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         vmem_front = vmem_back = fb_pixels;
  36
  37         SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
  38         if(!(fbsurf = SDL_SetVideoMode(xsz, ysz, fb_bpp, sdl_flags))) {
  39                 fprintf(stderr, "failed to set video mode %dx%d %dbpp\n", fb_width, fb_height, fb_bpp);
  40                 free(fb_pixels);
  41                 SDL_Quit();
  42                 return 1;
  43         }
  44         SDL_WM_SetCaption("dosdemo/SDL", 0);
  45
  46         time_msec = 0;
  47         if(demo_init(argc, argv) == -1) {
  48                 free(fb_pixels);
  49                 SDL_Quit();
  50                 return 1;
  51         }
  52         start_time = SDL_GetTicks();
  53
  54         while(!quit) {
  55                 SDL_Event ev;
  56                 while(SDL_PollEvent(&ev)) {
  57                         handle_event(&ev);
  58                         if(quit) goto break_evloop;
  59                 }
  60
  61                 time_msec = SDL_GetTicks() - start_time;
  62                 demo_draw();
  63
  64                 if(SDL_MUSTLOCK(fbsurf)) {
  65                         SDL_LockSurface(fbsurf);
  66                 }
  67
  68                 sptr = fb_pixels;
  69                 dptr = fbsurf->pixels;
  70                 for(i=0; i<fb_height; i++) {
  71                         for(j=0; j<fb_width; j++) {
  72                                 int x, y;
  73                                 unsigned short pixel = *sptr++;
  74
  75                                 for(y=0; y<fbscale; y++) {
  76                                         for(x=0; x<fbscale; x++) {
  77                                                 dptr[y * xsz + x] = pixel;
  78                                         }
  79                                 }
  80                                 dptr += fbscale;
  81                         }
  82                         dptr += xsz * (fbscale - 1);
  83                 }
  84
  85                 if(SDL_MUSTLOCK(fbsurf)) {
  86                         SDL_UnlockSurface(fbsurf);
  87                 }
  88                 SDL_Flip(fbsurf);
  89         }
  90
  91 break_evloop:
  92         demo_cleanup();
  93         SDL_Quit();
  94         return 0;
  95 }
  96
  97 void demo_quit(void)
  98 {
  99         quit = 1;
 100 }
 101
 102 void swap_buffers(void *pixels)
 103 {
 104         /* do nothing, all pointers point to the same buffer */
 105 }
 106
 107 static void handle_event(SDL_Event *ev)
 108 {
 109         switch(ev->type) {
 110         case SDL_QUIT:
 111                 quit = 1;
 112                 break;
 113
 114         case SDL_KEYDOWN:
 115         case SDL_KEYUP:
 116                 demo_keyboard(ev->key.keysym.sym, ev->key.state == SDL_PRESSED ? 1 : 0);
 117                 break;
 118
 119         case SDL_MOUSEMOTION:
 120                 mouse_x = ev->motion.x / fbscale;
 121                 mouse_y = ev->motion.y / fbscale;
 122                 break;
 123
 124         case SDL_MOUSEBUTTONDOWN:
 125                 mouse_bmask |= 1 << ev->button.button;
 126                 if(0) {
 127         case SDL_MOUSEBUTTONUP:
 128                         mouse_bmask &= ~(1 << ev->button.button);
 129                 }
 130                 mouse_x = ev->button.x / fbscale;
 131                 mouse_y = ev->button.y / fbscale;
 132                 break;
 133
 134         default:
 135                 break;
 136         }
 137 }