git.mutantstargoat.com Git - eradicate/blob - src/sdl/main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <math.h>
   4 #include <limits.h>
   5 #include <SDL/SDL.h>
   6 #include "game.h"
   7 #include "timer.h"
   8
   9 #define FB_WIDTH        640
  10 #define FB_HEIGHT       480
  11
  12 static void handle_event(SDL_Event *ev);
  13 static void toggle_fullscreen(void);
  14
  15 static int sdlkey_to_gamekey(int sdlkey, unsigned int mod);
  16
  17
  18 static int quit;
  19 static SDL_Surface *fbsurf;
  20
  21 static int fbscale = 1;
  22 static int xsz, ysz;
  23 static unsigned int sdl_flags = SDL_SWSURFACE;
  24
  25
  26 int main(int argc, char **argv)
  27 {
  28         int s;
  29         char *env;
  30         void *fb_buf;
  31
  32         if((env = getenv("FBSCALE")) && (s = atoi(env))) {
  33                 fbscale = s;
  34                 printf("Framebuffer scaling x%d\n", fbscale);
  35         }
  36
  37         xsz = FB_WIDTH * fbscale;
  38         ysz = FB_HEIGHT * fbscale;
  39         fb_width = xsz;
  40         fb_height = ysz;
  41
  42         fb_size = FB_WIDTH * FB_HEIGHT * FB_BPP / 8;
  43         if(!(fb_buf = malloc(fb_size + FB_WIDTH * 4))) {
  44                 fprintf(stderr, "failed to allocate virtual framebuffer\n");
  45                 return 1;
  46         }
  47         fb_pixels = (char*)fb_buf + FB_WIDTH * 2;
  48
  49         SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_NOPARACHUTE);
  50         if(!(fbsurf = SDL_SetVideoMode(xsz, ysz, FB_BPP, sdl_flags))) {
  51                 fprintf(stderr, "failed to set video mode %dx%d %dbpp\n", FB_WIDTH, FB_HEIGHT, FB_BPP);
  52                 free(fb_pixels);
  53                 SDL_Quit();
  54                 return 1;
  55         }
  56         SDL_WM_SetCaption("eradicate/SDL", 0);
  57         SDL_ShowCursor(0);
  58
  59         time_msec = 0;
  60         if(init(argc, argv) == -1) {
  61                 free(fb_pixels);
  62                 SDL_Quit();
  63                 return 1;
  64         }
  65
  66         reset_timer();
  67
  68         while(!quit) {
  69                 SDL_Event ev;
  70                 while(SDL_PollEvent(&ev)) {
  71                         handle_event(&ev);
  72                         if(quit) goto break_evloop;
  73                 }
  74
  75                 time_msec = get_msec();
  76                 draw();
  77         }
  78
  79 break_evloop:
  80         cleanup();
  81         SDL_Quit();
  82         return 0;
  83 }
  84
  85 void game_quit(void)
  86 {
  87         quit = 1;
  88 }
  89
  90 void wait_vsync(void)
  91 {
  92         unsigned long start = SDL_GetTicks();
  93         unsigned long until = (start | 0xf) + 1;
  94         while(SDL_GetTicks() <= until);
  95 }
  96
  97 void blit_frame(void *pixels, int vsync)
  98 {
  99         int i, j;
 100         unsigned short *sptr, *dptr;
 101
 102         if(vsync) {
 103                 wait_vsync();
 104         }
 105
 106         if(SDL_MUSTLOCK(fbsurf)) {
 107                 SDL_LockSurface(fbsurf);
 108         }
 109
 110         sptr = pixels;
 111         dptr = (unsigned short*)fbsurf->pixels + (fbsurf->w - xsz) / 2;
 112         for(i=0; i<FB_HEIGHT; i++) {
 113                 for(j=0; j<FB_WIDTH; j++) {
 114                         int x, y;
 115                         unsigned short pixel = *sptr++;
 116
 117                         for(y=0; y<fbscale; y++) {
 118                                 for(x=0; x<fbscale; x++) {
 119                                         dptr[y * fbsurf->w + x] = pixel;
 120                                 }
 121                         }
 122                         dptr += fbscale;
 123                 }
 124                 dptr += (fbsurf->w - FB_WIDTH) * fbscale;
 125         }
 126
 127         if(SDL_MUSTLOCK(fbsurf)) {
 128                 SDL_UnlockSurface(fbsurf);
 129         }
 130         SDL_Flip(fbsurf);
 131 }
 132
 133 /*
 134 static int bnmask(int sdlbn)
 135 {
 136         switch(sdlbn) {
 137         case SDL_BUTTON_LEFT:
 138                 return MOUSE_BN_LEFT;
 139         case SDL_BUTTON_RIGHT:
 140                 return MOUSE_BN_RIGHT;
 141         case SDL_BUTTON_MIDDLE:
 142                 return MOUSE_BN_MIDDLE;
 143         default:
 144                 break;
 145         }
 146         return 0;
 147 }
 148 */
 149
 150 static void handle_event(SDL_Event *ev)
 151 {
 152         int key;
 153
 154         switch(ev->type) {
 155         case SDL_QUIT:
 156                 quit = 1;
 157                 break;
 158
 159         case SDL_KEYDOWN:
 160         case SDL_KEYUP:
 161                 if(ev->key.keysym.sym == SDLK_RETURN && (SDL_GetModState() & KMOD_ALT) &&
 162                                 ev->key.state == SDL_PRESSED) {
 163                         toggle_fullscreen();
 164                         break;
 165                 }
 166                 if(key_event) {
 167                         key = sdlkey_to_gamekey(ev->key.keysym.sym, ev->key.keysym.mod);
 168                         key_event(key, ev->key.state == SDL_PRESSED ? 1 : 0);
 169                 } else {
 170                         if(ev->key.keysym.sym == SDLK_ESCAPE) {
 171                                 quit = 1;
 172                         }
 173                 }
 174                 break;
 175
 176                 /*
 177         case SDL_MOUSEMOTION:
 178                 mouse_x = ev->motion.x / fbscale;
 179                 mouse_y = ev->motion.y / fbscale;
 180                 break;
 181
 182         case SDL_MOUSEBUTTONDOWN:
 183                 mouse_bmask |= bnmask(ev->button.button);
 184                 if(0) {
 185         case SDL_MOUSEBUTTONUP:
 186                         mouse_bmask &= ~bnmask(ev->button.button);
 187                 }
 188                 mouse_x = ev->button.x / fbscale;
 189                 mouse_y = ev->button.y / fbscale;
 190                 break;
 191                 */
 192
 193         default:
 194                 break;
 195         }
 196 }
 197
 198 static void toggle_fullscreen(void)
 199 {
 200         SDL_Surface *newsurf;
 201         unsigned int newflags = sdl_flags ^ SDL_FULLSCREEN;
 202
 203         if(!(newsurf = SDL_SetVideoMode(xsz, ysz, FB_BPP, newflags))) {
 204                 fprintf(stderr, "failed to go %s\n", newflags & SDL_FULLSCREEN ? "fullscreen" : "windowed");
 205                 return;
 206         }
 207
 208         fbsurf = newsurf;
 209         sdl_flags = newflags;
 210 }
 211
 212 #define SSORG   '\''
 213 #define SSEND   '`'
 214 static char symshift[] = {
 215         '"', 0, 0, 0, 0, '<', '_', '>', '?',
 216         ')', '!', '@', '#', '$', '%', '^', '&', '*', '(',
 217         0, ':', 0, '+', 0, 0, 0,
 218         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 219         '{', '|', '}', 0, 0, '~'
 220 };
 221
 222
 223 static int sdlkey_to_gamekey(int sdlkey, unsigned int mod)
 224 {
 225         if(sdlkey < 128) {
 226                 if(mod & (KMOD_SHIFT)) {
 227                         if(sdlkey >= 'a' && sdlkey <= 'z') {
 228                                 sdlkey = toupper(sdlkey);
 229                         } else if(sdlkey >= SSORG && sdlkey <= SSEND) {
 230                                 sdlkey = symshift[sdlkey - SSORG];
 231                         }
 232                 }
 233                 return sdlkey;
 234         }
 235         if(sdlkey < 256) return 0;
 236         return sdlkey - 128;
 237 }