progs/miniglx/glfbdevtest.c

   1 /* $Id: glfbdevtest.c,v 1.1 2003/08/06 17:47:15 keithw Exp $ */
   2
   3 /*
   4  * Test the GLFBDev interface.   Only tested with radeonfb driver!!!!
   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/glut.h>
  23 #include "GL/glfbdev.h"
  24
  25 #define DEFAULT_DEPTH 8
  26
  27 static struct fb_fix_screeninfo FixedInfo;
  28 static struct fb_var_screeninfo VarInfo, OrigVarInfo;
  29 static int DesiredDepth = 0;
  30 static int OriginalVT = -1;
  31 static int ConsoleFD = -1;
  32 static int FrameBufferFD = -1;
  33 static caddr_t FrameBuffer = (caddr_t) -1;
  34 static caddr_t MMIOAddress = (caddr_t) -1;
  35
  36
  37 static void
  38 print_fixed_info(const struct fb_fix_screeninfo *fixed, const char *s)
  39 {
  40    static const char *visuals[] = {
  41       "MONO01", "MONO10", "TRUECOLOR", "PSEUDOCOLOR",
  42       "DIRECTCOLOR", "STATIC_PSEUDOCOLOR"
  43    };
  44
  45    printf("%s info -----------------------\n", s);
  46    printf("id = %16s\n", fixed->id);
  47    printf("smem_start = 0x%x\n", fixed->smem_start);
  48    printf("smem_len = %d (0x%x)\n", fixed->smem_len, fixed->smem_len);
  49    printf("type = 0x%x\n", fixed->type);
  50    printf("type_aux = 0x%x\n", fixed->type_aux);
  51    printf("visual = 0x%x (%s)\n", fixed->visual, visuals[fixed->visual]);
  52    printf("xpanstep = %d\n", fixed->xpanstep);
  53    printf("ypanstep = %d\n", fixed->ypanstep);
  54    printf("ywrapstep = %d\n", fixed->ywrapstep);
  55    printf("line_length = %d\n", fixed->line_length);
  56    printf("mmio_start = 0x%x\n", fixed->mmio_start);
  57    printf("mmio_len = %d (0x%x)\n", fixed->mmio_len, fixed->mmio_len);
  58    printf("accel = 0x%x\n", fixed->accel);
  59 }
  60
  61
  62 static void
  63 print_var_info(const struct fb_var_screeninfo *var, const char *s)
  64 {
  65    printf("%s info -----------------------\n", s);
  66    printf("xres = %d\n", var->xres);
  67    printf("yres = %d\n", var->yres);
  68    printf("xres_virtual = %d\n", var->xres_virtual);
  69    printf("yres_virtual = %d\n", var->yres_virtual);
  70    printf("xoffset = %d\n", var->xoffset);
  71    printf("yoffset = %d\n", var->yoffset);
  72    printf("bits_per_pixel = %d\n", var->bits_per_pixel);
  73    printf("grayscale = %d\n", var->grayscale);
  74
  75    printf("red.offset = %d  length = %d  msb_right = %d\n",
  76           var->red.offset, var->red.length, var->red.msb_right);
  77    printf("green.offset = %d  length = %d  msb_right = %d\n",
  78           var->green.offset, var->green.length, var->green.msb_right);
  79    printf("blue.offset = %d  length = %d  msb_right = %d\n",
  80           var->blue.offset, var->blue.length, var->blue.msb_right);
  81    printf("transp.offset = %d  length = %d  msb_right = %d\n",
  82           var->transp.offset, var->transp.length, var->transp.msb_right);
  83
  84    printf("nonstd = %d\n", var->nonstd);
  85    printf("activate = %d\n", var->activate);
  86    printf("height = %d mm\n", var->height);
  87    printf("width = %d mm\n", var->width);
  88    printf("accel_flags = 0x%x\n", var->accel_flags);
  89    printf("pixclock = %d\n", var->pixclock);
  90    printf("left_margin = %d\n", var->left_margin);
  91    printf("right_margin = %d\n", var->right_margin);
  92    printf("upper_margin = %d\n", var->upper_margin);
  93    printf("lower_margin = %d\n", var->lower_margin);
  94    printf("hsync_len = %d\n", var->hsync_len);
  95    printf("vsync_len = %d\n", var->vsync_len);
  96    printf("sync = %d\n", var->sync);
  97    printf("vmode = %d\n", var->vmode);
  98 }
  99
 100
 101 static void
 102 signal_handler(int signumber)
 103 {
 104    signal(signumber, SIG_IGN); /* prevent recursion! */
 105    fprintf(stderr, "error: got signal %d (exiting)\n", signumber);
 106    exit(1);
 107 }
 108
 109
 110 static void
 111 initialize_fbdev( void )
 112 {
 113    char ttystr[1000];
 114    int fd, vtnumber, ttyfd;
 115    int sz;
 116
 117    if (geteuid()) {
 118       fprintf(stderr, "error: you need to be root\n");
 119       exit(1);
 120    }
 121
 122 #if 1
 123    /* open the framebuffer device */
 124    FrameBufferFD = open("/dev/fb0", O_RDWR);
 125    if (FrameBufferFD < 0) {
 126       fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
 127       exit(1);
 128    }
 129 #endif
 130
 131    /* open /dev/tty0 and get the vt number */
 132    if ((fd = open("/dev/tty0", O_WRONLY, 0)) < 0) {
 133       fprintf(stderr, "error opening /dev/tty0\n");
 134       exit(1);
 135    }
 136    if (ioctl(fd, VT_OPENQRY, &vtnumber) < 0 || vtnumber < 0) {
 137       fprintf(stderr, "error: couldn't get a free vt\n");
 138       exit(1);
 139    }
 140    close(fd);
 141
 142    /* open the console tty */
 143    sprintf(ttystr, "/dev/tty%d", vtnumber);  /* /dev/tty1-64 */
 144    ConsoleFD = open(ttystr, O_RDWR | O_NDELAY, 0);
 145    if (ConsoleFD < 0) {
 146       fprintf(stderr, "error couldn't open console fd\n");
 147       exit(1);
 148    }
 149
 150    /* save current vt number */
 151    {
 152       struct vt_stat vts;
 153       if (ioctl(ConsoleFD, VT_GETSTATE, &vts) == 0)
 154          OriginalVT = vts.v_active;
 155    }
 156
 157    /* disconnect from controlling tty */
 158    ttyfd = open("/dev/tty", O_RDWR);
 159    if (ttyfd >= 0) {
 160       ioctl(ttyfd, TIOCNOTTY, 0);
 161       close(ttyfd);
 162    }
 163
 164    /* some magic to restore the vt when we exit */
 165    {
 166       struct vt_mode vt;
 167       if (ioctl(ConsoleFD, VT_ACTIVATE, vtnumber) != 0)
 168          printf("ioctl VT_ACTIVATE: %s\n", strerror(errno));
 169       if (ioctl(ConsoleFD, VT_WAITACTIVE, vtnumber) != 0)
 170          printf("ioctl VT_WAITACTIVE: %s\n", strerror(errno));
 171
 172       if (ioctl(ConsoleFD, VT_GETMODE, &vt) < 0) {
 173          fprintf(stderr, "error: ioctl VT_GETMODE: %s\n", strerror(errno));
 174          exit(1);
 175       }
 176
 177       vt.mode = VT_PROCESS;
 178       vt.relsig = SIGUSR1;
 179       vt.acqsig = SIGUSR1;
 180       if (ioctl(ConsoleFD, VT_SETMODE, &vt) < 0) {
 181          fprintf(stderr, "error: ioctl(VT_SETMODE) failed: %s\n",
 182                  strerror(errno));
 183          exit(1);
 184       }
 185    }
 186
 187    /* go into graphics mode */
 188    if (ioctl(ConsoleFD, KDSETMODE, KD_GRAPHICS) < 0) {
 189       fprintf(stderr, "error: ioctl(KDSETMODE, KD_GRAPHICS) failed: %s\n",
 190               strerror(errno));
 191       exit(1);
 192    }
 193
 194
 195 #if 0
 196    /* open the framebuffer device */
 197    FrameBufferFD = open("/dev/fb0", O_RDWR);
 198    if (FrameBufferFD < 0) {
 199       fprintf(stderr, "Error opening /dev/fb0: %s\n", strerror(errno));
 200       exit(1);
 201    }
 202 #endif
 203
 204    /* Get the fixed screen info */
 205    if (ioctl(FrameBufferFD, FBIOGET_FSCREENINFO, &FixedInfo)) {
 206       fprintf(stderr, "error: ioctl(FBIOGET_FSCREENINFO) failed: %s\n",
 207               strerror(errno));
 208       exit(1);
 209    }
 210
 211    print_fixed_info(&FixedInfo, "Fixed");
 212
 213
 214   /* get the variable screen info */
 215    if (ioctl(FrameBufferFD, FBIOGET_VSCREENINFO, &OrigVarInfo)) {
 216       fprintf(stderr, "error: ioctl(FBIOGET_VSCREENINFO) failed: %s\n",
 217               strerror(errno));
 218       exit(1);
 219    }
 220
 221    print_var_info(&OrigVarInfo, "Orig Var");
 222
 223    /* operate on a copy */
 224    VarInfo = OrigVarInfo;
 225
 226    /* set the depth, resolution, etc */
 227    DesiredDepth = 32;
 228    if (DesiredDepth)
 229       VarInfo.bits_per_pixel = DesiredDepth;
 230
 231    if (VarInfo.bits_per_pixel == 16) {
 232       VarInfo.red.offset = 11;
 233       VarInfo.green.offset = 5;
 234       VarInfo.blue.offset = 0;
 235       VarInfo.red.length = 5;
 236       VarInfo.green.length = 6;
 237       VarInfo.blue.length = 5;
 238       VarInfo.transp.offset = 0;
 239       VarInfo.transp.length = 0;
 240    }
 241    else if (VarInfo.bits_per_pixel == 32) {
 242       VarInfo.red.offset = 16;
 243       VarInfo.green.offset = 8;
 244       VarInfo.blue.offset = 0;
 245       VarInfo.transp.offset = 24;
 246       VarInfo.red.length = 8;
 247       VarInfo.green.length = 8;
 248       VarInfo.blue.length = 8;
 249       VarInfo.transp.length = 8;
 250    }
 251    /* timing values taken from /etc/fb.modes (1280x1024 @ 75Hz) */
 252    VarInfo.xres_virtual = VarInfo.xres = 1280;
 253    VarInfo.yres_virtual = VarInfo.yres = 1024;
 254    VarInfo.pixclock = 7408;
 255    VarInfo.left_margin = 248;
 256    VarInfo.right_margin = 16;
 257    VarInfo.upper_margin = 38;
 258    VarInfo.lower_margin = 1;
 259    VarInfo.hsync_len = 144;
 260    VarInfo.vsync_len = 3;
 261
 262    VarInfo.xoffset = 0;
 263    VarInfo.yoffset = 0;
 264    VarInfo.nonstd = 0;
 265    VarInfo.vmode &= ~FB_VMODE_YWRAP; /* turn off scrolling */
 266
 267    /* set new variable screen info */
 268    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo)) {
 269       fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 270               strerror(errno));
 271       exit(1);
 272    }
 273
 274    print_var_info(&VarInfo, "New Var");
 275
 276    if (FixedInfo.visual != FB_VISUAL_TRUECOLOR &&
 277        FixedInfo.visual != FB_VISUAL_DIRECTCOLOR) {
 278       fprintf(stderr, "non-TRUE/DIRECT-COLOR visuals (0x%x) not supported by this demo.\n", FixedInfo.visual);
 279       exit(1);
 280    }
 281
 282    /* initialize colormap */
 283    if (FixedInfo.visual == FB_VISUAL_DIRECTCOLOR) {
 284       struct fb_cmap cmap;
 285       unsigned short red[256], green[256], blue[256];
 286       int i;
 287
 288       /* we're assuming 256 entries here */
 289       printf("initializing directcolor colormap\n");
 290       cmap.start = 0;
 291       cmap.len = 256;
 292       cmap.red   = red;
 293       cmap.green = green;
 294       cmap.blue  = blue;
 295       cmap.transp = NULL;
 296       for (i = 0; i < cmap.len; i++) {
 297          red[i] = green[i] = blue[i] = (i << 8) | i;
 298       }
 299       if (ioctl(FrameBufferFD, FBIOPUTCMAP, (void *) &cmap) < 0) {
 300          fprintf(stderr, "ioctl(FBIOPUTCMAP) failed [%d]\n", i);
 301       }
 302    }
 303
 304    /*
 305     * fbdev says the frame buffer is at offset zero, and the mmio region
 306     * is immediately after.
 307     */
 308
 309    /* mmap the framebuffer into our address space */
 310    FrameBuffer = (caddr_t) mmap(0, /* start */
 311                                 FixedInfo.smem_len, /* bytes */
 312                                 PROT_READ | PROT_WRITE, /* prot */
 313                                 MAP_SHARED, /* flags */
 314                                 FrameBufferFD, /* fd */
 315                                 0 /* offset */);
 316    if (FrameBuffer == (caddr_t) - 1) {
 317       fprintf(stderr, "error: unable to mmap framebuffer: %s\n",
 318               strerror(errno));
 319       exit(1);
 320    }
 321    printf("FrameBuffer = %p\n", FrameBuffer);
 322
 323 #if 1
 324    /* mmap the MMIO region into our address space */
 325    MMIOAddress = (caddr_t) mmap(0, /* start */
 326                                 FixedInfo.mmio_len, /* bytes */
 327                                 PROT_READ | PROT_WRITE, /* prot */
 328                                 MAP_SHARED, /* flags */
 329                                 FrameBufferFD, /* fd */
 330                                 FixedInfo.smem_len /* offset */);
 331    if (MMIOAddress == (caddr_t) - 1) {
 332       fprintf(stderr, "error: unable to mmap mmio region: %s\n",
 333               strerror(errno));
 334    }
 335    printf("MMIOAddress = %p\n", MMIOAddress);
 336
 337    /* try out some simple MMIO register reads */
 338    if (1)
 339    {
 340       typedef unsigned int CARD32;
 341       typedef unsigned char CARD8;
 342 #define RADEON_CONFIG_MEMSIZE               0x00f8
 343 #define RADEON_MEM_SDRAM_MODE_REG           0x0158
 344 #define MMIO_IN32(base, offset) \
 345         *(volatile CARD32 *)(void *)(((CARD8*)(base)) + (offset))
 346 #define INREG(addr)         MMIO_IN32(MMIOAddress, addr)
 347       int sz, type;
 348       const char *typeStr[] = {"SDR", "DDR", "64-bit SDR"};
 349       sz = INREG(RADEON_CONFIG_MEMSIZE);
 350       type = INREG(RADEON_MEM_SDRAM_MODE_REG);
 351       printf("RADEON_CONFIG_MEMSIZE = %d (%d MB)\n", sz, sz / 1024 / 1024);
 352       printf("RADEON_MEM_SDRAM_MODE_REG >> 30 = %d (%s)\n",
 353              type >> 30, typeStr[type>>30]);
 354    }
 355 #endif
 356
 357 }
 358
 359
 360 static void
 361 shutdown_fbdev( void )
 362 {
 363    struct vt_mode VT;
 364
 365    printf("cleaning up...\n");
 366    /* restore original variable screen info */
 367    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &OrigVarInfo)) {
 368       fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 369               strerror(errno));
 370       exit(1);
 371    }
 372
 373    munmap(MMIOAddress, FixedInfo.mmio_len);
 374    munmap(FrameBuffer, FixedInfo.smem_len);
 375    close(FrameBufferFD);
 376
 377    /* restore text mode */
 378    ioctl(ConsoleFD, KDSETMODE, KD_TEXT);
 379
 380    /* set vt */
 381    if (ioctl(ConsoleFD, VT_GETMODE, &VT) != -1) {
 382       VT.mode = VT_AUTO;
 383       ioctl(ConsoleFD, VT_SETMODE, &VT);
 384    }
 385
 386    /* restore original vt */
 387    if (OriginalVT >= 0) {
 388       ioctl(ConsoleFD, VT_ACTIVATE, OriginalVT);
 389       OriginalVT = -1;
 390    }
 391
 392    close(ConsoleFD);
 393 }
 394
 395
 396 static void
 397 gltest( void )
 398 {
 399    static const int attribs[] = {
 400       GLFBDEV_DOUBLE_BUFFER,
 401       GLFBDEV_DEPTH_SIZE, 16,
 402       GLFBDEV_NONE
 403    };
 404    GLFBDevContextPtr ctx;
 405    GLFBDevBufferPtr buf;
 406    GLFBDevVisualPtr vis;
 407    int bytes, r, g, b, a;
 408    float ang;
 409
 410    printf("GLFBDEV_VENDOR = %s\n", glFBDevGetString(GLFBDEV_VENDOR));
 411    printf("GLFBDEV_VERSION = %s\n", glFBDevGetString(GLFBDEV_VERSION));
 412
 413    /* framebuffer size */
 414    bytes = VarInfo.xres_virtual * VarInfo.yres_virtual * VarInfo.bits_per_pixel / 8;
 415
 416    vis = glFBDevCreateVisual( &FixedInfo, &VarInfo, attribs );
 417    assert(vis);
 418
 419    buf = glFBDevCreateBuffer( &FixedInfo, &VarInfo, vis, FrameBuffer, NULL, bytes );
 420    assert(buf);
 421
 422    ctx = glFBDevCreateContext( vis, NULL );
 423    assert(buf);
 424
 425    b = glFBDevMakeCurrent( ctx, buf, buf );
 426    assert(b);
 427
 428    /*printf("GL_EXTENSIONS: %s\n", glGetString(GL_EXTENSIONS));*/
 429    glGetIntegerv(GL_RED_BITS, &r);
 430    glGetIntegerv(GL_GREEN_BITS, &g);
 431    glGetIntegerv(GL_BLUE_BITS, &b);
 432    glGetIntegerv(GL_ALPHA_BITS, &a);
 433    printf("RED_BITS=%d GREEN_BITS=%d BLUE_BITS=%d ALPHA_BITS=%d\n",
 434           r, g, b, a);
 435
 436    glClearColor(0.5, 0.5, 1.0, 0);
 437    glMatrixMode(GL_PROJECTION);
 438    glLoadIdentity();
 439    glFrustum(-1, 1, -1, 1, 2, 30);
 440    glMatrixMode(GL_MODELVIEW);
 441    glLoadIdentity();
 442    glTranslatef(0, 0, -15);
 443    glViewport(0, 0, VarInfo.xres_virtual, VarInfo.yres_virtual);
 444    glEnable(GL_LIGHTING);
 445    glEnable(GL_LIGHT0);
 446    glEnable(GL_DEPTH_TEST);
 447
 448    for (ang = 0; ang <= 180; ang += 15) {
 449       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 450       glPushMatrix();
 451       glRotatef(ang, 1, 0, 0);
 452       glutSolidTorus(1, 3, 40, 20);
 453       glPopMatrix();
 454       glFBDevSwapBuffers(buf);
 455    }
 456
 457    /* clean up */
 458    b = glFBDevMakeCurrent( NULL, NULL, NULL);
 459    assert(b);
 460
 461    glFBDevDestroyContext(ctx);
 462    glFBDevDestroyBuffer(buf);
 463    glFBDevDestroyVisual(vis);
 464 }
 465
 466
 467 int
 468 main( int argc, char *argv[] )
 469 {
 470    signal(SIGUSR1, signal_handler);  /* exit if someone tries a vt switch */
 471    signal(SIGSEGV, signal_handler);  /* catch segfaults */
 472
 473    initialize_fbdev();
 474    gltest();
 475    shutdown_fbdev();
 476
 477    return 0;
 478 }