progs/fbdev/glfbdevtest.c

   1 /*
   2  * Test the GLFBDev interface.   Only tested with radeonfb driver!!!!
   3  *
   4  * Written by Brian Paul
   5  */
   6
   7
   8 #include <assert.h>
   9 #include <errno.h>
  10 #include <signal.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <fcntl.h>
  15 #include <unistd.h>
  16 #include <sys/ioctl.h>
  17 #include <sys/mman.h>
  18 #include <sys/types.h>
  19 #include <linux/fb.h>
  20 #include <linux/kd.h>
  21 #include <linux/vt.h>
  22 #include <GL/gl.h>
  23 #include <GL/glfbdev.h>
  24 #include <math.h>
  25
  26
  27 /**
  28  * Choose one of these modes
  29  */
  30 /*static const int XRes = 1280, YRes = 1024, Hz = 75;*/
  31 /*static const int XRes = 1280, YRes = 1024, Hz = 70;*/
  32 /*static const int XRes = 1280, YRes = 1024, Hz = 60;*/
  33 static const int XRes = 1024, YRes = 768, Hz = 70;
  34
  35 static int DesiredDepth = 32;
  36
  37 static int NumFrames = 100;
  38
  39 static struct fb_fix_screeninfo FixedInfo;
  40 static struct fb_var_screeninfo VarInfo, OrigVarInfo;
  41 static int OriginalVT = -1;
  42 static int ConsoleFD = -1;
  43 static int FrameBufferFD = -1;
  44 static caddr_t FrameBuffer = (caddr_t) -1;
  45 static caddr_t MMIOAddress = (caddr_t) -1;
  46
  47
  48 static void
  49 print_fixed_info(const struct fb_fix_screeninfo *fixed, const char *s)
  50 {
  51    static const char *visuals[] = {
  52       "MONO01", "MONO10", "TRUECOLOR", "PSEUDOCOLOR",
  53       "DIRECTCOLOR", "STATIC_PSEUDOCOLOR"
  54    };
  55
  56    printf("%s info -----------------------\n", s);
  57    printf("id = %16s\n", fixed->id);
  58    printf("smem_start = 0x%lx\n", fixed->smem_start);
  59    printf("smem_len = %d (0x%x)\n", fixed->smem_len, fixed->smem_len);
  60    printf("type = 0x%x\n", fixed->type);
  61    printf("type_aux = 0x%x\n", fixed->type_aux);
  62    printf("visual = 0x%x (%s)\n", fixed->visual, visuals[fixed->visual]);
  63    printf("xpanstep = %d\n", fixed->xpanstep);
  64    printf("ypanstep = %d\n", fixed->ypanstep);
  65    printf("ywrapstep = %d\n", fixed->ywrapstep);
  66    printf("line_length = %d\n", fixed->line_length);
  67    printf("mmio_start = 0x%lx\n", fixed->mmio_start);
  68    printf("mmio_len = %d (0x%x)\n", fixed->mmio_len, fixed->mmio_len);
  69    printf("accel = 0x%x\n", fixed->accel);
  70 }
  71
  72
  73 static void
  74 print_var_info(const struct fb_var_screeninfo *var, const char *s)
  75 {
  76    printf("%s info -----------------------\n", s);
  77    printf("xres = %d\n", var->xres);
  78    printf("yres = %d\n", var->yres);
  79    printf("xres_virtual = %d\n", var->xres_virtual);
  80    printf("yres_virtual = %d\n", var->yres_virtual);
  81    printf("xoffset = %d\n", var->xoffset);
  82    printf("yoffset = %d\n", var->yoffset);
  83    printf("bits_per_pixel = %d\n", var->bits_per_pixel);
  84    printf("grayscale = %d\n", var->grayscale);
  85
  86    printf("red.offset = %d  length = %d  msb_right = %d\n",
  87           var->red.offset, var->red.length, var->red.msb_right);
  88    printf("green.offset = %d  length = %d  msb_right = %d\n",
  89           var->green.offset, var->green.length, var->green.msb_right);
  90    printf("blue.offset = %d  length = %d  msb_right = %d\n",
  91           var->blue.offset, var->blue.length, var->blue.msb_right);
  92    printf("transp.offset = %d  length = %d  msb_right = %d\n",
  93           var->transp.offset, var->transp.length, var->transp.msb_right);
  94
  95    printf("nonstd = %d\n", var->nonstd);
  96    printf("activate = %d\n", var->activate);
  97    printf("height = %d mm\n", var->height);
  98    printf("width = %d mm\n", var->width);
  99    printf("accel_flags = 0x%x\n", var->accel_flags);
 100    printf("pixclock = %d\n", var->pixclock);
 101    printf("left_margin = %d\n", var->left_margin);
 102    printf("right_margin = %d\n", var->right_margin);
 103    printf("upper_margin = %d\n", var->upper_margin);
 104    printf("lower_margin = %d\n", var->lower_margin);
 105    printf("hsync_len = %d\n", var->hsync_len);
 106    printf("vsync_len = %d\n", var->vsync_len);
 107    printf("sync = %d\n", var->sync);
 108    printf("vmode = %d\n", var->vmode);
 109 }
 110
 111
 112 static void
 113 signal_handler(int signumber)
 114 {
 115    signal(signumber, SIG_IGN); /* prevent recursion! */
 116    fprintf(stderr, "error: got signal %d (exiting)\n", signumber);
 117    exit(1);
 118 }
 119
 120
 121 static void
 122 initialize_fbdev( void )
 123 {
 124    char ttystr[1000];
 125    int fd, vtnumber, ttyfd;
 126    int sz;
 127
 128    (void) sz;
 129
 130    if (geteuid()) {
 131       fprintf(stderr, "error: you need to be root\n");
 132       exit(1);
 133    }
 134
 135 #if 1
 136    /* open the framebuffer device */
 137    FrameBufferFD = open("/dev/fb0", O_RDWR);
 138    if (FrameBufferFD < 0) {
 139       fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
 140       exit(1);
 141    }
 142 #endif
 143
 144    /* open /dev/tty0 and get the vt number */
 145    if ((fd = open("/dev/tty0", O_WRONLY, 0)) < 0) {
 146       fprintf(stderr, "error opening /dev/tty0\n");
 147       exit(1);
 148    }
 149    if (ioctl(fd, VT_OPENQRY, &vtnumber) < 0 || vtnumber < 0) {
 150       fprintf(stderr, "error: couldn't get a free vt\n");
 151       exit(1);
 152    }
 153    close(fd);
 154
 155    /* open the console tty */
 156    sprintf(ttystr, "/dev/tty%d", vtnumber);  /* /dev/tty1-64 */
 157    ConsoleFD = open(ttystr, O_RDWR | O_NDELAY, 0);
 158    if (ConsoleFD < 0) {
 159       fprintf(stderr, "error couldn't open console fd\n");
 160       exit(1);
 161    }
 162
 163    /* save current vt number */
 164    {
 165       struct vt_stat vts;
 166       if (ioctl(ConsoleFD, VT_GETSTATE, &vts) == 0)
 167          OriginalVT = vts.v_active;
 168    }
 169
 170    /* disconnect from controlling tty */
 171    ttyfd = open("/dev/tty", O_RDWR);
 172    if (ttyfd >= 0) {
 173       ioctl(ttyfd, TIOCNOTTY, 0);
 174       close(ttyfd);
 175    }
 176
 177    /* some magic to restore the vt when we exit */
 178    {
 179       struct vt_mode vt;
 180       if (ioctl(ConsoleFD, VT_ACTIVATE, vtnumber) != 0)
 181          printf("ioctl VT_ACTIVATE: %s\n", strerror(errno));
 182       if (ioctl(ConsoleFD, VT_WAITACTIVE, vtnumber) != 0)
 183          printf("ioctl VT_WAITACTIVE: %s\n", strerror(errno));
 184
 185       if (ioctl(ConsoleFD, VT_GETMODE, &vt) < 0) {
 186          fprintf(stderr, "error: ioctl VT_GETMODE: %s\n", strerror(errno));
 187          exit(1);
 188       }
 189
 190       vt.mode = VT_PROCESS;
 191       vt.relsig = SIGUSR1;
 192       vt.acqsig = SIGUSR1;
 193       if (ioctl(ConsoleFD, VT_SETMODE, &vt) < 0) {
 194          fprintf(stderr, "error: ioctl(VT_SETMODE) failed: %s\n",
 195                  strerror(errno));
 196          exit(1);
 197       }
 198    }
 199
 200    /* go into graphics mode */
 201    if (ioctl(ConsoleFD, KDSETMODE, KD_GRAPHICS) < 0) {
 202       fprintf(stderr, "error: ioctl(KDSETMODE, KD_GRAPHICS) failed: %s\n",
 203               strerror(errno));
 204       exit(1);
 205    }
 206
 207
 208 #if 0
 209    /* open the framebuffer device */
 210    FrameBufferFD = open("/dev/fb0", O_RDWR);
 211    if (FrameBufferFD < 0) {
 212       fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
 213       exit(1);
 214    }
 215 #endif
 216
 217    /* Get the fixed screen info */
 218    if (ioctl(FrameBufferFD, FBIOGET_FSCREENINFO, &FixedInfo)) {
 219       fprintf(stderr, "error: ioctl(FBIOGET_FSCREENINFO) failed: %s\n",
 220               strerror(errno));
 221       exit(1);
 222    }
 223
 224    print_fixed_info(&FixedInfo, "Fixed");
 225
 226
 227   /* get the variable screen info */
 228    if (ioctl(FrameBufferFD, FBIOGET_VSCREENINFO, &OrigVarInfo)) {
 229       fprintf(stderr, "error: ioctl(FBIOGET_VSCREENINFO) failed: %s\n",
 230               strerror(errno));
 231       exit(1);
 232    }
 233
 234    print_var_info(&OrigVarInfo, "Orig Var");
 235
 236    /* operate on a copy */
 237    VarInfo = OrigVarInfo;
 238
 239    /* set the depth, resolution, etc */
 240    if (DesiredDepth)
 241       VarInfo.bits_per_pixel = DesiredDepth;
 242
 243    if (VarInfo.bits_per_pixel == 16) {
 244       VarInfo.red.offset = 11;
 245       VarInfo.green.offset = 5;
 246       VarInfo.blue.offset = 0;
 247       VarInfo.red.length = 5;
 248       VarInfo.green.length = 6;
 249       VarInfo.blue.length = 5;
 250       VarInfo.transp.offset = 0;
 251       VarInfo.transp.length = 0;
 252    }
 253    else if (VarInfo.bits_per_pixel == 32) {
 254       VarInfo.red.offset = 16;
 255       VarInfo.green.offset = 8;
 256       VarInfo.blue.offset = 0;
 257       VarInfo.transp.offset = 24;
 258       VarInfo.red.length = 8;
 259       VarInfo.green.length = 8;
 260       VarInfo.blue.length = 8;
 261       VarInfo.transp.length = 8;
 262    }
 263
 264    /* timing values taken from /etc/fb.modes */
 265    if (XRes == 1280 && YRes == 1024) {
 266       VarInfo.xres_virtual = VarInfo.xres = XRes;
 267       VarInfo.yres_virtual = VarInfo.yres = YRes;
 268       if (Hz == 75) {
 269          VarInfo.pixclock = 7408;
 270          VarInfo.left_margin = 248;
 271          VarInfo.right_margin = 16;
 272          VarInfo.upper_margin = 38;
 273          VarInfo.lower_margin = 1;
 274          VarInfo.hsync_len = 144;
 275          VarInfo.vsync_len = 3;
 276       }
 277       else if (Hz == 70) {
 278          VarInfo.pixclock = 7937;
 279          VarInfo.left_margin = 216;
 280          VarInfo.right_margin = 80;
 281          VarInfo.upper_margin = 36;
 282          VarInfo.lower_margin = 1;
 283          VarInfo.hsync_len = 112;
 284          VarInfo.vsync_len = 5;
 285       }
 286       else if (Hz == 60) {
 287          VarInfo.pixclock = 9260;
 288          VarInfo.left_margin = 248;
 289          VarInfo.right_margin = 48;
 290          VarInfo.upper_margin = 38;
 291          VarInfo.lower_margin = 1;
 292          VarInfo.hsync_len = 112;
 293          VarInfo.vsync_len = 3;
 294       }
 295       else {
 296          fprintf(stderr, "invalid rate for 1280x1024\n");
 297          exit(1);
 298       }
 299    }
 300    else if (XRes == 1024 && YRes == 768 && Hz == 70) {
 301       VarInfo.xres_virtual = VarInfo.xres = XRes;
 302       VarInfo.yres_virtual = VarInfo.yres = YRes;
 303       if (Hz == 70) {
 304          VarInfo.pixclock = 13334;
 305          VarInfo.left_margin = 144;
 306          VarInfo.right_margin = 24;
 307          VarInfo.upper_margin = 29;
 308          VarInfo.lower_margin = 3;
 309          VarInfo.hsync_len = 136;
 310          VarInfo.vsync_len = 6;
 311       }
 312       else {
 313          fprintf(stderr, "invalid rate for 1024x768\n");
 314          exit(1);
 315       }
 316    }
 317
 318    VarInfo.xoffset = 0;
 319    VarInfo.yoffset = 0;
 320    VarInfo.nonstd = 0;
 321    VarInfo.vmode &= ~FB_VMODE_YWRAP; /* turn off scrolling */
 322
 323    /* set new variable screen info */
 324    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo)) {
 325       fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 326               strerror(errno));
 327       exit(1);
 328    }
 329
 330    print_var_info(&VarInfo, "New Var");
 331
 332    if (FixedInfo.visual != FB_VISUAL_TRUECOLOR &&
 333        FixedInfo.visual != FB_VISUAL_DIRECTCOLOR) {
 334       fprintf(stderr, "non-TRUE/DIRECT-COLOR visuals (0x%x) not supported by this demo.\n", FixedInfo.visual);
 335       exit(1);
 336    }
 337
 338    /* initialize colormap */
 339    if (FixedInfo.visual == FB_VISUAL_DIRECTCOLOR) {
 340       struct fb_cmap cmap;
 341       unsigned short red[256], green[256], blue[256];
 342       int i;
 343
 344       /* we're assuming 256 entries here */
 345       printf("initializing directcolor colormap\n");
 346       cmap.start = 0;
 347       cmap.len = 256;
 348       cmap.red   = red;
 349       cmap.green = green;
 350       cmap.blue  = blue;
 351       cmap.transp = NULL;
 352       for (i = 0; i < cmap.len; i++) {
 353          red[i] = green[i] = blue[i] = (i << 8) | i;
 354       }
 355       if (ioctl(FrameBufferFD, FBIOPUTCMAP, (void *) &cmap) < 0) {
 356          fprintf(stderr, "ioctl(FBIOPUTCMAP) failed [%d]\n", i);
 357       }
 358    }
 359
 360    /*
 361     * fbdev says the frame buffer is at offset zero, and the mmio region
 362     * is immediately after.
 363     */
 364
 365    /* mmap the framebuffer into our address space */
 366    FrameBuffer = (caddr_t) mmap(0, /* start */
 367                                 FixedInfo.smem_len, /* bytes */
 368                                 PROT_READ | PROT_WRITE, /* prot */
 369                                 MAP_SHARED, /* flags */
 370                                 FrameBufferFD, /* fd */
 371                                 0 /* offset */);
 372    if (FrameBuffer == (caddr_t) - 1) {
 373       fprintf(stderr, "error: unable to mmap framebuffer: %s\n",
 374               strerror(errno));
 375       exit(1);
 376    }
 377    printf("FrameBuffer = %p\n", FrameBuffer);
 378
 379 #if 1
 380    /* mmap the MMIO region into our address space */
 381    MMIOAddress = (caddr_t) mmap(0, /* start */
 382                                 FixedInfo.mmio_len, /* bytes */
 383                                 PROT_READ | PROT_WRITE, /* prot */
 384                                 MAP_SHARED, /* flags */
 385                                 FrameBufferFD, /* fd */
 386                                 FixedInfo.smem_len /* offset */);
 387    if (MMIOAddress == (caddr_t) - 1) {
 388       fprintf(stderr, "error: unable to mmap mmio region: %s\n",
 389               strerror(errno));
 390    }
 391    printf("MMIOAddress = %p\n", MMIOAddress);
 392
 393    /* try out some simple MMIO register reads */
 394    if (0)
 395    {
 396       typedef unsigned int CARD32;
 397       typedef unsigned char CARD8;
 398 #define RADEON_CONFIG_MEMSIZE               0x00f8
 399 #define RADEON_MEM_SDRAM_MODE_REG           0x0158
 400 #define MMIO_IN32(base, offset) \
 401         *(volatile CARD32 *)(void *)(((CARD8*)(base)) + (offset))
 402 #define INREG(addr)         MMIO_IN32(MMIOAddress, addr)
 403       int sz, type;
 404       const char *typeStr[] = {"SDR", "DDR", "64-bit SDR"};
 405       sz = INREG(RADEON_CONFIG_MEMSIZE);
 406       type = INREG(RADEON_MEM_SDRAM_MODE_REG);
 407       printf("RADEON_CONFIG_MEMSIZE = %d (%d MB)\n", sz, sz / 1024 / 1024);
 408       printf("RADEON_MEM_SDRAM_MODE_REG >> 30 = %d (%s)\n",
 409              type >> 30, typeStr[type>>30]);
 410    }
 411 #endif
 412
 413 }
 414
 415
 416 static void
 417 shutdown_fbdev( void )
 418 {
 419    struct vt_mode VT;
 420
 421    printf("cleaning up...\n");
 422    /* restore original variable screen info */
 423    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &OrigVarInfo)) {
 424       fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 425               strerror(errno));
 426       exit(1);
 427    }
 428
 429    munmap(MMIOAddress, FixedInfo.mmio_len);
 430    munmap(FrameBuffer, FixedInfo.smem_len);
 431    close(FrameBufferFD);
 432
 433    /* restore text mode */
 434    ioctl(ConsoleFD, KDSETMODE, KD_TEXT);
 435
 436    /* set vt */
 437    if (ioctl(ConsoleFD, VT_GETMODE, &VT) != -1) {
 438       VT.mode = VT_AUTO;
 439       ioctl(ConsoleFD, VT_SETMODE, &VT);
 440    }
 441
 442    /* restore original vt */
 443    if (OriginalVT >= 0) {
 444       ioctl(ConsoleFD, VT_ACTIVATE, OriginalVT);
 445       OriginalVT = -1;
 446    }
 447
 448    close(ConsoleFD);
 449 }
 450
 451
 452 /* Borrowed from GLUT */
 453 static void
 454 doughnut(GLfloat r, GLfloat R, GLint nsides, GLint rings)
 455 {
 456   int i, j;
 457   GLfloat theta, phi, theta1;
 458   GLfloat cosTheta, sinTheta;
 459   GLfloat cosTheta1, sinTheta1;
 460   GLfloat ringDelta, sideDelta;
 461
 462   ringDelta = 2.0 * M_PI / rings;
 463   sideDelta = 2.0 * M_PI / nsides;
 464
 465   theta = 0.0;
 466   cosTheta = 1.0;
 467   sinTheta = 0.0;
 468   for (i = rings - 1; i >= 0; i--) {
 469     theta1 = theta + ringDelta;
 470     cosTheta1 = cos(theta1);
 471     sinTheta1 = sin(theta1);
 472     glBegin(GL_QUAD_STRIP);
 473     phi = 0.0;
 474     for (j = nsides; j >= 0; j--) {
 475       GLfloat cosPhi, sinPhi, dist;
 476
 477       phi += sideDelta;
 478       cosPhi = cos(phi);
 479       sinPhi = sin(phi);
 480       dist = R + r * cosPhi;
 481
 482       glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
 483       glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi);
 484       glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
 485       glVertex3f(cosTheta * dist, -sinTheta * dist,  r * sinPhi);
 486     }
 487     glEnd();
 488     theta = theta1;
 489     cosTheta = cosTheta1;
 490     sinTheta = sinTheta1;
 491   }
 492 }
 493
 494
 495 static void
 496 gltest( void )
 497 {
 498    static const int attribs[] = {
 499       GLFBDEV_DOUBLE_BUFFER,
 500       GLFBDEV_DEPTH_SIZE, 16,
 501       GLFBDEV_NONE
 502    };
 503    GLFBDevContextPtr ctx;
 504    GLFBDevBufferPtr buf;
 505    GLFBDevVisualPtr vis;
 506    int bytes, r, g, b, a;
 507    float ang;
 508    int i;
 509
 510    printf("GLFBDEV_VENDOR = %s\n", glFBDevGetString(GLFBDEV_VENDOR));
 511    printf("GLFBDEV_VERSION = %s\n", glFBDevGetString(GLFBDEV_VERSION));
 512
 513    /* framebuffer size */
 514    bytes = VarInfo.xres_virtual * VarInfo.yres_virtual * VarInfo.bits_per_pixel / 8;
 515
 516    vis = glFBDevCreateVisual( &FixedInfo, &VarInfo, attribs );
 517    assert(vis);
 518
 519    buf = glFBDevCreateBuffer( &FixedInfo, &VarInfo, vis, FrameBuffer, NULL, bytes );
 520    assert(buf);
 521
 522    ctx = glFBDevCreateContext( vis, NULL );
 523    assert(buf);
 524
 525    b = glFBDevMakeCurrent( ctx, buf, buf );
 526    assert(b);
 527
 528    /*printf("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));*/
 529    glGetIntegerv(GL_RED_BITS, &r);
 530    glGetIntegerv(GL_GREEN_BITS, &g);
 531    glGetIntegerv(GL_BLUE_BITS, &b);
 532    glGetIntegerv(GL_ALPHA_BITS, &a);
 533    printf("RED_BITS=%d GREEN_BITS=%d BLUE_BITS=%d ALPHA_BITS=%d\n",
 534           r, g, b, a);
 535
 536    glClearColor(0.5, 0.5, 1.0, 0);
 537    glMatrixMode(GL_PROJECTION);
 538    glLoadIdentity();
 539    glFrustum(-1, 1, -1, 1, 2, 30);
 540    glMatrixMode(GL_MODELVIEW);
 541    glLoadIdentity();
 542    glTranslatef(0, 0, -15);
 543    glViewport(0, 0, VarInfo.xres_virtual, VarInfo.yres_virtual);
 544    glEnable(GL_LIGHTING);
 545    glEnable(GL_LIGHT0);
 546    glEnable(GL_DEPTH_TEST);
 547
 548    printf("Drawing %d frames...\n", NumFrames);
 549
 550    ang = 0.0;
 551    for (i = 0; i < NumFrames; i++) {
 552       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 553       glPushMatrix();
 554       glRotatef(ang, 1, 0, 0);
 555       doughnut(1, 3, 40, 20);
 556       glPopMatrix();
 557       glFBDevSwapBuffers(buf);
 558       ang += 15.0;
 559    }
 560
 561    /* clean up */
 562    b = glFBDevMakeCurrent( NULL, NULL, NULL);
 563    assert(b);
 564
 565    glFBDevDestroyContext(ctx);
 566    glFBDevDestroyBuffer(buf);
 567    glFBDevDestroyVisual(vis);
 568 }
 569
 570
 571 static void
 572 parse_args(int argc, char *argv[])
 573 {
 574    int i;
 575
 576    for (i = 1; i < argc; i++) {
 577       if (strcmp(argv[i], "-f") == 0) {
 578          NumFrames = atoi(argv[i+1]);
 579          i++;
 580       }
 581    }
 582 }
 583
 584
 585 int
 586 main( int argc, char *argv[] )
 587 {
 588    signal(SIGUSR1, signal_handler);  /* exit if someone tries a vt switch */
 589    signal(SIGSEGV, signal_handler);  /* catch segfaults */
 590
 591    parse_args(argc, argv);
 592
 593    printf("Setting mode to %d x %d @ %d Hz, %d bpp\n", XRes, YRes, Hz, DesiredDepth);
 594    initialize_fbdev();
 595    gltest();
 596    shutdown_fbdev();
 597
 598    return 0;
 599 }