src/mesa/drivers/dri/intel/intel_context.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
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/extensions.h"
  32 #include "main/framebuffer.h"
  33 #include "main/imports.h"
  34 #include "main/points.h"
  35
  36 #include "swrast/swrast.h"
  37 #include "swrast_setup/swrast_setup.h"
  38 #include "tnl/tnl.h"
  39 #include "drivers/common/driverfuncs.h"
  40 #include "drivers/common/meta.h"
  41
  42 #include "i830_dri.h"
  43
  44 #include "intel_chipset.h"
  45 #include "intel_buffers.h"
  46 #include "intel_tex.h"
  47 #include "intel_batchbuffer.h"
  48 #include "intel_clear.h"
  49 #include "intel_extensions.h"
  50 #include "intel_pixel.h"
  51 #include "intel_regions.h"
  52 #include "intel_buffer_objects.h"
  53 #include "intel_fbo.h"
  54 #include "intel_bufmgr.h"
  55 #include "intel_screen.h"
  56
  57 #include "drirenderbuffer.h"
  58 #include "utils.h"
  59
  60
  61 #ifndef INTEL_DEBUG
  62 int INTEL_DEBUG = (0);
  63 #endif
  64
  65
  66 #define DRIVER_DATE                     "20100330 DEVELOPMENT"
  67 #define DRIVER_DATE_GEM                 "GEM " DRIVER_DATE
  68
  69
  70 static const GLubyte *
  71 intelGetString(GLcontext * ctx, GLenum name)
  72 {
  73    const struct intel_context *const intel = intel_context(ctx);
  74    const char *chipset;
  75    static char buffer[128];
  76
  77    switch (name) {
  78    case GL_VENDOR:
  79       return (GLubyte *) "Tungsten Graphics, Inc";
  80       break;
  81
  82    case GL_RENDERER:
  83       switch (intel->intelScreen->deviceID) {
  84       case PCI_CHIP_845_G:
  85          chipset = "Intel(R) 845G";
  86          break;
  87       case PCI_CHIP_I830_M:
  88          chipset = "Intel(R) 830M";
  89          break;
  90       case PCI_CHIP_I855_GM:
  91          chipset = "Intel(R) 852GM/855GM";
  92          break;
  93       case PCI_CHIP_I865_G:
  94          chipset = "Intel(R) 865G";
  95          break;
  96       case PCI_CHIP_I915_G:
  97          chipset = "Intel(R) 915G";
  98          break;
  99       case PCI_CHIP_E7221_G:
 100          chipset = "Intel (R) E7221G (i915)";
 101          break;
 102       case PCI_CHIP_I915_GM:
 103          chipset = "Intel(R) 915GM";
 104          break;
 105       case PCI_CHIP_I945_G:
 106          chipset = "Intel(R) 945G";
 107          break;
 108       case PCI_CHIP_I945_GM:
 109          chipset = "Intel(R) 945GM";
 110          break;
 111       case PCI_CHIP_I945_GME:
 112          chipset = "Intel(R) 945GME";
 113          break;
 114       case PCI_CHIP_G33_G:
 115          chipset = "Intel(R) G33";
 116          break;
 117       case PCI_CHIP_Q35_G:
 118          chipset = "Intel(R) Q35";
 119          break;
 120       case PCI_CHIP_Q33_G:
 121          chipset = "Intel(R) Q33";
 122          break;
 123       case PCI_CHIP_IGD_GM:
 124       case PCI_CHIP_IGD_G:
 125          chipset = "Intel(R) IGD";
 126          break;
 127       case PCI_CHIP_I965_Q:
 128          chipset = "Intel(R) 965Q";
 129          break;
 130       case PCI_CHIP_I965_G:
 131       case PCI_CHIP_I965_G_1:
 132          chipset = "Intel(R) 965G";
 133          break;
 134       case PCI_CHIP_I946_GZ:
 135          chipset = "Intel(R) 946GZ";
 136          break;
 137       case PCI_CHIP_I965_GM:
 138          chipset = "Intel(R) 965GM";
 139          break;
 140       case PCI_CHIP_I965_GME:
 141          chipset = "Intel(R) 965GME/GLE";
 142          break;
 143       case PCI_CHIP_GM45_GM:
 144          chipset = "Mobile Intel® GM45 Express Chipset";
 145          break;
 146       case PCI_CHIP_IGD_E_G:
 147          chipset = "Intel(R) Integrated Graphics Device";
 148          break;
 149       case PCI_CHIP_G45_G:
 150          chipset = "Intel(R) G45/G43";
 151          break;
 152       case PCI_CHIP_Q45_G:
 153          chipset = "Intel(R) Q45/Q43";
 154          break;
 155       case PCI_CHIP_G41_G:
 156          chipset = "Intel(R) G41";
 157          break;
 158       case PCI_CHIP_B43_G:
 159          chipset = "Intel(R) B43";
 160          break;
 161       case PCI_CHIP_ILD_G:
 162          chipset = "Intel(R) IGDNG_D";
 163          break;
 164       case PCI_CHIP_ILM_G:
 165          chipset = "Intel(R) IGDNG_M";
 166          break;
 167       default:
 168          chipset = "Unknown Intel Chipset";
 169          break;
 170       }
 171
 172       (void) driGetRendererString(buffer, chipset, DRIVER_DATE_GEM, 0);
 173       return (GLubyte *) buffer;
 174
 175    default:
 176       return NULL;
 177    }
 178 }
 179
 180 static unsigned
 181 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
 182 {
 183    return _mesa_get_format_bytes(rb->Base.Format) * 8;
 184 }
 185
 186 void
 187 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
 188 {
 189    struct gl_framebuffer *fb = drawable->driverPrivate;
 190    struct intel_renderbuffer *rb;
 191    struct intel_region *region, *depth_region;
 192    struct intel_context *intel = context->driverPrivate;
 193    struct intel_renderbuffer *front_rb, *back_rb, *depth_rb, *stencil_rb;
 194    __DRIbuffer *buffers = NULL;
 195    __DRIscreen *screen;
 196    int i, count;
 197    unsigned int attachments[10];
 198    const char *region_name;
 199
 200    /* If we're rendering to the fake front buffer, make sure all the
 201     * pending drawing has landed on the real front buffer.  Otherwise
 202     * when we eventually get to DRI2GetBuffersWithFormat the stale
 203     * real front buffer contents will get copied to the new fake front
 204     * buffer.
 205     */
 206    if (intel->is_front_buffer_rendering)
 207       intel_flush(&intel->ctx, GL_FALSE);
 208
 209    /* Set this up front, so that in case our buffers get invalidated
 210     * while we're getting new buffers, we don't clobber the stamp and
 211     * thus ignore the invalidate. */
 212    drawable->lastStamp = drawable->dri2.stamp;
 213
 214    if (INTEL_DEBUG & DEBUG_DRI)
 215       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 216
 217    screen = intel->intelScreen->driScrnPriv;
 218
 219    if (screen->dri2.loader
 220        && (screen->dri2.loader->base.version > 2)
 221        && (screen->dri2.loader->getBuffersWithFormat != NULL)) {
 222
 223       front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 224       back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 225       depth_rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 226       stencil_rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 227
 228       i = 0;
 229       if ((intel->is_front_buffer_rendering ||
 230            intel->is_front_buffer_reading ||
 231            !back_rb) && front_rb) {
 232          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 233          attachments[i++] = intel_bits_per_pixel(front_rb);
 234       }
 235
 236       if (back_rb) {
 237          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 238          attachments[i++] = intel_bits_per_pixel(back_rb);
 239       }
 240
 241       if ((depth_rb != NULL) && (stencil_rb != NULL)) {
 242          attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
 243          attachments[i++] = intel_bits_per_pixel(depth_rb);
 244       } else if (depth_rb != NULL) {
 245          attachments[i++] = __DRI_BUFFER_DEPTH;
 246          attachments[i++] = intel_bits_per_pixel(depth_rb);
 247       } else if (stencil_rb != NULL) {
 248          attachments[i++] = __DRI_BUFFER_STENCIL;
 249          attachments[i++] = intel_bits_per_pixel(stencil_rb);
 250       }
 251
 252       buffers =
 253          (*screen->dri2.loader->getBuffersWithFormat)(drawable,
 254                                                       &drawable->w,
 255                                                       &drawable->h,
 256                                                       attachments, i / 2,
 257                                                       &count,
 258                                                       drawable->loaderPrivate);
 259    } else if (screen->dri2.loader) {
 260       i = 0;
 261       if (intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT))
 262          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 263       if (intel_get_renderbuffer(fb, BUFFER_BACK_LEFT))
 264          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 265       if (intel_get_renderbuffer(fb, BUFFER_DEPTH))
 266          attachments[i++] = __DRI_BUFFER_DEPTH;
 267       if (intel_get_renderbuffer(fb, BUFFER_STENCIL))
 268          attachments[i++] = __DRI_BUFFER_STENCIL;
 269
 270       buffers = (*screen->dri2.loader->getBuffers)(drawable,
 271                                                    &drawable->w,
 272                                                    &drawable->h,
 273                                                    attachments, i,
 274                                                    &count,
 275                                                    drawable->loaderPrivate);
 276    }
 277
 278    if (buffers == NULL)
 279       return;
 280
 281    drawable->x = 0;
 282    drawable->y = 0;
 283    drawable->backX = 0;
 284    drawable->backY = 0;
 285    drawable->numClipRects = 1;
 286    drawable->pClipRects[0].x1 = 0;
 287    drawable->pClipRects[0].y1 = 0;
 288    drawable->pClipRects[0].x2 = drawable->w;
 289    drawable->pClipRects[0].y2 = drawable->h;
 290    drawable->numBackClipRects = 1;
 291    drawable->pBackClipRects[0].x1 = 0;
 292    drawable->pBackClipRects[0].y1 = 0;
 293    drawable->pBackClipRects[0].x2 = drawable->w;
 294    drawable->pBackClipRects[0].y2 = drawable->h;
 295
 296    depth_region = NULL;
 297    for (i = 0; i < count; i++) {
 298        switch (buffers[i].attachment) {
 299        case __DRI_BUFFER_FRONT_LEFT:
 300            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 301            region_name = "dri2 front buffer";
 302            break;
 303
 304        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 305            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 306            region_name = "dri2 fake front buffer";
 307            break;
 308
 309        case __DRI_BUFFER_BACK_LEFT:
 310            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 311            region_name = "dri2 back buffer";
 312            break;
 313
 314        case __DRI_BUFFER_DEPTH:
 315            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 316            region_name = "dri2 depth buffer";
 317            break;
 318
 319        case __DRI_BUFFER_DEPTH_STENCIL:
 320            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 321            region_name = "dri2 depth / stencil buffer";
 322            break;
 323
 324        case __DRI_BUFFER_STENCIL:
 325            rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 326            region_name = "dri2 stencil buffer";
 327            break;
 328
 329        case __DRI_BUFFER_ACCUM:
 330        default:
 331            fprintf(stderr,
 332                    "unhandled buffer attach event, attacment type %d\n",
 333                    buffers[i].attachment);
 334            return;
 335        }
 336
 337        if (rb == NULL)
 338           continue;
 339
 340        if (rb->region && rb->region->name == buffers[i].name)
 341              continue;
 342
 343        if (INTEL_DEBUG & DEBUG_DRI)
 344           fprintf(stderr,
 345                   "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 346                   buffers[i].name, buffers[i].attachment,
 347                   buffers[i].cpp, buffers[i].pitch);
 348
 349        if (buffers[i].attachment == __DRI_BUFFER_STENCIL && depth_region) {
 350           if (INTEL_DEBUG & DEBUG_DRI)
 351              fprintf(stderr, "(reusing depth buffer as stencil)\n");
 352           intel_region_reference(&region, depth_region);
 353        }
 354        else
 355           region = intel_region_alloc_for_handle(intel, buffers[i].cpp,
 356                                                  drawable->w,
 357                                                  drawable->h,
 358                                                  buffers[i].pitch / buffers[i].cpp,
 359                                                  buffers[i].name,
 360                                                  region_name);
 361
 362        if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
 363           depth_region = region;
 364
 365        intel_renderbuffer_set_region(rb, region);
 366        intel_region_release(&region);
 367
 368        if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
 369           rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 370           if (rb != NULL) {
 371              struct intel_region *stencil_region = NULL;
 372
 373              if (rb->region && rb->region->name == buffers[i].name)
 374                    continue;
 375
 376              intel_region_reference(&stencil_region, region);
 377              intel_renderbuffer_set_region(rb, stencil_region);
 378              intel_region_release(&stencil_region);
 379           }
 380        }
 381    }
 382
 383    driUpdateFramebufferSize(&intel->ctx, drawable);
 384 }
 385
 386 void
 387 intel_prepare_render(struct intel_context *intel)
 388 {
 389    __DRIcontext *driContext = intel->driContext;
 390    __DRIdrawable *drawable;
 391
 392    drawable = driContext->driDrawablePriv;
 393    if (drawable->dri2.stamp != driContext->dri2.draw_stamp) {
 394       if (drawable->lastStamp != drawable->dri2.stamp)
 395          intel_update_renderbuffers(driContext, drawable);
 396       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 397       driContext->dri2.draw_stamp = drawable->dri2.stamp;
 398    }
 399
 400    drawable = driContext->driReadablePriv;
 401    if (drawable->dri2.stamp != driContext->dri2.read_stamp) {
 402       if (drawable->lastStamp != drawable->dri2.stamp)
 403          intel_update_renderbuffers(driContext, drawable);
 404       driContext->dri2.read_stamp = drawable->dri2.stamp;
 405    }
 406 }
 407
 408 void
 409 intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 410 {
 411     struct intel_context *intel = intel_context(ctx);
 412     __DRIcontext *driContext = intel->driContext;
 413
 414     if (!intel->using_dri2_swapbuffers &&
 415         !intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
 416        dri2InvalidateDrawable(driContext->driDrawablePriv);
 417        dri2InvalidateDrawable(driContext->driReadablePriv);
 418     }
 419 }
 420
 421 static const struct dri_debug_control debug_control[] = {
 422    { "tex",   DEBUG_TEXTURE},
 423    { "state", DEBUG_STATE},
 424    { "ioctl", DEBUG_IOCTL},
 425    { "blit",  DEBUG_BLIT},
 426    { "mip",   DEBUG_MIPTREE},
 427    { "fall",  DEBUG_FALLBACKS},
 428    { "verb",  DEBUG_VERBOSE},
 429    { "bat",   DEBUG_BATCH},
 430    { "pix",   DEBUG_PIXEL},
 431    { "buf",   DEBUG_BUFMGR},
 432    { "reg",   DEBUG_REGION},
 433    { "fbo",   DEBUG_FBO},
 434    { "lock",  DEBUG_LOCK},
 435    { "sync",  DEBUG_SYNC},
 436    { "prim",  DEBUG_PRIMS },
 437    { "vert",  DEBUG_VERTS },
 438    { "dri",   DEBUG_DRI },
 439    { "dma",   DEBUG_DMA },
 440    { "san",   DEBUG_SANITY },
 441    { "sleep", DEBUG_SLEEP },
 442    { "stats", DEBUG_STATS },
 443    { "tile",  DEBUG_TILE },
 444    { "sing",  DEBUG_SINGLE_THREAD },
 445    { "thre",  DEBUG_SINGLE_THREAD },
 446    { "wm",    DEBUG_WM },
 447    { "glsl_force", DEBUG_GLSL_FORCE },
 448    { "urb",   DEBUG_URB },
 449    { "vs",    DEBUG_VS },
 450    { NULL,    0 }
 451 };
 452
 453
 454 static void
 455 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 456 {
 457     struct intel_context *intel = intel_context(ctx);
 458
 459    _swrast_InvalidateState(ctx, new_state);
 460    _swsetup_InvalidateState(ctx, new_state);
 461    _vbo_InvalidateState(ctx, new_state);
 462    _tnl_InvalidateState(ctx, new_state);
 463    _tnl_invalidate_vertex_state(ctx, new_state);
 464
 465    intel->NewGLState |= new_state;
 466
 467    if (intel->vtbl.invalidate_state)
 468       intel->vtbl.invalidate_state( intel, new_state );
 469 }
 470
 471 void
 472 intel_flush(GLcontext *ctx, GLboolean needs_mi_flush)
 473 {
 474    struct intel_context *intel = intel_context(ctx);
 475     __DRIcontext *driContext = intel->driContext;
 476
 477    if (intel->Fallback)
 478       _swrast_flush(ctx);
 479
 480    if (intel->gen < 4)
 481       INTEL_FIREVERTICES(intel);
 482
 483    if (intel->batch->map != intel->batch->ptr)
 484       intel_batchbuffer_flush(intel->batch);
 485
 486    if ((ctx->DrawBuffer->Name == 0) && intel->front_buffer_dirty) {
 487       __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 488
 489       if (screen->dri2.loader &&
 490           (screen->dri2.loader->base.version >= 2)
 491           && (screen->dri2.loader->flushFrontBuffer != NULL) &&
 492           driContext->driDrawablePriv &&
 493           driContext->driDrawablePriv->loaderPrivate) {
 494          (*screen->dri2.loader->flushFrontBuffer)(driContext->driDrawablePriv,
 495                                                   driContext->driDrawablePriv->loaderPrivate);
 496
 497          /* Only clear the dirty bit if front-buffer rendering is no longer
 498           * enabled.  This is done so that the dirty bit can only be set in
 499           * glDrawBuffer.  Otherwise the dirty bit would have to be set at
 500           * each of N places that do rendering.  This has worse performances,
 501           * but it is much easier to get correct.
 502           */
 503          if (!intel->is_front_buffer_rendering) {
 504             intel->front_buffer_dirty = GL_FALSE;
 505          }
 506       }
 507    }
 508 }
 509
 510 void
 511 intelFlush(GLcontext * ctx)
 512 {
 513    intel_flush(ctx, GL_FALSE);
 514 }
 515
 516 static void
 517 intel_glFlush(GLcontext *ctx)
 518 {
 519    struct intel_context *intel = intel_context(ctx);
 520
 521    intel_flush(ctx, GL_TRUE);
 522
 523    /* We're using glFlush as an indicator that a frame is done, which is
 524     * what DRI2 does before calling SwapBuffers (and means we should catch
 525     * people doing front-buffer rendering, as well)..
 526     *
 527     * Wait for the swapbuffers before the one we just emitted, so we don't
 528     * get too many swaps outstanding for apps that are GPU-heavy but not
 529     * CPU-heavy.
 530     *
 531     * Unfortunately, we don't have a handle to the batch containing the swap,
 532     * and getting our hands on that doesn't seem worth it, so we just us the
 533     * first batch we emitted after the last swap.
 534     */
 535    if (!intel->using_dri2_swapbuffers &&
 536        intel->first_post_swapbuffers_batch != NULL) {
 537       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
 538       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 539       intel->first_post_swapbuffers_batch = NULL;
 540    }
 541 }
 542
 543 void
 544 intelFinish(GLcontext * ctx)
 545 {
 546    struct gl_framebuffer *fb = ctx->DrawBuffer;
 547    int i;
 548
 549    intelFlush(ctx);
 550
 551    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 552        struct intel_renderbuffer *irb;
 553
 554        irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 555
 556        if (irb && irb->region)
 557           dri_bo_wait_rendering(irb->region->buffer);
 558    }
 559    if (fb->_DepthBuffer) {
 560       /* XXX: Wait on buffer idle */
 561    }
 562 }
 563
 564 void
 565 intelInitDriverFunctions(struct dd_function_table *functions)
 566 {
 567    _mesa_init_driver_functions(functions);
 568
 569    functions->Flush = intel_glFlush;
 570    functions->Finish = intelFinish;
 571    functions->GetString = intelGetString;
 572    functions->UpdateState = intelInvalidateState;
 573
 574    intelInitTextureFuncs(functions);
 575    intelInitTextureImageFuncs(functions);
 576    intelInitTextureSubImageFuncs(functions);
 577    intelInitTextureCopyImageFuncs(functions);
 578    intelInitStateFuncs(functions);
 579    intelInitClearFuncs(functions);
 580    intelInitBufferFuncs(functions);
 581    intelInitPixelFuncs(functions);
 582    intelInitBufferObjectFuncs(functions);
 583    intel_init_syncobj_functions(functions);
 584 }
 585
 586
 587 GLboolean
 588 intelInitContext(struct intel_context *intel,
 589                  const __GLcontextModes * mesaVis,
 590                  __DRIcontext * driContextPriv,
 591                  void *sharedContextPrivate,
 592                  struct dd_function_table *functions)
 593 {
 594    GLcontext *ctx = &intel->ctx;
 595    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 596    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 597    struct intel_screen *intelScreen = sPriv->private;
 598    int bo_reuse_mode;
 599
 600    /* we can't do anything without a connection to the device */
 601    if (intelScreen->bufmgr == NULL)
 602       return GL_FALSE;
 603
 604    if (!_mesa_initialize_context(&intel->ctx, mesaVis, shareCtx,
 605                                  functions, (void *) intel)) {
 606       printf("%s: failed to init mesa context\n", __FUNCTION__);
 607       return GL_FALSE;
 608    }
 609
 610    driContextPriv->driverPrivate = intel;
 611    intel->intelScreen = intelScreen;
 612    intel->driContext = driContextPriv;
 613    intel->driFd = sPriv->fd;
 614
 615    if (IS_GEN6(intel->intelScreen->deviceID)) {
 616       intel->gen = 6;
 617       intel->needs_ff_sync = GL_TRUE;
 618       intel->has_luminance_srgb = GL_TRUE;
 619    } else if (IS_965(intel->intelScreen->deviceID)) {
 620       intel->gen = 4;
 621    } else if (IS_9XX(intel->intelScreen->deviceID)) {
 622       intel->gen = 3;
 623       if (IS_945(intel->intelScreen->deviceID)) {
 624          intel->is_945 = GL_TRUE;
 625       }
 626    } else {
 627       intel->gen = 2;
 628    }
 629
 630    if (IS_IGDNG(intel->intelScreen->deviceID)) {
 631       intel->is_ironlake = GL_TRUE;
 632       intel->needs_ff_sync = GL_TRUE;
 633       intel->has_luminance_srgb = GL_TRUE;
 634    } else if (IS_G4X(intel->intelScreen->deviceID)) {
 635       intel->has_luminance_srgb = GL_TRUE;
 636       intel->is_g4x = GL_TRUE;
 637    }
 638
 639    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 640                        sPriv->myNum, (intel->gen >= 4) ? "i965" : "i915");
 641    if (intelScreen->deviceID == PCI_CHIP_I865_G)
 642       intel->maxBatchSize = 4096;
 643    else
 644       intel->maxBatchSize = BATCH_SZ;
 645
 646    intel->bufmgr = intelScreen->bufmgr;
 647
 648    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
 649    switch (bo_reuse_mode) {
 650    case DRI_CONF_BO_REUSE_DISABLED:
 651       break;
 652    case DRI_CONF_BO_REUSE_ALL:
 653       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
 654       break;
 655    }
 656
 657    /* This doesn't yet catch all non-conformant rendering, but it's a
 658     * start.
 659     */
 660    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 661       unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
 662       if (value > 0) {
 663          intel->conformance_mode = value;
 664       }
 665       else {
 666          intel->conformance_mode = 1;
 667       }
 668    }
 669
 670    if (intel->conformance_mode > 0) {
 671       ctx->Const.MinLineWidth = 1.0;
 672       ctx->Const.MinLineWidthAA = 1.0;
 673       ctx->Const.MaxLineWidth = 1.0;
 674       ctx->Const.MaxLineWidthAA = 1.0;
 675       ctx->Const.LineWidthGranularity = 1.0;
 676    }
 677    else {
 678       ctx->Const.MinLineWidth = 1.0;
 679       ctx->Const.MinLineWidthAA = 1.0;
 680       ctx->Const.MaxLineWidth = 5.0;
 681       ctx->Const.MaxLineWidthAA = 5.0;
 682       ctx->Const.LineWidthGranularity = 0.5;
 683    }
 684
 685    ctx->Const.MinPointSize = 1.0;
 686    ctx->Const.MinPointSizeAA = 1.0;
 687    ctx->Const.MaxPointSize = 255.0;
 688    ctx->Const.MaxPointSizeAA = 3.0;
 689    ctx->Const.PointSizeGranularity = 1.0;
 690
 691    /* reinitialize the context point state.
 692     * It depend on constants in __GLcontextRec::Const
 693     */
 694    _mesa_init_point(ctx);
 695
 696    meta_init_metaops(ctx, &intel->meta);
 697    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 698    if (intel->gen >= 4) {
 699       if (MAX_WIDTH > 8192)
 700          ctx->Const.MaxRenderbufferSize = 8192;
 701    } else {
 702       if (MAX_WIDTH > 2048)
 703          ctx->Const.MaxRenderbufferSize = 2048;
 704    }
 705
 706    /* Initialize the software rasterizer and helper modules. */
 707    _swrast_CreateContext(ctx);
 708    _vbo_CreateContext(ctx);
 709    _tnl_CreateContext(ctx);
 710    _swsetup_CreateContext(ctx);
 711
 712    /* Configure swrast to match hardware characteristics: */
 713    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 714    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 715
 716    _mesa_meta_init(ctx);
 717
 718    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 719    intel->hw_stipple = 1;
 720
 721    /* XXX FBO: this doesn't seem to be used anywhere */
 722    switch (mesaVis->depthBits) {
 723    case 0:                     /* what to do in this case? */
 724    case 16:
 725       intel->polygon_offset_scale = 1.0;
 726       break;
 727    case 24:
 728       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
 729       break;
 730    default:
 731       assert(0);
 732       break;
 733    }
 734
 735    if (intel->gen >= 4)
 736       intel->polygon_offset_scale /= 0xffff;
 737
 738    intel->RenderIndex = ~0;
 739
 740    intelInitExtensions(ctx);
 741
 742    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 743    if (INTEL_DEBUG & DEBUG_BUFMGR)
 744       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 745
 746    intel->batch = intel_batchbuffer_alloc(intel);
 747
 748    intel_fbo_init(intel);
 749
 750    if (intel->ctx.Mesa_DXTn) {
 751       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 752       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 753    }
 754    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 755       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 756    }
 757    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
 758                                                "texture_tiling");
 759    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
 760
 761    intel->prim.primitive = ~0;
 762
 763    /* Force all software fallbacks */
 764    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 765       fprintf(stderr, "disabling 3D rasterization\n");
 766       intel->no_rast = 1;
 767    }
 768
 769    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
 770       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 771       intel->always_flush_batch = 1;
 772    }
 773
 774    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
 775       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 776       intel->always_flush_cache = 1;
 777    }
 778
 779    /* Disable all hardware rendering (skip emitting batches and fences/waits
 780     * to the kernel)
 781     */
 782    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 783
 784    return GL_TRUE;
 785 }
 786
 787 void
 788 intelDestroyContext(__DRIcontext * driContextPriv)
 789 {
 790    struct intel_context *intel =
 791       (struct intel_context *) driContextPriv->driverPrivate;
 792
 793    assert(intel);               /* should never be null */
 794    if (intel) {
 795       GLboolean release_texture_heaps;
 796
 797       INTEL_FIREVERTICES(intel);
 798
 799       _mesa_meta_free(&intel->ctx);
 800
 801       meta_destroy_metaops(&intel->meta);
 802
 803       intel->vtbl.destroy(intel);
 804
 805       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 806       _swsetup_DestroyContext(&intel->ctx);
 807       _tnl_DestroyContext(&intel->ctx);
 808       _vbo_DestroyContext(&intel->ctx);
 809
 810       _swrast_DestroyContext(&intel->ctx);
 811       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
 812
 813       intel_batchbuffer_free(intel->batch);
 814       intel->batch = NULL;
 815
 816       free(intel->prim.vb);
 817       intel->prim.vb = NULL;
 818       dri_bo_unreference(intel->prim.vb_bo);
 819       intel->prim.vb_bo = NULL;
 820       dri_bo_unreference(intel->first_post_swapbuffers_batch);
 821       intel->first_post_swapbuffers_batch = NULL;
 822
 823       if (release_texture_heaps) {
 824          /* Nothing is currently done here to free texture heaps;
 825           * but we're not using the texture heap utilities, so I
 826           * rather think we shouldn't.  I've taken a look, and can't
 827           * find any private texture data hanging around anywhere, but
 828           * I'm not yet certain there isn't any at all...
 829           */
 830          /* if (INTEL_DEBUG & DEBUG_TEXTURE)
 831             fprintf(stderr, "do something to free texture heaps\n");
 832           */
 833       }
 834
 835       driDestroyOptionCache(&intel->optionCache);
 836
 837       /* free the Mesa context */
 838       _mesa_free_context_data(&intel->ctx);
 839
 840       FREE(intel);
 841       driContextPriv->driverPrivate = NULL;
 842    }
 843 }
 844
 845 GLboolean
 846 intelUnbindContext(__DRIcontext * driContextPriv)
 847 {
 848    return GL_TRUE;
 849 }
 850
 851 GLboolean
 852 intelMakeCurrent(__DRIcontext * driContextPriv,
 853                  __DRIdrawable * driDrawPriv,
 854                  __DRIdrawable * driReadPriv)
 855 {
 856    struct intel_context *intel;
 857    GET_CURRENT_CONTEXT(curCtx);
 858
 859    if (driContextPriv)
 860       intel = (struct intel_context *) driContextPriv->driverPrivate;
 861    else
 862       intel = NULL;
 863
 864    /* According to the glXMakeCurrent() man page: "Pending commands to
 865     * the previous context, if any, are flushed before it is released."
 866     * But only flush if we're actually changing contexts.
 867     */
 868    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
 869       _mesa_flush(curCtx);
 870    }
 871
 872    if (driContextPriv) {
 873       struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 874       struct gl_framebuffer *readFb = driReadPriv->driverPrivate;
 875
 876       driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 877       driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 878       intel_prepare_render(intel);
 879       _mesa_make_current(&intel->ctx, fb, readFb);
 880    }
 881    else {
 882       _mesa_make_current(NULL, NULL, NULL);
 883    }
 884
 885    return GL_TRUE;
 886 }