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    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
  90       return 1;
  91    case PIPE_CAP_TEXTURE_SWIZZLE:
  92       return 1;
  93    case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
  94       return 0;
  95    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  96       return SP_MAX_TEXTURE_2D_LEVELS;
  97    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  98       return SP_MAX_TEXTURE_3D_LEVELS;
  99    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 100       return SP_MAX_TEXTURE_CUBE_LEVELS;
 101    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 102       return 1;
 103    case PIPE_CAP_INDEP_BLEND_ENABLE:
 104       return 1;
 105    case PIPE_CAP_INDEP_BLEND_FUNC:
 106       return 1;
 107    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 108    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 109    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 110    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 111       return 1;
 112    case PIPE_CAP_DEPTH_CLIP_DISABLE:
 113       return 1;
 114    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 115       return PIPE_MAX_SO_BUFFERS;
 116    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 117    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 118       return 16*4;
 119    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 120    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 121       return 1024;
 122    case PIPE_CAP_MAX_VERTEX_STREAMS:
 123       return 1;
 124    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 125       return 2048;
 126    case PIPE_CAP_PRIMITIVE_RESTART:
 127       return 1;
 128    case PIPE_CAP_SHADER_STENCIL_EXPORT:
 129       return 1;
 130    case PIPE_CAP_TGSI_INSTANCEID:
 131    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 132    case PIPE_CAP_START_INSTANCE:
 133       return 1;
 134    case PIPE_CAP_SEAMLESS_CUBE_MAP:
 135    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 136       return 1;
 137    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 138       return 256; /* for GL3 */
 139    case PIPE_CAP_MIN_TEXEL_OFFSET:
 140       return -8;
 141    case PIPE_CAP_MAX_TEXEL_OFFSET:
 142       return 7;
 143    case PIPE_CAP_CONDITIONAL_RENDER:
 144       return 1;
 145    case PIPE_CAP_TEXTURE_BARRIER:
 146       return 0;
 147    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 148    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
 149    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
 150       return 1;
 151    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 152       return 0;
 153    case PIPE_CAP_GLSL_FEATURE_LEVEL:
 154       return 330;
 155    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
 156       return 140;
 157    case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 158    case PIPE_CAP_TGSI_TEX_TXF_LZ:
 159       return 0;
 160    case PIPE_CAP_COMPUTE:
 161       return 1;
 162    case PIPE_CAP_USER_VERTEX_BUFFERS:
 163    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 164    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
 165    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 166    case PIPE_CAP_DOUBLES:
 167    case PIPE_CAP_INT64:
 168    case PIPE_CAP_INT64_DIVMOD:
 169       return 1;
 170    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 171       return 16;
 172    case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 173    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 174    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 175    case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 176    case PIPE_CAP_TEXTURE_MULTISAMPLE:
 177       return 0;
 178    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 179       return 64;
 180    case PIPE_CAP_QUERY_TIMESTAMP:
 181    case PIPE_CAP_CUBE_MAP_ARRAY:
 182       return 1;
 183    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 184       return 1;
 185    case PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY:
 186       return 0;
 187    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 188       return 65536;
 189    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 190       return 0;
 191    case PIPE_CAP_TGSI_TEXCOORD:
 192    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 193       return 0;
 194    case PIPE_CAP_MAX_VIEWPORTS:
 195       return PIPE_MAX_VIEWPORTS;
 196    case PIPE_CAP_ENDIANNESS:
 197       return PIPE_ENDIAN_NATIVE;
 198    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 199       return 4;
 200    case PIPE_CAP_TEXTURE_GATHER_SM5:
 201    case PIPE_CAP_TEXTURE_QUERY_LOD:
 202       return 1;
 203    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 204    case PIPE_CAP_SAMPLE_SHADING:
 205    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 206       return 0;
 207    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 208       return 1;
 209    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 210       return 0;
 211    case PIPE_CAP_SAMPLER_VIEW_TARGET:
 212       return 1;
 213    case PIPE_CAP_FAKE_SW_MSAA:
 214       return 1;
 215    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 216       return -32;
 217    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 218       return 31;
 219    case PIPE_CAP_DRAW_INDIRECT:
 220       return 1;
 221    case PIPE_CAP_QUERY_SO_OVERFLOW:
 222       return 1;
 223
 224    case PIPE_CAP_VENDOR_ID:
 225       return 0xFFFFFFFF;
 226    case PIPE_CAP_DEVICE_ID:
 227       return 0xFFFFFFFF;
 228    case PIPE_CAP_ACCELERATED:
 229       return 0;
 230    case PIPE_CAP_VIDEO_MEMORY: {
 231       /* XXX: Do we want to return the full amount fo system memory ? */
 232       uint64_t system_memory;
 233
 234       if (!os_get_total_physical_memory(&system_memory))
 235          return 0;
 236
 237       if (sizeof(void *) == 4)
 238          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
 239           * eat application memory, which is quite limited on 32 bits. App
 240           * shouldn't expect too much available memory. */
 241          system_memory = MIN2(system_memory, 2048 << 20);
 242
 243       return (int)(system_memory >> 20);
 244    }
 245    case PIPE_CAP_UMA:
 246       return 0;
 247    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 248       return 1;
 249    case PIPE_CAP_CLIP_HALFZ:
 250    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 251    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 252       return 1;
 253    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
 254    case PIPE_CAP_CULL_DISTANCE:
 255       return 1;
 256    case PIPE_CAP_VERTEXID_NOBASE:
 257       return 0;
 258    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 259       return 0;
 260    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
 261    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
 262       return 1;
 263    case PIPE_CAP_CLEAR_TEXTURE:
 264       return 1;
 265    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 266    case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 267    case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 268    case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 269    case PIPE_CAP_DEPTH_BOUNDS_TEST:
 270    case PIPE_CAP_TGSI_TXQS:
 271    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
 272    case PIPE_CAP_SHAREABLE_SHADERS:
 273    case PIPE_CAP_DRAW_PARAMETERS:
 274    case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
 275    case PIPE_CAP_MULTI_DRAW_INDIRECT:
 276    case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
 277    case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
 278    case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
 279    case PIPE_CAP_INVALIDATE_BUFFER:
 280    case PIPE_CAP_GENERATE_MIPMAP:
 281    case PIPE_CAP_STRING_MARKER:
 282    case PIPE_CAP_SURFACE_REINTERPRET_BLOCKS:
 283    case PIPE_CAP_QUERY_BUFFER_OBJECT:
 284    case PIPE_CAP_QUERY_MEMORY_INFO:
 285    case PIPE_CAP_PCI_GROUP:
 286    case PIPE_CAP_PCI_BUS:
 287    case PIPE_CAP_PCI_DEVICE:
 288    case PIPE_CAP_PCI_FUNCTION:
 289    case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
 290    case PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES:
 291    case PIPE_CAP_TGSI_VOTE:
 292    case PIPE_CAP_MAX_WINDOW_RECTANGLES:
 293    case PIPE_CAP_POLYGON_OFFSET_UNITS_UNSCALED:
 294    case PIPE_CAP_VIEWPORT_SUBPIXEL_BITS:
 295    case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
 296    case PIPE_CAP_NATIVE_FENCE_FD:
 297    case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
 298    case PIPE_CAP_TGSI_FS_FBFETCH:
 299    case PIPE_CAP_TGSI_MUL_ZERO_WINS:
 300    case PIPE_CAP_TGSI_CLOCK:
 301    case PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE:
 302    case PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE:
 303    case PIPE_CAP_TGSI_BALLOT:
 304    case PIPE_CAP_TGSI_TES_LAYER_VIEWPORT:
 305    case PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX:
 306    case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
 307    case PIPE_CAP_POST_DEPTH_COVERAGE:
 308    case PIPE_CAP_BINDLESS_TEXTURE:
 309    case PIPE_CAP_NIR_SAMPLERS_AS_DEREF:
 310    case PIPE_CAP_MEMOBJ:
 311    case PIPE_CAP_LOAD_CONSTBUF:
 312    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
 313    case PIPE_CAP_TILE_RASTER_ORDER:
 314    case PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
 315    case PIPE_CAP_FRAMEBUFFER_MSAA_CONSTRAINTS:
 316    case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
 317    case PIPE_CAP_CONTEXT_PRIORITY_MASK:
 318    case PIPE_CAP_FENCE_SIGNAL:
 319    case PIPE_CAP_CONSTBUF0_FLAGS:
 320    case PIPE_CAP_PACKED_UNIFORMS:
 321    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES:
 322    case PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES:
 323    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES:
 324    case PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES:
 325    case PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE:
 326    case PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS:
 327    case PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS:
 328       return 0;
 329    case PIPE_CAP_MAX_GS_INVOCATIONS:
 330       return 32;
 331    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
 332       return 1 << 27;
 333    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
 334       return 4;
 335    }
 336    /* should only get here on unhandled cases */
 337    debug_printf("Unexpected PIPE_CAP %d query\n", param);
 338    return 0;
 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 }