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    util_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_SM3:
 116       return 1;
 117    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 118       return 1;
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 120       return PIPE_MAX_SO_BUFFERS;
 121    case PIPE_CAP_ANISOTROPIC_FILTER:
 122       return 0;
 123    case PIPE_CAP_POINT_SPRITE:
 124       return 1;
 125    case PIPE_CAP_MAX_RENDER_TARGETS:
 126       return PIPE_MAX_COLOR_BUFS;
 127    case PIPE_CAP_OCCLUSION_QUERY:
 128       return 1;
 129    case PIPE_CAP_QUERY_TIME_ELAPSED:
 130       return 0;
 131    case PIPE_CAP_QUERY_TIMESTAMP:
 132       return 1;
 133    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 134       return 1;
 135    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 136    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
 137       return 1;
 138    case PIPE_CAP_TEXTURE_SWIZZLE:
 139       return 1;
 140    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 141    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
 142       return 0;
 143    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 144       return LP_MAX_TEXTURE_2D_LEVELS;
 145    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 146       return LP_MAX_TEXTURE_3D_LEVELS;
 147    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 148       return LP_MAX_TEXTURE_CUBE_LEVELS;
 149    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 150       return LP_MAX_TEXTURE_ARRAY_LAYERS;
 151    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 152       return 1;
 153    case PIPE_CAP_INDEP_BLEND_ENABLE:
 154       return 1;
 155    case PIPE_CAP_INDEP_BLEND_FUNC:
 156       return 1;
 157    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 158    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 159    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 160       return 1;
 161    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 162    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 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_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 213       return 140;
 214    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 215       return 0;
 216    case PIPE_CAP_COMPUTE:
 217       return 0;
 218    case PIPE_CAP_USER_VERTEX_BUFFERS:
 219       return 1;
 220    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 221    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 222    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 223    case PIPE_CAP_TGSI_TEXCOORD:
 224       return 0;
 225    case PIPE_CAP_DRAW_INDIRECT:
 226       return 1;
 227
 228    case PIPE_CAP_CUBE_MAP_ARRAY:
 229       return 1;
 230    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 231       return 16;
 232    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 233       return 0;
 234    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 235       return 64;
 236    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 237       return 1;
 238    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 239       return 65536;
 240    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 241       return 1;
 242    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 243       return 0;
 244    case PIPE_CAP_MAX_VIEWPORTS:
 245       return PIPE_MAX_VIEWPORTS;
 246    case PIPE_CAP_ENDIANNESS:
 247       return PIPE_ENDIAN_NATIVE;
 248    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 249       return 1;
 250    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 251       return 1;
 252    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 253       return 4;
 254    case PIPE_CAP_TEXTURE_GATHER_SM5:
 255    case PIPE_CAP_SAMPLE_SHADING:
 256    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 257       return 0;
 258    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 259       return 1;
 260    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 261    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 262       return 0;
 263    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 264       return 1;
 265    case PIPE_CAP_FAKE_SW_MSAA:
 266       return 1;
 267    case PIPE_CAP_TEXTURE_QUERY_LOD:
 268    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 269    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 270    case PIPE_CAP_DOUBLES:
 271    case PIPE_CAP_INT64:
 272    case PIPE_CAP_INT64_DIVMOD:
 273    case PIPE_CAP_QUERY_SO_OVERFLOW:
 274       return 1;
 275
 276    case PIPE_CAP_VENDOR_ID:
 277       return 0xFFFFFFFF;
 278    case PIPE_CAP_DEVICE_ID:
 279       return 0xFFFFFFFF;
 280    case PIPE_CAP_ACCELERATED:
 281       return 0;
 282    case PIPE_CAP_VIDEO_MEMORY: {
 283       /* XXX: Do we want to return the full amount fo system memory ? */
 284       uint64_t system_memory;
 285
 286       if (!os_get_total_physical_memory(&system_memory))
 287          return 0;
 288
 289       if (sizeof(void *) == 4)
 290          /* Cap to 2 GB on 32 bits system. We do this because llvmpipe does
 291           * eat application memory, which is quite limited on 32 bits. App
 292           * shouldn't expect too much available memory. */
 293          system_memory = MIN2(system_memory, 2048 << 20);
 294
 295       return (int)(system_memory >> 20);
 296    }
 297    case PIPE_CAP_UMA:
 298       return 0;
 299    case PIPE_CAP_CLIP_HALFZ:
 300       return 1;
 301    case PIPE_CAP_VERTEXID_NOBASE:
 302       return 0;
 303    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 304    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 305    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 306       return 1;
 307    case PIPE_CAP_CULL_DISTANCE:
 308       return 1;
 309    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 310       return 1;
 311    case PIPE_CAP_CLEAR_TEXTURE:
 312       return 1;
 313    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 314    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 315    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 316    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 317    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 318    case PIPE_CAP_TGSI_TXQS:
 319    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 320    case PIPE_CAP_SHAREABLE_SHADERS:
 321    case PIPE_CAP_DRAW_PARAMETERS:
 322    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 323    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 324    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 325    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 326    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 327    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 328    case PIPE_CAP_INVALIDATE_BUFFER:
 329    case PIPE_CAP_GENERATE_MIPMAP:
 330    case PIPE_CAP_STRING_MARKER:
 331    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 332    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 333    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 334    case PIPE_CAP_QUERY_MEMORY_INFO:
 335    case PIPE_CAP_PCI_GROUP:
 336    case PIPE_CAP_PCI_BUS:
 337    case PIPE_CAP_PCI_DEVICE:
 338    case PIPE_CAP_PCI_FUNCTION:
 339    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 340    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 341    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 342    case PIPE_CAP_TGSI_VOTE:
 343    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 344    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 345    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 346    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 347    case PIPE_CAP_NATIVE_FENCE_FD:
 348    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 349    case PIPE_CAP_TGSI_FS_FBFETCH:
 350    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 351    case PIPE_CAP_TGSI_CLOCK:
 352    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 353    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 354    case PIPE_CAP_TGSI_BALLOT:
 355    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 356    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 357    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 358    case PIPE_CAP_POST_DEPTH_COVERAGE:
 359    case PIPE_CAP_BINDLESS_TEXTURE:
 360    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 361    case PIPE_CAP_MEMOBJ:
 362    case PIPE_CAP_LOAD_CONSTBUF:
 363    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 364    case PIPE_CAP_TILE_RASTER_ORDER:
 365    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 366    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 367    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 368    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 369    case PIPE_CAP_FENCE_SIGNAL:
 370    case PIPE_CAP_CONSTBUF0_FLAGS:
 371    case PIPE_CAP_PACKED_UNIFORMS:
 372    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 373    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 374    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 375    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 376    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 377    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 378    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 379       return 0;
 380    case PIPE_CAP_MAX_GS_INVOCATIONS:
 381       return 32;
 382    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 383       return 1 << 27;
 384
 385    default:
 386       return u_pipe_screen_get_param_defaults(screen, param);
 387    }
 388 }
 389
 390 static int
 391 llvmpipe_get_shader_param(struct pipe_screen *screen,
 392                           enum pipe_shader_type shader,
 393                           enum pipe_shader_cap param)
 394 {
 395    switch(shader)
 396    {
 397    case PIPE_SHADER_FRAGMENT:
 398       switch (param) {
 399       default:
 400          return gallivm_get_shader_param(param);
 401       }
 402    case PIPE_SHADER_VERTEX:
 403    case PIPE_SHADER_GEOMETRY:
 404       switch (param) {
 405       case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 406          /* At this time, the draw module and llvmpipe driver only
 407           * support vertex shader texture lookups when LLVM is enabled in
 408           * the draw module.
 409           */
 410          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 411             return PIPE_MAX_SAMPLERS;
 412          else
 413             return 0;
 414       case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 415          if (debug_get_bool_option("DRAW_USE_LLVM", TRUE))
 416             return PIPE_MAX_SHADER_SAMPLER_VIEWS;
 417          else
 418             return 0;
 419       default:
 420          return draw_get_shader_param(shader, param);
 421       }
 422    default:
 423       return 0;
 424    }
 425 }
 426
 427 static float
 428 llvmpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 429 {
 430    switch (param) {
 431    case PIPE_CAPF_MAX_LINE_WIDTH:
 432       /* fall-through */
 433    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 434       return 255.0; /* arbitrary */
 435    case PIPE_CAPF_MAX_POINT_WIDTH:
 436       /* fall-through */
 437    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 438       return 255.0; /* arbitrary */
 439    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 440       return 16.0; /* not actually signficant at this time */
 441    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 442       return 16.0; /* arbitrary */
 443    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 444       return 0.0;
 445    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 446       return 0.0;
 447    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 448       return 0.0;
 449    }
 450    /* should only get here on unhandled cases */
 451    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 452    return 0.0;
 453 }
 454
 455
 456 /**
 457  * Query format support for creating a texture, drawing surface, etc.
 458  * \param format  the format to test
 459  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 460  */
 461 static boolean
 462 llvmpipe_is_format_supported( struct pipe_screen *_screen,
 463                               enum pipe_format format,
 464                               enum pipe_texture_target target,
 465                               unsigned sample_count,
 466                               unsigned storage_sample_count,
 467                               unsigned bind)
 468 {
 469    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 470    struct sw_winsys *winsys = screen->winsys;
 471    const struct util_format_description *format_desc;
 472
 473    format_desc = util_format_description(format);
 474    if (!format_desc)
 475       return FALSE;
 476
 477    assert(target == PIPE_BUFFER ||
 478           target == PIPE_TEXTURE_1D ||
 479           target == PIPE_TEXTURE_1D_ARRAY ||
 480           target == PIPE_TEXTURE_2D ||
 481           target == PIPE_TEXTURE_2D_ARRAY ||
 482           target == PIPE_TEXTURE_RECT ||
 483           target == PIPE_TEXTURE_3D ||
 484           target == PIPE_TEXTURE_CUBE ||
 485           target == PIPE_TEXTURE_CUBE_ARRAY);
 486
 487    if (sample_count > 1)
 488       return FALSE;
 489
 490    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 491       return false;
 492
 493    if (bind & PIPE_BIND_RENDER_TARGET) {
 494       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) {
 495          /* this is a lie actually other formats COULD exist where we would fail */
 496          if (format_desc->nr_channels < 3)
 497             return FALSE;
 498       }
 499       else if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB)
 500          return FALSE;
 501
 502       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN &&
 503           format != PIPE_FORMAT_R11G11B10_FLOAT)
 504          return FALSE;
 505
 506       assert(format_desc->block.width == 1);
 507       assert(format_desc->block.height == 1);
 508
 509       if (format_desc->is_mixed)
 510          return FALSE;
 511
 512       if (!format_desc->is_array && !format_desc->is_bitmask &&
 513           format != PIPE_FORMAT_R11G11B10_FLOAT)
 514          return FALSE;
 515    }
 516
 517    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 518        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0)) {
 519       /* Disable all 3-channel formats, where channel size != 32 bits.
 520        * In some cases we run into crashes (in generate_unswizzled_blend()),
 521        * for 3-channel RGB16 variants, there was an apparent LLVM bug.
 522        * In any case, disabling the shallower 3-channel formats avoids a
 523        * number of issues with GL_ARB_copy_image support.
 524        */
 525       if (format_desc->is_array &&
 526           format_desc->nr_channels == 3 &&
 527           format_desc->block.bits != 96) {
 528          return FALSE;
 529       }
 530    }
 531
 532    if (bind & PIPE_BIND_DISPLAY_TARGET) {
 533       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 534          return FALSE;
 535    }
 536
 537    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 538       if (format_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 539          return FALSE;
 540
 541       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 542          return FALSE;
 543
 544       /* TODO: Support stencil-only formats */
 545       if (format_desc->swizzle[0] == PIPE_SWIZZLE_NONE) {
 546          return FALSE;
 547       }
 548    }
 549
 550    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 551       /* Software decoding is not hooked up. */
 552       return FALSE;
 553    }
 554
 555    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 556        format != PIPE_FORMAT_ETC1_RGB8)
 557       return FALSE;
 558
 559    /*
 560     * Everything can be supported by u_format
 561     * (those without fetch_rgba_float might be not but shouldn't hit that)
 562     */
 563
 564    return TRUE;
 565 }
 566
 567
 568
 569
 570 static void
 571 llvmpipe_flush_frontbuffer(struct pipe_screen *_screen,
 572                            struct pipe_resource *resource,
 573                            unsigned level, unsigned layer,
 574                            void *context_private,
 575                            struct pipe_box *sub_box)
 576 {
 577    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 578    struct sw_winsys *winsys = screen->winsys;
 579    struct llvmpipe_resource *texture = llvmpipe_resource(resource);
 580
 581    assert(texture->dt);
 582    if (texture->dt)
 583       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 584 }
 585
 586 static void
 587 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 588 {
 589    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 590    struct sw_winsys *winsys = screen->winsys;
 591
 592    if (screen->rast)
 593       lp_rast_destroy(screen->rast);
 594
 595    lp_jit_screen_cleanup(screen);
 596
 597    if(winsys->destroy)
 598       winsys->destroy(winsys);
 599
 600    mtx_destroy(&screen->rast_mutex);
 601
 602    FREE(screen);
 603 }
 604
 605
 606
 607
 608 /**
 609  * Fence reference counting.
 610  */
 611 static void
 612 llvmpipe_fence_reference(struct pipe_screen *screen,
 613                          struct pipe_fence_handle **ptr,
 614                          struct pipe_fence_handle *fence)
 615 {
 616    struct lp_fence **old = (struct lp_fence **) ptr;
 617    struct lp_fence *f = (struct lp_fence *) fence;
 618
 619    lp_fence_reference(old, f);
 620 }
 621
 622
 623 /**
 624  * Wait for the fence to finish.
 625  */
 626 static boolean
 627 llvmpipe_fence_finish(struct pipe_screen *screen,
 628                       struct pipe_context *ctx,
 629                       struct pipe_fence_handle *fence_handle,
 630                       uint64_t timeout)
 631 {
 632    struct lp_fence *f = (struct lp_fence *) fence_handle;
 633
 634    if (!timeout)
 635       return lp_fence_signalled(f);
 636
 637    lp_fence_wait(f);
 638    return TRUE;
 639 }
 640
 641 static uint64_t
 642 llvmpipe_get_timestamp(struct pipe_screen *_screen)
 643 {
 644    return os_time_get_nano();
 645 }
 646
 647 /**
 648  * Create a new pipe_screen object
 649  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 650  */
 651 struct pipe_screen *
 652 llvmpipe_create_screen(struct sw_winsys *winsys)
 653 {
 654    struct llvmpipe_screen *screen;
 655
 656    util_cpu_detect();
 657
 658 #ifdef DEBUG
 659    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );
 660 #endif
 661
 662    LP_PERF = debug_get_flags_option("LP_PERF", lp_perf_flags, 0 );
 663
 664    screen = CALLOC_STRUCT(llvmpipe_screen);
 665    if (!screen)
 666       return NULL;
 667
 668    if (!lp_jit_screen_init(screen)) {
 669       FREE(screen);
 670       return NULL;
 671    }
 672
 673    screen->winsys = winsys;
 674
 675    screen->base.destroy = llvmpipe_destroy_screen;
 676
 677    screen->base.get_name = llvmpipe_get_name;
 678    screen->base.get_vendor = llvmpipe_get_vendor;
 679    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
 680    screen->base.get_param = llvmpipe_get_param;
 681    screen->base.get_shader_param = llvmpipe_get_shader_param;
 682    screen->base.get_paramf = llvmpipe_get_paramf;
 683    screen->base.is_format_supported = llvmpipe_is_format_supported;
 684
 685    screen->base.context_create = llvmpipe_create_context;
 686    screen->base.flush_frontbuffer = llvmpipe_flush_frontbuffer;
 687    screen->base.fence_reference = llvmpipe_fence_reference;
 688    screen->base.fence_finish = llvmpipe_fence_finish;
 689
 690    screen->base.get_timestamp = llvmpipe_get_timestamp;
 691
 692    llvmpipe_init_screen_resource_funcs(&screen->base);
 693
 694    screen->num_threads = util_cpu_caps.nr_cpus > 1 ? util_cpu_caps.nr_cpus : 0;
 695 #ifdef PIPE_SUBSYSTEM_EMBEDDED
 696    screen->num_threads = 0;
 697 #endif
 698    screen->num_threads = debug_get_num_option("LP_NUM_THREADS", screen->num_threads);
 699    screen->num_threads = MIN2(screen->num_threads, LP_MAX_THREADS);
 700
 701    screen->rast = lp_rast_create(screen->num_threads);
 702    if (!screen->rast) {
 703       lp_jit_screen_cleanup(screen);
 704       FREE(screen);
 705       return NULL;
 706    }
 707    (void) mtx_init(&screen->rast_mutex, mtx_plain);
 708
 709    return &screen->base;
 710 }