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