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