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