added two new global pointers in demo.h: vmem_back and vmem_front, and

[dosdemo] / src / dos / main.c

diff --git a/src/dos/main.c b/src/dos/main.c
index 06fd0bb..10492fe 100644 (file)
--- a/src/dos/main.c
+++ b/src/dos/main.c
@@ -10,11 +10,11 @@
 
 static int quit;
 static int use_mouse;
+static long fbsize;
 
 int main(int argc, char **argv)
 {
-       void *vmem;
-       long fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
+       fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
 
        init_timer(100);
        kb_init(32);
@@ -29,9 +29,11 @@ int main(int argc, char **argv)
                return 1;
        }
 
-       if(!(vmem = set_video_mode(fb_width, fb_height, fb_bpp))) {
+       if(!(vmem_front = set_video_mode(fb_width, fb_height, fb_bpp))) {
                return 1;
        }
+       /* TODO implement multiple video memory pages for flipping */
+       vmem_back = vmem_front;
 
        if(demo_init(argc, argv) == -1) {
                set_text_mode();
@@ -52,9 +54,6 @@ int main(int argc, char **argv)
 
                time_msec = get_msec();
                demo_draw();
-
-               /*wait_vsync();*/
-               memcpy(vmem, fb_pixels, fbsize);
        }
 
 break_evloop:
@@ -68,3 +67,12 @@ void demo_quit(void)
 {
        quit = 1;
 }
+
+void swap_buffers(void *pixels)
+{
+       /* TODO implement page flipping */
+       if(pixels) {
+               /*wait_vsync();*/
+               memcpy(vmem_front, pixels, fbsize);
+       }
+}