixels(new uint8_t[totalXRes*totalYRes*4], std::default_delete<uint8_t[]>());
  glReadPixels(0, 0, totalXRes, totalYRes, GL_RGBA, GL_UNSIGNED_BYTE, pixels.get());
  Util::WriteSurfaceToBMP<Util::RGBA8>(file, pixels.get(), totalXRes, totalYRes, true);
}

bool g_forceFlushModels = false;
int g_testPolyHeaderIdx = -1;
uint32_t g_testPolyHeaderMask = 0;
static std::string s_gfxStatePath;
  
static std::string GetFileBaseName(const std::string &file)
{
  std::string base = file;
  size_t pos = file.find_last_of('/');
  if (pos != std::string::npos)
    base = file.substr(pos + 1);
  pos = file.find_last_of('\\');
  if (pos != std::string::npos)
    base = file.substr(pos + 1);
  return base;
}

static void TestPolygonHeaderBits(IEmulator *Emu)
{
  const static std::vector<uint32_t> unknownPolyBits
  {
    0x000003b0,
    0x000000ab, // actual color
    0x000000fc,
    0x000000c0,
    0x000000a0,
    0xffffff60,
    0xff0300ff  // contour, luminous, etc.
  };

  GLint readBuffer;
  glGetIntegerv(GL_READ_BUFFER, &readBuffer);
  glReadBuffer(GL_FRONT);

  // Render separate image for each unknown bit
  g_forceFlushModels = true;
  for (int idx = 0; idx < 7; idx++)
  {
    for (int bit = 0; bit < 32; bit++)
    {
      uint32_t mask = 1 << bit;
      g_testPolyHeaderIdx = idx;
      g_testPolyHeaderMask = mask;
      if ((unknownPolyBits[idx] & mask))
      {
        Emu->RenderFrame();
        std::string file = Util::Format() << "Analysis/" << GetFileBaseName(s_gfxStatePath) << "." << idx << "_" << Util::Hex(mask) << ".bmp";
        SaveFrameBuffer(file);
      }
    }
  }

  glReadBuffer(readBuffer);

  // Generate the HTML GUI
  std::string file = Util::Format() << "Analysis/_" << GetFileBaseName(s_gfxStatePath) << ".html";
  std::ofstream fs(file);  
  if (!fs.good())
    ErrorLog("Unable to open '%s' for writing.", file.c_str());
  else
  {
    std::string contents = s_polyAnalysisHTMLPrologue;
    contents += "    var g_file_base_name = '" + GetFileBaseName(s_gfxStatePath) + "';\n";  
    contents += "    var g_unknown_bits = [" + std::string(Util::Format(",").Join(unknownPolyBits)) + "];\n";
    contents += s_polyAnalysisHTMLEpilogue;
    fs << contents;
    printf("Produced: %s\n", file.c_str());
  }
}

#endif


/******************************************************************************
 Configuration
 
 Configuration file management and input settings.
******************************************************************************/

static const char s_configFilePath[] = { "Config/Supermodel.ini" };

// Create and configure inputs
static bool ConfigureInputs(CInputs *Inputs, bool configure)
{
  static const char configFileComment[] = {
    ";\n"
    "; Supermodel Configuration File\n"
    ";\n"
  };
  
  // Open and parse configuration file
  CINIFile INI;
  INI.Open(s_configFilePath); // doesn't matter if it exists or not, will get overwritten
  INI.SetDefaultSectionName("Global");
  INI.Parse();
  
  Inputs->ReadFromINIFile(&INI, "Global");
    
  // If the user wants to configure the inputs, do that now
  if (configure)
  {
    // Open an SDL window 
    unsigned xOffset, yOffset, xRes=496, yRes=384;
    if (OKAY != CreateGLScreen("Supermodel - Configuring Inputs...", &xOffset, &yOffset, &xRes, &yRes, &totalXRes, &totalYRes, false, false))
      return (bool) ErrorLog("Unable to start SDL to configure inputs.\n");
    
    // Configure the inputs
    if (Inputs->ConfigureInputs(NULL, xOffset, yOffset, xRes, yRes))
    {
      // Write input configuration and input system settings to config file
      Inputs->WriteToINIFile(&INI, "Global");
    
      if (OKAY != INI.Write(configFileComment))
        ErrorLog("Unable to save configuration to '%s'.", s_configFilePath);
      else
        printf("Configuration successfully saved to '%s'.\n", s_configFilePath);
    }
    else
      puts("Configuration aborted...");
    puts("");
  }
  
  INI.Close();
  return OKAY;
}

// Apply configuration settings from configuration file (does NOT read input settings; see ConfigureInputs())
static void ApplySettings(CINIFile *INI, const char *section)
{
  unsigned  x;
  int       y;
  string    String;
  
  // Model 3
  INI->Get(section, "MultiThreaded", g_Config.multiThreaded);
  INI->Get(section, "GPUMultiThreaded", g_Config.gpuMultiThreaded);
  if (OKAY == INI->Get(section, "PowerPCFrequency", x))
    g_Config.SetPowerPCFrequency(x);
  
  // 3D renderer
  INI->Get(section, "VertexShader", g_Config.vertexShaderFile);
  INI->Get(section, "FragmentShader", g_Config.fragmentShaderFile);
  
  // SCSP and DSB
  if (OKAY == INI->Get(section, "SoundVolume", x))
    g_Config.SetSoundVolume(x);
  if (OKAY == INI->Get(section, "MusicVolume", x))
    g_Config.SetMusicVolume(x);
  if (OKAY == INI->Get(section, "Balance", y))
    g_Config.SetSCSPBalance(y);
  INI->Get(section, "EmulateSound", g_Config.emulateSound);
  INI->Get(section, "EmulateDSB", g_Config.emulateDSB);

  // Drive board
#ifdef SUPERMODEL_WIN32
  INI->Get(section, "ForceFeedback", g_Config.forceFeedback);
#endif // SUPERMODEL_WIN32
  
  // OSD
  INI->Get(section, "New3DEngine", g_Config.new3DEngine);
  INI->Get(section, "XResolution", g_Config.xRes);
  INI->Get(section, "YResolution", g_Config.yRes);
  INI->Get(section, "FullScreen", g_Config.fullScreen);
  INI->Get(section, "WideScreen", g_Config.wideScreen);
  INI->Get(section, "MultiTexture", g_Config.multiTexture);
  INI->Get(section, "VSync", g_Config.vsync);
  INI->Get(section, "Throttle", g_Config.throttle);
  INI->Get(section, "ShowFrameRate", g_Config.showFPS);
  INI->Get(section, "Crosshairs", g_Config.crosshairs);
  INI->Get(section, "FlipStereo", g_Config.flipStereo);

#ifdef SUPERMODEL_WIN32
  // DirectInput ForceFeedback
  INI->Get(section, "DirectInputConstForceMax", g_Config.dInputConstForceLeftMax);
  INI->Get(section, "DirectInputConstForceMax", g_Config.dInputConstForceRightMax);
  INI->Get(section, "DirectInputConstForceLeftMax", g_Config.dInputConstForceLeftMax);
  INI->Get(section, "DirectInputConstForceRightMax", g_Config.dInputConstForceRightMax);
  INI->Get(section, "DirectInputSelfCenterMax", g_Config.dInputSelfCenterMax);
  INI->Get(section, "DirectInputFrictionMax", g_Config.dInputFrictionMax);
  INI->Get(section, "DirectInputVibrateMax", g_Config.dInputVibrateMax);

  // XInput ForceFeedback
  INI->Get(section, "XInputConstForceThreshold", g_Config.xInputConstForceThreshold);
  INI->Get(section, "XInputConstForceMax", g_Config.xInputConstForceMax);
  INI->Get(section, "XInputVibrateMax", g_Config.xInputVibrateMax);
#endif // SUPERMODEL_WIN32
}

// Read settings (from a specific section) from the config file
static void ReadConfigFile(const char *section)
{
  CINIFile  INI;  
  
  INI.Open(s_configFilePath);
  INI.SetDefaultSectionName("Global");  // required to read settings not associated with a specific section
  INI.Parse();
  ApplySettings(&INI, section);
  INI.Close();
}

// Log the configuration to info log
static void LogConfig(void)
{
  InfoLog("Program settings:");
  
  // COSDConfig
  InfoLog("\tNew3DEngine                   = %d", g_Config.new3DEngine);
  InfoLog("\tXResolution                   = %d", g_Config.xRes);
  InfoLog("\tYResolution                   = %d", g_Config.yRes);
  InfoLog("\tFullScreen                    = %d", g_Config.fullScreen);
  InfoLog("\tWideScreen                    = %d", g_Config.wideScreen);
  InfoLog("\tVSync                         = %d", g_Config.vsync);
  InfoLog("\tMultiTexture                  = %d", g_Config.multiTexture);
  InfoLog("\tThrottle                      = %d", g_Config.throttle);
  InfoLog("\tShowFrameRate                 = %d", g_Config.showFPS);
  InfoLog("\tCrosshairs                    = %d", g_Config.crosshairs);
#ifdef SUPERMODEL_DEBUGGER
  InfoLog("\tDisableDebugger               = %d", g_Config.disableDebugger);
#endif
  InfoLog("\tInputSystem                   = %s", g_Config.GetInputSystem());
  InfoLog("\tOutputs                       = %s", g_Config.GetOutputs());
  InfoLog("\tFlipStereo                    = %d", g_Config.flipStereo);
  
#ifdef SUPERMODEL_WIN32
  // DirectInput ForceFeedback
  InfoLog("\tDirectInputConstForceLeftMax  = %u", g_Config.dInputConstForceLeftMax);
  InfoLog("\tDirectInputConstForceRightMax = %u", g_Config.dInputConstForceRightMax);
  InfoLog("\tDirectInputSelfCenterMax      = %u", g_Config.dInputSelfCenterMax);
  InfoLog("\tDirectInputFrictionMax        = %u", g_Config.dInputFrictionMax);
  InfoLog("\tDirectInputVibrateMax         = %u", g_Config.dInputVibrateMax);

  // XInput ForceFeedback
  InfoLog("\tXInputConstForceThreshold     = %u", g_Config.xInputConstForceThreshold);
  InfoLog("\tXInputConstForceMax           = %u", g_Config.xInputConstForceMax);
  InfoLog("\tXInputVibrateMax              = %u", g_Config.xInputVibrateMax);
#endif // SUPERMODEL_WIN32

  // CModel3Config
  InfoLog("\tMultiThreaded                 = %d", g_Config.multiThreaded);
  InfoLog("\tGPUMultiThreaded              = %d", g_Config.gpuMultiThreaded);
  InfoLog("\tPowerPCFrequency              = %d", g_Config.GetPowerPCFrequency());
  
  // CSoundBoardConfig
  InfoLog("\tEmulateSound                  = %d", g_Config.emulateSound);
  InfoLog("\tBalance                       = %d", g_Config.GetSCSPBalance());
  
  // CDSBConfig
  InfoLog("\tEmulateDSB                    = %d", g_Config.emulateDSB);
  InfoLog("\tSoundVolume                   = %d", g_Config.GetSoundVolume());
  InfoLog("\tMusicVolume                   = %d", g_Config.GetMusicVolume());
  
  // CDriveBoardConfig
#ifdef SUPERMODEL_WIN32
  InfoLog("\tForceFeedback                 = %d", g_Config.forceFeedback);
#endif

  // CLegacy3DConfig
  InfoLog("\tVertexShader                  = %s", g_Config.vertexShaderFile.c_str());
  InfoLog("\tFragmentShader                = %s", g_Config.fragmentShaderFile.c_str());

  InfoLog("");
}


/******************************************************************************
 Save States and NVRAM
 
 Save states and NVRAM use the same basic format. When anything changes that
 breaks compatibility with previous versions of Supermodel, the save state
 and NVRAM version numbers must be incremented as needed.
 
 Header block name: "Supermodel Save State" or "Supermodel NVRAM State"
 Data: Save state file version (4-byte integer), ROM set ID (up to 9 bytes, 
 including terminating \0).
 
 Different subsystems output their own blocks.
******************************************************************************/

static const int STATE_FILE_VERSION = 2;  // save state file version
static const int NVRAM_FILE_VERSION = 0;  // NVRAM file version
static unsigned s_saveSlot = 0;           // save state slot #

static void SaveState(IEmulator *Model3)
{
  CBlockFile  SaveState;
  
  char filePath[24];
  sprintf(filePath, "Saves/%s.st%d", Model3->GetGameInfo()->id, s_saveSlot);
  if (OKAY != SaveState.Create(filePath, "Supermodel Save State", "Supermodel Version " SUPERMODEL_VERSION))
  {
    ErrorLog("Unable to save state to '%s'.", filePath);
    return;
  }
  
  // Write file format version and ROM set ID to header block 
  int32_t fileVersion = STATE_FILE_VERSION;
  SaveState.Write(&fileVersion, sizeof(fileVersion));
  SaveState.Write(Model3->GetGameInfo()->id, strlen(Model3->GetGameInfo()->id)+1);
  
  // Save state
  Model3->SaveState(&SaveState);
  SaveState.Close();
  printf("Saved state to '%s'.\n", filePath);
  DebugLog("Saved state to '%s'.\n", filePath);
}

static void LoadState(IEmulator *Model3)
{
  CBlockFile  SaveState;
  
  // Generate file path
  char filePath[24];
  sprintf(filePath, "Saves/%s.st%d", Model3->GetGameInfo()->id, s_saveSlot);
  
  // Open and check to make sure format is correct
  if (OKAY != SaveState.Load(filePath))
  {
    ErrorLog("Unable to load state from '%s'.", filePath);
    return;
  }
  
  if (OKAY != SaveState.FindBlock("Supermodel Save State"))
  {
    ErrorLog("'%s' does not appear to be a valid save state file.", filePath);
    return;
  }
  
  int32_t fileVersion;
  SaveState.Read(&fileVersion, sizeof(fileVersion));
  if (fileVersion != STATE_FILE_VERSION)
  {
    ErrorLog("'%s' is incompatible with this version of Supermodel.", filePath);
    return;
  }
  
  // Load
  Model3->LoadState(&SaveState);
  SaveState.Close();
  printf("Loaded state from '%s'.\n", filePath);
  DebugLog("Loaded state from '%s'.\n", filePath);
}

static void SaveNVRAM(IEmulator *Model3)
{
  CBlockFile  NVRAM;
  
  char filePath[24];
  sprintf(filePath, "NVRAM/%s.nv", Model3->GetGameInfo()->id);
  if (OKAY != NVRAM.Create(filePath, "Supermodel NVRAM State", "Supermodel Version " SUPERMODEL_VERSION))
  {
    ErrorLog("Unable to save NVRAM to '%s'. Make sure directory exists!", filePath);
    return;
  }
  
  // Write file format version and ROM set ID to header block 
  int32_t fileVersion = NVRAM_FILE_VERSION;
  NVRAM.Write(&fileVersion, sizeof(fileVersion));
  NVRAM.Write(Model3->GetGameInfo()->id, strlen(Model3->GetGameInfo()->id)+1);
  
  // Save NVRAM
  Model3->SaveNVRAM(&NVRAM);
  NVRAM.Close();
  DebugLog("Saved NVRAM to '%s'.\n", filePath);
}

static void LoadNVRAM(IEmulator *Model3)
{
  CBlockFile  NVRAM;
  
  // Generate file path
  char filePath[24];
  sprintf(filePath, "NVRAM/%s.nv", Model3->GetGameInfo()->id);
  
  // Open and check to make sure format is correct
  if (OKAY != NVRAM.Load(filePath))
  {
    //ErrorLog("Unable to restore NVRAM from '%s'.", filePath);
    return;
  }
  
  if (OKAY != NVRAM.FindBlock("Supermodel NVRAM State"))
  {
    ErrorLog("'%s' does not appear to be a valid NVRAM file.", filePath);
    return;
  }
  
  int32_t fileVersion;
  NVRAM.Read(&fileVersion, sizeof(fileVersion));
  if (fileVersion != NVRAM_FILE_VERSION)
  {
    ErrorLog("'%s' is incompatible with this version of Supermodel.", filePath);
    return;
  }
  
  // Load
  Model3->LoadNVRAM(&NVRAM);
  NVRAM.Close();
  DebugLog("Loaded NVRAM from '%s'.\n", filePath);
}


/******************************************************************************
 UI Rendering
 
 Currently, only does crosshairs for light gun games.
******************************************************************************/

static void GunToViewCoords(float *x, float *y)
{
  *x = (*x-150.0f)/(651.0f-150.0f); // Scale [150,651] -> [0.0,1.0]
  *y = (*y-80.0f)/(465.0f-80.0f);   // Scale [80,465] -> [0.0,1.0]
}

static void DrawCrosshair(float x, float y, float r, float g, float b)
{
  float base = 0.01f, height = 0.02f; // geometric parameters of each triangle
  float dist = 0.004f;          // distance of triangle tip from center
  float a = (float)xRes/(float)yRes;  // aspect ratio (to square the crosshair)
  
  glColor3f(r, g, b);
  glVertex2f(x, y+dist);  // bottom triangle
  glVertex2f(x+base/2.0f, y+(dist+height)*a);
  glVertex2f(x-base/2.0f, y+(dist+height)*a); 
  glVertex2f(x, y-dist);  // top triangle
  glVertex2f(x-base/2.0f, y-(dist+height)*a);
  glVertex2f(x+base/2.0f, y-(dist+height)*a);
  glVertex2f(x-dist, y);  // left triangle
  glVertex2f(x-dist-height, y+(base/2.0f)*a);
  glVertex2f(x-dist-height, y-(base/2.0f)*a);
  glVertex2f(x+dist, y);  // right triangle
  glVertex2f(x+dist+height, y-(base/2.0f)*a);
  glVertex2f(x+dist+height, y+(base/2.0f)*a);
}

/*
static void PrintGLError(GLenum error)
{
  switch (error)
  {
  case GL_INVALID_ENUM:       printf("invalid enum\n"); break;
  case GL_INVALID_VALUE:      printf("invalid value\n"); break;
  case GL_INVALID_OPERATION:  printf("invalid operation\n"); break;
  case GL_STACK_OVERFLOW:     printf("stack overflow\n"); break;
  case GL_STACK_UNDERFLOW:    printf("stack underflow\n"); break;
  case GL_OUT_OF_MEMORY:      printf("out of memory\n"); break;
  case GL_TABLE_TOO_LARGE:    printf("table too large\n"); break;
  case GL_NO_ERROR:           break;
  default:                    printf("unknown error\n"); break;
  }
}
*/

static void UpdateCrosshairs(CInputs *Inputs, unsigned crosshairs)
{
  float x[2], y[2];
  
  crosshairs &= 3;
  if (!crosshairs)
    return;
    
  // Set up the viewport and orthogonal projection
  glUseProgram(0);    // no shaders
  glViewport(xOffset, yOffset, xRes, yRes);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  gluOrtho2D(0.0, 1.0, 1.0, 0.0);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  glDisable(GL_TEXTURE_2D); // no texture mapping
  glDisable(GL_BLEND);    // no blending
  glDisable(GL_DEPTH_TEST); // no Z-buffering needed  
  glDisable(GL_LIGHTING);
  
  // Convert gun coordinates to viewspace coordinates
  x[0] = (float) Inputs->gunX[0]->value;
  y[0] = (float) Inputs->gunY[0]->value;
  x[1] = (float) Inputs->gunX[1]->value;
  y[1] = (float) Inputs->gunY[1]->value;
  GunToViewCoords(&x[0], &y[0]);
  GunToViewCoords(&x[1], &y[1]);
  
  // Draw visible crosshairs  
  glBegin(GL_TRIANGLES);
  if ((crosshairs & 1) && !Inputs->trigger[0]->offscreenValue)  // Player 1
    DrawCrosshair(x[0], y[0], 1.0f, 0.0f, 0.0f);
  if ((crosshairs & 2) && !Inputs->trigger[1]->offscreenValue)  // Player 2
    DrawCrosshair(x[1], y[1], 0.0f, 1.0f, 0.0f);
  glEnd();
  
  //PrintGLError(glGetError());
}

  
/******************************************************************************
 Video Callbacks
******************************************************************************/

static CInputs *videoInputs = NULL;

bool BeginFrameVideo()
{
  return true;
}

void EndFrameVideo()
{
  // Show crosshairs for light gun games
  if (videoInputs)
    UpdateCrosshairs(videoInputs, g_Config.crosshairs);

  // Swap the buffers
  SDL_GL_SwapBuffers();
}

static void SuperSleep(UINT32 time)
{
	UINT32 start = SDL_GetTicks();
	UINT32 tics  = start;

	while (start + time > tics) {
		tics = SDL_GetTicks();
	}
}

/******************************************************************************
 Main Program Loop
******************************************************************************/

#ifdef SUPERMODEL_DEBUGGER
int Supermodel(const char *zipFile, IEmulator *Model3, CInputs *Inputs, COutputs *Outputs, Debugger::CDebugger *Debugger, CINIFile *CmdLine)
{
  CLogger *oldLogger = 0;
#else
int Supermodel(const char *zipFile, IEmulator *Model3, CInputs *Inputs, COutputs *Outputs, CINIFile *CmdLine)
{         
#endif // SUPERMODEL_DEBUGGER
  unsigned  prevFPSTicks;
	unsigned  fpsFramesElapsed;
	bool      gameHasLightguns = false;
	bool      quit = false;
	bool      paused = false;
	bool      dumpTimings = false;

  // Initialize and load ROMs
  if (OKAY != Model3->Init())
    return 1;
  if (OKAY != Model3->LoadROMSet(g_Model3GameList, zipFile))
    return 1;
    
  // Apply game-specific settings and then, lastly, command line settings
  ReadConfigFile(Model3->GetGameInfo()->id);
  ApplySettings(CmdLine, "Global");
    
  // Load NVRAM
  LoadNVRAM(Model3);
    
  // Start up SDL and open a GL window
  char baseTitleStr[128];
  char titleStr[128];
  totalXRes = xRes = g_Config.xRes;
  totalYRes = yRes = g_Config.yRes;
  sprintf(baseTitleStr, "Supermodel - %s", Model3->GetGameInfo()->title);
  if (OKAY != CreateGLScreen(baseTitleStr, &xOffset, &yOffset ,&xRes, &yRes, &totalXRes, &totalYRes, true, g_Config.fullScreen))
    return 1;
    
  // Info log GL information and user options
  PrintGLInfo(false, true, false);
  LogConfig();
  
  // Initialize audio system
  if (OKAY != OpenAudio())
    return 1;

  // Hide mouse if fullscreen, enable crosshairs for gun games
  Inputs->GetInputSystem()->SetMouseVisibility(!g_Config.fullScreen);
  gameHasLightguns = !!(Model3->GetGameInfo()->inputFlags & (GAME_INPUT_GUN1|GAME_INPUT_GUN2));
  if (gameHasLightguns)
    videoInputs = Inputs;
  else
    videoInputs = NULL;

  // Attach the inputs to the emulator
  Model3->AttachInputs(Inputs);

  // Attach the outputs to the emulator
  if (Outputs != NULL)
    Model3->AttachOutputs(Outputs);
  
  // Initialize the renderers
  CRender2D *Render2D = new CRender2D();
  IRender3D *Render3D = g_Config.new3DEngine ? ((IRender3D *) new New3D::CNew3D()) : ((IRender3D *) new Legacy3D::CLegacy3D());
  if (OKAY != Render2D->Init(xOffset, yOffset, xRes, yRes, totalXRes, totalYRes))
    goto QuitError;
  if (OKAY != Render3D->Init(xOffset, yOffset, xRes, yRes, totalXRes, totalYRes))
    goto QuitError;
  Model3->AttachRenderers(Render2D,Render3D);

  // Reset emulator
  Model3->Reset();
  
#ifdef SUPERMODEL_DEBUGGER
  // If debugger was supplied, set it as logger and attach it to system
  oldLogger = GetLogger();
  if (Debugger != NULL)
  {
    SetLogger(Debugger);
    Debugger->Attach();
  }
#endif // SUPERMODEL_DEBUGGER

  // Emulate!
  fpsFramesElapsed = 0;
  prevFPSTicks = SDL_GetTicks();
  quit = false;
  paused = false;
  dumpTimings = false;
#ifdef DEBUG
  if (dynamic_cast<CModel3GraphicsState *>(Model3))
  {
    TestPolygonHeaderBits(Model3);
    quit = true;
  }
#endif
  while (!quit)
  {
	  auto startTime = SDL_GetTicks();

    // Render if paused, otherwise run a frame
    if (paused)
      Model3->RenderFrame();
    else
      Model3->RunFrame();
    
    // Poll the inputs
    if (!Inputs->Poll(Model3->GetGameInfo(), xOffset, yOffset, xRes, yRes))
      quit = true;
    
#ifdef SUPERMODEL_DEBUGGER
    bool processUI = true;
    if (Debugger != NULL)
    {
      Debugger->Poll();

      // Check if debugger requests exit or pause
      if (Debugger->CheckExit())
      {
        quit = true;
        processUI = false;
      }
      else if (Debugger->CheckPause())  
      {
        paused = true;
        processUI = false;
      }
    }
    if (processUI)
    {
#endif // SUPERMODEL_DEBUGGER

    // Check UI controls
    if (Inputs->uiExit->Pressed())
    {
      // Quit emulator
      quit = true;      
    }
    else if (Inputs->uiReset->Pressed())
    {
      if (!paused)
      {
        Model3->PauseThreads();
        SetAudioEnabled(false);
      }

      // Reset emulator
      Model3->Reset();
      
#ifdef SUPERMODEL_DEBUGGER
      // If debugger was supplied, reset it too
      if (Debugger != NULL)
        Debugger->Reset();
#endif // SUPERMODEL_DEBUGGER

      if (!paused)
      {
        Model3->ResumeThreads();
        SetAudioEnabled(true);
      }

      puts("Model 3 reset.");
    }
    else if (Inputs->uiPause->Pressed())
    {
      // Toggle emulator paused flag
      paused = !paused;

      if (paused)
      {
        Model3->PauseThreads();
        SetAudioEnabled(false);
        sprintf(titleStr, "%s (Paused)", baseTitleStr);
        SDL_WM_SetCaption(titleStr,NULL);
      }
      else
      {
        Model3->ResumeThreads();
        SetAudioEnabled(true);
        SDL_WM_SetCaption(baseTitleStr,NULL);
      }
      
      // Send paused value as output
      if (Outputs != NULL)
        Outputs->SetValue(OutputPause, paused);
    }
    else if (Inputs->uiFullScreen->Pressed())
    {
      // Toggle emulator fullscreen
      g_Config.fullScreen = !g_Config.fullScreen;

      // Delete renderers and recreate them afterwards since GL context will most likely be lost when switching from/to fullscreen
      delete Render2D;
      delete Render3D;
      Render2D = NULL;
      Render3D = NULL;
      
      // Resize screen
      totalXRes = xRes = g_Config.xRes;
        totalYRes = yRes = g_Config.yRes;
      if (OKAY != ResizeGLScreen(&xOffset,&yOffset,&xRes,&yRes,&totalXRes,&totalYRes,true,g_Config.fullScreen))
        goto QuitError;

      // Recreate renderers and attach to the emulator
      Render2D = new CRender2D();
      Render3D = g_Config.new3DEngine ? ((IRender3D *) new New3D::CNew3D()) : ((IRender3D *) new Legacy3D::CLegacy3D());
      if (OKAY != Render2D->Init(xOffset, yOffset, xRes, yRes, totalXRes, totalYRes))
        goto QuitError;
      if (OKAY != Render3D->Init(xOffset, yOffset, xRes, yRes, totalXRes, totalYRes))
        goto QuitError;
      Model3->AttachRenderers(Render2D,Render3D);
    
      Inputs->GetInputSystem()->SetMouseVisibility(!g_Config.fullScreen); 
    }
    else if (Inputs->uiSaveState->Pressed())
    {
      if (!paused)
      {
        Model3->PauseThreads();
        SetAudioEnabled(false);
      }

      // Save game state
      SaveState(Model3);

      if (!paused)
      {
        Model3->ResumeThreads();
        SetAudioEnabled(true);
      }
    }
    else if (Inputs->uiChangeSlot->Pressed())
    {
      // Change save slot
      ++s_saveSlot;
      s_saveSlot %= 10; // clamp to [0,9]
      printf("Save slot: %d\n", s_saveSlot);
    }
    else if (Inputs->uiLoadState->Pressed())
    {
      if (!paused)
      {
        Model3->PauseThreads();
        SetAudioEnabled(false);
      }

      // Load game state
      LoadState(Model3);
            
#ifdef SUPERMODEL_DEBUGGER
      // If debugger was supplied, reset it after loading state
      if (Debugger != NULL)
        Debugger->Reset();
#endif // SUPERMODEL_DEBUGGER

      if (!paused)
      {
        Model3->ResumeThreads();
        SetAudioEnabled(true);
      }
    }
    else if (Inputs->uiMusicVolUp->Pressed())
    {
      // Increase music volume by 10%
      if (Model3->GetGameInfo()->mpegBoard)
      {
        int vol = (int) g_Config.GetMusicVolume() + 10;
        if (vol > 200)
          vol = 200;
        g_Config.SetMusicVolume(vol);
        printf("Music volume: %d%%", vol);
        if (200 == vol)
          puts(" (maximum)");
        else
          printf("\n");
      }
      else
        puts("This game does not have an MPEG music board.");
    }
    else if (Inputs->uiMusicVolDown->Pressed())
    {
      // Decrease music volume by 10%
      if (Model3->GetGameInfo()->mpegBoard)
      {
        int vol = (int) g_Config.GetMusicVolume() - 10;
        if (vol < 0)
          vol = 0;
        g_Config.SetMusicVolume(vol);
        printf("Music volume: %d%%", vol);
        if (0 == vol)
          puts(" (muted)");
        else
          printf("\n");
      } 
      else
        puts("This game does not have an MPEG music board.");
    }
    else if (Inputs->uiSoundVolUp->Pressed())
    {
      // Increase sound volume by 10%
      int vol = (int) g_Config.GetSoundVolume() + 10;
      if (vol > 200)
        vol = 200;
      g_Config.SetSoundVolume(vol);
      printf("Sound volume: %d%%", vol);
      if (200 == vol)
        puts(" (maximum)");
      else
        printf("\n");
    }
    else if (Inputs->uiSoundVolDown->Pressed())
    {
      // Decrease sound volume by 10%
      int vol = (int) g_Config.GetSoundVolume() - 10;
      if (vol < 0)
        vol = 0;
      g_Config.SetSoundVolume(vol);
      printf("Sound volume: %d%%", vol);
      if (0 == vol)
        puts(" (muted)");
      else
        printf("\n");
    }
    else if (Inputs->uiDumpInpState->Pressed())
    {
      // Dump input states
      Inputs->DumpState(Model3->GetGameInfo());
    }
    else if (Inputs->uiDumpTimings->Pressed())
    {
      dumpTimings = !dumpTimings;
    }
    else if (Inputs->uiSelectCrosshairs->Pressed() && gameHasLightguns)
    {
      g_Config.crosshairs++;
      switch (g_Config.crosshairs & 3)
      {
      case 0: puts("Crosshairs disabled.");             break;
      case 3: puts("Crosshairs enabled.");              break;
      case 1: puts("Showing Player 1 crosshair only."); break;
      case 2: puts("Showing Player 2 crosshair only."); break;
      }
    }
    else if (Inputs->uiClearNVRAM->Pressed())
    {
      // Clear NVRAM
      Model3->ClearNVRAM();
      puts("NVRAM cleared.");
    }
    else if (Inputs->uiToggleFrLimit->Pressed())
    {
      // Toggle frame limiting
      g_Config.throttle = !g_Config.throttle;
      printf("Frame limiting: %s\n", g_Config.throttle?"On":"Off");
    }
#ifdef SUPERMODEL_DEBUGGER
      else if (Debugger != NULL && Inputs->uiEnterDebugger->Pressed())
      {
        // Break execution and enter debugger
        Debugger->ForceBreak(true);
      }
    }
#endif // SUPERMODEL_DEBUGGER
    
    
    // Frame rate and limiting
    unsigned currentFPSTicks = SDL_GetTicks();
    unsigned currentTicks = currentFPSTicks;
    if (g_Config.showFPS)
    {
      ++fpsFramesElapsed;
      if((currentFPSTicks-prevFPSTicks) >= 1000)  // update FPS every 1 second (each tick is 1 ms)
      {
        sprintf(titleStr, "%s - %1.1f FPS%s", baseTitleStr, (float)fpsFramesElapsed/((float)(currentFPSTicks-prevFPSTicks)/1000.0f), paused ? " (Paused)" : "");
        SDL_WM_SetCaption(titleStr,NULL);
        prevFPSTicks = currentFPSTicks;     // reset tick count
        fpsFramesElapsed = 0;         // reset frame count
      }
    }
    
    if (paused || g_Config.throttle)
    {
        UINT32 endTime		= SDL_GetTicks();
        UINT32 diff			= endTime - startTime;
        UINT32 frameTime	= (UINT32)(1000 / 60.f);		// 60 fps, we could roll with 57.5? that would be a jerk fest on 60hz screens though

        if (diff < frameTime) {
            SuperSleep(frameTime - diff);
        }
    }

    if (dumpTimings && !paused)
    {
      CModel3 *M = dynamic_cast<CModel3 *>(Model3);
      if (M)
        M->DumpTimings();
    }
  }

  // Make sure all threads are paused before shutting down
  Model3->PauseThreads();   
  
#ifdef SUPERMODEL_DEBUGGER
  // If debugger was supplied, detach it from system and restore old logger
  if (Debugger != NULL)
  {
    Debugger->Detach();
    SetLogger(oldLogger);
  }
#endif // SUPERMODEL_DEBUGGER
  
  // Save NVRAM
  SaveNVRAM(Model3);
  
  // Close audio
  CloseAudio();

  // Shut down renderers
  delete Render2D;
  delete Render3D;

  return 0;

  // Quit with an error
QuitError:
  delete Render2D;
  delete Render3D;
  return 1;
}


/******************************************************************************
 CROM Disassembler
******************************************************************************/

// Disassemble instructions from CROM
static int DisassembleCROM(const char *zipFile, uint32_t addr, unsigned n)
{
  const struct GameInfo *Game;
  uint8_t *crom;
  struct ROMMap Map[] =
  {
    { "CROM",   NULL },
    { "CROMxx", NULL },
    { NULL,   NULL }
  };
  
  // Do we have a valid CROM address?
  if (addr < 0xFF800000)
    return ErrorLog("Valid CROM address range is FF800000-FFFFFFFF.");
    
  // Allocate memory and set ROM region
  crom = new(std::nothrow) uint8_t[0x8800000];
  if (NULL == crom)
    return ErrorLog("Insufficient memory to load CROM (need %d MB).", (0x8800000/8));
  Map[0].ptr = crom;
  Map[1].ptr = &crom[0x800000];
  
  // Load ROM set
  Game = LoadROMSetFromZIPFile(Map, g_Model3GameList, zipFile, false);
  if (NULL == Game)
    return ErrorLog("Failed to load ROM set."); 
    
  // Mirror CROM if necessary
  if (Game->cromSize < 0x800000)  // high part of fixed CROM region contains CROM0
    CopyRegion(crom, 0, 0x800000-0x200000, &crom[0x800000], 0x800000);
    
  // Disassemble!
  addr -= 0xFF800000;
  while ((n > 0) && ((addr+4) <= 0x800000))
  {
    uint32_t op = (crom[addr+0]<<24) | (crom[addr+1]<<16) | (crom[addr+2]<<8) | crom[addr+3];
        
    printf("%08X: ", addr+0xFF800000);
    char mnem[16];
    char oprs[48];
    if (DisassemblePowerPC(op, addr+0xFF800000, mnem, oprs, 1))
    {
      if (mnem[0] != '\0')    // invalid form
          printf("%08X %s*\t%s\n", op, mnem, oprs);
      else
          printf("%08X ?\n", op);
    }
    else
      printf("%08X %s\t%s\n", op, mnem, oprs);
    
    addr += 4;
    --n;
  }
  
  delete [] crom;
  return OKAY;
}


/******************************************************************************
 Entry Point and Command Line Procesing
******************************************************************************/

// Print Supermodel title and copyright information
static void Title(void)
{
  puts("Supermodel: A Sega Model 3 Arcade Emulator (Version " SUPERMODEL_VERSION ")");
  puts("Copyright 2011-2016 by Bart Trzynadlowski and Nik Henson\n");
}

// Print usage information
static void Help(void)
{
  puts("Usage: Supermodel <romset> [options]");
  puts("ROM set must be a valid ZIP file containing a single game.");
  puts("");
  puts("General Options:");
  puts("    -?, -h, -help, --help  Print this help text");
  puts("    -print-games           List supported games and quit");
  puts("");
  puts("Core Options:");
  printf("    -ppc-frequency=<freq>  PowerPC frequency in MHz [Default: %d]\n", g_Config.GetPowerPCFrequency());
  puts("    -no-threads            Disable multi-threading entirely");
  puts("    -gpu-multi-threaded    Run graphics rendering in separate thread [Default]");
  puts("    -no-gpu-thread         Run graphics rendering in main thread");
  puts("");
  puts("Video Options:");
  puts("    -res=<x>,<y>           Resolution [Default: 496,384]");
  puts("    -window                Windowed mode [Default]");
  puts("    -fullscreen            Full screen mode");
  puts("    -wide-screen           Expand 3D field of view to screen width");
  puts("    -multi-texture         Use 8 texture maps for decoding");
  puts("    -no-multi-texture      Decode to a single texture map [Default]");
  puts("    -no-throttle           Disable 60 Hz frame rate lock");
  puts("    -vsync                 Lock to vertical refresh rate [Default]");
  puts("    -no-vsync              Do not lock to vertical refresh rate");
  puts("    -show-fps              Display frame rate in window title bar");
  puts("    -crosshairs=<n>        Crosshairs configuration for gun games:");
  puts("                            0=none [Default], 1=P1 only, 2=P2 only, 3=P1 & P2");
  puts("    -legacy3d              Legacy 3D engine [Default]");
  puts("    -new3d                 New 3D engine by Ian Curtis");
  puts("    -vert-shader=<file>    Load vertex shader from file (legacy 3D engine)");
  puts("    -frag-shader=<file>    Load fragment shader from file (legacy 3D engine)");
  puts("    -print-gl-info         Print OpenGL driver information and quit");
  puts("");
  puts("Audio Options:");
  puts("    -sound-volume=<vol>    Volume of SCSP-generated sound in %, applies only");
  puts("                           when Digital Sound Board is present [Default: 100]");
  puts("    -music-volume=<vol>    Digital Sound Board volume in % [Default: 100]");
  puts("    -balance=<bal>         Relative front/rear balance in % [Default: 0]");
  puts("    -flip-stereo           Swap left and right audio channels");
  puts("    -no-sound              Disable sound board emulation (sound effects)");
  puts("    -no-dsb                Disable Digital Sound Board (MPEG music)");
  puts("");
  puts("Input Options:");
#ifdef SUPERMODEL_WIN32
  puts("    -force-feedback        Enable force feedback (DirectInput, XInput)");
#endif
  puts("    -config-inputs         Configure keyboards, mice, and game controllers");
#ifdef SUPERMODEL_WIN32
  printf("    -input-system=<s>      Input system [Default: %s]\n", g_Config.GetInputSystem());
  printf("    -outputs=<s>           Outputs [Default: %s]\n", g_Config.GetOutputs());
#endif
  puts("    -print-inputs          Prints current input configuration");
  puts("");
#ifdef SUPERMODEL_DEBUGGER
  puts("Debug Options:");
  puts("    -disable-debugger      Completely disable debugger functionality");
  puts("    -enter-debugger        Enter debugger at start of emulation");
  puts("    -dis=<addr>[,n]        Disassemble PowerPC code from CROM");
  puts("");
#endif // SUPERMODEL_DEBUGGER
}

// Print game list
static void PrintGameList(void)
{
  int i, j;
  
  puts("Supported games:");
  puts("");
  puts("    ROM Set         Title");
  puts("    -------         -----");
  for (i = 0; g_Model3GameList[i].title != NULL; i++)
  {
    printf("    %s", g_Model3GameList[i].id);
    for (j = strlen(g_Model3GameList[i].id); j < 9; j++)  // pad for alignment (no game ID is more than 9 letters)
      printf(" ");
    printf("       %s\n", g_Model3GameList[i].title);
  }
}

/*
 * main(argc, argv):
 *
 * Program entry point.
 */

int main(int argc, char **argv)
{
#ifdef SUPERMODEL_DEBUGGER
  bool      cmdEnterDebugger = false;
#endif // SUPERMODEL_DEBUGGER
  char      *inputSystem = NULL;  // use default input system
  char      *outputs = NULL;
  unsigned  num_instructions;
  uint32_t  addr;

  Title();
  if (argc <= 1)
  {
    Help();
    return 0;
  }

  // Create default logger
  CFileLogger Logger(DEBUG_LOG_FILE, ERROR_LOG_FILE);
  Logger.ClearLogs();
  SetLogger(&Logger);
  
  // Log the command line used to start Supermodel
  InfoLog("Started as:");
  for (int i = 0; i < argc; i++)
    InfoLog("\targv[%d] = %s", i, argv[i]);
  InfoLog("");
  
  // Read global settings from INI file
  ReadConfigFile("Global");

  /*
   * Parse command line. 
   *
   * Settings are stored in CmdLine so that they can be applied later, after
   * game-specific settings are read from the configuration file (which
   * requires the ROM set to be identified and therefore is done later).
   *
   * Some commands are processed here directly.
   */
  int fileIdx = 0;
  bool cmdPrintInputs = false;
  bool cmdConfigInputs = false;
  bool cmdDis = false;
  CINIFile CmdLine; // not associated with any files, only holds command line options
  CmdLine.SetDefaultSectionName("Global");  // command line settings are global-level
  for (int i = 1; i < argc; i++)
  {
    if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "-?") || !strcmp(argv[i], "-help") || !strcmp(argv[i], "--help"))
    {
      Help();
      return 0;
    }
    else if (!strcmp(argv[i], "-print-games"))
    {
      PrintGameList();
      return 0;
    }
    else if (!strncmp(argv[i], "-ppc-frequency", 14))
    {
      int f;
      int ret = sscanf(&argv[i][14], "=%d",  &f);
      if (ret != 1)
        ErrorLog("'-ppc-frequency' requires a frequency.");
      else
        CmdLine.Set("Global", "PowerPCFrequency", f);
    }
    else if (!strcmp(argv[i], "-no-threads"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "MultiThreaded", n);
    }
    else if (!strcmp(argv[i], "-gpu-multi-threaded"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "GPUMultiThreaded", n);
    }
    else if (!strcmp(argv[i], "-no-gpu-thread"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "GPUMultiThreaded", n);
    }
#ifdef SUPERMODEL_DEBUGGER
    else if (!strcmp(argv[i], "-disable-debugger"))
      g_Config.disableDebugger = true;
    else if (!strcmp(argv[i], "-enter-debugger"))
      cmdEnterDebugger = true;
#endif // SUPERMODEL_DEBUGGER
    else if (!strncmp(argv[i], "-sound-volume", 13))
    {
      unsigned n;
      int ret = sscanf(&argv[i][13],"=%d", &n);
      if (ret != 1)
        ErrorLog("'-sound-volume' requires a volume setting.");
      else
        CmdLine.Set("Global", "SoundVolume", n);
    }
    else if (!strncmp(argv[i], "-music-volume", 13))
    {
      unsigned n;
      int ret = sscanf(&argv[i][13],"=%d", &n);
      if (ret != 1)
        ErrorLog("'-music-volume' requires a volume setting.");
      else
        CmdLine.Set("Global", "MusicVolume", n);
    }
    else if (!strncmp(argv[i], "-balance", 8))
    {
      unsigned n;
      int ret = sscanf(&argv[i][8], "=%d", &n);
      if (ret != 1)
        ErrorLog("'-balance' requires a front/rear balance setting.");
      else
        CmdLine.Set("Global", "Balance", n);
    }
    else if (!strcmp(argv[i], "-flip-stereo"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "FlipStereo", n);
    }
    else if (!strcmp(argv[i], "-no-sound"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "EmulateSound", n);
    }
    else if (!strcmp(argv[i], "-no-dsb"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "EmulateDSB", n);
    }
#ifdef SUPERMODEL_WIN32
    else if (!strcmp(argv[i], "-force-feedback"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "ForceFeedback", n);
    }
#endif
    else if (!strncmp(argv[i], "-res", 4))
    {
      unsigned  x, y;
      
      int ret = sscanf(&argv[i][4],"=%d,%d", &x, &y);
      if (ret != 2)
      {
        ret = sscanf(&argv[i][4],"=%dx%d", &x, &y);
        if (ret != 2)
          ErrorLog("'-res' requires both a width and a height.");
      }
      if (ret == 2)
      {
        CmdLine.Set("Global", "XResolution", x);
        CmdLine.Set("Global", "YResolution", y);
      }
    }
    else if (!strcmp(argv[i], "-window"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "FullScreen", n);
    }
    else if (!strcmp(argv[i], "-fullscreen"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "FullScreen", n);
    }
    else if (!strcmp(argv[i], "-wide-screen"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "WideScreen", n);
    }
    else if (!strcmp(argv[i], "-multi-texture"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "MultiTexture", n);
    }
    else if (!strcmp(argv[i], "-no-multi-texture"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "MultiTexture", n);
    }
    else if (!strcmp(argv[i], "-vsync"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "VSync", n);
    }
    else if (!strcmp(argv[i], "-no-vsync"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "VSync", n);
    }
    else if (!strcmp(argv[i], "-no-throttle"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "Throttle", n);
    }
    else if (!strcmp(argv[i], "-show-fps"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "ShowFrameRate", n);
    }
    else if (!strncmp(argv[i], "-crosshairs", 11))
    {
      unsigned  x;
      int ret = sscanf(&argv[i][11],"=%d", &x);
      if (ret != 1 || x > 3)
        ErrorLog("'-crosshairs' requires a number 0-3");
      else
        CmdLine.Set("Global", "Crosshairs", x);
    }
    else if (!strcmp(argv[i], "-new3d"))
    {
      unsigned n = 1;
      CmdLine.Set("Global", "New3DEngine", n);
    }
    else if (!strcmp(argv[i], "-legacy3d"))
    {
      unsigned n = 0;
      CmdLine.Set("Global", "New3DEngine", n);
    }
    else if (!strncmp(argv[i], "-vert-shader", 12))
    {
      if (argv[i][12] == '\0')
        ErrorLog("'-vert-shader' requires a file path.");
      else if (argv[i][12] != '=')
        ErrorLog("Ignoring unrecognized option: %s", argv[i]);
      else if (argv[i][13] == '\0')
        ErrorLog("'-vert-shader' requires a file path.");
      else
        CmdLine.Set("Global", "VertexShader", &argv[i][13]);
    }
    else if (!strncmp(argv[i], "-frag-shader", 12))
    {
      if (argv[i][12] == '\0')
        ErrorLog("'-frag-shader' requires a file path.");
      else if (argv[i][12] != '=')
        ErrorLog("Ignoring unrecognized option: %s", argv[i]);
      else if (argv[i][13] == '\0')
        ErrorLog("'-frag-shader' requires a file path.");
      else
        CmdLine.Set("Global", "FragmentShader", &argv[i][13]);
    }
#ifdef SUPERMODEL_WIN32
    else if (!strncmp(argv[i], "-input-system", 13)) // this setting is not written to the config file!
    {
      if (argv[i][13] == '\0')
        ErrorLog("'-input-system' requires an input system name.");
      else if (argv[i][13] != '=')
        ErrorLog("Ignoring unrecognized option: %s", argv[i]);
      else if (argv[i][14] == '\0')
        ErrorLog("'-input-system' requires an input system name.");
      else
        inputSystem = &argv[i][14];
    }
    else if (!strncmp(argv[i], "-outputs", 8)) // this setting is not written to the config file!
    {
      if (argv[i][8] == '\0')
        ErrorLog("'-outputs' requires an outputs name.");
      else if (argv[i][8] != '=')
        ErrorLog("Ignoring unrecognized option: %s", argv[i]);
      else if (argv[i][9] == '\0')
        ErrorLog("'-outputs' requires an outputs name.");
      else
        outputs = &argv[i][9];
    }
#endif  // SUPERMODEL_WIN32
    else if (!strcmp(argv[i], "-print-inputs"))
      cmdPrintInputs = true;
    else if (!strcmp(argv[i], "-config-inputs"))
      cmdConfigInputs = true;
    else if (!strncmp(argv[i], "-dis", 4))
    {
      int ret = sscanf(&argv[i][4],"=%X,%X", &addr, &num_instructions);
      if (ret == 1)
      {
        num_instructions = 16;
        cmdDis = true;
      }
      else if (ret == 2)
        cmdDis = true;
      else
        ErrorLog("'-dis' requires address and, optionally, number of instructions.");
    }
    else if (!strcmp(argv[i], "-print-gl-info"))
    {
      PrintGLInfo(true, false, false);
      return 0;
    }
#ifdef DEBUG
    else if (!strncmp(argv[i], "-gfx-state", 10))
    {
      if (argv[i][10] == '\0')
        ErrorLog("'-gfx-state' requires a file path.");
      else if (argv[i][10] != '=')
        ErrorLog("Ignoring unrecognized option: %s", argv[i]);
      else if (argv[i][10] == '\0')
        ErrorLog("'-gfx-state' requires a file path.");
      else
        s_gfxStatePath.assign(&argv[i][11]);
    }
#endif
    else if (argv[i][0] == '-')
      ErrorLog("Ignoring unrecognized option: %s", argv[i]);
    else
    {
      if (fileIdx)    // already specified a file
        ErrorLog("Multiple files specified. Using '%s', ignoring '%s'.", argv[fileIdx], argv[i]);
      else
        fileIdx = i;
    }
  }
  
  // Initialize SDL (individual subsystems get initialized later)
  if (SDL_Init(0) != 0)
  {
    ErrorLog("Unable to initialize SDL: %s\n", SDL_GetError());
    return 1;
  }
  
  // Create Model 3 emulator
#ifdef DEBUG
  IEmulator *Model3 = s_gfxStatePath.empty() ? static_cast<IEmulator *>(new CModel3()) : static_cast<IEmulator *>(new CModel3GraphicsState(s_gfxStatePath));
#else
  IEmulator *Model3 = new CModel3();
#endif
  
  // Create input system (default is SDL) and debugger
  CInputSystem *InputSystem = NULL;
  CInputs *Inputs = NULL;
  COutputs *Outputs = NULL;
  int exitCode = 0;
#ifdef SUPERMODEL_DEBUGGER
  Debugger::CSupermodelDebugger *Debugger = NULL;
#endif // SUPERMODEL_DEBUGGER

  // Create input system
  g_Config.SetInputSystem(inputSystem);
  if (stricmp(g_Config.GetInputSystem(), "sdl") == 0)
    InputSystem = new CSDLInputSystem();
#ifdef SUPERMODEL_WIN32
  else if (stricmp(g_Config.GetInputSystem(), "dinput") == 0)
    InputSystem = new CDirectInputSystem(false, false);
  else if (stricmp(g_Config.GetInputSystem(), "xinput") == 0)
    InputSystem = new CDirectInputSystem(false, true);
  else if (stricmp(g_Config.GetInputSystem(), "rawinput") == 0)
    InputSystem = new CDirectInputSystem(true, false);
#endif // SUPERMODEL_WIN32
  else
  {
    ErrorLog("Unknown input system: %s\n", g_Config.GetInputSystem());
    exitCode = 1;
    goto Exit;
  }

  // Create inputs from input system (configuring them if required)
  Inputs = new CInputs(InputSystem);
  if (!Inputs->Initialize())
  {
    ErrorLog("Unable to initalize inputs.\n");
    exitCode = 1;
    goto Exit;
  }
  
  if (ConfigureInputs(Inputs, cmdConfigInputs))
  {
    exitCode = 1;
    goto Exit;
  }

  if (cmdPrintInputs)
  {
    Inputs->PrintInputs(NULL);
    InputSystem->PrintSettings();
  }

  // Create outputs 
#ifdef SUPERMODEL_WIN32
  g_Config.SetOutputs(outputs);
  if (stricmp(g_Config.GetOutputs(), "none") == 0)
    Outputs = NULL;
  else if (stricmp(g_Config.GetOutputs(), "win") == 0)
    Outputs = new CWinOutputs();
  else
  {
    ErrorLog("Unknown outputs: %s\n", g_Config.GetOutputs());
    exitCode = 1;
    goto Exit;
  }
#endif // SUPERMODEL_WIN32

  // Initialize outputs
  if (Outputs != NULL && !Outputs->Initialize())
  {
    ErrorLog("Unable to initialize outputs.\n");
    exitCode = 1;
    goto Exit;
  }
  
  // From this point onwards, a ROM set is needed
  if (fileIdx == 0)
  {
    ErrorLog("No ROM set specified.");
    exitCode = 1;
    goto Exit;
  }
  
  if (cmdDis)
  {
    if (OKAY != DisassembleCROM(argv[fileIdx], addr, num_instructions))
      exitCode = 1;
    goto Exit;
  }

#ifdef SUPERMODEL_DEBUGGER
  // Create Supermodel debugger unless debugging is disabled
  if (!g_Config.disableDebugger)
  {
    Debugger = new Debugger::CSupermodelDebugger(dynamic_cast<CModel3 *>(Model3), Inputs, &Logger);
    // If -enter-debugger option was set force debugger to break straightaway
    if (cmdEnterDebugger)
      Debugger->ForceBreak(true);
  }
  // Fire up Supermodel with debugger
  exitCode = Supermodel(argv[fileIdx], Model3, Inputs, Outputs, Debugger, &CmdLine);
  if (Debugger != NULL)
    delete Debugger;
#else
  // Fire up Supermodel
  exitCode = Supermodel(argv[fileIdx], Model3, Inputs, Outputs, &CmdLine);
#endif // SUPERMODEL_DEBUGGER
  delete Model3;

Exit:
  if (Inputs != NULL)
    delete Inputs;
  if (InputSystem != NULL)
    delete InputSystem;
  if (Outputs != NULL)
    delete Outputs;
  SDL_Quit();
  
  if (exitCode)
    InfoLog("Program terminated due to an error.");
  else
    InfoLog("Program terminated normally.");
    
  return exitCode;
}