void
VGLEnd(void)
{
struct vt_mode smode;
if (!VGLInitDone)
return;
VGLInitDone = 0;
VGLSwitchPending = 0;
VGLAbortPending = 0;
signal(SIGUSR1, SIG_IGN);
if (VGLMem != MAP_FAILED) {
VGLClear(VGLDisplay, 0);
munmap(VGLMem, VGLAdpInfo.va_window_size);
}
if (VGLOldMode >= M_VESA_BASE) {
/* ugly, but necessary */
ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
if (VGLOldMode == M_VESA_800x600) {
int size[3];
size[0] = VGLOldWSize.ws_col;
size[1] = VGLOldWSize.ws_row;
size[2] = 16;
ioctl(0, KDRASTER, size);
}
} else {
ioctl(0, _IO('S', VGLOldMode), 0);
}
ioctl(0, KDDISABIO, 0);
ioctl(0, KDSETMODE, KD_TEXT);
smode.mode = VT_AUTO;
ioctl(0, VT_SETMODE, &smode);
if (VGLBuf)
free(VGLBuf);
VGLBuf = NULL;
free(VGLDisplay);
VGLDisplay = NULL;
VGLKeyboardEnd();
}
void
vgainit(void)
{
{int b=0; while (b);}
if (geteuid() != 0) {
fprintf(stderr, "The current graphics console architecture only permits " \
"super-user to access it, therefore you either have to obtain such permissions" \
"or ask your sysadmin to put set-user-id on digger executable.\n");
exit(1);
}
if (VGLInit(SW_VESA_CG640x400) != 0) {
fprintf(stderr, "WARNING! Could not initialise VESA mode. " \
"Trying to fallback to the VGA 640x480 mode\n");
if (VGLInit(SW_CG640x480) == 0)
yoffset = 40; /* Center the image */
else {
fprintf(stderr, "WARNING! Could not initialise VGA mode either. " \
"Please check your kernel.\n");
exit(1);
}
}
vgl_inited = 1;
sVGLDisplay = VGLBitmapCreate(MEMBUF, 640, 400, NULL);
VGLBitmapAllocateBits(sVGLDisplay);
VGLClear(sVGLDisplay, 0);
/*
* Since the VGL library doesn't provide a default way to restore console
* and keyboard after uncatched by the program signal, we should try to
* catch at least what we could catch and pray to God that he would not
* send SIGKILL to us.
*/
signal(SIGHUP, catcher);
signal(SIGINT, catcher);
signal(SIGQUIT, catcher);
signal(SIGABRT, catcher);
signal(SIGTERM, catcher);
signal(SIGSEGV, catcher);
signal(SIGBUS, catcher);
signal(SIGILL, catcher);
}
int
main(int argc, char **argv)
{
int y, xsize, ysize, i,j;
VGLBitmap *tmp;
// set graphics mode, here 320x240 256 colors
// supported modes are (from <sys/consio.h>):
// SW_VGA_CG320: std VGA 320x200 256 colors
// SW_VGA_MODEX: Modex VGA 320x240 256 colors
// SW_VGA_VG640: std VGA 640x480 16 colors
VGLInit(SW_VGA_MODEX);
// initialize mouse and show pointer
VGLMouseInit(VGL_MOUSESHOW);
// VGLDisplay is a ptr to a struct Bitmap defined and initialized by
// libvgl. The Bitmap points directly to screen memory etc.
xsize=VGLDisplay->Xsize;
ysize=VGLDisplay->Ysize;
// alloc a new bitmap
tmp = VGLBitmapCreate(MEMBUF, 256, 256, NULL);
VGLBitmapAllocateBits(tmp);
VGLClear(tmp, 0);
// fill the screen with colored lines
for (y=0; y<ysize; y++)
VGLLine(VGLDisplay, 0, y, xsize-1, y, y/2 % 256);
// draw some lines and circles just to show off
VGLLine(VGLDisplay, 0, 0, xsize-1, ysize-1, 63);
VGLLine(VGLDisplay, 0, ysize-1, xsize-1, 0, 63);
VGLLine(VGLDisplay, 0, 0, 0, ysize-1, 63);
VGLLine(VGLDisplay, xsize-1, 0, xsize-1, ysize-1, 63);
VGLEllipse(VGLDisplay, 256, 0, 256, 256, 63);
VGLEllipse(VGLDisplay, 0, 256, 256, 256, 0);
// some text is also useful
VGLBitmapString(VGLDisplay, 100,100,
"This is text", 63, 0, 0, VGL_DIR_RIGHT);
sleep(2);
VGLBitmapString(VGLDisplay, 100,100,
"This is text", 63, 0, 0, VGL_DIR_UP);
sleep(2);
VGLBitmapString(VGLDisplay, 100,100,
"This is text", 63, 0, 0, VGL_DIR_LEFT);
sleep(2);
VGLBitmapString(VGLDisplay, 100,100,
"This is text", 63, 0, 0, VGL_DIR_DOWN);
sleep(2);
// now show some simple bitblit
for (i=0; i<256; i++)
for (j=0; j<256; j++)
tmp->Bitmap[i+256*j] = i%16;
VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 0, 0, 128, 128);
for (i=0; i<256; i++)
for (j=0; j<256; j++)
tmp->Bitmap[i+256*j] = j%16;
VGLBitmapCopy(tmp, 0, 0, VGLDisplay, 3, 128, 128, 128);
sleep(2);
VGLBitmapCopy(VGLDisplay, 237, 311, tmp, 64, 64, 128, 128);
VGLBitmapCopy(tmp, 32, 32, VGLDisplay, 400, 128, 128, 128);
sleep(2);
VGLBitmapCopy(VGLDisplay, 300, 300, VGLDisplay, 500, 128, 128, 128);
sleep(5);
i=0;
// loop around drawing and copying
while (++i) {
VGLBitmapCopy(VGLDisplay, rand()%xsize, rand()%ysize,
VGLDisplay, rand()%xsize, rand()%ysize,
rand()%xsize, rand()%ysize);
VGLLine(VGLDisplay, rand()%xsize, rand()%ysize,
rand()%xsize, rand()%ysize, rand()%256);
VGLEllipse(VGLDisplay, rand()%xsize, rand()%ysize,
rand()%xsize/2, rand()%ysize/2, rand()%256);
rand();
if (i > 1000) break;
}
// restore screen to its original mode
VGLEnd();
return 0;
}
int
VGLInit(int mode)
{
struct vt_mode smode;
int adptype;
if (VGLInitDone)
return -1;
signal(SIGUSR1, VGLSwitch);
signal(SIGINT, VGLAbort);
signal(SIGTERM, VGLAbort);
signal(SIGSEGV, VGLAbort);
signal(SIGBUS, VGLAbort);
signal(SIGUSR2, SIG_IGN);
VGLOnDisplay = 1;
VGLSwitchPending = 0;
VGLAbortPending = 0;
if (ioctl(0, CONS_GET, &VGLOldMode) || ioctl(0, CONS_CURRENT, &adptype))
return -1;
VGLModeInfo.vi_mode = mode;
if (ioctl(0, CONS_MODEINFO, &VGLModeInfo)) /* FBIO_MODEINFO */
return -1;
/* If current mode is VESA_800x600 then save its geometry to restore later */
if ((VGLOldMode >= M_VESA_BASE) && (VGLOldMode == M_VESA_800x600))
if (ioctl(0, TIOCGWINSZ, &VGLOldWSize))
return -1;
VGLDisplay = (VGLBitmap *)malloc(sizeof(VGLBitmap));
if (VGLDisplay == NULL)
return -2;
if (ioctl(0, KDENABIO, 0)) {
free(VGLDisplay);
return -3;
}
VGLInitDone = 1;
/*
* vi_mem_model specifies the memory model of the current video mode
* in -CURRENT.
*/
switch (VGLModeInfo.vi_mem_model) {
case V_INFO_MM_PLANAR:
/* we can handle EGA/VGA planner modes only */
if (VGLModeInfo.vi_depth != 4 || VGLModeInfo.vi_planes != 4
|| (adptype != KD_EGA && adptype != KD_VGA)) {
VGLEnd();
return -4;
}
VGLDisplay->Type = VIDBUF4;
break;
case V_INFO_MM_PACKED:
/* we can do only 256 color packed modes */
if (VGLModeInfo.vi_depth != 8) {
VGLEnd();
return -4;
}
VGLDisplay->Type = VIDBUF8;
break;
case V_INFO_MM_VGAX:
VGLDisplay->Type = VIDBUF8X;
break;
default:
VGLEnd();
return -4;
}
ioctl(0, VT_WAITACTIVE, 0);
ioctl(0, KDSETMODE, KD_GRAPHICS);
if (ioctl(0, CONS_SET, &mode)) {
VGLEnd();
return -5;
}
if (ioctl(0, CONS_ADPINFO, &VGLAdpInfo)) { /* FBIO_ADPINFO */
VGLEnd();
return -6;
}
/*
* Calculate the shadow screen buffer size. In -CURRENT, va_buffer_size
* always holds the entire frame buffer size, wheather it's in the linear
* mode or windowed mode.
* VGLBufSize = VGLAdpInfo.va_buffer_size;
* In -STABLE, va_buffer_size holds the frame buffer size, only if
* the linear frame buffer mode is supported. Otherwise the field is zero.
* We shall calculate the minimal size in this case:
* VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*VGLModeInfo.vi_planes
* or
* VGLAdpInfo.va_window_size*VGLModeInfo.vi_planes;
* Use whichever is larger.
*/
if (VGLAdpInfo.va_buffer_size != 0)
VGLBufSize = VGLAdpInfo.va_buffer_size;
else
VGLBufSize = max(VGLAdpInfo.va_line_width*VGLModeInfo.vi_height,
VGLAdpInfo.va_window_size)*VGLModeInfo.vi_planes;
VGLBuf = malloc(VGLBufSize);
if (VGLBuf == NULL) {
VGLEnd();
return -7;
}
#ifdef LIBVGL_DEBUG
fprintf(stderr, "VGLBufSize:0x%x\n", VGLBufSize);
#endif
/* see if we are in the windowed buffer mode or in the linear buffer mode */
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size) {
if (VGLDisplay->Type == VIDBUF4)
VGLDisplay->Type = VIDBUF4S;
else if (VGLDisplay->Type == VIDBUF8)
VGLDisplay->Type = VIDBUF8S;
}
VGLMode = mode;
VGLCurWindow = 0;
VGLDisplay->Xsize = VGLModeInfo.vi_width;
VGLDisplay->Ysize = VGLModeInfo.vi_height;
VGLDisplay->VXsize = VGLAdpInfo.va_line_width
*8/(VGLModeInfo.vi_depth/VGLModeInfo.vi_planes);
VGLDisplay->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
VGLDisplay->Xorigin = 0;
VGLDisplay->Yorigin = 0;
VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
MAP_FILE, 0, 0);
if (VGLMem == MAP_FAILED) {
VGLEnd();
return -7;
}
VGLDisplay->Bitmap = VGLMem;
VGLSavePalette();
#ifdef LIBVGL_DEBUG
fprintf(stderr, "va_line_width:%d\n", VGLAdpInfo.va_line_width);
fprintf(stderr, "VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
VGLDisplay->Xsize, VGLDisplay->Ysize,
VGLDisplay->VXsize, VGLDisplay->VYsize);
#endif
smode.mode = VT_PROCESS;
smode.waitv = 0;
smode.relsig = SIGUSR1;
smode.acqsig = SIGUSR1;
smode.frsig = SIGINT;
if (ioctl(0, VT_SETMODE, &smode)) {
VGLEnd();
return -9;
}
VGLTextSetFontFile(NULL);
VGLClear(VGLDisplay, 0);
return 0;
}
void
vgaclear(void)
{
VGLClear(sVGLDisplay, 0);
VGLClear(VGLDisplay, 0);
}
