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
 268 static GLboolean intelInitDriver(__DRIscreenPrivate *sPriv)
 269 {
 270    intelScreenPrivate *intelScreen;
 271    I830DRIPtr         gDRIPriv = (I830DRIPtr)sPriv->pDevPriv;
 272    PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
 273      (PFNGLXSCRENABLEEXTENSIONPROC) (*dri_interface->getProcAddress("glxEnableExtension"));
 274    volatile drmI830Sarea *sarea;
 275
 276    if (sPriv->devPrivSize != sizeof(I830DRIRec)) {
 277       fprintf(stderr,"\nERROR!  sizeof(I830DRIRec) (%ld) does not match passed size from device driver (%d)\n", (unsigned long)sizeof(I830DRIRec), sPriv->devPrivSize);
 278       return GL_FALSE;
 279    }
 280
 281    /* Allocate the private area */
 282    intelScreen = (intelScreenPrivate *)CALLOC(sizeof(intelScreenPrivate));
 283    if (!intelScreen) {
 284       fprintf(stderr,"\nERROR!  Allocating private area failed\n");
 285       return GL_FALSE;
 286    }
 287    /* parse information in __driConfigOptions */
 288    driParseOptionInfo (&intelScreen->optionCache,
 289                        __driConfigOptions, __driNConfigOptions);
 290
 291    intelScreen->driScrnPriv = sPriv;
 292    sPriv->private = (void *)intelScreen;
 293    intelScreen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;
 294    sarea = (volatile drmI830Sarea *)
 295          (((GLubyte *)sPriv->pSAREA)+intelScreen->sarea_priv_offset);
 296
 297    intelScreen->deviceID = gDRIPriv->deviceID;
 298    intelScreen->mem = gDRIPriv->mem;
 299    intelScreen->cpp = gDRIPriv->cpp;
 300
 301    switch (gDRIPriv->bitsPerPixel) {
 302    case 15: intelScreen->fbFormat = DV_PF_555; break;
 303    case 16: intelScreen->fbFormat = DV_PF_565; break;
 304    case 32: intelScreen->fbFormat = DV_PF_8888; break;
 305    }
 306
 307    intelUpdateScreenFromSAREA(intelScreen, sarea);
 308
 309    if (0)
 310       intelPrintDRIInfo(intelScreen, sPriv, gDRIPriv);
 311
 312    if (!intelMapScreenRegions(sPriv)) {
 313       fprintf(stderr,"\nERROR!  mapping regions\n");
 314       _mesa_free(intelScreen);
 315       sPriv->private = NULL;
 316       return GL_FALSE;
 317    }
 318
 319    intelScreen->drmMinor = sPriv->drmMinor;
 320
 321    /* Determine if IRQs are active? */
 322    {
 323       int ret;
 324       drmI830GetParam gp;
 325
 326       gp.param = I830_PARAM_IRQ_ACTIVE;
 327       gp.value = &intelScreen->irq_active;
 328
 329       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 330                                  &gp, sizeof(gp));
 331       if (ret) {
 332          fprintf(stderr, "drmI830GetParam: %d\n", ret);
 333          return GL_FALSE;
 334       }
 335    }
 336
 337    /* Determine if batchbuffers are allowed */
 338    {
 339       int ret;
 340       drmI830GetParam gp;
 341
 342       gp.param = I830_PARAM_ALLOW_BATCHBUFFER;
 343       gp.value = &intelScreen->allow_batchbuffer;
 344
 345       ret = drmCommandWriteRead( sPriv->fd, DRM_I830_GETPARAM,
 346                                  &gp, sizeof(gp));
 347       if (ret) {
 348          fprintf(stderr, "drmI830GetParam: (%d) %d\n", gp.param, ret);
 349          return GL_FALSE;
 350       }
 351    }
 352
 353    if (glx_enable_extension != NULL) {
 354       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_swap_control" );
 355       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_video_sync" );
 356       (*glx_enable_extension)( sPriv->psc, "GLX_MESA_swap_control" );
 357       (*glx_enable_extension)( sPriv->psc, "GLX_MESA_swap_frame_usage" );
 358       (*glx_enable_extension)( sPriv->psc, "GLX_SGI_make_current_read" );
 359       (*glx_enable_extension)( sPriv->psc, "GLX_MESA_copy_sub_buffer" );
 360    }
 361
 362    return GL_TRUE;
 363 }
 364
 365
 366 static void intelDestroyScreen(__DRIscreenPrivate *sPriv)
 367 {
 368    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 369
 370    intelUnmapScreenRegions(intelScreen);
 371    FREE(intelScreen);
 372    sPriv->private = NULL;
 373 }
 374
 375 static GLboolean intelCreateBuffer( __DRIscreenPrivate *driScrnPriv,
 376                                     __DRIdrawablePrivate *driDrawPriv,
 377                                     const __GLcontextModes *mesaVis,
 378                                     GLboolean isPixmap )
 379 {
 380    intelScreenPrivate *screen = (intelScreenPrivate *) driScrnPriv->private;
 381
 382    if (isPixmap) {
 383       return GL_FALSE; /* not implemented */
 384    } else {
 385       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 386                              mesaVis->depthBits != 24);
 387
 388       struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);
 389
 390       {
 391          driRenderbuffer *frontRb
 392             = driNewRenderbuffer(GL_RGBA,
 393                                  screen->front.map,
 394                                  screen->cpp,
 395                                  screen->front.offset, screen->front.pitch,
 396                                  driDrawPriv);
 397          intelSetSpanFunctions(frontRb, mesaVis);
 398          _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
 399       }
 400
 401       if (mesaVis->doubleBufferMode) {
 402          driRenderbuffer *backRb
 403             = driNewRenderbuffer(GL_RGBA,
 404                                  screen->back.map,
 405                                  screen->cpp,
 406                                  screen->back.offset, screen->back.pitch,
 407                                  driDrawPriv);
 408          intelSetSpanFunctions(backRb, mesaVis);
 409          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
 410       }
 411
 412       if (mesaVis->depthBits == 16) {
 413          driRenderbuffer *depthRb
 414             = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
 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       else if (mesaVis->depthBits == 24) {
 423          driRenderbuffer *depthRb
 424             = driNewRenderbuffer(GL_DEPTH_COMPONENT24,
 425                                  screen->depth.map,
 426                                  screen->cpp,
 427                                  screen->depth.offset, screen->depth.pitch,
 428                                  driDrawPriv);
 429          intelSetSpanFunctions(depthRb, mesaVis);
 430          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 431       }
 432
 433       if (mesaVis->stencilBits > 0 && !swStencil) {
 434          driRenderbuffer *stencilRb
 435             = driNewRenderbuffer(GL_STENCIL_INDEX8_EXT,
 436                                  screen->depth.map,
 437                                  screen->cpp,
 438                                  screen->depth.offset, screen->depth.pitch,
 439                                  driDrawPriv);
 440          intelSetSpanFunctions(stencilRb, mesaVis);
 441          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &stencilRb->Base);
 442       }
 443
 444       _mesa_add_soft_renderbuffers(fb,
 445                                    GL_FALSE, /* color */
 446                                    GL_FALSE, /* depth */
 447                                    swStencil,
 448                                    mesaVis->accumRedBits > 0,
 449                                    GL_FALSE, /* alpha */
 450                                    GL_FALSE /* aux */);
 451       driDrawPriv->driverPrivate = (void *) fb;
 452
 453       return (driDrawPriv->driverPrivate != NULL);
 454    }
 455 }
 456
 457 static void intelDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
 458 {
 459    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
 460 }
 461
 462
 463 /**
 464  * Get information about previous buffer swaps.
 465  */
 466 static int
 467 intelGetSwapInfo( __DRIdrawablePrivate *dPriv, __DRIswapInfo * sInfo )
 468 {
 469    struct intel_context *intel;
 470
 471    if ( (dPriv == NULL) || (dPriv->driContextPriv == NULL)
 472         || (dPriv->driContextPriv->driverPrivate == NULL)
 473         || (sInfo == NULL) ) {
 474       return -1;
 475    }
 476
 477    intel = dPriv->driContextPriv->driverPrivate;
 478    sInfo->swap_count = intel->swap_count;
 479    sInfo->swap_ust = intel->swap_ust;
 480    sInfo->swap_missed_count = intel->swap_missed_count;
 481
 482    sInfo->swap_missed_usage = (sInfo->swap_missed_count != 0)
 483        ? driCalculateSwapUsage( dPriv, 0, intel->swap_missed_ust )
 484        : 0.0;
 485
 486    return 0;
 487 }
 488
 489
 490 /* There are probably better ways to do this, such as an
 491  * init-designated function to register chipids and createcontext
 492  * functions.
 493  */
 494 extern GLboolean i830CreateContext( const __GLcontextModes *mesaVis,
 495                                     __DRIcontextPrivate *driContextPriv,
 496                                     void *sharedContextPrivate);
 497
 498 extern GLboolean i915CreateContext( const __GLcontextModes *mesaVis,
 499                                    __DRIcontextPrivate *driContextPriv,
 500                                    void *sharedContextPrivate);
 501
 502 extern GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
 503                                    __DRIcontextPrivate *driContextPriv,
 504                                    void *sharedContextPrivate);
 505
 506
 507
 508
 509 static GLboolean intelCreateContext( const __GLcontextModes *mesaVis,
 510                                    __DRIcontextPrivate *driContextPriv,
 511                                    void *sharedContextPrivate)
 512 {
 513 #if 0
 514    __DRIscreenPrivate *sPriv = driContextPriv->driScreenPriv;
 515    intelScreenPrivate *intelScreen = (intelScreenPrivate *)sPriv->private;
 516    switch (intelScreen->deviceID) {
 517    case PCI_CHIP_845_G:
 518    case PCI_CHIP_I830_M:
 519    case PCI_CHIP_I855_GM:
 520    case PCI_CHIP_I865_G:
 521       return i830CreateContext( mesaVis, driContextPriv,
 522                                 sharedContextPrivate );
 523
 524    case PCI_CHIP_I915_G:
 525    case PCI_CHIP_I915_GM:
 526    case PCI_CHIP_I945_G:
 527    case PCI_CHIP_I945_GM:
 528       return i915CreateContext( mesaVis, driContextPriv,
 529                                sharedContextPrivate );
 530
 531    default:
 532       fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
 533       return GL_FALSE;
 534    }
 535 #else
 536    return brwCreateContext( mesaVis, driContextPriv,
 537                             sharedContextPrivate );
 538 #endif
 539 }
 540
 541
 542 static const struct __DriverAPIRec intelAPI = {
 543    .InitDriver      = intelInitDriver,
 544    .DestroyScreen   = intelDestroyScreen,
 545    .CreateContext   = intelCreateContext,
 546    .DestroyContext  = intelDestroyContext,
 547    .CreateBuffer    = intelCreateBuffer,
 548    .DestroyBuffer   = intelDestroyBuffer,
 549    .SwapBuffers     = intelSwapBuffers,
 550    .MakeCurrent     = intelMakeCurrent,
 551    .UnbindContext   = intelUnbindContext,
 552    .GetSwapInfo     = intelGetSwapInfo,
 553    .GetMSC          = driGetMSC32,
 554    .WaitForMSC      = driWaitForMSC32,
 555    .WaitForSBC      = NULL,
 556    .SwapBuffersMSC  = NULL,
 557    .CopySubBuffer   = intelCopySubBuffer
 558 };
 559
 560
 561 static __GLcontextModes *
 562 intelFillInModes( unsigned pixel_bits, unsigned depth_bits,
 563                  unsigned stencil_bits, GLboolean have_back_buffer )
 564 {
 565    __GLcontextModes * modes;
 566    __GLcontextModes * m;
 567    unsigned num_modes;
 568    unsigned depth_buffer_factor;
 569    unsigned back_buffer_factor;
 570    GLenum fb_format;
 571    GLenum fb_type;
 572
 573    /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
 574     * support pageflipping at all.
 575     */
 576    static const GLenum back_buffer_modes[] = {
 577       GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 578    };
 579
 580    u_int8_t depth_bits_array[3];
 581    u_int8_t stencil_bits_array[3];
 582
 583
 584    depth_bits_array[0] = 0;
 585    depth_bits_array[1] = depth_bits;
 586    depth_bits_array[2] = depth_bits;
 587
 588    /* Just like with the accumulation buffer, always provide some modes
 589     * with a stencil buffer.  It will be a sw fallback, but some apps won't
 590     * care about that.
 591     */
 592    stencil_bits_array[0] = 0;
 593    stencil_bits_array[1] = 0;
 594    stencil_bits_array[2] = (stencil_bits == 0) ? 8 : stencil_bits;
 595
 596    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 3 : 1;
 597    back_buffer_factor  = (have_back_buffer) ? 3 : 1;
 598
 599    num_modes = depth_buffer_factor * back_buffer_factor * 4;
 600
 601     if ( pixel_bits == 16 ) {
 602         fb_format = GL_RGB;
 603         fb_type = GL_UNSIGNED_SHORT_5_6_5;
 604     }
 605     else {
 606         fb_format = GL_BGRA;
 607         fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
 608     }
 609
 610    modes = (*dri_interface->createContextModes)( num_modes, sizeof( __GLcontextModes ) );
 611    m = modes;
 612    if ( ! driFillInModes( & m, fb_format, fb_type,
 613                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 614                           back_buffer_modes, back_buffer_factor,
 615                           GLX_TRUE_COLOR ) ) {
 616         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 617                  __func__, __LINE__ );
 618         return NULL;
 619    }
 620    if ( ! driFillInModes( & m, fb_format, fb_type,
 621                           depth_bits_array, stencil_bits_array, depth_buffer_factor,
 622                           back_buffer_modes, back_buffer_factor,
 623                           GLX_DIRECT_COLOR ) ) {
 624         fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
 625                  __func__, __LINE__ );
 626         return NULL;
 627    }
 628
 629    /* Mark the visual as slow if there are "fake" stencil bits.
 630     */
 631    for ( m = modes ; m != NULL ; m = m->next ) {
 632       if ( (m->stencilBits != 0) && (m->stencilBits != stencil_bits) ) {
 633          m->visualRating = GLX_SLOW_CONFIG;
 634       }
 635    }
 636
 637    return modes;
 638 }
 639
 640
 641 /**
 642  * This is the bootstrap function for the driver.  libGL supplies all of the
 643  * requisite information about the system, and the driver initializes itself.
 644  * This routine also fills in the linked list pointed to by \c driver_modes
 645  * with the \c __GLcontextModes that the driver can support for windows or
 646  * pbuffers.
 647  *
 648  * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on
 649  *         failure.
 650  */
 651 PUBLIC
 652 void * __DRI_CREATE_NEW_SCREEN( int scrn, __DRIscreen *psc,
 653                                 const __GLcontextModes * modes,
 654                                 const __DRIversion * ddx_version,
 655                                 const __DRIversion * dri_version,
 656                                 const __DRIversion * drm_version,
 657                                 const __DRIframebuffer * frame_buffer,
 658                                 drmAddress pSAREA, int fd,
 659                                 int internal_api_version,
 660                                 const __DRIinterfaceMethods * interface,
 661                                 __GLcontextModes ** driver_modes )
 662
 663 {
 664    __DRIscreenPrivate *psp;
 665    static const __DRIversion ddx_expected = { 1, 6, 0 };
 666    static const __DRIversion dri_expected = { 4, 0, 0 };
 667    static const __DRIversion drm_expected = { 1, 3, 0 };
 668
 669    dri_interface = interface;
 670
 671    if ( ! driCheckDriDdxDrmVersions2( "i915",
 672                                       dri_version, & dri_expected,
 673                                       ddx_version, & ddx_expected,
 674                                       drm_version, & drm_expected ) ) {
 675       return NULL;
 676    }
 677
 678    psp = __driUtilCreateNewScreen(scrn, psc, NULL,
 679                                   ddx_version, dri_version, drm_version,
 680                                   frame_buffer, pSAREA, fd,
 681                                   internal_api_version, &intelAPI);
 682    if ( psp != NULL ) {
 683       I830DRIPtr dri_priv = (I830DRIPtr) psp->pDevPriv;
 684       *driver_modes = intelFillInModes( dri_priv->cpp * 8,
 685                                         (dri_priv->cpp == 2) ? 16 : 24,
 686                                         (dri_priv->cpp == 2) ? 0  : 8,
 687                                         GL_TRUE );
 688       /* Calling driInitExtensions here, with a NULL context pointer, does not actually
 689        * enable the extensions.  It just makes sure that all the dispatch offsets for all
 690        * the extensions that *might* be enables are known.  This is needed because the
 691        * dispatch offsets need to be known when _mesa_context_create is called, but we can't
 692        * enable the extensions until we have a context pointer.
 693        *
 694        * Hello chicken.  Hello egg.  How are you two today?
 695        */
 696       intelInitExtensions(NULL, GL_FALSE);
 697    }
 698
 699    return (void *) psp;
 700 }