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                     "20091221 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    if (INTEL_DEBUG & DEBUG_DRI)
 210       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 211
 212    screen = intel->intelScreen->driScrnPriv;
 213
 214    if (screen->dri2.loader
 215        && (screen->dri2.loader->base.version > 2)
 216        && (screen->dri2.loader->getBuffersWithFormat != NULL)) {
 217
 218       front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 219       back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 220       depth_rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 221       stencil_rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 222
 223       i = 0;
 224       if ((intel->is_front_buffer_rendering ||
 225            intel->is_front_buffer_reading ||
 226            !back_rb) && front_rb) {
 227          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 228          attachments[i++] = intel_bits_per_pixel(front_rb);
 229       }
 230
 231       if (back_rb) {
 232          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 233          attachments[i++] = intel_bits_per_pixel(back_rb);
 234       }
 235
 236       if ((depth_rb != NULL) && (stencil_rb != NULL)) {
 237          attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
 238          attachments[i++] = intel_bits_per_pixel(depth_rb);
 239       } else if (depth_rb != NULL) {
 240          attachments[i++] = __DRI_BUFFER_DEPTH;
 241          attachments[i++] = intel_bits_per_pixel(depth_rb);
 242       } else if (stencil_rb != NULL) {
 243          attachments[i++] = __DRI_BUFFER_STENCIL;
 244          attachments[i++] = intel_bits_per_pixel(stencil_rb);
 245       }
 246
 247       buffers =
 248          (*screen->dri2.loader->getBuffersWithFormat)(drawable,
 249                                                       &drawable->w,
 250                                                       &drawable->h,
 251                                                       attachments, i / 2,
 252                                                       &count,
 253                                                       drawable->loaderPrivate);
 254    } else if (screen->dri2.loader) {
 255       i = 0;
 256       if (intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT))
 257          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 258       if (intel_get_renderbuffer(fb, BUFFER_BACK_LEFT))
 259          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 260       if (intel_get_renderbuffer(fb, BUFFER_DEPTH))
 261          attachments[i++] = __DRI_BUFFER_DEPTH;
 262       if (intel_get_renderbuffer(fb, BUFFER_STENCIL))
 263          attachments[i++] = __DRI_BUFFER_STENCIL;
 264
 265       buffers = (*screen->dri2.loader->getBuffers)(drawable,
 266                                                    &drawable->w,
 267                                                    &drawable->h,
 268                                                    attachments, i,
 269                                                    &count,
 270                                                    drawable->loaderPrivate);
 271    }
 272
 273    if (buffers == NULL)
 274       return;
 275
 276    drawable->x = 0;
 277    drawable->y = 0;
 278    drawable->backX = 0;
 279    drawable->backY = 0;
 280    drawable->numClipRects = 1;
 281    drawable->pClipRects[0].x1 = 0;
 282    drawable->pClipRects[0].y1 = 0;
 283    drawable->pClipRects[0].x2 = drawable->w;
 284    drawable->pClipRects[0].y2 = drawable->h;
 285    drawable->numBackClipRects = 1;
 286    drawable->pBackClipRects[0].x1 = 0;
 287    drawable->pBackClipRects[0].y1 = 0;
 288    drawable->pBackClipRects[0].x2 = drawable->w;
 289    drawable->pBackClipRects[0].y2 = drawable->h;
 290
 291    depth_region = NULL;
 292    for (i = 0; i < count; i++) {
 293        switch (buffers[i].attachment) {
 294        case __DRI_BUFFER_FRONT_LEFT:
 295            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 296            region_name = "dri2 front buffer";
 297            break;
 298
 299        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 300            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 301            region_name = "dri2 fake front buffer";
 302            break;
 303
 304        case __DRI_BUFFER_BACK_LEFT:
 305            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 306            region_name = "dri2 back buffer";
 307            break;
 308
 309        case __DRI_BUFFER_DEPTH:
 310            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 311            region_name = "dri2 depth buffer";
 312            break;
 313
 314        case __DRI_BUFFER_DEPTH_STENCIL:
 315            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 316            region_name = "dri2 depth / stencil buffer";
 317            break;
 318
 319        case __DRI_BUFFER_STENCIL:
 320            rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 321            region_name = "dri2 stencil buffer";
 322            break;
 323
 324        case __DRI_BUFFER_ACCUM:
 325        default:
 326            fprintf(stderr,
 327                    "unhandled buffer attach event, attacment type %d\n",
 328                    buffers[i].attachment);
 329            return;
 330        }
 331
 332        if (rb == NULL)
 333           continue;
 334
 335        if (rb->region && rb->region->name == buffers[i].name)
 336              continue;
 337
 338        if (INTEL_DEBUG & DEBUG_DRI)
 339           fprintf(stderr,
 340                   "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 341                   buffers[i].name, buffers[i].attachment,
 342                   buffers[i].cpp, buffers[i].pitch);
 343
 344        if (buffers[i].attachment == __DRI_BUFFER_STENCIL && depth_region) {
 345           if (INTEL_DEBUG & DEBUG_DRI)
 346              fprintf(stderr, "(reusing depth buffer as stencil)\n");
 347           intel_region_reference(&region, depth_region);
 348        }
 349        else
 350           region = intel_region_alloc_for_handle(intel, buffers[i].cpp,
 351                                                  drawable->w,
 352                                                  drawable->h,
 353                                                  buffers[i].pitch / buffers[i].cpp,
 354                                                  buffers[i].name,
 355                                                  region_name);
 356
 357        if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
 358           depth_region = region;
 359
 360        intel_renderbuffer_set_region(rb, region);
 361        intel_region_release(&region);
 362
 363        if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
 364           rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 365           if (rb != NULL) {
 366              struct intel_region *stencil_region = NULL;
 367
 368              if (rb->region && rb->region->name == buffers[i].name)
 369                    continue;
 370
 371              intel_region_reference(&stencil_region, region);
 372              intel_renderbuffer_set_region(rb, stencil_region);
 373              intel_region_release(&stencil_region);
 374           }
 375        }
 376    }
 377
 378    driUpdateFramebufferSize(&intel->ctx, drawable);
 379    drawable->lastStamp = drawable->dri2.stamp;
 380 }
 381
 382 void
 383 intel_prepare_render(struct intel_context *intel)
 384 {
 385    __DRIcontext *driContext = intel->driContext;
 386    __DRIdrawable *drawable;
 387
 388    drawable = intel->driDrawable;
 389    if (drawable->dri2.stamp != driContext->dri2.draw_stamp) {
 390       if (drawable->lastStamp != drawable->dri2.stamp)
 391          intel_update_renderbuffers(driContext, drawable);
 392       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 393       driContext->dri2.draw_stamp = drawable->dri2.stamp;
 394    }
 395
 396    drawable = intel->driReadDrawable;
 397    if (drawable->dri2.stamp != driContext->dri2.read_stamp) {
 398       if (drawable->lastStamp != drawable->dri2.stamp)
 399          intel_update_renderbuffers(driContext, drawable);
 400       driContext->dri2.read_stamp = drawable->dri2.stamp;
 401    }
 402 }
 403
 404 void
 405 intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 406 {
 407     struct intel_context *intel = intel_context(ctx);
 408     __DRIcontext *driContext = intel->driContext;
 409
 410     if (!intel->using_dri2_swapbuffers &&
 411         !intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
 412        dri2InvalidateDrawable(driContext->driDrawablePriv);
 413        dri2InvalidateDrawable(driContext->driReadablePriv);
 414     }
 415 }
 416
 417 static const struct dri_debug_control debug_control[] = {
 418    { "tex",   DEBUG_TEXTURE},
 419    { "state", DEBUG_STATE},
 420    { "ioctl", DEBUG_IOCTL},
 421    { "blit",  DEBUG_BLIT},
 422    { "mip",   DEBUG_MIPTREE},
 423    { "fall",  DEBUG_FALLBACKS},
 424    { "verb",  DEBUG_VERBOSE},
 425    { "bat",   DEBUG_BATCH},
 426    { "pix",   DEBUG_PIXEL},
 427    { "buf",   DEBUG_BUFMGR},
 428    { "reg",   DEBUG_REGION},
 429    { "fbo",   DEBUG_FBO},
 430    { "lock",  DEBUG_LOCK},
 431    { "sync",  DEBUG_SYNC},
 432    { "prim",  DEBUG_PRIMS },
 433    { "vert",  DEBUG_VERTS },
 434    { "dri",   DEBUG_DRI },
 435    { "dma",   DEBUG_DMA },
 436    { "san",   DEBUG_SANITY },
 437    { "sleep", DEBUG_SLEEP },
 438    { "stats", DEBUG_STATS },
 439    { "tile",  DEBUG_TILE },
 440    { "sing",  DEBUG_SINGLE_THREAD },
 441    { "thre",  DEBUG_SINGLE_THREAD },
 442    { "wm",    DEBUG_WM },
 443    { "urb",   DEBUG_URB },
 444    { "vs",    DEBUG_VS },
 445    { NULL,    0 }
 446 };
 447
 448
 449 static void
 450 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 451 {
 452     struct intel_context *intel = intel_context(ctx);
 453
 454    _swrast_InvalidateState(ctx, new_state);
 455    _swsetup_InvalidateState(ctx, new_state);
 456    _vbo_InvalidateState(ctx, new_state);
 457    _tnl_InvalidateState(ctx, new_state);
 458    _tnl_invalidate_vertex_state(ctx, new_state);
 459
 460    intel->NewGLState |= new_state;
 461
 462    if (intel->vtbl.invalidate_state)
 463       intel->vtbl.invalidate_state( intel, new_state );
 464 }
 465
 466 void
 467 intel_flush(GLcontext *ctx, GLboolean needs_mi_flush)
 468 {
 469    struct intel_context *intel = intel_context(ctx);
 470
 471    if (intel->Fallback)
 472       _swrast_flush(ctx);
 473
 474    if (intel->gen < 4)
 475       INTEL_FIREVERTICES(intel);
 476
 477    if (intel->batch->map != intel->batch->ptr)
 478       intel_batchbuffer_flush(intel->batch);
 479
 480    if ((ctx->DrawBuffer->Name == 0) && intel->front_buffer_dirty) {
 481       __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 482
 483       if (screen->dri2.loader &&
 484           (screen->dri2.loader->base.version >= 2)
 485           && (screen->dri2.loader->flushFrontBuffer != NULL) &&
 486           intel->driDrawable && intel->driDrawable->loaderPrivate) {
 487          (*screen->dri2.loader->flushFrontBuffer)(intel->driDrawable,
 488                                                   intel->driDrawable->loaderPrivate);
 489
 490          /* Only clear the dirty bit if front-buffer rendering is no longer
 491           * enabled.  This is done so that the dirty bit can only be set in
 492           * glDrawBuffer.  Otherwise the dirty bit would have to be set at
 493           * each of N places that do rendering.  This has worse performances,
 494           * but it is much easier to get correct.
 495           */
 496          if (!intel->is_front_buffer_rendering) {
 497             intel->front_buffer_dirty = GL_FALSE;
 498          }
 499       }
 500    }
 501 }
 502
 503 void
 504 intelFlush(GLcontext * ctx)
 505 {
 506    intel_flush(ctx, GL_FALSE);
 507 }
 508
 509 static void
 510 intel_glFlush(GLcontext *ctx)
 511 {
 512    struct intel_context *intel = intel_context(ctx);
 513
 514    intel_flush(ctx, GL_TRUE);
 515
 516    /* We're using glFlush as an indicator that a frame is done, which is
 517     * what DRI2 does before calling SwapBuffers (and means we should catch
 518     * people doing front-buffer rendering, as well)..
 519     *
 520     * Wait for the swapbuffers before the one we just emitted, so we don't
 521     * get too many swaps outstanding for apps that are GPU-heavy but not
 522     * CPU-heavy.
 523     *
 524     * Unfortunately, we don't have a handle to the batch containing the swap,
 525     * and getting our hands on that doesn't seem worth it, so we just us the
 526     * first batch we emitted after the last swap.
 527     */
 528    if (!intel->using_dri2_swapbuffers &&
 529        intel->first_post_swapbuffers_batch != NULL) {
 530       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
 531       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 532       intel->first_post_swapbuffers_batch = NULL;
 533    }
 534 }
 535
 536 void
 537 intelFinish(GLcontext * ctx)
 538 {
 539    struct gl_framebuffer *fb = ctx->DrawBuffer;
 540    int i;
 541
 542    intelFlush(ctx);
 543
 544    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 545        struct intel_renderbuffer *irb;
 546
 547        irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 548
 549        if (irb && irb->region)
 550           dri_bo_wait_rendering(irb->region->buffer);
 551    }
 552    if (fb->_DepthBuffer) {
 553       /* XXX: Wait on buffer idle */
 554    }
 555 }
 556
 557 void
 558 intelInitDriverFunctions(struct dd_function_table *functions)
 559 {
 560    _mesa_init_driver_functions(functions);
 561
 562    functions->Flush = intel_glFlush;
 563    functions->Finish = intelFinish;
 564    functions->GetString = intelGetString;
 565    functions->UpdateState = intelInvalidateState;
 566
 567    intelInitTextureFuncs(functions);
 568    intelInitTextureImageFuncs(functions);
 569    intelInitTextureSubImageFuncs(functions);
 570    intelInitTextureCopyImageFuncs(functions);
 571    intelInitStateFuncs(functions);
 572    intelInitClearFuncs(functions);
 573    intelInitBufferFuncs(functions);
 574    intelInitPixelFuncs(functions);
 575    intelInitBufferObjectFuncs(functions);
 576    intel_init_syncobj_functions(functions);
 577 }
 578
 579
 580 GLboolean
 581 intelInitContext(struct intel_context *intel,
 582                  const __GLcontextModes * mesaVis,
 583                  __DRIcontext * driContextPriv,
 584                  void *sharedContextPrivate,
 585                  struct dd_function_table *functions)
 586 {
 587    GLcontext *ctx = &intel->ctx;
 588    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 589    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 590    struct intel_screen *intelScreen = sPriv->private;
 591    int bo_reuse_mode;
 592
 593    if (!_mesa_initialize_context(&intel->ctx, mesaVis, shareCtx,
 594                                  functions, (void *) intel)) {
 595       printf("%s: failed to init mesa context\n", __FUNCTION__);
 596       return GL_FALSE;
 597    }
 598
 599    driContextPriv->driverPrivate = intel;
 600    intel->intelScreen = intelScreen;
 601    intel->driScreen = sPriv;
 602    intel->driContext = driContextPriv;
 603    intel->driFd = sPriv->fd;
 604
 605    if (IS_965(intel->intelScreen->deviceID)) {
 606       intel->gen = 4;
 607    } else if (IS_9XX(intel->intelScreen->deviceID)) {
 608       intel->gen = 3;
 609       if (IS_945(intel->intelScreen->deviceID)) {
 610          intel->is_945 = GL_TRUE;
 611       }
 612    } else {
 613       intel->gen = 2;
 614    }
 615
 616    if (IS_IGDNG(intel->intelScreen->deviceID)) {
 617       intel->is_ironlake = GL_TRUE;
 618       intel->needs_ff_sync = GL_TRUE;
 619       intel->has_luminance_srgb = GL_TRUE;
 620    } else if (IS_G4X(intel->intelScreen->deviceID)) {
 621       intel->has_luminance_srgb = GL_TRUE;
 622       intel->is_g4x = GL_TRUE;
 623    }
 624
 625    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 626                        intel->driScreen->myNum,
 627                        (intel->gen >= 4) ? "i965" : "i915");
 628    if (intelScreen->deviceID == PCI_CHIP_I865_G)
 629       intel->maxBatchSize = 4096;
 630    else
 631       intel->maxBatchSize = BATCH_SZ;
 632
 633    intel->bufmgr = intelScreen->bufmgr;
 634
 635    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
 636    switch (bo_reuse_mode) {
 637    case DRI_CONF_BO_REUSE_DISABLED:
 638       break;
 639    case DRI_CONF_BO_REUSE_ALL:
 640       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
 641       break;
 642    }
 643
 644    /* This doesn't yet catch all non-conformant rendering, but it's a
 645     * start.
 646     */
 647    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 648       unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
 649       if (value > 0) {
 650          intel->conformance_mode = value;
 651       }
 652       else {
 653          intel->conformance_mode = 1;
 654       }
 655    }
 656
 657    if (intel->conformance_mode > 0) {
 658       ctx->Const.MinLineWidth = 1.0;
 659       ctx->Const.MinLineWidthAA = 1.0;
 660       ctx->Const.MaxLineWidth = 1.0;
 661       ctx->Const.MaxLineWidthAA = 1.0;
 662       ctx->Const.LineWidthGranularity = 1.0;
 663    }
 664    else {
 665       ctx->Const.MinLineWidth = 1.0;
 666       ctx->Const.MinLineWidthAA = 1.0;
 667       ctx->Const.MaxLineWidth = 5.0;
 668       ctx->Const.MaxLineWidthAA = 5.0;
 669       ctx->Const.LineWidthGranularity = 0.5;
 670    }
 671
 672    ctx->Const.MinPointSize = 1.0;
 673    ctx->Const.MinPointSizeAA = 1.0;
 674    ctx->Const.MaxPointSize = 255.0;
 675    ctx->Const.MaxPointSizeAA = 3.0;
 676    ctx->Const.PointSizeGranularity = 1.0;
 677
 678    /* reinitialize the context point state.
 679     * It depend on constants in __GLcontextRec::Const
 680     */
 681    _mesa_init_point(ctx);
 682
 683    meta_init_metaops(ctx, &intel->meta);
 684    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 685    if (intel->gen >= 4) {
 686       if (MAX_WIDTH > 8192)
 687          ctx->Const.MaxRenderbufferSize = 8192;
 688    } else {
 689       if (MAX_WIDTH > 2048)
 690          ctx->Const.MaxRenderbufferSize = 2048;
 691    }
 692
 693    /* Initialize the software rasterizer and helper modules. */
 694    _swrast_CreateContext(ctx);
 695    _vbo_CreateContext(ctx);
 696    _tnl_CreateContext(ctx);
 697    _swsetup_CreateContext(ctx);
 698
 699    /* Configure swrast to match hardware characteristics: */
 700    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 701    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 702
 703    _mesa_meta_init(ctx);
 704
 705    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 706    intel->hw_stipple = 1;
 707
 708    /* XXX FBO: this doesn't seem to be used anywhere */
 709    switch (mesaVis->depthBits) {
 710    case 0:                     /* what to do in this case? */
 711    case 16:
 712       intel->polygon_offset_scale = 1.0;
 713       break;
 714    case 24:
 715       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
 716       break;
 717    default:
 718       assert(0);
 719       break;
 720    }
 721
 722    if (intel->gen >= 4)
 723       intel->polygon_offset_scale /= 0xffff;
 724
 725    intel->RenderIndex = ~0;
 726
 727    intelInitExtensions(ctx);
 728
 729    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 730    if (INTEL_DEBUG & DEBUG_BUFMGR)
 731       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 732
 733    intel->batch = intel_batchbuffer_alloc(intel);
 734
 735    intel_fbo_init(intel);
 736
 737    if (intel->ctx.Mesa_DXTn) {
 738       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 739       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 740    }
 741    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 742       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 743    }
 744    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
 745                                                "texture_tiling");
 746    if (intel->use_texture_tiling &&
 747        !intel->intelScreen->kernel_exec_fencing) {
 748       fprintf(stderr, "No kernel support for execution fencing, "
 749               "disabling texture tiling\n");
 750       intel->use_texture_tiling = GL_FALSE;
 751    }
 752    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
 753
 754    intel->prim.primitive = ~0;
 755
 756    /* Force all software fallbacks */
 757    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 758       fprintf(stderr, "disabling 3D rasterization\n");
 759       intel->no_rast = 1;
 760    }
 761
 762    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
 763       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 764       intel->always_flush_batch = 1;
 765    }
 766
 767    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
 768       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 769       intel->always_flush_cache = 1;
 770    }
 771
 772    /* Disable all hardware rendering (skip emitting batches and fences/waits
 773     * to the kernel)
 774     */
 775    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 776
 777    return GL_TRUE;
 778 }
 779
 780 void
 781 intelDestroyContext(__DRIcontext * driContextPriv)
 782 {
 783    struct intel_context *intel =
 784       (struct intel_context *) driContextPriv->driverPrivate;
 785
 786    assert(intel);               /* should never be null */
 787    if (intel) {
 788       GLboolean release_texture_heaps;
 789
 790       INTEL_FIREVERTICES(intel);
 791
 792       _mesa_meta_free(&intel->ctx);
 793
 794       meta_destroy_metaops(&intel->meta);
 795
 796       intel->vtbl.destroy(intel);
 797
 798       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 799       _swsetup_DestroyContext(&intel->ctx);
 800       _tnl_DestroyContext(&intel->ctx);
 801       _vbo_DestroyContext(&intel->ctx);
 802
 803       _swrast_DestroyContext(&intel->ctx);
 804       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
 805
 806       intel_batchbuffer_free(intel->batch);
 807       intel->batch = NULL;
 808
 809       free(intel->prim.vb);
 810       intel->prim.vb = NULL;
 811       dri_bo_unreference(intel->prim.vb_bo);
 812       intel->prim.vb_bo = NULL;
 813       dri_bo_unreference(intel->first_post_swapbuffers_batch);
 814       intel->first_post_swapbuffers_batch = NULL;
 815
 816       if (release_texture_heaps) {
 817          /* Nothing is currently done here to free texture heaps;
 818           * but we're not using the texture heap utilities, so I
 819           * rather think we shouldn't.  I've taken a look, and can't
 820           * find any private texture data hanging around anywhere, but
 821           * I'm not yet certain there isn't any at all...
 822           */
 823          /* if (INTEL_DEBUG & DEBUG_TEXTURE)
 824             fprintf(stderr, "do something to free texture heaps\n");
 825           */
 826       }
 827
 828       driDestroyOptionCache(&intel->optionCache);
 829
 830       /* free the Mesa context */
 831       _mesa_free_context_data(&intel->ctx);
 832
 833       FREE(intel);
 834       driContextPriv->driverPrivate = NULL;
 835    }
 836 }
 837
 838 GLboolean
 839 intelUnbindContext(__DRIcontext * driContextPriv)
 840 {
 841    struct intel_context *intel =
 842       (struct intel_context *) driContextPriv->driverPrivate;
 843
 844    /* Deassociate the context with the drawables.
 845     */
 846    intel->driDrawable = NULL;
 847    intel->driReadDrawable = NULL;
 848
 849    return GL_TRUE;
 850 }
 851
 852 GLboolean
 853 intelMakeCurrent(__DRIcontext * driContextPriv,
 854                  __DRIdrawable * driDrawPriv,
 855                  __DRIdrawable * driReadPriv)
 856 {
 857    struct intel_context *intel;
 858    GET_CURRENT_CONTEXT(curCtx);
 859
 860    if (driContextPriv)
 861       intel = (struct intel_context *) driContextPriv->driverPrivate;
 862    else
 863       intel = NULL;
 864
 865    /* According to the glXMakeCurrent() man page: "Pending commands to
 866     * the previous context, if any, are flushed before it is released."
 867     * But only flush if we're actually changing contexts.
 868     */
 869    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
 870       _mesa_flush(curCtx);
 871    }
 872
 873    if (driContextPriv) {
 874       struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 875       struct gl_framebuffer *readFb = driReadPriv->driverPrivate;
 876
 877       _mesa_make_current(&intel->ctx, fb, readFb);
 878       intel->driReadDrawable = driReadPriv;
 879       intel->driDrawable = driDrawPriv;
 880       driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 881       driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 882    }
 883    else {
 884       _mesa_make_current(NULL, NULL, NULL);
 885    }
 886
 887    return GL_TRUE;
 888 }