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