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_screen.h"
  34 #include "util/u_string.h"
  35 #include "util/u_format_s3tc.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_screen.h"
  38 #include "draw/draw_context.h"
  39 #include "gallivm/lp_bld_type.h"
  40
  41 #include "util/os_misc.h"
  42 #include "util/os_time.h"
  43 #include "lp_texture.h"
  44 #include "lp_fence.h"
  45 #include "lp_jit.h"
  46 #include "lp_screen.h"
  47 #include "lp_context.h"
  48 #include "lp_debug.h"
  49 #include "lp_public.h"
  50 #include "lp_limits.h"
  51 #include "lp_rast.h"
  52
  53 #include "state_tracker/sw_winsys.h"
  54
  55 #ifdef DEBUG
  56 int LP_DEBUG = 0;
  57
  58 static const struct debug_named_value lp_debug_flags[] = {
  59    { "pipe",   DEBUG_PIPE, NULL },
  60    { "tgsi",   DEBUG_TGSI, NULL },
  61    { "tex",    DEBUG_TEX, NULL },
  62    { "setup",  DEBUG_SETUP, NULL },
  63    { "rast",   DEBUG_RAST, NULL },
  64    { "query",  DEBUG_QUERY, NULL },
  65    { "screen", DEBUG_SCREEN, NULL },
  66    { "counters", DEBUG_COUNTERS, NULL },
  67    { "scene", DEBUG_SCENE, NULL },
  68    { "fence", DEBUG_FENCE, NULL },
  69    { "mem", DEBUG_MEM, NULL },
  70    { "fs", DEBUG_FS, NULL },
  71    DEBUG_NAMED_VALUE_END
  72 };
  73 #endif
  74
  75 int LP_PERF = 0;
  76 static const struct debug_named_value lp_perf_flags[] = {
  77    { "texmem",         PERF_TEX_MEM, NULL },
  78    { "no_mipmap",      PERF_NO_MIPMAPS, NULL },
  79    { "no_linear",      PERF_NO_LINEAR, NULL },
  80    { "no_mip_linear",  PERF_NO_MIP_LINEAR, NULL },
  81    { "no_tex",         PERF_NO_TEX, NULL },
  82    { "no_blend",       PERF_NO_BLEND, NULL },
  83    { "no_depth",       PERF_NO_DEPTH, NULL },
  84    { "no_alphatest",   PERF_NO_ALPHATEST, NULL },
  85    DEBUG_NAMED_VALUE_END
  86 };
  87
  88
  89 static const char *
  90 llvmpipe_get_vendor(struct pipe_screen *screen)
  91 {
  92    return "VMware, Inc.";
  93 }
  94
  95
  96 static const char *
  97 llvmpipe_get_name(struct pipe_screen *screen)
  98 {
  99    static char buf[100];
 100    snprintf(buf, sizeof(buf), "llvmpipe (LLVM %u.%u, %u bits)",
 101             HAVE_LLVM >> 8, HAVE_LLVM & 0xff,
 102             lp_native_vector_width );
 103    return buf;
 104 }
 105
 106
 107 static int
 108 llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 109 {
 110    switch (param) {
 111    case PIPE_CAP_NPOT_TEXTURES:
 112    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
 113    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
 114       return 1;
 115    case PIPE_CAP_FRAGMENT_SHADER_TEXTURE_LOD:
 116    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
 117    case PIPE_CAP_VERTEX_SHADER_SATURATE:
 118       return 1;
 119    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 120       return 1;
 121    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 122       return PIPE_MAX_SO_BUFFERS;
 123    case PIPE_CAP_ANISOTROPIC_FILTER:
 124       return 0;
 125    case PIPE_CAP_POINT_SPRITE:
 126       return 1;
 127    case PIPE_CAP_MAX_RENDER_TARGETS:
 128       return PIPE_MAX_COLOR_BUFS;
 129    case PIPE_CAP_OCCLUSION_QUERY:
 130       return 1;
 131    case PIPE_CAP_QUERY_TIME_ELAPSED:
 132       return 0;
 133    case PIPE_CAP_QUERY_TIMESTAMP:
 134       return 1;
 135    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 136       return 1;
 137    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 138    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
 139       return 1;
 140    case PIPE_CAP_TEXTURE_SWIZZLE:
 141       return 1;
 142    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 143    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
 144       return 0;
 145    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
 146       return 1 << (LP_MAX_TEXTURE_2D_LEVELS - 1);
 147    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 148       return LP_MAX_TEXTURE_3D_LEVELS;
 149    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 150       return LP_MAX_TEXTURE_CUBE_LEVELS;
 151    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 152       return LP_MAX_TEXTURE_ARRAY_LAYERS;
 153    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 154       return 1;
 155    case PIPE_CAP_INDEP_BLEND_ENABLE:
 156       return 1;
 157    case PIPE_CAP_INDEP_BLEND_FUNC:
 158       return 1;
 159    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 160    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 161    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 162       return 1;
 163    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 164    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 165       return 0;
 166    case PIPE_CAP_PRIMITIVE_RESTART:
 167       return 1;
 168    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 169       return 1;
 170    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 171       return 1;
 172    case PIPE_CAP_TGSI_INSTANCEID:
 173    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 174    case PIPE_CAP_START_INSTANCE:
 175       return 1;
 176    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 177       return 0;
 178    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 179       return 1;
 180    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 181    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 182       return 1;
 183    /* this is a lie could support arbitrary large offsets */
 184    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 185    case PIPE_CAP_MIN_TEXEL_OFFSET:
 186       return -32;
 187    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 188    case PIPE_CAP_MAX_TEXEL_OFFSET:
 189       return 31;
 190    case PIPE_CAP_CONDITIONAL_RENDER:
 191       return 1;
 192    case PIPE_CAP_TEXTURE_BARRIER:
 193       return 0;
 194    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 195    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 196       return 16*4;
 197    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 198    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 199       return 1024;
 200    case PIPE_CAP_MAX_VERTEX_STREAMS:
 201       return 1;
 202    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 203       return 2048;
 204    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 205    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 206       return 1;
 207    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 208       return 0;
 209    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 210    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 211       return 1;
 212    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 213       return 330;
 214    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 215       return 140;
 216    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 217       return 0;
 218    case PIPE_CAP_COMPUTE:
 219       return 0;
 220    case PIPE_CAP_USER_VERTEX_BUFFERS:
 221       return 1;
 222    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 223    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 224    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 225    case PIPE_CAP_TGSI_TEXCOORD:
 226       return 0;
 227    case PIPE_CAP_DRAW_INDIRECT:
 228       return 1;
 229
 230    case PIPE_CAP_CUBE_MAP_ARRAY:
 231       return 1;
 232    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 233       return 16;
 234    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 235       return 0;
 236    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 237       return 64;
 238    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 239       return 1;
 240    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 241       return 65536;
 242    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 243       return 1;
 244    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 245       return 0;
 246    case PIPE_CAP_MAX_VIEWPORTS:
 247       return PIPE_MAX_VIEWPORTS;
 248    case PIPE_CAP_ENDIANNESS:
 249       return PIPE_ENDIAN_NATIVE;
 250    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 251       return 1;
 252    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 253       return 1;
 254    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 255       return 4;
 256    case PIPE_CAP_TEXTURE_GATHER_SM5:
 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    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 264       return 0;
 265    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 266       return 1;
 267    case PIPE_CAP_FAKE_SW_MSAA:
 268       return 1;
 269    case PIPE_CAP_TEXTURE_QUERY_LOD:
 270    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 271    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 272    case PIPE_CAP_DOUBLES:
 273    case PIPE_CAP_INT64:
 274    case PIPE_CAP_INT64_DIVMOD:
 275    case PIPE_CAP_QUERY_SO_OVERFLOW:
 276    case PIPE_CAP_TGSI_DIV:
 277       return 1;
 278
 279    case PIPE_CAP_VENDOR_ID:
 280       return 0xFFFFFFFF;
 281    case PIPE_CAP_DEVICE_ID:
 282       return 0xFFFFFFFF;
 283    case PIPE_CAP_ACCELERATED:
 284       return 0;
 285    case PIPE_CAP_VIDEO_MEMORY: {
 286       /* XXX: Do we want to return the full amount fo system memory ? */
 287       uint64_t system_memory;
 288
 289       if (!os_get_total_physical_memory(&system_memory))
 290          return 0;
 291
 292       if (sizeof(void *) == 4)
 293          /* Cap to 2 GB on 32 bits system. We do this because llvmpipe does
 294           * eat application memory, which is quite limited on 32 bits. App
 295           * shouldn't expect too much available memory. */
 296          system_memory = MIN2(system_memory, 2048 << 20);
 297
 298       return (int)(system_memory >> 20);
 299    }
 300    case PIPE_CAP_UMA:
 301       return 0;
 302    case PIPE_CAP_CLIP_HALFZ:
 303       return 1;
 304    case PIPE_CAP_VERTEXID_NOBASE:
 305       return 0;
 306    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 307    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 308    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 309       return 1;
 310    case PIPE_CAP_CULL_DISTANCE:
 311       return 1;
 312    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 313       return 1;
 314    case PIPE_CAP_CLEAR_TEXTURE:
 315       return 1;
 316    case PIPE_CAP_MAX_VARYINGS:
 317       return 32;
 318    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 319       return 1;
 320    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 321    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 322    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 323    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 324    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 325    case PIPE_CAP_TGSI_TXQS:
 326    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 327    case PIPE_CAP_SHAREABLE_SHADERS:
 328    case PIPE_CAP_DRAW_PARAMETERS:
 329    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 330    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 331    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 332    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 333    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 334    case PIPE_CAP_INVALIDATE_BUFFER:
 335    case PIPE_CAP_GENERATE_MIPMAP:
 336    case PIPE_CAP_STRING_MARKER:
 337    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 338    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 339    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 340    case PIPE_CAP_QUERY_MEMORY_INFO:
 341    case PIPE_CAP_PCI_GROUP:
 342    case PIPE_CAP_PCI_BUS:
 343    case PIPE_CAP_PCI_DEVICE:
 344    case PIPE_CAP_PCI_FUNCTION:
 345    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 346    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 347    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 348    case PIPE_CAP_TGSI_VOTE:
 349    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 350    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 351    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 352    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 353    case PIPE_CAP_NATIVE_FENCE_FD:
 354    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 355    case PIPE_CAP_FBFETCH:
 356    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 357    case PIPE_CAP_TGSI_CLOCK:
 358    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 359    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 360    case PIPE_CAP_TGSI_BALLOT:
 361    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 362    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 363    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 364    case PIPE_CAP_POST_DEPTH_COVERAGE:
 365    case PIPE_CAP_BINDLESS_TEXTURE:
 366    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 367    case PIPE_CAP_MEMOBJ:
 368    case PIPE_CAP_LOAD_CONSTBUF:
 369    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 370    case PIPE_CAP_TILE_RASTER_ORDER:
 371    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 372    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 373    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 374    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 375    case PIPE_CAP_FENCE_SIGNAL:
 376    case PIPE_CAP_CONSTBUF0_FLAGS:
 377    case PIPE_CAP_PACKED_UNIFORMS:
 378    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 379    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 380    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 381    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 382    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 383    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 384    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 385       return 0;
 386    case PIPE_CAP_MAX_GS_INVOCATIONS:
 387       return 32;
 388    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 389       return LP_MAX_TGSI_SHADER_BUFFER_SIZE;
 390    default:
 391       return u_pipe_screen_get_param_defaults(screen, param);
 392    }
 393 }
 394
 395 static int
 396 llvmpipe_get_shader_param(struct pipe_screen *screen,
 397                           enum pipe_shader_type shader,
 398                           enum pipe_shader_cap param)
 399 {
 400    switch(shader)
 401    {
 402    case PIPE_SHADER_FRAGMENT:
 403       switch (param) {
 404       default:
 405          return gallivm_get_shader_param(param);
 406       }
 407    case PIPE_SHADER_VERTEX:
 408    case PIPE_SHADER_GEOMETRY:
 409       switch (param) {
 410       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 411          /* At this time, the draw module and llvmpipe driver only
 412           * support vertex shader texture lookups when LLVM is enabled in
 413           * the draw module.
 414           */
 415          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 416             return PIPE_MAX_SAMPLERS;
 417          else
 418             return 0;
 419       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 420          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 421             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 422          else
 423             return 0;
 424       default:
 425          return draw_get_shader_param(shader, param);
 426       }
 427    default:
 428       return 0;
 429    }
 430 }
 431
 432 static float
 433 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 434 {
 435    switch (param) {
 436    case PIPE_CAPF_MAX_LINE_WIDTH:
 437       /* fall-through */
 438    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 439       return 255.0; /* arbitrary */
 440    case PIPE_CAPF_MAX_POINT_WIDTH:
 441       /* fall-through */
 442    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 443       return 255.0; /* arbitrary */
 444    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 445       return 16.0; /* not actually signficant at this time */
 446    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 447       return 16.0; /* arbitrary */
 448    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 449       return 0.0;
 450    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 451       return 0.0;
 452    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 453       return 0.0;
 454    }
 455    /* should only get here on unhandled cases */
 456    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 457    return 0.0;
 458 }
 459
 460
 461 /**
 462  * Query format support for creating a texture, drawing surface, etc.
 463  * \param format  the format to test
 464  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 465  */
 466 static bool
 467 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 468                               enum pipe_format format,
 469                               enum pipe_texture_target target,
 470                               unsigned sample_count,
 471                               unsigned storage_sample_count,
 472                               unsigned bind)
 473 {
 474    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 475    struct sw_winsys *winsys = screen->winsys;
 476    const struct util_format_description *format_desc;
 477
 478    format_desc = util_format_description(format);
 479    if (!format_desc)
 480       return false;
 481
 482    assert(target == PIPE_BUFFER ||
 483           target == PIPE_TEXTURE_1D ||
 484           target == PIPE_TEXTURE_1D_ARRAY ||
 485           target == PIPE_TEXTURE_2D ||
 486           target == PIPE_TEXTURE_2D_ARRAY ||
 487           target == PIPE_TEXTURE_RECT ||
 488           target == PIPE_TEXTURE_3D ||
 489           target == PIPE_TEXTURE_CUBE ||
 490           target == PIPE_TEXTURE_CUBE_ARRAY);
 491
 492    if (sample_count > 1)
 493       return false;
 494
 495    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 496       return false;
 497
 498    if (bind & PIPE_BIND_RENDER_TARGET) {
 499       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 500          /* this is a lie actually other formats COULD exist where we would fail */
 501          if (format_desc->nr_channels < 3)
 502             return false;
 503       }
 504       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 505          return false;
 506
 507       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 508           format != PIPE_FORMAT_R11G11B10_FLOAT)
 509          return false;
 510
 511       assert(format_desc->block.width == 1);
 512       assert(format_desc->block.height == 1);
 513
 514       if (format_desc->is_mixed)
 515          return false;
 516
 517       if (!format_desc->is_array && !format_desc->is_bitmask &&
 518           format != PIPE_FORMAT_R11G11B10_FLOAT)
 519          return false;
 520    }
 521
 522    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 523        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 524       /* Disable all 3-channel formats, where channel size != 32 bits.
 525        * In some cases we run into crashes (in generate_unswizzled_blend()),
 526        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 527        * In any case, disabling the shallower 3-channel formats avoids a
 528        * number of issues with GL_ARB_copy_image support.
 529        */
 530       if (format_desc->is_array &&
 531           format_desc->nr_channels == 3 &&
 532           format_desc->block.bits != 96) {
 533          return false;
 534       }
 535    }
 536
 537    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 538       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 539          return false;
 540    }
 541
 542    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 543       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 544          return false;
 545
 546       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 547          return false;
 548
 549       /* TODO: Support stencil-only formats */
 550       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 551          return false;
 552       }
 553    }
 554
 555    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC ||
 556        format_desc->layout == UTIL_FORMAT_LAYOUT_ATC) {
 557       /* Software decoding is not hooked up. */
 558       return false;
 559    }
 560
 561    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 562        format != PIPE_FORMAT_ETC1_RGB8)
 563       return false;
 564
 565    /*
 566     * Everything can be supported by u_format
 567     * (those without fetch_rgba_float might be not but shouldn't hit that)
 568     */
 569
 570    return true;
 571 }
 572
 573
 574
 575
 576 static void
 577 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 578                            struct pipe_resource *resource,
 579                            unsigned level, unsigned layer,
 580                            void *context_private,
 581                            struct pipe_box *sub_box)
 582 {
 583    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 584    struct sw_winsys *winsys = screen->winsys;
 585    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 586
 587    assert(texture->dt);
 588    if (texture->dt)
 589       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 590 }
 591
 592 static void
 593 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 594 {
 595    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 596    struct sw_winsys *winsys = screen->winsys;
 597
 598    if (screen->rast)
 599       lp_rast_destroy(screen->rast);
 600
 601    lp_jit_screen_cleanup(screen);
 602
 603    if(winsys->destroy)
 604       winsys->destroy(winsys);
 605
 606    mtx_destroy(&screen->rast_mutex);
 607
 608    FREE(screen);
 609 }
 610
 611
 612
 613
 614 /**
 615  * Fence reference counting.
 616  */
 617 static void
 618 llvmpipe_fence_reference(struct pipe_screen *screen,
 619                          struct pipe_fence_handle **ptr,
 620                          struct pipe_fence_handle *fence)
 621 {
 622    struct lp_fence **old = (struct lp_fence **) ptr;
 623    struct lp_fence *f = (struct lp_fence *) fence;
 624
 625    lp_fence_reference(old, f);
 626 }
 627
 628
 629 /**
 630  * Wait for the fence to finish.
 631  */
 632 static bool
 633 llvmpipe_fence_finish(struct pipe_screen *screen,
 634                       struct pipe_context *ctx,
 635                       struct pipe_fence_handle *fence_handle,
 636                       uint64_t timeout)
 637 {
 638    struct lp_fence *f = (struct lp_fence *) fence_handle;
 639
 640    if (!timeout)
 641       return lp_fence_signalled(f);
 642
 643    if (!lp_fence_signalled(f)) {
 644       if (timeout != PIPE_TIMEOUT_INFINITE)
 645          return lp_fence_timedwait(f, timeout);
 646
 647       lp_fence_wait(f);
 648    }
 649    return true;
 650 }
 651
 652 static uint64_t
 653 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 654 {
 655    return os_time_get_nano();
 656 }
 657
 658 /**
 659  * Create a new pipe_screen object
 660  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 661  */
 662 struct pipe_screen *
 663 llvmpipe_create_screen(struct sw_winsys *winsys)
 664 {
 665    struct llvmpipe_screen *screen;
 666
 667    util_cpu_detect();
 668
 669 #ifdef DEBUG
 670    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 671 #endif
 672
 673    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 674
 675    screen = CALLOC_STRUCT(llvmpipe_screen);
 676    if (!screen)
 677       return NULL;
 678
 679    if (!lp_jit_screen_init(screen)) {
 680       FREE(screen);
 681       return NULL;
 682    }
 683
 684    screen->winsys = winsys;
 685
 686    screen->base.destroy = llvmpipe_destroy_screen;
 687
 688    screen->base.get_name = llvmpipe_get_name;
 689    screen->base.get_vendor = llvmpipe_get_vendor;
 690    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 691    screen->base.get_param = llvmpipe_get_param;
 692    screen->base.get_shader_param = llvmpipe_get_shader_param;
 693    screen->base.get_paramf = llvmpipe_get_paramf;
 694    screen->base.is_format_supported = llvmpipe_is_format_supported;
 695
 696    screen->base.context_create = llvmpipe_create_context;
 697    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 698    screen->base.fence_reference = llvmpipe_fence_reference;
 699    screen->base.fence_finish = llvmpipe_fence_finish;
 700
 701    screen->base.get_timestamp = llvmpipe_get_timestamp;
 702
 703    llvmpipe_init_screen_resource_funcs(&screen->base);
 704
 705    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 706 #ifdef EMBEDDED_DEVICE
 707    screen->num_threads = 0;
 708 #endif
 709    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 710    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 711
 712    screen->rast = lp_rast_create(screen->num_threads);
 713    if (!screen->rast) {
 714       lp_jit_screen_cleanup(screen);
 715       FREE(screen);
 716       return NULL;
 717    }
 718    (void) mtx_init(&screen->rast_mutex, mtx_plain);
 719
 720    return &screen->base;
 721 }