esp32-doom/components/prboom-esp32-compat/i_video.c

/* Emacs style mode select   -*- C++ -*-
 *-----------------------------------------------------------------------------
 *
 *
 *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
 *  based on BOOM, a modified and improved DOOM engine
 *  Copyright (C) 1999 by
 *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
 *  Copyright (C) 1999-2006 by
 *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
 *  Copyright 2005, 2006 by
 *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
 *
 *  This program 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 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 *  02111-1307, USA.
 *
 * DESCRIPTION:
 *  DOOM graphics stuff for SDL
 *
 *-----------------------------------------------------------------------------
 */

#include "config.h"
#include <stdlib.h>
#include <unistd.h>
#include "m_argv.h"
#include "doomstat.h"
#include "doomdef.h"
#include "doomtype.h"
#include "v_video.h"
#include "r_draw.h"
#include "d_main.h"
#include "d_event.h"
#include "i_joy.h"
#include "i_video.h"
#include "z_zone.h"
#include "s_sound.h"
#include "sounds.h"
#include "w_wad.h"
#include "st_stuff.h"
#include "lprintf.h"

int use_fullscreen=0;
int use_doublebuffer=0;


void I_StartTic (void)
{
}

void I_StartFrame (void)
{
}

static void I_InitInputs(void)
{
}


static void I_UploadNewPalette(int pal)
{
#if 0
  // This is used to replace the current 256 colour cmap with a new one
  // Used by 256 colour PseudoColor modes

  // Array of SDL_Color structs used for setting the 256-colour palette
  static SDL_Color* colours;
  static int cachedgamma;
  static size_t num_pals;

  if (V_GetMode() == VID_MODEGL)
    return;

  if ((colours == NULL) || (cachedgamma != usegamma)) {
    int pplump = W_GetNumForName("PLAYPAL");
    int gtlump = (W_CheckNumForName)("GAMMATBL",ns_prboom);
    register const byte * palette = W_CacheLumpNum(pplump);
    register const byte * const gtable = (const byte *)W_CacheLumpNum(gtlump) + 256*(cachedgamma = usegamma);
    register int i;

    num_pals = W_LumpLength(pplump) / (3*256);
    num_pals *= 256;

    if (!colours) {
      // First call - allocate and prepare colour array
      colours = malloc(sizeof(*colours)*num_pals);
    }

    // set the colormap entries
    for (i=0 ; (size_t)i<num_pals ; i++) {
      colours[i].r = gtable[palette[0]];
      colours[i].g = gtable[palette[1]];
      colours[i].b = gtable[palette[2]];
      palette += 3;
    }

    W_UnlockLumpNum(pplump);
    W_UnlockLumpNum(gtlump);
    num_pals/=256;
  }

#endif
}

//////////////////////////////////////////////////////////////////////////////
// Graphics API

void I_ShutdownGraphics(void)
{
}

//
// I_UpdateNoBlit
//
void I_UpdateNoBlit (void)
{
}

//
// I_FinishUpdate
//
static int newpal = 0;

void I_FinishUpdate (void)
{
#if 0
  if (SDL_MUSTLOCK(screen)) {
      int h;
      byte *src;
      byte *dest;

      if (SDL_LockSurface(screen) < 0) {
        lprintf(LO_INFO,"I_FinishUpdate: %s\n", SDL_GetError());
        return;
      }
      dest=screen->pixels;
      src=screens[0].data;
      h=screen->h;
      for (; h>0; h--)
      {
        memcpy(dest,src,SCREENWIDTH*V_GetPixelDepth());
        dest+=screen->pitch;
        src+=screens[0].byte_pitch;
      }
      SDL_UnlockSurface(screen);
  }
  /* Update the display buffer (flipping video pages if supported)
   * If we need to change palette, that implicitely does a flip */
  if (newpal != NO_PALETTE_CHANGE) {
    I_UploadNewPalette(newpal);
    newpal = NO_PALETTE_CHANGE;
  }
  SDL_Flip(screen);
#endif
}

void I_SetPalette (int pal)
{
  newpal = pal;
}

void I_PreInitGraphics(void)
{
}


// CPhipps -
// I_SetRes
// Sets the screen resolution
void I_SetRes(void)
{
  int i;

  I_CalculateRes(SCREENWIDTH, SCREENHEIGHT);

  // set first three to standard values
  for (i=0; i<3; i++) {
    screens[i].width = SCREENWIDTH;
    screens[i].height = SCREENHEIGHT;
    screens[i].byte_pitch = SCREENPITCH;
    screens[i].short_pitch = SCREENPITCH / V_GetModePixelDepth(VID_MODE16);
    screens[i].int_pitch = SCREENPITCH / V_GetModePixelDepth(VID_MODE32);
  }

  // statusbar
  screens[4].width = SCREENWIDTH;
  screens[4].height = (ST_SCALED_HEIGHT+1);
  screens[4].byte_pitch = SCREENPITCH;
  screens[4].short_pitch = SCREENPITCH / V_GetModePixelDepth(VID_MODE16);
  screens[4].int_pitch = SCREENPITCH / V_GetModePixelDepth(VID_MODE32);

  lprintf(LO_INFO,"I_SetRes: Using resolution %dx%d\n", SCREENWIDTH, SCREENHEIGHT);
}

void I_InitGraphics(void)
{
  char titlebuffer[2048];
  static int    firsttime=1;

  if (firsttime)
  {
    firsttime = 0;

    atexit(I_ShutdownGraphics);
    lprintf(LO_INFO, "I_InitGraphics: %dx%d\n", SCREENWIDTH, SCREENHEIGHT);

    /* Set the video mode */
    I_UpdateVideoMode();

    /* Initialize the input system */
    I_InitInputs();
  }
}


void I_UpdateVideoMode(void)
{
  int init_flags;
  int i;
  video_mode_t mode;

  lprintf(LO_INFO, "I_UpdateVideoMode: %dx%d (%s)\n", SCREENWIDTH, SCREENHEIGHT, desired_fullscreen ? "fullscreen" : "nofullscreen");

    mode = VID_MODE16;
//    mode = VID_MODE8;

  V_InitMode(mode);
  V_DestroyUnusedTrueColorPalettes();
  V_FreeScreens();

  I_SetRes();

  V_AllocScreens();

  R_InitBuffer(SCREENWIDTH, SCREENHEIGHT);

}