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

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <errno.h>
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/framebuffer.h"
  32 #include "main/renderbuffer.h"
  33 #include "main/hash.h"
  34 #include "main/fbobject.h"
  35 #include "main/mfeatures.h"
  36
  37 #include "utils.h"
  38 #include "xmlpool.h"
  39
  40 PUBLIC const char __driConfigOptions[] =
  41    DRI_CONF_BEGIN
  42    DRI_CONF_SECTION_PERFORMANCE
  43       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  44       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  45        * DRI_CONF_BO_REUSE_ALL
  46        */
  47       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  48          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  49             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  50             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  51          DRI_CONF_DESC_END
  52       DRI_CONF_OPT_END
  53
  54       DRI_CONF_OPT_BEGIN(texture_tiling, bool, true)
  55          DRI_CONF_DESC(en, "Enable texture tiling")
  56       DRI_CONF_OPT_END
  57
  58       DRI_CONF_OPT_BEGIN(early_z, bool, false)
  59          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  60       DRI_CONF_OPT_END
  61
  62       DRI_CONF_OPT_BEGIN(fragment_shader, bool, true)
  63          DRI_CONF_DESC(en, "Enable limited ARB_fragment_shader support on 915/945.")
  64       DRI_CONF_OPT_END
  65
  66    DRI_CONF_SECTION_END
  67    DRI_CONF_SECTION_QUALITY
  68       DRI_CONF_FORCE_S3TC_ENABLE(false)
  69       DRI_CONF_ALLOW_LARGE_TEXTURES(2)
  70    DRI_CONF_SECTION_END
  71    DRI_CONF_SECTION_DEBUG
  72      DRI_CONF_NO_RAST(false)
  73      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
  74      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
  75
  76       DRI_CONF_OPT_BEGIN(stub_occlusion_query, bool, false)
  77          DRI_CONF_DESC(en, "Enable stub ARB_occlusion_query support on 915/945.")
  78       DRI_CONF_OPT_END
  79    DRI_CONF_SECTION_END
  80 DRI_CONF_END;
  81
  82 const GLuint __driNConfigOptions = 11;
  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_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 static const __DRItexBufferExtension intelTexBufferExtension = {
 100     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
 101    intelSetTexBuffer,
 102    intelSetTexBuffer2,
 103 };
 104
 105 static void
 106 intelDRI2Flush(__DRIdrawable *drawable)
 107 {
 108    GET_CURRENT_CONTEXT(ctx);
 109    struct intel_context *intel = intel_context(ctx);
 110
 111    if (intel->gen < 4)
 112       INTEL_FIREVERTICES(intel);
 113
 114    intel->need_throttle = GL_TRUE;
 115
 116    if (intel->batch.used)
 117       intel_batchbuffer_flush(intel);
 118 }
 119
 120 static const struct __DRI2flushExtensionRec intelFlushExtension = {
 121     { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
 122     intelDRI2Flush,
 123     dri2InvalidateDrawable,
 124 };
 125
 126 static __DRIimage *
 127 intel_create_image_from_name(__DRIscreen *screen,
 128                              int width, int height, int format,
 129                              int name, int pitch, void *loaderPrivate)
 130 {
 131     struct intel_screen *intelScreen = screen->private;
 132     __DRIimage *image;
 133     int cpp;
 134
 135     image = CALLOC(sizeof *image);
 136     if (image == NULL)
 137         return NULL;
 138
 139     switch (format) {
 140     case __DRI_IMAGE_FORMAT_RGB565:
 141        image->format = MESA_FORMAT_RGB565;
 142        image->internal_format = GL_RGB;
 143        image->data_type = GL_UNSIGNED_BYTE;
 144        break;
 145     case __DRI_IMAGE_FORMAT_XRGB8888:
 146        image->format = MESA_FORMAT_XRGB8888;
 147        image->internal_format = GL_RGB;
 148        image->data_type = GL_UNSIGNED_BYTE;
 149        break;
 150     case __DRI_IMAGE_FORMAT_ARGB8888:
 151        image->format = MESA_FORMAT_ARGB8888;
 152        image->internal_format = GL_RGBA;
 153        image->data_type = GL_UNSIGNED_BYTE;
 154        break;
 155     case __DRI_IMAGE_FORMAT_ABGR8888:
 156        image->format = MESA_FORMAT_RGBA8888_REV;
 157        image->internal_format = GL_RGBA;
 158        image->data_type = GL_UNSIGNED_BYTE;
 159        break;
 160     default:
 161        free(image);
 162        return NULL;
 163     }
 164
 165     image->data = loaderPrivate;
 166     cpp = _mesa_get_format_bytes(image->format);
 167
 168     image->region = intel_region_alloc_for_handle(intelScreen,
 169                                                   cpp, width, height,
 170                                                   pitch, name, "image");
 171     if (image->region == NULL) {
 172        FREE(image);
 173        return NULL;
 174     }
 175
 176     return image;
 177 }
 178
 179 static __DRIimage *
 180 intel_create_image_from_renderbuffer(__DRIcontext *context,
 181                                      int renderbuffer, void *loaderPrivate)
 182 {
 183    __DRIimage *image;
 184    struct intel_context *intel = context->driverPrivate;
 185    struct gl_renderbuffer *rb;
 186    struct intel_renderbuffer *irb;
 187
 188    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
 189    if (!rb) {
 190       _mesa_error(&intel->ctx,
 191                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
 192       return NULL;
 193    }
 194
 195    irb = intel_renderbuffer(rb);
 196    image = CALLOC(sizeof *image);
 197    if (image == NULL)
 198       return NULL;
 199
 200    image->internal_format = rb->InternalFormat;
 201    image->format = rb->Format;
 202    image->data_type = rb->DataType;
 203    image->data = loaderPrivate;
 204    intel_region_reference(&image->region, irb->region);
 205
 206    return image;
 207 }
 208
 209 static void
 210 intel_destroy_image(__DRIimage *image)
 211 {
 212     intel_region_release(&image->region);
 213     FREE(image);
 214 }
 215
 216 static __DRIimage *
 217 intel_create_image(__DRIscreen *screen,
 218                    int width, int height, int format,
 219                    unsigned int use,
 220                    void *loaderPrivate)
 221 {
 222    __DRIimage *image;
 223    struct intel_screen *intelScreen = screen->private;
 224    uint32_t tiling;
 225    int cpp;
 226
 227    tiling = I915_TILING_X;
 228    if (use & __DRI_IMAGE_USE_CURSOR) {
 229       if (width != 64 || height != 64)
 230          return NULL;
 231       tiling = I915_TILING_NONE;
 232    }
 233
 234    image = CALLOC(sizeof *image);
 235    if (image == NULL)
 236       return NULL;
 237
 238    switch (format) {
 239    case __DRI_IMAGE_FORMAT_RGB565:
 240       image->format = MESA_FORMAT_RGB565;
 241       image->internal_format = GL_RGB;
 242       image->data_type = GL_UNSIGNED_BYTE;
 243       break;
 244    case __DRI_IMAGE_FORMAT_XRGB8888:
 245       image->format = MESA_FORMAT_XRGB8888;
 246       image->internal_format = GL_RGB;
 247       image->data_type = GL_UNSIGNED_BYTE;
 248       break;
 249    case __DRI_IMAGE_FORMAT_ARGB8888:
 250       image->format = MESA_FORMAT_ARGB8888;
 251       image->internal_format = GL_RGBA;
 252       image->data_type = GL_UNSIGNED_BYTE;
 253       break;
 254     case __DRI_IMAGE_FORMAT_ABGR8888:
 255        image->format = MESA_FORMAT_RGBA8888_REV;
 256        image->internal_format = GL_RGBA;
 257        image->data_type = GL_UNSIGNED_BYTE;
 258        break;
 259    default:
 260       free(image);
 261       return NULL;
 262    }
 263
 264    image->data = loaderPrivate;
 265    cpp = _mesa_get_format_bytes(image->format);
 266
 267    image->region =
 268       intel_region_alloc(intelScreen, tiling,
 269                          cpp, width, height, GL_TRUE);
 270    if (image->region == NULL) {
 271       FREE(image);
 272       return NULL;
 273    }
 274
 275    return image;
 276 }
 277
 278 static GLboolean
 279 intel_query_image(__DRIimage *image, int attrib, int *value)
 280 {
 281    switch (attrib) {
 282    case __DRI_IMAGE_ATTRIB_STRIDE:
 283       *value = image->region->pitch * image->region->cpp;
 284       return GL_TRUE;
 285    case __DRI_IMAGE_ATTRIB_HANDLE:
 286       *value = image->region->buffer->handle;
 287       return GL_TRUE;
 288    case __DRI_IMAGE_ATTRIB_NAME:
 289       return intel_region_flink(image->region, (uint32_t *) value);
 290    default:
 291       return GL_FALSE;
 292    }
 293 }
 294
 295 static __DRIimage *
 296 intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
 297 {
 298    __DRIimage *image;
 299
 300    image = CALLOC(sizeof *image);
 301    if (image == NULL)
 302       return NULL;
 303
 304    intel_region_reference(&image->region, orig_image->region);
 305    if (image->region == NULL) {
 306       FREE(image);
 307       return NULL;
 308    }
 309
 310    image->internal_format = orig_image->internal_format;
 311    image->format          = orig_image->format;
 312    image->data_type       = orig_image->data_type;
 313    image->data            = loaderPrivate;
 314
 315    return image;
 316 }
 317
 318 static struct __DRIimageExtensionRec intelImageExtension = {
 319     { __DRI_IMAGE, __DRI_IMAGE_VERSION },
 320     intel_create_image_from_name,
 321     intel_create_image_from_renderbuffer,
 322     intel_destroy_image,
 323     intel_create_image,
 324     intel_query_image,
 325     intel_dup_image
 326 };
 327
 328 static const __DRIextension *intelScreenExtensions[] = {
 329     &driReadDrawableExtension,
 330     &intelTexBufferExtension.base,
 331     &intelFlushExtension.base,
 332     &intelImageExtension.base,
 333     &dri2ConfigQueryExtension.base,
 334     NULL
 335 };
 336
 337 static GLboolean
 338 intel_get_param(__DRIscreen *psp, int param, int *value)
 339 {
 340    int ret;
 341    struct drm_i915_getparam gp;
 342
 343    gp.param = param;
 344    gp.value = value;
 345
 346    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
 347    if (ret) {
 348       if (ret != -EINVAL)
 349          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
 350       return GL_FALSE;
 351    }
 352
 353    return GL_TRUE;
 354 }
 355
 356 static GLboolean
 357 intel_get_boolean(__DRIscreen *psp, int param)
 358 {
 359    int value = 0;
 360    return intel_get_param(psp, param, &value) && value;
 361 }
 362
 363 static void
 364 nop_callback(GLuint key, void *data, void *userData)
 365 {
 366 }
 367
 368 static void
 369 intelDestroyScreen(__DRIscreen * sPriv)
 370 {
 371    struct intel_screen *intelScreen = sPriv->private;
 372
 373    dri_bufmgr_destroy(intelScreen->bufmgr);
 374    driDestroyOptionInfo(&intelScreen->optionCache);
 375
 376    /* Some regions may still have references to them at this point, so
 377     * flush the hash table to prevent _mesa_DeleteHashTable() from
 378     * complaining about the hash not being empty; */
 379    _mesa_HashDeleteAll(intelScreen->named_regions, nop_callback, NULL);
 380    _mesa_DeleteHashTable(intelScreen->named_regions);
 381
 382    FREE(intelScreen);
 383    sPriv->private = NULL;
 384 }
 385
 386
 387 /**
 388  * This is called when we need to set up GL rendering to a new X window.
 389  */
 390 static GLboolean
 391 intelCreateBuffer(__DRIscreen * driScrnPriv,
 392                   __DRIdrawable * driDrawPriv,
 393                   const struct gl_config * mesaVis, GLboolean isPixmap)
 394 {
 395    struct intel_renderbuffer *rb;
 396    struct intel_screen *screen = (struct intel_screen*) driScrnPriv->private;
 397
 398    if (isPixmap) {
 399       return GL_FALSE;          /* not implemented */
 400    }
 401    else {
 402       gl_format rgbFormat;
 403
 404       struct gl_framebuffer *fb = CALLOC_STRUCT(gl_framebuffer);
 405
 406       if (!fb)
 407          return GL_FALSE;
 408
 409       _mesa_initialize_window_framebuffer(fb, mesaVis);
 410
 411       if (mesaVis->redBits == 5)
 412          rgbFormat = MESA_FORMAT_RGB565;
 413       else if (mesaVis->alphaBits == 0)
 414          rgbFormat = MESA_FORMAT_XRGB8888;
 415       else
 416          rgbFormat = MESA_FORMAT_ARGB8888;
 417
 418       /* setup the hardware-based renderbuffers */
 419       rb = intel_create_renderbuffer(rgbFormat);
 420       _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base);
 421
 422       if (mesaVis->doubleBufferMode) {
 423          rb = intel_create_renderbuffer(rgbFormat);
 424          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base);
 425       }
 426
 427       /*
 428        * Assert here that the gl_config has an expected depth/stencil bit
 429        * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
 430        * which constructs the advertised configs.)
 431        */
 432       if (mesaVis->depthBits == 24) {
 433          assert(mesaVis->stencilBits == 8);
 434
 435          if (screen->hw_has_separate_stencil
 436              && screen->dri2_has_hiz != INTEL_DRI2_HAS_HIZ_FALSE) {
 437             /*
 438              * Request a separate stencil buffer even if we do not yet know if
 439              * the screen supports it. (See comments for
 440              * enum intel_dri2_has_hiz).
 441              */
 442             rb = intel_create_renderbuffer(MESA_FORMAT_X8_Z24);
 443             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 444             rb = intel_create_renderbuffer(MESA_FORMAT_S8);
 445             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 446          } else {
 447             /*
 448              * Use combined depth/stencil. Note that the renderbuffer is
 449              * attached to two attachment points.
 450              */
 451             rb = intel_create_renderbuffer(MESA_FORMAT_S8_Z24);
 452             _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base);
 453             _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base);
 454          }
 455       }
 456       else if (mesaVis->depthBits == 16) {
 457          assert(mesaVis->stencilBits == 0);
 458          /* just 16-bit depth buffer, no hw stencil */
 459          struct intel_renderbuffer *depthRb
 460             = intel_create_renderbuffer(MESA_FORMAT_Z16);
 461          _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
 462       }
 463       else {
 464          assert(mesaVis->depthBits == 0);
 465          assert(mesaVis->stencilBits == 0);
 466       }
 467
 468       /* now add any/all software-based renderbuffers we may need */
 469       _mesa_add_soft_renderbuffers(fb,
 470                                    GL_FALSE, /* never sw color */
 471                                    GL_FALSE, /* never sw depth */
 472                                    GL_FALSE, /* never sw stencil */
 473                                    mesaVis->accumRedBits > 0,
 474                                    GL_FALSE, /* never sw alpha */
 475                                    GL_FALSE  /* never sw aux */ );
 476       driDrawPriv->driverPrivate = fb;
 477
 478       return GL_TRUE;
 479    }
 480 }
 481
 482 static void
 483 intelDestroyBuffer(__DRIdrawable * driDrawPriv)
 484 {
 485     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
 486
 487     _mesa_reference_framebuffer(&fb, NULL);
 488 }
 489
 490 /* There are probably better ways to do this, such as an
 491  * init-designated function to register chipids and createcontext
 492  * functions.
 493  */
 494 extern GLboolean i830CreateContext(const struct gl_config * mesaVis,
 495                                    __DRIcontext * driContextPriv,
 496                                    void *sharedContextPrivate);
 497
 498 extern GLboolean i915CreateContext(int api,
 499                                    const struct gl_config * mesaVis,
 500                                    __DRIcontext * driContextPriv,
 501                                    void *sharedContextPrivate);
 502 extern GLboolean brwCreateContext(int api,
 503                                   const struct gl_config * mesaVis,
 504                                   __DRIcontext * driContextPriv,
 505                                   void *sharedContextPrivate);
 506
 507 static GLboolean
 508 intelCreateContext(gl_api api,
 509                    const struct gl_config * mesaVis,
 510                    __DRIcontext * driContextPriv,
 511                    void *sharedContextPrivate)
 512 {
 513    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
 514    struct intel_screen *intelScreen = sPriv->private;
 515
 516 #ifdef I915
 517    if (IS_9XX(intelScreen->deviceID)) {
 518       if (!IS_965(intelScreen->deviceID)) {
 519          return i915CreateContext(api, mesaVis, driContextPriv,
 520                                   sharedContextPrivate);
 521       }
 522    } else {
 523       intelScreen->no_vbo = GL_TRUE;
 524       return i830CreateContext(mesaVis, driContextPriv, sharedContextPrivate);
 525    }
 526 #else
 527    if (IS_965(intelScreen->deviceID))
 528       return brwCreateContext(api, mesaVis,
 529                               driContextPriv, sharedContextPrivate);
 530 #endif
 531    fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
 532    return GL_FALSE;
 533 }
 534
 535 static GLboolean
 536 intel_init_bufmgr(struct intel_screen *intelScreen)
 537 {
 538    __DRIscreen *spriv = intelScreen->driScrnPriv;
 539    int num_fences = 0;
 540
 541    intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
 542                          getenv("INTEL_DEVID_OVERRIDE") != NULL);
 543
 544    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
 545    if (intelScreen->bufmgr == NULL) {
 546       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
 547               __func__, __LINE__);
 548       return GL_FALSE;
 549    }
 550
 551    if (!intel_get_param(spriv, I915_PARAM_NUM_FENCES_AVAIL, &num_fences) ||
 552        num_fences == 0) {
 553       fprintf(stderr, "[%s: %u] Kernel 2.6.29 required.\n", __func__, __LINE__);
 554       return GL_FALSE;
 555    }
 556
 557    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
 558
 559    intelScreen->named_regions = _mesa_NewHashTable();
 560
 561    intelScreen->relaxed_relocations = 0;
 562    intelScreen->relaxed_relocations |=
 563       intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA) << 0;
 564
 565    return GL_TRUE;
 566 }
 567
 568 /**
 569  * Override intel_screen.hw_has_hiz with environment variable INTEL_HIZ.
 570  *
 571  * Valid values for INTEL_HIZ are "0" and "1". If an invalid valid value is
 572  * encountered, a warning is emitted and INTEL_HIZ is ignored.
 573  */
 574 static void
 575 intel_override_hiz(struct intel_screen *intel)
 576 {
 577    const char *s = getenv("INTEL_HIZ");
 578    if (!s) {
 579       return;
 580    } else if (!strncmp("0", s, 2)) {
 581       intel->hw_has_hiz = false;
 582    } else if (!strncmp("1", s, 2)) {
 583       intel->hw_has_hiz = true;
 584    } else {
 585       fprintf(stderr,
 586               "warning: env variable INTEL_HIZ=\"%s\" has invalid value "
 587               "and is ignored", s);
 588    }
 589 }
 590
 591 /**
 592  * Override intel_screen.hw_has_separate_stencil with environment variable
 593  * INTEL_SEPARATE_STENCIL.
 594  *
 595  * Valid values for INTEL_SEPARATE_STENCIL are "0" and "1". If an invalid
 596  * valid value is encountered, a warning is emitted and INTEL_SEPARATE_STENCIL
 597  * is ignored.
 598  */
 599 static void
 600 intel_override_separate_stencil(struct intel_screen *screen)
 601 {
 602    const char *s = getenv("INTEL_SEPARATE_STENCIL");
 603    if (!s) {
 604       return;
 605    } else if (!strncmp("0", s, 2)) {
 606       screen->hw_has_separate_stencil = false;
 607    } else if (!strncmp("1", s, 2)) {
 608       screen->hw_has_separate_stencil = true;
 609    } else {
 610       fprintf(stderr,
 611               "warning: env variable INTEL_SEPARATE_STENCIL=\"%s\" has "
 612               "invalid value and is ignored", s);
 613    }
 614 }
 615
 616 /**
 617  * This is the driver specific part of the createNewScreen entry point.
 618  * Called when using DRI2.
 619  *
 620  * \return the struct gl_config supported by this driver
 621  */
 622 static const
 623 __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 624 {
 625    struct intel_screen *intelScreen;
 626    GLenum fb_format[3];
 627    GLenum fb_type[3];
 628    unsigned int api_mask;
 629    char *devid_override;
 630
 631    static const GLenum back_buffer_modes[] = {
 632        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
 633    };
 634    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
 635    int color;
 636    __DRIconfig **configs = NULL;
 637
 638    /* Allocate the private area */
 639    intelScreen = CALLOC(sizeof *intelScreen);
 640    if (!intelScreen) {
 641       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
 642       return GL_FALSE;
 643    }
 644    /* parse information in __driConfigOptions */
 645    driParseOptionInfo(&intelScreen->optionCache,
 646                       __driConfigOptions, __driNConfigOptions);
 647
 648    intelScreen->driScrnPriv = psp;
 649    psp->private = (void *) intelScreen;
 650
 651    /* Determine chipset ID */
 652    if (!intel_get_param(psp, I915_PARAM_CHIPSET_ID,
 653                         &intelScreen->deviceID))
 654       return GL_FALSE;
 655
 656    /* Allow an override of the device ID for the purpose of making the
 657     * driver produce dumps for debugging of new chipset enablement.
 658     * This implies INTEL_NO_HW, to avoid programming your actual GPU
 659     * incorrectly.
 660     */
 661    devid_override = getenv("INTEL_DEVID_OVERRIDE");
 662    if (devid_override) {
 663       intelScreen->deviceID = strtod(devid_override, NULL);
 664    }
 665
 666    if (IS_GEN7(intelScreen->deviceID)) {
 667       intelScreen->gen = 7;
 668    } else if (IS_GEN6(intelScreen->deviceID)) {
 669       intelScreen->gen = 6;
 670    } else if (IS_GEN5(intelScreen->deviceID)) {
 671       intelScreen->gen = 5;
 672    } else if (IS_965(intelScreen->deviceID)) {
 673       intelScreen->gen = 4;
 674    } else if (IS_9XX(intelScreen->deviceID)) {
 675       intelScreen->gen = 3;
 676    } else {
 677       intelScreen->gen = 2;
 678    }
 679
 680    /*
 681     * FIXME: The hiz and separate stencil fields need updating once the
 682     * FIXME: features are completely implemented for a given chipset.
 683     */
 684    intelScreen->hw_has_separate_stencil = intelScreen->gen >= 7;
 685    intelScreen->hw_must_use_separate_stencil = intelScreen->gen >= 7;
 686    intelScreen->hw_has_hiz = false;
 687    intelScreen->dri2_has_hiz = INTEL_DRI2_HAS_HIZ_UNKNOWN;
 688
 689    intel_override_hiz(intelScreen);
 690    intel_override_separate_stencil(intelScreen);
 691
 692    api_mask = (1 << __DRI_API_OPENGL);
 693 #if FEATURE_ES1
 694    api_mask |= (1 << __DRI_API_GLES);
 695 #endif
 696 #if FEATURE_ES2
 697    api_mask |= (1 << __DRI_API_GLES2);
 698 #endif
 699
 700    if (IS_9XX(intelScreen->deviceID) || IS_965(intelScreen->deviceID))
 701       psp->api_mask = api_mask;
 702
 703    if (!intel_init_bufmgr(intelScreen))
 704        return GL_FALSE;
 705
 706    psp->extensions = intelScreenExtensions;
 707
 708    msaa_samples_array[0] = 0;
 709
 710    fb_format[0] = GL_RGB;
 711    fb_type[0] = GL_UNSIGNED_SHORT_5_6_5;
 712
 713    fb_format[1] = GL_BGR;
 714    fb_type[1] = GL_UNSIGNED_INT_8_8_8_8_REV;
 715
 716    fb_format[2] = GL_BGRA;
 717    fb_type[2] = GL_UNSIGNED_INT_8_8_8_8_REV;
 718
 719    depth_bits[0] = 0;
 720    stencil_bits[0] = 0;
 721
 722    /* Generate a rich set of useful configs that do not include an
 723     * accumulation buffer.
 724     */
 725    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 726       __DRIconfig **new_configs;
 727       int depth_factor;
 728
 729       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
 730        * buffer that has a diffferent number of bits per pixel than the color
 731        * buffer.  This isn't yet supported here.
 732        */
 733       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 734          depth_bits[1] = 16;
 735          stencil_bits[1] = 0;
 736       } else {
 737          depth_bits[1] = 24;
 738          stencil_bits[1] = 8;
 739       }
 740
 741       depth_factor = 2;
 742
 743       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 744                                      depth_bits,
 745                                      stencil_bits,
 746                                      depth_factor,
 747                                      back_buffer_modes,
 748                                      ARRAY_SIZE(back_buffer_modes),
 749                                      msaa_samples_array,
 750                                      ARRAY_SIZE(msaa_samples_array),
 751                                      GL_FALSE);
 752       if (configs == NULL)
 753          configs = new_configs;
 754       else
 755          configs = driConcatConfigs(configs, new_configs);
 756    }
 757
 758    /* Generate the minimum possible set of configs that include an
 759     * accumulation buffer.
 760     */
 761    for (color = 0; color < ARRAY_SIZE(fb_format); color++) {
 762       __DRIconfig **new_configs;
 763
 764       if (fb_type[color] == GL_UNSIGNED_SHORT_5_6_5) {
 765          depth_bits[0] = 16;
 766          stencil_bits[0] = 0;
 767       } else {
 768          depth_bits[0] = 24;
 769          stencil_bits[0] = 8;
 770       }
 771
 772       new_configs = driCreateConfigs(fb_format[color], fb_type[color],
 773                                      depth_bits, stencil_bits, 1,
 774                                      back_buffer_modes + 1, 1,
 775                                      msaa_samples_array, 1,
 776                                      GL_TRUE);
 777       if (configs == NULL)
 778          configs = new_configs;
 779       else
 780          configs = driConcatConfigs(configs, new_configs);
 781    }
 782
 783    if (configs == NULL) {
 784       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
 785               __LINE__);
 786       return NULL;
 787    }
 788
 789    return (const __DRIconfig **)configs;
 790 }
 791
 792 struct intel_buffer {
 793    __DRIbuffer base;
 794    struct intel_region *region;
 795 };
 796
 797 static __DRIbuffer *
 798 intelAllocateBuffer(__DRIscreen *screen,
 799                     unsigned attachment, unsigned format,
 800                     int width, int height)
 801 {
 802    struct intel_buffer *intelBuffer;
 803    struct intel_screen *intelScreen = screen->private;
 804    uint32_t tiling;
 805
 806    intelBuffer = CALLOC(sizeof *intelBuffer);
 807    if (intelBuffer == NULL)
 808       return NULL;
 809
 810    if ((attachment == __DRI_BUFFER_DEPTH ||
 811         attachment == __DRI_BUFFER_STENCIL ||
 812         attachment == __DRI_BUFFER_DEPTH_STENCIL) &&
 813        intelScreen->gen >= 4)
 814       tiling = I915_TILING_Y;
 815    else
 816       tiling = I915_TILING_X;
 817
 818    intelBuffer->region = intel_region_alloc(intelScreen, tiling,
 819                                             format / 8, width, height, GL_TRUE);
 820
 821    if (intelBuffer->region == NULL) {
 822            FREE(intelBuffer);
 823            return NULL;
 824    }
 825
 826    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
 827
 828    intelBuffer->base.attachment = attachment;
 829    intelBuffer->base.cpp = intelBuffer->region->cpp;
 830    intelBuffer->base.pitch =
 831          intelBuffer->region->pitch * intelBuffer->region->cpp;
 832
 833    return &intelBuffer->base;
 834 }
 835
 836 static void
 837 intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
 838 {
 839    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
 840
 841    intel_region_release(&intelBuffer->region);
 842    free(intelBuffer);
 843 }
 844
 845
 846 const struct __DriverAPIRec driDriverAPI = {
 847    .DestroyScreen        = intelDestroyScreen,
 848    .CreateContext        = intelCreateContext,
 849    .DestroyContext       = intelDestroyContext,
 850    .CreateBuffer         = intelCreateBuffer,
 851    .DestroyBuffer        = intelDestroyBuffer,
 852    .MakeCurrent          = intelMakeCurrent,
 853    .UnbindContext        = intelUnbindContext,
 854    .InitScreen2          = intelInitScreen2,
 855    .AllocateBuffer       = intelAllocateBuffer,
 856    .ReleaseBuffer        = intelReleaseBuffer
 857 };
 858
 859 /* This is the table of extensions that the loader will dlsym() for. */
 860 PUBLIC const __DRIextension *__driDriverExtensions[] = {
 861     &driCoreExtension.base,
 862     &driDRI2Extension.base,
 863     NULL
 864 };