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