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