main_ncurses.c

   1 /**
   2   @file main_ncurses.c
   3
   4   This is ncurses (terminal) implementation of the game front end. This isn't
   5   a full fledged version but rather a "show off" of what can be done with the
   6   game; especially the limited ability of ncurses to handle input makes this
   7   version very hard to play.
   8
   9   by Miloslav Ciz (drummyfish), 2024
  10
  11   Released under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/)
  12   plus a waiver of all other intellectual property. The goal of this work is to
  13   be and remain completely in the public domain forever, available for any use
  14   whatsoever.
  15 */
  16
  17 #include <ncurses.h>
  18 #include <stdio.h>
  19 #include <time.h>
  20 #include <unistd.h>
  21
  22 #define SFG_SCREEN_RESOLUTION_X 120
  23 #define SFG_SCREEN_RESOLUTION_Y 40
  24 #define SFG_FPS 30
  25
  26 #include "game.h"
  27
  28 uint8_t ncScreen[SFG_SCREEN_RESOLUTION_X * SFG_SCREEN_RESOLUTION_Y];
  29 uint8_t ncButtonStates[SFG_KEY_COUNT];
  30 uint32_t timeStart;
  31
  32 const char asciiPalette[] =
  33 #if 1
  34   " .',:;lcoxkXK0MW";
  35 #else
  36   " -.,;!/clfsxaVO#";
  37 #endif
  38
  39 uint32_t currentTime()
  40 {
  41   struct timespec t;
  42   timespec_get(&t,TIME_UTC);
  43   return 1000 * ((int64_t) t.tv_sec) + ((int64_t) t.tv_nsec) / 1000000;
  44 }
  45
  46 int8_t SFG_keyPressed(uint8_t key)
  47 {
  48   return ncButtonStates[key];
  49 }
  50
  51 void SFG_getMouseOffset(int16_t *x, int16_t *y)
  52 {
  53   return;
  54 }
  55
  56 uint32_t SFG_getTimeMs()
  57 {
  58   return currentTime() - timeStart;
  59 }
  60
  61 void SFG_sleepMs(uint16_t timeMs)
  62 {
  63   usleep(1000 * timeMs);
  64 }
  65
  66 void SFG_setPixel(uint16_t x, uint16_t y, uint8_t colorIndex)
  67 {
  68   ncScreen[y * SFG_SCREEN_RESOLUTION_X + x] = asciiPalette[colorIndex % 16];
  69 }
  70
  71 void SFG_playSound(uint8_t soundIndex, uint8_t volume)
  72 {
  73 }
  74
  75 void SFG_setMusic(uint8_t value)
  76 {
  77 }
  78
  79 void SFG_processEvent(uint8_t event, uint8_t data)
  80 {
  81 }
  82
  83 void SFG_save(uint8_t data[SFG_SAVE_SIZE])
  84 {
  85 }
  86
  87 uint8_t SFG_load(uint8_t data[SFG_SAVE_SIZE])
  88 {
  89   return 0;
  90 }
  91
  92 int main(void)
  93 {
  94   timeStart = currentTime();
  95
  96   initscr();
  97   halfdelay(1);
  98   keypad(stdscr,TRUE);
  99   noecho();
 100   curs_set(0);
 101
 102   SFG_init();
 103
 104   int goOn = 1;
 105
 106   while (goOn)
 107   {
 108     erase();
 109     move(0,0);
 110
 111     const uint8_t *scr = ncScreen;
 112
 113     for (int y = 0; y < SFG_SCREEN_RESOLUTION_Y; ++y)
 114     {
 115       move(y,0);
 116
 117       for (int x = 0; x < SFG_SCREEN_RESOLUTION_X; ++x)
 118       {
 119         addch(*scr);
 120         scr++;
 121       }
 122     }
 123
 124     refresh();
 125
 126     goOn = SFG_mainLoopBody();
 127
 128     for (int i = 0; i < SFG_KEY_COUNT; ++i)
 129       ncButtonStates[i] = 0;
 130
 131     while (1)
 132     {
 133       int c = getch();
 134
 135       if (c == ERR)
 136         break;
 137
 138       switch (c)
 139       {
 140         case KEY_UP:      ncButtonStates[SFG_KEY_UP] = 1; break;
 141         case KEY_LEFT:    ncButtonStates[SFG_KEY_LEFT] = 1; break;
 142         case KEY_RIGHT:   ncButtonStates[SFG_KEY_RIGHT] = 1; break;
 143         case KEY_DOWN:    ncButtonStates[SFG_KEY_DOWN] = 1; break;
 144         case 'a':
 145         case KEY_ENTER:   ncButtonStates[SFG_KEY_A] = 1; break;
 146         case KEY_CANCEL:
 147         case KEY_CLOSE:
 148         case 's':         ncButtonStates[SFG_KEY_B] = 1; break;
 149         case 'd':         ncButtonStates[SFG_KEY_C] = 1; break;
 150         case ' ':         ncButtonStates[SFG_KEY_JUMP] = 1; break;
 151         case 'q':         ncButtonStates[SFG_KEY_MENU] = 1; break;
 152         case 'f':         ncButtonStates[SFG_KEY_NEXT_WEAPON] = 1; break;
 153         case 'g':         ncButtonStates[SFG_KEY_PREVIOUS_WEAPON] = 1; break;
 154         case 'n':         ncButtonStates[SFG_KEY_STRAFE_LEFT] = 1; break;
 155         case 'm':         ncButtonStates[SFG_KEY_STRAFE_RIGHT] = 1; break;
 156         default: break;
 157       }
 158     }
 159   }
 160
 161   endwin();
 162
 163   return 0;
 164 }