> I have run into a problem in that I can't get my virtual screen to
> display on the physical - this makes it rather difficult to see what's
> going on :)
You forgot to gl_setcontextvga(35) . (you had vgavirtual, but you need
vga, too). That will fix your gl_freecontext() problems, too.
-J
#include <stdio.h>
#include <stdlib.h>
#include <vgagl.h>
#include <vga.h>
main()
{
GraphicsContext *virtualscreen;
GraphicsContext *physicalscreen;
vga_init();
/*** create virtual screen ***/
gl_setcontextvgavirtual(35); /* G800x600x16M32 */
virtualscreen=gl_allocatecontext();
gl_getcontext(virtualscreen);
/*** create physical screen ***/
vga_setmode(35);
/* fix below */
gl_setcontextvga(35); /* G800x600x16M32 */
physicalscreen=gl_allocatecontext();
gl_getcontext(physicalscreen);
gl_setcontext(virtualscreen);
/* draw something here using gl_setpixelrgb() */
gl_copyscreen(physicalscreen);
/*** the documentation appears to be wrong here in that */
/*** gl_copyscreen(&physicalscreen) is suggested yet this */
/*** causes a compilation error for me */
while(getchar() != 'x');
/*** at this stage, I should have something visible and be */
/*** waiting for an 'x' input to terminate the programme */
/*** but in fact I am left looking at the same blank screen */
/*** that I started with :( */
vga_setmode(TEXT);
gl_freecontext(virtualscreen);
/* gl_freecontext(physicalscreen);*/
/*** the commented out line above causes a segmentation fault */
/*** as discussed in my last post */
return (0);
}
