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 #include "intel_regions.h"
  46 #include "intel_bufmgr_ttm.h"
  47
  48 #include "i915_drm.h"
  49 #include "i830_dri.h"
  50
  51 PUBLIC const char __driConfigOptions[] =
  52 DRI_CONF_BEGIN
  53     DRI_CONF_SECTION_PERFORMANCE
  54        DRI_CONF_FTHROTTLE_MODE(DRI_CONF_FTHROTTLE_IRQS)
  55        DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_0)
  56     DRI_CONF_SECTION_END
  57     DRI_CONF_SECTION_QUALITY
  58        DRI_CONF_FORCE_S3TC_ENABLE(false)
  59        DRI_CONF_ALLOW_LARGE_TEXTURES(1)
  60       DRI_CONF_SECTION_END
  61 DRI_CONF_END;
  62 const GLuint __driNConfigOptions = 4;
  63
  64 #ifdef USE_NEW_INTERFACE
  65 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  66 #endif /*USE_NEW_INTERFACE*/
  67
  68 /**
  69  * Map all the memory regions described by the screen.
  70  * \return GL_TRUE if success, GL_FALSE if error.
  71  */
  72 GLboolean
  73 intelMapScreenRegions(__DRIscreenPrivate *sPriv)
  74 {
  75    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
  76
  77    if (intelScreen->front.handle) {
  78       if (drmMap(sPriv->fd,
  79                  intelScreen->front.handle,
  80                  intelScreen->front.size,
  81                  (drmAddress *)&intelScreen->front.map) != 0) {
  82          _mesa_problem(NULL, "drmMap(frontbuffer) failed!");
  83          return GL_FALSE;
  84       }
  85    } else {
  86       /* Use the old static allocation method if the server isn't setting up
  87        * a movable handle for us.  Add in the front buffer offset from
  88        * framebuffer start, as our span routines (unlike other drivers) expect
  89        * the renderbuffer address to point to the beginning of the
  90        * renderbuffer.
  91        */
  92       intelScreen->front.map = (char *)sPriv->pFB;
  93       if (intelScreen->front.map == NULL) {
  94          fprintf(stderr, "Failed to find framebuffer mapping\n");
  95          return GL_FALSE;
  96       }
  97    }
  98
  99    if (drmMap(sPriv->fd,
 100               intelScreen->back.handle,
 101               intelScreen->back.size,
 102               (drmAddress *)&intelScreen->back.map) != 0) {
 103       intelUnmapScreenRegions(intelScreen);
 104       return GL_FALSE;
 105    }
 106
 107    if (drmMap(sPriv->fd,
 108               intelScreen->depth.handle,
 109               intelScreen->depth.size,
 110               (drmAddress *)&intelScreen->depth.map) != 0) {
 111       intelUnmapScreenRegions(intelScreen);
 112       return GL_FALSE;
 113    }
 114
 115    if (drmMap(sPriv->fd,
 116               intelScreen->tex.handle,
 117               intelScreen->tex.size,
 118               (drmAddress *)&intelScreen->tex.map) != 0) {
 119       intelUnmapScreenRegions(intelScreen);
 120       return GL_FALSE;
 121    }
 122
 123    if (0)
 124       printf("Mappings:  front: %p  back: %p  depth: %p  tex: %p\n",
 125           intelScreen->front.map,
 126           intelScreen->back.map,
 127           intelScreen->depth.map,
 128           intelScreen->tex.map);
 129    return GL_TRUE;
 130 }
 131
 132 void
 133 intelUnmapScreenRegions(intelScreenPrivate *intelScreen)
 134 {
 135 #define REALLY_UNMAP 1
 136    /* If front.handle is present, we're doing the dynamic front buffer mapping,
 137     * but if we've fallen back to static allocation then we shouldn't try to
 138     * unmap here.
 139     */
 140    if (intelScreen->front.handle) {
 141 #if REALLY_UNMAP
 142       if (drmUnmap(intelScreen->front.map, intelScreen->front.size) != 0)
 143          printf("drmUnmap front failed!\n");
 144 #endif
 145       intelScreen->front.map = NULL;
 146    }
 147    if (intelScreen->back.map) {
 148 #if REALLY_UNMAP
 149       if (drmUnmap(intelScreen->back.map, intelScreen->back.size) != 0)
 150          printf("drmUnmap back failed!\n");
 151 #endif
 152       intelScreen->back.map = NULL;
 153    }
 154    if (intelScreen->depth.map) {
 155 #if REALLY_UNMAP
 156       drmUnmap(intelScreen->depth.map, intelScreen->depth.size);
 157       intelScreen->depth.map = NULL;
 158 #endif
 159    }
 160    if (intelScreen->tex.map) {
 161 #if REALLY_UNMAP
 162       drmUnmap(intelScreen->tex.map, intelScreen->tex.size);
 163       intelScreen->tex.map = NULL;
 164 #endif
 165    }
 166 }
 167
 168
 169 static void
 170 intelPrintDRIInfo(intelScreenPrivate *intelScreen,
 171                   __DRIscreenPrivate *sPriv,
 172                   I830DRIPtr gDRIPriv)
 173 {
 174    fprintf(stderr, "*** Front size:   0x%x  offset: 0x%x  pitch: %d\n",
 175            intelScreen->front.size, intelScreen->front.offset,
 176            intelScreen->front.pitch);
 177    fprintf(stderr, "*** Back size:    0x%x  offset: 0x%x  pitch: %d\n",
 178            intelScreen->back.size, intelScreen->back.offset,
 179            intelScreen->back.pitch);
 180    fprintf(stderr, "*** Depth size:   0x%x  offset: 0x%x  pitch: %d\n",
 181            intelScreen->depth.size, intelScreen->depth.offset,
 182            intelScreen->depth.pitch);
 183    fprintf(stderr, "*** Rotated size: 0x%x  offset: 0x%x  pitch: %d\n",
 184            intelScreen->rotated.size, intelScreen->rotated.offset,
 185            intelScreen->rotated.pitch);
 186    fprintf(stderr, "*** Texture size: 0x%x  offset: 0x%x\n",
 187            intelScreen->tex.size, intelScreen->tex.offset);
 188    fprintf(stderr, "*** Memory : 0x%x\n", gDRIPriv->mem);
 189 }
 190
 191
 192 static void
 193 intelPrintSAREA(volatile drmI830Sarea *sarea)
 194 {
 195    fprintf(stderr, "SAREA: sarea width %d  height %d\n", sarea->width, sarea->height);
 196    fprintf(stderr, "SAREA: pitch: %d\n", sarea->pitch);
 197    fprintf(stderr,
 198            "SAREA: front offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 199            sarea->front_offset, sarea->front_size,
 200            (unsigned) sarea->front_handle);
 201    fprintf(stderr,
 202            "SAREA: back  offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 203            sarea->back_offset, sarea->back_size,
 204            (unsigned) sarea->back_handle);
 205    fprintf(stderr, "SAREA: depth offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 206            sarea->depth_offset, sarea->depth_size,
 207            (unsigned) sarea->depth_handle);
 208    fprintf(stderr, "SAREA: tex   offset: 0x%08x  size: 0x%x  handle: 0x%x\n",
 209            sarea->tex_offset, sarea->tex_size,
 210            (unsigned) sarea->tex_handle);
 211    fprintf(stderr, "SAREA: rotation: %d\n", sarea->rotation);
 212    fprintf(stderr,
 213            "SAREA: rotated offset: 0x%08x  size: 0x%x\n",
 214            sarea->rotated_offset, sarea->rotated_size);
 215    fprintf(stderr, "SAREA: rotated pitch: %d\n", sarea->rotated_pitch);
 216 }
 217
 218
 219 /**
 220  * A number of the screen parameters are obtained/computed from
 221  * information in the SAREA.  This function updates those parameters.
 222  */
 223 void
 224 intelUpdateScreenFromSAREA(intelScreenPrivate *intelScreen,
 225                            volatile drmI830Sarea *sarea)
 226 {
 227    intelScreen->width = sarea->width;
 228    intelScreen->height = sarea->height;
 229
 230    intelScreen->front.offset = sarea->front_offset;
 231    intelScreen->front.pitch = sarea->pitch * intelScreen->cpp;
 232    intelScreen->front.handle = sarea->front_handle;
 233    intelScreen->front.size = sarea->front_size;
 234    intelScreen->front.tiled = sarea->front_tiled;
 235
 236    intelScreen->back.offset = sarea->back_offset;
 237    intelScreen->back.pitch = sarea->pitch * intelScreen->cpp;
 238    intelScreen->back.handle = sarea->back_handle;
 239    intelScreen->back.size = sarea->back_size;
 240    intelScreen->back.tiled = sarea->back_tiled;
 241
 242    intelScreen->depth.offset = sarea->depth_offset;
 243    intelScreen->depth.pitch = sarea->pitch * intelScreen->cpp;
 244    intelScreen->depth.handle = sarea->depth_handle;
 245    intelScreen->depth.size = sarea->depth_size;
 246    intelScreen->depth.tiled = sarea->depth_tiled;
 247
 248    if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
 249       intelScreen->front.bo_handle = sarea->front_bo_handle;
 250       intelScreen->back.bo_handle = sarea->back_bo_handle;
 251       intelScreen->depth.bo_handle = sarea->depth_bo_handle;
 252    } else {
 253       intelScreen->front.bo_handle = -1;
 254       intelScreen->back.bo_handle = -1;
 255       intelScreen->depth.bo_handle = -1;
 256    }
 257
 258    intelScreen->tex.offset = sarea->tex_offset;
 259    intelScreen->logTextureGranularity = sarea->log_tex_granularity;
 260    intelScreen->tex.handle = sarea->tex_handle;
 261    intelScreen->tex.size = sarea->tex_size;
 262
 263    intelScreen->rotated.offset = sarea->rotated_offset;
 264    intelScreen->rotated.pitch = sarea->rotated_pitch * intelScreen->cpp;
 265    intelScreen->rotated.size = sarea->rotated_size;
 266    intelScreen->rotated.tiled = sarea->rotated_tiled;
 267    intelScreen->current_rotation = sarea->rotation;
 268 #if 0
 269    matrix23Rotate(&intelScreen->rotMatrix,
 270                   sarea->width, sarea->height, sarea->rotation);
 271 #endif
 272    intelScreen->rotatedWidth = sarea->virtualX;
 273    intelScreen->rotatedHeight = sarea->virtualY;
 274
 275    if (0)
 276       intelPrintSAREA(sarea);
 277 }
 278
 279 static const __DRIextension *intelExtensions[] = {
 280     &driReadDrawableExtension,
 281     &driCopySubBufferExtension.base,
 282     &driSwapControlExtension.base,
 283     &driFrameTrackingExtension.base,
 284     &driMediaStreamCounterExtension.base,
 285     NULL
 286 };
 287
 288 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 289 {
 290    intelScreenPrivate *intelScreen;
 291    I830DRIPtr         gDRIPriv = (I830DRIPtr)sPriv->pDevPriv;
 292    volatile drmI830Sarea *sarea;
 293
 294    if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
 295       fprintf(stderr,"\nERROR!  sizeof(I830DRIRec) (%ld) does not match passed size from device driver (%d)\n", (unsigned long)sizeof(I830DRIRec), sPriv->devPrivSize);
 296       return GL_FALSE;
 297    }
 298
 299    /* Allocate the private area */
 300    intelScreen = (intelScreenPrivate *)CALLOC(sizeof(intelScreenPrivate));
 301    if (!intelScreen) {
 302       fprintf(stderr,"\nERROR!  Allocating private area failed\n");
 303       return GL_FALSE;
 304    }
 305    /* parse information in __driConfigOptions */
 306    driParseOptionInfo (&intelScreen->optionCache,
 307                        __driConfigOptions, __driNConfigOptions);
 308
 309    intelScreen->driScrnPriv = sPriv;
 310    sPriv->private = (void *)intelScreen;
 311    intelScreen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;
 312    sarea = (volatile drmI830Sarea *)
 313          (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 314
 315    intelScreen->deviceID = gDRIPriv->deviceID;
 316    intelScreen->mem = gDRIPriv->mem;
 317    intelScreen->cpp = gDRIPriv->cpp;
 318
 319    switch (gDRIPriv->bitsPerPixel) {
 320    case 15: intelScreen->fbFormat = DV_PF_555; break;
 321    case 16: intelScreen->fbFormat = DV_PF_565; break;
 322    case 32: intelScreen->fbFormat = DV_PF_8888; break;
 323    }
 324
 325    intelUpdateScreenFromSAREA(intelScreen, sarea);
 326
 327    if (0)
 328       intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
 329
 330    if (!intelMapScreenRegions(sPriv)) {
 331       fprintf(stderr,"\nERROR!  mapping regions\n");
 332       _mesa_free(intelScreen);
 333       sPriv->private = NULL;
 334       return GL_FALSE;
 335    }
 336
 337    intelScreen->drmMinor = sPriv->drm_version.minor;
 338
 339    /* Determine if IRQs are active? */
 340    {
 341       int ret;
 342       drmI830GetParam gp;
 343
 344       gp.param = I830_PARAM_IRQ_ACTIVE;
 345       gp.value = &intelScreen->irq_active;
 346
 347       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 348                                  &gp, sizeof(gp));
 349       if (ret) {
 350          fprintf(stderr, "drmI830GetParam: %d\n", ret);
 351          return GL_FALSE;
 352       }
 353    }
 354
 355    /* Determine if batchbuffers are allowed */
 356    {
 357       int ret;
 358       drmI830GetParam gp;
 359
 360       gp.param = I830_PARAM_ALLOW_BATCHBUFFER;
 361       gp.value = &intelScreen->allow_batchbuffer;
 362
 363       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 364                                  &gp, sizeof(gp));
 365       if (ret) {
 366          fprintf(stderr, "drmI830GetParam: (%d) %d\n", gp.param, ret);
 367          return GL_FALSE;
 368       }
 369    }
 370
 371    sPriv->extensions = intelExtensions;
 372
 373    return GL_TRUE;
 374 }
 375
 376
 377 static void intelDestroyScreen(__DRIscreenPrivate *sPriv)
 378 {
 379    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 380
 381    intelUnmapScreenRegions(intelScreen);
 382    FREE(intelScreen);
 383    sPriv->private = NULL;
 384 }
 385
 386 static GLboolean intelCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 387                                     __DRIdrawablePrivate *driDrawPriv,
 388                                     const __GLcontextModes *mesaVis,
 389                                     GLboolean isPixmap )
 390 {
 391    intelScreenPrivate *screen = (intelScreenPrivate *) driScrnPriv->private;
 392
 393    if (isPixmap) {
 394       return GL_FALSE; /* not implemented */
 395    } else {
 396       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 397                              mesaVis->depthBits != 24);
 398
 399       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 400
 401       {
 402          driRenderbuffer *frontRb
 403             = driNewRenderbuffer(GL_RGBA,
 404                                  screen->front.map,
 405                                  screen->cpp,
 406                                  screen->front.offset, screen->front.pitch,
 407                                  driDrawPriv);
 408          intelSetSpanFunctions(frontRb, mesaVis);
 409          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 410       }
 411
 412       if (mesaVis->doubleBufferMode) {
 413          driRenderbuffer *backRb
 414             = driNewRenderbuffer(GL_RGBA,
 415                                  screen->back.map,
 416                                  screen->cpp,
 417                                  screen->back.offset, screen->back.pitch,
 418                                  driDrawPriv);
 419          intelSetSpanFunctions(backRb, mesaVis);
 420          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 421       }
 422
 423       if (mesaVis->depthBits == 16) {
 424          driRenderbuffer *depthRb
 425             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 426                                  screen->depth.map,
 427                                  screen->cpp,
 428                                  screen->depth.offset, screen->depth.pitch,
 429                                  driDrawPriv);
 430          intelSetSpanFunctions(depthRb, mesaVis);
 431          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 432       }
 433       else if (mesaVis->depthBits == 24) {
 434          driRenderbuffer *depthRb
 435             = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 436                                  screen->depth.map,
 437                                  screen->cpp,
 438                                  screen->depth.offset, screen->depth.pitch,
 439                                  driDrawPriv);
 440          intelSetSpanFunctions(depthRb, mesaVis);
 441          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 442       }
 443
 444       if (mesaVis->stencilBits > 0 && !swStencil) {
 445          driRenderbuffer *stencilRb
 446             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 447                                  screen->depth.map,
 448                                  screen->cpp,
 449                                  screen->depth.offset, screen->depth.pitch,
 450                                  driDrawPriv);
 451          intelSetSpanFunctions(stencilRb, mesaVis);
 452          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 453       }
 454
 455       _mesa_add_soft_renderbuffers(fb,
 456                                    GL_FALSE, /* color */
 457                                    GL_FALSE, /* depth */
 458                                    swStencil,
 459                                    mesaVis->accumRedBits > 0,
 460                                    GL_FALSE, /* alpha */
 461                                    GL_FALSE /* aux */);
 462       driDrawPriv->driverPrivate = (void *) fb;
 463
 464       return (driDrawPriv->driverPrivate != NULL);
 465    }
 466 }
 467
 468 static void intelDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 469 {
 470    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 471 }
 472
 473
 474 /**
 475  * Get information about previous buffer swaps.
 476  */
 477 static int
 478 intelGetSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 479 {
 480    struct intel_context *intel;
 481
 482    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 483         || (dPriv->driContextPriv->driverPrivate == NULL)
 484         || (sInfo == NULL) ) {
 485       return -1;
 486    }
 487
 488    intel = dPriv->driContextPriv->driverPrivate;
 489    sInfo->swap_count = intel->swap_count;
 490    sInfo->swap_ust = intel->swap_ust;
 491    sInfo->swap_missed_count = intel->swap_missed_count;
 492
 493    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 494        ? driCalculateSwapUsage( dPriv, 0, intel->swap_missed_ust )
 495        : 0.0;
 496
 497    return 0;
 498 }
 499
 500
 501 /* There are probably better ways to do this, such as an
 502  * init-designated function to register chipids and createcontext
 503  * functions.
 504  */
 505 extern GLboolean i830CreateContext( const __GLcontextModes *mesaVis,
 506                                     __DRIcontextPrivate *driContextPriv,
 507                                     void *sharedContextPrivate);
 508
 509 extern GLboolean i915CreateContext( const __GLcontextModes *mesaVis,
 510                                    __DRIcontextPrivate *driContextPriv,
 511                                    void *sharedContextPrivate);
 512
 513 extern GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
 514                                    __DRIcontextPrivate *driContextPriv,
 515                                    void *sharedContextPrivate);
 516
 517
 518
 519
 520 static GLboolean intelCreateContext( const __GLcontextModes *mesaVis,
 521                                    __DRIcontextPrivate *driContextPriv,
 522                                    void *sharedContextPrivate)
 523 {
 524 #if 0
 525    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 526    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 527    switch (intelScreen->deviceID) {
 528    case PCI_CHIP_845_G:
 529    case PCI_CHIP_I830_M:
 530    case PCI_CHIP_I855_GM:
 531    case PCI_CHIP_I865_G:
 532       return i830CreateContext( mesaVis, driContextPriv,
 533                                 sharedContextPrivate );
 534
 535    case PCI_CHIP_I915_G:
 536    case PCI_CHIP_I915_GM:
 537    case PCI_CHIP_I945_G:
 538    case PCI_CHIP_I945_GM:
 539       return i915CreateContext( mesaVis, driContextPriv,
 540                                sharedContextPrivate );
 541
 542    default:
 543       fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
 544       return GL_FALSE;
 545    }
 546 #else
 547    return brwCreateContext( mesaVis, driContextPriv,
 548                             sharedContextPrivate );
 549 #endif
 550 }
 551
 552
 553 static const struct __DriverAPIRec intelAPI = {
 554    .DestroyScreen   = intelDestroyScreen,
 555    .CreateContext   = intelCreateContext,
 556    .DestroyContext  = intelDestroyContext,
 557    .CreateBuffer    = intelCreateBuffer,
 558    .DestroyBuffer   = intelDestroyBuffer,
 559    .SwapBuffers     = intelSwapBuffers,
 560    .MakeCurrent     = intelMakeCurrent,
 561    .UnbindContext   = intelUnbindContext,
 562    .GetSwapInfo     = intelGetSwapInfo,
 563    .GetMSC          = driGetMSC32,
 564    .GetDrawableMSC  = driDrawableGetMSC32,
 565    .WaitForMSC      = driWaitForMSC32,
 566    .WaitForSBC      = NULL,
 567    .SwapBuffersMSC  = NULL,
 568    .CopySubBuffer   = intelCopySubBuffer
 569 };
 570
 571
 572 static __GLcontextModes *
 573 intelFillInModes( unsigned pixel_bits, unsigned depth_bits,
 574                  unsigned stencil_bits, GLboolean have_back_buffer )
 575 {
 576    __GLcontextModes * modes;
 577    __GLcontextModes * m;
 578    unsigned num_modes;
 579    unsigned depth_buffer_factor;
 580    unsigned back_buffer_factor;
 581    GLenum fb_format;
 582    GLenum fb_type;
 583
 584    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 585     * support pageflipping at all.
 586     */
 587    static const GLenum back_buffer_modes[] = {
 588       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 589    };
 590
 591    u_int8_t depth_bits_array[3];
 592    u_int8_t stencil_bits_array[3];
 593
 594
 595    depth_bits_array[0] = 0;
 596    depth_bits_array[1] = depth_bits;
 597    depth_bits_array[2] = depth_bits;
 598
 599    /* Just like with the accumulation buffer, always provide some modes
 600     * with a stencil buffer.  It will be a sw fallback, but some apps won't
 601     * care about that.
 602     */
 603    stencil_bits_array[0] = 0;
 604    stencil_bits_array[1] = 0;
 605    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 606
 607    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 608    back_buffer_factor  = (have_back_buffer) ? 3 : 1;
 609
 610    num_modes = depth_buffer_factor * back_buffer_factor * 4;
 611
 612     if ( pixel_bits == 16 ) {
 613         fb_format = GL_RGB;
 614         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 615     }
 616     else {
 617         fb_format = GL_BGRA;
 618         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 619     }
 620
 621    modes = (*dri_interface->createContextModes)( num_modes, sizeof( __GLcontextModes ) );
 622    m = modes;
 623    if ( ! driFillInModes( & m, fb_format, fb_type,
 624                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 625                           back_buffer_modes, back_buffer_factor,
 626                           GLX_TRUE_COLOR ) ) {
 627         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 628                  __func__, __LINE__ );
 629         return NULL;
 630    }
 631    if ( ! driFillInModes( & m, fb_format, fb_type,
 632                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 633                           back_buffer_modes, back_buffer_factor,
 634                           GLX_DIRECT_COLOR ) ) {
 635         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 636                  __func__, __LINE__ );
 637         return NULL;
 638    }
 639
 640    /* Mark the visual as slow if there are "fake" stencil bits.
 641     */
 642    for ( m = modes ; m != NULL ; m = m->next ) {
 643       if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
 644          m->visualRating = GLX_SLOW_CONFIG;
 645       }
 646    }
 647
 648    return modes;
 649 }
 650
 651
 652 /**
 653  * This is the driver specific part of the createNewScreen entry point.
 654  *
 655  * \todo maybe fold this into intelInitDriver
 656  *
 657  * \return the __GLcontextModes supported by this driver
 658  */
 659 __GLcontextModes *__driDriverInitScreen(__DRIscreenPrivate *psp)
 660 {
 661    static const __DRIversion ddx_expected = { 1, 6, 0 };
 662    static const __DRIversion dri_expected = { 4, 0, 0 };
 663    static const __DRIversion drm_expected = { 1, 3, 0 };
 664    I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
 665
 666    psp->DriverAPI = intelAPI;
 667    if ( ! driCheckDriDdxDrmVersions2( "i915",
 668                                       &psp->dri_version, &dri_expected,
 669                                       &psp->ddx_version, &ddx_expected,
 670                                       &psp->drm_version, &drm_expected ) ) {
 671        return NULL;
 672    }
 673
 674    /* Calling driInitExtensions here, with a NULL context pointer,
 675     * does not actually enable the extensions.  It just makes sure
 676     * that all the dispatch offsets for all the extensions that
 677     * *might* be enables are known.  This is needed because the
 678     * dispatch offsets need to be known when _mesa_context_create is
 679     * called, but we can't enable the extensions until we have a
 680     * context pointer.
 681     *
 682     * Hello chicken.  Hello egg.  How are you two today?
 683     */
 684    intelInitExtensions(NULL, GL_FALSE);
 685
 686    if (!intelInitDriver(psp))
 687        return NULL;
 688
 689    return intelFillInModes( dri_priv->cpp * 8,
 690                             (dri_priv->cpp == 2) ? 16 : 24,
 691                             (dri_priv->cpp == 2) ? 0  : 8,
 692                             GL_TRUE );
 693 }