src/mesa/drivers/dri/intel/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <errno.h>
  29 #include <time.h>
  30 #include "main/glheader.h"
  31 #include "main/context.h"
  32 #include "main/framebuffer.h"
  33 #include "main/renderbuffer.h"
  34 #include "main/hash.h"
  35 #include "main/fbobject.h"
  36 #include "main/mfeatures.h"
  37 #include "main/version.h"
  38 #include "swrast/s_renderbuffer.h"
  39
  40 #include "utils.h"
  41 #include "xmlpool.h"
  42
  43 PUBLIC const char __driConfigOptions[] =
  44    DRI_CONF_BEGIN
  45    DRI_CONF_SECTION_PERFORMANCE
  46       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  47       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  48        * DRI_CONF_BO_REUSE_ALL
  49        */
  50       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  51          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  52             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  53             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  54          DRI_CONF_DESC_END
  55       DRI_CONF_OPT_END
  56
  57       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  58          DRI_CONF_DESC(en, "Enable texture tiling")
  59       DRI_CONF_OPT_END
  60
  61       DRI_CONF_OPT_BEGIN(hiz, bool, true)
  62          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  63       DRI_CONF_OPT_END
  64
  65       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  66          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  67       DRI_CONF_OPT_END
  68
  69       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  70          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  71       DRI_CONF_OPT_END
  72
  73    DRI_CONF_SECTION_END
  74    DRI_CONF_SECTION_QUALITY
  75       DRI_CONF_FORCE_S3TC_ENABLE(false)
  76       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  77    DRI_CONF_SECTION_END
  78    DRI_CONF_SECTION_DEBUG
  79      DRI_CONF_NO_RAST(false)
  80      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  81      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  82      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
  83      DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS(false)
  84      DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED(false)
  85
  86       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  87          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  88       DRI_CONF_OPT_END
  89
  90       DRI_CONF_OPT_BEGIN(shader_precompile, bool, true)
  91          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  92       DRI_CONF_OPT_END
  93    DRI_CONF_SECTION_END
  94 DRI_CONF_END;
  95
  96 const GLuint __driNConfigOptions = 16;
  97
  98 #include "intel_batchbuffer.h"
  99 #include "intel_buffers.h"
 100 #include "intel_bufmgr.h"
 101 #include "intel_chipset.h"
 102 #include "intel_fbo.h"
 103 #include "intel_mipmap_tree.h"
 104 #include "intel_screen.h"
 105 #include "intel_tex.h"
 106 #include "intel_regions.h"
 107
 108 #include "i915_drm.h"
 109
 110 #ifdef USE_NEW_INTERFACE
 111 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 112 #endif /*USE_NEW_INTERFACE */
 113
 114 /**
 115  * For debugging purposes, this returns a time in seconds.
 116  */
 117 double
 118 get_time(void)
 119 {
 120    struct timespec tp;
 121
 122    clock_gettime(CLOCK_MONOTONIC, &tp);
 123
 124    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 125 }
 126
 127 void
 128 aub_dump_bmp(struct gl_context *ctx)
 129 {
 130    struct gl_framebuffer *fb = ctx->DrawBuffer;
 131
 132    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 133       struct intel_renderbuffer *irb =
 134          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 135
 136       if (irb && irb->mt) {
 137          enum aub_dump_bmp_format format;
 138
 139          switch (irb->Base.Base.Format) {
 140          case MESA_FORMAT_ARGB8888:
 141          case MESA_FORMAT_XRGB8888:
 142             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 143             break;
 144          default:
 145             continue;
 146          }
 147
 148          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 149                                        irb->draw_x,
 150                                        irb->draw_y,
 151                                        irb->Base.Base.Width,
 152                                        irb->Base.Base.Height,
 153                                        format,
 154                                        irb->mt->region->pitch *
 155                                        irb->mt->region->cpp,
 156                                        0);
 157       }
 158    }
 159 }
 160
 161 static const __DRItexBufferExtension intelTexBufferExtension = {
 162    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 163
 164    .setTexBuffer        = intelSetTexBuffer,
 165    .setTexBuffer2       = intelSetTexBuffer2,
 166    .releaseTexBuffer    = NULL,
 167 };
 168
 169 static void
 170 intelDRI2Flush(__DRIdrawable *drawable)
 171 {
 172    GET_CURRENT_CONTEXT(ctx);
 173    struct intel_context *intel = intel_context(ctx);
 174    if (intel == NULL)
 175       return;
 176
 177    if (intel->gen < 4)
 178       INTEL_FIREVERTICES(intel);
 179
 180    intel_downsample_for_dri2_flush(intel, drawable);
 181    intel->need_throttle = true;
 182
 183    if (intel->batch.used)
 184       intel_batchbuffer_flush(intel);
 185
 186    if (INTEL_DEBUG & DEBUG_AUB) {
 187       aub_dump_bmp(ctx);
 188    }
 189 }
 190
 191 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 192     .base = { __DRI2_FLUSH, 3 },
 193
 194     .flush              = intelDRI2Flush,
 195     .invalidate         = dri2InvalidateDrawable,
 196 };
 197
 198 static struct intel_image_format intel_image_formats[] = {
 199    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 200      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 201
 202    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 203      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 204
 205    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 206      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 207        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 208        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 209
 210    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 211      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 212        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 213        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 214
 215    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 216      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 217        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 218        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 219
 220    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 221      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 222        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 223        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 224
 225    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 226      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 227        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 228        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 229
 230    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 231      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 232        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 233
 234    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 235      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 236        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 237
 238    /* For YUYV buffers, we set up two overlapping DRI images and treat
 239     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 240     * samples YU or YV pairs and places Y into the R component, while
 241     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 242     * places U into the G component and V into A.  This lets the
 243     * texture sampler interpolate the Y components correctly when
 244     * sampling from plane 0, and interpolate U and V correctly when
 245     * sampling from plane 1. */
 246    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 247      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 248        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 249 };
 250
 251 static __DRIimage *
 252 intel_allocate_image(int dri_format, void *loaderPrivate)
 253 {
 254     __DRIimage *image;
 255
 256     image = calloc(1, sizeof *image);
 257     if (image == NULL)
 258         return NULL;
 259
 260     image->dri_format = dri_format;
 261     image->offset = 0;
 262
 263     switch (dri_format) {
 264     case __DRI_IMAGE_FORMAT_RGB565:
 265        image->format = MESA_FORMAT_RGB565;
 266        break;
 267     case __DRI_IMAGE_FORMAT_XRGB8888:
 268        image->format = MESA_FORMAT_XRGB8888;
 269        break;
 270     case __DRI_IMAGE_FORMAT_ARGB8888:
 271        image->format = MESA_FORMAT_ARGB8888;
 272        break;
 273     case __DRI_IMAGE_FORMAT_ABGR8888:
 274        image->format = MESA_FORMAT_RGBA8888_REV;
 275        break;
 276     case __DRI_IMAGE_FORMAT_XBGR8888:
 277        image->format = MESA_FORMAT_RGBX8888_REV;
 278        break;
 279     case __DRI_IMAGE_FORMAT_R8:
 280        image->format = MESA_FORMAT_R8;
 281        break;
 282     case __DRI_IMAGE_FORMAT_GR88:
 283        image->format = MESA_FORMAT_GR88;
 284        break;
 285     case __DRI_IMAGE_FORMAT_NONE:
 286        image->format = MESA_FORMAT_NONE;
 287        break;
 288     default:
 289        free(image);
 290        return NULL;
 291     }
 292
 293     image->internal_format = _mesa_get_format_base_format(image->format);
 294     image->data = loaderPrivate;
 295
 296     return image;
 297 }
 298
 299 static __DRIimage *
 300 intel_create_image_from_name(__DRIscreen *screen,
 301                              int width, int height, int format,
 302                              int name, int pitch, void *loaderPrivate)
 303 {
 304     struct intel_screen *intelScreen = screen->driverPrivate;
 305     __DRIimage *image;
 306     int cpp;
 307
 308     image = intel_allocate_image(format, loaderPrivate);
 309     if (image->format == MESA_FORMAT_NONE)
 310        cpp = 1;
 311     else
 312        cpp = _mesa_get_format_bytes(image->format);
 313     image->region = intel_region_alloc_for_handle(intelScreen,
 314                                                   cpp, width, height,
 315                                                   pitch, name, "image");
 316     if (image->region == NULL) {
 317        free(image);
 318        return NULL;
 319     }
 320
 321     return image;
 322 }
 323
 324 static __DRIimage *
 325 intel_create_image_from_renderbuffer(__DRIcontext *context,
 326                                      int renderbuffer, void *loaderPrivate)
 327 {
 328    __DRIimage *image;
 329    struct intel_context *intel = context->driverPrivate;
 330    struct gl_renderbuffer *rb;
 331    struct intel_renderbuffer *irb;
 332
 333    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 334    if (!rb) {
 335       _mesa_error(&intel->ctx,
 336                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 337       return NULL;
 338    }
 339
 340    irb = intel_renderbuffer(rb);
 341    image = calloc(1, sizeof *image);
 342    if (image == NULL)
 343       return NULL;
 344
 345    image->internal_format = rb->InternalFormat;
 346    image->format = rb->Format;
 347    image->offset = 0;
 348    image->data = loaderPrivate;
 349    intel_region_reference(&image->region, irb->mt->region);
 350
 351    switch (image->format) {
 352    case MESA_FORMAT_RGB565:
 353       image->dri_format = __DRI_IMAGE_FORMAT_RGB565;
 354       break;
 355    case MESA_FORMAT_XRGB8888:
 356       image->dri_format = __DRI_IMAGE_FORMAT_XRGB8888;
 357       break;
 358    case MESA_FORMAT_ARGB8888:
 359       image->dri_format = __DRI_IMAGE_FORMAT_ARGB8888;
 360       break;
 361    case MESA_FORMAT_RGBA8888_REV:
 362       image->dri_format = __DRI_IMAGE_FORMAT_ABGR8888;
 363       break;
 364    case MESA_FORMAT_R8:
 365       image->dri_format = __DRI_IMAGE_FORMAT_R8;
 366       break;
 367    case MESA_FORMAT_RG88:
 368       image->dri_format = __DRI_IMAGE_FORMAT_GR88;
 369       break;
 370    }
 371
 372    return image;
 373 }
 374
 375 static void
 376 intel_destroy_image(__DRIimage *image)
 377 {
 378     intel_region_release(&image->region);
 379     free(image);
 380 }
 381
 382 static __DRIimage *
 383 intel_create_image(__DRIscreen *screen,
 384                    int width, int height, int format,
 385                    unsigned int use,
 386                    void *loaderPrivate)
 387 {
 388    __DRIimage *image;
 389    struct intel_screen *intelScreen = screen->driverPrivate;
 390    uint32_t tiling;
 391    int cpp;
 392
 393    tiling = I915_TILING_X;
 394    if (use & __DRI_IMAGE_USE_CURSOR) {
 395       if (width != 64 || height != 64)
 396          return NULL;
 397       tiling = I915_TILING_NONE;
 398    }
 399
 400    image = intel_allocate_image(format, loaderPrivate);
 401    cpp = _mesa_get_format_bytes(image->format);
 402    image->region =
 403       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 404    if (image->region == NULL) {
 405       free(image);
 406       return NULL;
 407    }
 408
 409    return image;
 410 }
 411
 412 static GLboolean
 413 intel_query_image(__DRIimage *image, int attrib, int *value)
 414 {
 415    switch (attrib) {
 416    case __DRI_IMAGE_ATTRIB_STRIDE:
 417       *value = image->region->pitch * image->region->cpp;
 418       return true;
 419    case __DRI_IMAGE_ATTRIB_HANDLE:
 420       *value = image->region->bo->handle;
 421       return true;
 422    case __DRI_IMAGE_ATTRIB_NAME:
 423       return intel_region_flink(image->region, (uint32_t *) value);
 424    case __DRI_IMAGE_ATTRIB_FORMAT:
 425       *value = image->dri_format;
 426       return true;
 427    case __DRI_IMAGE_ATTRIB_WIDTH:
 428       *value = image->region->width;
 429       return true;
 430    case __DRI_IMAGE_ATTRIB_HEIGHT:
 431       *value = image->region->height;
 432       return true;
 433    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 434       if (image->planar_format == NULL)
 435          return false;
 436       *value = image->planar_format->components;
 437       return true;
 438   default:
 439       return false;
 440    }
 441 }
 442
 443 static __DRIimage *
 444 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 445 {
 446    __DRIimage *image;
 447
 448    image = calloc(1, sizeof *image);
 449    if (image == NULL)
 450       return NULL;
 451
 452    intel_region_reference(&image->region, orig_image->region);
 453    if (image->region == NULL) {
 454       free(image);
 455       return NULL;
 456    }
 457
 458    image->internal_format = orig_image->internal_format;
 459    image->planar_format   = orig_image->planar_format;
 460    image->dri_format      = orig_image->dri_format;
 461    image->format          = orig_image->format;
 462    image->offset          = orig_image->offset;
 463    image->data            = loaderPrivate;
 464
 465    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 466    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 467
 468    return image;
 469 }
 470
 471 static GLboolean
 472 intel_validate_usage(__DRIimage *image, unsigned int use)
 473 {
 474    if (use & __DRI_IMAGE_USE_CURSOR) {
 475       if (image->region->width != 64 || image->region->height != 64)
 476          return GL_FALSE;
 477    }
 478
 479    return GL_TRUE;
 480 }
 481
 482 static __DRIimage *
 483 intel_create_image_from_names(__DRIscreen *screen,
 484                               int width, int height, int fourcc,
 485                               int *names, int num_names,
 486                               int *strides, int *offsets,
 487                               void *loaderPrivate)
 488 {
 489     struct intel_image_format *f = NULL;
 490     __DRIimage *image;
 491     int i, index;
 492
 493     if (screen == NULL || names == NULL || num_names != 1)
 494         return NULL;
 495
 496     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 497         if (intel_image_formats[i].fourcc == fourcc) {
 498            f = &intel_image_formats[i];
 499         }
 500     }
 501
 502     if (f == NULL)
 503         return NULL;
 504
 505     image = intel_create_image_from_name(screen, width, height,
 506                                          __DRI_IMAGE_FORMAT_NONE,
 507                                          names[0], strides[0],
 508                                          loaderPrivate);
 509
 510     if (image == NULL)
 511         return NULL;
 512
 513     image->planar_format = f;
 514     for (i = 0; i < f->nplanes; i++) {
 515         index = f->planes[i].buffer_index;
 516         image->offsets[index] = offsets[index];
 517         image->strides[index] = strides[index];
 518     }
 519
 520     return image;
 521 }
 522
 523 static __DRIimage *
 524 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 525 {
 526     int width, height, offset, stride, dri_format, cpp, index, pitch;
 527     struct intel_image_format *f;
 528     uint32_t mask_x, mask_y;
 529     __DRIimage *image;
 530
 531     if (parent == NULL || parent->planar_format == NULL)
 532         return NULL;
 533
 534     f = parent->planar_format;
 535
 536     if (plane >= f->nplanes)
 537         return NULL;
 538
 539     width = parent->region->width >> f->planes[plane].width_shift;
 540     height = parent->region->height >> f->planes[plane].height_shift;
 541     dri_format = f->planes[plane].dri_format;
 542     index = f->planes[plane].buffer_index;
 543     offset = parent->offsets[index];
 544     stride = parent->strides[index];
 545
 546     image = intel_allocate_image(dri_format, loaderPrivate);
 547     cpp = _mesa_get_format_bytes(image->format); /* safe since no none format */
 548     pitch = stride / cpp;
 549     if (offset + height * cpp * pitch > parent->region->bo->size) {
 550        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 551        free(image);
 552        return NULL;
 553     }
 554
 555     image->region = calloc(sizeof(*image->region), 1);
 556     if (image->region == NULL) {
 557        free(image);
 558        return NULL;
 559     }
 560
 561     image->region->cpp = _mesa_get_format_bytes(image->format);
 562     image->region->width = width;
 563     image->region->height = height;
 564     image->region->pitch = pitch;
 565     image->region->refcount = 1;
 566     image->region->bo = parent->region->bo;
 567     drm_intel_bo_reference(image->region->bo);
 568     image->region->tiling = parent->region->tiling;
 569     image->region->screen = parent->region->screen;
 570     image->offset = offset;
 571
 572     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 573     if (offset & mask_x)
 574        _mesa_warning(NULL,
 575                      "intel_create_sub_image: offset not on tile boundary");
 576
 577     return image;
 578 }
 579
 580 static struct __DRIimageExtensionRec intelImageExtension = {
 581     .base = { __DRI_IMAGE, 5 },
 582
 583     .createImageFromName                = intel_create_image_from_name,
 584     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 585     .destroyImage                       = intel_destroy_image,
 586     .createImage                        = intel_create_image,
 587     .queryImage                         = intel_query_image,
 588     .dupImage                           = intel_dup_image,
 589     .validateUsage                      = intel_validate_usage,
 590     .createImageFromNames               = intel_create_image_from_names,
 591     .fromPlanar                         = intel_from_planar
 592 };
 593
 594 static const __DRIextension *intelScreenExtensions[] = {
 595     &intelTexBufferExtension.base,
 596     &intelFlushExtension.base,
 597     &intelImageExtension.base,
 598     &dri2ConfigQueryExtension.base,
 599     NULL
 600 };
 601
 602 static bool
 603 intel_get_param(__DRIscreen *psp, int param, int *value)
 604 {
 605    int ret;
 606    struct drm_i915_getparam gp;
 607
 608    memset(&gp, 0, sizeof(gp));
 609    gp.param = param;
 610    gp.value = value;
 611
 612    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 613    if (ret) {
 614       if (ret != -EINVAL)
 615          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 616       return false;
 617    }
 618
 619    return true;
 620 }
 621
 622 static bool
 623 intel_get_boolean(__DRIscreen *psp, int param)
 624 {
 625    int value = 0;
 626    return intel_get_param(psp, param, &value) && value;
 627 }
 628
 629 static void
 630 nop_callback(GLuint key, void *data, void *userData)
 631 {
 632 }
 633
 634 static void
 635 intelDestroyScreen(__DRIscreen * sPriv)
 636 {
 637    struct intel_screen *intelScreen = sPriv->driverPrivate;
 638
 639    dri_bufmgr_destroy(intelScreen->bufmgr);
 640    driDestroyOptionInfo(&intelScreen->optionCache);
 641
 642    /* Some regions may still have references to them at this point, so
 643     * flush the hash table to prevent _mesa_DeleteHashTable() from
 644     * complaining about the hash not being empty; */
 645    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 646    _mesa_DeleteHashTable(intelScreen->named_regions);
 647
 648    free(intelScreen);
 649    sPriv->driverPrivate = NULL;
 650 }
 651
 652
 653 /**
 654  * This is called when we need to set up GL rendering to a new X window.
 655  */
 656 static GLboolean
 657 intelCreateBuffer(__DRIscreen * driScrnPriv,
 658                   __DRIdrawable * driDrawPriv,
 659                   const struct gl_config * mesaVis, GLboolean isPixmap)
 660 {
 661    struct intel_renderbuffer *rb;
 662    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 663    gl_format rgbFormat;
 664    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 665    struct gl_framebuffer *fb;
 666
 667    if (isPixmap)
 668       return false;
 669
 670    fb = CALLOC_STRUCT(gl_framebuffer);
 671    if (!fb)
 672       return false;
 673
 674    _mesa_initialize_window_framebuffer(fb, mesaVis);
 675
 676    if (mesaVis->redBits == 5)
 677       rgbFormat = MESA_FORMAT_RGB565;
 678    else if (mesaVis->sRGBCapable)
 679       rgbFormat = MESA_FORMAT_SARGB8;
 680    else if (mesaVis->alphaBits == 0)
 681       rgbFormat = MESA_FORMAT_XRGB8888;
 682    else
 683       rgbFormat = MESA_FORMAT_ARGB8888;
 684
 685    /* setup the hardware-based renderbuffers */
 686    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 687    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 688
 689    if (mesaVis->doubleBufferMode) {
 690       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 691       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 692    }
 693
 694    /*
 695     * Assert here that the gl_config has an expected depth/stencil bit
 696     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 697     * which constructs the advertised configs.)
 698     */
 699    if (mesaVis->depthBits == 24) {
 700       assert(mesaVis->stencilBits == 8);
 701
 702       if (screen->hw_has_separate_stencil) {
 703          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 704                                                 num_samples);
 705          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 706          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 707                                                 num_samples);
 708          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 709       } else {
 710          /*
 711           * Use combined depth/stencil. Note that the renderbuffer is
 712           * attached to two attachment points.
 713           */
 714          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 715                                                 num_samples);
 716          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 717          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 718       }
 719    }
 720    else if (mesaVis->depthBits == 16) {
 721       assert(mesaVis->stencilBits == 0);
 722       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 723                                              num_samples);
 724       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 725    }
 726    else {
 727       assert(mesaVis->depthBits == 0);
 728       assert(mesaVis->stencilBits == 0);
 729    }
 730
 731    /* now add any/all software-based renderbuffers we may need */
 732    _swrast_add_soft_renderbuffers(fb,
 733                                   false, /* never sw color */
 734                                   false, /* never sw depth */
 735                                   false, /* never sw stencil */
 736                                   mesaVis->accumRedBits > 0,
 737                                   false, /* never sw alpha */
 738                                   false  /* never sw aux */ );
 739    driDrawPriv->driverPrivate = fb;
 740
 741    return true;
 742 }
 743
 744 static void
 745 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 746 {
 747     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 748
 749     _mesa_reference_framebuffer(&fb, NULL);
 750 }
 751
 752 /* There are probably better ways to do this, such as an
 753  * init-designated function to register chipids and createcontext
 754  * functions.
 755  */
 756 extern bool
 757 i830CreateContext(const struct gl_config *mesaVis,
 758                   __DRIcontext *driContextPriv,
 759                   void *sharedContextPrivate);
 760
 761 extern bool
 762 i915CreateContext(int api,
 763                   const struct gl_config *mesaVis,
 764                   __DRIcontext *driContextPriv,
 765                   unsigned major_version,
 766                   unsigned minor_version,
 767                   unsigned *error,
 768                   void *sharedContextPrivate);
 769 extern bool
 770 brwCreateContext(int api,
 771                  const struct gl_config *mesaVis,
 772                  __DRIcontext *driContextPriv,
 773                  unsigned major_version,
 774                  unsigned minor_version,
 775                  uint32_t flags,
 776                  unsigned *error,
 777                  void *sharedContextPrivate);
 778
 779 static GLboolean
 780 intelCreateContext(gl_api api,
 781                    const struct gl_config * mesaVis,
 782                    __DRIcontext * driContextPriv,
 783                    unsigned major_version,
 784                    unsigned minor_version,
 785                    uint32_t flags,
 786                    unsigned *error,
 787                    void *sharedContextPrivate)
 788 {
 789    bool success = false;
 790
 791 #ifdef I915
 792    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 793    struct intel_screen *intelScreen = sPriv->driverPrivate;
 794
 795    if (IS_9XX(intelScreen->deviceID)) {
 796       success = i915CreateContext(api, mesaVis, driContextPriv,
 797                                   major_version, minor_version, error,
 798                                   sharedContextPrivate);
 799    } else {
 800       switch (api) {
 801       case API_OPENGL_COMPAT:
 802          if (major_version > 1 || minor_version > 3) {
 803             *error = __DRI_CTX_ERROR_BAD_VERSION;
 804             success = false;
 805          }
 806          break;
 807       case API_OPENGLES:
 808          break;
 809       default:
 810          *error = __DRI_CTX_ERROR_BAD_API;
 811          success = false;
 812       }
 813
 814       if (success) {
 815          intelScreen->no_vbo = true;
 816          success = i830CreateContext(mesaVis, driContextPriv,
 817                                      sharedContextPrivate);
 818          if (!success)
 819             *error = __DRI_CTX_ERROR_NO_MEMORY;
 820       }
 821    }
 822 #else
 823    success = brwCreateContext(api, mesaVis,
 824                               driContextPriv,
 825                               major_version, minor_version, flags,
 826                               error, sharedContextPrivate);
 827 #endif
 828
 829    if (success)
 830       return true;
 831
 832    if (driContextPriv->driverPrivate != NULL)
 833       intelDestroyContext(driContextPriv);
 834
 835    return false;
 836 }
 837
 838 static bool
 839 intel_init_bufmgr(struct intel_screen *intelScreen)
 840 {
 841    __DRIscreen *spriv = intelScreen->driScrnPriv;
 842    int num_fences = 0;
 843
 844    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 845
 846    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 847    if (intelScreen->bufmgr == NULL) {
 848       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 849               __func__, __LINE__);
 850       return false;
 851    }
 852
 853    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 854        num_fences == 0) {
 855       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 856       return false;
 857    }
 858
 859    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 860
 861    intelScreen->named_regions = _mesa_NewHashTable();
 862
 863    intelScreen->relaxed_relocations = 0;
 864    intelScreen->relaxed_relocations |=
 865       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 866
 867    return true;
 868 }
 869
 870 /**
 871  * Override intel_screen.hw_has_separate_stencil with environment variable
 872  * INTEL_SEPARATE_STENCIL.
 873  *
 874  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 875  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 876  * is ignored.
 877  */
 878 static void
 879 intel_override_separate_stencil(struct intel_screen *screen)
 880 {
 881    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 882    if (!s) {
 883       return;
 884    } else if (!strncmp("0", s, 2)) {
 885       screen->hw_has_separate_stencil = false;
 886    } else if (!strncmp("1", s, 2)) {
 887       screen->hw_has_separate_stencil = true;
 888    } else {
 889       fprintf(stderr,
 890               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 891               "invalid value and is ignored", s);
 892    }
 893 }
 894
 895 static bool
 896 intel_detect_swizzling(struct intel_screen *screen)
 897 {
 898    drm_intel_bo *buffer;
 899    unsigned long flags = 0;
 900    unsigned long aligned_pitch;
 901    uint32_t tiling = I915_TILING_X;
 902    uint32_t swizzle_mode = 0;
 903
 904    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
 905                                      64, 64, 4,
 906                                      &tiling, &aligned_pitch, flags);
 907    if (buffer == NULL)
 908       return false;
 909
 910    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
 911    drm_intel_bo_unreference(buffer);
 912
 913    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
 914       return false;
 915    else
 916       return true;
 917 }
 918
 919 static __DRIconfig**
 920 intel_screen_make_configs(__DRIscreen *dri_screen)
 921 {
 922    static const gl_format formats[3] = {
 923       MESA_FORMAT_RGB565,
 924       MESA_FORMAT_XRGB8888,
 925       MESA_FORMAT_ARGB8888
 926    };
 927
 928    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
 929    static const GLenum back_buffer_modes[] = {
 930        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
 931    };
 932
 933    static const uint8_t singlesample_samples[1] = {0};
 934    static const uint8_t multisample_samples[2]  = {4, 8};
 935
 936    struct intel_screen *screen = dri_screen->driverPrivate;
 937    uint8_t depth_bits[4], stencil_bits[4];
 938    __DRIconfig **configs = NULL;
 939
 940    /* Generate singlesample configs without accumulation buffer. */
 941    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
 942       __DRIconfig **new_configs;
 943       int num_depth_stencil_bits = 2;
 944
 945       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 946        * buffer that has a different number of bits per pixel than the color
 947        * buffer, gen >= 6 supports this.
 948        */
 949       depth_bits[0] = 0;
 950       stencil_bits[0] = 0;
 951
 952       if (formats[i] == MESA_FORMAT_RGB565) {
 953          depth_bits[1] = 16;
 954          stencil_bits[1] = 0;
 955          if (screen->gen >= 6) {
 956              depth_bits[2] = 24;
 957              stencil_bits[2] = 8;
 958              num_depth_stencil_bits = 3;
 959          }
 960       } else {
 961          depth_bits[1] = 24;
 962          stencil_bits[1] = 8;
 963       }
 964
 965       new_configs = driCreateConfigs(formats[i],
 966                                      depth_bits,
 967                                      stencil_bits,
 968                                      num_depth_stencil_bits,
 969                                      back_buffer_modes, 2,
 970                                      singlesample_samples, 1,
 971                                      false);
 972       configs = driConcatConfigs(configs, new_configs);
 973    }
 974
 975    /* Generate the minimum possible set of configs that include an
 976     * accumulation buffer.
 977     */
 978    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
 979       __DRIconfig **new_configs;
 980
 981       if (formats[i] == MESA_FORMAT_RGB565) {
 982          depth_bits[0] = 16;
 983          stencil_bits[0] = 0;
 984       } else {
 985          depth_bits[0] = 24;
 986          stencil_bits[0] = 8;
 987       }
 988
 989       new_configs = driCreateConfigs(formats[i],
 990                                      depth_bits, stencil_bits, 1,
 991                                      back_buffer_modes, 1,
 992                                      singlesample_samples, 1,
 993                                      true);
 994       configs = driConcatConfigs(configs, new_configs);
 995    }
 996
 997    /* Generate multisample configs.
 998     *
 999     * This loop breaks early, and hence is a no-op, on gen < 6.
1000     *
1001     * Multisample configs must follow the singlesample configs in order to
1002     * work around an X server bug present in 1.12. The X server chooses to
1003     * associate the first listed RGBA888-Z24S8 config, regardless of its
1004     * sample count, with the 32-bit depth visual used for compositing.
1005     *
1006     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1007     * supported.  Singlebuffer configs are not supported because no one wants
1008     * them.
1009     */
1010    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1011       if (screen->gen < 6)
1012          break;
1013
1014       __DRIconfig **new_configs;
1015       const int num_depth_stencil_bits = 2;
1016       int num_msaa_modes = 0;
1017
1018       depth_bits[0] = 0;
1019       stencil_bits[0] = 0;
1020
1021       if (formats[i] == MESA_FORMAT_RGB565) {
1022          depth_bits[1] = 16;
1023          stencil_bits[1] = 0;
1024       } else {
1025          depth_bits[1] = 24;
1026          stencil_bits[1] = 8;
1027       }
1028
1029       if (screen->gen >= 7)
1030          num_msaa_modes = 2;
1031       else if (screen->gen == 6)
1032          num_msaa_modes = 1;
1033
1034       new_configs = driCreateConfigs(formats[i],
1035                                      depth_bits,
1036                                      stencil_bits,
1037                                      num_depth_stencil_bits,
1038                                      back_buffer_modes, 1,
1039                                      multisample_samples,
1040                                      num_msaa_modes,
1041                                      false);
1042       configs = driConcatConfigs(configs, new_configs);
1043    }
1044
1045    if (configs == NULL) {
1046       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1047               __LINE__);
1048       return NULL;
1049    }
1050
1051    return configs;
1052 }
1053
1054 static void
1055 set_max_gl_versions(struct intel_screen *screen)
1056 {
1057 #ifdef TEXTURE_FLOAT_ENABLED
1058    bool has_texture_float = true;
1059 #else
1060    bool has_texture_float = false;
1061 #endif
1062
1063    switch (screen->gen) {
1064    case 7:
1065       if (has_texture_float && screen->kernel_has_gen7_sol_reset) {
1066          screen->max_gl_core_version = 31;
1067          screen->max_gl_compat_version = 30;
1068          screen->max_gl_es1_version = 11;
1069          screen->max_gl_es2_version = 20;
1070       } else {
1071          screen->max_gl_core_version = 0;
1072          screen->max_gl_compat_version = 21;
1073          screen->max_gl_es1_version = 11;
1074          screen->max_gl_es2_version = 20;
1075       }
1076       break;
1077    case 6:
1078       if (has_texture_float) {
1079          screen->max_gl_core_version = 31;
1080          screen->max_gl_compat_version = 30;
1081          screen->max_gl_es1_version = 11;
1082          screen->max_gl_es2_version = 20;
1083       } else {
1084          screen->max_gl_core_version = 0;
1085          screen->max_gl_compat_version = 21;
1086          screen->max_gl_es1_version = 11;
1087          screen->max_gl_es2_version = 20;
1088       }
1089       break;
1090    case 5:
1091    case 4:
1092       screen->max_gl_core_version = 0;
1093       screen->max_gl_compat_version = 21;
1094       screen->max_gl_es1_version = 11;
1095       screen->max_gl_es2_version = 20;
1096       break;
1097    case 3: {
1098       bool has_fragment_shader = driQueryOptionb(&screen->optionCache, "fragment_shader");
1099       bool has_occlusion_query = driQueryOptionb(&screen->optionCache, "stub_occlusion_query");
1100
1101       screen->max_gl_core_version = 0;
1102       screen->max_gl_es1_version = 11;
1103
1104       if (has_fragment_shader && has_occlusion_query) {
1105          screen->max_gl_compat_version = 21;
1106       } else {
1107          screen->max_gl_compat_version = 14;
1108       }
1109
1110       if (has_fragment_shader) {
1111          screen->max_gl_es2_version = 20;
1112       } else {
1113          screen->max_gl_es2_version = 0;
1114       }
1115
1116       break;
1117    }
1118    case 2:
1119       screen->max_gl_core_version = 0;
1120       screen->max_gl_compat_version = 13;
1121       screen->max_gl_es1_version = 11;
1122       screen->max_gl_es2_version = 0;
1123       break;
1124    default:
1125       assert(!"unrecognized intel_screen::gen");
1126       break;
1127    }
1128
1129 #ifndef FEATURE_ES1
1130    screen->max_gl_es1_version = 0;
1131 #endif
1132
1133 #ifndef FEATURE_ES2
1134    screen->max_gl_es2_version = 0;
1135 #endif
1136 }
1137
1138 /**
1139  * This is the driver specific part of the createNewScreen entry point.
1140  * Called when using DRI2.
1141  *
1142  * \return the struct gl_config supported by this driver
1143  */
1144 static const
1145 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1146 {
1147    struct intel_screen *intelScreen;
1148
1149    if (psp->dri2.loader->base.version <= 2 ||
1150        psp->dri2.loader->getBuffersWithFormat == NULL) {
1151       fprintf(stderr,
1152               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1153               "support required\n");
1154       return false;
1155    }
1156
1157    /* Allocate the private area */
1158    intelScreen = calloc(1, sizeof *intelScreen);
1159    if (!intelScreen) {
1160       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1161       return false;
1162    }
1163    /* parse information in __driConfigOptions */
1164    driParseOptionInfo(&intelScreen->optionCache,
1165                       __driConfigOptions, __driNConfigOptions);
1166
1167    intelScreen->driScrnPriv = psp;
1168    psp->driverPrivate = (void *) intelScreen;
1169
1170    if (!intel_init_bufmgr(intelScreen))
1171        return false;
1172
1173    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1174
1175    intelScreen->kernel_has_gen7_sol_reset =
1176       intel_get_boolean(intelScreen->driScrnPriv,
1177                         I915_PARAM_HAS_GEN7_SOL_RESET);
1178
1179    if (IS_GEN7(intelScreen->deviceID)) {
1180       intelScreen->gen = 7;
1181    } else if (IS_GEN6(intelScreen->deviceID)) {
1182       intelScreen->gen = 6;
1183    } else if (IS_GEN5(intelScreen->deviceID)) {
1184       intelScreen->gen = 5;
1185    } else if (IS_965(intelScreen->deviceID)) {
1186       intelScreen->gen = 4;
1187    } else if (IS_9XX(intelScreen->deviceID)) {
1188       intelScreen->gen = 3;
1189    } else {
1190       intelScreen->gen = 2;
1191    }
1192
1193    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1194    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1195
1196    int has_llc = 0;
1197    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1198                                   &has_llc);
1199    if (success && has_llc)
1200       intelScreen->hw_has_llc = true;
1201    else if (!success && intelScreen->gen >= 6)
1202       intelScreen->hw_has_llc = true;
1203
1204    intel_override_separate_stencil(intelScreen);
1205
1206    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1207
1208    set_max_gl_versions(intelScreen);
1209
1210    psp->api_mask = (1 << __DRI_API_OPENGL);
1211    if (intelScreen->max_gl_es1_version > 0)
1212       psp->api_mask |= (1 << __DRI_API_GLES);
1213    if (intelScreen->max_gl_es2_version > 0)
1214       psp->api_mask |= (1 << __DRI_API_GLES2);
1215
1216    psp->extensions = intelScreenExtensions;
1217
1218    return (const __DRIconfig**) intel_screen_make_configs(psp);
1219 }
1220
1221 struct intel_buffer {
1222    __DRIbuffer base;
1223    struct intel_region *region;
1224 };
1225
1226 static __DRIbuffer *
1227 intelAllocateBuffer(__DRIscreen *screen,
1228                     unsigned attachment, unsigned format,
1229                     int width, int height)
1230 {
1231    struct intel_buffer *intelBuffer;
1232    struct intel_screen *intelScreen = screen->driverPrivate;
1233
1234    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1235           attachment == __DRI_BUFFER_BACK_LEFT);
1236
1237    intelBuffer = calloc(1, sizeof *intelBuffer);
1238    if (intelBuffer == NULL)
1239       return NULL;
1240
1241    /* The front and back buffers are color buffers, which are X tiled. */
1242    intelBuffer->region = intel_region_alloc(intelScreen,
1243                                             I915_TILING_X,
1244                                             format / 8,
1245                                             width,
1246                                             height,
1247                                             true);
1248
1249    if (intelBuffer->region == NULL) {
1250            free(intelBuffer);
1251            return NULL;
1252    }
1253
1254    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1255
1256    intelBuffer->base.attachment = attachment;
1257    intelBuffer->base.cpp = intelBuffer->region->cpp;
1258    intelBuffer->base.pitch =
1259          intelBuffer->region->pitch * intelBuffer->region->cpp;
1260
1261    return &intelBuffer->base;
1262 }
1263
1264 static void
1265 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1266 {
1267    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1268
1269    intel_region_release(&intelBuffer->region);
1270    free(intelBuffer);
1271 }
1272
1273
1274 const struct __DriverAPIRec driDriverAPI = {
1275    .InitScreen           = intelInitScreen2,
1276    .DestroyScreen        = intelDestroyScreen,
1277    .CreateContext        = intelCreateContext,
1278    .DestroyContext       = intelDestroyContext,
1279    .CreateBuffer         = intelCreateBuffer,
1280    .DestroyBuffer        = intelDestroyBuffer,
1281    .MakeCurrent          = intelMakeCurrent,
1282    .UnbindContext        = intelUnbindContext,
1283    .AllocateBuffer       = intelAllocateBuffer,
1284    .ReleaseBuffer        = intelReleaseBuffer
1285 };
1286
1287 /* This is the table of extensions that the loader will dlsym() for. */
1288 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1289     &driCoreExtension.base,
1290     &driDRI2Extension.base,
1291     NULL
1292 };