fractal effect is cooking

[dosdemo] / src / dos / main.c

diff --git a/src/dos/main.c b/src/dos/main.c
index ac2ccd2..442f343 100644 (file)
--- a/src/dos/main.c
+++ b/src/dos/main.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <limits.h>
 #include "demo.h"
 #include "keyb.h"
 #include "timer.h"
@@ -8,10 +9,18 @@ static int quit;
 
 int main(int argc, char **argv)
 {
+       void *vmem;
+       long fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
+
        init_timer(100);
        kb_init(32);
 
-       if(!(fb_pixels = set_video_mode(fb_width, fb_height, fb_bpp))) {
+       if(!(fb_pixels = malloc(fbsize))) {
+               fprintf(stderr, "failed to allocate backbuffer\n");
+               return 1;
+       }
+
+       if(!(vmem = set_video_mode(fb_width, fb_height, fb_bpp))) {
                return 1;
        }
 
@@ -28,9 +37,13 @@ int main(int argc, char **argv)
                }
                if(quit) goto break_evloop;
 
-               /*wait_vsync();*/
+               mouse_bmask = read_mouse(&mouse_x, &mouse_y);
+
                time_msec = get_msec();
                demo_draw();
+
+               /*wait_vsync();*/
+               memcpy(vmem, fb_pixels, fbsize);
        }
 
 break_evloop: