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 "util/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_SM3:
 115       return 1;
 116    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 117       return 1;
 118    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 119       return PIPE_MAX_SO_BUFFERS;
 120    case PIPE_CAP_ANISOTROPIC_FILTER:
 121       return 0;
 122    case PIPE_CAP_POINT_SPRITE:
 123       return 1;
 124    case PIPE_CAP_MAX_RENDER_TARGETS:
 125       return PIPE_MAX_COLOR_BUFS;
 126    case PIPE_CAP_OCCLUSION_QUERY:
 127       return 1;
 128    case PIPE_CAP_QUERY_TIME_ELAPSED:
 129       return 0;
 130    case PIPE_CAP_QUERY_TIMESTAMP:
 131       return 1;
 132    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 133       return 1;
 134    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 135    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
 136       return 1;
 137    case PIPE_CAP_TEXTURE_SWIZZLE:
 138       return 1;
 139    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 140       return 0;
 141    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 142       return LP_MAX_TEXTURE_2D_LEVELS;
 143    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 144       return LP_MAX_TEXTURE_3D_LEVELS;
 145    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 146       return LP_MAX_TEXTURE_CUBE_LEVELS;
 147    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 148       return LP_MAX_TEXTURE_ARRAY_LAYERS;
 149    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 150       return 1;
 151    case PIPE_CAP_INDEP_BLEND_ENABLE:
 152       return 1;
 153    case PIPE_CAP_INDEP_BLEND_FUNC:
 154       return 1;
 155    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 156    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 157    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 158       return 1;
 159    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 160       return 0;
 161    case PIPE_CAP_PRIMITIVE_RESTART:
 162       return 1;
 163    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 164       return 1;
 165    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 166       return 1;
 167    case PIPE_CAP_TGSI_INSTANCEID:
 168    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 169    case PIPE_CAP_START_INSTANCE:
 170       return 1;
 171    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 172       return 0;
 173    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 174       return 1;
 175    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 176    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 177       return 1;
 178    /* this is a lie could support arbitrary large offsets */
 179    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 180    case PIPE_CAP_MIN_TEXEL_OFFSET:
 181       return -32;
 182    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 183    case PIPE_CAP_MAX_TEXEL_OFFSET:
 184       return 31;
 185    case PIPE_CAP_CONDITIONAL_RENDER:
 186       return 1;
 187    case PIPE_CAP_TEXTURE_BARRIER:
 188       return 0;
 189    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 190    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 191       return 16*4;
 192    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 193    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 194       return 1024;
 195    case PIPE_CAP_MAX_VERTEX_STREAMS:
 196       return 1;
 197    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 198       return 2048;
 199    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 200    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 201       return 1;
 202    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 203       return 0;
 204    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 205    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 206       return 1;
 207    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 208       return 330;
 209    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 210       return 140;
 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       return 1;
 217    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 218    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 219    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 220    case PIPE_CAP_TGSI_TEXCOORD:
 221       return 0;
 222    case PIPE_CAP_DRAW_INDIRECT:
 223       return 1;
 224
 225    case PIPE_CAP_CUBE_MAP_ARRAY:
 226       return 1;
 227    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 228       return 16;
 229    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 230       return 0;
 231    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 232       return 64;
 233    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 234       return 1;
 235    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 236       return 65536;
 237    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 238       return 1;
 239    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 240       return 0;
 241    case PIPE_CAP_MAX_VIEWPORTS:
 242       return PIPE_MAX_VIEWPORTS;
 243    case PIPE_CAP_ENDIANNESS:
 244       return PIPE_ENDIAN_NATIVE;
 245    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 246       return 1;
 247    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 248       return 1;
 249    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 250       return 4;
 251    case PIPE_CAP_TEXTURE_GATHER_SM5:
 252    case PIPE_CAP_SAMPLE_SHADING:
 253    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 254       return 0;
 255    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 256       return 1;
 257    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 258    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 259       return 0;
 260    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 261       return 1;
 262    case PIPE_CAP_FAKE_SW_MSAA:
 263       return 1;
 264    case PIPE_CAP_TEXTURE_QUERY_LOD:
 265    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 266    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 267    case PIPE_CAP_DOUBLES:
 268    case PIPE_CAP_INT64:
 269    case PIPE_CAP_INT64_DIVMOD:
 270    case PIPE_CAP_QUERY_SO_OVERFLOW:
 271       return 1;
 272
 273    case PIPE_CAP_VENDOR_ID:
 274       return 0xFFFFFFFF;
 275    case PIPE_CAP_DEVICE_ID:
 276       return 0xFFFFFFFF;
 277    case PIPE_CAP_ACCELERATED:
 278       return 0;
 279    case PIPE_CAP_VIDEO_MEMORY: {
 280       /* XXX: Do we want to return the full amount fo system memory ? */
 281       uint64_t system_memory;
 282
 283       if (!os_get_total_physical_memory(&system_memory))
 284          return 0;
 285
 286       if (sizeof(void *) == 4)
 287          /* Cap to 2 GB on 32 bits system. We do this because llvmpipe does
 288           * eat application memory, which is quite limited on 32 bits. App
 289           * shouldn't expect too much available memory. */
 290          system_memory = MIN2(system_memory, 2048 << 20);
 291
 292       return (int)(system_memory >> 20);
 293    }
 294    case PIPE_CAP_UMA:
 295       return 0;
 296    case PIPE_CAP_CLIP_HALFZ:
 297       return 1;
 298    case PIPE_CAP_VERTEXID_NOBASE:
 299       return 0;
 300    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 301    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 302    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 303       return 1;
 304    case PIPE_CAP_CULL_DISTANCE:
 305       return 1;
 306    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 307       return 1;
 308    case PIPE_CAP_CLEAR_TEXTURE:
 309       return 1;
 310    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 311    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 312    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 313    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 314    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 315    case PIPE_CAP_TGSI_TXQS:
 316    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 317    case PIPE_CAP_SHAREABLE_SHADERS:
 318    case PIPE_CAP_DRAW_PARAMETERS:
 319    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 320    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 321    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 322    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 323    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 324    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 325    case PIPE_CAP_INVALIDATE_BUFFER:
 326    case PIPE_CAP_GENERATE_MIPMAP:
 327    case PIPE_CAP_STRING_MARKER:
 328    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 329    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 330    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 331    case PIPE_CAP_QUERY_MEMORY_INFO:
 332    case PIPE_CAP_PCI_GROUP:
 333    case PIPE_CAP_PCI_BUS:
 334    case PIPE_CAP_PCI_DEVICE:
 335    case PIPE_CAP_PCI_FUNCTION:
 336    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 337    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 338    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 339    case PIPE_CAP_TGSI_VOTE:
 340    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 341    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 342    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 343    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 344    case PIPE_CAP_NATIVE_FENCE_FD:
 345    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 346    case PIPE_CAP_TGSI_FS_FBFETCH:
 347    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 348    case PIPE_CAP_TGSI_CLOCK:
 349    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 350    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 351    case PIPE_CAP_TGSI_BALLOT:
 352    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 353    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 354    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 355    case PIPE_CAP_POST_DEPTH_COVERAGE:
 356    case PIPE_CAP_BINDLESS_TEXTURE:
 357    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 358    case PIPE_CAP_MEMOBJ:
 359    case PIPE_CAP_LOAD_CONSTBUF:
 360    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 361    case PIPE_CAP_TILE_RASTER_ORDER:
 362    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 363    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 364    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 365    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 366    case PIPE_CAP_FENCE_SIGNAL:
 367    case PIPE_CAP_CONSTBUF0_FLAGS:
 368    case PIPE_CAP_PACKED_UNIFORMS:
 369    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 370    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 371    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 372    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 373    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 374    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 375    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 376       return 0;
 377    case PIPE_CAP_MAX_GS_INVOCATIONS:
 378       return 32;
 379    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 380       return 1 << 27;
 381    }
 382    /* should only get here on unhandled cases */
 383    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 384    return 0;
 385 }
 386
 387 static int
 388 llvmpipe_get_shader_param(struct pipe_screen *screen,
 389                           enum pipe_shader_type shader,
 390                           enum pipe_shader_cap param)
 391 {
 392    switch(shader)
 393    {
 394    case PIPE_SHADER_FRAGMENT:
 395       switch (param) {
 396       default:
 397          return gallivm_get_shader_param(param);
 398       }
 399    case PIPE_SHADER_VERTEX:
 400    case PIPE_SHADER_GEOMETRY:
 401       switch (param) {
 402       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 403          /* At this time, the draw module and llvmpipe driver only
 404           * support vertex shader texture lookups when LLVM is enabled in
 405           * the draw module.
 406           */
 407          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 408             return PIPE_MAX_SAMPLERS;
 409          else
 410             return 0;
 411       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 412          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 413             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 414          else
 415             return 0;
 416       default:
 417          return draw_get_shader_param(shader, param);
 418       }
 419    default:
 420       return 0;
 421    }
 422 }
 423
 424 static float
 425 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 426 {
 427    switch (param) {
 428    case PIPE_CAPF_MAX_LINE_WIDTH:
 429       /* fall-through */
 430    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 431       return 255.0; /* arbitrary */
 432    case PIPE_CAPF_MAX_POINT_WIDTH:
 433       /* fall-through */
 434    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 435       return 255.0; /* arbitrary */
 436    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 437       return 16.0; /* not actually signficant at this time */
 438    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 439       return 16.0; /* arbitrary */
 440    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 441       return 0.0;
 442    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 443       return 0.0;
 444    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 445       return 0.0;
 446    }
 447    /* should only get here on unhandled cases */
 448    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 449    return 0.0;
 450 }
 451
 452
 453 /**
 454  * Query format support for creating a texture, drawing surface, etc.
 455  * \param format  the format to test
 456  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 457  */
 458 static boolean
 459 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 460                               enum pipe_format format,
 461                               enum pipe_texture_target target,
 462                               unsigned sample_count,
 463                               unsigned storage_sample_count,
 464                               unsigned bind)
 465 {
 466    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 467    struct sw_winsys *winsys = screen->winsys;
 468    const struct util_format_description *format_desc;
 469
 470    format_desc = util_format_description(format);
 471    if (!format_desc)
 472       return FALSE;
 473
 474    assert(target == PIPE_BUFFER ||
 475           target == PIPE_TEXTURE_1D ||
 476           target == PIPE_TEXTURE_1D_ARRAY ||
 477           target == PIPE_TEXTURE_2D ||
 478           target == PIPE_TEXTURE_2D_ARRAY ||
 479           target == PIPE_TEXTURE_RECT ||
 480           target == PIPE_TEXTURE_3D ||
 481           target == PIPE_TEXTURE_CUBE ||
 482           target == PIPE_TEXTURE_CUBE_ARRAY);
 483
 484    if (sample_count > 1)
 485       return FALSE;
 486
 487    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 488       return false;
 489
 490    if (bind & PIPE_BIND_RENDER_TARGET) {
 491       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 492          /* this is a lie actually other formats COULD exist where we would fail */
 493          if (format_desc->nr_channels < 3)
 494             return FALSE;
 495       }
 496       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 497          return FALSE;
 498
 499       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 500           format != PIPE_FORMAT_R11G11B10_FLOAT)
 501          return FALSE;
 502
 503       assert(format_desc->block.width == 1);
 504       assert(format_desc->block.height == 1);
 505
 506       if (format_desc->is_mixed)
 507          return FALSE;
 508
 509       if (!format_desc->is_array && !format_desc->is_bitmask &&
 510           format != PIPE_FORMAT_R11G11B10_FLOAT)
 511          return FALSE;
 512    }
 513
 514    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 515        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 516       /* Disable all 3-channel formats, where channel size != 32 bits.
 517        * In some cases we run into crashes (in generate_unswizzled_blend()),
 518        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 519        * In any case, disabling the shallower 3-channel formats avoids a
 520        * number of issues with GL_ARB_copy_image support.
 521        */
 522       if (format_desc->is_array &&
 523           format_desc->nr_channels == 3 &&
 524           format_desc->block.bits != 96) {
 525          return FALSE;
 526       }
 527    }
 528
 529    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 530       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 531          return FALSE;
 532    }
 533
 534    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 535       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 536          return FALSE;
 537
 538       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 539          return FALSE;
 540
 541       /* TODO: Support stencil-only formats */
 542       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 543          return FALSE;
 544       }
 545    }
 546
 547    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 548       /* Software decoding is not hooked up. */
 549       return FALSE;
 550    }
 551
 552    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 553        format != PIPE_FORMAT_ETC1_RGB8)
 554       return FALSE;
 555
 556    /*
 557     * Everything can be supported by u_format
 558     * (those without fetch_rgba_float might be not but shouldn't hit that)
 559     */
 560
 561    return TRUE;
 562 }
 563
 564
 565
 566
 567 static void
 568 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 569                            struct pipe_resource *resource,
 570                            unsigned level, unsigned layer,
 571                            void *context_private,
 572                            struct pipe_box *sub_box)
 573 {
 574    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 575    struct sw_winsys *winsys = screen->winsys;
 576    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 577
 578    assert(texture->dt);
 579    if (texture->dt)
 580       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 581 }
 582
 583 static void
 584 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 585 {
 586    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 587    struct sw_winsys *winsys = screen->winsys;
 588
 589    if (screen->rast)
 590       lp_rast_destroy(screen->rast);
 591
 592    lp_jit_screen_cleanup(screen);
 593
 594    if(winsys->destroy)
 595       winsys->destroy(winsys);
 596
 597    mtx_destroy(&screen->rast_mutex);
 598
 599    FREE(screen);
 600 }
 601
 602
 603
 604
 605 /**
 606  * Fence reference counting.
 607  */
 608 static void
 609 llvmpipe_fence_reference(struct pipe_screen *screen,
 610                          struct pipe_fence_handle **ptr,
 611                          struct pipe_fence_handle *fence)
 612 {
 613    struct lp_fence **old = (struct lp_fence **) ptr;
 614    struct lp_fence *f = (struct lp_fence *) fence;
 615
 616    lp_fence_reference(old, f);
 617 }
 618
 619
 620 /**
 621  * Wait for the fence to finish.
 622  */
 623 static boolean
 624 llvmpipe_fence_finish(struct pipe_screen *screen,
 625                       struct pipe_context *ctx,
 626                       struct pipe_fence_handle *fence_handle,
 627                       uint64_t timeout)
 628 {
 629    struct lp_fence *f = (struct lp_fence *) fence_handle;
 630
 631    if (!timeout)
 632       return lp_fence_signalled(f);
 633
 634    lp_fence_wait(f);
 635    return TRUE;
 636 }
 637
 638 static uint64_t
 639 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 640 {
 641    return os_time_get_nano();
 642 }
 643
 644 /**
 645  * Create a new pipe_screen object
 646  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 647  */
 648 struct pipe_screen *
 649 llvmpipe_create_screen(struct sw_winsys *winsys)
 650 {
 651    struct llvmpipe_screen *screen;
 652
 653    util_cpu_detect();
 654
 655 #ifdef DEBUG
 656    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 657 #endif
 658
 659    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 660
 661    screen = CALLOC_STRUCT(llvmpipe_screen);
 662    if (!screen)
 663       return NULL;
 664
 665    if (!lp_jit_screen_init(screen)) {
 666       FREE(screen);
 667       return NULL;
 668    }
 669
 670    screen->winsys = winsys;
 671
 672    screen->base.destroy = llvmpipe_destroy_screen;
 673
 674    screen->base.get_name = llvmpipe_get_name;
 675    screen->base.get_vendor = llvmpipe_get_vendor;
 676    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 677    screen->base.get_param = llvmpipe_get_param;
 678    screen->base.get_shader_param = llvmpipe_get_shader_param;
 679    screen->base.get_paramf = llvmpipe_get_paramf;
 680    screen->base.is_format_supported = llvmpipe_is_format_supported;
 681
 682    screen->base.context_create = llvmpipe_create_context;
 683    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 684    screen->base.fence_reference = llvmpipe_fence_reference;
 685    screen->base.fence_finish = llvmpipe_fence_finish;
 686
 687    screen->base.get_timestamp = llvmpipe_get_timestamp;
 688
 689    llvmpipe_init_screen_resource_funcs(&screen->base);
 690
 691    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 692 #ifdef PIPE_SUBSYSTEM_EMBEDDED
 693    screen->num_threads = 0;
 694 #endif
 695    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 696    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 697
 698    screen->rast = lp_rast_create(screen->num_threads);
 699    if (!screen->rast) {
 700       lp_jit_screen_cleanup(screen);
 701       FREE(screen);
 702       return NULL;
 703    }
 704    (void) mtx_init(&screen->rast_mutex, mtx_plain);
 705
 706    return &screen->base;
 707 }