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    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 204       return 1;
 205    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 206       return 0;
 207    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 208    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 209       return 1;
 210    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 211       return 330;
 212    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 213       return 0;
 214    case PIPE_CAP_COMPUTE:
 215       return 0;
 216    case PIPE_CAP_USER_VERTEX_BUFFERS:
 217    case PIPE_CAP_USER_INDEX_BUFFERS:
 218       return 1;
 219    case PIPE_CAP_USER_CONSTANT_BUFFERS:
 220       return 0;
 221    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 222    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 223    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 224    case PIPE_CAP_TGSI_TEXCOORD:
 225       return 0;
 226    case PIPE_CAP_DRAW_INDIRECT:
 227       return 1;
 228
 229    case PIPE_CAP_CUBE_MAP_ARRAY:
 230       return 1;
 231    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 232       return 16;
 233    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 234       return 0;
 235    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 236       return 64;
 237    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 238       return 1;
 239    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 240       return 65536;
 241    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 242       return 1;
 243    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 244       return 0;
 245    case PIPE_CAP_MAX_VIEWPORTS:
 246       return PIPE_MAX_VIEWPORTS;
 247    case PIPE_CAP_ENDIANNESS:
 248       return PIPE_ENDIAN_NATIVE;
 249    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 250       return 1;
 251    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 252       return 1;
 253    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 254       return 4;
 255    case PIPE_CAP_TEXTURE_GATHER_SM5:
 256    case PIPE_CAP_TEXTURE_QUERY_LOD:
 257    case PIPE_CAP_SAMPLE_SHADING:
 258    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 259       return 0;
 260    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 261       return 1;
 262    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 263       return 0;
 264    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 265       return 1;
 266    case PIPE_CAP_FAKE_SW_MSAA:
 267       return 1;
 268    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 269    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 270       return 1;
 271
 272    case PIPE_CAP_VENDOR_ID:
 273       return 0xFFFFFFFF;
 274    case PIPE_CAP_DEVICE_ID:
 275       return 0xFFFFFFFF;
 276    case PIPE_CAP_ACCELERATED:
 277       return 0;
 278    case PIPE_CAP_VIDEO_MEMORY: {
 279       /* XXX: Do we want to return the full amount fo system memory ? */
 280       uint64_t system_memory;
 281
 282       if (!os_get_total_physical_memory(&system_memory))
 283          return 0;
 284
 285       if (sizeof(void *) == 4)
 286          /* Cap to 2 GB on 32 bits system. We do this because llvmpipe does
 287           * eat application memory, which is quite limited on 32 bits. App
 288           * shouldn't expect too much available memory. */
 289          system_memory = MIN2(system_memory, 2048 << 20);
 290
 291       return (int)(system_memory >> 20);
 292    }
 293    case PIPE_CAP_UMA:
 294       return 0;
 295    case PIPE_CAP_CLIP_HALFZ:
 296       return 1;
 297    case PIPE_CAP_VERTEXID_NOBASE:
 298       return 0;
 299    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 300    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 301    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 302       return 1;
 303    case PIPE_CAP_CULL_DISTANCE:
 304       return 1;
 305    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 306       return 1;
 307    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 308    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 309    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 310    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 311    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 312    case PIPE_CAP_TGSI_TXQS:
 313    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 314    case PIPE_CAP_SHAREABLE_SHADERS:
 315    case PIPE_CAP_CLEAR_TEXTURE:
 316    case PIPE_CAP_DRAW_PARAMETERS:
 317    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 318    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 319    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 320    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 321    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 322    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 323    case PIPE_CAP_INVALIDATE_BUFFER:
 324    case PIPE_CAP_GENERATE_MIPMAP:
 325    case PIPE_CAP_STRING_MARKER:
 326    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 327    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 328    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 329    case PIPE_CAP_QUERY_MEMORY_INFO:
 330    case PIPE_CAP_PCI_GROUP:
 331    case PIPE_CAP_PCI_BUS:
 332    case PIPE_CAP_PCI_DEVICE:
 333    case PIPE_CAP_PCI_FUNCTION:
 334    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 335    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 336    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 337    case PIPE_CAP_TGSI_VOTE:
 338    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 339    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 340    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 341    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 342    case PIPE_CAP_NATIVE_FENCE_FD:
 343       return 0;
 344    }
 345    /* should only get here on unhandled cases */
 346    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 347    return 0;
 348 }
 349
 350 static int
 351 llvmpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
 352 {
 353    switch(shader)
 354    {
 355    case PIPE_SHADER_FRAGMENT:
 356       switch (param) {
 357       default:
 358          return gallivm_get_shader_param(param);
 359       }
 360    case PIPE_SHADER_VERTEX:
 361    case PIPE_SHADER_GEOMETRY:
 362       switch (param) {
 363       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 364          /* At this time, the draw module and llvmpipe driver only
 365           * support vertex shader texture lookups when LLVM is enabled in
 366           * the draw module.
 367           */
 368          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 369             return PIPE_MAX_SAMPLERS;
 370          else
 371             return 0;
 372       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 373          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 374             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 375          else
 376             return 0;
 377       default:
 378          return draw_get_shader_param(shader, param);
 379       }
 380    default:
 381       return 0;
 382    }
 383 }
 384
 385 static float
 386 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 387 {
 388    switch (param) {
 389    case PIPE_CAPF_MAX_LINE_WIDTH:
 390       /* fall-through */
 391    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 392       return 255.0; /* arbitrary */
 393    case PIPE_CAPF_MAX_POINT_WIDTH:
 394       /* fall-through */
 395    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 396       return 255.0; /* arbitrary */
 397    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 398       return 16.0; /* not actually signficant at this time */
 399    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 400       return 16.0; /* arbitrary */
 401    case PIPE_CAPF_GUARD_BAND_LEFT:
 402    case PIPE_CAPF_GUARD_BAND_TOP:
 403    case PIPE_CAPF_GUARD_BAND_RIGHT:
 404    case PIPE_CAPF_GUARD_BAND_BOTTOM:
 405       return 0.0;
 406    }
 407    /* should only get here on unhandled cases */
 408    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 409    return 0.0;
 410 }
 411
 412
 413 /**
 414  * Query format support for creating a texture, drawing surface, etc.
 415  * \param format  the format to test
 416  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 417  */
 418 static boolean
 419 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 420                               enum pipe_format format,
 421                               enum pipe_texture_target target,
 422                               unsigned sample_count,
 423                               unsigned bind)
 424 {
 425    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 426    struct sw_winsys *winsys = screen->winsys;
 427    const struct util_format_description *format_desc;
 428
 429    format_desc = util_format_description(format);
 430    if (!format_desc)
 431       return FALSE;
 432
 433    assert(target == PIPE_BUFFER ||
 434           target == PIPE_TEXTURE_1D ||
 435           target == PIPE_TEXTURE_1D_ARRAY ||
 436           target == PIPE_TEXTURE_2D ||
 437           target == PIPE_TEXTURE_2D_ARRAY ||
 438           target == PIPE_TEXTURE_RECT ||
 439           target == PIPE_TEXTURE_3D ||
 440           target == PIPE_TEXTURE_CUBE ||
 441           target == PIPE_TEXTURE_CUBE_ARRAY);
 442
 443    if (sample_count > 1)
 444       return FALSE;
 445
 446    if (bind & PIPE_BIND_RENDER_TARGET) {
 447       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 448          /* this is a lie actually other formats COULD exist where we would fail */
 449          if (format_desc->nr_channels < 3)
 450             return FALSE;
 451       }
 452       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 453          return FALSE;
 454
 455       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 456           format != PIPE_FORMAT_R11G11B10_FLOAT)
 457          return FALSE;
 458
 459       assert(format_desc->block.width == 1);
 460       assert(format_desc->block.height == 1);
 461
 462       if (format_desc->is_mixed)
 463          return FALSE;
 464
 465       if (!format_desc->is_array && !format_desc->is_bitmask &&
 466           format != PIPE_FORMAT_R11G11B10_FLOAT)
 467          return FALSE;
 468    }
 469
 470    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 471        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 472       /* Disable all 3-channel formats, where channel size != 32 bits.
 473        * In some cases we run into crashes (in generate_unswizzled_blend()),
 474        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 475        * In any case, disabling the shallower 3-channel formats avoids a
 476        * number of issues with GL_ARB_copy_image support.
 477        */
 478       if (format_desc->is_array &&
 479           format_desc->nr_channels == 3 &&
 480           format_desc->block.bits != 96) {
 481          return FALSE;
 482       }
 483    }
 484
 485    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 486       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 487          return FALSE;
 488    }
 489
 490    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 491       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 492          return FALSE;
 493
 494       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 495          return FALSE;
 496
 497       /* TODO: Support stencil-only formats */
 498       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 499          return FALSE;
 500       }
 501    }
 502
 503    if (format_desc->layout == UTIL_FORMAT_LAYOUT_BPTC ||
 504        format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 505       /* Software decoding is not hooked up. */
 506       return FALSE;
 507    }
 508
 509    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 510        format != PIPE_FORMAT_ETC1_RGB8)
 511       return FALSE;
 512
 513    if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
 514       return util_format_s3tc_enabled;
 515    }
 516
 517    /*
 518     * Everything can be supported by u_format
 519     * (those without fetch_rgba_float might be not but shouldn't hit that)
 520     */
 521
 522    return TRUE;
 523 }
 524
 525
 526
 527
 528 static void
 529 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 530                            struct pipe_resource *resource,
 531                            unsigned level, unsigned layer,
 532                            void *context_private,
 533                            struct pipe_box *sub_box)
 534 {
 535    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 536    struct sw_winsys *winsys = screen->winsys;
 537    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 538
 539    assert(texture->dt);
 540    if (texture->dt)
 541       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 542 }
 543
 544 static void
 545 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 546 {
 547    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 548    struct sw_winsys *winsys = screen->winsys;
 549
 550    if (screen->rast)
 551       lp_rast_destroy(screen->rast);
 552
 553    lp_jit_screen_cleanup(screen);
 554
 555    if(winsys->destroy)
 556       winsys->destroy(winsys);
 557
 558    pipe_mutex_destroy(screen->rast_mutex);
 559
 560    FREE(screen);
 561 }
 562
 563
 564
 565
 566 /**
 567  * Fence reference counting.
 568  */
 569 static void
 570 llvmpipe_fence_reference(struct pipe_screen *screen,
 571                          struct pipe_fence_handle **ptr,
 572                          struct pipe_fence_handle *fence)
 573 {
 574    struct lp_fence **old = (struct lp_fence **) ptr;
 575    struct lp_fence *f = (struct lp_fence *) fence;
 576
 577    lp_fence_reference(old, f);
 578 }
 579
 580
 581 /**
 582  * Wait for the fence to finish.
 583  */
 584 static boolean
 585 llvmpipe_fence_finish(struct pipe_screen *screen,
 586                       struct pipe_context *ctx,
 587                       struct pipe_fence_handle *fence_handle,
 588                       uint64_t timeout)
 589 {
 590    struct lp_fence *f = (struct lp_fence *) fence_handle;
 591
 592    if (!timeout)
 593       return lp_fence_signalled(f);
 594
 595    lp_fence_wait(f);
 596    return TRUE;
 597 }
 598
 599 static uint64_t
 600 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 601 {
 602    return os_time_get_nano();
 603 }
 604
 605 /**
 606  * Create a new pipe_screen object
 607  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 608  */
 609 struct pipe_screen *
 610 llvmpipe_create_screen(struct sw_winsys *winsys)
 611 {
 612    struct llvmpipe_screen *screen;
 613
 614    util_cpu_detect();
 615
 616 #ifdef DEBUG
 617    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 618 #endif
 619
 620    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 621
 622    screen = CALLOC_STRUCT(llvmpipe_screen);
 623    if (!screen)
 624       return NULL;
 625
 626    if (!lp_jit_screen_init(screen)) {
 627       FREE(screen);
 628       return NULL;
 629    }
 630
 631    screen->winsys = winsys;
 632
 633    screen->base.destroy = llvmpipe_destroy_screen;
 634
 635    screen->base.get_name = llvmpipe_get_name;
 636    screen->base.get_vendor = llvmpipe_get_vendor;
 637    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 638    screen->base.get_param = llvmpipe_get_param;
 639    screen->base.get_shader_param = llvmpipe_get_shader_param;
 640    screen->base.get_paramf = llvmpipe_get_paramf;
 641    screen->base.is_format_supported = llvmpipe_is_format_supported;
 642
 643    screen->base.context_create = llvmpipe_create_context;
 644    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 645    screen->base.fence_reference = llvmpipe_fence_reference;
 646    screen->base.fence_finish = llvmpipe_fence_finish;
 647
 648    screen->base.get_timestamp = llvmpipe_get_timestamp;
 649
 650    llvmpipe_init_screen_resource_funcs(&screen->base);
 651
 652    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 653 #ifdef PIPE_SUBSYSTEM_EMBEDDED
 654    screen->num_threads = 0;
 655 #endif
 656    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 657    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 658
 659    screen->rast = lp_rast_create(screen->num_threads);
 660    if (!screen->rast) {
 661       lp_jit_screen_cleanup(screen);
 662       FREE(screen);
 663       return NULL;
 664    }
 665    pipe_mutex_init(screen->rast_mutex);
 666
 667    util_format_s3tc_init();
 668
 669    return &screen->base;
 670 }