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