Index: head/lib/libvgl/simple.c
===================================================================
--- head/lib/libvgl/simple.c	(revision 346889)
+++ head/lib/libvgl/simple.c	(revision 346890)
@@ -1,688 +1,688 @@
 /*-
  * SPDX-License-Identifier: BSD-3-Clause
  *
  * Copyright (c) 1991-1997 Søren Schmidt
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer
  *    in this position and unchanged.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <signal.h>
 #include <sys/fbio.h>
 #include <sys/kbio.h>
 #include <sys/endian.h>
 #include "vgl.h"
 
 static int VGLBlank;
 static byte VGLBorderColor;
 static byte VGLSavePaletteRed[256];
 static byte VGLSavePaletteGreen[256];
 static byte VGLSavePaletteBlue[256];
 
 #define ABS(a)		(((a)<0) ? -(a) : (a))
 #define SGN(a)		(((a)<0) ? -1 : 1)
 #define min(x, y)	(((x) < (y)) ? (x) : (y))
 #define max(x, y)	(((x) > (y)) ? (x) : (y))
 
 void
 VGLSetXY(VGLBitmap *object, int x, int y, u_long color)
 {
   int offset, soffset, undermouse;
 
   VGLCheckSwitch();
   if (x>=0 && x<object->VXsize && y>=0 && y<object->VYsize) {
     if (object == VGLDisplay) {
       undermouse = VGLMouseFreezeXY(x, y);
       VGLSetXY(&VGLVDisplay, x, y, color);
     } else if (object->Type != MEMBUF)
       return;		/* invalid */
     else
       undermouse = 0;
     if (!undermouse) {
       offset = (y * object->VXsize + x) * object->PixelBytes;
       switch (object->Type) {
       case VIDBUF8S:
       case VIDBUF16S:
       case VIDBUF32S:
         offset = VGLSetSegment(offset);
         /* FALLTHROUGH */
       case MEMBUF:
       case VIDBUF8:
       case VIDBUF16:
       case VIDBUF24:
       case VIDBUF32:
         color = htole32(color);
         switch (object->PixelBytes) {
         case 1:
           memcpy(&object->Bitmap[offset], &color, 1);
           break;
         case 2:
           memcpy(&object->Bitmap[offset], &color, 2);
           break;
         case 3:
           memcpy(&object->Bitmap[offset], &color, 3);
           break;
         case 4:
           memcpy(&object->Bitmap[offset], &color, 4);
           break;
         }
         break;
       case VIDBUF24S:
         soffset = VGLSetSegment(offset);
         color = htole32(color);
         switch (VGLAdpInfo.va_window_size - soffset) {
         case 1:
           memcpy(&object->Bitmap[soffset], &color, 1);
           soffset = VGLSetSegment(offset + 1);
           memcpy(&object->Bitmap[soffset], (byte *)&color + 1, 2);
           break;
         case 2:
           memcpy(&object->Bitmap[soffset], &color, 2);
           soffset = VGLSetSegment(offset + 2);
           memcpy(&object->Bitmap[soffset], (byte *)&color + 2, 1);
           break;
         default:
           memcpy(&object->Bitmap[soffset], &color, 3);
           break;
         }
         break;
       case VIDBUF8X:
         outb(0x3c4, 0x02);
         outb(0x3c5, 0x01 << (x&0x3));
 	object->Bitmap[(unsigned)(VGLAdpInfo.va_line_width*y)+(x/4)] = ((byte)color);
 	break;
       case VIDBUF4S:
 	offset = VGLSetSegment(y*VGLAdpInfo.va_line_width + x/8);
 	goto set_planar;
       case VIDBUF4:
 	offset = y*VGLAdpInfo.va_line_width + x/8;
 set_planar:
         outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
         outb(0x3ce, 0x00); outb(0x3cf, (byte)color & 0x0f);	/* set/reset */
         outb(0x3ce, 0x01); outb(0x3cf, 0x0f);		/* set/reset enable */
         outb(0x3ce, 0x08); outb(0x3cf, 0x80 >> (x%8));	/* bit mask */
 	object->Bitmap[offset] |= (byte)color;
       }
     }
     if (object == VGLDisplay)
       VGLMouseUnFreeze();
   }
 }
 
 u_long
 VGLGetXY(VGLBitmap *object, int x, int y)
 {
   u_long color;
   int offset;
 
   VGLCheckSwitch();
   if (x<0 || x>=object->VXsize || y<0 || y>=object->VYsize)
     return 0;
   if (object == VGLDisplay)
     object = &VGLVDisplay;
   else if (object->Type != MEMBUF)
     return 0;		/* invalid */
   offset = (y * object->VXsize + x) * object->PixelBytes;
   switch (object->PixelBytes) {
   case 1:
     memcpy(&color, &object->Bitmap[offset], 1);
     return le32toh(color) & 0xff;
   case 2:
     memcpy(&color, &object->Bitmap[offset], 2);
     return le32toh(color) & 0xffff;
   case 3:
     memcpy(&color, &object->Bitmap[offset], 3);
     return le32toh(color) & 0xffffff;
   case 4:
     memcpy(&color, &object->Bitmap[offset], 4);
     return le32toh(color);
   }
   return 0;		/* invalid */
 }
 
  /*
   * Symmetric Double Step Line Algorithm by Brian Wyvill from
   * "Graphics Gems", Academic Press, 1990.
   */
 
 #define SL_SWAP(a,b)           {a^=b; b^=a; a^=b;}
 #define SL_ABSOLUTE(i,j,k)     ( (i-j)*(k = ( (i-j)<0 ? -1 : 1)))
 
 void
 plot(VGLBitmap * object, int x, int y, int flag, u_long color)
 {
   /* non-zero flag indicates the pixels need swapping back. */
   if (flag)
     VGLSetXY(object, y, x, color);
   else
     VGLSetXY(object, x, y, color);
 }
 
 
 void
 VGLLine(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
 {
   int dx, dy, incr1, incr2, D, x, y, xend, c, pixels_left;
   int sign_x, sign_y, step, reverse, i;
 
   dx = SL_ABSOLUTE(x2, x1, sign_x);
   dy = SL_ABSOLUTE(y2, y1, sign_y);
   /* decide increment sign by the slope sign */
   if (sign_x == sign_y)
     step = 1;
   else
     step = -1;
 
   if (dy > dx) {	/* chooses axis of greatest movement (make dx) */
     SL_SWAP(x1, y1);
     SL_SWAP(x2, y2);
     SL_SWAP(dx, dy);
     reverse = 1;
   } else
     reverse = 0;
   /* note error check for dx==0 should be included here */
   if (x1 > x2) {      /* start from the smaller coordinate */
     x = x2;
     y = y2;
 /*  x1 = x1;
     y1 = y1; */
   } else {
     x = x1;
     y = y1;
     x1 = x2;
     y1 = y2;
   }
 
 
   /* Note dx=n implies 0 - n or (dx+1) pixels to be set */
   /* Go round loop dx/4 times then plot last 0,1,2 or 3 pixels */
   /* In fact (dx-1)/4 as 2 pixels are already plotted */
   xend = (dx - 1) / 4;
   pixels_left = (dx - 1) % 4;  /* number of pixels left over at the
            * end */
   plot(object, x, y, reverse, color);
   if (pixels_left < 0)
     return;      /* plot only one pixel for zero length
            * vectors */
   plot(object, x1, y1, reverse, color);  /* plot first two points */
   incr2 = 4 * dy - 2 * dx;
   if (incr2 < 0) {    /* slope less than 1/2 */
     c = 2 * dy;
     incr1 = 2 * c;
     D = incr1 - dx;
 
     for (i = 0; i < xend; i++) {  /* plotting loop */
       ++x;
       --x1;
       if (D < 0) {
         /* pattern 1 forwards */
         plot(object, x, y, reverse, color);
         plot(object, ++x, y, reverse, color);
         /* pattern 1 backwards */
         plot(object, x1, y1, reverse, color);
         plot(object, --x1, y1, reverse, color);
         D += incr1;
       } else {
         if (D < c) {
           /* pattern 2 forwards */
           plot(object, x, y, reverse, color);
           plot(object, ++x, y += step, reverse,
               color);
           /* pattern 2 backwards */
           plot(object, x1, y1, reverse, color);
           plot(object, --x1, y1 -= step, reverse,
               color);
         } else {
           /* pattern 3 forwards */
           plot(object, x, y += step, reverse, color);
           plot(object, ++x, y, reverse, color);
           /* pattern 3 backwards */
           plot(object, x1, y1 -= step, reverse,
               color);
           plot(object, --x1, y1, reverse, color);
         }
         D += incr2;
       }
     }      /* end for */
 
     /* plot last pattern */
     if (pixels_left) {
       if (D < 0) {
         plot(object, ++x, y, reverse, color);  /* pattern 1 */
         if (pixels_left > 1)
           plot(object, ++x, y, reverse, color);
         if (pixels_left > 2)
           plot(object, --x1, y1, reverse, color);
       } else {
         if (D < c) {
           plot(object, ++x, y, reverse, color);  /* pattern 2  */
           if (pixels_left > 1)
             plot(object, ++x, y += step, reverse, color);
           if (pixels_left > 2)
             plot(object, --x1, y1, reverse, color);
         } else {
           /* pattern 3 */
           plot(object, ++x, y += step, reverse, color);
           if (pixels_left > 1)
             plot(object, ++x, y, reverse, color);
           if (pixels_left > 2)
             plot(object, --x1, y1 -= step, reverse, color);
         }
       }
     }      /* end if pixels_left */
   }
   /* end slope < 1/2 */
   else {        /* slope greater than 1/2 */
     c = 2 * (dy - dx);
     incr1 = 2 * c;
     D = incr1 + dx;
     for (i = 0; i < xend; i++) {
       ++x;
       --x1;
       if (D > 0) {
         /* pattern 4 forwards */
         plot(object, x, y += step, reverse, color);
         plot(object, ++x, y += step, reverse, color);
         /* pattern 4 backwards */
         plot(object, x1, y1 -= step, reverse, color);
         plot(object, --x1, y1 -= step, reverse, color);
         D += incr1;
       } else {
         if (D < c) {
           /* pattern 2 forwards */
           plot(object, x, y, reverse, color);
           plot(object, ++x, y += step, reverse,
               color);
 
           /* pattern 2 backwards */
           plot(object, x1, y1, reverse, color);
           plot(object, --x1, y1 -= step, reverse,
               color);
         } else {
           /* pattern 3 forwards */
           plot(object, x, y += step, reverse, color);
           plot(object, ++x, y, reverse, color);
           /* pattern 3 backwards */
           plot(object, x1, y1 -= step, reverse, color);
           plot(object, --x1, y1, reverse, color);
         }
         D += incr2;
       }
     }      /* end for */
     /* plot last pattern */
     if (pixels_left) {
       if (D > 0) {
         plot(object, ++x, y += step, reverse, color);  /* pattern 4 */
         if (pixels_left > 1)
           plot(object, ++x, y += step, reverse,
               color);
         if (pixels_left > 2)
           plot(object, --x1, y1 -= step, reverse,
               color);
       } else {
         if (D < c) {
           plot(object, ++x, y, reverse, color);  /* pattern 2  */
           if (pixels_left > 1)
             plot(object, ++x, y += step, reverse, color);
           if (pixels_left > 2)
             plot(object, --x1, y1, reverse, color);
         } else {
           /* pattern 3 */
           plot(object, ++x, y += step, reverse, color);
           if (pixels_left > 1)
             plot(object, ++x, y, reverse, color);
           if (pixels_left > 2) {
             if (D > c)  /* step 3 */
               plot(object, --x1, y1 -= step, reverse, color);
             else  /* step 2 */
               plot(object, --x1, y1, reverse, color);
           }
         }
       }
     }
   }
 }
 
 void
 VGLBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
 {
   VGLLine(object, x1, y1, x2, y1, color);
   VGLLine(object, x2, y1, x2, y2, color);
   VGLLine(object, x2, y2, x1, y2, color);
   VGLLine(object, x1, y2, x1, y1, color);
 }
 
 void
 VGLFilledBox(VGLBitmap *object, int x1, int y1, int x2, int y2, u_long color)
 {
   int y;
 
   for (y=y1; y<=y2; y++) VGLLine(object, x1, y, x2, y, color);
 }
 
 static inline void
 set4pixels(VGLBitmap *object, int x, int y, int xc, int yc, u_long color)
 {
   if (x!=0) { 
     VGLSetXY(object, xc+x, yc+y, color); 
     VGLSetXY(object, xc-x, yc+y, color); 
     if (y!=0) { 
       VGLSetXY(object, xc+x, yc-y, color); 
       VGLSetXY(object, xc-x, yc-y, color); 
     } 
   } 
   else { 
     VGLSetXY(object, xc, yc+y, color); 
     if (y!=0) 
       VGLSetXY(object, xc, yc-y, color); 
   } 
 }
 
 void
 VGLEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color)
 {
   int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
   int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
 
   while (dx<dy) {
     set4pixels(object, x, y, xc, yc, color);
     if (d>0) {
       y--; dy-=asq2; d-=dy;
     }
     x++; dx+=bsq2; d+=bsq+dx;
   }
   d+=(3*(asq-bsq)/2-(dx+dy))/2;
   while (y>=0) {
     set4pixels(object, x, y, xc, yc, color);
     if (d<0) {
       x++; dx+=bsq2; d+=dx;
     }
     y--; dy-=asq2; d+=asq-dy;
   }
 }
 
 static inline void
 set2lines(VGLBitmap *object, int x, int y, int xc, int yc, u_long color)
 {
   if (x!=0) { 
     VGLLine(object, xc+x, yc+y, xc-x, yc+y, color); 
     if (y!=0) 
       VGLLine(object, xc+x, yc-y, xc-x, yc-y, color); 
   } 
   else { 
     VGLLine(object, xc, yc+y, xc, yc-y, color); 
   } 
 }
 
 void
 VGLFilledEllipse(VGLBitmap *object, int xc, int yc, int a, int b, u_long color)
 {
   int x = 0, y = b, asq = a*a, asq2 = a*a*2, bsq = b*b;
   int bsq2 = b*b*2, d = bsq-asq*b+asq/4, dx = 0, dy = asq2*b;
 
   while (dx<dy) {
     set2lines(object, x, y, xc, yc, color);
     if (d>0) {
       y--; dy-=asq2; d-=dy;
     }
     x++; dx+=bsq2; d+=bsq+dx;
   }
   d+=(3*(asq-bsq)/2-(dx+dy))/2;
   while (y>=0) {
     set2lines(object, x, y, xc, yc, color);
     if (d<0) {
       x++; dx+=bsq2; d+=dx;
     }
     y--; dy-=asq2; d+=asq-dy;
   }
 }
 
 void
 VGLClear(VGLBitmap *object, u_long color)
 {
   VGLBitmap src;
   int i, len, mousemode, offset;
 
   VGLCheckSwitch();
   if (object == VGLDisplay) {
     VGLMouseFreeze();
     VGLClear(&VGLVDisplay, color);
   } else if (object->Type != MEMBUF)
     return;		/* invalid */
   switch (object->Type) {
   case MEMBUF:
   case VIDBUF8:
   case VIDBUF8S:
   case VIDBUF16:
   case VIDBUF16S:
   case VIDBUF24:
   case VIDBUF24S:
   case VIDBUF32:
   case VIDBUF32S:
     src.Type = MEMBUF;
     src.Xsize = object->Xsize;
     src.VXsize = object->VXsize;
     src.Ysize = 1;
     src.VYsize = 1;
     src.Xorigin = 0;
     src.Yorigin = 0;
     src.Bitmap = alloca(object->VXsize * object->PixelBytes);
     src.PixelBytes = object->PixelBytes;
     color = htole32(color);
     for (i = 0; i < object->VXsize; i++)
       bcopy(&color, src.Bitmap + i * object->PixelBytes, object->PixelBytes);
     for (i = 0; i < object->VYsize; i++)
-      __VGLBitmapCopy(&src, 0, 0, object, 0, i, object->VXsize, 1);
+      __VGLBitmapCopy(&src, 0, 0, object, 0, i, object->VXsize, -1);
     break;
 
   case VIDBUF8X:
     mousemode = __VGLMouseMode(VGL_MOUSEHIDE);
     /* XXX works only for Xsize % 4 = 0 */
     outb(0x3c6, 0xff);
     outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
     memset(object->Bitmap, (byte)color, VGLAdpInfo.va_line_width*object->VYsize);
     __VGLMouseMode(mousemode);
     break;
 
   case VIDBUF4:
   case VIDBUF4S:
     mousemode = __VGLMouseMode(VGL_MOUSEHIDE);
     /* XXX works only for Xsize % 8 = 0 */
     outb(0x3c4, 0x02); outb(0x3c5, 0x0f);
     outb(0x3ce, 0x05); outb(0x3cf, 0x02);		/* mode 2 */
     outb(0x3ce, 0x01); outb(0x3cf, 0x00);		/* set/reset enable */
     outb(0x3ce, 0x08); outb(0x3cf, 0xff);		/* bit mask */
     for (offset = 0; offset < VGLAdpInfo.va_line_width*object->VYsize; ) {
       VGLSetSegment(offset);
       len = min(object->VXsize*object->VYsize - offset,
 		VGLAdpInfo.va_window_size);
       memset(object->Bitmap, (byte)color, len);
       offset += len;
     }
     outb(0x3ce, 0x05); outb(0x3cf, 0x00);
     __VGLMouseMode(mousemode);
     break;
   }
   if (object == VGLDisplay)
     VGLMouseUnFreeze();
 }
 
 static inline u_long
 VGLrgbToNative(uint16_t r, uint16_t g, uint16_t b)
 {
   int nr, ng, nb;
 
   nr = VGLModeInfo.vi_pixel_fsizes[2];
   ng = VGLModeInfo.vi_pixel_fsizes[1];
   nb = VGLModeInfo.vi_pixel_fsizes[0];
   return (r >> (16 - nr) << (ng + nb)) | (g >> (16 - ng) << nb) |
 	 (b >> (16 - nb) << 0);
 }
 
 u_long
 VGLrgb332ToNative(byte c)
 {
   uint16_t r, g, b;
 
   /* 3:3:2 to 16:16:16 */
   r = ((c & 0xe0) >> 5) * 0xffff / 7;
   g = ((c & 0x1c) >> 2) * 0xffff / 7;
   b = ((c & 0x03) >> 0) * 0xffff / 3;
 
   return VGLrgbToNative(r, g, b);
 }
 
 void
 VGLRestorePalette()
 {
   int i;
 
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     return;
   outb(0x3C6, 0xFF);
   inb(0x3DA); 
   outb(0x3C8, 0x00);
   for (i=0; i<256; i++) {
     outb(0x3C9, VGLSavePaletteRed[i]);
     inb(0x84);
     outb(0x3C9, VGLSavePaletteGreen[i]);
     inb(0x84);
     outb(0x3C9, VGLSavePaletteBlue[i]);
     inb(0x84);
   }
   inb(0x3DA);
   outb(0x3C0, 0x20);
 }
 
 void
 VGLSavePalette()
 {
   int i;
 
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     return;
   outb(0x3C6, 0xFF);
   inb(0x3DA);
   outb(0x3C7, 0x00);
   for (i=0; i<256; i++) {
     VGLSavePaletteRed[i] = inb(0x3C9);
     inb(0x84);
     VGLSavePaletteGreen[i] = inb(0x3C9);
     inb(0x84);
     VGLSavePaletteBlue[i] = inb(0x3C9);
     inb(0x84);
   }
   inb(0x3DA);
   outb(0x3C0, 0x20);
 }
 
 void
 VGLSetPalette(byte *red, byte *green, byte *blue)
 {
   int i;
   
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     return;
   for (i=0; i<256; i++) {
     VGLSavePaletteRed[i] = red[i];
     VGLSavePaletteGreen[i] = green[i];
     VGLSavePaletteBlue[i] = blue[i];
   }
   VGLCheckSwitch();
   outb(0x3C6, 0xFF);
   inb(0x3DA); 
   outb(0x3C8, 0x00);
   for (i=0; i<256; i++) {
     outb(0x3C9, VGLSavePaletteRed[i]);
     inb(0x84);
     outb(0x3C9, VGLSavePaletteGreen[i]);
     inb(0x84);
     outb(0x3C9, VGLSavePaletteBlue[i]);
     inb(0x84);
   }
   inb(0x3DA);
   outb(0x3C0, 0x20);
 }
 
 void
 VGLSetPaletteIndex(byte color, byte red, byte green, byte blue)
 {
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     return;
   VGLSavePaletteRed[color] = red;
   VGLSavePaletteGreen[color] = green;
   VGLSavePaletteBlue[color] = blue;
   VGLCheckSwitch();
   outb(0x3C6, 0xFF);
   inb(0x3DA);
   outb(0x3C8, color); 
   outb(0x3C9, red); outb(0x3C9, green); outb(0x3C9, blue);
   inb(0x3DA);
   outb(0x3C0, 0x20);
 }
 
 void
 VGLRestoreBorder(void)
 {
   VGLSetBorder(VGLBorderColor);
 }
 
 void
 VGLSetBorder(byte color)
 {
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT && ioctl(0, KDENABIO, 0))
     return;
   VGLCheckSwitch();
   inb(0x3DA);
   outb(0x3C0,0x11); outb(0x3C0, color); 
   inb(0x3DA);
   outb(0x3C0, 0x20);
   VGLBorderColor = color;
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     ioctl(0, KDDISABIO, 0);
 }
 
 void
 VGLRestoreBlank(void)
 {
   VGLBlankDisplay(VGLBlank);
 }
 
 void
 VGLBlankDisplay(int blank)
 {
   byte val;
 
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT && ioctl(0, KDENABIO, 0))
     return;
   VGLCheckSwitch();
   outb(0x3C4, 0x01); val = inb(0x3C5); outb(0x3C4, 0x01);
   outb(0x3C5, ((blank) ? (val |= 0x20) : (val &= 0xDF)));
   VGLBlank = blank;
   if (VGLModeInfo.vi_mem_model == V_INFO_MM_DIRECT)
     ioctl(0, KDDISABIO, 0);
 }