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