src/mesa/drivers/dri/i965/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "glheader.h"
  29 #include "context.h"
  30 #include "framebuffer.h"
  31 #include "matrix.h"
  32 #include "renderbuffer.h"
  33 #include "simple_list.h"
  34 #include "utils.h"
  35 #include "vblank.h"
  36 #include "xmlpool.h"
  37
  38
  39 #include "intel_screen.h"
  40
  41 #include "intel_tex.h"
  42 #include "intel_span.h"
  43 #include "intel_ioctl.h"
  44
  45 #include "i830_dri.h"
  46
  47 PUBLIC const char __driConfigOptions[] =
  48 DRI_CONF_BEGIN
  49     DRI_CONF_SECTION_PERFORMANCE
  50        DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
  51        DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  52     DRI_CONF_SECTION_END
  53     DRI_CONF_SECTION_QUALITY
  54        DRI_CONF_FORCE_S3TC_ENABLE(false)
  55        DRI_CONF_ALLOW_LARGE_TEXTURES(1)
  56       DRI_CONF_SECTION_END
  57 DRI_CONF_END;
  58 const GLuint __driNConfigOptions = 4;
  59
  60 #ifdef USE_NEW_INTERFACE
  61 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  62 #endif /*USE_NEW_INTERFACE*/
  63
  64 extern const struct dri_extension card_extensions[];
  65
  66 /**
  67  * Map all the memory regions described by the screen.
  68  * \return GL_TRUE if success, GL_FALSE if error.
  69  */
  70 GLboolean
  71 intelMapScreenRegions(__DRIscreenPrivate *sPriv)
  72 {
  73    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
  74
  75    if (intelScreen->front.handle) {
  76       if (drmMap(sPriv->fd,
  77                  intelScreen->front.handle,
  78                  intelScreen->front.size,
  79                  (drmAddress *)&intelScreen->front.map) != 0) {
  80          _mesa_problem(NULL, "drmMap(frontbuffer) failed!");
  81          return GL_FALSE;
  82       }
  83    } else {
  84       /* Use the old static allocation method if the server isn't setting up
  85        * a movable handle for us.  Add in the front buffer offset from
  86        * framebuffer start, as our span routines (unlike other drivers) expect
  87        * the renderbuffer address to point to the beginning of the
  88        * renderbuffer.
  89        */
  90       intelScreen->front.map = (char *)sPriv->pFB;
  91       if (intelScreen->front.map == NULL) {
  92          fprintf(stderr, "Failed to find framebuffer mapping\n");
  93          return GL_FALSE;
  94       }
  95    }
  96
  97    if (drmMap(sPriv->fd,
  98               intelScreen->back.handle,
  99               intelScreen->back.size,
 100               (drmAddress *)&intelScreen->back.map) != 0) {
 101       intelUnmapScreenRegions(intelScreen);
 102       return GL_FALSE;
 103    }
 104
 105    if (drmMap(sPriv->fd,
 106               intelScreen->depth.handle,
 107               intelScreen->depth.size,
 108               (drmAddress *)&intelScreen->depth.map) != 0) {
 109       intelUnmapScreenRegions(intelScreen);
 110       return GL_FALSE;
 111    }
 112
 113    if (drmMap(sPriv->fd,
 114               intelScreen->tex.handle,
 115               intelScreen->tex.size,
 116               (drmAddress *)&intelScreen->tex.map) != 0) {
 117       intelUnmapScreenRegions(intelScreen);
 118       return GL_FALSE;
 119    }
 120
 121    if (0)
 122       printf("Mappings:  front: %p  back: %p  depth: %p  tex: %p\n",
 123           intelScreen->front.map,
 124           intelScreen->back.map,
 125           intelScreen->depth.map,
 126           intelScreen->tex.map);
 127    return GL_TRUE;
 128 }
 129
 130
 131 void
 132 intelUnmapScreenRegions(intelScreenPrivate *intelScreen)
 133 {
 134 #define REALLY_UNMAP 1
 135    /* If front.handle is present, we're doing the dynamic front buffer mapping,
 136     * but if we've fallen back to static allocation then we shouldn't try to
 137     * unmap here.
 138     */
 139    if (intelScreen->front.handle) {
 140 #if REALLY_UNMAP
 141       if (drmUnmap(intelScreen->front.map, intelScreen->front.size) != 0)
 142          printf("drmUnmap front failed!\n");
 143 #endif
 144       intelScreen->front.map = NULL;
 145    }
 146    if (intelScreen->back.map) {
 147 #if REALLY_UNMAP
 148       if (drmUnmap(intelScreen->back.map, intelScreen->back.size) != 0)
 149          printf("drmUnmap back failed!\n");
 150 #endif
 151       intelScreen->back.map = NULL;
 152    }
 153    if (intelScreen->depth.map) {
 154 #if REALLY_UNMAP
 155       drmUnmap(intelScreen->depth.map, intelScreen->depth.size);
 156       intelScreen->depth.map = NULL;
 157 #endif
 158    }
 159    if (intelScreen->tex.map) {
 160 #if REALLY_UNMAP
 161       drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
 162       intelScreen->tex.map = NULL;
 163 #endif
 164    }
 165 }
 166
 167
 168 static void
 169 intelPrintDRIInfo(intelScreenPrivate *intelScreen,
 170                   __DRIscreenPrivate *sPriv,
 171                   I830DRIPtr gDRIPriv)
 172 {
 173    fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
 174            intelScreen->front.size, intelScreen->front.offset,
 175            intelScreen->front.pitch);
 176    fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
 177            intelScreen->back.size, intelScreen->back.offset,
 178            intelScreen->back.pitch);
 179    fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
 180            intelScreen->depth.size, intelScreen->depth.offset,
 181            intelScreen->depth.pitch);
 182    fprintf(stderr, "*** Rotated size: 0x%x  offset: 0x%x  pitch: %d\n",
 183            intelScreen->rotated.size, intelScreen->rotated.offset,
 184            intelScreen->rotated.pitch);
 185    fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
 186            intelScreen->tex.size, intelScreen->tex.offset);
 187    fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
 188 }
 189
 190
 191 static void
 192 intelPrintSAREA(volatile drmI830Sarea *sarea)
 193 {
 194    fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width, sarea->height);
 195    fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
 196    fprintf(stderr,
 197            "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 198            sarea->front_offset, sarea->front_size,
 199            (unsigned) sarea->front_handle);
 200    fprintf(stderr,
 201            "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 202            sarea->back_offset, sarea->back_size,
 203            (unsigned) sarea->back_handle);
 204    fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 205            sarea->depth_offset, sarea->depth_size,
 206            (unsigned) sarea->depth_handle);
 207    fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 208            sarea->tex_offset, sarea->tex_size,
 209            (unsigned) sarea->tex_handle);
 210    fprintf(stderr, "SAREA: rotation: %d\n", sarea->rotation);
 211    fprintf(stderr,
 212            "SAREA: rotated offset: 0x%08x  size: 0x%x\n",
 213            sarea->rotated_offset, sarea->rotated_size);
 214    fprintf(stderr, "SAREA: rotated pitch: %d\n", sarea->rotated_pitch);
 215 }
 216
 217
 218 /**
 219  * A number of the screen parameters are obtained/computed from
 220  * information in the SAREA.  This function updates those parameters.
 221  */
 222 void
 223 intelUpdateScreenFromSAREA(intelScreenPrivate *intelScreen,
 224                            volatile drmI830Sarea *sarea)
 225 {
 226    intelScreen->width = sarea->width;
 227    intelScreen->height = sarea->height;
 228
 229    intelScreen->front.offset = sarea->front_offset;
 230    intelScreen->front.pitch = sarea->pitch * intelScreen->cpp;
 231    intelScreen->front.handle = sarea->front_handle;
 232    intelScreen->front.size = sarea->front_size;
 233    intelScreen->front.tiled = sarea->front_tiled;
 234
 235    intelScreen->back.offset = sarea->back_offset;
 236    intelScreen->back.pitch = sarea->pitch * intelScreen->cpp;
 237    intelScreen->back.handle = sarea->back_handle;
 238    intelScreen->back.size = sarea->back_size;
 239    intelScreen->back.tiled = sarea->back_tiled;
 240
 241    intelScreen->depth.offset = sarea->depth_offset;
 242    intelScreen->depth.pitch = sarea->pitch * intelScreen->cpp;
 243    intelScreen->depth.handle = sarea->depth_handle;
 244    intelScreen->depth.size = sarea->depth_size;
 245    intelScreen->depth.tiled = sarea->depth_tiled;
 246
 247    intelScreen->tex.offset = sarea->tex_offset;
 248    intelScreen->logTextureGranularity = sarea->log_tex_granularity;
 249    intelScreen->tex.handle = sarea->tex_handle;
 250    intelScreen->tex.size = sarea->tex_size;
 251
 252    intelScreen->rotated.offset = sarea->rotated_offset;
 253    intelScreen->rotated.pitch = sarea->rotated_pitch * intelScreen->cpp;
 254    intelScreen->rotated.size = sarea->rotated_size;
 255    intelScreen->rotated.tiled = sarea->rotated_tiled;
 256    intelScreen->current_rotation = sarea->rotation;
 257 #if 0
 258    matrix23Rotate(&intelScreen->rotMatrix,
 259                   sarea->width, sarea->height, sarea->rotation);
 260 #endif
 261    intelScreen->rotatedWidth = sarea->virtualX;
 262    intelScreen->rotatedHeight = sarea->virtualY;
 263
 264    if (0)
 265       intelPrintSAREA(sarea);
 266 }
 267
 268
 269 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 270 {
 271    intelScreenPrivate *intelScreen;
 272    I830DRIPtr         gDRIPriv = (I830DRIPtr)sPriv->pDevPriv;
 273    PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
 274      (PFNGLXSCRENABLEEXTENSIONPROC) (*dri_interface->getProcAddress("glxEnableExtension"));
 275    void * const psc = sPriv->psc->screenConfigs;
 276    volatile drmI830Sarea *sarea;
 277
 278    if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
 279       fprintf(stderr,"\nERROR!  sizeof(I830DRIRec) (%ld) does not match passed size from device driver (%d)\n", (unsigned long)sizeof(I830DRIRec), sPriv->devPrivSize);
 280       return GL_FALSE;
 281    }
 282
 283    /* Allocate the private area */
 284    intelScreen = (intelScreenPrivate *)CALLOC(sizeof(intelScreenPrivate));
 285    if (!intelScreen) {
 286       fprintf(stderr,"\nERROR!  Allocating private area failed\n");
 287       return GL_FALSE;
 288    }
 289    /* parse information in __driConfigOptions */
 290    driParseOptionInfo (&intelScreen->optionCache,
 291                        __driConfigOptions, __driNConfigOptions);
 292
 293    intelScreen->driScrnPriv = sPriv;
 294    sPriv->private = (void *)intelScreen;
 295    intelScreen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;
 296    sarea = (volatile drmI830Sarea *)
 297          (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 298
 299    intelScreen->deviceID = gDRIPriv->deviceID;
 300    intelScreen->mem = gDRIPriv->mem;
 301    intelScreen->cpp = gDRIPriv->cpp;
 302
 303    switch (gDRIPriv->bitsPerPixel) {
 304    case 15: intelScreen->fbFormat = DV_PF_555; break;
 305    case 16: intelScreen->fbFormat = DV_PF_565; break;
 306    case 32: intelScreen->fbFormat = DV_PF_8888; break;
 307    }
 308
 309    intelUpdateScreenFromSAREA(intelScreen, sarea);
 310
 311    if (0)
 312       intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
 313
 314    if (!intelMapScreenRegions(sPriv)) {
 315       fprintf(stderr,"\nERROR!  mapping regions\n");
 316       _mesa_free(intelScreen);
 317       sPriv->private = NULL;
 318       return GL_FALSE;
 319    }
 320
 321    intelScreen->drmMinor = sPriv->drmMinor;
 322
 323    /* Determine if IRQs are active? */
 324    {
 325       int ret;
 326       drmI830GetParam gp;
 327
 328       gp.param = I830_PARAM_IRQ_ACTIVE;
 329       gp.value = &intelScreen->irq_active;
 330
 331       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 332                                  &gp, sizeof(gp));
 333       if (ret) {
 334          fprintf(stderr, "drmI830GetParam: %d\n", ret);
 335          return GL_FALSE;
 336       }
 337    }
 338
 339    /* Determine if batchbuffers are allowed */
 340    {
 341       int ret;
 342       drmI830GetParam gp;
 343
 344       gp.param = I830_PARAM_ALLOW_BATCHBUFFER;
 345       gp.value = &intelScreen->allow_batchbuffer;
 346
 347       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 348                                  &gp, sizeof(gp));
 349       if (ret) {
 350          fprintf(stderr, "drmI830GetParam: (%d) %d\n", gp.param, ret);
 351          return GL_FALSE;
 352       }
 353    }
 354
 355    if (glx_enable_extension != NULL) {
 356       (*glx_enable_extension)( psc, "GLX_SGI_swap_control" );
 357       (*glx_enable_extension)( psc, "GLX_SGI_video_sync" );
 358       (*glx_enable_extension)( psc, "GLX_MESA_swap_control" );
 359       (*glx_enable_extension)( psc, "GLX_MESA_swap_frame_usage" );
 360       (*glx_enable_extension)( psc, "GLX_SGI_make_current_read" );
 361       (*glx_enable_extension)( psc, "GLX_MESA_copy_sub_buffer" );
 362    }
 363
 364    return GL_TRUE;
 365 }
 366
 367
 368 static void intelDestroyScreen(__DRIscreenPrivate *sPriv)
 369 {
 370    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 371
 372    intelUnmapScreenRegions(intelScreen);
 373    FREE(intelScreen);
 374    sPriv->private = NULL;
 375 }
 376
 377 static GLboolean intelCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 378                                     __DRIdrawablePrivate *driDrawPriv,
 379                                     const __GLcontextModes *mesaVis,
 380                                     GLboolean isPixmap )
 381 {
 382    intelScreenPrivate *screen = (intelScreenPrivate *) driScrnPriv->private;
 383
 384    if (isPixmap) {
 385       return GL_FALSE; /* not implemented */
 386    } else {
 387       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 388                              mesaVis->depthBits != 24);
 389
 390       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 391
 392       {
 393          driRenderbuffer *frontRb
 394             = driNewRenderbuffer(GL_RGBA,
 395                                  screen->front.map,
 396                                  screen->cpp,
 397                                  screen->front.offset, screen->front.pitch,
 398                                  driDrawPriv);
 399          intelSetSpanFunctions(frontRb, mesaVis);
 400          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 401       }
 402
 403       if (mesaVis->doubleBufferMode) {
 404          driRenderbuffer *backRb
 405             = driNewRenderbuffer(GL_RGBA,
 406                                  screen->back.map,
 407                                  screen->cpp,
 408                                  screen->back.offset, screen->back.pitch,
 409                                  driDrawPriv);
 410          intelSetSpanFunctions(backRb, mesaVis);
 411          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 412       }
 413
 414       if (mesaVis->depthBits == 16) {
 415          driRenderbuffer *depthRb
 416             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 417                                  screen->depth.map,
 418                                  screen->cpp,
 419                                  screen->depth.offset, screen->depth.pitch,
 420                                  driDrawPriv);
 421          intelSetSpanFunctions(depthRb, mesaVis);
 422          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 423       }
 424       else if (mesaVis->depthBits == 24) {
 425          driRenderbuffer *depthRb
 426             = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 427                                  screen->depth.map,
 428                                  screen->cpp,
 429                                  screen->depth.offset, screen->depth.pitch,
 430                                  driDrawPriv);
 431          intelSetSpanFunctions(depthRb, mesaVis);
 432          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 433       }
 434
 435       if (mesaVis->stencilBits > 0 && !swStencil) {
 436          driRenderbuffer *stencilRb
 437             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 438                                  screen->depth.map,
 439                                  screen->cpp,
 440                                  screen->depth.offset, screen->depth.pitch,
 441                                  driDrawPriv);
 442          intelSetSpanFunctions(stencilRb, mesaVis);
 443          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 444       }
 445
 446       _mesa_add_soft_renderbuffers(fb,
 447                                    GL_FALSE, /* color */
 448                                    GL_FALSE, /* depth */
 449                                    swStencil,
 450                                    mesaVis->accumRedBits > 0,
 451                                    GL_FALSE, /* alpha */
 452                                    GL_FALSE /* aux */);
 453       driDrawPriv->driverPrivate = (void *) fb;
 454
 455       return (driDrawPriv->driverPrivate != NULL);
 456    }
 457 }
 458
 459 static void intelDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 460 {
 461    _mesa_destroy_framebuffer((GLframebuffer *) (driDrawPriv->driverPrivate));
 462 }
 463
 464
 465 /**
 466  * Get information about previous buffer swaps.
 467  */
 468 static int
 469 intelGetSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 470 {
 471    struct intel_context *intel;
 472
 473    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 474         || (dPriv->driContextPriv->driverPrivate == NULL)
 475         || (sInfo == NULL) ) {
 476       return -1;
 477    }
 478
 479    intel = dPriv->driContextPriv->driverPrivate;
 480    sInfo->swap_count = intel->swap_count;
 481    sInfo->swap_ust = intel->swap_ust;
 482    sInfo->swap_missed_count = intel->swap_missed_count;
 483
 484    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 485        ? driCalculateSwapUsage( dPriv, 0, intel->swap_missed_ust )
 486        : 0.0;
 487
 488    return 0;
 489 }
 490
 491
 492 /* There are probably better ways to do this, such as an
 493  * init-designated function to register chipids and createcontext
 494  * functions.
 495  */
 496 extern GLboolean i830CreateContext( const __GLcontextModes *mesaVis,
 497                                     __DRIcontextPrivate *driContextPriv,
 498                                     void *sharedContextPrivate);
 499
 500 extern GLboolean i915CreateContext( const __GLcontextModes *mesaVis,
 501                                    __DRIcontextPrivate *driContextPriv,
 502                                    void *sharedContextPrivate);
 503
 504 extern GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
 505                                    __DRIcontextPrivate *driContextPriv,
 506                                    void *sharedContextPrivate);
 507
 508
 509
 510
 511 static GLboolean intelCreateContext( const __GLcontextModes *mesaVis,
 512                                    __DRIcontextPrivate *driContextPriv,
 513                                    void *sharedContextPrivate)
 514 {
 515 #if 0
 516    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 517    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 518    switch (intelScreen->deviceID) {
 519    case PCI_CHIP_845_G:
 520    case PCI_CHIP_I830_M:
 521    case PCI_CHIP_I855_GM:
 522    case PCI_CHIP_I865_G:
 523       return i830CreateContext( mesaVis, driContextPriv,
 524                                 sharedContextPrivate );
 525
 526    case PCI_CHIP_I915_G:
 527    case PCI_CHIP_I915_GM:
 528    case PCI_CHIP_I945_G:
 529    case PCI_CHIP_I945_GM:
 530       return i915CreateContext( mesaVis, driContextPriv,
 531                                sharedContextPrivate );
 532
 533    default:
 534       fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
 535       return GL_FALSE;
 536    }
 537 #else
 538    return brwCreateContext( mesaVis, driContextPriv,
 539                             sharedContextPrivate );
 540 #endif
 541 }
 542
 543
 544 static const struct __DriverAPIRec intelAPI = {
 545    .InitDriver      = intelInitDriver,
 546    .DestroyScreen   = intelDestroyScreen,
 547    .CreateContext   = intelCreateContext,
 548    .DestroyContext  = intelDestroyContext,
 549    .CreateBuffer    = intelCreateBuffer,
 550    .DestroyBuffer   = intelDestroyBuffer,
 551    .SwapBuffers     = intelSwapBuffers,
 552    .MakeCurrent     = intelMakeCurrent,
 553    .UnbindContext   = intelUnbindContext,
 554    .GetSwapInfo     = intelGetSwapInfo,
 555    .GetMSC          = driGetMSC32,
 556    .WaitForMSC      = driWaitForMSC32,
 557    .WaitForSBC      = NULL,
 558    .SwapBuffersMSC  = NULL,
 559    .CopySubBuffer   = intelCopySubBuffer
 560 };
 561
 562
 563 static __GLcontextModes *
 564 intelFillInModes( unsigned pixel_bits, unsigned depth_bits,
 565                  unsigned stencil_bits, GLboolean have_back_buffer )
 566 {
 567    __GLcontextModes * modes;
 568    __GLcontextModes * m;
 569    unsigned num_modes;
 570    unsigned depth_buffer_factor;
 571    unsigned back_buffer_factor;
 572    GLenum fb_format;
 573    GLenum fb_type;
 574
 575    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 576     * support pageflipping at all.
 577     */
 578    static const GLenum back_buffer_modes[] = {
 579       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 580    };
 581
 582    u_int8_t depth_bits_array[3];
 583    u_int8_t stencil_bits_array[3];
 584
 585
 586    depth_bits_array[0] = 0;
 587    depth_bits_array[1] = depth_bits;
 588    depth_bits_array[2] = depth_bits;
 589
 590    /* Just like with the accumulation buffer, always provide some modes
 591     * with a stencil buffer.  It will be a sw fallback, but some apps won't
 592     * care about that.
 593     */
 594    stencil_bits_array[0] = 0;
 595    stencil_bits_array[1] = 0;
 596    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 597
 598    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 599    back_buffer_factor  = (have_back_buffer) ? 3 : 1;
 600
 601    num_modes = depth_buffer_factor * back_buffer_factor * 4;
 602
 603     if ( pixel_bits == 16 ) {
 604         fb_format = GL_RGB;
 605         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 606     }
 607     else {
 608         fb_format = GL_BGRA;
 609         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 610     }
 611
 612    modes = (*dri_interface->createContextModes)( num_modes, sizeof( __GLcontextModes ) );
 613    m = modes;
 614    if ( ! driFillInModes( & m, fb_format, fb_type,
 615                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 616                           back_buffer_modes, back_buffer_factor,
 617                           GLX_TRUE_COLOR ) ) {
 618         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 619                  __func__, __LINE__ );
 620         return NULL;
 621    }
 622    if ( ! driFillInModes( & m, fb_format, fb_type,
 623                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 624                           back_buffer_modes, back_buffer_factor,
 625                           GLX_DIRECT_COLOR ) ) {
 626         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 627                  __func__, __LINE__ );
 628         return NULL;
 629    }
 630
 631    /* Mark the visual as slow if there are "fake" stencil bits.
 632     */
 633    for ( m = modes ; m != NULL ; m = m->next ) {
 634       if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
 635          m->visualRating = GLX_SLOW_CONFIG;
 636       }
 637    }
 638
 639    return modes;
 640 }
 641
 642
 643 /**
 644  * This is the bootstrap function for the driver.  libGL supplies all of the
 645  * requisite information about the system, and the driver initializes itself.
 646  * This routine also fills in the linked list pointed to by \c driver_modes
 647  * with the \c __GLcontextModes that the driver can support for windows or
 648  * pbuffers.
 649  *
 650  * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on
 651  *         failure.
 652  */
 653 PUBLIC
 654 void * __driCreateNewScreen_20050727( __DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
 655                              const __GLcontextModes * modes,
 656                              const __DRIversion * ddx_version,
 657                              const __DRIversion * dri_version,
 658                              const __DRIversion * drm_version,
 659                              const __DRIframebuffer * frame_buffer,
 660                              drmAddress pSAREA, int fd,
 661                              int internal_api_version,
 662                              const __DRIinterfaceMethods * interface,
 663                              __GLcontextModes ** driver_modes )
 664
 665 {
 666    __DRIscreenPrivate *psp;
 667    static const __DRIversion ddx_expected = { 1, 6, 0 };
 668    static const __DRIversion dri_expected = { 4, 0, 0 };
 669    static const __DRIversion drm_expected = { 1, 3, 0 };
 670
 671    dri_interface = interface;
 672
 673    if ( ! driCheckDriDdxDrmVersions2( "i915",
 674                                       dri_version, & dri_expected,
 675                                       ddx_version, & ddx_expected,
 676                                       drm_version, & drm_expected ) ) {
 677       return NULL;
 678    }
 679
 680    psp = __driUtilCreateNewScreen(dpy, scrn, psc, NULL,
 681                                   ddx_version, dri_version, drm_version,
 682                                   frame_buffer, pSAREA, fd,
 683                                   internal_api_version, &intelAPI);
 684    if ( psp != NULL ) {
 685       I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
 686       *driver_modes = intelFillInModes( dri_priv->cpp * 8,
 687                                         (dri_priv->cpp == 2) ? 16 : 24,
 688                                         (dri_priv->cpp == 2) ? 0  : 8,
 689                                         GL_TRUE );
 690
 691       /* Calling driInitExtensions here, with a NULL context pointer, does not actually
 692        * enable the extensions.  It just makes sure that all the dispatch offsets for all
 693        * the extensions that *might* be enables are known.  This is needed because the
 694        * dispatch offsets need to be known when _mesa_context_create is called, but we can't
 695        * enable the extensions until we have a context pointer.
 696        *
 697        * Hello chicken.  Hello egg.  How are you two today?
 698        */
 699       driInitExtensions( NULL, card_extensions, GL_FALSE );
 700    }
 701
 702    return (void *) psp;
 703 }