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 #include "tinyfps.h"
   7
   8 static void handle_event(SDL_Event *ev);
   9 static void toggle_fullscreen(void);
  10
  11 static int quit;
  12 static long start_time;
  13 static SDL_Surface *fbsurf;
  14
  15 static int fbscale = 2;
  16 static int xsz, ysz;
  17 static unsigned int sdl_flags = SDL_SWSURFACE;
  18
  19 int main(int argc, char **argv)
  20 {
  21         int s, i, j;
  22         char *env;
  23         unsigned short *sptr, *dptr;
  24
  25         if((env = getenv("FBSCALE")) && (s = atoi(env))) {
  26                 fbscale = s;
  27                 printf("Framebuffer scaling x%d\n", fbscale);
  28         }
  29
  30         xsz = fb_width * fbscale;
  31         ysz = fb_height * fbscale;
  32
  33         if(!(fb_pixels = malloc(fb_width * fb_height * fb_bpp / CHAR_BIT))) {
  34                 fprintf(stderr, "failed to allocate virtual framebuffer\n");
  35                 return 1;
  36         }
  37         vmem_front = vmem_back = fb_pixels;
  38
  39         SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
  40         if(!(fbsurf = SDL_SetVideoMode(xsz, ysz, fb_bpp, sdl_flags))) {
  41                 fprintf(stderr, "failed to set video mode %dx%d %dbpp\n", fb_width, fb_height, fb_bpp);
  42                 free(fb_pixels);
  43                 SDL_Quit();
  44                 return 1;
  45         }
  46         SDL_WM_SetCaption("dosdemo/SDL", 0);
  47
  48         time_msec = 0;
  49         if(demo_init(argc, argv) == -1) {
  50                 free(fb_pixels);
  51                 SDL_Quit();
  52                 return 1;
  53         }
  54         start_time = SDL_GetTicks();
  55
  56         while(!quit) {
  57                 SDL_Event ev;
  58                 while(SDL_PollEvent(&ev)) {
  59                         handle_event(&ev);
  60                         if(quit) goto break_evloop;
  61                 }
  62
  63                 time_msec = SDL_GetTicks() - start_time;
  64                 demo_draw();
  65                 drawFps(fb_pixels);
  66
  67                 if(SDL_MUSTLOCK(fbsurf)) {
  68                         SDL_LockSurface(fbsurf);
  69                 }
  70
  71                 sptr = fb_pixels;
  72                 dptr = (unsigned short*)fbsurf->pixels + (fbsurf->w - xsz) / 2;
  73                 for(i=0; i<fb_height; i++) {
  74                         for(j=0; j<fb_width; j++) {
  75                                 int x, y;
  76                                 unsigned short pixel = *sptr++;
  77
  78                                 for(y=0; y<fbscale; y++) {
  79                                         for(x=0; x<fbscale; x++) {
  80                                                 dptr[y * fbsurf->w + x] = pixel;
  81                                         }
  82                                 }
  83                                 dptr += fbscale;
  84                         }
  85                         dptr += (fbsurf->w - fb_width) * fbscale;
  86                 }
  87
  88                 if(SDL_MUSTLOCK(fbsurf)) {
  89                         SDL_UnlockSurface(fbsurf);
  90                 }
  91                 SDL_Flip(fbsurf);
  92         }
  93
  94 break_evloop:
  95         demo_cleanup();
  96         SDL_Quit();
  97         return 0;
  98 }
  99
 100 void demo_quit(void)
 101 {
 102         quit = 1;
 103 }
 104
 105 void swap_buffers(void *pixels)
 106 {
 107         /* do nothing, all pointers point to the same buffer */
 108 }
 109
 110 static void handle_event(SDL_Event *ev)
 111 {
 112         switch(ev->type) {
 113         case SDL_QUIT:
 114                 quit = 1;
 115                 break;
 116
 117         case SDL_KEYDOWN:
 118         case SDL_KEYUP:
 119                 if(ev->key.keysym.sym == 'f') {
 120                         if(ev->key.state == SDL_PRESSED) {
 121                                 toggle_fullscreen();
 122                         }
 123                         break;
 124                 }
 125                 demo_keyboard(ev->key.keysym.sym, ev->key.state == SDL_PRESSED ? 1 : 0);
 126                 break;
 127
 128         case SDL_MOUSEMOTION:
 129                 mouse_x = ev->motion.x / fbscale;
 130                 mouse_y = ev->motion.y / fbscale;
 131                 break;
 132
 133         case SDL_MOUSEBUTTONDOWN:
 134                 mouse_bmask |= 1 << (ev->button.button - SDL_BUTTON_LEFT);
 135                 if(0) {
 136         case SDL_MOUSEBUTTONUP:
 137                         mouse_bmask &= ~(1 << (ev->button.button - SDL_BUTTON_LEFT));
 138                 }
 139                 mouse_x = ev->button.x / fbscale;
 140                 mouse_y = ev->button.y / fbscale;
 141                 break;
 142
 143         default:
 144                 break;
 145         }
 146 }
 147
 148 static void toggle_fullscreen(void)
 149 {
 150         SDL_Surface *newsurf;
 151         unsigned int newflags = sdl_flags ^ SDL_FULLSCREEN;
 152
 153         if(!(newsurf = SDL_SetVideoMode(xsz, ysz, fb_bpp, newflags))) {
 154                 fprintf(stderr, "failed to go %s\n", newflags & SDL_FULLSCREEN ? "fullscreen" : "windowed");
 155                 return;
 156         }
 157
 158         fbsurf = newsurf;
 159         sdl_flags = newflags;
 160 }