src/gallium/drivers/llvmpipe/lp_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   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 VMWARE 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
  29 #include "util/u_memory.h"
  30 #include "util/u_math.h"
  31 #include "util/u_cpu_detect.h"
  32 #include "util/u_format.h"
  33 #include "util/u_string.h"
  34 #include "util/u_format_s3tc.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "draw/draw_context.h"
  38 #include "gallivm/lp_bld_type.h"
  39
  40 #include "os/os_misc.h"
  41 #include "os/os_time.h"
  42 #include "lp_texture.h"
  43 #include "lp_fence.h"
  44 #include "lp_jit.h"
  45 #include "lp_screen.h"
  46 #include "lp_context.h"
  47 #include "lp_debug.h"
  48 #include "lp_public.h"
  49 #include "lp_limits.h"
  50 #include "lp_rast.h"
  51
  52 #include "state_tracker/sw_winsys.h"
  53
  54 #ifdef DEBUG
  55 int LP_DEBUG = 0;
  56
  57 static const struct debug_named_value lp_debug_flags[] = {
  58    { "pipe",   DEBUG_PIPE, NULL },
  59    { "tgsi",   DEBUG_TGSI, NULL },
  60    { "tex",    DEBUG_TEX, NULL },
  61    { "setup",  DEBUG_SETUP, NULL },
  62    { "rast",   DEBUG_RAST, NULL },
  63    { "query",  DEBUG_QUERY, NULL },
  64    { "screen", DEBUG_SCREEN, NULL },
  65    { "counters", DEBUG_COUNTERS, NULL },
  66    { "scene", DEBUG_SCENE, NULL },
  67    { "fence", DEBUG_FENCE, NULL },
  68    { "mem", DEBUG_MEM, NULL },
  69    { "fs", DEBUG_FS, NULL },
  70    DEBUG_NAMED_VALUE_END
  71 };
  72 #endif
  73
  74 int LP_PERF = 0;
  75 static const struct debug_named_value lp_perf_flags[] = {
  76    { "texmem",         PERF_TEX_MEM, NULL },
  77    { "no_mipmap",      PERF_NO_MIPMAPS, NULL },
  78    { "no_linear",      PERF_NO_LINEAR, NULL },
  79    { "no_mip_linear",  PERF_NO_MIP_LINEAR, NULL },
  80    { "no_tex",         PERF_NO_TEX, NULL },
  81    { "no_blend",       PERF_NO_BLEND, NULL },
  82    { "no_depth",       PERF_NO_DEPTH, NULL },
  83    { "no_alphatest",   PERF_NO_ALPHATEST, NULL },
  84    DEBUG_NAMED_VALUE_END
  85 };
  86
  87
  88 static const char *
  89 llvmpipe_get_vendor(struct pipe_screen *screen)
  90 {
  91    return "VMware, Inc.";
  92 }
  93
  94
  95 static const char *
  96 llvmpipe_get_name(struct pipe_screen *screen)
  97 {
  98    static char buf[100];
  99    util_snprintf(buf, sizeof(buf), "llvmpipe (LLVM %u.%u, %u bits)",
 100                  HAVE_LLVM >> 8, HAVE_LLVM & 0xff,
 101                  lp_native_vector_width );
 102    return buf;
 103 }
 104
 105
 106 static int
 107 llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 108 {
 109    switch (param) {
 110    case PIPE_CAP_NPOT_TEXTURES:
 111    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 112    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 113       return 1;
 114    case PIPE_CAP_TWO_SIDED_STENCIL:
 115       return 1;
 116    case PIPE_CAP_SM3:
 117       return 1;
 118    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 119       return 1;
 120    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 121       return PIPE_MAX_SO_BUFFERS;
 122    case PIPE_CAP_ANISOTROPIC_FILTER:
 123       return 0;
 124    case PIPE_CAP_POINT_SPRITE:
 125       return 1;
 126    case PIPE_CAP_MAX_RENDER_TARGETS:
 127       return PIPE_MAX_COLOR_BUFS;
 128    case PIPE_CAP_OCCLUSION_QUERY:
 129       return 1;
 130    case PIPE_CAP_QUERY_TIME_ELAPSED:
 131       return 0;
 132    case PIPE_CAP_QUERY_TIMESTAMP:
 133       return 1;
 134    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 135       return 0;
 136    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 137       return 1;
 138    case PIPE_CAP_TEXTURE_SHADOW_MAP:
 139       return 1;
 140    case PIPE_CAP_TEXTURE_SWIZZLE:
 141       return 1;
 142    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 143       return 0;
 144    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 145       return LP_MAX_TEXTURE_2D_LEVELS;
 146    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 147       return LP_MAX_TEXTURE_3D_LEVELS;
 148    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 149       return LP_MAX_TEXTURE_CUBE_LEVELS;
 150    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 151       return LP_MAX_TEXTURE_ARRAY_LAYERS;
 152    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 153       return 1;
 154    case PIPE_CAP_INDEP_BLEND_ENABLE:
 155       return 1;
 156    case PIPE_CAP_INDEP_BLEND_FUNC:
 157       return 1;
 158    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 159    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 160    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 161       return 1;
 162    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 163       return 0;
 164    case PIPE_CAP_PRIMITIVE_RESTART:
 165       return 1;
 166    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 167       return 1;
 168    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 169       return 1;
 170    case PIPE_CAP_TGSI_INSTANCEID:
 171    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 172    case PIPE_CAP_START_INSTANCE:
 173       return 1;
 174    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 175       return 0;
 176    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 177       return 1;
 178    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 179    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 180       return 1;
 181    /* this is a lie could support arbitrary large offsets */
 182    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 183    case PIPE_CAP_MIN_TEXEL_OFFSET:
 184       return -32;
 185    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 186    case PIPE_CAP_MAX_TEXEL_OFFSET:
 187       return 31;
 188    case PIPE_CAP_CONDITIONAL_RENDER:
 189       return 1;
 190    case PIPE_CAP_TEXTURE_BARRIER:
 191       return 0;
 192    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 193    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 194       return 16*4;
 195    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 196    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 197       return 1024;
 198    case PIPE_CAP_MAX_VERTEX_STREAMS:
 199       return 1;
 200    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 201       return 2048;
 202    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 203       return 1;
 204    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 205       return 0;
 206    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 207    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 208       return 1;
 209    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 210       return 330;
 211    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 212       return 0;
 213    case PIPE_CAP_COMPUTE:
 214       return 0;
 215    case PIPE_CAP_USER_VERTEX_BUFFERS:
 216    case PIPE_CAP_USER_INDEX_BUFFERS:
 217       return 1;
 218    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 219       return 0;
 220    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 221    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 222    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 223    case PIPE_CAP_TGSI_TEXCOORD:
 224       return 0;
 225    case PIPE_CAP_DRAW_INDIRECT:
 226       return 1;
 227
 228    case PIPE_CAP_CUBE_MAP_ARRAY:
 229       return 1;
 230    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 231       return 16;
 232    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 233       return 0;
 234    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 235       return 64;
 236    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 237       return 1;
 238    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 239       return 65536;
 240    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 241       return 1;
 242    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 243       return 0;
 244    case PIPE_CAP_MAX_VIEWPORTS:
 245       return PIPE_MAX_VIEWPORTS;
 246    case PIPE_CAP_ENDIANNESS:
 247       return PIPE_ENDIAN_NATIVE;
 248    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 249       return 1;
 250    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 251       return 1;
 252    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 253       return 4;
 254    case PIPE_CAP_TEXTURE_GATHER_SM5:
 255    case PIPE_CAP_TEXTURE_QUERY_LOD:
 256    case PIPE_CAP_SAMPLE_SHADING:
 257    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 258       return 0;
 259    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 260       return 1;
 261    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 262       return 0;
 263    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 264       return 1;
 265    case PIPE_CAP_FAKE_SW_MSAA:
 266       return 1;
 267    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 268       return 1;
 269
 270    case PIPE_CAP_VENDOR_ID:
 271       return 0xFFFFFFFF;
 272    case PIPE_CAP_DEVICE_ID:
 273       return 0xFFFFFFFF;
 274    case PIPE_CAP_ACCELERATED:
 275       return 0;
 276    case PIPE_CAP_VIDEO_MEMORY: {
 277       /* XXX: Do we want to return the full amount fo system memory ? */
 278       uint64_t system_memory;
 279
 280       if (!os_get_total_physical_memory(&system_memory))
 281          return 0;
 282
 283       return (int)(system_memory >> 20);
 284    }
 285    case PIPE_CAP_UMA:
 286       return 0;
 287    case PIPE_CAP_CLIP_HALFZ:
 288       return 1;
 289    case PIPE_CAP_VERTEXID_NOBASE:
 290       return 0;
 291    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 292    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 293    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 294       return 1;
 295    case PIPE_CAP_CULL_DISTANCE:
 296       return 1;
 297    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 298       return 1;
 299    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 300    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 301    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 302    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 303    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 304    case PIPE_CAP_TGSI_TXQS:
 305    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 306    case PIPE_CAP_SHAREABLE_SHADERS:
 307    case PIPE_CAP_CLEAR_TEXTURE:
 308    case PIPE_CAP_DRAW_PARAMETERS:
 309    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 310    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 311    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 312    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 313    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 314    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 315    case PIPE_CAP_INVALIDATE_BUFFER:
 316    case PIPE_CAP_GENERATE_MIPMAP:
 317    case PIPE_CAP_STRING_MARKER:
 318    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 319    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 320    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 321    case PIPE_CAP_QUERY_MEMORY_INFO:
 322    case PIPE_CAP_PCI_GROUP:
 323    case PIPE_CAP_PCI_BUS:
 324    case PIPE_CAP_PCI_DEVICE:
 325    case PIPE_CAP_PCI_FUNCTION:
 326    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 327    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 328    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 329    case PIPE_CAP_TGSI_VOTE:
 330    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 331    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 332    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 333       return 0;
 334    }
 335    /* should only get here on unhandled cases */
 336    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 337    return 0;
 338 }
 339
 340 static int
 341 llvmpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 342 {
 343    switch(shader)
 344    {
 345    case PIPE_SHADER_FRAGMENT:
 346       switch (param) {
 347       default:
 348          return gallivm_get_shader_param(param);
 349       }
 350    case PIPE_SHADER_VERTEX:
 351    case PIPE_SHADER_GEOMETRY:
 352       switch (param) {
 353       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 354          /* At this time, the draw module and llvmpipe driver only
 355           * support vertex shader texture lookups when LLVM is enabled in
 356           * the draw module.
 357           */
 358          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 359             return PIPE_MAX_SAMPLERS;
 360          else
 361             return 0;
 362       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 363          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 364             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 365          else
 366             return 0;
 367       default:
 368          return draw_get_shader_param(shader, param);
 369       }
 370    default:
 371       return 0;
 372    }
 373 }
 374
 375 static float
 376 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 377 {
 378    switch (param) {
 379    case PIPE_CAPF_MAX_LINE_WIDTH:
 380       /* fall-through */
 381    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 382       return 255.0; /* arbitrary */
 383    case PIPE_CAPF_MAX_POINT_WIDTH:
 384       /* fall-through */
 385    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 386       return 255.0; /* arbitrary */
 387    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 388       return 16.0; /* not actually signficant at this time */
 389    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 390       return 16.0; /* arbitrary */
 391    case PIPE_CAPF_GUARD_BAND_LEFT:
 392    case PIPE_CAPF_GUARD_BAND_TOP:
 393    case PIPE_CAPF_GUARD_BAND_RIGHT:
 394    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 395       return 0.0;
 396    }
 397    /* should only get here on unhandled cases */
 398    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 399    return 0.0;
 400 }
 401
 402
 403 /**
 404  * Query format support for creating a texture, drawing surface, etc.
 405  * \param format  the format to test
 406  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 407  */
 408 static boolean
 409 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 410                               enum pipe_format format,
 411                               enum pipe_texture_target target,
 412                               unsigned sample_count,
 413                               unsigned bind)
 414 {
 415    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 416    struct sw_winsys *winsys = screen->winsys;
 417    const struct util_format_description *format_desc;
 418
 419    format_desc = util_format_description(format);
 420    if (!format_desc)
 421       return FALSE;
 422
 423    assert(target == PIPE_BUFFER ||
 424           target == PIPE_TEXTURE_1D ||
 425           target == PIPE_TEXTURE_1D_ARRAY ||
 426           target == PIPE_TEXTURE_2D ||
 427           target == PIPE_TEXTURE_2D_ARRAY ||
 428           target == PIPE_TEXTURE_RECT ||
 429           target == PIPE_TEXTURE_3D ||
 430           target == PIPE_TEXTURE_CUBE ||
 431           target == PIPE_TEXTURE_CUBE_ARRAY);
 432
 433    if (sample_count > 1)
 434       return FALSE;
 435
 436    if (bind & PIPE_BIND_RENDER_TARGET) {
 437       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 438          /* this is a lie actually other formats COULD exist where we would fail */
 439          if (format_desc->nr_channels < 3)
 440             return FALSE;
 441       }
 442       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 443          return FALSE;
 444
 445       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 446           format != PIPE_FORMAT_R11G11B10_FLOAT)
 447          return FALSE;
 448
 449       assert(format_desc->block.width == 1);
 450       assert(format_desc->block.height == 1);
 451
 452       if (format_desc->is_mixed)
 453          return FALSE;
 454
 455       if (!format_desc->is_array && !format_desc->is_bitmask &&
 456           format != PIPE_FORMAT_R11G11B10_FLOAT)
 457          return FALSE;
 458    }
 459
 460    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 461        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 462       /* Disable all 3-channel formats, where channel size != 32 bits.
 463        * In some cases we run into crashes (in generate_unswizzled_blend()),
 464        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 465        * In any case, disabling the shallower 3-channel formats avoids a
 466        * number of issues with GL_ARB_copy_image support.
 467        */
 468       if (format_desc->is_array &&
 469           format_desc->nr_channels == 3 &&
 470           format_desc->block.bits != 96) {
 471          return FALSE;
 472       }
 473    }
 474
 475    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 476       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 477          return FALSE;
 478    }
 479
 480    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 481       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 482          return FALSE;
 483
 484       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 485          return FALSE;
 486
 487       /* TODO: Support stencil-only formats */
 488       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 489          return FALSE;
 490       }
 491    }
 492
 493    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC ||
 494        format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 495       /* Software decoding is not hooked up. */
 496       return FALSE;
 497    }
 498
 499    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 500        format != PIPE_FORMAT_ETC1_RGB8)
 501       return FALSE;
 502
 503    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 504       return util_format_s3tc_enabled;
 505    }
 506
 507    /*
 508     * Everything can be supported by u_format
 509     * (those without fetch_rgba_float might be not but shouldn't hit that)
 510     */
 511
 512    return TRUE;
 513 }
 514
 515
 516
 517
 518 static void
 519 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 520                            struct pipe_resource *resource,
 521                            unsigned level, unsigned layer,
 522                            void *context_private,
 523                            struct pipe_box *sub_box)
 524 {
 525    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 526    struct sw_winsys *winsys = screen->winsys;
 527    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 528
 529    assert(texture->dt);
 530    if (texture->dt)
 531       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 532 }
 533
 534 static void
 535 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 536 {
 537    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 538    struct sw_winsys *winsys = screen->winsys;
 539
 540    if (screen->rast)
 541       lp_rast_destroy(screen->rast);
 542
 543    lp_jit_screen_cleanup(screen);
 544
 545    if(winsys->destroy)
 546       winsys->destroy(winsys);
 547
 548    pipe_mutex_destroy(screen->rast_mutex);
 549
 550    FREE(screen);
 551 }
 552
 553
 554
 555
 556 /**
 557  * Fence reference counting.
 558  */
 559 static void
 560 llvmpipe_fence_reference(struct pipe_screen *screen,
 561                          struct pipe_fence_handle **ptr,
 562                          struct pipe_fence_handle *fence)
 563 {
 564    struct lp_fence **old = (struct lp_fence **) ptr;
 565    struct lp_fence *f = (struct lp_fence *) fence;
 566
 567    lp_fence_reference(old, f);
 568 }
 569
 570
 571 /**
 572  * Wait for the fence to finish.
 573  */
 574 static boolean
 575 llvmpipe_fence_finish(struct pipe_screen *screen,
 576                       struct pipe_context *ctx,
 577                       struct pipe_fence_handle *fence_handle,
 578                       uint64_t timeout)
 579 {
 580    struct lp_fence *f = (struct lp_fence *) fence_handle;
 581
 582    if (!timeout)
 583       return lp_fence_signalled(f);
 584
 585    lp_fence_wait(f);
 586    return TRUE;
 587 }
 588
 589 static uint64_t
 590 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 591 {
 592    return os_time_get_nano();
 593 }
 594
 595 /**
 596  * Create a new pipe_screen object
 597  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 598  */
 599 struct pipe_screen *
 600 llvmpipe_create_screen(struct sw_winsys *winsys)
 601 {
 602    struct llvmpipe_screen *screen;
 603
 604    util_cpu_detect();
 605
 606 #ifdef DEBUG
 607    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 608 #endif
 609
 610    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 611
 612    screen = CALLOC_STRUCT(llvmpipe_screen);
 613    if (!screen)
 614       return NULL;
 615
 616    if (!lp_jit_screen_init(screen)) {
 617       FREE(screen);
 618       return NULL;
 619    }
 620
 621    screen->winsys = winsys;
 622
 623    screen->base.destroy = llvmpipe_destroy_screen;
 624
 625    screen->base.get_name = llvmpipe_get_name;
 626    screen->base.get_vendor = llvmpipe_get_vendor;
 627    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 628    screen->base.get_param = llvmpipe_get_param;
 629    screen->base.get_shader_param = llvmpipe_get_shader_param;
 630    screen->base.get_paramf = llvmpipe_get_paramf;
 631    screen->base.is_format_supported = llvmpipe_is_format_supported;
 632
 633    screen->base.context_create = llvmpipe_create_context;
 634    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 635    screen->base.fence_reference = llvmpipe_fence_reference;
 636    screen->base.fence_finish = llvmpipe_fence_finish;
 637
 638    screen->base.get_timestamp = llvmpipe_get_timestamp;
 639
 640    llvmpipe_init_screen_resource_funcs(&screen->base);
 641
 642    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 643 #ifdef PIPE_SUBSYSTEM_EMBEDDED
 644    screen->num_threads = 0;
 645 #endif
 646    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 647    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 648
 649    screen->rast = lp_rast_create(screen->num_threads);
 650    if (!screen->rast) {
 651       lp_jit_screen_cleanup(screen);
 652       FREE(screen);
 653       return NULL;
 654    }
 655    pipe_mutex_init(screen->rast_mutex);
 656
 657    util_format_s3tc_init();
 658
 659    return &screen->base;
 660 }