Initial. Don't... just don't ask.

demos/bg_test.c

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+/*                             bg_test.c
+
+
+	Copyright (c) 1997  Michael Friman. All rights reserved.
+
+
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <strings.h>
+#include <vga.h>
+#include <vgagl.h>
+
+/*
+  If you really want to see background runin, add after 
+  vga_setmode vga_runinbackground(1) in fun.
+  Remember to compile the svgalib with background.
+*/
+
+int go = 0;
+int linear = 0;
+
+void drawline(int x1, int y1, int x2, int y2)
+
+{
+ if (linear)
+     {
+      gl_line(x1,y1,x2,y2,vga_white());
+     }
+ else
+     {
+      vga_drawline(x1,y1,x2,y2);
+     }
+}
+
+void set_go(void)
+
+{
+ go=1;
+ return;
+}
+
+int main(int argc, char *argv[])
+
+{
+ int x[2];
+ int y[2];
+ int counter;
+ int mode;
+
+ if ((argc > 2) || ((argc == 2) && (strcmp(argv[1], "linear") != 0)))
+     {
+      fputs("Usage: bg_test [linear]\n", stderr);
+      exit(2);
+     }
+ vga_init();
+ printf("This is small test for background runin.\n");
+ if (vga_runinbackground_version()==1 || vga_runinbackground_version()>=3)
+     {
+      printf("Background runin enabled. mode %d\n", vga_runinbackground_version());
+     }
+   else
+     {
+      printf("Svgalib is not background capable.\n");
+      printf("Test ended.\n");
+      return(0);
+     }
+ printf("Switch to another console when the box appears.\n");
+ printf("Press enter to continue or CTRL-c to stop.\n");
+ getchar();
+ 
+ mode = vga_getdefaultmode();
+ if (mode < 0)
+     mode = G320x200x256;
+ if (argc == 2)
+     {
+      if (vga_getmodeinfo(mode)->flags & CAPABLE_LINEAR)
+       {
+	vga_setlinearaddressing();
+	fputs("Linear mode set.\n", stderr);
+        linear = 1;
+       }
+      else
+       {
+	fputs("Linear mode unavailable.\n", stderr);
+       }
+     }
+ vga_setmode(mode);
+ if (linear)
+     gl_setcontextvga(mode);
+ vga_runinbackground(VGA_GOTOBACK,set_go); 
+ vga_runinbackground(1); 
+ x[0]=0;
+ y[0]=0;
+ x[1]=vga_getxdim()-1;
+ y[1]=vga_getydim()-1;
+
+ if (!linear)
+     vga_setcolor(vga_white()); 
+ counter=(y[1]/11)*5+1;
+ while(counter<=(y[1]/11)*6)
+   {
+    drawline((x[1]/11)*5,counter,(x[1]/11)*6,counter);
+    counter++;
+   }
+   
+ /* Program won't go further without console switching. */
+ 
+ while(!go) usleep(1000);
+  
+ drawline(x[0],y[0],x[1],y[0]);
+ drawline(x[1],y[0],x[1],y[1]);
+ drawline(x[1],y[1],x[0],y[1]);
+ drawline(x[0],y[1],x[0],y[0]);
+
+ drawline(x[0],y[0],x[1],y[1]);
+ drawline(x[1],y[0],x[0],y[1]);
+
+
+ while(!vga_getkey());
+ 
+ vga_setmode(TEXT);
+ 
+ printf("Ok.\n");
+ return(0);
+}
+