src/mesa/state_tracker/st_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 #include "util/imports.h"
  29 #include "main/accum.h"
  30 #include "main/api_exec.h"
  31 #include "main/context.h"
  32 #include "main/glthread.h"
  33 #include "main/samplerobj.h"
  34 #include "main/shaderobj.h"
  35 #include "main/version.h"
  36 #include "main/vtxfmt.h"
  37 #include "main/hash.h"
  38 #include "program/prog_cache.h"
  39 #include "vbo/vbo.h"
  40 #include "glapi/glapi.h"
  41 #include "st_manager.h"
  42 #include "st_context.h"
  43 #include "st_debug.h"
  44 #include "st_cb_bitmap.h"
  45 #include "st_cb_blit.h"
  46 #include "st_cb_bufferobjects.h"
  47 #include "st_cb_clear.h"
  48 #include "st_cb_compute.h"
  49 #include "st_cb_condrender.h"
  50 #include "st_cb_copyimage.h"
  51 #include "st_cb_drawpixels.h"
  52 #include "st_cb_rasterpos.h"
  53 #include "st_cb_drawtex.h"
  54 #include "st_cb_eglimage.h"
  55 #include "st_cb_fbo.h"
  56 #include "st_cb_feedback.h"
  57 #include "st_cb_memoryobjects.h"
  58 #include "st_cb_msaa.h"
  59 #include "st_cb_perfmon.h"
  60 #include "st_cb_perfquery.h"
  61 #include "st_cb_program.h"
  62 #include "st_cb_queryobj.h"
  63 #include "st_cb_readpixels.h"
  64 #include "st_cb_semaphoreobjects.h"
  65 #include "st_cb_texture.h"
  66 #include "st_cb_xformfb.h"
  67 #include "st_cb_flush.h"
  68 #include "st_cb_syncobj.h"
  69 #include "st_cb_strings.h"
  70 #include "st_cb_texturebarrier.h"
  71 #include "st_cb_viewport.h"
  72 #include "st_atom.h"
  73 #include "st_draw.h"
  74 #include "st_extensions.h"
  75 #include "st_gen_mipmap.h"
  76 #include "st_pbo.h"
  77 #include "st_program.h"
  78 #include "st_sampler_view.h"
  79 #include "st_shader_cache.h"
  80 #include "st_vdpau.h"
  81 #include "st_texture.h"
  82 #include "st_util.h"
  83 #include "pipe/p_context.h"
  84 #include "util/u_cpu_detect.h"
  85 #include "util/u_inlines.h"
  86 #include "util/u_upload_mgr.h"
  87 #include "util/u_vbuf.h"
  88 #include "util/u_memory.h"
  89 #include "cso_cache/cso_context.h"
  90 #include "compiler/glsl/glsl_parser_extras.h"
  91
  92
  93 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  94
  95
  96 /**
  97  * Called via ctx->Driver.Enable()
  98  */
  99 static void
 100 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
 101 {
 102    struct st_context *st = st_context(ctx);
 103
 104    switch (cap) {
 105    case GL_DEBUG_OUTPUT:
 106    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 107       st_update_debug_callback(st);
 108       break;
 109    case GL_BLACKHOLE_RENDER_INTEL:
 110       st->pipe->set_frontend_noop(st->pipe, ctx->IntelBlackholeRender);
 111       break;
 112    default:
 113       break;
 114    }
 115 }
 116
 117
 118 /**
 119  * Called via ctx->Driver.QueryMemoryInfo()
 120  */
 121 static void
 122 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 123 {
 124    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 125    struct pipe_memory_info info;
 126
 127    assert(screen->query_memory_info);
 128    if (!screen->query_memory_info)
 129       return;
 130
 131    screen->query_memory_info(screen, &info);
 132
 133    out->total_device_memory = info.total_device_memory;
 134    out->avail_device_memory = info.avail_device_memory;
 135    out->total_staging_memory = info.total_staging_memory;
 136    out->avail_staging_memory = info.avail_staging_memory;
 137    out->device_memory_evicted = info.device_memory_evicted;
 138    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 139 }
 140
 141
 142 static uint64_t
 143 st_get_active_states(struct gl_context *ctx)
 144 {
 145    struct st_program *vp =
 146       st_program(ctx->VertexProgram._Current);
 147    struct st_program *tcp =
 148       st_program(ctx->TessCtrlProgram._Current);
 149    struct st_program *tep =
 150       st_program(ctx->TessEvalProgram._Current);
 151    struct st_program *gp =
 152       st_program(ctx->GeometryProgram._Current);
 153    struct st_program *fp =
 154       st_program(ctx->FragmentProgram._Current);
 155    struct st_program *cp =
 156       st_program(ctx->ComputeProgram._Current);
 157    uint64_t active_shader_states = 0;
 158
 159    if (vp)
 160       active_shader_states |= vp->affected_states;
 161    if (tcp)
 162       active_shader_states |= tcp->affected_states;
 163    if (tep)
 164       active_shader_states |= tep->affected_states;
 165    if (gp)
 166       active_shader_states |= gp->affected_states;
 167    if (fp)
 168       active_shader_states |= fp->affected_states;
 169    if (cp)
 170       active_shader_states |= cp->affected_states;
 171
 172    /* Mark non-shader-resource shader states as "always active". */
 173    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 174 }
 175
 176
 177 void
 178 st_invalidate_buffers(struct st_context *st)
 179 {
 180    st->dirty |= ST_NEW_BLEND |
 181                 ST_NEW_DSA |
 182                 ST_NEW_FB_STATE |
 183                 ST_NEW_SAMPLE_STATE |
 184                 ST_NEW_SAMPLE_SHADING |
 185                 ST_NEW_FS_STATE |
 186                 ST_NEW_POLY_STIPPLE |
 187                 ST_NEW_VIEWPORT |
 188                 ST_NEW_RASTERIZER |
 189                 ST_NEW_SCISSOR |
 190                 ST_NEW_WINDOW_RECTANGLES;
 191 }
 192
 193
 194 static inline bool
 195 st_vp_uses_current_values(const struct gl_context *ctx)
 196 {
 197    const uint64_t inputs = ctx->VertexProgram._Current->info.inputs_read;
 198    return _mesa_draw_current_bits(ctx) & inputs;
 199 }
 200
 201
 202 /**
 203  * Called via ctx->Driver.UpdateState()
 204  */
 205 static void
 206 st_invalidate_state(struct gl_context *ctx)
 207 {
 208    GLbitfield new_state = ctx->NewState;
 209    struct st_context *st = st_context(ctx);
 210
 211    if (new_state & _NEW_BUFFERS) {
 212       st_invalidate_buffers(st);
 213    } else {
 214       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 215        * check them when _NEW_BUFFERS isn't set.
 216        */
 217       if (new_state & _NEW_PROGRAM)
 218          st->dirty |= ST_NEW_RASTERIZER;
 219
 220       if (new_state & _NEW_FOG)
 221          st->dirty |= ST_NEW_FS_STATE;
 222
 223       if (new_state & _NEW_FRAG_CLAMP) {
 224          if (st->clamp_frag_color_in_shader)
 225             st->dirty |= ST_NEW_FS_STATE;
 226          else
 227             st->dirty |= ST_NEW_RASTERIZER;
 228       }
 229    }
 230
 231    if (new_state & (_NEW_LIGHT |
 232                     _NEW_POINT))
 233       st->dirty |= ST_NEW_RASTERIZER;
 234
 235    if ((new_state & _NEW_LIGHT) &&
 236        (st->lower_flatshade || st->lower_two_sided_color))
 237       st->dirty |= ST_NEW_FS_STATE;
 238
 239    if (new_state & _NEW_PROJECTION &&
 240        st_user_clip_planes_enabled(ctx))
 241       st->dirty |= ST_NEW_CLIP_STATE;
 242
 243    if (new_state & _NEW_PIXEL)
 244       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 245
 246    if (new_state & _NEW_CURRENT_ATTRIB && st_vp_uses_current_values(ctx))
 247       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 248
 249    if (st->clamp_frag_depth_in_shader && (new_state & _NEW_VIEWPORT)) {
 250       if (ctx->GeometryProgram._Current)
 251          st->dirty |= ST_NEW_GS_CONSTANTS;
 252       else if (ctx->TessEvalProgram._Current)
 253          st->dirty |= ST_NEW_TES_CONSTANTS;
 254       else
 255          st->dirty |= ST_NEW_VS_CONSTANTS;
 256       st->dirty |= ST_NEW_FS_CONSTANTS;
 257    }
 258
 259    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 260    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT)) {
 261       st->dirty |= ST_NEW_VS_STATE;
 262       if (st->ctx->API == API_OPENGL_COMPAT && ctx->Version >= 32) {
 263          st->dirty |= ST_NEW_GS_STATE | ST_NEW_TES_STATE;
 264       }
 265    }
 266
 267    /* Which shaders are dirty will be determined manually. */
 268    if (new_state & _NEW_PROGRAM) {
 269       st->gfx_shaders_may_be_dirty = true;
 270       st->compute_shader_may_be_dirty = true;
 271       /* This will mask out unused shader resources. */
 272       st->active_states = st_get_active_states(ctx);
 273    }
 274
 275    if (new_state & _NEW_TEXTURE_OBJECT) {
 276       st->dirty |= st->active_states &
 277                    (ST_NEW_SAMPLER_VIEWS |
 278                     ST_NEW_SAMPLERS |
 279                     ST_NEW_IMAGE_UNITS);
 280       if (ctx->FragmentProgram._Current &&
 281           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 282          st->dirty |= ST_NEW_FS_STATE;
 283       }
 284    }
 285 }
 286
 287
 288 /*
 289  * In some circumstances (such as running google-chrome) the state
 290  * tracker may try to delete a resource view from a context different
 291  * than when it was created.  We don't want to do that.
 292  *
 293  * In that situation, st_texture_release_all_sampler_views() calls this
 294  * function to transfer the sampler view reference to this context (expected
 295  * to be the context which created the view.)
 296  */
 297 void
 298 st_save_zombie_sampler_view(struct st_context *st,
 299                             struct pipe_sampler_view *view)
 300 {
 301    struct st_zombie_sampler_view_node *entry;
 302
 303    assert(view->context == st->pipe);
 304
 305    entry = MALLOC_STRUCT(st_zombie_sampler_view_node);
 306    if (!entry)
 307       return;
 308
 309    entry->view = view;
 310
 311    /* We need a mutex since this function may be called from one thread
 312     * while free_zombie_resource_views() is called from another.
 313     */
 314    simple_mtx_lock(&st->zombie_sampler_views.mutex);
 315    list_addtail(&entry->node, &st->zombie_sampler_views.list.node);
 316    simple_mtx_unlock(&st->zombie_sampler_views.mutex);
 317 }
 318
 319
 320 /*
 321  * Since OpenGL shaders may be shared among contexts, we can wind up
 322  * with variants of a shader created with different contexts.
 323  * When we go to destroy a gallium shader, we want to free it with the
 324  * same context that it was created with, unless the driver reports
 325  * PIPE_CAP_SHAREABLE_SHADERS = TRUE.
 326  */
 327 void
 328 st_save_zombie_shader(struct st_context *st,
 329                       enum pipe_shader_type type,
 330                       struct pipe_shader_state *shader)
 331 {
 332    struct st_zombie_shader_node *entry;
 333
 334    /* we shouldn't be here if the driver supports shareable shaders */
 335    assert(!st->has_shareable_shaders);
 336
 337    entry = MALLOC_STRUCT(st_zombie_shader_node);
 338    if (!entry)
 339       return;
 340
 341    entry->shader = shader;
 342    entry->type = type;
 343
 344    /* We need a mutex since this function may be called from one thread
 345     * while free_zombie_shaders() is called from another.
 346     */
 347    simple_mtx_lock(&st->zombie_shaders.mutex);
 348    list_addtail(&entry->node, &st->zombie_shaders.list.node);
 349    simple_mtx_unlock(&st->zombie_shaders.mutex);
 350 }
 351
 352
 353 /*
 354  * Free any zombie sampler views that may be attached to this context.
 355  */
 356 static void
 357 free_zombie_sampler_views(struct st_context *st)
 358 {
 359    struct st_zombie_sampler_view_node *entry, *next;
 360
 361    if (list_is_empty(&st->zombie_sampler_views.list.node)) {
 362       return;
 363    }
 364
 365    simple_mtx_lock(&st->zombie_sampler_views.mutex);
 366
 367    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 368                             &st->zombie_sampler_views.list.node, node) {
 369       list_del(&entry->node);  // remove this entry from the list
 370
 371       assert(entry->view->context == st->pipe);
 372       pipe_sampler_view_reference(&entry->view, NULL);
 373
 374       free(entry);
 375    }
 376
 377    assert(list_is_empty(&st->zombie_sampler_views.list.node));
 378
 379    simple_mtx_unlock(&st->zombie_sampler_views.mutex);
 380 }
 381
 382
 383 /*
 384  * Free any zombie shaders that may be attached to this context.
 385  */
 386 static void
 387 free_zombie_shaders(struct st_context *st)
 388 {
 389    struct st_zombie_shader_node *entry, *next;
 390
 391    if (list_is_empty(&st->zombie_shaders.list.node)) {
 392       return;
 393    }
 394
 395    simple_mtx_lock(&st->zombie_shaders.mutex);
 396
 397    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 398                             &st->zombie_shaders.list.node, node) {
 399       list_del(&entry->node);  // remove this entry from the list
 400
 401       switch (entry->type) {
 402       case PIPE_SHADER_VERTEX:
 403          st->pipe->bind_vs_state(st->pipe, NULL);
 404          st->pipe->delete_vs_state(st->pipe, entry->shader);
 405          break;
 406       case PIPE_SHADER_FRAGMENT:
 407          st->pipe->bind_fs_state(st->pipe, NULL);
 408          st->pipe->delete_fs_state(st->pipe, entry->shader);
 409          break;
 410       case PIPE_SHADER_GEOMETRY:
 411          st->pipe->bind_gs_state(st->pipe, NULL);
 412          st->pipe->delete_gs_state(st->pipe, entry->shader);
 413          break;
 414       case PIPE_SHADER_TESS_CTRL:
 415          st->pipe->bind_tcs_state(st->pipe, NULL);
 416          st->pipe->delete_tcs_state(st->pipe, entry->shader);
 417          break;
 418       case PIPE_SHADER_TESS_EVAL:
 419          st->pipe->bind_tes_state(st->pipe, NULL);
 420          st->pipe->delete_tes_state(st->pipe, entry->shader);
 421          break;
 422       case PIPE_SHADER_COMPUTE:
 423          st->pipe->bind_compute_state(st->pipe, NULL);
 424          st->pipe->delete_compute_state(st->pipe, entry->shader);
 425          break;
 426       default:
 427          unreachable("invalid shader type in free_zombie_shaders()");
 428       }
 429       free(entry);
 430    }
 431
 432    assert(list_is_empty(&st->zombie_shaders.list.node));
 433
 434    simple_mtx_unlock(&st->zombie_shaders.mutex);
 435 }
 436
 437
 438 /*
 439  * This function is called periodically to free any zombie objects
 440  * which are attached to this context.
 441  */
 442 void
 443 st_context_free_zombie_objects(struct st_context *st)
 444 {
 445    free_zombie_sampler_views(st);
 446    free_zombie_shaders(st);
 447 }
 448
 449
 450 static void
 451 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 452 {
 453    uint i;
 454
 455    st_destroy_atoms(st);
 456    st_destroy_draw(st);
 457    st_destroy_clear(st);
 458    st_destroy_bitmap(st);
 459    st_destroy_drawpix(st);
 460    st_destroy_drawtex(st);
 461    st_destroy_perfmon(st);
 462    st_destroy_pbo_helpers(st);
 463    st_destroy_bound_texture_handles(st);
 464    st_destroy_bound_image_handles(st);
 465
 466    for (i = 0; i < ARRAY_SIZE(st->state.frag_sampler_views); i++) {
 467       pipe_sampler_view_reference(&st->state.vert_sampler_views[i], NULL);
 468       pipe_sampler_view_reference(&st->state.frag_sampler_views[i], NULL);
 469    }
 470
 471    /* free glReadPixels cache data */
 472    st_invalidate_readpix_cache(st);
 473    util_throttle_deinit(st->pipe->screen, &st->throttle);
 474
 475    cso_destroy_context(st->cso_context);
 476
 477    if (st->pipe && destroy_pipe)
 478       st->pipe->destroy(st->pipe);
 479
 480    free(st);
 481 }
 482
 483
 484 static void
 485 st_init_driver_flags(struct st_context *st)
 486 {
 487    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 488
 489    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 490    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 491    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 492    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 493    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 494
 495    /* Shader resources */
 496    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 497    if (st->has_hw_atomics)
 498       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS | ST_NEW_CS_ATOMICS;
 499    else
 500       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 501    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 502    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 503
 504    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 505    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 506    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 507    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 508    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 509    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 510
 511    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 512    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 513    f->NewScissorRect = ST_NEW_SCISSOR;
 514    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 515
 516    if (st->lower_alpha_test)
 517       f->NewAlphaTest = ST_NEW_FS_STATE;
 518    else
 519       f->NewAlphaTest = ST_NEW_DSA;
 520
 521    f->NewBlend = ST_NEW_BLEND;
 522    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 523    f->NewColorMask = ST_NEW_BLEND;
 524    f->NewDepth = ST_NEW_DSA;
 525    f->NewLogicOp = ST_NEW_BLEND;
 526    f->NewStencil = ST_NEW_DSA;
 527    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 528                              ST_NEW_SAMPLE_STATE | ST_NEW_SAMPLE_SHADING;
 529    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 530    f->NewSampleMask = ST_NEW_SAMPLE_STATE;
 531    f->NewSampleLocations = ST_NEW_SAMPLE_STATE;
 532    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 533
 534    /* This depends on what the gallium driver wants. */
 535    if (st->force_persample_in_shader) {
 536       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 537       f->NewSampleShading |= ST_NEW_FS_STATE;
 538    } else {
 539       f->NewSampleShading |= ST_NEW_RASTERIZER;
 540    }
 541
 542    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 543    f->NewClipPlane = ST_NEW_CLIP_STATE;
 544
 545    if (st->clamp_frag_depth_in_shader) {
 546       f->NewClipControl |= ST_NEW_VS_STATE | ST_NEW_GS_STATE |
 547                            ST_NEW_TES_STATE;
 548
 549       f->NewDepthClamp = ST_NEW_FS_STATE | ST_NEW_VS_STATE |
 550                          ST_NEW_GS_STATE | ST_NEW_TES_STATE;
 551    } else {
 552       f->NewDepthClamp = ST_NEW_RASTERIZER;
 553    }
 554
 555    if (st->lower_ucp)
 556       f->NewClipPlaneEnable = ST_NEW_VS_STATE;
 557    else
 558       f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 559
 560    f->NewLineState = ST_NEW_RASTERIZER;
 561    f->NewPolygonState = ST_NEW_RASTERIZER;
 562    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 563    f->NewViewport = ST_NEW_VIEWPORT;
 564    f->NewNvConservativeRasterization = ST_NEW_RASTERIZER;
 565    f->NewNvConservativeRasterizationParams = ST_NEW_RASTERIZER;
 566    f->NewIntelConservativeRasterization = ST_NEW_RASTERIZER;
 567 }
 568
 569
 570 static struct st_context *
 571 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 572                        const struct st_config_options *options, bool no_error)
 573 {
 574    struct pipe_screen *screen = pipe->screen;
 575    uint i;
 576    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 577
 578    st->options = *options;
 579
 580    ctx->st = st;
 581
 582    st->ctx = ctx;
 583    st->pipe = pipe;
 584    st->dirty = ST_ALL_STATES_MASK;
 585
 586    st->can_bind_const_buffer_as_vertex =
 587       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 588
 589    /* st/mesa always uploads zero-stride vertex attribs, and other user
 590     * vertex buffers are only possible with a compatibility profile.
 591     * So tell the u_vbuf module that user VBOs are not possible with the Core
 592     * profile, so that u_vbuf is bypassed completely if there is nothing else
 593     * to do.
 594     */
 595    unsigned cso_flags =
 596       ctx->API == API_OPENGL_CORE ? CSO_NO_USER_VERTEX_BUFFERS : 0;
 597    st->cso_context = cso_create_context(pipe, cso_flags);
 598
 599    st_init_atoms(st);
 600    st_init_clear(st);
 601    st_init_pbo_helpers(st);
 602
 603    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 604    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 605       st->internal_target = PIPE_TEXTURE_2D;
 606    else
 607       st->internal_target = PIPE_TEXTURE_RECT;
 608
 609    /* Setup vertex element info for 'struct st_util_vertex'.
 610     */
 611    {
 612       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 613
 614       memset(&st->util_velems, 0, sizeof(st->util_velems));
 615       st->util_velems.velems[0].src_offset = 0;
 616       st->util_velems.velems[0].vertex_buffer_index = 0;
 617       st->util_velems.velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 618       st->util_velems.velems[1].src_offset = 3 * sizeof(float);
 619       st->util_velems.velems[1].vertex_buffer_index = 0;
 620       st->util_velems.velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 621       st->util_velems.velems[2].src_offset = 7 * sizeof(float);
 622       st->util_velems.velems[2].vertex_buffer_index = 0;
 623       st->util_velems.velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 624    }
 625
 626    /* Need these flags:
 627     */
 628    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 629    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 630
 631    if (no_error)
 632       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 633
 634    ctx->Const.PackedDriverUniformStorage =
 635       screen->get_param(screen, PIPE_CAP_PACKED_UNIFORMS);
 636
 637    ctx->Const.BitmapUsesRed =
 638       screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
 639                                   PIPE_TEXTURE_2D, 0, 0,
 640                                   PIPE_BIND_SAMPLER_VIEW);
 641
 642    st->has_stencil_export =
 643       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 644    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 645                                               PIPE_TEXTURE_2D, 0, 0,
 646                                               PIPE_BIND_SAMPLER_VIEW);
 647    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 648                                               PIPE_TEXTURE_2D, 0, 0,
 649                                               PIPE_BIND_SAMPLER_VIEW);
 650    st->has_astc_2d_ldr =
 651       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
 652                                   PIPE_TEXTURE_2D, 0, 0, PIPE_BIND_SAMPLER_VIEW);
 653    st->has_astc_5x5_ldr =
 654       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_5x5_SRGB,
 655                                   PIPE_TEXTURE_2D, 0, 0, PIPE_BIND_SAMPLER_VIEW);
 656    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 657                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 658    st->force_persample_in_shader =
 659       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 660       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 661    st->has_shareable_shaders = screen->get_param(screen,
 662                                                  PIPE_CAP_SHAREABLE_SHADERS);
 663    st->needs_texcoord_semantic =
 664       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 665    st->apply_texture_swizzle_to_border_color =
 666       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 667          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 668           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 669    st->has_time_elapsed =
 670       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 671    st->has_half_float_packing =
 672       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 673    st->has_multi_draw_indirect =
 674       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 675    st->has_single_pipe_stat =
 676       screen->get_param(screen, PIPE_CAP_QUERY_PIPELINE_STATISTICS_SINGLE);
 677    st->has_indep_blend_func =
 678       screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC);
 679    st->needs_rgb_dst_alpha_override =
 680       screen->get_param(screen, PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND);
 681    st->lower_flatshade =
 682       !screen->get_param(screen, PIPE_CAP_FLATSHADE);
 683    st->lower_alpha_test =
 684       !screen->get_param(screen, PIPE_CAP_ALPHA_TEST);
 685    st->lower_point_size =
 686       !screen->get_param(screen, PIPE_CAP_POINT_SIZE_FIXED);
 687    st->lower_two_sided_color =
 688       !screen->get_param(screen, PIPE_CAP_TWO_SIDED_COLOR);
 689    st->lower_ucp =
 690       !screen->get_param(screen, PIPE_CAP_CLIP_PLANES);
 691    st->allow_st_finalize_nir_twice = screen->finalize_nir != NULL;
 692
 693    st->has_hw_atomics =
 694       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 695                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 696       ? true : false;
 697
 698    util_throttle_init(&st->throttle,
 699                       screen->get_param(screen,
 700                                         PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET));
 701
 702    /* GL limits and extensions */
 703    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 704    st_init_extensions(pipe->screen, &ctx->Const,
 705                       &ctx->Extensions, &st->options, ctx->API);
 706
 707    /* FIXME: add support for geometry and tessellation shaders for
 708     * lower_point_size
 709     */
 710    assert(!ctx->Extensions.OES_geometry_shader || !st->lower_point_size);
 711    assert(!ctx->Extensions.ARB_tessellation_shader || !st->lower_point_size);
 712
 713    /* FIXME: add support for geometry and tessellation shaders for
 714     * lower_ucp
 715     */
 716    assert(!ctx->Extensions.OES_geometry_shader || !st->lower_ucp);
 717    assert(!ctx->Extensions.ARB_tessellation_shader || !st->lower_ucp);
 718
 719    if (st_have_perfmon(st)) {
 720       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 721    }
 722
 723    if (st_have_perfquery(st)) {
 724       ctx->Extensions.INTEL_performance_query = GL_TRUE;
 725    }
 726
 727    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 728    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 729       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 730          st->clamp_vert_color_in_shader = GL_TRUE;
 731       }
 732
 733       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 734          st->clamp_frag_color_in_shader = GL_TRUE;
 735       }
 736
 737       /* For drivers which cannot do color clamping, it's better to just
 738        * disable ARB_color_buffer_float in the core profile, because
 739        * the clamping is deprecated there anyway. */
 740       if (ctx->API == API_OPENGL_CORE &&
 741           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 742          st->clamp_vert_color_in_shader = GL_FALSE;
 743          st->clamp_frag_color_in_shader = GL_FALSE;
 744          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 745       }
 746    }
 747
 748    if (screen->get_param(screen, PIPE_CAP_DEPTH_CLIP_DISABLE) == 2)
 749       st->clamp_frag_depth_in_shader = true;
 750
 751    /* called after _mesa_create_context/_mesa_init_point, fix default user
 752     * settable max point size up
 753     */
 754    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 755                              ctx->Const.MaxPointSizeAA);
 756    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 757     * is not supported
 758     */
 759    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 760       !screen->get_param(screen, PIPE_CAP_VERTEX_SHADER_SATURATE);
 761
 762    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].PositionAlwaysInvariant = options->vs_position_always_invariant;
 763
 764    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 765       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 766                                PIPE_SHADER_CAP_PREFERRED_IR);
 767    ctx->Const.UseNIRGLSLLinker = preferred_ir == PIPE_SHADER_IR_NIR;
 768
 769    if (ctx->Const.GLSLVersion < 400) {
 770       for (i = 0; i < MESA_SHADER_STAGES; i++)
 771          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 772    }
 773
 774    /* Set which shader types can be compiled at link time. */
 775    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 776          st->has_shareable_shaders &&
 777          !st->clamp_frag_depth_in_shader &&
 778          !st->clamp_vert_color_in_shader &&
 779          !st->lower_point_size &&
 780          !st->lower_ucp;
 781
 782    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 783          st->has_shareable_shaders &&
 784          !st->lower_flatshade &&
 785          !st->lower_alpha_test &&
 786          !st->clamp_frag_color_in_shader &&
 787          !st->clamp_frag_depth_in_shader &&
 788          !st->force_persample_in_shader &&
 789          !st->lower_two_sided_color;
 790
 791    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 792    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] =
 793          st->has_shareable_shaders &&
 794          !st->clamp_frag_depth_in_shader &&
 795          !st->clamp_vert_color_in_shader;
 796    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] =
 797          st->has_shareable_shaders &&
 798          !st->clamp_frag_depth_in_shader &&
 799          !st->clamp_vert_color_in_shader;
 800    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 801
 802    st->bitmap.cache.empty = true;
 803
 804    _mesa_override_extensions(ctx);
 805    _mesa_compute_version(ctx);
 806
 807    if (ctx->Version == 0) {
 808       /* This can happen when a core profile was requested, but the driver
 809        * does not support some features of GL 3.1 or later.
 810        */
 811       st_destroy_context_priv(st, false);
 812       return NULL;
 813    }
 814
 815    /* This must be done after extensions are initialized to enable persistent
 816     * mappings immediately.
 817     */
 818    _vbo_CreateContext(ctx, true);
 819
 820    _mesa_initialize_dispatch_tables(ctx);
 821    _mesa_initialize_vbo_vtxfmt(ctx);
 822    st_init_driver_flags(st);
 823
 824    /* Initialize context's winsys buffers list */
 825    list_inithead(&st->winsys_buffers);
 826
 827    list_inithead(&st->zombie_sampler_views.list.node);
 828    simple_mtx_init(&st->zombie_sampler_views.mutex, mtx_plain);
 829    list_inithead(&st->zombie_shaders.list.node);
 830    simple_mtx_init(&st->zombie_shaders.mutex, mtx_plain);
 831
 832    return st;
 833 }
 834
 835
 836 static void
 837 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 838 {
 839    struct st_context *st = ctx->st;
 840    st->pipe->emit_string_marker(st->pipe, string, len);
 841 }
 842
 843
 844 static void
 845 st_set_background_context(struct gl_context *ctx,
 846                           struct util_queue_monitoring *queue_info)
 847 {
 848    struct st_context *st = ctx->st;
 849    struct st_manager *smapi =
 850       (struct st_manager *) st->iface.st_context_private;
 851
 852    assert(smapi->set_background_context);
 853    smapi->set_background_context(&st->iface, queue_info);
 854 }
 855
 856
 857 static void
 858 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 859 {
 860    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 861
 862    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 863    memset(uuid, 0, GL_UUID_SIZE_EXT);
 864    screen->get_device_uuid(screen, uuid);
 865 }
 866
 867
 868 static void
 869 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 870 {
 871    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 872
 873    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 874    memset(uuid, 0, GL_UUID_SIZE_EXT);
 875    screen->get_driver_uuid(screen, uuid);
 876 }
 877
 878
 879 static void
 880 st_init_driver_functions(struct pipe_screen *screen,
 881                          struct dd_function_table *functions)
 882 {
 883    _mesa_init_sampler_object_functions(functions);
 884
 885    st_init_draw_functions(functions);
 886    st_init_blit_functions(functions);
 887    st_init_bufferobject_functions(screen, functions);
 888    st_init_clear_functions(functions);
 889    st_init_bitmap_functions(functions);
 890    st_init_copy_image_functions(functions);
 891    st_init_drawpixels_functions(functions);
 892    st_init_rasterpos_functions(functions);
 893
 894    st_init_drawtex_functions(functions);
 895
 896    st_init_eglimage_functions(functions);
 897
 898    st_init_fbo_functions(functions);
 899    st_init_feedback_functions(functions);
 900    st_init_memoryobject_functions(functions);
 901    st_init_msaa_functions(functions);
 902    st_init_perfmon_functions(functions);
 903    st_init_perfquery_functions(functions);
 904    st_init_program_functions(functions);
 905    st_init_query_functions(functions);
 906    st_init_cond_render_functions(functions);
 907    st_init_readpixels_functions(functions);
 908    st_init_semaphoreobject_functions(functions);
 909    st_init_texture_functions(functions);
 910    st_init_texture_barrier_functions(functions);
 911    st_init_flush_functions(screen, functions);
 912    st_init_string_functions(functions);
 913    st_init_viewport_functions(functions);
 914    st_init_compute_functions(functions);
 915
 916    st_init_xformfb_functions(functions);
 917    st_init_syncobj_functions(functions);
 918
 919    st_init_vdpau_functions(functions);
 920
 921    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 922       functions->EmitStringMarker = st_emit_string_marker;
 923
 924    functions->Enable = st_Enable;
 925    functions->UpdateState = st_invalidate_state;
 926    functions->QueryMemoryInfo = st_query_memory_info;
 927    functions->SetBackgroundContext = st_set_background_context;
 928    functions->GetDriverUuid = st_get_driver_uuid;
 929    functions->GetDeviceUuid = st_get_device_uuid;
 930
 931    /* GL_ARB_get_program_binary */
 932    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 933
 934    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 935       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 936                                PIPE_SHADER_CAP_PREFERRED_IR);
 937    if (preferred_ir == PIPE_SHADER_IR_NIR) {
 938       functions->ShaderCacheSerializeDriverBlob =  st_serialise_nir_program;
 939       functions->ProgramBinarySerializeDriverBlob =
 940          st_serialise_nir_program_binary;
 941       functions->ProgramBinaryDeserializeDriverBlob =
 942          st_deserialise_nir_program;
 943    } else {
 944       functions->ShaderCacheSerializeDriverBlob =  st_serialise_tgsi_program;
 945       functions->ProgramBinarySerializeDriverBlob =
 946          st_serialise_tgsi_program_binary;
 947       functions->ProgramBinaryDeserializeDriverBlob =
 948          st_deserialise_tgsi_program;
 949    }
 950 }
 951
 952
 953 struct st_context *
 954 st_create_context(gl_api api, struct pipe_context *pipe,
 955                   const struct gl_config *visual,
 956                   struct st_context *share,
 957                   const struct st_config_options *options,
 958                   bool no_error)
 959 {
 960    struct gl_context *ctx;
 961    struct gl_context *shareCtx = share ? share->ctx : NULL;
 962    struct dd_function_table funcs;
 963    struct st_context *st;
 964
 965    util_cpu_detect();
 966
 967    memset(&funcs, 0, sizeof(funcs));
 968    st_init_driver_functions(pipe->screen, &funcs);
 969
 970    ctx = calloc(1, sizeof(struct gl_context));
 971    if (!ctx)
 972       return NULL;
 973
 974    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 975       free(ctx);
 976       return NULL;
 977    }
 978
 979    st_debug_init();
 980
 981    if (pipe->screen->get_disk_shader_cache)
 982       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 983
 984    /* XXX: need a capability bit in gallium to query if the pipe
 985     * driver prefers DP4 or MUL/MAD for vertex transformation.
 986     */
 987    if (debug_get_option_mesa_mvp_dp4())
 988       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 989
 990    st = st_create_context_priv(ctx, pipe, options, no_error);
 991    if (!st) {
 992       _mesa_destroy_context(ctx);
 993    }
 994
 995    return st;
 996 }
 997
 998
 999 /**
1000  * When we destroy a context, we must examine all texture objects to
1001  * find/release any sampler views created by that context.
1002  *
1003  * This callback is called per-texture object.  It releases all the
1004  * texture's sampler views which belong to the context.
1005  */
1006 static void
1007 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
1008 {
1009    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
1010    struct st_context *st = (struct st_context *) userData;
1011
1012    st_texture_release_context_sampler_view(st, st_texture_object(texObj));
1013 }
1014
1015 static void
1016 destroy_framebuffer_attachment_sampler_cb(GLuint id, void *data, void *userData)
1017 {
1018    struct gl_framebuffer* glfb = (struct gl_framebuffer*) data;
1019    struct st_context *st = (struct st_context *) userData;
1020
1021     for (unsigned i = 0; i < BUFFER_COUNT; i++) {
1022       struct gl_renderbuffer_attachment *att = &glfb->Attachment[i];
1023       if (att->Texture) {
1024         st_texture_release_context_sampler_view(st, st_texture_object(att->Texture));
1025       }
1026    }
1027 }
1028
1029 void
1030 st_destroy_context(struct st_context *st)
1031 {
1032    struct gl_context *ctx = st->ctx;
1033    struct st_framebuffer *stfb, *next;
1034    struct gl_framebuffer *save_drawbuffer;
1035    struct gl_framebuffer *save_readbuffer;
1036
1037    /* Save the current context and draw/read buffers*/
1038    GET_CURRENT_CONTEXT(save_ctx);
1039    if (save_ctx) {
1040       save_drawbuffer = save_ctx->WinSysDrawBuffer;
1041       save_readbuffer = save_ctx->WinSysReadBuffer;
1042    } else {
1043       save_drawbuffer = save_readbuffer = NULL;
1044    }
1045
1046    /*
1047     * We need to bind the context we're deleting so that
1048     * _mesa_reference_texobj_() uses this context when deleting textures.
1049     * Similarly for framebuffer objects, etc.
1050     */
1051    _mesa_make_current(ctx, NULL, NULL);
1052
1053    /* This must be called first so that glthread has a chance to finish */
1054    _mesa_glthread_destroy(ctx);
1055
1056    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
1057
1058    /* For the fallback textures, free any sampler views belonging to this
1059     * context.
1060     */
1061    for (unsigned i = 0; i < NUM_TEXTURE_TARGETS; i++) {
1062       struct st_texture_object *stObj =
1063          st_texture_object(ctx->Shared->FallbackTex[i]);
1064       if (stObj) {
1065          st_texture_release_context_sampler_view(st, stObj);
1066       }
1067    }
1068
1069    st_context_free_zombie_objects(st);
1070
1071    simple_mtx_destroy(&st->zombie_sampler_views.mutex);
1072    simple_mtx_destroy(&st->zombie_shaders.mutex);
1073
1074    st_release_program(st, &st->fp);
1075    st_release_program(st, &st->gp);
1076    st_release_program(st, &st->vp);
1077    st_release_program(st, &st->tcp);
1078    st_release_program(st, &st->tep);
1079    st_release_program(st, &st->cp);
1080
1081    /* release framebuffer in the winsys buffers list */
1082    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
1083       st_framebuffer_reference(&stfb, NULL);
1084    }
1085
1086    _mesa_HashWalk(ctx->Shared->FrameBuffers, destroy_framebuffer_attachment_sampler_cb, st);
1087
1088    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
1089    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
1090
1091    _vbo_DestroyContext(ctx);
1092
1093    st_destroy_program_variants(st);
1094
1095    _mesa_free_context_data(ctx);
1096
1097    /* This will free the st_context too, so 'st' must not be accessed
1098     * afterwards. */
1099    st_destroy_context_priv(st, true);
1100    st = NULL;
1101
1102    free(ctx);
1103
1104    if (save_ctx == ctx) {
1105       /* unbind the context we just deleted */
1106       _mesa_make_current(NULL, NULL, NULL);
1107    } else {
1108       /* Restore the current context and draw/read buffers (may be NULL) */
1109       _mesa_make_current(save_ctx, save_drawbuffer, save_readbuffer);
1110    }
1111 }