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) Ironlake Desktop";
 163          break;
 164       case PCI_CHIP_ILM_G:
 165          chipset = "Intel(R) Ironlake Mobile";
 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 void
 181 intel_flush_front(GLcontext *ctx)
 182 {
 183    struct intel_context *intel = intel_context(ctx);
 184     __DRIcontext *driContext = intel->driContext;
 185     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
 186
 187    if ((ctx->DrawBuffer->Name == 0) && intel->front_buffer_dirty) {
 188       if (screen->dri2.loader &&
 189           (screen->dri2.loader->base.version >= 2)
 190           && (screen->dri2.loader->flushFrontBuffer != NULL) &&
 191           driContext->driDrawablePriv &&
 192           driContext->driDrawablePriv->loaderPrivate) {
 193          (*screen->dri2.loader->flushFrontBuffer)(driContext->driDrawablePriv,
 194                                                   driContext->driDrawablePriv->loaderPrivate);
 195
 196          /* We set the dirty bit in intel_prepare_render() if we're
 197           * front buffer rendering once we get there.
 198           */
 199          intel->front_buffer_dirty = GL_FALSE;
 200       }
 201    }
 202 }
 203
 204 static unsigned
 205 intel_bits_per_pixel(const struct intel_renderbuffer *rb)
 206 {
 207    return _mesa_get_format_bytes(rb->Base.Format) * 8;
 208 }
 209
 210 void
 211 intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
 212 {
 213    struct gl_framebuffer *fb = drawable->driverPrivate;
 214    struct intel_renderbuffer *rb;
 215    struct intel_region *region, *depth_region;
 216    struct intel_context *intel = context->driverPrivate;
 217    struct intel_renderbuffer *front_rb, *back_rb, *depth_rb, *stencil_rb;
 218    __DRIbuffer *buffers = NULL;
 219    __DRIscreen *screen;
 220    int i, count;
 221    unsigned int attachments[10];
 222    const char *region_name;
 223
 224    /* If we're rendering to the fake front buffer, make sure all the
 225     * pending drawing has landed on the real front buffer.  Otherwise
 226     * when we eventually get to DRI2GetBuffersWithFormat the stale
 227     * real front buffer contents will get copied to the new fake front
 228     * buffer.
 229     */
 230    if (intel->is_front_buffer_rendering) {
 231       intel_flush(&intel->ctx);
 232       intel_flush_front(&intel->ctx);
 233    }
 234
 235    /* Set this up front, so that in case our buffers get invalidated
 236     * while we're getting new buffers, we don't clobber the stamp and
 237     * thus ignore the invalidate. */
 238    drawable->lastStamp = drawable->dri2.stamp;
 239
 240    if (INTEL_DEBUG & DEBUG_DRI)
 241       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
 242
 243    screen = intel->intelScreen->driScrnPriv;
 244
 245    if (screen->dri2.loader
 246        && (screen->dri2.loader->base.version > 2)
 247        && (screen->dri2.loader->getBuffersWithFormat != NULL)) {
 248
 249       front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 250       back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 251       depth_rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 252       stencil_rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 253
 254       i = 0;
 255       if ((intel->is_front_buffer_rendering ||
 256            intel->is_front_buffer_reading ||
 257            !back_rb) && front_rb) {
 258          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 259          attachments[i++] = intel_bits_per_pixel(front_rb);
 260       }
 261
 262       if (back_rb) {
 263          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 264          attachments[i++] = intel_bits_per_pixel(back_rb);
 265       }
 266
 267       if ((depth_rb != NULL) && (stencil_rb != NULL)) {
 268          attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
 269          attachments[i++] = intel_bits_per_pixel(depth_rb);
 270       } else if (depth_rb != NULL) {
 271          attachments[i++] = __DRI_BUFFER_DEPTH;
 272          attachments[i++] = intel_bits_per_pixel(depth_rb);
 273       } else if (stencil_rb != NULL) {
 274          attachments[i++] = __DRI_BUFFER_STENCIL;
 275          attachments[i++] = intel_bits_per_pixel(stencil_rb);
 276       }
 277
 278       buffers =
 279          (*screen->dri2.loader->getBuffersWithFormat)(drawable,
 280                                                       &drawable->w,
 281                                                       &drawable->h,
 282                                                       attachments, i / 2,
 283                                                       &count,
 284                                                       drawable->loaderPrivate);
 285    } else if (screen->dri2.loader) {
 286       i = 0;
 287       if (intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT))
 288          attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
 289       if (intel_get_renderbuffer(fb, BUFFER_BACK_LEFT))
 290          attachments[i++] = __DRI_BUFFER_BACK_LEFT;
 291       if (intel_get_renderbuffer(fb, BUFFER_DEPTH))
 292          attachments[i++] = __DRI_BUFFER_DEPTH;
 293       if (intel_get_renderbuffer(fb, BUFFER_STENCIL))
 294          attachments[i++] = __DRI_BUFFER_STENCIL;
 295
 296       buffers = (*screen->dri2.loader->getBuffers)(drawable,
 297                                                    &drawable->w,
 298                                                    &drawable->h,
 299                                                    attachments, i,
 300                                                    &count,
 301                                                    drawable->loaderPrivate);
 302    }
 303
 304    if (buffers == NULL)
 305       return;
 306
 307    drawable->x = 0;
 308    drawable->y = 0;
 309    drawable->backX = 0;
 310    drawable->backY = 0;
 311    drawable->numClipRects = 1;
 312    drawable->pClipRects[0].x1 = 0;
 313    drawable->pClipRects[0].y1 = 0;
 314    drawable->pClipRects[0].x2 = drawable->w;
 315    drawable->pClipRects[0].y2 = drawable->h;
 316    drawable->numBackClipRects = 1;
 317    drawable->pBackClipRects[0].x1 = 0;
 318    drawable->pBackClipRects[0].y1 = 0;
 319    drawable->pBackClipRects[0].x2 = drawable->w;
 320    drawable->pBackClipRects[0].y2 = drawable->h;
 321
 322    depth_region = NULL;
 323    for (i = 0; i < count; i++) {
 324        switch (buffers[i].attachment) {
 325        case __DRI_BUFFER_FRONT_LEFT:
 326            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 327            region_name = "dri2 front buffer";
 328            break;
 329
 330        case __DRI_BUFFER_FAKE_FRONT_LEFT:
 331            rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
 332            region_name = "dri2 fake front buffer";
 333            break;
 334
 335        case __DRI_BUFFER_BACK_LEFT:
 336            rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
 337            region_name = "dri2 back buffer";
 338            break;
 339
 340        case __DRI_BUFFER_DEPTH:
 341            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 342            region_name = "dri2 depth buffer";
 343            break;
 344
 345        case __DRI_BUFFER_DEPTH_STENCIL:
 346            rb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
 347            region_name = "dri2 depth / stencil buffer";
 348            break;
 349
 350        case __DRI_BUFFER_STENCIL:
 351            rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 352            region_name = "dri2 stencil buffer";
 353            break;
 354
 355        case __DRI_BUFFER_ACCUM:
 356        default:
 357            fprintf(stderr,
 358                    "unhandled buffer attach event, attacment type %d\n",
 359                    buffers[i].attachment);
 360            return;
 361        }
 362
 363        if (rb == NULL)
 364           continue;
 365
 366        if (rb->region && rb->region->name == buffers[i].name)
 367              continue;
 368
 369        if (INTEL_DEBUG & DEBUG_DRI)
 370           fprintf(stderr,
 371                   "attaching buffer %d, at %d, cpp %d, pitch %d\n",
 372                   buffers[i].name, buffers[i].attachment,
 373                   buffers[i].cpp, buffers[i].pitch);
 374
 375        if (buffers[i].attachment == __DRI_BUFFER_STENCIL && depth_region) {
 376           if (INTEL_DEBUG & DEBUG_DRI)
 377              fprintf(stderr, "(reusing depth buffer as stencil)\n");
 378           intel_region_reference(&region, depth_region);
 379        }
 380        else
 381           region = intel_region_alloc_for_handle(intel, buffers[i].cpp,
 382                                                  drawable->w,
 383                                                  drawable->h,
 384                                                  buffers[i].pitch / buffers[i].cpp,
 385                                                  buffers[i].name,
 386                                                  region_name);
 387
 388        if (buffers[i].attachment == __DRI_BUFFER_DEPTH)
 389           depth_region = region;
 390
 391        intel_renderbuffer_set_region(intel, rb, region);
 392        intel_region_release(&region);
 393
 394        if (buffers[i].attachment == __DRI_BUFFER_DEPTH_STENCIL) {
 395           rb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 396           if (rb != NULL) {
 397              struct intel_region *stencil_region = NULL;
 398
 399              if (rb->region && rb->region->name == buffers[i].name)
 400                    continue;
 401
 402              intel_region_reference(&stencil_region, region);
 403              intel_renderbuffer_set_region(intel, rb, stencil_region);
 404              intel_region_release(&stencil_region);
 405           }
 406        }
 407    }
 408
 409    driUpdateFramebufferSize(&intel->ctx, drawable);
 410 }
 411
 412 void
 413 intel_prepare_render(struct intel_context *intel)
 414 {
 415    __DRIcontext *driContext = intel->driContext;
 416    __DRIdrawable *drawable;
 417
 418    drawable = driContext->driDrawablePriv;
 419    if (drawable->dri2.stamp != driContext->dri2.draw_stamp) {
 420       if (drawable->lastStamp != drawable->dri2.stamp)
 421          intel_update_renderbuffers(driContext, drawable);
 422       intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
 423       driContext->dri2.draw_stamp = drawable->dri2.stamp;
 424    }
 425
 426    drawable = driContext->driReadablePriv;
 427    if (drawable->dri2.stamp != driContext->dri2.read_stamp) {
 428       if (drawable->lastStamp != drawable->dri2.stamp)
 429          intel_update_renderbuffers(driContext, drawable);
 430       driContext->dri2.read_stamp = drawable->dri2.stamp;
 431    }
 432
 433    /* If we're currently rendering to the front buffer, the rendering
 434     * that will happen next will probably dirty the front buffer.  So
 435     * mark it as dirty here.
 436     */
 437    if (intel->is_front_buffer_rendering)
 438       intel->front_buffer_dirty = GL_TRUE;
 439 }
 440
 441 static void
 442 intel_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 443 {
 444     struct intel_context *intel = intel_context(ctx);
 445     __DRIcontext *driContext = intel->driContext;
 446
 447     if (intel->saved_viewport)
 448         intel->saved_viewport(ctx, x, y, w, h);
 449
 450     if (!intel->using_dri2_swapbuffers &&
 451         !intel->meta.internal_viewport_call && ctx->DrawBuffer->Name == 0) {
 452        dri2InvalidateDrawable(driContext->driDrawablePriv);
 453        dri2InvalidateDrawable(driContext->driReadablePriv);
 454     }
 455 }
 456
 457 static const struct dri_debug_control debug_control[] = {
 458    { "tex",   DEBUG_TEXTURE},
 459    { "state", DEBUG_STATE},
 460    { "ioctl", DEBUG_IOCTL},
 461    { "blit",  DEBUG_BLIT},
 462    { "mip",   DEBUG_MIPTREE},
 463    { "fall",  DEBUG_FALLBACKS},
 464    { "verb",  DEBUG_VERBOSE},
 465    { "bat",   DEBUG_BATCH},
 466    { "pix",   DEBUG_PIXEL},
 467    { "buf",   DEBUG_BUFMGR},
 468    { "reg",   DEBUG_REGION},
 469    { "fbo",   DEBUG_FBO},
 470    { "lock",  DEBUG_LOCK},
 471    { "sync",  DEBUG_SYNC},
 472    { "prim",  DEBUG_PRIMS },
 473    { "vert",  DEBUG_VERTS },
 474    { "dri",   DEBUG_DRI },
 475    { "dma",   DEBUG_DMA },
 476    { "san",   DEBUG_SANITY },
 477    { "sleep", DEBUG_SLEEP },
 478    { "stats", DEBUG_STATS },
 479    { "tile",  DEBUG_TILE },
 480    { "sing",  DEBUG_SINGLE_THREAD },
 481    { "thre",  DEBUG_SINGLE_THREAD },
 482    { "wm",    DEBUG_WM },
 483    { "glsl_force", DEBUG_GLSL_FORCE },
 484    { "urb",   DEBUG_URB },
 485    { "vs",    DEBUG_VS },
 486    { NULL,    0 }
 487 };
 488
 489
 490 static void
 491 intelInvalidateState(GLcontext * ctx, GLuint new_state)
 492 {
 493     struct intel_context *intel = intel_context(ctx);
 494
 495    _swrast_InvalidateState(ctx, new_state);
 496    _swsetup_InvalidateState(ctx, new_state);
 497    _vbo_InvalidateState(ctx, new_state);
 498    _tnl_InvalidateState(ctx, new_state);
 499    _tnl_invalidate_vertex_state(ctx, new_state);
 500
 501    intel->NewGLState |= new_state;
 502
 503    if (intel->vtbl.invalidate_state)
 504       intel->vtbl.invalidate_state( intel, new_state );
 505 }
 506
 507 void
 508 intel_flush(GLcontext *ctx)
 509 {
 510    struct intel_context *intel = intel_context(ctx);
 511
 512    if (intel->Fallback)
 513       _swrast_flush(ctx);
 514
 515    if (intel->gen < 4)
 516       INTEL_FIREVERTICES(intel);
 517
 518    if (intel->batch->map != intel->batch->ptr)
 519       intel_batchbuffer_flush(intel->batch);
 520 }
 521
 522 static void
 523 intel_glFlush(GLcontext *ctx)
 524 {
 525    struct intel_context *intel = intel_context(ctx);
 526
 527    intel_flush(ctx);
 528
 529    intel_flush_front(ctx);
 530
 531    /* We're using glFlush as an indicator that a frame is done, which is
 532     * what DRI2 does before calling SwapBuffers (and means we should catch
 533     * people doing front-buffer rendering, as well)..
 534     *
 535     * Wait for the swapbuffers before the one we just emitted, so we don't
 536     * get too many swaps outstanding for apps that are GPU-heavy but not
 537     * CPU-heavy.
 538     *
 539     * Unfortunately, we don't have a handle to the batch containing the swap,
 540     * and getting our hands on that doesn't seem worth it, so we just us the
 541     * first batch we emitted after the last swap.
 542     */
 543    if (!intel->using_dri2_swapbuffers &&
 544        intel->first_post_swapbuffers_batch != NULL) {
 545       drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
 546       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
 547       intel->first_post_swapbuffers_batch = NULL;
 548    }
 549 }
 550
 551 void
 552 intelFinish(GLcontext * ctx)
 553 {
 554    struct gl_framebuffer *fb = ctx->DrawBuffer;
 555    int i;
 556
 557    intel_flush(ctx);
 558    intel_flush_front(ctx);
 559
 560    for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
 561        struct intel_renderbuffer *irb;
 562
 563        irb = intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 564
 565        if (irb && irb->region)
 566           dri_bo_wait_rendering(irb->region->buffer);
 567    }
 568    if (fb->_DepthBuffer) {
 569       /* XXX: Wait on buffer idle */
 570    }
 571 }
 572
 573 void
 574 intelInitDriverFunctions(struct dd_function_table *functions)
 575 {
 576    _mesa_init_driver_functions(functions);
 577
 578    functions->Flush = intel_glFlush;
 579    functions->Finish = intelFinish;
 580    functions->GetString = intelGetString;
 581    functions->UpdateState = intelInvalidateState;
 582
 583    intelInitTextureFuncs(functions);
 584    intelInitTextureImageFuncs(functions);
 585    intelInitTextureSubImageFuncs(functions);
 586    intelInitTextureCopyImageFuncs(functions);
 587    intelInitStateFuncs(functions);
 588    intelInitClearFuncs(functions);
 589    intelInitBufferFuncs(functions);
 590    intelInitPixelFuncs(functions);
 591    intelInitBufferObjectFuncs(functions);
 592    intel_init_syncobj_functions(functions);
 593 }
 594
 595
 596 GLboolean
 597 intelInitContext(struct intel_context *intel,
 598                  int api,
 599                  const __GLcontextModes * mesaVis,
 600                  __DRIcontext * driContextPriv,
 601                  void *sharedContextPrivate,
 602                  struct dd_function_table *functions)
 603 {
 604    GLcontext *ctx = &intel->ctx;
 605    GLcontext *shareCtx = (GLcontext *) sharedContextPrivate;
 606    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 607    struct intel_screen *intelScreen = sPriv->private;
 608    int bo_reuse_mode;
 609
 610    /* we can't do anything without a connection to the device */
 611    if (intelScreen->bufmgr == NULL)
 612       return GL_FALSE;
 613
 614    /* Can't rely on invalidate events, fall back to glViewport hack */
 615    if (!driContextPriv->driScreenPriv->dri2.useInvalidate) {
 616       intel->saved_viewport = functions->Viewport;
 617       functions->Viewport = intel_viewport;
 618    }
 619
 620    if (!_mesa_initialize_context_for_api(&intel->ctx, api, mesaVis, shareCtx,
 621                                          functions, (void *) intel)) {
 622       printf("%s: failed to init mesa context\n", __FUNCTION__);
 623       return GL_FALSE;
 624    }
 625
 626    driContextPriv->driverPrivate = intel;
 627    intel->intelScreen = intelScreen;
 628    intel->driContext = driContextPriv;
 629    intel->driFd = sPriv->fd;
 630
 631    if (IS_GEN6(intel->intelScreen->deviceID)) {
 632       intel->gen = 6;
 633       intel->needs_ff_sync = GL_TRUE;
 634       intel->has_luminance_srgb = GL_TRUE;
 635    } else if (IS_GEN5(intel->intelScreen->deviceID)) {
 636       intel->gen = 5;
 637       intel->needs_ff_sync = GL_TRUE;
 638       intel->has_luminance_srgb = GL_TRUE;
 639    } else if (IS_965(intel->intelScreen->deviceID)) {
 640       intel->gen = 4;
 641       if (IS_G4X(intel->intelScreen->deviceID)) {
 642           intel->has_luminance_srgb = GL_TRUE;
 643           intel->is_g4x = GL_TRUE;
 644       }
 645    } else if (IS_9XX(intel->intelScreen->deviceID)) {
 646       intel->gen = 3;
 647       if (IS_945(intel->intelScreen->deviceID)) {
 648          intel->is_945 = GL_TRUE;
 649       }
 650    } else {
 651       intel->gen = 2;
 652    }
 653
 654    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
 655                        sPriv->myNum, (intel->gen >= 4) ? "i965" : "i915");
 656    if (intelScreen->deviceID == PCI_CHIP_I865_G)
 657       intel->maxBatchSize = 4096;
 658    else
 659       intel->maxBatchSize = BATCH_SZ;
 660
 661    intel->bufmgr = intelScreen->bufmgr;
 662
 663    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
 664    switch (bo_reuse_mode) {
 665    case DRI_CONF_BO_REUSE_DISABLED:
 666       break;
 667    case DRI_CONF_BO_REUSE_ALL:
 668       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
 669       break;
 670    }
 671
 672    /* This doesn't yet catch all non-conformant rendering, but it's a
 673     * start.
 674     */
 675    if (getenv("INTEL_STRICT_CONFORMANCE")) {
 676       unsigned int value = atoi(getenv("INTEL_STRICT_CONFORMANCE"));
 677       if (value > 0) {
 678          intel->conformance_mode = value;
 679       }
 680       else {
 681          intel->conformance_mode = 1;
 682       }
 683    }
 684
 685    if (intel->conformance_mode > 0) {
 686       ctx->Const.MinLineWidth = 1.0;
 687       ctx->Const.MinLineWidthAA = 1.0;
 688       ctx->Const.MaxLineWidth = 1.0;
 689       ctx->Const.MaxLineWidthAA = 1.0;
 690       ctx->Const.LineWidthGranularity = 1.0;
 691    }
 692    else {
 693       ctx->Const.MinLineWidth = 1.0;
 694       ctx->Const.MinLineWidthAA = 1.0;
 695       ctx->Const.MaxLineWidth = 5.0;
 696       ctx->Const.MaxLineWidthAA = 5.0;
 697       ctx->Const.LineWidthGranularity = 0.5;
 698    }
 699
 700    ctx->Const.MinPointSize = 1.0;
 701    ctx->Const.MinPointSizeAA = 1.0;
 702    ctx->Const.MaxPointSize = 255.0;
 703    ctx->Const.MaxPointSizeAA = 3.0;
 704    ctx->Const.PointSizeGranularity = 1.0;
 705
 706    /* reinitialize the context point state.
 707     * It depend on constants in __GLcontextRec::Const
 708     */
 709    _mesa_init_point(ctx);
 710
 711    meta_init_metaops(ctx, &intel->meta);
 712    ctx->Const.MaxColorAttachments = 4;  /* XXX FBO: review this */
 713    if (intel->gen >= 4) {
 714       if (MAX_WIDTH > 8192)
 715          ctx->Const.MaxRenderbufferSize = 8192;
 716    } else {
 717       if (MAX_WIDTH > 2048)
 718          ctx->Const.MaxRenderbufferSize = 2048;
 719    }
 720
 721    /* Initialize the software rasterizer and helper modules. */
 722    _swrast_CreateContext(ctx);
 723    _vbo_CreateContext(ctx);
 724    _tnl_CreateContext(ctx);
 725    _swsetup_CreateContext(ctx);
 726
 727    /* Configure swrast to match hardware characteristics: */
 728    _swrast_allow_pixel_fog(ctx, GL_FALSE);
 729    _swrast_allow_vertex_fog(ctx, GL_TRUE);
 730
 731    _mesa_meta_init(ctx);
 732
 733    intel->hw_stencil = mesaVis->stencilBits && mesaVis->depthBits == 24;
 734    intel->hw_stipple = 1;
 735
 736    /* XXX FBO: this doesn't seem to be used anywhere */
 737    switch (mesaVis->depthBits) {
 738    case 0:                     /* what to do in this case? */
 739    case 16:
 740       intel->polygon_offset_scale = 1.0;
 741       break;
 742    case 24:
 743       intel->polygon_offset_scale = 2.0;     /* req'd to pass glean */
 744       break;
 745    default:
 746       assert(0);
 747       break;
 748    }
 749
 750    if (intel->gen >= 4)
 751       intel->polygon_offset_scale /= 0xffff;
 752
 753    intel->RenderIndex = ~0;
 754
 755    switch (ctx->API) {
 756    case API_OPENGL:
 757       intelInitExtensions(ctx);
 758       break;
 759    case API_OPENGLES:
 760       break;
 761    case API_OPENGLES2:
 762       intelInitExtensionsES2(ctx);
 763       break;
 764    }
 765
 766    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
 767    if (INTEL_DEBUG & DEBUG_BUFMGR)
 768       dri_bufmgr_set_debug(intel->bufmgr, GL_TRUE);
 769
 770    intel->batch = intel_batchbuffer_alloc(intel);
 771
 772    intel_fbo_init(intel);
 773
 774    if (intel->ctx.Mesa_DXTn) {
 775       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 776       _mesa_enable_extension(ctx, "GL_S3_s3tc");
 777    }
 778    else if (driQueryOptionb(&intel->optionCache, "force_s3tc_enable")) {
 779       _mesa_enable_extension(ctx, "GL_EXT_texture_compression_s3tc");
 780    }
 781    intel->use_texture_tiling = driQueryOptionb(&intel->optionCache,
 782                                                "texture_tiling");
 783    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
 784
 785    intel->prim.primitive = ~0;
 786
 787    /* Force all software fallbacks */
 788    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
 789       fprintf(stderr, "disabling 3D rasterization\n");
 790       intel->no_rast = 1;
 791    }
 792
 793    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
 794       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
 795       intel->always_flush_batch = 1;
 796    }
 797
 798    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
 799       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
 800       intel->always_flush_cache = 1;
 801    }
 802
 803    /* Disable all hardware rendering (skip emitting batches and fences/waits
 804     * to the kernel)
 805     */
 806    intel->no_hw = getenv("INTEL_NO_HW") != NULL;
 807
 808    return GL_TRUE;
 809 }
 810
 811 void
 812 intelDestroyContext(__DRIcontext * driContextPriv)
 813 {
 814    struct intel_context *intel =
 815       (struct intel_context *) driContextPriv->driverPrivate;
 816
 817    assert(intel);               /* should never be null */
 818    if (intel) {
 819       GLboolean release_texture_heaps;
 820
 821       INTEL_FIREVERTICES(intel);
 822
 823       _mesa_meta_free(&intel->ctx);
 824
 825       meta_destroy_metaops(&intel->meta);
 826
 827       intel->vtbl.destroy(intel);
 828
 829       release_texture_heaps = (intel->ctx.Shared->RefCount == 1);
 830       _swsetup_DestroyContext(&intel->ctx);
 831       _tnl_DestroyContext(&intel->ctx);
 832       _vbo_DestroyContext(&intel->ctx);
 833
 834       _swrast_DestroyContext(&intel->ctx);
 835       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
 836
 837       intel_batchbuffer_free(intel->batch);
 838       intel->batch = NULL;
 839
 840       free(intel->prim.vb);
 841       intel->prim.vb = NULL;
 842       dri_bo_unreference(intel->prim.vb_bo);
 843       intel->prim.vb_bo = NULL;
 844       dri_bo_unreference(intel->first_post_swapbuffers_batch);
 845       intel->first_post_swapbuffers_batch = NULL;
 846
 847       if (release_texture_heaps) {
 848          /* Nothing is currently done here to free texture heaps;
 849           * but we're not using the texture heap utilities, so I
 850           * rather think we shouldn't.  I've taken a look, and can't
 851           * find any private texture data hanging around anywhere, but
 852           * I'm not yet certain there isn't any at all...
 853           */
 854          /* if (INTEL_DEBUG & DEBUG_TEXTURE)
 855             fprintf(stderr, "do something to free texture heaps\n");
 856           */
 857       }
 858
 859       driDestroyOptionCache(&intel->optionCache);
 860
 861       /* free the Mesa context */
 862       _mesa_free_context_data(&intel->ctx);
 863
 864       FREE(intel);
 865       driContextPriv->driverPrivate = NULL;
 866    }
 867 }
 868
 869 GLboolean
 870 intelUnbindContext(__DRIcontext * driContextPriv)
 871 {
 872    return GL_TRUE;
 873 }
 874
 875 GLboolean
 876 intelMakeCurrent(__DRIcontext * driContextPriv,
 877                  __DRIdrawable * driDrawPriv,
 878                  __DRIdrawable * driReadPriv)
 879 {
 880    struct intel_context *intel;
 881    GET_CURRENT_CONTEXT(curCtx);
 882
 883    if (driContextPriv)
 884       intel = (struct intel_context *) driContextPriv->driverPrivate;
 885    else
 886       intel = NULL;
 887
 888    /* According to the glXMakeCurrent() man page: "Pending commands to
 889     * the previous context, if any, are flushed before it is released."
 890     * But only flush if we're actually changing contexts.
 891     */
 892    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
 893       _mesa_flush(curCtx);
 894    }
 895
 896    if (driContextPriv) {
 897       struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 898       struct gl_framebuffer *readFb = driReadPriv->driverPrivate;
 899
 900       driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
 901       driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
 902       intel_prepare_render(intel);
 903       _mesa_make_current(&intel->ctx, fb, readFb);
 904    }
 905    else {
 906       _mesa_make_current(NULL, NULL, NULL);
 907    }
 908
 909    return GL_TRUE;
 910 }