src/gallium/drivers/softpipe/sp_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_format.h"
  31 #include "util/u_format_s3tc.h"
  32 #include "util/u_screen.h"
  33 #include "util/u_video.h"
  34 #include "util/os_misc.h"
  35 #include "util/os_time.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_screen.h"
  38 #include "draw/draw_context.h"
  39
  40 #include "state_tracker/sw_winsys.h"
  41 #include "tgsi/tgsi_exec.h"
  42
  43 #include "sp_texture.h"
  44 #include "sp_screen.h"
  45 #include "sp_context.h"
  46 #include "sp_fence.h"
  47 #include "sp_public.h"
  48
  49 DEBUG_GET_ONCE_BOOL_OPTION(use_llvm, "SOFTPIPE_USE_LLVM", FALSE)
  50
  51 static const char *
  52 softpipe_get_vendor(struct pipe_screen *screen)
  53 {
  54    return "VMware, Inc.";
  55 }
  56
  57
  58 static const char *
  59 softpipe_get_name(struct pipe_screen *screen)
  60 {
  61    return "softpipe";
  62 }
  63
  64
  65 static int
  66 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
  67 {
  68    struct softpipe_screen *sp_screen = softpipe_screen(screen);
  69    switch (param) {
  70    case PIPE_CAP_NPOT_TEXTURES:
  71    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  72    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
  73       return 1;
  74    case PIPE_CAP_SM3:
  75       return 1;
  76    case PIPE_CAP_ANISOTROPIC_FILTER:
  77       return 1;
  78    case PIPE_CAP_POINT_SPRITE:
  79       return 1;
  80    case PIPE_CAP_MAX_RENDER_TARGETS:
  81       return PIPE_MAX_COLOR_BUFS;
  82    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  83       return 1;
  84    case PIPE_CAP_OCCLUSION_QUERY:
  85       return 1;
  86    case PIPE_CAP_QUERY_TIME_ELAPSED:
  87       return 1;
  88    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
  89       return 1;
  90    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  91    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  92       return 1;
  93    case PIPE_CAP_TEXTURE_SWIZZLE:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
  96    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
  97       return 0;
  98    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  99       return SP_MAX_TEXTURE_2D_LEVELS;
 100    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 101       return SP_MAX_TEXTURE_3D_LEVELS;
 102    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 103       return SP_MAX_TEXTURE_CUBE_LEVELS;
 104    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 105       return 1;
 106    case PIPE_CAP_INDEP_BLEND_ENABLE:
 107       return 1;
 108    case PIPE_CAP_INDEP_BLEND_FUNC:
 109       return 1;
 110    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 111    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 112    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 113    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 114       return 1;
 115    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 116       return 1;
 117    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 118       return PIPE_MAX_SO_BUFFERS;
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 120    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 121       return 16*4;
 122    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 123    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 124       return 1024;
 125    case PIPE_CAP_MAX_VERTEX_STREAMS:
 126       if (sp_screen->use_llvm)
 127          return 1;
 128       else
 129          return PIPE_MAX_VERTEX_STREAMS;
 130    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 131       return 2048;
 132    case PIPE_CAP_PRIMITIVE_RESTART:
 133       return 1;
 134    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 135       return 1;
 136    case PIPE_CAP_TGSI_ATOMFADD:
 137    case PIPE_CAP_TGSI_INSTANCEID:
 138    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 139    case PIPE_CAP_START_INSTANCE:
 140       return 1;
 141    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 142    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 143       return 1;
 144    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 145       return 256; /* for GL3 */
 146    case PIPE_CAP_MIN_TEXEL_OFFSET:
 147       return -8;
 148    case PIPE_CAP_MAX_TEXEL_OFFSET:
 149       return 7;
 150    case PIPE_CAP_CONDITIONAL_RENDER:
 151       return 1;
 152    case PIPE_CAP_TEXTURE_BARRIER:
 153    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 154       return 0;
 155    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 156    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 157    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 158       return 1;
 159    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 160       return 1;
 161    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 162       return 330;
 163    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 164       return 140;
 165    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 166    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 167       return 0;
 168    case PIPE_CAP_COMPUTE:
 169       return 1;
 170    case PIPE_CAP_USER_VERTEX_BUFFERS:
 171    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 172    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 173    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 174    case PIPE_CAP_DOUBLES:
 175    case PIPE_CAP_INT64:
 176    case PIPE_CAP_INT64_DIVMOD:
 177       return 1;
 178    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 179       return 16;
 180    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 181    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 182    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 183    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 184    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 185       return 0;
 186    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 187       return 64;
 188    case PIPE_CAP_QUERY_TIMESTAMP:
 189    case PIPE_CAP_CUBE_MAP_ARRAY:
 190       return 1;
 191    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 192       return 1;
 193    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 194       return 0;
 195    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 196       return 65536;
 197    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 198       return 0;
 199    case PIPE_CAP_TGSI_TEXCOORD:
 200    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 201       return 0;
 202    case PIPE_CAP_MAX_VIEWPORTS:
 203       return PIPE_MAX_VIEWPORTS;
 204    case PIPE_CAP_ENDIANNESS:
 205       return PIPE_ENDIAN_NATIVE;
 206    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 207       return 4;
 208    case PIPE_CAP_TEXTURE_GATHER_SM5:
 209    case PIPE_CAP_TEXTURE_QUERY_LOD:
 210       return 1;
 211    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 212    case PIPE_CAP_SAMPLE_SHADING:
 213    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 214       return 0;
 215    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 216       return 1;
 217    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 218       return 0;
 219    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 220       return 1;
 221    case PIPE_CAP_FAKE_SW_MSAA:
 222       return 1;
 223    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 224       return -32;
 225    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 226       return 31;
 227    case PIPE_CAP_DRAW_INDIRECT:
 228       return 1;
 229    case PIPE_CAP_QUERY_SO_OVERFLOW:
 230       return 1;
 231
 232    case PIPE_CAP_VENDOR_ID:
 233       return 0xFFFFFFFF;
 234    case PIPE_CAP_DEVICE_ID:
 235       return 0xFFFFFFFF;
 236    case PIPE_CAP_ACCELERATED:
 237       return 0;
 238    case PIPE_CAP_VIDEO_MEMORY: {
 239       /* XXX: Do we want to return the full amount fo system memory ? */
 240       uint64_t system_memory;
 241
 242       if (!os_get_total_physical_memory(&system_memory))
 243          return 0;
 244
 245       if (sizeof(void *) == 4)
 246          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
 247           * eat application memory, which is quite limited on 32 bits. App
 248           * shouldn't expect too much available memory. */
 249          system_memory = MIN2(system_memory, 2048 << 20);
 250
 251       return (int)(system_memory >> 20);
 252    }
 253    case PIPE_CAP_UMA:
 254       return 0;
 255    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 256       return 1;
 257    case PIPE_CAP_CLIP_HALFZ:
 258    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 259    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 260       return 1;
 261    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 262    case PIPE_CAP_CULL_DISTANCE:
 263       return 1;
 264    case PIPE_CAP_VERTEXID_NOBASE:
 265       return 0;
 266    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 267       return 0;
 268    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 269    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 270       return 1;
 271    case PIPE_CAP_CLEAR_TEXTURE:
 272       return 1;
 273    case PIPE_CAP_MAX_VARYINGS:
 274       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
 275    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 276    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 277    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 278    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 279    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 280    case PIPE_CAP_TGSI_TXQS:
 281    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 282    case PIPE_CAP_SHAREABLE_SHADERS:
 283    case PIPE_CAP_DRAW_PARAMETERS:
 284    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 285    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 286    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 287    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 288    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 289    case PIPE_CAP_INVALIDATE_BUFFER:
 290    case PIPE_CAP_GENERATE_MIPMAP:
 291    case PIPE_CAP_STRING_MARKER:
 292    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 293    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 294    case PIPE_CAP_QUERY_MEMORY_INFO:
 295    case PIPE_CAP_PCI_GROUP:
 296    case PIPE_CAP_PCI_BUS:
 297    case PIPE_CAP_PCI_DEVICE:
 298    case PIPE_CAP_PCI_FUNCTION:
 299    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 300    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 301    case PIPE_CAP_TGSI_VOTE:
 302    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 303    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 304    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 305    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 306    case PIPE_CAP_NATIVE_FENCE_FD:
 307    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 308    case PIPE_CAP_TGSI_FS_FBFETCH:
 309    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 310    case PIPE_CAP_TGSI_CLOCK:
 311    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 312    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 313    case PIPE_CAP_TGSI_BALLOT:
 314    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 315    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 316    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 317    case PIPE_CAP_POST_DEPTH_COVERAGE:
 318    case PIPE_CAP_BINDLESS_TEXTURE:
 319    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 320    case PIPE_CAP_MEMOBJ:
 321    case PIPE_CAP_LOAD_CONSTBUF:
 322    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 323    case PIPE_CAP_TILE_RASTER_ORDER:
 324    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 325    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 326    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 327    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 328    case PIPE_CAP_FENCE_SIGNAL:
 329    case PIPE_CAP_CONSTBUF0_FLAGS:
 330    case PIPE_CAP_PACKED_UNIFORMS:
 331    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 332    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 333    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 334    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 335    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 336    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 337    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 338       return 0;
 339    case PIPE_CAP_MAX_GS_INVOCATIONS:
 340       return 32;
 341    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 342       return 1 << 27;
 343    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 344       return 4;
 345    default:
 346       return u_pipe_screen_get_param_defaults(screen, param);
 347    }
 348 }
 349
 350 static int
 351 softpipe_get_shader_param(struct pipe_screen *screen,
 352                           enum pipe_shader_type shader,
 353                           enum pipe_shader_cap param)
 354 {
 355    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 356    switch(shader)
 357    {
 358    case PIPE_SHADER_FRAGMENT:
 359       return tgsi_exec_get_shader_param(param);
 360    case PIPE_SHADER_COMPUTE:
 361       return tgsi_exec_get_shader_param(param);
 362    case PIPE_SHADER_VERTEX:
 363    case PIPE_SHADER_GEOMETRY:
 364       if (sp_screen->use_llvm)
 365          return draw_get_shader_param(shader, param);
 366       else
 367          return draw_get_shader_param_no_llvm(shader, param);
 368    default:
 369       return 0;
 370    }
 371 }
 372
 373 static float
 374 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 375 {
 376    switch (param) {
 377    case PIPE_CAPF_MAX_LINE_WIDTH:
 378       /* fall-through */
 379    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 380       return 255.0; /* arbitrary */
 381    case PIPE_CAPF_MAX_POINT_WIDTH:
 382       /* fall-through */
 383    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 384       return 255.0; /* arbitrary */
 385    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 386       return 16.0;
 387    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 388       return 16.0; /* arbitrary */
 389    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 390       return 0.0;
 391    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 392       return 0.0;
 393    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 394       return 0.0;
 395    }
 396    /* should only get here on unhandled cases */
 397    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 398    return 0.0;
 399 }
 400
 401 /**
 402  * Query format support for creating a texture, drawing surface, etc.
 403  * \param format  the format to test
 404  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 405  */
 406 static boolean
 407 softpipe_is_format_supported( struct pipe_screen *screen,
 408                               enum pipe_format format,
 409                               enum pipe_texture_target target,
 410                               unsigned sample_count,
 411                               unsigned storage_sample_count,
 412                               unsigned bind)
 413 {
 414    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 415    const struct util_format_description *format_desc;
 416
 417    assert(target == PIPE_BUFFER ||
 418           target == PIPE_TEXTURE_1D ||
 419           target == PIPE_TEXTURE_1D_ARRAY ||
 420           target == PIPE_TEXTURE_2D ||
 421           target == PIPE_TEXTURE_2D_ARRAY ||
 422           target == PIPE_TEXTURE_RECT ||
 423           target == PIPE_TEXTURE_3D ||
 424           target == PIPE_TEXTURE_CUBE ||
 425           target == PIPE_TEXTURE_CUBE_ARRAY);
 426
 427    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 428       return false;
 429
 430    format_desc = util_format_description(format);
 431    if (!format_desc)
 432       return FALSE;
 433
 434    if (sample_count > 1)
 435       return FALSE;
 436
 437    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 438                PIPE_BIND_SCANOUT |
 439                PIPE_BIND_SHARED)) {
 440       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 441          return FALSE;
 442    }
 443
 444    if (bind & PIPE_BIND_RENDER_TARGET) {
 445       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 446          return FALSE;
 447
 448       /*
 449        * Although possible, it is unnatural to render into compressed or YUV
 450        * surfaces. So disable these here to avoid going into weird paths
 451        * inside the state trackers.
 452        */
 453       if (format_desc->block.width != 1 ||
 454           format_desc->block.height != 1)
 455          return FALSE;
 456    }
 457
 458    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 459       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 460          return FALSE;
 461    }
 462
 463    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC) {
 464       /* Software decoding is not hooked up. */
 465       return FALSE;
 466    }
 467
 468    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 469        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0) &&
 470        target != PIPE_BUFFER) {
 471       const struct util_format_description *desc =
 472          util_format_description(format);
 473       if (desc->nr_channels == 3 && desc->is_array) {
 474          /* Don't support any 3-component formats for rendering/texturing
 475           * since we don't support the corresponding 8-bit 3 channel UNORM
 476           * formats.  This allows us to support GL_ARB_copy_image between
 477           * GL_RGB8 and GL_RGB8UI, for example.  Otherwise, we may be asked to
 478           * do a resource copy between PIPE_FORMAT_R8G8B8_UINT and
 479           * PIPE_FORMAT_R8G8B8X8_UNORM, for example, which will not work
 480           * (different bpp).
 481           */
 482          return FALSE;
 483       }
 484    }
 485
 486    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 487        format != PIPE_FORMAT_ETC1_RGB8)
 488       return FALSE;
 489
 490    /*
 491     * All other operations (sampling, transfer, etc).
 492     */
 493
 494    /*
 495     * Everything else should be supported by u_format.
 496     */
 497    return TRUE;
 498 }
 499
 500
 501 static void
 502 softpipe_destroy_screen( struct pipe_screen *screen )
 503 {
 504    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 505    struct sw_winsys *winsys = sp_screen->winsys;
 506
 507    if(winsys->destroy)
 508       winsys->destroy(winsys);
 509
 510    FREE(screen);
 511 }
 512
 513
 514 /* This is often overriden by the co-state tracker.
 515  */
 516 static void
 517 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 518                            struct pipe_resource *resource,
 519                            unsigned level, unsigned layer,
 520                            void *context_private,
 521                            struct pipe_box *sub_box)
 522 {
 523    struct softpipe_screen *screen = softpipe_screen(_screen);
 524    struct sw_winsys *winsys = screen->winsys;
 525    struct softpipe_resource *texture = softpipe_resource(resource);
 526
 527    assert(texture->dt);
 528    if (texture->dt)
 529       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 530 }
 531
 532 static uint64_t
 533 softpipe_get_timestamp(struct pipe_screen *_screen)
 534 {
 535    return os_time_get_nano();
 536 }
 537
 538 static int
 539 softpipe_get_compute_param(struct pipe_screen *_screen,
 540                            enum pipe_shader_ir ir_type,
 541                            enum pipe_compute_cap param,
 542                            void *ret)
 543 {
 544    switch (param) {
 545    case PIPE_COMPUTE_CAP_IR_TARGET:
 546       return 0;
 547    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 548       if (ret) {
 549          uint64_t *grid_size = ret;
 550          grid_size[0] = 65535;
 551          grid_size[1] = 65535;
 552          grid_size[2] = 65535;
 553       }
 554       return 3 * sizeof(uint64_t) ;
 555    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 556       if (ret) {
 557          uint64_t *block_size = ret;
 558          block_size[0] = 1024;
 559          block_size[1] = 1024;
 560          block_size[2] = 1024;
 561       }
 562       return 3 * sizeof(uint64_t);
 563    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 564       if (ret) {
 565          uint64_t *max_threads_per_block = ret;
 566          *max_threads_per_block = 1024;
 567       }
 568       return sizeof(uint64_t);
 569    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 570       if (ret) {
 571          uint64_t *max_local_size = ret;
 572          *max_local_size = 32768;
 573       }
 574       return sizeof(uint64_t);
 575    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
 576    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
 577    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
 578    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
 579    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
 580    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
 581    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
 582    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
 583    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
 584    case PIPE_COMPUTE_CAP_ADDRESS_BITS:
 585    case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
 586       break;
 587    }
 588    return 0;
 589 }
 590
 591 /**
 592  * Create a new pipe_screen object
 593  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 594  */
 595 struct pipe_screen *
 596 softpipe_create_screen(struct sw_winsys *winsys)
 597 {
 598    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 599
 600    if (!screen)
 601       return NULL;
 602
 603    screen->winsys = winsys;
 604
 605    screen->base.destroy = softpipe_destroy_screen;
 606
 607    screen->base.get_name = softpipe_get_name;
 608    screen->base.get_vendor = softpipe_get_vendor;
 609    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
 610    screen->base.get_param = softpipe_get_param;
 611    screen->base.get_shader_param = softpipe_get_shader_param;
 612    screen->base.get_paramf = softpipe_get_paramf;
 613    screen->base.get_timestamp = softpipe_get_timestamp;
 614    screen->base.is_format_supported = softpipe_is_format_supported;
 615    screen->base.context_create = softpipe_create_context;
 616    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 617    screen->base.get_compute_param = softpipe_get_compute_param;
 618    screen->use_llvm = debug_get_option_use_llvm();
 619
 620    softpipe_init_screen_texture_funcs(&screen->base);
 621    softpipe_init_screen_fence_funcs(&screen->base);
 622
 623    return &screen->base;
 624 }