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(disable_derivative_optimization, "false")
  62          DRI_CONF_DESC(en, "Derivatives with finer granularity by default")
  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_SECTION_END
  69    DRI_CONF_SECTION_DEBUG
  70       DRI_CONF_NO_RAST("false")
  71       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  72       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  73       DRI_CONF_DISABLE_THROTTLING("false")
  74       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  75       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  76       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  77
  78       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  79          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  80       DRI_CONF_OPT_END
  81    DRI_CONF_SECTION_END
  82 DRI_CONF_END;
  83
  84 #include "intel_batchbuffer.h"
  85 #include "intel_buffers.h"
  86 #include "intel_bufmgr.h"
  87 #include "intel_chipset.h"
  88 #include "intel_fbo.h"
  89 #include "intel_mipmap_tree.h"
  90 #include "intel_screen.h"
  91 #include "intel_tex.h"
  92 #include "intel_regions.h"
  93
  94 #include "brw_context.h"
  95
  96 #include "i915_drm.h"
  97
  98 #ifdef USE_NEW_INTERFACE
  99 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 100 #endif /*USE_NEW_INTERFACE */
 101
 102 /**
 103  * For debugging purposes, this returns a time in seconds.
 104  */
 105 double
 106 get_time(void)
 107 {
 108    struct timespec tp;
 109
 110    clock_gettime(CLOCK_MONOTONIC, &tp);
 111
 112    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 113 }
 114
 115 void
 116 aub_dump_bmp(struct gl_context *ctx)
 117 {
 118    struct gl_framebuffer *fb = ctx->DrawBuffer;
 119
 120    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 121       struct intel_renderbuffer *irb =
 122          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 123
 124       if (irb && irb->mt) {
 125          enum aub_dump_bmp_format format;
 126
 127          switch (irb->Base.Base.Format) {
 128          case MESA_FORMAT_ARGB8888:
 129          case MESA_FORMAT_XRGB8888:
 130             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 131             break;
 132          default:
 133             continue;
 134          }
 135
 136          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 137          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 138                                        irb->draw_x,
 139                                        irb->draw_y,
 140                                        irb->Base.Base.Width,
 141                                        irb->Base.Base.Height,
 142                                        format,
 143                                        irb->mt->region->pitch,
 144                                        0);
 145       }
 146    }
 147 }
 148
 149 static const __DRItexBufferExtension intelTexBufferExtension = {
 150    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 151
 152    .setTexBuffer        = intelSetTexBuffer,
 153    .setTexBuffer2       = intelSetTexBuffer2,
 154    .releaseTexBuffer    = NULL,
 155 };
 156
 157 static void
 158 intel_dri2_flush_with_flags(__DRIcontext *cPriv,
 159                             __DRIdrawable *dPriv,
 160                             unsigned flags,
 161                             enum __DRI2throttleReason reason)
 162 {
 163    struct brw_context *brw = cPriv->driverPrivate;
 164
 165    if (!brw)
 166       return;
 167
 168    struct gl_context *ctx = &brw->ctx;
 169
 170    FLUSH_VERTICES(ctx, 0);
 171
 172    if (flags & __DRI2_FLUSH_DRAWABLE)
 173       intel_resolve_for_dri2_flush(brw, dPriv);
 174
 175    if (reason == __DRI2_THROTTLE_SWAPBUFFER ||
 176        reason == __DRI2_THROTTLE_FLUSHFRONT) {
 177       brw->need_throttle = true;
 178    }
 179
 180    intel_batchbuffer_flush(brw);
 181
 182    if (INTEL_DEBUG & DEBUG_AUB) {
 183       aub_dump_bmp(ctx);
 184    }
 185 }
 186
 187 /**
 188  * Provides compatibility with loaders that only support the older (version
 189  * 1-3) flush interface.
 190  *
 191  * That includes libGL up to Mesa 9.0, and the X Server at least up to 1.13.
 192  */
 193 static void
 194 intel_dri2_flush(__DRIdrawable *drawable)
 195 {
 196    intel_dri2_flush_with_flags(drawable->driContextPriv, drawable,
 197                                __DRI2_FLUSH_DRAWABLE,
 198                                __DRI2_THROTTLE_SWAPBUFFER);
 199 }
 200
 201 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 202     .base = { __DRI2_FLUSH, 4 },
 203
 204     .flush              = intel_dri2_flush,
 205     .invalidate         = dri2InvalidateDrawable,
 206     .flush_with_flags   = intel_dri2_flush_with_flags,
 207 };
 208
 209 static struct intel_image_format intel_image_formats[] = {
 210    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 211      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 212
 213    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 214      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 215
 216    { __DRI_IMAGE_FOURCC_RGB565, __DRI_IMAGE_COMPONENTS_RGB, 1,
 217      { { 0, 0, 0, __DRI_IMAGE_FORMAT_RGB565, 2 } } },
 218
 219    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 220      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 221        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 222        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 223
 224    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 225      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 226        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 227        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 228
 229    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 230      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 231        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 232        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 233
 234    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 235      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 236        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 237        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 238
 239    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 240      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 241        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 242        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 243
 244    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 245      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 246        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 247
 248    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 249      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 250        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 251
 252    /* For YUYV buffers, we set up two overlapping DRI images and treat
 253     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 254     * samples YU or YV pairs and places Y into the R component, while
 255     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 256     * places U into the G component and V into A.  This lets the
 257     * texture sampler interpolate the Y components correctly when
 258     * sampling from plane 0, and interpolate U and V correctly when
 259     * sampling from plane 1. */
 260    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 261      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 262        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 263 };
 264
 265 static struct intel_image_format *
 266 intel_image_format_lookup(int fourcc)
 267 {
 268    struct intel_image_format *f = NULL;
 269
 270    for (unsigned i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 271       if (intel_image_formats[i].fourcc == fourcc) {
 272          f = &intel_image_formats[i];
 273          break;
 274       }
 275    }
 276
 277    return f;
 278 }
 279
 280 static __DRIimage *
 281 intel_allocate_image(int dri_format, void *loaderPrivate)
 282 {
 283     __DRIimage *image;
 284
 285     image = calloc(1, sizeof *image);
 286     if (image == NULL)
 287         return NULL;
 288
 289     image->dri_format = dri_format;
 290     image->offset = 0;
 291
 292     switch (dri_format) {
 293     case __DRI_IMAGE_FORMAT_RGB565:
 294        image->format = MESA_FORMAT_RGB565;
 295        break;
 296     case __DRI_IMAGE_FORMAT_XRGB8888:
 297        image->format = MESA_FORMAT_XRGB8888;
 298        break;
 299     case __DRI_IMAGE_FORMAT_ARGB8888:
 300        image->format = MESA_FORMAT_ARGB8888;
 301        break;
 302     case __DRI_IMAGE_FORMAT_ABGR8888:
 303        image->format = MESA_FORMAT_RGBA8888_REV;
 304        break;
 305     case __DRI_IMAGE_FORMAT_XBGR8888:
 306        image->format = MESA_FORMAT_RGBX8888_REV;
 307        break;
 308     case __DRI_IMAGE_FORMAT_R8:
 309        image->format = MESA_FORMAT_R8;
 310        break;
 311     case __DRI_IMAGE_FORMAT_GR88:
 312        image->format = MESA_FORMAT_GR88;
 313        break;
 314     case __DRI_IMAGE_FORMAT_NONE:
 315        image->format = MESA_FORMAT_NONE;
 316        break;
 317     default:
 318        free(image);
 319        return NULL;
 320     }
 321
 322     image->internal_format = _mesa_get_format_base_format(image->format);
 323     image->data = loaderPrivate;
 324
 325     return image;
 326 }
 327
 328 /**
 329  * Sets up a DRIImage structure to point to our shared image in a region
 330  */
 331 static void
 332 intel_setup_image_from_mipmap_tree(struct brw_context *brw, __DRIimage *image,
 333                                    struct intel_mipmap_tree *mt, GLuint level,
 334                                    GLuint zoffset)
 335 {
 336    unsigned int draw_x, draw_y;
 337    uint32_t mask_x, mask_y;
 338
 339    intel_miptree_make_shareable(brw, mt);
 340
 341    intel_miptree_check_level_layer(mt, level, zoffset);
 342
 343    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 344    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 345
 346    image->width = mt->level[level].width;
 347    image->height = mt->level[level].height;
 348    image->tile_x = draw_x & mask_x;
 349    image->tile_y = draw_y & mask_y;
 350
 351    image->offset = intel_region_get_aligned_offset(mt->region,
 352                                                    draw_x & ~mask_x,
 353                                                    draw_y & ~mask_y,
 354                                                    false);
 355
 356    intel_region_reference(&image->region, mt->region);
 357 }
 358
 359 static void
 360 intel_setup_image_from_dimensions(__DRIimage *image)
 361 {
 362    image->width    = image->region->width;
 363    image->height   = image->region->height;
 364    image->tile_x = 0;
 365    image->tile_y = 0;
 366    image->has_depthstencil = false;
 367 }
 368
 369 static inline uint32_t
 370 intel_dri_format(GLuint format)
 371 {
 372    switch (format) {
 373    case MESA_FORMAT_RGB565:
 374       return __DRI_IMAGE_FORMAT_RGB565;
 375    case MESA_FORMAT_XRGB8888:
 376       return __DRI_IMAGE_FORMAT_XRGB8888;
 377    case MESA_FORMAT_ARGB8888:
 378       return __DRI_IMAGE_FORMAT_ARGB8888;
 379    case MESA_FORMAT_RGBA8888_REV:
 380       return __DRI_IMAGE_FORMAT_ABGR8888;
 381    case MESA_FORMAT_R8:
 382       return __DRI_IMAGE_FORMAT_R8;
 383    case MESA_FORMAT_RG88:
 384       return __DRI_IMAGE_FORMAT_GR88;
 385    }
 386
 387    return MESA_FORMAT_NONE;
 388 }
 389
 390 static __DRIimage *
 391 intel_create_image_from_name(__DRIscreen *screen,
 392                              int width, int height, int format,
 393                              int name, int pitch, void *loaderPrivate)
 394 {
 395     struct intel_screen *intelScreen = screen->driverPrivate;
 396     __DRIimage *image;
 397     int cpp;
 398
 399     image = intel_allocate_image(format, loaderPrivate);
 400     if (image == NULL)
 401        return NULL;
 402
 403     if (image->format == MESA_FORMAT_NONE)
 404        cpp = 1;
 405     else
 406        cpp = _mesa_get_format_bytes(image->format);
 407     image->region = intel_region_alloc_for_handle(intelScreen,
 408                                                   cpp, width, height,
 409                                                   pitch * cpp, name, "image");
 410     if (image->region == NULL) {
 411        free(image);
 412        return NULL;
 413     }
 414
 415     intel_setup_image_from_dimensions(image);
 416
 417     return image;
 418 }
 419
 420 static __DRIimage *
 421 intel_create_image_from_renderbuffer(__DRIcontext *context,
 422                                      int renderbuffer, void *loaderPrivate)
 423 {
 424    __DRIimage *image;
 425    struct brw_context *brw = context->driverPrivate;
 426    struct gl_context *ctx = &brw->ctx;
 427    struct gl_renderbuffer *rb;
 428    struct intel_renderbuffer *irb;
 429
 430    rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 431    if (!rb) {
 432       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 433       return NULL;
 434    }
 435
 436    irb = intel_renderbuffer(rb);
 437    intel_miptree_make_shareable(brw, irb->mt);
 438    image = calloc(1, sizeof *image);
 439    if (image == NULL)
 440       return NULL;
 441
 442    image->internal_format = rb->InternalFormat;
 443    image->format = rb->Format;
 444    image->offset = 0;
 445    image->data = loaderPrivate;
 446    intel_region_reference(&image->region, irb->mt->region);
 447    intel_setup_image_from_dimensions(image);
 448    image->dri_format = intel_dri_format(image->format);
 449    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 450
 451    rb->NeedsFinishRenderTexture = true;
 452    return image;
 453 }
 454
 455 static __DRIimage *
 456 intel_create_image_from_texture(__DRIcontext *context, int target,
 457                                 unsigned texture, int zoffset,
 458                                 int level,
 459                                 unsigned *error,
 460                                 void *loaderPrivate)
 461 {
 462    __DRIimage *image;
 463    struct brw_context *brw = context->driverPrivate;
 464    struct gl_texture_object *obj;
 465    struct intel_texture_object *iobj;
 466    GLuint face = 0;
 467
 468    obj = _mesa_lookup_texture(&brw->ctx, texture);
 469    if (!obj || obj->Target != target) {
 470       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 471       return NULL;
 472    }
 473
 474    if (target == GL_TEXTURE_CUBE_MAP)
 475       face = zoffset;
 476
 477    _mesa_test_texobj_completeness(&brw->ctx, obj);
 478    iobj = intel_texture_object(obj);
 479    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 480       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 481       return NULL;
 482    }
 483
 484    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 485       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 486       return NULL;
 487    }
 488
 489    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 490       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 491       return NULL;
 492    }
 493    image = calloc(1, sizeof *image);
 494    if (image == NULL) {
 495       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 496       return NULL;
 497    }
 498
 499    image->internal_format = obj->Image[face][level]->InternalFormat;
 500    image->format = obj->Image[face][level]->TexFormat;
 501    image->data = loaderPrivate;
 502    intel_setup_image_from_mipmap_tree(brw, image, iobj->mt, level, zoffset);
 503    image->dri_format = intel_dri_format(image->format);
 504    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 505    if (image->dri_format == MESA_FORMAT_NONE) {
 506       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 507       free(image);
 508       return NULL;
 509    }
 510
 511    *error = __DRI_IMAGE_ERROR_SUCCESS;
 512    return image;
 513 }
 514
 515 static void
 516 intel_destroy_image(__DRIimage *image)
 517 {
 518     intel_region_release(&image->region);
 519     free(image);
 520 }
 521
 522 static __DRIimage *
 523 intel_create_image(__DRIscreen *screen,
 524                    int width, int height, int format,
 525                    unsigned int use,
 526                    void *loaderPrivate)
 527 {
 528    __DRIimage *image;
 529    struct intel_screen *intelScreen = screen->driverPrivate;
 530    uint32_t tiling;
 531    int cpp;
 532
 533    tiling = I915_TILING_X;
 534    if (use & __DRI_IMAGE_USE_CURSOR) {
 535       if (width != 64 || height != 64)
 536          return NULL;
 537       tiling = I915_TILING_NONE;
 538    }
 539
 540    if (use & __DRI_IMAGE_USE_LINEAR)
 541       tiling = I915_TILING_NONE;
 542
 543    image = intel_allocate_image(format, loaderPrivate);
 544    if (image == NULL)
 545       return NULL;
 546
 547    cpp = _mesa_get_format_bytes(image->format);
 548    image->region =
 549       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 550    if (image->region == NULL) {
 551       free(image);
 552       return NULL;
 553    }
 554
 555    intel_setup_image_from_dimensions(image);
 556
 557    return image;
 558 }
 559
 560 static GLboolean
 561 intel_query_image(__DRIimage *image, int attrib, int *value)
 562 {
 563    switch (attrib) {
 564    case __DRI_IMAGE_ATTRIB_STRIDE:
 565       *value = image->region->pitch;
 566       return true;
 567    case __DRI_IMAGE_ATTRIB_HANDLE:
 568       *value = image->region->bo->handle;
 569       return true;
 570    case __DRI_IMAGE_ATTRIB_NAME:
 571       return intel_region_flink(image->region, (uint32_t *) value);
 572    case __DRI_IMAGE_ATTRIB_FORMAT:
 573       *value = image->dri_format;
 574       return true;
 575    case __DRI_IMAGE_ATTRIB_WIDTH:
 576       *value = image->region->width;
 577       return true;
 578    case __DRI_IMAGE_ATTRIB_HEIGHT:
 579       *value = image->region->height;
 580       return true;
 581    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 582       if (image->planar_format == NULL)
 583          return false;
 584       *value = image->planar_format->components;
 585       return true;
 586    case __DRI_IMAGE_ATTRIB_FD:
 587       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 588          return true;
 589       return false;
 590   default:
 591       return false;
 592    }
 593 }
 594
 595 static __DRIimage *
 596 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 597 {
 598    __DRIimage *image;
 599
 600    image = calloc(1, sizeof *image);
 601    if (image == NULL)
 602       return NULL;
 603
 604    intel_region_reference(&image->region, orig_image->region);
 605    if (image->region == NULL) {
 606       free(image);
 607       return NULL;
 608    }
 609
 610    image->internal_format = orig_image->internal_format;
 611    image->planar_format   = orig_image->planar_format;
 612    image->dri_format      = orig_image->dri_format;
 613    image->format          = orig_image->format;
 614    image->offset          = orig_image->offset;
 615    image->width           = orig_image->width;
 616    image->height          = orig_image->height;
 617    image->tile_x          = orig_image->tile_x;
 618    image->tile_y          = orig_image->tile_y;
 619    image->has_depthstencil = orig_image->has_depthstencil;
 620    image->data            = loaderPrivate;
 621
 622    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 623    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 624
 625    return image;
 626 }
 627
 628 static GLboolean
 629 intel_validate_usage(__DRIimage *image, unsigned int use)
 630 {
 631    if (use & __DRI_IMAGE_USE_CURSOR) {
 632       if (image->region->width != 64 || image->region->height != 64)
 633          return GL_FALSE;
 634    }
 635
 636    return GL_TRUE;
 637 }
 638
 639 static __DRIimage *
 640 intel_create_image_from_names(__DRIscreen *screen,
 641                               int width, int height, int fourcc,
 642                               int *names, int num_names,
 643                               int *strides, int *offsets,
 644                               void *loaderPrivate)
 645 {
 646     struct intel_image_format *f = NULL;
 647     __DRIimage *image;
 648     int i, index;
 649
 650     if (screen == NULL || names == NULL || num_names != 1)
 651         return NULL;
 652
 653     f = intel_image_format_lookup(fourcc);
 654     if (f == NULL)
 655         return NULL;
 656
 657     image = intel_create_image_from_name(screen, width, height,
 658                                          __DRI_IMAGE_FORMAT_NONE,
 659                                          names[0], strides[0],
 660                                          loaderPrivate);
 661
 662    if (image == NULL)
 663       return NULL;
 664
 665     image->planar_format = f;
 666     for (i = 0; i < f->nplanes; i++) {
 667         index = f->planes[i].buffer_index;
 668         image->offsets[index] = offsets[index];
 669         image->strides[index] = strides[index];
 670     }
 671
 672     return image;
 673 }
 674
 675 static __DRIimage *
 676 intel_create_image_from_fds(__DRIscreen *screen,
 677                             int width, int height, int fourcc,
 678                             int *fds, int num_fds, int *strides, int *offsets,
 679                             void *loaderPrivate)
 680 {
 681    struct intel_screen *intelScreen = screen->driverPrivate;
 682    struct intel_image_format *f;
 683    __DRIimage *image;
 684    int i, index;
 685
 686    if (fds == NULL || num_fds != 1)
 687       return NULL;
 688
 689    f = intel_image_format_lookup(fourcc);
 690    if (f == NULL)
 691       return NULL;
 692
 693    if (f->nplanes == 1)
 694       image = intel_allocate_image(f->planes[0].dri_format, loaderPrivate);
 695    else
 696       image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 697
 698    if (image == NULL)
 699       return NULL;
 700
 701    image->region = intel_region_alloc_for_fd(intelScreen,
 702                                              1, width, height,
 703                                              strides[0], fds[0], "image");
 704    if (image->region == NULL) {
 705       free(image);
 706       return NULL;
 707    }
 708
 709    image->planar_format = f;
 710    for (i = 0; i < f->nplanes; i++) {
 711       index = f->planes[i].buffer_index;
 712       image->offsets[index] = offsets[index];
 713       image->strides[index] = strides[index];
 714    }
 715
 716    intel_setup_image_from_dimensions(image);
 717
 718    return image;
 719 }
 720
 721 static __DRIimage *
 722 intel_create_image_from_dma_bufs(__DRIscreen *screen,
 723                                  int width, int height, int fourcc,
 724                                  int *fds, int num_fds,
 725                                  int *strides, int *offsets,
 726                                  enum __DRIYUVColorSpace yuv_color_space,
 727                                  enum __DRISampleRange sample_range,
 728                                  enum __DRIChromaSiting horizontal_siting,
 729                                  enum __DRIChromaSiting vertical_siting,
 730                                  unsigned *error,
 731                                  void *loaderPrivate)
 732 {
 733    __DRIimage *image;
 734    struct intel_image_format *f = intel_image_format_lookup(fourcc);
 735
 736    /* For now only packed formats that have native sampling are supported. */
 737    if (!f || f->nplanes != 1) {
 738       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 739       return NULL;
 740    }
 741
 742    image = intel_create_image_from_fds(screen, width, height, fourcc, fds,
 743                                        num_fds, strides, offsets,
 744                                        loaderPrivate);
 745
 746    /*
 747     * Invalid parameters and any inconsistencies between are assumed to be
 748     * checked by the caller. Therefore besides unsupported formats one can fail
 749     * only in allocation.
 750     */
 751    if (!image) {
 752       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 753       return NULL;
 754    }
 755
 756    image->dma_buf_imported = true;
 757    image->yuv_color_space = yuv_color_space;
 758    image->sample_range = sample_range;
 759    image->horizontal_siting = horizontal_siting;
 760    image->vertical_siting = vertical_siting;
 761
 762    *error = __DRI_IMAGE_ERROR_SUCCESS;
 763    return image;
 764 }
 765
 766 static __DRIimage *
 767 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 768 {
 769     int width, height, offset, stride, dri_format, index;
 770     struct intel_image_format *f;
 771     uint32_t mask_x, mask_y;
 772     __DRIimage *image;
 773
 774     if (parent == NULL || parent->planar_format == NULL)
 775         return NULL;
 776
 777     f = parent->planar_format;
 778
 779     if (plane >= f->nplanes)
 780         return NULL;
 781
 782     width = parent->region->width >> f->planes[plane].width_shift;
 783     height = parent->region->height >> f->planes[plane].height_shift;
 784     dri_format = f->planes[plane].dri_format;
 785     index = f->planes[plane].buffer_index;
 786     offset = parent->offsets[index];
 787     stride = parent->strides[index];
 788
 789     image = intel_allocate_image(dri_format, loaderPrivate);
 790     if (image == NULL)
 791        return NULL;
 792
 793     if (offset + height * stride > parent->region->bo->size) {
 794        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 795        free(image);
 796        return NULL;
 797     }
 798
 799     image->region = calloc(sizeof(*image->region), 1);
 800     if (image->region == NULL) {
 801        free(image);
 802        return NULL;
 803     }
 804
 805     image->region->cpp = _mesa_get_format_bytes(image->format);
 806     image->region->width = width;
 807     image->region->height = height;
 808     image->region->pitch = stride;
 809     image->region->refcount = 1;
 810     image->region->bo = parent->region->bo;
 811     drm_intel_bo_reference(image->region->bo);
 812     image->region->tiling = parent->region->tiling;
 813     image->offset = offset;
 814     intel_setup_image_from_dimensions(image);
 815
 816     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 817     if (offset & mask_x)
 818        _mesa_warning(NULL,
 819                      "intel_create_sub_image: offset not on tile boundary");
 820
 821     return image;
 822 }
 823
 824 static struct __DRIimageExtensionRec intelImageExtension = {
 825     .base = { __DRI_IMAGE, 8 },
 826
 827     .createImageFromName                = intel_create_image_from_name,
 828     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 829     .destroyImage                       = intel_destroy_image,
 830     .createImage                        = intel_create_image,
 831     .queryImage                         = intel_query_image,
 832     .dupImage                           = intel_dup_image,
 833     .validateUsage                      = intel_validate_usage,
 834     .createImageFromNames               = intel_create_image_from_names,
 835     .fromPlanar                         = intel_from_planar,
 836     .createImageFromTexture             = intel_create_image_from_texture,
 837     .createImageFromFds                 = intel_create_image_from_fds,
 838     .createImageFromDmaBufs             = intel_create_image_from_dma_bufs
 839 };
 840
 841 static const __DRIextension *intelScreenExtensions[] = {
 842     &intelTexBufferExtension.base,
 843     &intelFlushExtension.base,
 844     &intelImageExtension.base,
 845     &dri2ConfigQueryExtension.base,
 846     NULL
 847 };
 848
 849 static bool
 850 intel_get_param(__DRIscreen *psp, int param, int *value)
 851 {
 852    int ret;
 853    struct drm_i915_getparam gp;
 854
 855    memset(&gp, 0, sizeof(gp));
 856    gp.param = param;
 857    gp.value = value;
 858
 859    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 860    if (ret) {
 861       if (ret != -EINVAL)
 862          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 863       return false;
 864    }
 865
 866    return true;
 867 }
 868
 869 static bool
 870 intel_get_boolean(__DRIscreen *psp, int param)
 871 {
 872    int value = 0;
 873    return intel_get_param(psp, param, &value) && value;
 874 }
 875
 876 static void
 877 intelDestroyScreen(__DRIscreen * sPriv)
 878 {
 879    struct intel_screen *intelScreen = sPriv->driverPrivate;
 880
 881    dri_bufmgr_destroy(intelScreen->bufmgr);
 882    driDestroyOptionInfo(&intelScreen->optionCache);
 883
 884    free(intelScreen);
 885    sPriv->driverPrivate = NULL;
 886 }
 887
 888
 889 /**
 890  * This is called when we need to set up GL rendering to a new X window.
 891  */
 892 static GLboolean
 893 intelCreateBuffer(__DRIscreen * driScrnPriv,
 894                   __DRIdrawable * driDrawPriv,
 895                   const struct gl_config * mesaVis, GLboolean isPixmap)
 896 {
 897    struct intel_renderbuffer *rb;
 898    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 899    gl_format rgbFormat;
 900    unsigned num_samples = intel_quantize_num_samples(screen, mesaVis->samples);
 901    struct gl_framebuffer *fb;
 902
 903    if (isPixmap)
 904       return false;
 905
 906    fb = CALLOC_STRUCT(gl_framebuffer);
 907    if (!fb)
 908       return false;
 909
 910    _mesa_initialize_window_framebuffer(fb, mesaVis);
 911
 912    if (mesaVis->redBits == 5)
 913       rgbFormat = MESA_FORMAT_RGB565;
 914    else if (mesaVis->sRGBCapable)
 915       rgbFormat = MESA_FORMAT_SARGB8;
 916    else if (mesaVis->alphaBits == 0)
 917       rgbFormat = MESA_FORMAT_XRGB8888;
 918    else {
 919       rgbFormat = MESA_FORMAT_SARGB8;
 920       fb->Visual.sRGBCapable = true;
 921    }
 922
 923    /* setup the hardware-based renderbuffers */
 924    rb = intel_create_renderbuffer(rgbFormat, num_samples);
 925    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 926
 927    if (mesaVis->doubleBufferMode) {
 928       rb = intel_create_renderbuffer(rgbFormat, num_samples);
 929       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 930    }
 931
 932    /*
 933     * Assert here that the gl_config has an expected depth/stencil bit
 934     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 935     * which constructs the advertised configs.)
 936     */
 937    if (mesaVis->depthBits == 24) {
 938       assert(mesaVis->stencilBits == 8);
 939
 940       if (screen->devinfo->has_hiz_and_separate_stencil) {
 941          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24,
 942                                                 num_samples);
 943          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 944          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8,
 945                                                 num_samples);
 946          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 947       } else {
 948          /*
 949           * Use combined depth/stencil. Note that the renderbuffer is
 950           * attached to two attachment points.
 951           */
 952          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24,
 953                                                 num_samples);
 954          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 955          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 956       }
 957    }
 958    else if (mesaVis->depthBits == 16) {
 959       assert(mesaVis->stencilBits == 0);
 960       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16,
 961                                              num_samples);
 962       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 963    }
 964    else {
 965       assert(mesaVis->depthBits == 0);
 966       assert(mesaVis->stencilBits == 0);
 967    }
 968
 969    /* now add any/all software-based renderbuffers we may need */
 970    _swrast_add_soft_renderbuffers(fb,
 971                                   false, /* never sw color */
 972                                   false, /* never sw depth */
 973                                   false, /* never sw stencil */
 974                                   mesaVis->accumRedBits > 0,
 975                                   false, /* never sw alpha */
 976                                   false  /* never sw aux */ );
 977    driDrawPriv->driverPrivate = fb;
 978
 979    return true;
 980 }
 981
 982 static void
 983 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 984 {
 985     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 986
 987     _mesa_reference_framebuffer(&fb, NULL);
 988 }
 989
 990 static bool
 991 intel_init_bufmgr(struct intel_screen *intelScreen)
 992 {
 993    __DRIscreen *spriv = intelScreen->driScrnPriv;
 994
 995    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 996
 997    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 998    if (intelScreen->bufmgr == NULL) {
 999       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
1000               __func__, __LINE__);
1001       return false;
1002    }
1003
1004    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
1005
1006    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
1007       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
1008       return false;
1009    }
1010
1011    return true;
1012 }
1013
1014 static bool
1015 intel_detect_swizzling(struct intel_screen *screen)
1016 {
1017    drm_intel_bo *buffer;
1018    unsigned long flags = 0;
1019    unsigned long aligned_pitch;
1020    uint32_t tiling = I915_TILING_X;
1021    uint32_t swizzle_mode = 0;
1022
1023    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1024                                      64, 64, 4,
1025                                      &tiling, &aligned_pitch, flags);
1026    if (buffer == NULL)
1027       return false;
1028
1029    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1030    drm_intel_bo_unreference(buffer);
1031
1032    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1033       return false;
1034    else
1035       return true;
1036 }
1037
1038 static __DRIconfig**
1039 intel_screen_make_configs(__DRIscreen *dri_screen)
1040 {
1041    static const gl_format formats[] = {
1042       MESA_FORMAT_RGB565,
1043       MESA_FORMAT_ARGB8888
1044    };
1045
1046    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1047    static const GLenum back_buffer_modes[] = {
1048        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1049    };
1050
1051    static const uint8_t singlesample_samples[1] = {0};
1052    static const uint8_t multisample_samples[2]  = {4, 8};
1053
1054    struct intel_screen *screen = dri_screen->driverPrivate;
1055    const struct brw_device_info *devinfo = screen->devinfo;
1056    uint8_t depth_bits[4], stencil_bits[4];
1057    __DRIconfig **configs = NULL;
1058
1059    /* Generate singlesample configs without accumulation buffer. */
1060    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1061       __DRIconfig **new_configs;
1062       int num_depth_stencil_bits = 2;
1063
1064       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1065        * buffer that has a different number of bits per pixel than the color
1066        * buffer, gen >= 6 supports this.
1067        */
1068       depth_bits[0] = 0;
1069       stencil_bits[0] = 0;
1070
1071       if (formats[i] == MESA_FORMAT_RGB565) {
1072          depth_bits[1] = 16;
1073          stencil_bits[1] = 0;
1074          if (devinfo->gen >= 6) {
1075              depth_bits[2] = 24;
1076              stencil_bits[2] = 8;
1077              num_depth_stencil_bits = 3;
1078          }
1079       } else {
1080          depth_bits[1] = 24;
1081          stencil_bits[1] = 8;
1082       }
1083
1084       new_configs = driCreateConfigs(formats[i],
1085                                      depth_bits,
1086                                      stencil_bits,
1087                                      num_depth_stencil_bits,
1088                                      back_buffer_modes, 2,
1089                                      singlesample_samples, 1,
1090                                      false);
1091       configs = driConcatConfigs(configs, new_configs);
1092    }
1093
1094    /* Generate the minimum possible set of configs that include an
1095     * accumulation buffer.
1096     */
1097    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1098       __DRIconfig **new_configs;
1099
1100       if (formats[i] == MESA_FORMAT_RGB565) {
1101          depth_bits[0] = 16;
1102          stencil_bits[0] = 0;
1103       } else {
1104          depth_bits[0] = 24;
1105          stencil_bits[0] = 8;
1106       }
1107
1108       new_configs = driCreateConfigs(formats[i],
1109                                      depth_bits, stencil_bits, 1,
1110                                      back_buffer_modes, 1,
1111                                      singlesample_samples, 1,
1112                                      true);
1113       configs = driConcatConfigs(configs, new_configs);
1114    }
1115
1116    /* Generate multisample configs.
1117     *
1118     * This loop breaks early, and hence is a no-op, on gen < 6.
1119     *
1120     * Multisample configs must follow the singlesample configs in order to
1121     * work around an X server bug present in 1.12. The X server chooses to
1122     * associate the first listed RGBA888-Z24S8 config, regardless of its
1123     * sample count, with the 32-bit depth visual used for compositing.
1124     *
1125     * Only doublebuffer configs with GLX_SWAP_UNDEFINED_OML behavior are
1126     * supported.  Singlebuffer configs are not supported because no one wants
1127     * them.
1128     */
1129    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1130       if (devinfo->gen < 6)
1131          break;
1132
1133       __DRIconfig **new_configs;
1134       const int num_depth_stencil_bits = 2;
1135       int num_msaa_modes = 0;
1136
1137       depth_bits[0] = 0;
1138       stencil_bits[0] = 0;
1139
1140       if (formats[i] == MESA_FORMAT_RGB565) {
1141          depth_bits[1] = 16;
1142          stencil_bits[1] = 0;
1143       } else {
1144          depth_bits[1] = 24;
1145          stencil_bits[1] = 8;
1146       }
1147
1148       if (devinfo->gen >= 7)
1149          num_msaa_modes = 2;
1150       else if (devinfo->gen == 6)
1151          num_msaa_modes = 1;
1152
1153       new_configs = driCreateConfigs(formats[i],
1154                                      depth_bits,
1155                                      stencil_bits,
1156                                      num_depth_stencil_bits,
1157                                      back_buffer_modes, 1,
1158                                      multisample_samples,
1159                                      num_msaa_modes,
1160                                      false);
1161       configs = driConcatConfigs(configs, new_configs);
1162    }
1163
1164    if (configs == NULL) {
1165       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1166               __LINE__);
1167       return NULL;
1168    }
1169
1170    return configs;
1171 }
1172
1173 static void
1174 set_max_gl_versions(struct intel_screen *screen)
1175 {
1176    __DRIscreen *psp = screen->driScrnPriv;
1177
1178    switch (screen->devinfo->gen) {
1179    case 7:
1180       psp->max_gl_core_version = 32;
1181       psp->max_gl_compat_version = 30;
1182       psp->max_gl_es1_version = 11;
1183       psp->max_gl_es2_version = 30;
1184       break;
1185    case 6:
1186       psp->max_gl_core_version = 31;
1187       psp->max_gl_compat_version = 30;
1188       psp->max_gl_es1_version = 11;
1189       psp->max_gl_es2_version = 30;
1190       break;
1191    case 5:
1192    case 4:
1193       psp->max_gl_core_version = 0;
1194       psp->max_gl_compat_version = 21;
1195       psp->max_gl_es1_version = 11;
1196       psp->max_gl_es2_version = 20;
1197       break;
1198    default:
1199       assert(!"unrecognized intel_screen::gen");
1200       break;
1201    }
1202 }
1203
1204 /**
1205  * This is the driver specific part of the createNewScreen entry point.
1206  * Called when using DRI2.
1207  *
1208  * \return the struct gl_config supported by this driver
1209  */
1210 static const
1211 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1212 {
1213    struct intel_screen *intelScreen;
1214
1215    if (psp->dri2.loader->base.version <= 2 ||
1216        psp->dri2.loader->getBuffersWithFormat == NULL) {
1217       fprintf(stderr,
1218               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1219               "support required\n");
1220       return false;
1221    }
1222
1223    /* Allocate the private area */
1224    intelScreen = calloc(1, sizeof *intelScreen);
1225    if (!intelScreen) {
1226       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1227       return false;
1228    }
1229    /* parse information in __driConfigOptions */
1230    driParseOptionInfo(&intelScreen->optionCache, __driConfigOptions);
1231
1232    intelScreen->driScrnPriv = psp;
1233    psp->driverPrivate = (void *) intelScreen;
1234
1235    if (!intel_init_bufmgr(intelScreen))
1236        return false;
1237
1238    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1239    intelScreen->devinfo = brw_get_device_info(intelScreen->deviceID);
1240
1241    intelScreen->hw_must_use_separate_stencil = intelScreen->devinfo->gen >= 7;
1242
1243    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1244
1245    set_max_gl_versions(intelScreen);
1246
1247    psp->extensions = intelScreenExtensions;
1248
1249    return (const __DRIconfig**) intel_screen_make_configs(psp);
1250 }
1251
1252 struct intel_buffer {
1253    __DRIbuffer base;
1254    struct intel_region *region;
1255 };
1256
1257 static __DRIbuffer *
1258 intelAllocateBuffer(__DRIscreen *screen,
1259                     unsigned attachment, unsigned format,
1260                     int width, int height)
1261 {
1262    struct intel_buffer *intelBuffer;
1263    struct intel_screen *intelScreen = screen->driverPrivate;
1264
1265    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1266           attachment == __DRI_BUFFER_BACK_LEFT);
1267
1268    intelBuffer = calloc(1, sizeof *intelBuffer);
1269    if (intelBuffer == NULL)
1270       return NULL;
1271
1272    /* The front and back buffers are color buffers, which are X tiled. */
1273    intelBuffer->region = intel_region_alloc(intelScreen,
1274                                             I915_TILING_X,
1275                                             format / 8,
1276                                             width,
1277                                             height,
1278                                             true);
1279
1280    if (intelBuffer->region == NULL) {
1281            free(intelBuffer);
1282            return NULL;
1283    }
1284
1285    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1286
1287    intelBuffer->base.attachment = attachment;
1288    intelBuffer->base.cpp = intelBuffer->region->cpp;
1289    intelBuffer->base.pitch = intelBuffer->region->pitch;
1290
1291    return &intelBuffer->base;
1292 }
1293
1294 static void
1295 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1296 {
1297    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1298
1299    intel_region_release(&intelBuffer->region);
1300    free(intelBuffer);
1301 }
1302
1303
1304 const struct __DriverAPIRec driDriverAPI = {
1305    .InitScreen           = intelInitScreen2,
1306    .DestroyScreen        = intelDestroyScreen,
1307    .CreateContext        = brwCreateContext,
1308    .DestroyContext       = intelDestroyContext,
1309    .CreateBuffer         = intelCreateBuffer,
1310    .DestroyBuffer        = intelDestroyBuffer,
1311    .MakeCurrent          = intelMakeCurrent,
1312    .UnbindContext        = intelUnbindContext,
1313    .AllocateBuffer       = intelAllocateBuffer,
1314    .ReleaseBuffer        = intelReleaseBuffer
1315 };
1316
1317 /* This is the table of extensions that the loader will dlsym() for. */
1318 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1319     &driCoreExtension.base,
1320     &driDRI2Extension.base,
1321     NULL
1322 };