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/format/u_format.h"
  31 #include "util/format/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 "frontend/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 "Mesa/X.org";
  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_FRAGMENT_SHADER_TEXTURE_LOD:
  75    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
  76    case PIPE_CAP_VERTEX_SHADER_SATURATE:
  77       return 1;
  78    case PIPE_CAP_ANISOTROPIC_FILTER:
  79       return 1;
  80    case PIPE_CAP_POINT_SPRITE:
  81       return 1;
  82    case PIPE_CAP_MAX_RENDER_TARGETS:
  83       return PIPE_MAX_COLOR_BUFS;
  84    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
  85       return 1;
  86    case PIPE_CAP_OCCLUSION_QUERY:
  87       return 1;
  88    case PIPE_CAP_QUERY_TIME_ELAPSED:
  89       return 1;
  90    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
  91       return 1;
  92    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  93    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  94       return 1;
  95    case PIPE_CAP_TEXTURE_SWIZZLE:
  96       return 1;
  97    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
  98    case PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET:
  99       return 0;
 100    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
 101       return 1 << (SP_MAX_TEXTURE_2D_LEVELS - 1);
 102    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 103       return SP_MAX_TEXTURE_3D_LEVELS;
 104    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 105       return SP_MAX_TEXTURE_CUBE_LEVELS;
 106    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 107       return 1;
 108    case PIPE_CAP_INDEP_BLEND_ENABLE:
 109       return 1;
 110    case PIPE_CAP_INDEP_BLEND_FUNC:
 111       return 1;
 112    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 113    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 114    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 115    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 116       return 1;
 117    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 118       return 1;
 119    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 120       return PIPE_MAX_SO_BUFFERS;
 121    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 122    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 123       return 16*4;
 124    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 125    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 126       return 1024;
 127    case PIPE_CAP_MAX_VERTEX_STREAMS:
 128       if (sp_screen->use_llvm)
 129          return 1;
 130       else
 131          return PIPE_MAX_VERTEX_STREAMS;
 132    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 133       return 2048;
 134    case PIPE_CAP_PRIMITIVE_RESTART:
 135    case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
 136       return 1;
 137    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 138       return 1;
 139    case PIPE_CAP_TGSI_ATOMFADD:
 140    case PIPE_CAP_TGSI_INSTANCEID:
 141    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 142    case PIPE_CAP_START_INSTANCE:
 143       return 1;
 144    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 145    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 146       return 1;
 147    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 148       return 256; /* for GL3 */
 149    case PIPE_CAP_MIN_TEXEL_OFFSET:
 150       return -8;
 151    case PIPE_CAP_MAX_TEXEL_OFFSET:
 152       return 7;
 153    case PIPE_CAP_CONDITIONAL_RENDER:
 154       return 1;
 155    case PIPE_CAP_TEXTURE_BARRIER:
 156    case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
 157       return 0;
 158    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 159    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 160    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 161       return 1;
 162    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 163       return 1;
 164    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 165       return 400;
 166    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 167       return 140;
 168    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 169    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 170       return 0;
 171    case PIPE_CAP_COMPUTE:
 172       return 1;
 173    case PIPE_CAP_USER_VERTEX_BUFFERS:
 174    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 175    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 176    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 177    case PIPE_CAP_DOUBLES:
 178    case PIPE_CAP_INT64:
 179    case PIPE_CAP_INT64_DIVMOD:
 180    case PIPE_CAP_TGSI_DIV:
 181       return 1;
 182    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 183       return 16;
 184    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 185    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 186    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 187    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 188    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 189       return 0;
 190    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 191       return 64;
 192    case PIPE_CAP_QUERY_TIMESTAMP:
 193    case PIPE_CAP_CUBE_MAP_ARRAY:
 194       return 1;
 195    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 196       return 1;
 197    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 198       return 0;
 199    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 200       return 65536;
 201    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 202       return 16;
 203    case PIPE_CAP_TGSI_TEXCOORD:
 204    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 205       return 0;
 206    case PIPE_CAP_MAX_VIEWPORTS:
 207       return PIPE_MAX_VIEWPORTS;
 208    case PIPE_CAP_ENDIANNESS:
 209       return PIPE_ENDIAN_NATIVE;
 210    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 211       return 4;
 212    case PIPE_CAP_TEXTURE_GATHER_SM5:
 213    case PIPE_CAP_TEXTURE_QUERY_LOD:
 214       return 1;
 215    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 216    case PIPE_CAP_SAMPLE_SHADING:
 217    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 218       return 0;
 219    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 220       return 1;
 221    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 222       return 1;
 223    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 224       return 1;
 225    case PIPE_CAP_FAKE_SW_MSAA:
 226       return 1;
 227    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 228       return -32;
 229    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 230       return 31;
 231    case PIPE_CAP_DRAW_INDIRECT:
 232       return 1;
 233    case PIPE_CAP_QUERY_SO_OVERFLOW:
 234       return 1;
 235
 236    case PIPE_CAP_VENDOR_ID:
 237       return 0xFFFFFFFF;
 238    case PIPE_CAP_DEVICE_ID:
 239       return 0xFFFFFFFF;
 240    case PIPE_CAP_ACCELERATED:
 241       return 0;
 242    case PIPE_CAP_VIDEO_MEMORY: {
 243       /* XXX: Do we want to return the full amount fo system memory ? */
 244       uint64_t system_memory;
 245
 246       if (!os_get_total_physical_memory(&system_memory))
 247          return 0;
 248
 249       if (sizeof(void *) == 4)
 250          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
 251           * eat application memory, which is quite limited on 32 bits. App
 252           * shouldn't expect too much available memory. */
 253          system_memory = MIN2(system_memory, 2048 << 20);
 254
 255       return (int)(system_memory >> 20);
 256    }
 257    case PIPE_CAP_UMA:
 258       return 0;
 259    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 260       return 1;
 261    case PIPE_CAP_CLIP_HALFZ:
 262    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 263    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 264       return 1;
 265    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 266    case PIPE_CAP_CULL_DISTANCE:
 267       return 1;
 268    case PIPE_CAP_VERTEXID_NOBASE:
 269       return 0;
 270    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 271       return 0;
 272    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 273    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 274       return 1;
 275    case PIPE_CAP_CLEAR_TEXTURE:
 276       return 1;
 277    case PIPE_CAP_MAX_VARYINGS:
 278       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
 279    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 280    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 281    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 282    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 283    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 284    case PIPE_CAP_TGSI_TXQS:
 285    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 286    case PIPE_CAP_SHAREABLE_SHADERS:
 287    case PIPE_CAP_DRAW_PARAMETERS:
 288    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 289    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 290    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 291    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 292    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 293    case PIPE_CAP_INVALIDATE_BUFFER:
 294    case PIPE_CAP_GENERATE_MIPMAP:
 295    case PIPE_CAP_STRING_MARKER:
 296    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 297    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 298    case PIPE_CAP_QUERY_MEMORY_INFO:
 299    case PIPE_CAP_PCI_GROUP:
 300    case PIPE_CAP_PCI_BUS:
 301    case PIPE_CAP_PCI_DEVICE:
 302    case PIPE_CAP_PCI_FUNCTION:
 303    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 304    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 305    case PIPE_CAP_TGSI_VOTE:
 306    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 307    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 308    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 309    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 310    case PIPE_CAP_NATIVE_FENCE_FD:
 311    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 312    case PIPE_CAP_FBFETCH:
 313    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 314    case PIPE_CAP_TGSI_CLOCK:
 315    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 316    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 317    case PIPE_CAP_TGSI_BALLOT:
 318    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 319    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 320    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 321    case PIPE_CAP_POST_DEPTH_COVERAGE:
 322    case PIPE_CAP_BINDLESS_TEXTURE:
 323    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 324    case PIPE_CAP_MEMOBJ:
 325    case PIPE_CAP_LOAD_CONSTBUF:
 326    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 327    case PIPE_CAP_TILE_RASTER_ORDER:
 328    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 329    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 330    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 331    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 332    case PIPE_CAP_FENCE_SIGNAL:
 333    case PIPE_CAP_CONSTBUF0_FLAGS:
 334    case PIPE_CAP_PACKED_UNIFORMS:
 335    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 336    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 337    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 338    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 339    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 340    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 341    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 342       return 0;
 343    case PIPE_CAP_MAX_GS_INVOCATIONS:
 344       return 32;
 345    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 346       return 1 << 27;
 347    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 348       return 4;
 349    default:
 350       return u_pipe_screen_get_param_defaults(screen, param);
 351    }
 352 }
 353
 354 static int
 355 softpipe_get_shader_param(struct pipe_screen *screen,
 356                           enum pipe_shader_type shader,
 357                           enum pipe_shader_cap param)
 358 {
 359    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 360    switch(shader)
 361    {
 362    case PIPE_SHADER_FRAGMENT:
 363       return tgsi_exec_get_shader_param(param);
 364    case PIPE_SHADER_COMPUTE:
 365       return tgsi_exec_get_shader_param(param);
 366    case PIPE_SHADER_VERTEX:
 367    case PIPE_SHADER_GEOMETRY:
 368       if (sp_screen->use_llvm)
 369          return draw_get_shader_param(shader, param);
 370       else
 371          return draw_get_shader_param_no_llvm(shader, param);
 372    default:
 373       return 0;
 374    }
 375 }
 376
 377 static float
 378 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
 379 {
 380    switch (param) {
 381    case PIPE_CAPF_MAX_LINE_WIDTH:
 382       /* fall-through */
 383    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 384       return 255.0; /* arbitrary */
 385    case PIPE_CAPF_MAX_POINT_WIDTH:
 386       /* fall-through */
 387    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 388       return 255.0; /* arbitrary */
 389    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 390       return 16.0;
 391    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 392       return 16.0; /* arbitrary */
 393    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
 394       return 0.0;
 395    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
 396       return 0.0;
 397    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
 398       return 0.0;
 399    }
 400    /* should only get here on unhandled cases */
 401    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
 402    return 0.0;
 403 }
 404
 405 /**
 406  * Query format support for creating a texture, drawing surface, etc.
 407  * \param format  the format to test
 408  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 409  */
 410 static bool
 411 softpipe_is_format_supported( struct pipe_screen *screen,
 412                               enum pipe_format format,
 413                               enum pipe_texture_target target,
 414                               unsigned sample_count,
 415                               unsigned storage_sample_count,
 416                               unsigned bind)
 417 {
 418    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
 419    const struct util_format_description *format_desc;
 420
 421    assert(target == PIPE_BUFFER ||
 422           target == PIPE_TEXTURE_1D ||
 423           target == PIPE_TEXTURE_1D_ARRAY ||
 424           target == PIPE_TEXTURE_2D ||
 425           target == PIPE_TEXTURE_2D_ARRAY ||
 426           target == PIPE_TEXTURE_RECT ||
 427           target == PIPE_TEXTURE_3D ||
 428           target == PIPE_TEXTURE_CUBE ||
 429           target == PIPE_TEXTURE_CUBE_ARRAY);
 430
 431    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
 432       return false;
 433
 434    format_desc = util_format_description(format);
 435    if (!format_desc)
 436       return false;
 437
 438    if (sample_count > 1)
 439       return false;
 440
 441    if (bind & (PIPE_BIND_DISPLAY_TARGET |
 442                PIPE_BIND_SCANOUT |
 443                PIPE_BIND_SHARED)) {
 444       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
 445          return false;
 446    }
 447
 448    if (bind & PIPE_BIND_RENDER_TARGET) {
 449       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
 450          return false;
 451
 452       /*
 453        * Although possible, it is unnatural to render into compressed or YUV
 454        * surfaces. So disable these here to avoid going into weird paths
 455        * inside gallium frontends.
 456        */
 457       if (format_desc->block.width != 1 ||
 458           format_desc->block.height != 1)
 459          return false;
 460    }
 461
 462    if (bind & PIPE_BIND_DEPTH_STENCIL) {
 463       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
 464          return false;
 465    }
 466
 467    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC ||
 468        format_desc->layout == UTIL_FORMAT_LAYOUT_ATC) {
 469       /* Software decoding is not hooked up. */
 470       return false;
 471    }
 472
 473    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
 474        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0) &&
 475        target != PIPE_BUFFER) {
 476       const struct util_format_description *desc =
 477          util_format_description(format);
 478       if (desc->nr_channels == 3 && desc->is_array) {
 479          /* Don't support any 3-component formats for rendering/texturing
 480           * since we don't support the corresponding 8-bit 3 channel UNORM
 481           * formats.  This allows us to support GL_ARB_copy_image between
 482           * GL_RGB8 and GL_RGB8UI, for example.  Otherwise, we may be asked to
 483           * do a resource copy between PIPE_FORMAT_R8G8B8_UINT and
 484           * PIPE_FORMAT_R8G8B8X8_UNORM, for example, which will not work
 485           * (different bpp).
 486           */
 487          return false;
 488       }
 489    }
 490
 491    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
 492        format != PIPE_FORMAT_ETC1_RGB8)
 493       return false;
 494
 495    /*
 496     * All other operations (sampling, transfer, etc).
 497     */
 498
 499    /*
 500     * Everything else should be supported by u_format.
 501     */
 502    return true;
 503 }
 504
 505
 506 static void
 507 softpipe_destroy_screen( struct pipe_screen *screen )
 508 {
 509    struct softpipe_screen *sp_screen = softpipe_screen(screen);
 510    struct sw_winsys *winsys = sp_screen->winsys;
 511
 512    if(winsys->destroy)
 513       winsys->destroy(winsys);
 514
 515    FREE(screen);
 516 }
 517
 518
 519 /* This is often overriden by the co-state tracker.
 520  */
 521 static void
 522 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
 523                            struct pipe_resource *resource,
 524                            unsigned level, unsigned layer,
 525                            void *context_private,
 526                            struct pipe_box *sub_box)
 527 {
 528    struct softpipe_screen *screen = softpipe_screen(_screen);
 529    struct sw_winsys *winsys = screen->winsys;
 530    struct softpipe_resource *texture = softpipe_resource(resource);
 531
 532    assert(texture->dt);
 533    if (texture->dt)
 534       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
 535 }
 536
 537 static uint64_t
 538 softpipe_get_timestamp(struct pipe_screen *_screen)
 539 {
 540    return os_time_get_nano();
 541 }
 542
 543 static int
 544 softpipe_get_compute_param(struct pipe_screen *_screen,
 545                            enum pipe_shader_ir ir_type,
 546                            enum pipe_compute_cap param,
 547                            void *ret)
 548 {
 549    switch (param) {
 550    case PIPE_COMPUTE_CAP_IR_TARGET:
 551       return 0;
 552    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
 553       if (ret) {
 554          uint64_t *grid_size = ret;
 555          grid_size[0] = 65535;
 556          grid_size[1] = 65535;
 557          grid_size[2] = 65535;
 558       }
 559       return 3 * sizeof(uint64_t) ;
 560    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
 561       if (ret) {
 562          uint64_t *block_size = ret;
 563          block_size[0] = 1024;
 564          block_size[1] = 1024;
 565          block_size[2] = 1024;
 566       }
 567       return 3 * sizeof(uint64_t);
 568    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
 569       if (ret) {
 570          uint64_t *max_threads_per_block = ret;
 571          *max_threads_per_block = 1024;
 572       }
 573       return sizeof(uint64_t);
 574    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
 575       if (ret) {
 576          uint64_t *max_local_size = ret;
 577          *max_local_size = 32768;
 578       }
 579       return sizeof(uint64_t);
 580    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
 581    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
 582    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
 583    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
 584    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
 585    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
 586    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
 587    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
 588    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
 589    case PIPE_COMPUTE_CAP_ADDRESS_BITS:
 590    case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
 591       break;
 592    }
 593    return 0;
 594 }
 595
 596 /**
 597  * Create a new pipe_screen object
 598  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
 599  */
 600 struct pipe_screen *
 601 softpipe_create_screen(struct sw_winsys *winsys)
 602 {
 603    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
 604
 605    if (!screen)
 606       return NULL;
 607
 608    screen->winsys = winsys;
 609
 610    screen->base.destroy = softpipe_destroy_screen;
 611
 612    screen->base.get_name = softpipe_get_name;
 613    screen->base.get_vendor = softpipe_get_vendor;
 614    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
 615    screen->base.get_param = softpipe_get_param;
 616    screen->base.get_shader_param = softpipe_get_shader_param;
 617    screen->base.get_paramf = softpipe_get_paramf;
 618    screen->base.get_timestamp = softpipe_get_timestamp;
 619    screen->base.is_format_supported = softpipe_is_format_supported;
 620    screen->base.context_create = softpipe_create_context;
 621    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
 622    screen->base.get_compute_param = softpipe_get_compute_param;
 623    screen->use_llvm = debug_get_option_use_llvm();
 624
 625    softpipe_init_screen_texture_funcs(&screen->base);
 626    softpipe_init_screen_fence_funcs(&screen->base);
 627
 628    return &screen->base;
 629 }