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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "main/glheader.h"
  29 #include "main/context.h"
  30 #include "main/framebuffer.h"
  31 #include "main/renderbuffer.h"
  32 #include "main/hash.h"
  33 #include "main/fbobject.h"
  34 #include "main/mfeatures.h"
  35
  36 #include "utils.h"
  37 #include "xmlpool.h"
  38
  39 PUBLIC const char __driConfigOptions[] =
  40    DRI_CONF_BEGIN
  41    DRI_CONF_SECTION_PERFORMANCE
  42       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  43       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  44        * DRI_CONF_BO_REUSE_ALL
  45        */
  46       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  47          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  48             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  49             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  50          DRI_CONF_DESC_END
  51       DRI_CONF_OPT_END
  52
  53       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  54          DRI_CONF_DESC(en, "Enable texture tiling")
  55       DRI_CONF_OPT_END
  56
  57       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  58          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  59       DRI_CONF_OPT_END
  60
  61       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  62          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  63       DRI_CONF_OPT_END
  64
  65    DRI_CONF_SECTION_END
  66    DRI_CONF_SECTION_QUALITY
  67       DRI_CONF_FORCE_S3TC_ENABLE(false)
  68       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  69    DRI_CONF_SECTION_END
  70    DRI_CONF_SECTION_DEBUG
  71      DRI_CONF_NO_RAST(false)
  72      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  73      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  74
  75       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  76          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  77       DRI_CONF_OPT_END
  78    DRI_CONF_SECTION_END
  79 DRI_CONF_END;
  80
  81 const GLuint __driNConfigOptions = 11;
  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_screen.h"
  89 #include "intel_tex.h"
  90 #include "intel_regions.h"
  91
  92 #include "i915_drm.h"
  93
  94 #ifdef USE_NEW_INTERFACE
  95 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
  96 #endif /*USE_NEW_INTERFACE */
  97
  98 static const __DRItexBufferExtension intelTexBufferExtension = {
  99     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 100    intelSetTexBuffer,
 101    intelSetTexBuffer2,
 102 };
 103
 104 static void
 105 intelDRI2Flush(__DRIdrawable *drawable)
 106 {
 107    GET_CURRENT_CONTEXT(ctx);
 108    struct intel_context *intel = intel_context(ctx);
 109
 110    if (intel->gen < 4)
 111       INTEL_FIREVERTICES(intel);
 112
 113    intel->need_throttle = GL_TRUE;
 114
 115    if (intel->batch.used)
 116       intel_batchbuffer_flush(intel);
 117 }
 118
 119 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 120     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 121     intelDRI2Flush,
 122     dri2InvalidateDrawable,
 123 };
 124
 125 static __DRIimage *
 126 intel_create_image_from_name(__DRIscreen *screen,
 127                              int width, int height, int format,
 128                              int name, int pitch, void *loaderPrivate)
 129 {
 130     struct intel_screen *intelScreen = screen->private;
 131     __DRIimage *image;
 132     int cpp;
 133
 134     image = CALLOC(sizeof *image);
 135     if (image == NULL)
 136         return NULL;
 137
 138     switch (format) {
 139     case __DRI_IMAGE_FORMAT_RGB565:
 140        image->format = MESA_FORMAT_RGB565;
 141        image->internal_format = GL_RGB;
 142        image->data_type = GL_UNSIGNED_BYTE;
 143        break;
 144     case __DRI_IMAGE_FORMAT_XRGB8888:
 145        image->format = MESA_FORMAT_XRGB8888;
 146        image->internal_format = GL_RGB;
 147        image->data_type = GL_UNSIGNED_BYTE;
 148        break;
 149     case __DRI_IMAGE_FORMAT_ARGB8888:
 150        image->format = MESA_FORMAT_ARGB8888;
 151        image->internal_format = GL_RGBA;
 152        image->data_type = GL_UNSIGNED_BYTE;
 153        break;
 154     default:
 155        free(image);
 156        return NULL;
 157     }
 158
 159     image->data = loaderPrivate;
 160     cpp = _mesa_get_format_bytes(image->format);
 161
 162     image->region = intel_region_alloc_for_handle(intelScreen,
 163                                                   cpp, width, height,
 164                                                   pitch, name, "image");
 165     if (image->region == NULL) {
 166        FREE(image);
 167        return NULL;
 168     }
 169
 170     return image;
 171 }
 172
 173 static __DRIimage *
 174 intel_create_image_from_renderbuffer(__DRIcontext *context,
 175                                      int renderbuffer, void *loaderPrivate)
 176 {
 177    __DRIimage *image;
 178    struct intel_context *intel = context->driverPrivate;
 179    struct gl_renderbuffer *rb;
 180    struct intel_renderbuffer *irb;
 181
 182    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 183    if (!rb) {
 184       _mesa_error(&intel->ctx,
 185                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 186       return NULL;
 187    }
 188
 189    irb = intel_renderbuffer(rb);
 190    image = CALLOC(sizeof *image);
 191    if (image == NULL)
 192       return NULL;
 193
 194    image->internal_format = rb->InternalFormat;
 195    image->format = rb->Format;
 196    image->data_type = rb->DataType;
 197    image->data = loaderPrivate;
 198    intel_region_reference(&image->region, irb->region);
 199
 200    return image;
 201 }
 202
 203 static void
 204 intel_destroy_image(__DRIimage *image)
 205 {
 206     intel_region_release(&image->region);
 207     FREE(image);
 208 }
 209
 210 static __DRIimage *
 211 intel_create_image(__DRIscreen *screen,
 212                    int width, int height, int format,
 213                    unsigned int use,
 214                    void *loaderPrivate)
 215 {
 216    __DRIimage *image;
 217    struct intel_screen *intelScreen = screen->private;
 218    int cpp;
 219
 220    image = CALLOC(sizeof *image);
 221    if (image == NULL)
 222       return NULL;
 223
 224    switch (format) {
 225    case __DRI_IMAGE_FORMAT_RGB565:
 226       image->format = MESA_FORMAT_RGB565;
 227       image->internal_format = GL_RGB;
 228       image->data_type = GL_UNSIGNED_BYTE;
 229       break;
 230    case __DRI_IMAGE_FORMAT_XRGB8888:
 231       image->format = MESA_FORMAT_XRGB8888;
 232       image->internal_format = GL_RGB;
 233       image->data_type = GL_UNSIGNED_BYTE;
 234       break;
 235    case __DRI_IMAGE_FORMAT_ARGB8888:
 236       image->format = MESA_FORMAT_ARGB8888;
 237       image->internal_format = GL_RGBA;
 238       image->data_type = GL_UNSIGNED_BYTE;
 239       break;
 240    default:
 241       free(image);
 242       return NULL;
 243    }
 244
 245    image->data = loaderPrivate;
 246    cpp = _mesa_get_format_bytes(image->format);
 247
 248    image->region =
 249       intel_region_alloc(intelScreen, I915_TILING_NONE,
 250                          cpp, width, height, GL_TRUE);
 251    if (image->region == NULL) {
 252       FREE(image);
 253       return NULL;
 254    }
 255
 256    return image;
 257 }
 258
 259 static GLboolean
 260 intel_query_image(__DRIimage *image, int attrib, int *value)
 261 {
 262    switch (attrib) {
 263    case __DRI_IMAGE_ATTRIB_STRIDE:
 264       *value = image->region->pitch * image->region->cpp;
 265       return GL_TRUE;
 266    case __DRI_IMAGE_ATTRIB_HANDLE:
 267       *value = image->region->buffer->handle;
 268       return GL_TRUE;
 269    case __DRI_IMAGE_ATTRIB_NAME:
 270       return intel_region_flink(image->region, (uint32_t *) value);
 271    default:
 272       return GL_FALSE;
 273    }
 274 }
 275
 276 static struct __DRIimageExtensionRec intelImageExtension = {
 277     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 278     intel_create_image_from_name,
 279     intel_create_image_from_renderbuffer,
 280     intel_destroy_image,
 281     intel_create_image,
 282     intel_query_image
 283 };
 284
 285 static const __DRIextension *intelScreenExtensions[] = {
 286     &driReadDrawableExtension,
 287     &intelTexBufferExtension.base,
 288     &intelFlushExtension.base,
 289     &intelImageExtension.base,
 290     &dri2ConfigQueryExtension.base,
 291     NULL
 292 };
 293
 294 static GLboolean
 295 intel_get_param(__DRIscreen *psp, int param, int *value)
 296 {
 297    int ret;
 298    struct drm_i915_getparam gp;
 299
 300    gp.param = param;
 301    gp.value = value;
 302
 303    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 304    if (ret) {
 305       _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 306       return GL_FALSE;
 307    }
 308
 309    return GL_TRUE;
 310 }
 311
 312 static void
 313 nop_callback(GLuint key, void *data, void *userData)
 314 {
 315 }
 316
 317 static void
 318 intelDestroyScreen(__DRIscreen * sPriv)
 319 {
 320    struct intel_screen *intelScreen = sPriv->private;
 321
 322    dri_bufmgr_destroy(intelScreen->bufmgr);
 323    driDestroyOptionInfo(&intelScreen->optionCache);
 324
 325    /* Some regions may still have references to them at this point, so
 326     * flush the hash table to prevent _mesa_DeleteHashTable() from
 327     * complaining about the hash not being empty; */
 328    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 329    _mesa_DeleteHashTable(intelScreen->named_regions);
 330
 331    FREE(intelScreen);
 332    sPriv->private = NULL;
 333 }
 334
 335
 336 /**
 337  * This is called when we need to set up GL rendering to a new X window.
 338  */
 339 static GLboolean
 340 intelCreateBuffer(__DRIscreen * driScrnPriv,
 341                   __DRIdrawable * driDrawPriv,
 342                   const struct gl_config * mesaVis, GLboolean isPixmap)
 343 {
 344    struct intel_renderbuffer *rb;
 345
 346    if (isPixmap) {
 347       return GL_FALSE;          /* not implemented */
 348    }
 349    else {
 350       GLboolean swStencil = (mesaVis->stencilBits > 0 &&
 351                              mesaVis->depthBits != 24);
 352       gl_format rgbFormat;
 353
 354       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 355
 356       if (!fb)
 357          return GL_FALSE;
 358
 359       _mesa_initialize_window_framebuffer(fb, mesaVis);
 360
 361       if (mesaVis->redBits == 5)
 362          rgbFormat = MESA_FORMAT_RGB565;
 363       else if (mesaVis->alphaBits == 0)
 364          rgbFormat = MESA_FORMAT_XRGB8888;
 365       else
 366          rgbFormat = MESA_FORMAT_ARGB8888;
 367
 368       /* setup the hardware-based renderbuffers */
 369       rb = intel_create_renderbuffer(rgbFormat);
 370       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 371
 372       if (mesaVis->doubleBufferMode) {
 373          rb = intel_create_renderbuffer(rgbFormat);
 374          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 375       }
 376
 377       if (mesaVis->depthBits == 24) {
 378          assert(mesaVis->stencilBits == 8);
 379          /* combined depth/stencil buffer */
 380          struct intel_renderbuffer *depthStencilRb
 381             = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 382          /* note: bind RB to two attachment points */
 383          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthStencilRb->Base);
 384          _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &depthStencilRb->Base);
 385       }
 386       else if (mesaVis->depthBits == 16) {
 387          /* just 16-bit depth buffer, no hw stencil */
 388          struct intel_renderbuffer *depthRb
 389             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 390          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 391       }
 392
 393       /* now add any/all software-based renderbuffers we may need */
 394       _mesa_add_soft_renderbuffers(fb,
 395                                    GL_FALSE, /* never sw color */
 396                                    GL_FALSE, /* never sw depth */
 397                                    swStencil, mesaVis->accumRedBits > 0,
 398                                    GL_FALSE, /* never sw alpha */
 399                                    GL_FALSE  /* never sw aux */ );
 400       driDrawPriv->driverPrivate = fb;
 401
 402       return GL_TRUE;
 403    }
 404 }
 405
 406 static void
 407 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 408 {
 409     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 410
 411     _mesa_reference_framebuffer(&fb, NULL);
 412 }
 413
 414 /* There are probably better ways to do this, such as an
 415  * init-designated function to register chipids and createcontext
 416  * functions.
 417  */
 418 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 419                                    __DRIcontext * driContextPriv,
 420                                    void *sharedContextPrivate);
 421
 422 extern GLboolean i915CreateContext(int api,
 423                                    const struct gl_config * mesaVis,
 424                                    __DRIcontext * driContextPriv,
 425                                    void *sharedContextPrivate);
 426 extern GLboolean brwCreateContext(int api,
 427                                   const struct gl_config * mesaVis,
 428                                   __DRIcontext * driContextPriv,
 429                                   void *sharedContextPrivate);
 430
 431 static GLboolean
 432 intelCreateContext(gl_api api,
 433                    const struct gl_config * mesaVis,
 434                    __DRIcontext * driContextPriv,
 435                    void *sharedContextPrivate)
 436 {
 437    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 438    struct intel_screen *intelScreen = sPriv->private;
 439
 440 #ifdef I915
 441    if (IS_9XX(intelScreen->deviceID)) {
 442       if (!IS_965(intelScreen->deviceID)) {
 443          return i915CreateContext(api, mesaVis, driContextPriv,
 444                                   sharedContextPrivate);
 445       }
 446    } else {
 447       intelScreen->no_vbo = GL_TRUE;
 448       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 449    }
 450 #else
 451    if (IS_965(intelScreen->deviceID))
 452       return brwCreateContext(api, mesaVis,
 453                               driContextPriv, sharedContextPrivate);
 454 #endif
 455    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 456    return GL_FALSE;
 457 }
 458
 459 static GLboolean
 460 intel_init_bufmgr(struct intel_screen *intelScreen)
 461 {
 462    __DRIscreen *spriv = intelScreen->driScrnPriv;
 463    int num_fences = 0;
 464
 465    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 466                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 467
 468    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 469    if (intelScreen->bufmgr == NULL) {
 470       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 471               __func__, __LINE__);
 472       return GL_FALSE;
 473    }
 474
 475    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 476        num_fences == 0) {
 477       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 478       return GL_FALSE;
 479    }
 480
 481    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 482
 483    intelScreen->named_regions = _mesa_NewHashTable();
 484
 485    return GL_TRUE;
 486 }
 487
 488 /**
 489  * This is the driver specific part of the createNewScreen entry point.
 490  * Called when using DRI2.
 491  *
 492  * \return the struct gl_config supported by this driver
 493  */
 494 static const
 495 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 496 {
 497    struct intel_screen *intelScreen;
 498    GLenum fb_format[3];
 499    GLenum fb_type[3];
 500    unsigned int api_mask;
 501    char *devid_override;
 502
 503    static const GLenum back_buffer_modes[] = {
 504        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 505    };
 506    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 507    int color;
 508    __DRIconfig **configs = NULL;
 509
 510    /* Allocate the private area */
 511    intelScreen = CALLOC(sizeof *intelScreen);
 512    if (!intelScreen) {
 513       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 514       return GL_FALSE;
 515    }
 516    /* parse information in __driConfigOptions */
 517    driParseOptionInfo(&intelScreen->optionCache,
 518                       __driConfigOptions, __driNConfigOptions);
 519
 520    intelScreen->driScrnPriv = psp;
 521    psp->private = (void *) intelScreen;
 522
 523    /* Determine chipset ID */
 524    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 525                         &intelScreen->deviceID))
 526       return GL_FALSE;
 527
 528    /* Allow an override of the device ID for the purpose of making the
 529     * driver produce dumps for debugging of new chipset enablement.
 530     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 531     * incorrectly.
 532     */
 533    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 534    if (devid_override) {
 535       intelScreen->deviceID = strtod(devid_override, NULL);
 536    }
 537
 538    api_mask = (1 << __DRI_API_OPENGL);
 539 #if FEATURE_ES1
 540    api_mask |= (1 << __DRI_API_GLES);
 541 #endif
 542 #if FEATURE_ES2
 543    api_mask |= (1 << __DRI_API_GLES2);
 544 #endif
 545
 546    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 547       psp->api_mask = api_mask;
 548
 549    if (!intel_init_bufmgr(intelScreen))
 550        return GL_FALSE;
 551
 552    psp->extensions = intelScreenExtensions;
 553
 554    msaa_samples_array[0] = 0;
 555
 556    fb_format[0] = GL_RGB;
 557    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 558
 559    fb_format[1] = GL_BGR;
 560    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 561
 562    fb_format[2] = GL_BGRA;
 563    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 564
 565    depth_bits[0] = 0;
 566    stencil_bits[0] = 0;
 567
 568    /* Generate a rich set of useful configs that do not include an
 569     * accumulation buffer.
 570     */
 571    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 572       __DRIconfig **new_configs;
 573       int depth_factor;
 574
 575       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 576        * buffer that has a diffferent number of bits per pixel than the color
 577        * buffer.  This isn't yet supported here.
 578        */
 579       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 580          depth_bits[1] = 16;
 581          stencil_bits[1] = 0;
 582       } else {
 583          depth_bits[1] = 24;
 584          stencil_bits[1] = 8;
 585       }
 586
 587       depth_factor = 2;
 588
 589       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 590                                      depth_bits,
 591                                      stencil_bits,
 592                                      depth_factor,
 593                                      back_buffer_modes,
 594                                      ARRAY_SIZE(back_buffer_modes),
 595                                      msaa_samples_array,
 596                                      ARRAY_SIZE(msaa_samples_array),
 597                                      GL_FALSE);
 598       if (configs == NULL)
 599          configs = new_configs;
 600       else
 601          configs = driConcatConfigs(configs, new_configs);
 602    }
 603
 604    /* Generate the minimum possible set of configs that include an
 605     * accumulation buffer.
 606     */
 607    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 608       __DRIconfig **new_configs;
 609
 610       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 611          depth_bits[0] = 16;
 612          stencil_bits[0] = 0;
 613       } else {
 614          depth_bits[0] = 24;
 615          stencil_bits[0] = 8;
 616       }
 617
 618       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 619                                      depth_bits, stencil_bits, 1,
 620                                      back_buffer_modes + 1, 1,
 621                                      msaa_samples_array, 1,
 622                                      GL_TRUE);
 623       if (configs == NULL)
 624          configs = new_configs;
 625       else
 626          configs = driConcatConfigs(configs, new_configs);
 627    }
 628
 629    if (configs == NULL) {
 630       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 631               __LINE__);
 632       return NULL;
 633    }
 634
 635    return (const __DRIconfig **)configs;
 636 }
 637
 638 struct intel_buffer {
 639    __DRIbuffer base;
 640    struct intel_region *region;
 641 };
 642
 643 static __DRIbuffer *
 644 intelAllocateBuffer(__DRIscreen *screen,
 645                     unsigned attachment, unsigned format,
 646                     int width, int height)
 647 {
 648    struct intel_buffer *intelBuffer;
 649    struct intel_screen *intelScreen = screen->private;
 650
 651    intelBuffer = CALLOC(sizeof *intelBuffer);
 652    if (intelBuffer == NULL)
 653       return NULL;
 654
 655    intelBuffer->region = intel_region_alloc(intelScreen, I915_TILING_NONE,
 656                                             format / 8, width, height, GL_TRUE);
 657
 658    if (intelBuffer->region == NULL) {
 659            FREE(intelBuffer);
 660            return NULL;
 661    }
 662
 663    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 664
 665    intelBuffer->base.attachment = attachment;
 666    intelBuffer->base.cpp = intelBuffer->region->cpp;
 667    intelBuffer->base.pitch =
 668          intelBuffer->region->pitch * intelBuffer->region->cpp;
 669
 670    return &intelBuffer->base;
 671 }
 672
 673 static void
 674 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 675 {
 676    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 677
 678    intel_region_release(&intelBuffer->region);
 679    free(intelBuffer);
 680 }
 681
 682
 683 const struct __DriverAPIRec driDriverAPI = {
 684    .DestroyScreen        = intelDestroyScreen,
 685    .CreateContext        = intelCreateContext,
 686    .DestroyContext       = intelDestroyContext,
 687    .CreateBuffer         = intelCreateBuffer,
 688    .DestroyBuffer        = intelDestroyBuffer,
 689    .MakeCurrent          = intelMakeCurrent,
 690    .UnbindContext        = intelUnbindContext,
 691    .InitScreen2          = intelInitScreen2,
 692    .AllocateBuffer       = intelAllocateBuffer,
 693    .ReleaseBuffer        = intelReleaseBuffer
 694 };
 695
 696 /* This is the table of extensions that the loader will dlsym() for. */
 697 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 698     &driCoreExtension.base,
 699     &driDRI2Extension.base,
 700     NULL
 701 };