src/mesa/drivers/dri/i965/intel_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <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/texobj.h"
  35 #include "main/hash.h"
  36 #include "main/fbobject.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_B(hiz, "true")
  58          DRI_CONF_DESC(en, "Enable Hierarchical Z on gen6+")
  59       DRI_CONF_OPT_END
  60
  61       DRI_CONF_OPT_BEGIN_B(early_z, "false")
  62          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  63       DRI_CONF_OPT_END
  64
  65    DRI_CONF_SECTION_END
  66    DRI_CONF_SECTION_QUALITY
  67       DRI_CONF_FORCE_S3TC_ENABLE("false")
  68       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  69    DRI_CONF_SECTION_END
  70    DRI_CONF_SECTION_DEBUG
  71       DRI_CONF_NO_RAST("false")
  72       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  73       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  74       DRI_CONF_DISABLE_THROTTLING("false")
  75       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  76       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  77       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  78
  79       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  80          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  81       DRI_CONF_OPT_END
  82    DRI_CONF_SECTION_END
  83 DRI_CONF_END;
  84
  85 const GLuint __driNConfigOptions = 14;
  86
  87 #include "intel_batchbuffer.h"
  88 #include "intel_buffers.h"
  89 #include "intel_bufmgr.h"
  90 #include "intel_chipset.h"
  91 #include "intel_fbo.h"
  92 #include "intel_mipmap_tree.h"
  93 #include "intel_screen.h"
  94 #include "intel_tex.h"
  95 #include "intel_regions.h"
  96
  97 #ifndef I915
  98 #include "brw_context.h"
  99 #endif
 100
 101 #include "i915_drm.h"
 102
 103 #ifdef USE_NEW_INTERFACE
 104 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 105 #endif /*USE_NEW_INTERFACE */
 106
 107 /**
 108  * For debugging purposes, this returns a time in seconds.
 109  */
 110 double
 111 get_time(void)
 112 {
 113    struct timespec tp;
 114
 115    clock_gettime(CLOCK_MONOTONIC, &tp);
 116
 117    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 118 }
 119
 120 void
 121 aub_dump_bmp(struct gl_context *ctx)
 122 {
 123    struct gl_framebuffer *fb = ctx->DrawBuffer;
 124
 125    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 126       struct intel_renderbuffer *irb =
 127          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 128
 129       if (irb && irb->mt) {
 130          enum aub_dump_bmp_format format;
 131
 132          switch (irb->Base.Base.Format) {
 133          case MESA_FORMAT_ARGB8888:
 134          case MESA_FORMAT_XRGB8888:
 135             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 136             break;
 137          default:
 138             continue;
 139          }
 140
 141          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 142          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 143                                        irb->draw_x,
 144                                        irb->draw_y,
 145                                        irb->Base.Base.Width,
 146                                        irb->Base.Base.Height,
 147                                        format,
 148                                        irb->mt->region->pitch,
 149                                        0);
 150       }
 151    }
 152 }
 153
 154 static const __DRItexBufferExtension intelTexBufferExtension = {
 155    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 156
 157    .setTexBuffer        = intelSetTexBuffer,
 158    .setTexBuffer2       = intelSetTexBuffer2,
 159    .releaseTexBuffer    = NULL,
 160 };
 161
 162 static void
 163 intelDRI2Flush(__DRIdrawable *drawable)
 164 {
 165    GET_CURRENT_CONTEXT(ctx);
 166    struct intel_context *intel = intel_context(ctx);
 167    if (intel == NULL)
 168       return;
 169
 170    intel_resolve_for_dri2_flush(intel, drawable);
 171    intel->need_throttle = true;
 172
 173    if (intel->batch.used)
 174       intel_batchbuffer_flush(intel);
 175
 176    if (INTEL_DEBUG & DEBUG_AUB) {
 177       aub_dump_bmp(ctx);
 178    }
 179 }
 180
 181 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 182     .base = { __DRI2_FLUSH, 3 },
 183
 184     .flush              = intelDRI2Flush,
 185     .invalidate         = dri2InvalidateDrawable,
 186 };
 187
 188 static struct intel_image_format intel_image_formats[] = {
 189    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 190      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 191
 192    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 193      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 194
 195    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 196      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 197        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 198        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 199
 200    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 201      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 202        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 203        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 204
 205    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 206      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 207        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 208        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 209
 210    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 211      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 212        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 213        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 214
 215    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 216      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 217        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 218        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 219
 220    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 221      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 222        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 223
 224    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 225      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 226        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 227
 228    /* For YUYV buffers, we set up two overlapping DRI images and treat
 229     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 230     * samples YU or YV pairs and places Y into the R component, while
 231     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 232     * places U into the G component and V into A.  This lets the
 233     * texture sampler interpolate the Y components correctly when
 234     * sampling from plane 0, and interpolate U and V correctly when
 235     * sampling from plane 1. */
 236    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 237      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 238        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 239 };
 240
 241 static __DRIimage *
 242 intel_allocate_image(int dri_format, void *loaderPrivate)
 243 {
 244     __DRIimage *image;
 245
 246     image = calloc(1, sizeof *image);
 247     if (image == NULL)
 248         return NULL;
 249
 250     image->dri_format = dri_format;
 251     image->offset = 0;
 252
 253     switch (dri_format) {
 254     case __DRI_IMAGE_FORMAT_RGB565:
 255        image->format = MESA_FORMAT_RGB565;
 256        break;
 257     case __DRI_IMAGE_FORMAT_XRGB8888:
 258        image->format = MESA_FORMAT_XRGB8888;
 259        break;
 260     case __DRI_IMAGE_FORMAT_ARGB8888:
 261        image->format = MESA_FORMAT_ARGB8888;
 262        break;
 263     case __DRI_IMAGE_FORMAT_ABGR8888:
 264        image->format = MESA_FORMAT_RGBA8888_REV;
 265        break;
 266     case __DRI_IMAGE_FORMAT_XBGR8888:
 267        image->format = MESA_FORMAT_RGBX8888_REV;
 268        break;
 269     case __DRI_IMAGE_FORMAT_R8:
 270        image->format = MESA_FORMAT_R8;
 271        break;
 272     case __DRI_IMAGE_FORMAT_GR88:
 273        image->format = MESA_FORMAT_GR88;
 274        break;
 275     case __DRI_IMAGE_FORMAT_NONE:
 276        image->format = MESA_FORMAT_NONE;
 277        break;
 278     default:
 279        free(image);
 280        return NULL;
 281     }
 282
 283     image->internal_format = _mesa_get_format_base_format(image->format);
 284     image->data = loaderPrivate;
 285
 286     return image;
 287 }
 288
 289 /**
 290  * Sets up a DRIImage structure to point to our shared image in a region
 291  */
 292 static void
 293 intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
 294                                    struct intel_mipmap_tree *mt, GLuint level,
 295                                    GLuint zoffset)
 296 {
 297    unsigned int draw_x, draw_y;
 298    uint32_t mask_x, mask_y;
 299
 300    intel_miptree_make_shareable(intel, mt);
 301
 302    intel_miptree_check_level_layer(mt, level, zoffset);
 303
 304    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 305    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 306
 307    image->width = mt->level[level].width;
 308    image->height = mt->level[level].height;
 309    image->tile_x = draw_x & mask_x;
 310    image->tile_y = draw_y & mask_y;
 311
 312    image->offset = intel_region_get_aligned_offset(mt->region,
 313                                                    draw_x & ~mask_x,
 314                                                    draw_y & ~mask_y,
 315                                                    false);
 316
 317    intel_region_reference(&image->region, mt->region);
 318 }
 319
 320 static void
 321 intel_setup_image_from_dimensions(__DRIimage *image)
 322 {
 323    image->width    = image->region->width;
 324    image->height   = image->region->height;
 325    image->tile_x = 0;
 326    image->tile_y = 0;
 327    image->has_depthstencil = false;
 328 }
 329
 330 static inline uint32_t
 331 intel_dri_format(GLuint format)
 332 {
 333    switch (format) {
 334    case MESA_FORMAT_RGB565:
 335       return __DRI_IMAGE_FORMAT_RGB565;
 336    case MESA_FORMAT_XRGB8888:
 337       return __DRI_IMAGE_FORMAT_XRGB8888;
 338    case MESA_FORMAT_ARGB8888:
 339       return __DRI_IMAGE_FORMAT_ARGB8888;
 340    case MESA_FORMAT_RGBA8888_REV:
 341       return __DRI_IMAGE_FORMAT_ABGR8888;
 342    case MESA_FORMAT_R8:
 343       return __DRI_IMAGE_FORMAT_R8;
 344    case MESA_FORMAT_RG88:
 345       return __DRI_IMAGE_FORMAT_GR88;
 346    }
 347
 348    return MESA_FORMAT_NONE;
 349 }
 350
 351 static __DRIimage *
 352 intel_create_image_from_name(__DRIscreen *screen,
 353                              int width, int height, int format,
 354                              int name, int pitch, void *loaderPrivate)
 355 {
 356     struct intel_screen *intelScreen = screen->driverPrivate;
 357     __DRIimage *image;
 358     int cpp;
 359
 360     image = intel_allocate_image(format, loaderPrivate);
 361     if (image == NULL)
 362        return NULL;
 363
 364     if (image->format == MESA_FORMAT_NONE)
 365        cpp = 1;
 366     else
 367        cpp = _mesa_get_format_bytes(image->format);
 368     image->region = intel_region_alloc_for_handle(intelScreen,
 369                                                   cpp, width, height,
 370                                                   pitch * cpp, name, "image");
 371     if (image->region == NULL) {
 372        free(image);
 373        return NULL;
 374     }
 375
 376     intel_setup_image_from_dimensions(image);
 377
 378     return image;
 379 }
 380
 381 static __DRIimage *
 382 intel_create_image_from_renderbuffer(__DRIcontext *context,
 383                                      int renderbuffer, void *loaderPrivate)
 384 {
 385    __DRIimage *image;
 386    struct intel_context *intel = context->driverPrivate;
 387    struct gl_renderbuffer *rb;
 388    struct intel_renderbuffer *irb;
 389
 390    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 391    if (!rb) {
 392       _mesa_error(&intel->ctx,
 393                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 394       return NULL;
 395    }
 396
 397    irb = intel_renderbuffer(rb);
 398    intel_miptree_make_shareable(intel, irb->mt);
 399    image = calloc(1, sizeof *image);
 400    if (image == NULL)
 401       return NULL;
 402
 403    image->internal_format = rb->InternalFormat;
 404    image->format = rb->Format;
 405    image->offset = 0;
 406    image->data = loaderPrivate;
 407    intel_region_reference(&image->region, irb->mt->region);
 408    intel_setup_image_from_dimensions(image);
 409    image->dri_format = intel_dri_format(image->format);
 410    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 411
 412    rb->NeedsFinishRenderTexture = true;
 413    return image;
 414 }
 415
 416 static __DRIimage *
 417 intel_create_image_from_texture(__DRIcontext *context, int target,
 418                                 unsigned texture, int zoffset,
 419                                 int level,
 420                                 unsigned *error,
 421                                 void *loaderPrivate)
 422 {
 423    __DRIimage *image;
 424    struct intel_context *intel = context->driverPrivate;
 425    struct gl_texture_object *obj;
 426    struct intel_texture_object *iobj;
 427    GLuint face = 0;
 428
 429    obj = _mesa_lookup_texture(&intel->ctx, texture);
 430    if (!obj || obj->Target != target) {
 431       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 432       return NULL;
 433    }
 434
 435    if (target == GL_TEXTURE_CUBE_MAP)
 436       face = zoffset;
 437
 438    _mesa_test_texobj_completeness(&intel->ctx, obj);
 439    iobj = intel_texture_object(obj);
 440    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 441       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 442       return NULL;
 443    }
 444
 445    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 446       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 447       return NULL;
 448    }
 449
 450    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 451       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 452       return NULL;
 453    }
 454    image = calloc(1, sizeof *image);
 455    if (image == NULL) {
 456       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 457       return NULL;
 458    }
 459
 460    image->internal_format = obj->Image[face][level]->InternalFormat;
 461    image->format = obj->Image[face][level]->TexFormat;
 462    image->data = loaderPrivate;
 463    intel_setup_image_from_mipmap_tree(intel, image, iobj->mt, level, zoffset);
 464    image->dri_format = intel_dri_format(image->format);
 465    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 466    if (image->dri_format == MESA_FORMAT_NONE) {
 467       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 468       free(image);
 469       return NULL;
 470    }
 471
 472    *error = __DRI_IMAGE_ERROR_SUCCESS;
 473    return image;
 474 }
 475
 476 static void
 477 intel_destroy_image(__DRIimage *image)
 478 {
 479     intel_region_release(&image->region);
 480     free(image);
 481 }
 482
 483 static __DRIimage *
 484 intel_create_image(__DRIscreen *screen,
 485                    int width, int height, int format,
 486                    unsigned int use,
 487                    void *loaderPrivate)
 488 {
 489    __DRIimage *image;
 490    struct intel_screen *intelScreen = screen->driverPrivate;
 491    uint32_t tiling;
 492    int cpp;
 493
 494    tiling = I915_TILING_X;
 495    if (use & __DRI_IMAGE_USE_CURSOR) {
 496       if (width != 64 || height != 64)
 497          return NULL;
 498       tiling = I915_TILING_NONE;
 499    }
 500
 501    image = intel_allocate_image(format, loaderPrivate);
 502    if (image == NULL)
 503       return NULL;
 504
 505    cpp = _mesa_get_format_bytes(image->format);
 506    image->region =
 507       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 508    if (image->region == NULL) {
 509       free(image);
 510       return NULL;
 511    }
 512
 513    intel_setup_image_from_dimensions(image);
 514
 515    return image;
 516 }
 517
 518 static GLboolean
 519 intel_query_image(__DRIimage *image, int attrib, int *value)
 520 {
 521    switch (attrib) {
 522    case __DRI_IMAGE_ATTRIB_STRIDE:
 523       *value = image->region->pitch;
 524       return true;
 525    case __DRI_IMAGE_ATTRIB_HANDLE:
 526       *value = image->region->bo->handle;
 527       return true;
 528    case __DRI_IMAGE_ATTRIB_NAME:
 529       return intel_region_flink(image->region, (uint32_t *) value);
 530    case __DRI_IMAGE_ATTRIB_FORMAT:
 531       *value = image->dri_format;
 532       return true;
 533    case __DRI_IMAGE_ATTRIB_WIDTH:
 534       *value = image->region->width;
 535       return true;
 536    case __DRI_IMAGE_ATTRIB_HEIGHT:
 537       *value = image->region->height;
 538       return true;
 539    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 540       if (image->planar_format == NULL)
 541          return false;
 542       *value = image->planar_format->components;
 543       return true;
 544    case __DRI_IMAGE_ATTRIB_FD:
 545       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 546          return true;
 547       return false;
 548   default:
 549       return false;
 550    }
 551 }
 552
 553 static __DRIimage *
 554 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 555 {
 556    __DRIimage *image;
 557
 558    image = calloc(1, sizeof *image);
 559    if (image == NULL)
 560       return NULL;
 561
 562    intel_region_reference(&image->region, orig_image->region);
 563    if (image->region == NULL) {
 564       free(image);
 565       return NULL;
 566    }
 567
 568    image->internal_format = orig_image->internal_format;
 569    image->planar_format   = orig_image->planar_format;
 570    image->dri_format      = orig_image->dri_format;
 571    image->format          = orig_image->format;
 572    image->offset          = orig_image->offset;
 573    image->width           = orig_image->width;
 574    image->height          = orig_image->height;
 575    image->tile_x          = orig_image->tile_x;
 576    image->tile_y          = orig_image->tile_y;
 577    image->has_depthstencil = orig_image->has_depthstencil;
 578    image->data            = loaderPrivate;
 579
 580    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 581    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 582
 583    return image;
 584 }
 585
 586 static GLboolean
 587 intel_validate_usage(__DRIimage *image, unsigned int use)
 588 {
 589    if (use & __DRI_IMAGE_USE_CURSOR) {
 590       if (image->region->width != 64 || image->region->height != 64)
 591          return GL_FALSE;
 592    }
 593
 594    return GL_TRUE;
 595 }
 596
 597 static __DRIimage *
 598 intel_create_image_from_names(__DRIscreen *screen,
 599                               int width, int height, int fourcc,
 600                               int *names, int num_names,
 601                               int *strides, int *offsets,
 602                               void *loaderPrivate)
 603 {
 604     struct intel_image_format *f = NULL;
 605     __DRIimage *image;
 606     int i, index;
 607
 608     if (screen == NULL || names == NULL || num_names != 1)
 609         return NULL;
 610
 611     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 612         if (intel_image_formats[i].fourcc == fourcc) {
 613            f = &intel_image_formats[i];
 614         }
 615     }
 616
 617     if (f == NULL)
 618         return NULL;
 619
 620     image = intel_create_image_from_name(screen, width, height,
 621                                          __DRI_IMAGE_FORMAT_NONE,
 622                                          names[0], strides[0],
 623                                          loaderPrivate);
 624
 625    if (image == NULL)
 626       return NULL;
 627
 628     image->planar_format = f;
 629     for (i = 0; i < f->nplanes; i++) {
 630         index = f->planes[i].buffer_index;
 631         image->offsets[index] = offsets[index];
 632         image->strides[index] = strides[index];
 633     }
 634
 635     return image;
 636 }
 637
 638 static __DRIimage *
 639 intel_create_image_from_fds(__DRIscreen *screen,
 640                             int width, int height, int fourcc,
 641                             int *fds, int num_fds, int *strides, int *offsets,
 642                             void *loaderPrivate)
 643 {
 644    struct intel_screen *intelScreen = screen->driverPrivate;
 645    struct intel_image_format *f = NULL;
 646    __DRIimage *image;
 647    int i, index;
 648
 649    if (fds == NULL || num_fds != 1)
 650       return NULL;
 651
 652    for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 653       if (intel_image_formats[i].fourcc == fourcc) {
 654          f = &intel_image_formats[i];
 655       }
 656    }
 657
 658    if (f == NULL)
 659       return NULL;
 660
 661    image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 662    if (image == NULL)
 663       return NULL;
 664
 665    image->region = intel_region_alloc_for_fd(intelScreen,
 666                                              1, width, height,
 667                                              strides[0], fds[0], "image");
 668    if (image->region == NULL) {
 669       free(image);
 670       return NULL;
 671    }
 672
 673    image->planar_format = f;
 674    for (i = 0; i < f->nplanes; i++) {
 675       index = f->planes[i].buffer_index;
 676       image->offsets[index] = offsets[index];
 677       image->strides[index] = strides[index];
 678    }
 679
 680    return image;
 681 }
 682
 683
 684 static __DRIimage *
 685 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 686 {
 687     int width, height, offset, stride, dri_format, index;
 688     struct intel_image_format *f;
 689     uint32_t mask_x, mask_y;
 690     __DRIimage *image;
 691
 692     if (parent == NULL || parent->planar_format == NULL)
 693         return NULL;
 694
 695     f = parent->planar_format;
 696
 697     if (plane >= f->nplanes)
 698         return NULL;
 699
 700     width = parent->region->width >> f->planes[plane].width_shift;
 701     height = parent->region->height >> f->planes[plane].height_shift;
 702     dri_format = f->planes[plane].dri_format;
 703     index = f->planes[plane].buffer_index;
 704     offset = parent->offsets[index];
 705     stride = parent->strides[index];
 706
 707     image = intel_allocate_image(dri_format, loaderPrivate);
 708     if (image == NULL)
 709        return NULL;
 710
 711     if (offset + height * stride > parent->region->bo->size) {
 712        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 713        free(image);
 714        return NULL;
 715     }
 716
 717     image->region = calloc(sizeof(*image->region), 1);
 718     if (image->region == NULL) {
 719        free(image);
 720        return NULL;
 721     }
 722
 723     image->region->cpp = _mesa_get_format_bytes(image->format);
 724     image->region->width = width;
 725     image->region->height = height;
 726     image->region->pitch = stride;
 727     image->region->refcount = 1;
 728     image->region->bo = parent->region->bo;
 729     drm_intel_bo_reference(image->region->bo);
 730     image->region->tiling = parent->region->tiling;
 731     image->offset = offset;
 732     intel_setup_image_from_dimensions(image);
 733
 734     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 735     if (offset & mask_x)
 736        _mesa_warning(NULL,
 737                      "intel_create_sub_image: offset not on tile boundary");
 738
 739     return image;
 740 }
 741
 742 static struct __DRIimageExtensionRec intelImageExtension = {
 743     .base = { __DRI_IMAGE, 7 },
 744
 745     .createImageFromName                = intel_create_image_from_name,
 746     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 747     .destroyImage                       = intel_destroy_image,
 748     .createImage                        = intel_create_image,
 749     .queryImage                         = intel_query_image,
 750     .dupImage                           = intel_dup_image,
 751     .validateUsage                      = intel_validate_usage,
 752     .createImageFromNames               = intel_create_image_from_names,
 753     .fromPlanar                         = intel_from_planar,
 754     .createImageFromTexture             = intel_create_image_from_texture,
 755     .createImageFromFds                 = intel_create_image_from_fds
 756 };
 757
 758 static const __DRIextension *intelScreenExtensions[] = {
 759     &intelTexBufferExtension.base,
 760     &intelFlushExtension.base,
 761     &intelImageExtension.base,
 762     &dri2ConfigQueryExtension.base,
 763     NULL
 764 };
 765
 766 static bool
 767 intel_get_param(__DRIscreen *psp, int param, int *value)
 768 {
 769    int ret;
 770    struct drm_i915_getparam gp;
 771
 772    memset(&gp, 0, sizeof(gp));
 773    gp.param = param;
 774    gp.value = value;
 775
 776    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 777    if (ret) {
 778       if (ret != -EINVAL)
 779          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 780       return false;
 781    }
 782
 783    return true;
 784 }
 785
 786 static bool
 787 intel_get_boolean(__DRIscreen *psp, int param)
 788 {
 789    int value = 0;
 790    return intel_get_param(psp, param, &value) && value;
 791 }
 792
 793 static void
 794 intelDestroyScreen(__DRIscreen * sPriv)
 795 {
 796    struct intel_screen *intelScreen = sPriv->driverPrivate;
 797
 798    dri_bufmgr_destroy(intelScreen->bufmgr);
 799    driDestroyOptionInfo(&intelScreen->optionCache);
 800
 801    free(intelScreen);
 802    sPriv->driverPrivate = NULL;
 803 }
 804
 805
 806 /**
 807  * This is called when we need to set up GL rendering to a new X window.
 808  */
 809 static GLboolean
 810 intelCreateBuffer(__DRIscreen * driScrnPriv,
 811                   __DRIdrawable * driDrawPriv,
 812                   const struct gl_config * mesaVis, GLboolean isPixmap)
 813 {
 814    struct intel_renderbuffer *rb;
 815    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 816    gl_format rgbFormat;
 817    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 818    struct gl_framebuffer *fb;
 819
 820    if (isPixmap)
 821       return false;
 822
 823    fb = CALLOC_STRUCT(gl_framebuffer);
 824    if (!fb)
 825       return false;
 826
 827    _mesa_initialize_window_framebuffer(fb, mesaVis);
 828
 829    if (mesaVis->redBits == 5)
 830       rgbFormat = MESA_FORMAT_RGB565;
 831    else if (mesaVis->sRGBCapable)
 832       rgbFormat = MESA_FORMAT_SARGB8;
 833    else if (mesaVis->alphaBits == 0)
 834       rgbFormat = MESA_FORMAT_XRGB8888;
 835    else {
 836       rgbFormat = MESA_FORMAT_SARGB8;
 837       fb->Visual.sRGBCapable = true;
 838    }
 839
 840    /* setup the hardware-based renderbuffers */
 841    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 842    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 843
 844    if (mesaVis->doubleBufferMode) {
 845       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 846       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 847    }
 848
 849    /*
 850     * Assert here that the gl_config has an expected depth/stencil bit
 851     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 852     * which constructs the advertised configs.)
 853     */
 854    if (mesaVis->depthBits == 24) {
 855       assert(mesaVis->stencilBits == 8);
 856
 857       if (screen->hw_has_separate_stencil) {
 858          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 859                                                 num_samples);
 860          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 861          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 862                                                 num_samples);
 863          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 864       } else {
 865          /*
 866           * Use combined depth/stencil. Note that the renderbuffer is
 867           * attached to two attachment points.
 868           */
 869          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 870                                                 num_samples);
 871          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 872          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 873       }
 874    }
 875    else if (mesaVis->depthBits == 16) {
 876       assert(mesaVis->stencilBits == 0);
 877       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 878                                              num_samples);
 879       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 880    }
 881    else {
 882       assert(mesaVis->depthBits == 0);
 883       assert(mesaVis->stencilBits == 0);
 884    }
 885
 886    /* now add any/all software-based renderbuffers we may need */
 887    _swrast_add_soft_renderbuffers(fb,
 888                                   false, /* never sw color */
 889                                   false, /* never sw depth */
 890                                   false, /* never sw stencil */
 891                                   mesaVis->accumRedBits > 0,
 892                                   false, /* never sw alpha */
 893                                   false  /* never sw aux */ );
 894    driDrawPriv->driverPrivate = fb;
 895
 896    return true;
 897 }
 898
 899 static void
 900 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 901 {
 902     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 903
 904     _mesa_reference_framebuffer(&fb, NULL);
 905 }
 906
 907 /* There are probably better ways to do this, such as an
 908  * init-designated function to register chipids and createcontext
 909  * functions.
 910  */
 911 extern bool
 912 i830CreateContext(int api,
 913                   const struct gl_config *mesaVis,
 914                   __DRIcontext *driContextPriv,
 915                   unsigned major_version,
 916                   unsigned minor_version,
 917                   unsigned *error,
 918                   void *sharedContextPrivate);
 919
 920 extern bool
 921 i915CreateContext(int api,
 922                   const struct gl_config *mesaVis,
 923                   __DRIcontext *driContextPriv,
 924                   unsigned major_version,
 925                   unsigned minor_version,
 926                   unsigned *error,
 927                   void *sharedContextPrivate);
 928 extern bool
 929 brwCreateContext(int api,
 930                  const struct gl_config *mesaVis,
 931                  __DRIcontext *driContextPriv,
 932                  unsigned major_version,
 933                  unsigned minor_version,
 934                  uint32_t flags,
 935                  unsigned *error,
 936                  void *sharedContextPrivate);
 937
 938 static GLboolean
 939 intelCreateContext(gl_api api,
 940                    const struct gl_config * mesaVis,
 941                    __DRIcontext * driContextPriv,
 942                    unsigned major_version,
 943                    unsigned minor_version,
 944                    uint32_t flags,
 945                    unsigned *error,
 946                    void *sharedContextPrivate)
 947 {
 948    bool success = false;
 949
 950 #ifdef I915
 951    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 952    struct intel_screen *intelScreen = sPriv->driverPrivate;
 953
 954    if (IS_9XX(intelScreen->deviceID)) {
 955       success = i915CreateContext(api, mesaVis, driContextPriv,
 956                                   major_version, minor_version, error,
 957                                   sharedContextPrivate);
 958    } else {
 959       intelScreen->no_vbo = true;
 960       success = i830CreateContext(api, mesaVis, driContextPriv,
 961                                   major_version, minor_version, error,
 962                                   sharedContextPrivate);
 963    }
 964 #else
 965    success = brwCreateContext(api, mesaVis,
 966                               driContextPriv,
 967                               major_version, minor_version, flags,
 968                               error, sharedContextPrivate);
 969 #endif
 970
 971    if (success)
 972       return true;
 973
 974    if (driContextPriv->driverPrivate != NULL)
 975       intelDestroyContext(driContextPriv);
 976
 977    return false;
 978 }
 979
 980 static bool
 981 intel_init_bufmgr(struct intel_screen *intelScreen)
 982 {
 983    __DRIscreen *spriv = intelScreen->driScrnPriv;
 984
 985    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 986
 987    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 988    if (intelScreen->bufmgr == NULL) {
 989       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 990               __func__, __LINE__);
 991       return false;
 992    }
 993
 994    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 995
 996    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
 997       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
 998       return false;
 999    }
1000
1001    return true;
1002 }
1003
1004 /**
1005  * Override intel_screen.hw_has_separate_stencil with environment variable
1006  * INTEL_SEPARATE_STENCIL.
1007  *
1008  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
1009  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
1010  * is ignored.
1011  */
1012 static void
1013 intel_override_separate_stencil(struct intel_screen *screen)
1014 {
1015    const char *s = getenv("INTEL_SEPARATE_STENCIL");
1016    if (!s) {
1017       return;
1018    } else if (!strncmp("0", s, 2)) {
1019       screen->hw_has_separate_stencil = false;
1020    } else if (!strncmp("1", s, 2)) {
1021       screen->hw_has_separate_stencil = true;
1022    } else {
1023       fprintf(stderr,
1024               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
1025               "invalid value and is ignored", s);
1026    }
1027 }
1028
1029 static bool
1030 intel_detect_swizzling(struct intel_screen *screen)
1031 {
1032    drm_intel_bo *buffer;
1033    unsigned long flags = 0;
1034    unsigned long aligned_pitch;
1035    uint32_t tiling = I915_TILING_X;
1036    uint32_t swizzle_mode = 0;
1037
1038    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1039                                      64, 64, 4,
1040                                      &tiling, &aligned_pitch, flags);
1041    if (buffer == NULL)
1042       return false;
1043
1044    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1045    drm_intel_bo_unreference(buffer);
1046
1047    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1048       return false;
1049    else
1050       return true;
1051 }
1052
1053 static __DRIconfig**
1054 intel_screen_make_configs(__DRIscreen *dri_screen)
1055 {
1056    static const gl_format formats[] = {
1057       MESA_FORMAT_RGB565,
1058       MESA_FORMAT_ARGB8888
1059    };
1060
1061    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1062    static const GLenum back_buffer_modes[] = {
1063        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1064    };
1065
1066    static const uint8_t singlesample_samples[1] = {0};
1067    static const uint8_t multisample_samples[2]  = {4, 8};
1068
1069    struct intel_screen *screen = dri_screen->driverPrivate;
1070    uint8_t depth_bits[4], stencil_bits[4];
1071    __DRIconfig **configs = NULL;
1072
1073    /* Generate singlesample configs without accumulation buffer. */
1074    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1075       __DRIconfig **new_configs;
1076       int num_depth_stencil_bits = 2;
1077
1078       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1079        * buffer that has a different number of bits per pixel than the color
1080        * buffer, gen >= 6 supports this.
1081        */
1082       depth_bits[0] = 0;
1083       stencil_bits[0] = 0;
1084
1085       if (formats[i] == MESA_FORMAT_RGB565) {
1086          depth_bits[1] = 16;
1087          stencil_bits[1] = 0;
1088          if (screen->gen >= 6) {
1089              depth_bits[2] = 24;
1090              stencil_bits[2] = 8;
1091              num_depth_stencil_bits = 3;
1092          }
1093       } else {
1094          depth_bits[1] = 24;
1095          stencil_bits[1] = 8;
1096       }
1097
1098       new_configs = driCreateConfigs(formats[i],
1099                                      depth_bits,
1100                                      stencil_bits,
1101                                      num_depth_stencil_bits,
1102                                      back_buffer_modes, 2,
1103                                      singlesample_samples, 1,
1104                                      false);
1105       configs = driConcatConfigs(configs, new_configs);
1106    }
1107
1108    /* Generate the minimum possible set of configs that include an
1109     * accumulation buffer.
1110     */
1111    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1112       __DRIconfig **new_configs;
1113
1114       if (formats[i] == MESA_FORMAT_RGB565) {
1115          depth_bits[0] = 16;
1116          stencil_bits[0] = 0;
1117       } else {
1118          depth_bits[0] = 24;
1119          stencil_bits[0] = 8;
1120       }
1121
1122       new_configs = driCreateConfigs(formats[i],
1123                                      depth_bits, stencil_bits, 1,
1124                                      back_buffer_modes, 1,
1125                                      singlesample_samples, 1,
1126                                      true);
1127       configs = driConcatConfigs(configs, new_configs);
1128    }
1129
1130    /* Generate multisample configs.
1131     *
1132     * This loop breaks early, and hence is a no-op, on gen < 6.
1133     *
1134     * Multisample configs must follow the singlesample configs in order to
1135     * work around an X server bug present in 1.12. The X server chooses to
1136     * associate the first listed RGBA888-Z24S8 config, regardless of its
1137     * sample count, with the 32-bit depth visual used for compositing.
1138     *
1139     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1140     * supported.  Singlebuffer configs are not supported because no one wants
1141     * them.
1142     */
1143    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1144       if (screen->gen < 6)
1145          break;
1146
1147       __DRIconfig **new_configs;
1148       const int num_depth_stencil_bits = 2;
1149       int num_msaa_modes = 0;
1150
1151       depth_bits[0] = 0;
1152       stencil_bits[0] = 0;
1153
1154       if (formats[i] == MESA_FORMAT_RGB565) {
1155          depth_bits[1] = 16;
1156          stencil_bits[1] = 0;
1157       } else {
1158          depth_bits[1] = 24;
1159          stencil_bits[1] = 8;
1160       }
1161
1162       if (screen->gen >= 7)
1163          num_msaa_modes = 2;
1164       else if (screen->gen == 6)
1165          num_msaa_modes = 1;
1166
1167       new_configs = driCreateConfigs(formats[i],
1168                                      depth_bits,
1169                                      stencil_bits,
1170                                      num_depth_stencil_bits,
1171                                      back_buffer_modes, 1,
1172                                      multisample_samples,
1173                                      num_msaa_modes,
1174                                      false);
1175       configs = driConcatConfigs(configs, new_configs);
1176    }
1177
1178    if (configs == NULL) {
1179       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1180               __LINE__);
1181       return NULL;
1182    }
1183
1184    return configs;
1185 }
1186
1187 static void
1188 set_max_gl_versions(struct intel_screen *screen)
1189 {
1190    int gl_version_override = _mesa_get_gl_version_override();
1191
1192    switch (screen->gen) {
1193    case 7:
1194       screen->max_gl_core_version = 31;
1195       screen->max_gl_compat_version = 30;
1196       screen->max_gl_es1_version = 11;
1197       screen->max_gl_es2_version = 30;
1198       break;
1199    case 6:
1200       screen->max_gl_core_version = 31;
1201       screen->max_gl_compat_version = 30;
1202       screen->max_gl_es1_version = 11;
1203       screen->max_gl_es2_version = 30;
1204       break;
1205    case 5:
1206    case 4:
1207       screen->max_gl_core_version = 0;
1208       screen->max_gl_compat_version = 21;
1209       screen->max_gl_es1_version = 11;
1210       screen->max_gl_es2_version = 20;
1211       break;
1212    case 3: {
1213       screen->max_gl_core_version = 0;
1214       screen->max_gl_es1_version = 11;
1215       screen->max_gl_compat_version = 21;
1216       screen->max_gl_es2_version = 20;
1217
1218       break;
1219    }
1220    case 2:
1221       screen->max_gl_core_version = 0;
1222       screen->max_gl_compat_version = 13;
1223       screen->max_gl_es1_version = 11;
1224       screen->max_gl_es2_version = 0;
1225       break;
1226    default:
1227       assert(!"unrecognized intel_screen::gen");
1228       break;
1229    }
1230
1231    if (gl_version_override >= 31) {
1232       screen->max_gl_core_version = MAX2(screen->max_gl_core_version,
1233                                          gl_version_override);
1234    } else {
1235       screen->max_gl_compat_version = MAX2(screen->max_gl_compat_version,
1236                                            gl_version_override);
1237    }
1238
1239 #ifndef FEATURE_ES1
1240    screen->max_gl_es1_version = 0;
1241 #endif
1242
1243 #ifndef FEATURE_ES2
1244    screen->max_gl_es2_version = 0;
1245 #endif
1246 }
1247
1248 /**
1249  * This is the driver specific part of the createNewScreen entry point.
1250  * Called when using DRI2.
1251  *
1252  * \return the struct gl_config supported by this driver
1253  */
1254 static const
1255 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1256 {
1257    struct intel_screen *intelScreen;
1258
1259    if (psp->dri2.loader->base.version <= 2 ||
1260        psp->dri2.loader->getBuffersWithFormat == NULL) {
1261       fprintf(stderr,
1262               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1263               "support required\n");
1264       return false;
1265    }
1266
1267    /* Allocate the private area */
1268    intelScreen = calloc(1, sizeof *intelScreen);
1269    if (!intelScreen) {
1270       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1271       return false;
1272    }
1273    /* parse information in __driConfigOptions */
1274    driParseOptionInfo(&intelScreen->optionCache,
1275                       __driConfigOptions, __driNConfigOptions);
1276
1277    intelScreen->driScrnPriv = psp;
1278    psp->driverPrivate = (void *) intelScreen;
1279
1280    if (!intel_init_bufmgr(intelScreen))
1281        return false;
1282
1283    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1284
1285    if (IS_GEN7(intelScreen->deviceID)) {
1286       intelScreen->gen = 7;
1287    } else if (IS_GEN6(intelScreen->deviceID)) {
1288       intelScreen->gen = 6;
1289    } else if (IS_GEN5(intelScreen->deviceID)) {
1290       intelScreen->gen = 5;
1291    } else if (IS_965(intelScreen->deviceID)) {
1292       intelScreen->gen = 4;
1293    } else if (IS_9XX(intelScreen->deviceID)) {
1294       intelScreen->gen = 3;
1295    } else {
1296       intelScreen->gen = 2;
1297    }
1298
1299    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1300    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1301
1302    int has_llc = 0;
1303    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1304                                   &has_llc);
1305    if (success && has_llc)
1306       intelScreen->hw_has_llc = true;
1307    else if (!success && intelScreen->gen >= 6)
1308       intelScreen->hw_has_llc = true;
1309
1310    intel_override_separate_stencil(intelScreen);
1311
1312    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1313
1314    set_max_gl_versions(intelScreen);
1315
1316    psp->api_mask = (1 << __DRI_API_OPENGL);
1317    if (intelScreen->max_gl_core_version > 0)
1318       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
1319    if (intelScreen->max_gl_es1_version > 0)
1320       psp->api_mask |= (1 << __DRI_API_GLES);
1321    if (intelScreen->max_gl_es2_version > 0)
1322       psp->api_mask |= (1 << __DRI_API_GLES2);
1323    if (intelScreen->max_gl_es2_version >= 30)
1324       psp->api_mask |= (1 << __DRI_API_GLES3);
1325
1326    psp->extensions = intelScreenExtensions;
1327
1328    return (const __DRIconfig**) intel_screen_make_configs(psp);
1329 }
1330
1331 struct intel_buffer {
1332    __DRIbuffer base;
1333    struct intel_region *region;
1334 };
1335
1336 static __DRIbuffer *
1337 intelAllocateBuffer(__DRIscreen *screen,
1338                     unsigned attachment, unsigned format,
1339                     int width, int height)
1340 {
1341    struct intel_buffer *intelBuffer;
1342    struct intel_screen *intelScreen = screen->driverPrivate;
1343
1344    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1345           attachment == __DRI_BUFFER_BACK_LEFT);
1346
1347    intelBuffer = calloc(1, sizeof *intelBuffer);
1348    if (intelBuffer == NULL)
1349       return NULL;
1350
1351    /* The front and back buffers are color buffers, which are X tiled. */
1352    intelBuffer->region = intel_region_alloc(intelScreen,
1353                                             I915_TILING_X,
1354                                             format / 8,
1355                                             width,
1356                                             height,
1357                                             true);
1358
1359    if (intelBuffer->region == NULL) {
1360            free(intelBuffer);
1361            return NULL;
1362    }
1363
1364    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1365
1366    intelBuffer->base.attachment = attachment;
1367    intelBuffer->base.cpp = intelBuffer->region->cpp;
1368    intelBuffer->base.pitch = intelBuffer->region->pitch;
1369
1370    return &intelBuffer->base;
1371 }
1372
1373 static void
1374 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1375 {
1376    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1377
1378    intel_region_release(&intelBuffer->region);
1379    free(intelBuffer);
1380 }
1381
1382
1383 const struct __DriverAPIRec driDriverAPI = {
1384    .InitScreen           = intelInitScreen2,
1385    .DestroyScreen        = intelDestroyScreen,
1386    .CreateContext        = intelCreateContext,
1387    .DestroyContext       = intelDestroyContext,
1388    .CreateBuffer         = intelCreateBuffer,
1389    .DestroyBuffer        = intelDestroyBuffer,
1390    .MakeCurrent          = intelMakeCurrent,
1391    .UnbindContext        = intelUnbindContext,
1392    .AllocateBuffer       = intelAllocateBuffer,
1393    .ReleaseBuffer        = intelReleaseBuffer
1394 };
1395
1396 /* This is the table of extensions that the loader will dlsym() for. */
1397 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1398     &driCoreExtension.base,
1399     &driDRI2Extension.base,
1400     NULL
1401 };