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