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