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

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <limits.h>
   4 #include <SDL/SDL.h>
   5 #include "demo.h"
   6
   7 static void handle_event(SDL_Event *ev);
   8
   9 static int quit;
  10 static long start_time;
  11 static SDL_Surface *fbsurf;
  12
  13 static int fbscale = 2;
  14 static int xsz, ysz;
  15
  16 int main(int argc, char **argv)
  17 {
  18         int s, i, j;
  19         char *env;
  20         unsigned short *sptr, *dptr;
  21         unsigned int sdl_flags = SDL_SWSURFACE;
  22
  23         if((env = getenv("FBSCALE")) && (s = atoi(env))) {
  24                 fbscale = s;
  25                 printf("Framebuffer scaling x%d\n", fbscale);
  26         }
  27
  28         xsz = fb_width * fbscale;
  29         ysz = fb_height * fbscale;
  30
  31         if(!(fb_pixels = malloc(fb_width * fb_height * fb_bpp / CHAR_BIT))) {
  32                 fprintf(stderr, "failed to allocate virtual framebuffer\n");
  33                 return 1;
  34         }
  35
  36         SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
  37         if(!(fbsurf = SDL_SetVideoMode(xsz, ysz, fb_bpp, sdl_flags))) {
  38                 fprintf(stderr, "failed to set video mode %dx%d %dbpp\n", fb_width, fb_height, fb_bpp);
  39                 free(fb_pixels);
  40                 SDL_Quit();
  41                 return 1;
  42         }
  43         SDL_WM_SetCaption("dosdemo/SDL", 0);
  44
  45         time_msec = 0;
  46         if(demo_init(argc, argv) == -1) {
  47                 free(fb_pixels);
  48                 SDL_Quit();
  49                 return 1;
  50         }
  51         start_time = SDL_GetTicks();
  52
  53         while(!quit) {
  54                 SDL_Event ev;
  55                 while(SDL_PollEvent(&ev)) {
  56                         handle_event(&ev);
  57                         if(quit) goto break_evloop;
  58                 }
  59
  60                 time_msec = SDL_GetTicks() - start_time;
  61                 demo_draw();
  62
  63                 if(SDL_MUSTLOCK(fbsurf)) {
  64                         SDL_LockSurface(fbsurf);
  65                 }
  66
  67                 sptr = fb_pixels;
  68                 dptr = fbsurf->pixels;
  69                 for(i=0; i<fb_height; i++) {
  70                         for(j=0; j<fb_width; j++) {
  71                                 int x, y;
  72                                 unsigned short pixel = *sptr++;
  73
  74                                 for(y=0; y<fbscale; y++) {
  75                                         for(x=0; x<fbscale; x++) {
  76                                                 dptr[y * xsz + x] = pixel;
  77                                         }
  78                                 }
  79                                 dptr += fbscale;
  80                         }
  81                         dptr += xsz * (fbscale - 1);
  82                 }
  83
  84                 if(SDL_MUSTLOCK(fbsurf)) {
  85                         SDL_UnlockSurface(fbsurf);
  86                 }
  87                 SDL_Flip(fbsurf);
  88         }
  89
  90 break_evloop:
  91         demo_cleanup();
  92         SDL_Quit();
  93         return 0;
  94 }
  95
  96 void demo_quit(void)
  97 {
  98         quit = 1;
  99 }
 100
 101 static void handle_event(SDL_Event *ev)
 102 {
 103         switch(ev->type) {
 104         case SDL_QUIT:
 105                 quit = 1;
 106                 break;
 107
 108         case SDL_KEYDOWN:
 109         case SDL_KEYUP:
 110                 demo_keyboard(ev->key.keysym.sym, ev->key.state == SDL_PRESSED ? 1 : 0);
 111                 break;
 112
 113         case SDL_MOUSEMOTION:
 114                 mouse_x = ev->motion.x / fbscale;
 115                 mouse_y = ev->motion.y / fbscale;
 116                 break;
 117
 118         case SDL_MOUSEBUTTONDOWN:
 119                 mouse_bmask |= 1 << ev->button.button;
 120                 if(0) {
 121         case SDL_MOUSEBUTTONUP:
 122                         mouse_bmask &= ~(1 << ev->button.button);
 123                 }
 124                 mouse_x = ev->button.x / fbscale;
 125                 mouse_y = ev->button.y / fbscale;
 126                 break;
 127
 128         default:
 129                 break;
 130         }
 131 }