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 " MESA_LLVM_VERSION_STRING ", %u bits)",
 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_FRAGMENT_SHADER_TEXTURE_LOD:
 115    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
 116    case PIPE_CAP_VERTEX_SHADER_SATURATE:
 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 1;
 136    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 137    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
 138       return 1;
 139    case PIPE_CAP_TEXTURE_SWIZZLE:
 140       return 1;
 141    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 142    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
 143       return 0;
 144    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
 145       return 1 << (LP_MAX_TEXTURE_2D_LEVELS - 1);
 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    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 164       return 0;
 165    case PIPE_CAP_PRIMITIVE_RESTART:
 166       return 1;
 167    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 168       return 1;
 169    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 170       return 1;
 171    case PIPE_CAP_TGSI_INSTANCEID:
 172    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 173    case PIPE_CAP_START_INSTANCE:
 174       return 1;
 175    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 176       return 0;
 177    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 178       return 1;
 179    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 180    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 181       return 1;
 182    /* this is a lie could support arbitrary large offsets */
 183    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 184    case PIPE_CAP_MIN_TEXEL_OFFSET:
 185       return -32;
 186    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 187    case PIPE_CAP_MAX_TEXEL_OFFSET:
 188       return 31;
 189    case PIPE_CAP_CONDITIONAL_RENDER:
 190       return 1;
 191    case PIPE_CAP_TEXTURE_BARRIER:
 192       return 0;
 193    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 194    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 195       return 16*4;
 196    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 197    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 198       return 1024;
 199    case PIPE_CAP_MAX_VERTEX_STREAMS:
 200       return 1;
 201    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 202       return 2048;
 203    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 204    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 205       return 1;
 206    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 207       return 0;
 208    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 209    case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 210       return 1;
 211    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 212       return 330;
 213    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 214       return 140;
 215    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 216       return 0;
 217    case PIPE_CAP_COMPUTE:
 218       return 0;
 219    case PIPE_CAP_USER_VERTEX_BUFFERS:
 220       return 1;
 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_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    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 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_TEXTURE_QUERY_LOD:
 269    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 270    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 271    case PIPE_CAP_DOUBLES:
 272    case PIPE_CAP_INT64:
 273    case PIPE_CAP_INT64_DIVMOD:
 274    case PIPE_CAP_QUERY_SO_OVERFLOW:
 275    case PIPE_CAP_TGSI_DIV:
 276       return 1;
 277
 278    case PIPE_CAP_VENDOR_ID:
 279       return 0xFFFFFFFF;
 280    case PIPE_CAP_DEVICE_ID:
 281       return 0xFFFFFFFF;
 282    case PIPE_CAP_ACCELERATED:
 283       return 0;
 284    case PIPE_CAP_VIDEO_MEMORY: {
 285       /* XXX: Do we want to return the full amount fo system memory ? */
 286       uint64_t system_memory;
 287
 288       if (!os_get_total_physical_memory(&system_memory))
 289          return 0;
 290
 291       if (sizeof(void *) == 4)
 292          /* Cap to 2 GB on 32 bits system. We do this because llvmpipe does
 293           * eat application memory, which is quite limited on 32 bits. App
 294           * shouldn't expect too much available memory. */
 295          system_memory = MIN2(system_memory, 2048 << 20);
 296
 297       return (int)(system_memory >> 20);
 298    }
 299    case PIPE_CAP_UMA:
 300       return 0;
 301    case PIPE_CAP_CLIP_HALFZ:
 302       return 1;
 303    case PIPE_CAP_VERTEXID_NOBASE:
 304       return 0;
 305    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 306    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 307    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 308       return 1;
 309    case PIPE_CAP_CULL_DISTANCE:
 310       return 1;
 311    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 312       return 1;
 313    case PIPE_CAP_CLEAR_TEXTURE:
 314       return 1;
 315    case PIPE_CAP_MAX_VARYINGS:
 316       return 32;
 317    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 318       return 1;
 319    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 320    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 321    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 322    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 323    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 324    case PIPE_CAP_TGSI_TXQS:
 325    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 326    case PIPE_CAP_SHAREABLE_SHADERS:
 327    case PIPE_CAP_DRAW_PARAMETERS:
 328    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 329    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 330    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 331    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 332    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 333    case PIPE_CAP_INVALIDATE_BUFFER:
 334    case PIPE_CAP_GENERATE_MIPMAP:
 335    case PIPE_CAP_STRING_MARKER:
 336    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 337    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 338    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 339    case PIPE_CAP_QUERY_MEMORY_INFO:
 340    case PIPE_CAP_PCI_GROUP:
 341    case PIPE_CAP_PCI_BUS:
 342    case PIPE_CAP_PCI_DEVICE:
 343    case PIPE_CAP_PCI_FUNCTION:
 344    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 345    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 346    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 347    case PIPE_CAP_TGSI_VOTE:
 348    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 349    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 350    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 351    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 352    case PIPE_CAP_NATIVE_FENCE_FD:
 353    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 354    case PIPE_CAP_FBFETCH:
 355    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 356    case PIPE_CAP_TGSI_CLOCK:
 357    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 358    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 359    case PIPE_CAP_TGSI_BALLOT:
 360    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 361    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 362    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 363    case PIPE_CAP_POST_DEPTH_COVERAGE:
 364    case PIPE_CAP_BINDLESS_TEXTURE:
 365    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 366    case PIPE_CAP_MEMOBJ:
 367    case PIPE_CAP_LOAD_CONSTBUF:
 368    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 369    case PIPE_CAP_TILE_RASTER_ORDER:
 370    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 371    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 372    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 373    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 374    case PIPE_CAP_FENCE_SIGNAL:
 375    case PIPE_CAP_CONSTBUF0_FLAGS:
 376    case PIPE_CAP_PACKED_UNIFORMS:
 377    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 378    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 379    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 380    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 381    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 382    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 383    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 384       return 0;
 385    case PIPE_CAP_MAX_GS_INVOCATIONS:
 386       return 32;
 387    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 388       return LP_MAX_TGSI_SHADER_BUFFER_SIZE;
 389    default:
 390       return u_pipe_screen_get_param_defaults(screen, param);
 391    }
 392 }
 393
 394 static int
 395 llvmpipe_get_shader_param(struct pipe_screen *screen,
 396                           enum pipe_shader_type shader,
 397                           enum pipe_shader_cap param)
 398 {
 399    switch(shader)
 400    {
 401    case PIPE_SHADER_FRAGMENT:
 402       switch (param) {
 403       default:
 404          return gallivm_get_shader_param(param);
 405       }
 406    case PIPE_SHADER_VERTEX:
 407    case PIPE_SHADER_GEOMETRY:
 408       switch (param) {
 409       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 410          /* At this time, the draw module and llvmpipe driver only
 411           * support vertex shader texture lookups when LLVM is enabled in
 412           * the draw module.
 413           */
 414          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 415             return PIPE_MAX_SAMPLERS;
 416          else
 417             return 0;
 418       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 419          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 420             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 421          else
 422             return 0;
 423       default:
 424          return draw_get_shader_param(shader, param);
 425       }
 426    default:
 427       return 0;
 428    }
 429 }
 430
 431 static float
 432 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 433 {
 434    switch (param) {
 435    case PIPE_CAPF_MAX_LINE_WIDTH:
 436       /* fall-through */
 437    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 438       return 255.0; /* arbitrary */
 439    case PIPE_CAPF_MAX_POINT_WIDTH:
 440       /* fall-through */
 441    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 442       return 255.0; /* arbitrary */
 443    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 444       return 16.0; /* not actually signficant at this time */
 445    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 446       return 16.0; /* arbitrary */
 447    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 448       return 0.0;
 449    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 450       return 0.0;
 451    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 452       return 0.0;
 453    }
 454    /* should only get here on unhandled cases */
 455    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 456    return 0.0;
 457 }
 458
 459
 460 /**
 461  * Query format support for creating a texture, drawing surface, etc.
 462  * \param format  the format to test
 463  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 464  */
 465 static bool
 466 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 467                               enum pipe_format format,
 468                               enum pipe_texture_target target,
 469                               unsigned sample_count,
 470                               unsigned storage_sample_count,
 471                               unsigned bind)
 472 {
 473    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 474    struct sw_winsys *winsys = screen->winsys;
 475    const struct util_format_description *format_desc;
 476
 477    format_desc = util_format_description(format);
 478    if (!format_desc)
 479       return false;
 480
 481    assert(target == PIPE_BUFFER ||
 482           target == PIPE_TEXTURE_1D ||
 483           target == PIPE_TEXTURE_1D_ARRAY ||
 484           target == PIPE_TEXTURE_2D ||
 485           target == PIPE_TEXTURE_2D_ARRAY ||
 486           target == PIPE_TEXTURE_RECT ||
 487           target == PIPE_TEXTURE_3D ||
 488           target == PIPE_TEXTURE_CUBE ||
 489           target == PIPE_TEXTURE_CUBE_ARRAY);
 490
 491    if (sample_count > 1)
 492       return false;
 493
 494    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 495       return false;
 496
 497    if (bind & PIPE_BIND_RENDER_TARGET) {
 498       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 499          /* this is a lie actually other formats COULD exist where we would fail */
 500          if (format_desc->nr_channels < 3)
 501             return false;
 502       }
 503       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 504          return false;
 505
 506       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 507           format != PIPE_FORMAT_R11G11B10_FLOAT)
 508          return false;
 509
 510       assert(format_desc->block.width == 1);
 511       assert(format_desc->block.height == 1);
 512
 513       if (format_desc->is_mixed)
 514          return false;
 515
 516       if (!format_desc->is_array && !format_desc->is_bitmask &&
 517           format != PIPE_FORMAT_R11G11B10_FLOAT)
 518          return false;
 519    }
 520
 521    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 522        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 523       /* Disable all 3-channel formats, where channel size != 32 bits.
 524        * In some cases we run into crashes (in generate_unswizzled_blend()),
 525        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 526        * In any case, disabling the shallower 3-channel formats avoids a
 527        * number of issues with GL_ARB_copy_image support.
 528        */
 529       if (format_desc->is_array &&
 530           format_desc->nr_channels == 3 &&
 531           format_desc->block.bits != 96) {
 532          return false;
 533       }
 534    }
 535
 536    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 537       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 538          return false;
 539    }
 540
 541    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 542       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 543          return false;
 544
 545       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 546          return false;
 547
 548       /* TODO: Support stencil-only formats */
 549       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 550          return false;
 551       }
 552    }
 553
 554    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC ||
 555        format_desc->layout == UTIL_FORMAT_LAYOUT_ATC) {
 556       /* Software decoding is not hooked up. */
 557       return false;
 558    }
 559
 560    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 561        format != PIPE_FORMAT_ETC1_RGB8)
 562       return false;
 563
 564    /*
 565     * Everything can be supported by u_format
 566     * (those without fetch_rgba_float might be not but shouldn't hit that)
 567     */
 568
 569    return true;
 570 }
 571
 572
 573
 574
 575 static void
 576 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 577                            struct pipe_resource *resource,
 578                            unsigned level, unsigned layer,
 579                            void *context_private,
 580                            struct pipe_box *sub_box)
 581 {
 582    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 583    struct sw_winsys *winsys = screen->winsys;
 584    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 585
 586    assert(texture->dt);
 587    if (texture->dt)
 588       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 589 }
 590
 591 static void
 592 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 593 {
 594    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 595    struct sw_winsys *winsys = screen->winsys;
 596
 597    if (screen->rast)
 598       lp_rast_destroy(screen->rast);
 599
 600    lp_jit_screen_cleanup(screen);
 601
 602    if(winsys->destroy)
 603       winsys->destroy(winsys);
 604
 605    mtx_destroy(&screen->rast_mutex);
 606
 607    FREE(screen);
 608 }
 609
 610
 611
 612
 613 /**
 614  * Fence reference counting.
 615  */
 616 static void
 617 llvmpipe_fence_reference(struct pipe_screen *screen,
 618                          struct pipe_fence_handle **ptr,
 619                          struct pipe_fence_handle *fence)
 620 {
 621    struct lp_fence **old = (struct lp_fence **) ptr;
 622    struct lp_fence *f = (struct lp_fence *) fence;
 623
 624    lp_fence_reference(old, f);
 625 }
 626
 627
 628 /**
 629  * Wait for the fence to finish.
 630  */
 631 static bool
 632 llvmpipe_fence_finish(struct pipe_screen *screen,
 633                       struct pipe_context *ctx,
 634                       struct pipe_fence_handle *fence_handle,
 635                       uint64_t timeout)
 636 {
 637    struct lp_fence *f = (struct lp_fence *) fence_handle;
 638
 639    if (!timeout)
 640       return lp_fence_signalled(f);
 641
 642    if (!lp_fence_signalled(f)) {
 643       if (timeout != PIPE_TIMEOUT_INFINITE)
 644          return lp_fence_timedwait(f, timeout);
 645
 646       lp_fence_wait(f);
 647    }
 648    return true;
 649 }
 650
 651 static uint64_t
 652 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 653 {
 654    return os_time_get_nano();
 655 }
 656
 657 /**
 658  * Create a new pipe_screen object
 659  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 660  */
 661 struct pipe_screen *
 662 llvmpipe_create_screen(struct sw_winsys *winsys)
 663 {
 664    struct llvmpipe_screen *screen;
 665
 666    util_cpu_detect();
 667
 668 #ifdef DEBUG
 669    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 670 #endif
 671
 672    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 673
 674    screen = CALLOC_STRUCT(llvmpipe_screen);
 675    if (!screen)
 676       return NULL;
 677
 678    if (!lp_jit_screen_init(screen)) {
 679       FREE(screen);
 680       return NULL;
 681    }
 682
 683    screen->winsys = winsys;
 684
 685    screen->base.destroy = llvmpipe_destroy_screen;
 686
 687    screen->base.get_name = llvmpipe_get_name;
 688    screen->base.get_vendor = llvmpipe_get_vendor;
 689    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 690    screen->base.get_param = llvmpipe_get_param;
 691    screen->base.get_shader_param = llvmpipe_get_shader_param;
 692    screen->base.get_paramf = llvmpipe_get_paramf;
 693    screen->base.is_format_supported = llvmpipe_is_format_supported;
 694
 695    screen->base.context_create = llvmpipe_create_context;
 696    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 697    screen->base.fence_reference = llvmpipe_fence_reference;
 698    screen->base.fence_finish = llvmpipe_fence_finish;
 699
 700    screen->base.get_timestamp = llvmpipe_get_timestamp;
 701
 702    llvmpipe_init_screen_resource_funcs(&screen->base);
 703
 704    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 705 #ifdef EMBEDDED_DEVICE
 706    screen->num_threads = 0;
 707 #endif
 708    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 709    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 710
 711    screen->rast = lp_rast_create(screen->num_threads);
 712    if (!screen->rast) {
 713       lp_jit_screen_cleanup(screen);
 714       FREE(screen);
 715       return NULL;
 716    }
 717    (void) mtx_init(&screen->rast_mutex, mtx_plain);
 718
 719    return &screen->base;
 720 }