src/mesa/drivers/dri/i915/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(early_z, "false")
  58          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  59       DRI_CONF_OPT_END
  60
  61    DRI_CONF_SECTION_END
  62    DRI_CONF_SECTION_QUALITY
  63       DRI_CONF_FORCE_S3TC_ENABLE("false")
  64       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  65    DRI_CONF_SECTION_END
  66    DRI_CONF_SECTION_DEBUG
  67       DRI_CONF_NO_RAST("false")
  68       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  69       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  70       DRI_CONF_DISABLE_THROTTLING("false")
  71       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  72       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  73       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  74
  75       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  76          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  77       DRI_CONF_OPT_END
  78    DRI_CONF_SECTION_END
  79 DRI_CONF_END;
  80
  81 const GLuint __driNConfigOptions = 13;
  82
  83 #include "intel_batchbuffer.h"
  84 #include "intel_buffers.h"
  85 #include "intel_bufmgr.h"
  86 #include "intel_chipset.h"
  87 #include "intel_fbo.h"
  88 #include "intel_mipmap_tree.h"
  89 #include "intel_screen.h"
  90 #include "intel_tex.h"
  91 #include "intel_regions.h"
  92
  93 #include "i915_drm.h"
  94
  95 #ifdef USE_NEW_INTERFACE
  96 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  97 #endif /*USE_NEW_INTERFACE */
  98
  99 /**
 100  * For debugging purposes, this returns a time in seconds.
 101  */
 102 double
 103 get_time(void)
 104 {
 105    struct timespec tp;
 106
 107    clock_gettime(CLOCK_MONOTONIC, &tp);
 108
 109    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
 110 }
 111
 112 void
 113 aub_dump_bmp(struct gl_context *ctx)
 114 {
 115    struct gl_framebuffer *fb = ctx->DrawBuffer;
 116
 117    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
 118       struct intel_renderbuffer *irb =
 119          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
 120
 121       if (irb && irb->mt) {
 122          enum aub_dump_bmp_format format;
 123
 124          switch (irb->Base.Base.Format) {
 125          case MESA_FORMAT_ARGB8888:
 126          case MESA_FORMAT_XRGB8888:
 127             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
 128             break;
 129          default:
 130             continue;
 131          }
 132
 133          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
 134          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
 135                                        irb->draw_x,
 136                                        irb->draw_y,
 137                                        irb->Base.Base.Width,
 138                                        irb->Base.Base.Height,
 139                                        format,
 140                                        irb->mt->region->pitch,
 141                                        0);
 142       }
 143    }
 144 }
 145
 146 static const __DRItexBufferExtension intelTexBufferExtension = {
 147    .base = { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 148
 149    .setTexBuffer        = intelSetTexBuffer,
 150    .setTexBuffer2       = intelSetTexBuffer2,
 151    .releaseTexBuffer    = NULL,
 152 };
 153
 154 static void
 155 intelDRI2Flush(__DRIdrawable *drawable)
 156 {
 157    GET_CURRENT_CONTEXT(ctx);
 158    struct intel_context *intel = intel_context(ctx);
 159    if (intel == NULL)
 160       return;
 161
 162    if (intel->gen < 4)
 163       INTEL_FIREVERTICES(intel);
 164
 165    intel->need_throttle = true;
 166
 167    if (intel->batch.used)
 168       intel_batchbuffer_flush(intel);
 169
 170    if (INTEL_DEBUG & DEBUG_AUB) {
 171       aub_dump_bmp(ctx);
 172    }
 173 }
 174
 175 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 176     .base = { __DRI2_FLUSH, 3 },
 177
 178     .flush              = intelDRI2Flush,
 179     .invalidate         = dri2InvalidateDrawable,
 180 };
 181
 182 static struct intel_image_format intel_image_formats[] = {
 183    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
 184      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
 185
 186    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
 187      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
 188
 189    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 190      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 191        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
 192        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
 193
 194    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 195      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 196        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 197        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 198
 199    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 200      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 201        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
 202        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
 203
 204    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 205      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 206        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 207        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 208
 209    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
 210      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 211        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 212        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
 213
 214    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 215      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 216        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 217
 218    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
 219      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
 220        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
 221
 222    /* For YUYV buffers, we set up two overlapping DRI images and treat
 223     * them as planar buffers in the compositors.  Plane 0 is GR88 and
 224     * samples YU or YV pairs and places Y into the R component, while
 225     * plane 1 is ARGB and samples YUYV clusters and places pairs and
 226     * places U into the G component and V into A.  This lets the
 227     * texture sampler interpolate the Y components correctly when
 228     * sampling from plane 0, and interpolate U and V correctly when
 229     * sampling from plane 1. */
 230    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
 231      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
 232        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
 233 };
 234
 235 static __DRIimage *
 236 intel_allocate_image(int dri_format, void *loaderPrivate)
 237 {
 238     __DRIimage *image;
 239
 240     image = calloc(1, sizeof *image);
 241     if (image == NULL)
 242         return NULL;
 243
 244     image->dri_format = dri_format;
 245     image->offset = 0;
 246
 247     switch (dri_format) {
 248     case __DRI_IMAGE_FORMAT_RGB565:
 249        image->format = MESA_FORMAT_RGB565;
 250        break;
 251     case __DRI_IMAGE_FORMAT_XRGB8888:
 252        image->format = MESA_FORMAT_XRGB8888;
 253        break;
 254     case __DRI_IMAGE_FORMAT_ARGB8888:
 255        image->format = MESA_FORMAT_ARGB8888;
 256        break;
 257     case __DRI_IMAGE_FORMAT_ABGR8888:
 258        image->format = MESA_FORMAT_RGBA8888_REV;
 259        break;
 260     case __DRI_IMAGE_FORMAT_XBGR8888:
 261        image->format = MESA_FORMAT_RGBX8888_REV;
 262        break;
 263     case __DRI_IMAGE_FORMAT_R8:
 264        image->format = MESA_FORMAT_R8;
 265        break;
 266     case __DRI_IMAGE_FORMAT_GR88:
 267        image->format = MESA_FORMAT_GR88;
 268        break;
 269     case __DRI_IMAGE_FORMAT_NONE:
 270        image->format = MESA_FORMAT_NONE;
 271        break;
 272     default:
 273        free(image);
 274        return NULL;
 275     }
 276
 277     image->internal_format = _mesa_get_format_base_format(image->format);
 278     image->data = loaderPrivate;
 279
 280     return image;
 281 }
 282
 283 /**
 284  * Sets up a DRIImage structure to point to our shared image in a region
 285  */
 286 static void
 287 intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
 288                                    struct intel_mipmap_tree *mt, GLuint level,
 289                                    GLuint zoffset)
 290 {
 291    unsigned int draw_x, draw_y;
 292    uint32_t mask_x, mask_y;
 293
 294    intel_miptree_check_level_layer(mt, level, zoffset);
 295
 296    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
 297    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
 298
 299    image->width = mt->level[level].width;
 300    image->height = mt->level[level].height;
 301    image->tile_x = draw_x & mask_x;
 302    image->tile_y = draw_y & mask_y;
 303
 304    image->offset = intel_region_get_aligned_offset(mt->region,
 305                                                    draw_x & ~mask_x,
 306                                                    draw_y & ~mask_y,
 307                                                    false);
 308
 309    intel_region_reference(&image->region, mt->region);
 310 }
 311
 312 static void
 313 intel_setup_image_from_dimensions(__DRIimage *image)
 314 {
 315    image->width    = image->region->width;
 316    image->height   = image->region->height;
 317    image->tile_x = 0;
 318    image->tile_y = 0;
 319    image->has_depthstencil = false;
 320 }
 321
 322 static inline uint32_t
 323 intel_dri_format(GLuint format)
 324 {
 325    switch (format) {
 326    case MESA_FORMAT_RGB565:
 327       return __DRI_IMAGE_FORMAT_RGB565;
 328    case MESA_FORMAT_XRGB8888:
 329       return __DRI_IMAGE_FORMAT_XRGB8888;
 330    case MESA_FORMAT_ARGB8888:
 331       return __DRI_IMAGE_FORMAT_ARGB8888;
 332    case MESA_FORMAT_RGBA8888_REV:
 333       return __DRI_IMAGE_FORMAT_ABGR8888;
 334    case MESA_FORMAT_R8:
 335       return __DRI_IMAGE_FORMAT_R8;
 336    case MESA_FORMAT_RG88:
 337       return __DRI_IMAGE_FORMAT_GR88;
 338    }
 339
 340    return MESA_FORMAT_NONE;
 341 }
 342
 343 static __DRIimage *
 344 intel_create_image_from_name(__DRIscreen *screen,
 345                              int width, int height, int format,
 346                              int name, int pitch, void *loaderPrivate)
 347 {
 348     struct intel_screen *intelScreen = screen->driverPrivate;
 349     __DRIimage *image;
 350     int cpp;
 351
 352     image = intel_allocate_image(format, loaderPrivate);
 353     if (image == NULL)
 354        return NULL;
 355
 356     if (image->format == MESA_FORMAT_NONE)
 357        cpp = 1;
 358     else
 359        cpp = _mesa_get_format_bytes(image->format);
 360     image->region = intel_region_alloc_for_handle(intelScreen,
 361                                                   cpp, width, height,
 362                                                   pitch * cpp, name, "image");
 363     if (image->region == NULL) {
 364        free(image);
 365        return NULL;
 366     }
 367
 368     intel_setup_image_from_dimensions(image);
 369
 370     return image;
 371 }
 372
 373 static __DRIimage *
 374 intel_create_image_from_renderbuffer(__DRIcontext *context,
 375                                      int renderbuffer, void *loaderPrivate)
 376 {
 377    __DRIimage *image;
 378    struct intel_context *intel = context->driverPrivate;
 379    struct gl_renderbuffer *rb;
 380    struct intel_renderbuffer *irb;
 381
 382    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 383    if (!rb) {
 384       _mesa_error(&intel->ctx,
 385                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 386       return NULL;
 387    }
 388
 389    irb = intel_renderbuffer(rb);
 390    image = calloc(1, sizeof *image);
 391    if (image == NULL)
 392       return NULL;
 393
 394    image->internal_format = rb->InternalFormat;
 395    image->format = rb->Format;
 396    image->offset = 0;
 397    image->data = loaderPrivate;
 398    intel_region_reference(&image->region, irb->mt->region);
 399    intel_setup_image_from_dimensions(image);
 400    image->dri_format = intel_dri_format(image->format);
 401    image->has_depthstencil = irb->mt->stencil_mt? true : false;
 402
 403    rb->NeedsFinishRenderTexture = true;
 404    return image;
 405 }
 406
 407 static __DRIimage *
 408 intel_create_image_from_texture(__DRIcontext *context, int target,
 409                                 unsigned texture, int zoffset,
 410                                 int level,
 411                                 unsigned *error,
 412                                 void *loaderPrivate)
 413 {
 414    __DRIimage *image;
 415    struct intel_context *intel = context->driverPrivate;
 416    struct gl_texture_object *obj;
 417    struct intel_texture_object *iobj;
 418    GLuint face = 0;
 419
 420    obj = _mesa_lookup_texture(&intel->ctx, texture);
 421    if (!obj || obj->Target != target) {
 422       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 423       return NULL;
 424    }
 425
 426    if (target == GL_TEXTURE_CUBE_MAP)
 427       face = zoffset;
 428
 429    _mesa_test_texobj_completeness(&intel->ctx, obj);
 430    iobj = intel_texture_object(obj);
 431    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
 432       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 433       return NULL;
 434    }
 435
 436    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
 437       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 438       return NULL;
 439    }
 440
 441    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
 442       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
 443       return NULL;
 444    }
 445    image = calloc(1, sizeof *image);
 446    if (image == NULL) {
 447       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
 448       return NULL;
 449    }
 450
 451    image->internal_format = obj->Image[face][level]->InternalFormat;
 452    image->format = obj->Image[face][level]->TexFormat;
 453    image->data = loaderPrivate;
 454    intel_setup_image_from_mipmap_tree(intel, image, iobj->mt, level, zoffset);
 455    image->dri_format = intel_dri_format(image->format);
 456    image->has_depthstencil = iobj->mt->stencil_mt? true : false;
 457    if (image->dri_format == MESA_FORMAT_NONE) {
 458       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
 459       free(image);
 460       return NULL;
 461    }
 462
 463    *error = __DRI_IMAGE_ERROR_SUCCESS;
 464    return image;
 465 }
 466
 467 static void
 468 intel_destroy_image(__DRIimage *image)
 469 {
 470     intel_region_release(&image->region);
 471     free(image);
 472 }
 473
 474 static __DRIimage *
 475 intel_create_image(__DRIscreen *screen,
 476                    int width, int height, int format,
 477                    unsigned int use,
 478                    void *loaderPrivate)
 479 {
 480    __DRIimage *image;
 481    struct intel_screen *intelScreen = screen->driverPrivate;
 482    uint32_t tiling;
 483    int cpp;
 484
 485    tiling = I915_TILING_X;
 486    if (use & __DRI_IMAGE_USE_CURSOR) {
 487       if (width != 64 || height != 64)
 488          return NULL;
 489       tiling = I915_TILING_NONE;
 490    }
 491
 492    image = intel_allocate_image(format, loaderPrivate);
 493    if (image == NULL)
 494       return NULL;
 495
 496    cpp = _mesa_get_format_bytes(image->format);
 497    image->region =
 498       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
 499    if (image->region == NULL) {
 500       free(image);
 501       return NULL;
 502    }
 503
 504    intel_setup_image_from_dimensions(image);
 505
 506    return image;
 507 }
 508
 509 static GLboolean
 510 intel_query_image(__DRIimage *image, int attrib, int *value)
 511 {
 512    switch (attrib) {
 513    case __DRI_IMAGE_ATTRIB_STRIDE:
 514       *value = image->region->pitch;
 515       return true;
 516    case __DRI_IMAGE_ATTRIB_HANDLE:
 517       *value = image->region->bo->handle;
 518       return true;
 519    case __DRI_IMAGE_ATTRIB_NAME:
 520       return intel_region_flink(image->region, (uint32_t *) value);
 521    case __DRI_IMAGE_ATTRIB_FORMAT:
 522       *value = image->dri_format;
 523       return true;
 524    case __DRI_IMAGE_ATTRIB_WIDTH:
 525       *value = image->region->width;
 526       return true;
 527    case __DRI_IMAGE_ATTRIB_HEIGHT:
 528       *value = image->region->height;
 529       return true;
 530    case __DRI_IMAGE_ATTRIB_COMPONENTS:
 531       if (image->planar_format == NULL)
 532          return false;
 533       *value = image->planar_format->components;
 534       return true;
 535    case __DRI_IMAGE_ATTRIB_FD:
 536       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
 537          return true;
 538       return false;
 539   default:
 540       return false;
 541    }
 542 }
 543
 544 static __DRIimage *
 545 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 546 {
 547    __DRIimage *image;
 548
 549    image = calloc(1, sizeof *image);
 550    if (image == NULL)
 551       return NULL;
 552
 553    intel_region_reference(&image->region, orig_image->region);
 554    if (image->region == NULL) {
 555       free(image);
 556       return NULL;
 557    }
 558
 559    image->internal_format = orig_image->internal_format;
 560    image->planar_format   = orig_image->planar_format;
 561    image->dri_format      = orig_image->dri_format;
 562    image->format          = orig_image->format;
 563    image->offset          = orig_image->offset;
 564    image->width           = orig_image->width;
 565    image->height          = orig_image->height;
 566    image->tile_x          = orig_image->tile_x;
 567    image->tile_y          = orig_image->tile_y;
 568    image->has_depthstencil = orig_image->has_depthstencil;
 569    image->data            = loaderPrivate;
 570
 571    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
 572    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
 573
 574    return image;
 575 }
 576
 577 static GLboolean
 578 intel_validate_usage(__DRIimage *image, unsigned int use)
 579 {
 580    if (use & __DRI_IMAGE_USE_CURSOR) {
 581       if (image->region->width != 64 || image->region->height != 64)
 582          return GL_FALSE;
 583    }
 584
 585    return GL_TRUE;
 586 }
 587
 588 static __DRIimage *
 589 intel_create_image_from_names(__DRIscreen *screen,
 590                               int width, int height, int fourcc,
 591                               int *names, int num_names,
 592                               int *strides, int *offsets,
 593                               void *loaderPrivate)
 594 {
 595     struct intel_image_format *f = NULL;
 596     __DRIimage *image;
 597     int i, index;
 598
 599     if (screen == NULL || names == NULL || num_names != 1)
 600         return NULL;
 601
 602     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 603         if (intel_image_formats[i].fourcc == fourcc) {
 604            f = &intel_image_formats[i];
 605         }
 606     }
 607
 608     if (f == NULL)
 609         return NULL;
 610
 611     image = intel_create_image_from_name(screen, width, height,
 612                                          __DRI_IMAGE_FORMAT_NONE,
 613                                          names[0], strides[0],
 614                                          loaderPrivate);
 615
 616    if (image == NULL)
 617       return NULL;
 618
 619     image->planar_format = f;
 620     for (i = 0; i < f->nplanes; i++) {
 621         index = f->planes[i].buffer_index;
 622         image->offsets[index] = offsets[index];
 623         image->strides[index] = strides[index];
 624     }
 625
 626     return image;
 627 }
 628
 629 static __DRIimage *
 630 intel_create_image_from_fds(__DRIscreen *screen,
 631                             int width, int height, int fourcc,
 632                             int *fds, int num_fds, int *strides, int *offsets,
 633                             void *loaderPrivate)
 634 {
 635    struct intel_screen *intelScreen = screen->driverPrivate;
 636    struct intel_image_format *f = NULL;
 637    __DRIimage *image;
 638    int i, index;
 639
 640    if (fds == NULL || num_fds != 1)
 641       return NULL;
 642
 643    for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
 644       if (intel_image_formats[i].fourcc == fourcc) {
 645          f = &intel_image_formats[i];
 646       }
 647    }
 648
 649    if (f == NULL)
 650       return NULL;
 651
 652    image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
 653    if (image == NULL)
 654       return NULL;
 655
 656    image->region = intel_region_alloc_for_fd(intelScreen,
 657                                              1, width, height,
 658                                              strides[0], fds[0], "image");
 659    if (image->region == NULL) {
 660       free(image);
 661       return NULL;
 662    }
 663
 664    image->planar_format = f;
 665    for (i = 0; i < f->nplanes; i++) {
 666       index = f->planes[i].buffer_index;
 667       image->offsets[index] = offsets[index];
 668       image->strides[index] = strides[index];
 669    }
 670
 671    return image;
 672 }
 673
 674
 675 static __DRIimage *
 676 intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
 677 {
 678     int width, height, offset, stride, dri_format, index;
 679     struct intel_image_format *f;
 680     uint32_t mask_x, mask_y;
 681     __DRIimage *image;
 682
 683     if (parent == NULL || parent->planar_format == NULL)
 684         return NULL;
 685
 686     f = parent->planar_format;
 687
 688     if (plane >= f->nplanes)
 689         return NULL;
 690
 691     width = parent->region->width >> f->planes[plane].width_shift;
 692     height = parent->region->height >> f->planes[plane].height_shift;
 693     dri_format = f->planes[plane].dri_format;
 694     index = f->planes[plane].buffer_index;
 695     offset = parent->offsets[index];
 696     stride = parent->strides[index];
 697
 698     image = intel_allocate_image(dri_format, loaderPrivate);
 699     if (image == NULL)
 700        return NULL;
 701
 702     if (offset + height * stride > parent->region->bo->size) {
 703        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
 704        free(image);
 705        return NULL;
 706     }
 707
 708     image->region = calloc(sizeof(*image->region), 1);
 709     if (image->region == NULL) {
 710        free(image);
 711        return NULL;
 712     }
 713
 714     image->region->cpp = _mesa_get_format_bytes(image->format);
 715     image->region->width = width;
 716     image->region->height = height;
 717     image->region->pitch = stride;
 718     image->region->refcount = 1;
 719     image->region->bo = parent->region->bo;
 720     drm_intel_bo_reference(image->region->bo);
 721     image->region->tiling = parent->region->tiling;
 722     image->offset = offset;
 723     intel_setup_image_from_dimensions(image);
 724
 725     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
 726     if (offset & mask_x)
 727        _mesa_warning(NULL,
 728                      "intel_create_sub_image: offset not on tile boundary");
 729
 730     return image;
 731 }
 732
 733 static struct __DRIimageExtensionRec intelImageExtension = {
 734     .base = { __DRI_IMAGE, 7 },
 735
 736     .createImageFromName                = intel_create_image_from_name,
 737     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
 738     .destroyImage                       = intel_destroy_image,
 739     .createImage                        = intel_create_image,
 740     .queryImage                         = intel_query_image,
 741     .dupImage                           = intel_dup_image,
 742     .validateUsage                      = intel_validate_usage,
 743     .createImageFromNames               = intel_create_image_from_names,
 744     .fromPlanar                         = intel_from_planar,
 745     .createImageFromTexture             = intel_create_image_from_texture,
 746     .createImageFromFds                 = intel_create_image_from_fds
 747 };
 748
 749 static const __DRIextension *intelScreenExtensions[] = {
 750     &intelTexBufferExtension.base,
 751     &intelFlushExtension.base,
 752     &intelImageExtension.base,
 753     &dri2ConfigQueryExtension.base,
 754     NULL
 755 };
 756
 757 static bool
 758 intel_get_param(__DRIscreen *psp, int param, int *value)
 759 {
 760    int ret;
 761    struct drm_i915_getparam gp;
 762
 763    memset(&gp, 0, sizeof(gp));
 764    gp.param = param;
 765    gp.value = value;
 766
 767    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 768    if (ret) {
 769       if (ret != -EINVAL)
 770          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 771       return false;
 772    }
 773
 774    return true;
 775 }
 776
 777 static bool
 778 intel_get_boolean(__DRIscreen *psp, int param)
 779 {
 780    int value = 0;
 781    return intel_get_param(psp, param, &value) && value;
 782 }
 783
 784 static void
 785 intelDestroyScreen(__DRIscreen * sPriv)
 786 {
 787    struct intel_screen *intelScreen = sPriv->driverPrivate;
 788
 789    dri_bufmgr_destroy(intelScreen->bufmgr);
 790    driDestroyOptionInfo(&intelScreen->optionCache);
 791
 792    free(intelScreen);
 793    sPriv->driverPrivate = NULL;
 794 }
 795
 796
 797 /**
 798  * This is called when we need to set up GL rendering to a new X window.
 799  */
 800 static GLboolean
 801 intelCreateBuffer(__DRIscreen * driScrnPriv,
 802                   __DRIdrawable * driDrawPriv,
 803                   const struct gl_config * mesaVis, GLboolean isPixmap)
 804 {
 805    struct intel_renderbuffer *rb;
 806    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->driverPrivate;
 807    gl_format rgbFormat;
 808    struct gl_framebuffer *fb;
 809
 810    if (isPixmap)
 811       return false;
 812
 813    fb = CALLOC_STRUCT(gl_framebuffer);
 814    if (!fb)
 815       return false;
 816
 817    _mesa_initialize_window_framebuffer(fb, mesaVis);
 818
 819    if (mesaVis->redBits == 5)
 820       rgbFormat = MESA_FORMAT_RGB565;
 821    else if (mesaVis->sRGBCapable)
 822       rgbFormat = MESA_FORMAT_SARGB8;
 823    else if (mesaVis->alphaBits == 0)
 824       rgbFormat = MESA_FORMAT_XRGB8888;
 825    else {
 826       if (screen->gen >= 4) {
 827          rgbFormat = MESA_FORMAT_SARGB8;
 828          fb->Visual.sRGBCapable = true;
 829       } else {
 830          rgbFormat = MESA_FORMAT_ARGB8888;
 831       }
 832
 833    }
 834
 835    /* setup the hardware-based renderbuffers */
 836    rb = intel_create_renderbuffer(rgbFormat);
 837    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
 838
 839    if (mesaVis->doubleBufferMode) {
 840       rb = intel_create_renderbuffer(rgbFormat);
 841       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
 842    }
 843
 844    /*
 845     * Assert here that the gl_config has an expected depth/stencil bit
 846     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 847     * which constructs the advertised configs.)
 848     */
 849    if (mesaVis->depthBits == 24) {
 850       assert(mesaVis->stencilBits == 8);
 851
 852       if (screen->hw_has_separate_stencil) {
 853          rb = intel_create_private_renderbuffer(MESA_FORMAT_X8_Z24);
 854          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 855          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8);
 856          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 857       } else {
 858          /*
 859           * Use combined depth/stencil. Note that the renderbuffer is
 860           * attached to two attachment points.
 861           */
 862          rb = intel_create_private_renderbuffer(MESA_FORMAT_S8_Z24);
 863          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 864          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
 865       }
 866    }
 867    else if (mesaVis->depthBits == 16) {
 868       assert(mesaVis->stencilBits == 0);
 869       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z16);
 870       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
 871    }
 872    else {
 873       assert(mesaVis->depthBits == 0);
 874       assert(mesaVis->stencilBits == 0);
 875    }
 876
 877    /* now add any/all software-based renderbuffers we may need */
 878    _swrast_add_soft_renderbuffers(fb,
 879                                   false, /* never sw color */
 880                                   false, /* never sw depth */
 881                                   false, /* never sw stencil */
 882                                   mesaVis->accumRedBits > 0,
 883                                   false, /* never sw alpha */
 884                                   false  /* never sw aux */ );
 885    driDrawPriv->driverPrivate = fb;
 886
 887    return true;
 888 }
 889
 890 static void
 891 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 892 {
 893     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 894
 895     _mesa_reference_framebuffer(&fb, NULL);
 896 }
 897
 898 /* There are probably better ways to do this, such as an
 899  * init-designated function to register chipids and createcontext
 900  * functions.
 901  */
 902 extern bool
 903 i830CreateContext(int api,
 904                   const struct gl_config *mesaVis,
 905                   __DRIcontext *driContextPriv,
 906                   unsigned major_version,
 907                   unsigned minor_version,
 908                   unsigned *error,
 909                   void *sharedContextPrivate);
 910
 911 extern bool
 912 i915CreateContext(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 static GLboolean
 921 intelCreateContext(gl_api api,
 922                    const struct gl_config * mesaVis,
 923                    __DRIcontext * driContextPriv,
 924                    unsigned major_version,
 925                    unsigned minor_version,
 926                    uint32_t flags,
 927                    unsigned *error,
 928                    void *sharedContextPrivate)
 929 {
 930    bool success = false;
 931
 932    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 933    struct intel_screen *intelScreen = sPriv->driverPrivate;
 934
 935    if (IS_9XX(intelScreen->deviceID)) {
 936       success = i915CreateContext(api, mesaVis, driContextPriv,
 937                                   major_version, minor_version, error,
 938                                   sharedContextPrivate);
 939    } else {
 940       intelScreen->no_vbo = true;
 941       success = i830CreateContext(api, mesaVis, driContextPriv,
 942                                   major_version, minor_version, error,
 943                                   sharedContextPrivate);
 944    }
 945
 946    if (success)
 947       return true;
 948
 949    if (driContextPriv->driverPrivate != NULL)
 950       intelDestroyContext(driContextPriv);
 951
 952    return false;
 953 }
 954
 955 static bool
 956 intel_init_bufmgr(struct intel_screen *intelScreen)
 957 {
 958    __DRIscreen *spriv = intelScreen->driScrnPriv;
 959
 960    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
 961
 962    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 963    if (intelScreen->bufmgr == NULL) {
 964       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 965               __func__, __LINE__);
 966       return false;
 967    }
 968
 969    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 970
 971    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
 972       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
 973       return false;
 974    }
 975
 976    return true;
 977 }
 978
 979 /**
 980  * Override intel_screen.hw_has_separate_stencil with environment variable
 981  * INTEL_SEPARATE_STENCIL.
 982  *
 983  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 984  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 985  * is ignored.
 986  */
 987 static void
 988 intel_override_separate_stencil(struct intel_screen *screen)
 989 {
 990    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 991    if (!s) {
 992       return;
 993    } else if (!strncmp("0", s, 2)) {
 994       screen->hw_has_separate_stencil = false;
 995    } else if (!strncmp("1", s, 2)) {
 996       screen->hw_has_separate_stencil = true;
 997    } else {
 998       fprintf(stderr,
 999               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
1000               "invalid value and is ignored", s);
1001    }
1002 }
1003
1004 static bool
1005 intel_detect_swizzling(struct intel_screen *screen)
1006 {
1007    drm_intel_bo *buffer;
1008    unsigned long flags = 0;
1009    unsigned long aligned_pitch;
1010    uint32_t tiling = I915_TILING_X;
1011    uint32_t swizzle_mode = 0;
1012
1013    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
1014                                      64, 64, 4,
1015                                      &tiling, &aligned_pitch, flags);
1016    if (buffer == NULL)
1017       return false;
1018
1019    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
1020    drm_intel_bo_unreference(buffer);
1021
1022    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
1023       return false;
1024    else
1025       return true;
1026 }
1027
1028 static __DRIconfig**
1029 intel_screen_make_configs(__DRIscreen *dri_screen)
1030 {
1031    static const gl_format formats[] = {
1032       MESA_FORMAT_RGB565,
1033       MESA_FORMAT_ARGB8888
1034    };
1035
1036    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
1037    static const GLenum back_buffer_modes[] = {
1038        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
1039    };
1040
1041    static const uint8_t singlesample_samples[1] = {0};
1042
1043    struct intel_screen *screen = dri_screen->driverPrivate;
1044    uint8_t depth_bits[4], stencil_bits[4];
1045    __DRIconfig **configs = NULL;
1046
1047    /* Generate singlesample configs without accumulation buffer. */
1048    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1049       __DRIconfig **new_configs;
1050       int num_depth_stencil_bits = 2;
1051
1052       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
1053        * buffer that has a different number of bits per pixel than the color
1054        * buffer, gen >= 6 supports this.
1055        */
1056       depth_bits[0] = 0;
1057       stencil_bits[0] = 0;
1058
1059       if (formats[i] == MESA_FORMAT_RGB565) {
1060          depth_bits[1] = 16;
1061          stencil_bits[1] = 0;
1062          if (screen->gen >= 6) {
1063              depth_bits[2] = 24;
1064              stencil_bits[2] = 8;
1065              num_depth_stencil_bits = 3;
1066          }
1067       } else {
1068          depth_bits[1] = 24;
1069          stencil_bits[1] = 8;
1070       }
1071
1072       new_configs = driCreateConfigs(formats[i],
1073                                      depth_bits,
1074                                      stencil_bits,
1075                                      num_depth_stencil_bits,
1076                                      back_buffer_modes, 2,
1077                                      singlesample_samples, 1,
1078                                      false);
1079       configs = driConcatConfigs(configs, new_configs);
1080    }
1081
1082    /* Generate the minimum possible set of configs that include an
1083     * accumulation buffer.
1084     */
1085    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
1086       __DRIconfig **new_configs;
1087
1088       if (formats[i] == MESA_FORMAT_RGB565) {
1089          depth_bits[0] = 16;
1090          stencil_bits[0] = 0;
1091       } else {
1092          depth_bits[0] = 24;
1093          stencil_bits[0] = 8;
1094       }
1095
1096       new_configs = driCreateConfigs(formats[i],
1097                                      depth_bits, stencil_bits, 1,
1098                                      back_buffer_modes, 1,
1099                                      singlesample_samples, 1,
1100                                      true);
1101       configs = driConcatConfigs(configs, new_configs);
1102    }
1103
1104    if (configs == NULL) {
1105       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
1106               __LINE__);
1107       return NULL;
1108    }
1109
1110    return configs;
1111 }
1112
1113 static void
1114 set_max_gl_versions(struct intel_screen *screen)
1115 {
1116    int gl_version_override = _mesa_get_gl_version_override();
1117
1118    switch (screen->gen) {
1119    case 7:
1120       screen->max_gl_core_version = 31;
1121       screen->max_gl_compat_version = 30;
1122       screen->max_gl_es1_version = 11;
1123       screen->max_gl_es2_version = 30;
1124       break;
1125    case 6:
1126       screen->max_gl_core_version = 31;
1127       screen->max_gl_compat_version = 30;
1128       screen->max_gl_es1_version = 11;
1129       screen->max_gl_es2_version = 30;
1130       break;
1131    case 5:
1132    case 4:
1133       screen->max_gl_core_version = 0;
1134       screen->max_gl_compat_version = 21;
1135       screen->max_gl_es1_version = 11;
1136       screen->max_gl_es2_version = 20;
1137       break;
1138    case 3: {
1139       screen->max_gl_core_version = 0;
1140       screen->max_gl_es1_version = 11;
1141       screen->max_gl_compat_version = 21;
1142       screen->max_gl_es2_version = 20;
1143
1144       break;
1145    }
1146    case 2:
1147       screen->max_gl_core_version = 0;
1148       screen->max_gl_compat_version = 13;
1149       screen->max_gl_es1_version = 11;
1150       screen->max_gl_es2_version = 0;
1151       break;
1152    default:
1153       assert(!"unrecognized intel_screen::gen");
1154       break;
1155    }
1156
1157    if (gl_version_override >= 31) {
1158       screen->max_gl_core_version = MAX2(screen->max_gl_core_version,
1159                                          gl_version_override);
1160    } else {
1161       screen->max_gl_compat_version = MAX2(screen->max_gl_compat_version,
1162                                            gl_version_override);
1163    }
1164
1165 #ifndef FEATURE_ES1
1166    screen->max_gl_es1_version = 0;
1167 #endif
1168
1169 #ifndef FEATURE_ES2
1170    screen->max_gl_es2_version = 0;
1171 #endif
1172 }
1173
1174 /**
1175  * This is the driver specific part of the createNewScreen entry point.
1176  * Called when using DRI2.
1177  *
1178  * \return the struct gl_config supported by this driver
1179  */
1180 static const
1181 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
1182 {
1183    struct intel_screen *intelScreen;
1184
1185    if (psp->dri2.loader->base.version <= 2 ||
1186        psp->dri2.loader->getBuffersWithFormat == NULL) {
1187       fprintf(stderr,
1188               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
1189               "support required\n");
1190       return false;
1191    }
1192
1193    /* Allocate the private area */
1194    intelScreen = calloc(1, sizeof *intelScreen);
1195    if (!intelScreen) {
1196       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
1197       return false;
1198    }
1199    /* parse information in __driConfigOptions */
1200    driParseOptionInfo(&intelScreen->optionCache,
1201                       __driConfigOptions, __driNConfigOptions);
1202
1203    intelScreen->driScrnPriv = psp;
1204    psp->driverPrivate = (void *) intelScreen;
1205
1206    if (!intel_init_bufmgr(intelScreen))
1207        return false;
1208
1209    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
1210
1211    if (IS_GEN7(intelScreen->deviceID)) {
1212       intelScreen->gen = 7;
1213    } else if (IS_GEN6(intelScreen->deviceID)) {
1214       intelScreen->gen = 6;
1215    } else if (IS_GEN5(intelScreen->deviceID)) {
1216       intelScreen->gen = 5;
1217    } else if (IS_965(intelScreen->deviceID)) {
1218       intelScreen->gen = 4;
1219    } else if (IS_9XX(intelScreen->deviceID)) {
1220       intelScreen->gen = 3;
1221    } else {
1222       intelScreen->gen = 2;
1223    }
1224
1225    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 6;
1226    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
1227
1228    int has_llc = 0;
1229    bool success = intel_get_param(intelScreen->driScrnPriv, I915_PARAM_HAS_LLC,
1230                                   &has_llc);
1231    if (success && has_llc)
1232       intelScreen->hw_has_llc = true;
1233    else if (!success && intelScreen->gen >= 6)
1234       intelScreen->hw_has_llc = true;
1235
1236    intel_override_separate_stencil(intelScreen);
1237
1238    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
1239
1240    set_max_gl_versions(intelScreen);
1241
1242    psp->api_mask = (1 << __DRI_API_OPENGL);
1243    if (intelScreen->max_gl_core_version > 0)
1244       psp->api_mask |= (1 << __DRI_API_OPENGL_CORE);
1245    if (intelScreen->max_gl_es1_version > 0)
1246       psp->api_mask |= (1 << __DRI_API_GLES);
1247    if (intelScreen->max_gl_es2_version > 0)
1248       psp->api_mask |= (1 << __DRI_API_GLES2);
1249    if (intelScreen->max_gl_es2_version >= 30)
1250       psp->api_mask |= (1 << __DRI_API_GLES3);
1251
1252    psp->extensions = intelScreenExtensions;
1253
1254    return (const __DRIconfig**) intel_screen_make_configs(psp);
1255 }
1256
1257 struct intel_buffer {
1258    __DRIbuffer base;
1259    struct intel_region *region;
1260 };
1261
1262 static __DRIbuffer *
1263 intelAllocateBuffer(__DRIscreen *screen,
1264                     unsigned attachment, unsigned format,
1265                     int width, int height)
1266 {
1267    struct intel_buffer *intelBuffer;
1268    struct intel_screen *intelScreen = screen->driverPrivate;
1269
1270    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
1271           attachment == __DRI_BUFFER_BACK_LEFT);
1272
1273    intelBuffer = calloc(1, sizeof *intelBuffer);
1274    if (intelBuffer == NULL)
1275       return NULL;
1276
1277    /* The front and back buffers are color buffers, which are X tiled. */
1278    intelBuffer->region = intel_region_alloc(intelScreen,
1279                                             I915_TILING_X,
1280                                             format / 8,
1281                                             width,
1282                                             height,
1283                                             true);
1284
1285    if (intelBuffer->region == NULL) {
1286            free(intelBuffer);
1287            return NULL;
1288    }
1289
1290    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
1291
1292    intelBuffer->base.attachment = attachment;
1293    intelBuffer->base.cpp = intelBuffer->region->cpp;
1294    intelBuffer->base.pitch = intelBuffer->region->pitch;
1295
1296    return &intelBuffer->base;
1297 }
1298
1299 static void
1300 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
1301 {
1302    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
1303
1304    intel_region_release(&intelBuffer->region);
1305    free(intelBuffer);
1306 }
1307
1308
1309 const struct __DriverAPIRec driDriverAPI = {
1310    .InitScreen           = intelInitScreen2,
1311    .DestroyScreen        = intelDestroyScreen,
1312    .CreateContext        = intelCreateContext,
1313    .DestroyContext       = intelDestroyContext,
1314    .CreateBuffer         = intelCreateBuffer,
1315    .DestroyBuffer        = intelDestroyBuffer,
1316    .MakeCurrent          = intelMakeCurrent,
1317    .UnbindContext        = intelUnbindContext,
1318    .AllocateBuffer       = intelAllocateBuffer,
1319    .ReleaseBuffer        = intelReleaseBuffer
1320 };
1321
1322 /* This is the table of extensions that the loader will dlsym() for. */
1323 PUBLIC const __DRIextension *__driDriverExtensions[] = {
1324     &driCoreExtension.base,
1325     &driDRI2Extension.base,
1326     NULL
1327 };