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
  89
  90 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  91
  92
  93 /**
  94  * Called via ctx->Driver.Enable()
  95  */
  96 static void
  97 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  98 {
  99    struct st_context *st = st_context(ctx);
 100
 101    switch (cap) {
 102    case GL_DEBUG_OUTPUT:
 103    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 104       st_update_debug_callback(st);
 105       break;
 106    default:
 107       break;
 108    }
 109 }
 110
 111
 112 /**
 113  * Called via ctx->Driver.QueryMemoryInfo()
 114  */
 115 static void
 116 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 117 {
 118    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 119    struct pipe_memory_info info;
 120
 121    assert(screen->query_memory_info);
 122    if (!screen->query_memory_info)
 123       return;
 124
 125    screen->query_memory_info(screen, &info);
 126
 127    out->total_device_memory = info.total_device_memory;
 128    out->avail_device_memory = info.avail_device_memory;
 129    out->total_staging_memory = info.total_staging_memory;
 130    out->avail_staging_memory = info.avail_staging_memory;
 131    out->device_memory_evicted = info.device_memory_evicted;
 132    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 133 }
 134
 135
 136 static uint64_t
 137 st_get_active_states(struct gl_context *ctx)
 138 {
 139    struct st_vertex_program *vp =
 140       st_vertex_program(ctx->VertexProgram._Current);
 141    struct st_common_program *tcp =
 142       st_common_program(ctx->TessCtrlProgram._Current);
 143    struct st_common_program *tep =
 144       st_common_program(ctx->TessEvalProgram._Current);
 145    struct st_common_program *gp =
 146       st_common_program(ctx->GeometryProgram._Current);
 147    struct st_fragment_program *fp =
 148       st_fragment_program(ctx->FragmentProgram._Current);
 149    struct st_compute_program *cp =
 150       st_compute_program(ctx->ComputeProgram._Current);
 151    uint64_t active_shader_states = 0;
 152
 153    if (vp)
 154       active_shader_states |= vp->affected_states;
 155    if (tcp)
 156       active_shader_states |= tcp->affected_states;
 157    if (tep)
 158       active_shader_states |= tep->affected_states;
 159    if (gp)
 160       active_shader_states |= gp->affected_states;
 161    if (fp)
 162       active_shader_states |= fp->affected_states;
 163    if (cp)
 164       active_shader_states |= cp->affected_states;
 165
 166    /* Mark non-shader-resource shader states as "always active". */
 167    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 168 }
 169
 170
 171 void
 172 st_invalidate_buffers(struct st_context *st)
 173 {
 174    st->dirty |= ST_NEW_BLEND |
 175                 ST_NEW_DSA |
 176                 ST_NEW_FB_STATE |
 177                 ST_NEW_SAMPLE_STATE |
 178                 ST_NEW_SAMPLE_SHADING |
 179                 ST_NEW_FS_STATE |
 180                 ST_NEW_POLY_STIPPLE |
 181                 ST_NEW_VIEWPORT |
 182                 ST_NEW_RASTERIZER |
 183                 ST_NEW_SCISSOR |
 184                 ST_NEW_WINDOW_RECTANGLES;
 185 }
 186
 187
 188 static inline bool
 189 st_vp_uses_current_values(const struct gl_context *ctx)
 190 {
 191    const uint64_t inputs = ctx->VertexProgram._Current->info.inputs_read;
 192    return _mesa_draw_current_bits(ctx) & inputs;
 193 }
 194
 195
 196 /**
 197  * Called via ctx->Driver.UpdateState()
 198  */
 199 static void
 200 st_invalidate_state(struct gl_context *ctx)
 201 {
 202    GLbitfield new_state = ctx->NewState;
 203    struct st_context *st = st_context(ctx);
 204
 205    if (new_state & _NEW_BUFFERS) {
 206       st_invalidate_buffers(st);
 207    } else {
 208       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 209        * check them when _NEW_BUFFERS isn't set.
 210        */
 211       if (new_state & _NEW_PROGRAM)
 212          st->dirty |= ST_NEW_RASTERIZER;
 213
 214       if (new_state & _NEW_FOG)
 215          st->dirty |= ST_NEW_FS_STATE;
 216
 217       if (new_state & _NEW_FRAG_CLAMP) {
 218          if (st->clamp_frag_color_in_shader)
 219             st->dirty |= ST_NEW_FS_STATE;
 220          else
 221             st->dirty |= ST_NEW_RASTERIZER;
 222       }
 223    }
 224
 225    if (new_state & (_NEW_LIGHT |
 226                     _NEW_POINT))
 227       st->dirty |= ST_NEW_RASTERIZER;
 228
 229    if (new_state & _NEW_PROJECTION &&
 230        st_user_clip_planes_enabled(ctx))
 231       st->dirty |= ST_NEW_CLIP_STATE;
 232
 233    if (new_state & _NEW_PIXEL)
 234       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 235
 236    if (new_state & _NEW_CURRENT_ATTRIB && st_vp_uses_current_values(ctx))
 237       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 238
 239    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 240    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 241       st->dirty |= ST_NEW_VS_STATE;
 242
 243    /* Which shaders are dirty will be determined manually. */
 244    if (new_state & _NEW_PROGRAM) {
 245       st->gfx_shaders_may_be_dirty = true;
 246       st->compute_shader_may_be_dirty = true;
 247       /* This will mask out unused shader resources. */
 248       st->active_states = st_get_active_states(ctx);
 249    }
 250
 251    if (new_state & _NEW_TEXTURE_OBJECT) {
 252       st->dirty |= st->active_states &
 253                    (ST_NEW_SAMPLER_VIEWS |
 254                     ST_NEW_SAMPLERS |
 255                     ST_NEW_IMAGE_UNITS);
 256       if (ctx->FragmentProgram._Current &&
 257           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 258          st->dirty |= ST_NEW_FS_STATE;
 259       }
 260    }
 261 }
 262
 263
 264 /*
 265  * In some circumstances (such as running google-chrome) the state
 266  * tracker may try to delete a resource view from a context different
 267  * than when it was created.  We don't want to do that.
 268  *
 269  * In that situation, st_texture_release_all_sampler_views() calls this
 270  * function to transfer the sampler view reference to this context (expected
 271  * to be the context which created the view.)
 272  */
 273 void
 274 st_save_zombie_sampler_view(struct st_context *st,
 275                             struct pipe_sampler_view *view)
 276 {
 277    struct st_zombie_sampler_view_node *entry;
 278
 279    assert(view->context == st->pipe);
 280
 281    entry = MALLOC_STRUCT(st_zombie_sampler_view_node);
 282    if (!entry)
 283       return;
 284
 285    entry->view = view;
 286
 287    /* We need a mutex since this function may be called from one thread
 288     * while free_zombie_resource_views() is called from another.
 289     */
 290    mtx_lock(&st->zombie_sampler_views.mutex);
 291    LIST_ADDTAIL(&entry->node, &st->zombie_sampler_views.list.node);
 292    mtx_unlock(&st->zombie_sampler_views.mutex);
 293 }
 294
 295
 296 /*
 297  * Since OpenGL shaders may be shared among contexts, we can wind up
 298  * with variants of a shader created with different contexts.
 299  * When we go to destroy a gallium shader, we want to free it with the
 300  * same context that it was created with, unless the driver reports
 301  * PIPE_CAP_SHAREABLE_SHADERS = TRUE.
 302  */
 303 void
 304 st_save_zombie_shader(struct st_context *st,
 305                       enum pipe_shader_type type,
 306                       struct pipe_shader_state *shader)
 307 {
 308    struct st_zombie_shader_node *entry;
 309
 310    /* we shouldn't be here if the driver supports shareable shaders */
 311    assert(!st->has_shareable_shaders);
 312
 313    entry = MALLOC_STRUCT(st_zombie_shader_node);
 314    if (!entry)
 315       return;
 316
 317    entry->shader = shader;
 318    entry->type = type;
 319
 320    /* We need a mutex since this function may be called from one thread
 321     * while free_zombie_shaders() is called from another.
 322     */
 323    mtx_lock(&st->zombie_shaders.mutex);
 324    LIST_ADDTAIL(&entry->node, &st->zombie_shaders.list.node);
 325    mtx_unlock(&st->zombie_shaders.mutex);
 326 }
 327
 328
 329 /*
 330  * Free any zombie sampler views that may be attached to this context.
 331  */
 332 static void
 333 free_zombie_sampler_views(struct st_context *st)
 334 {
 335    struct st_zombie_sampler_view_node *entry, *next;
 336
 337    if (LIST_IS_EMPTY(&st->zombie_sampler_views.list.node)) {
 338       return;
 339    }
 340
 341    mtx_lock(&st->zombie_sampler_views.mutex);
 342
 343    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 344                             &st->zombie_sampler_views.list.node, node) {
 345       LIST_DEL(&entry->node);  // remove this entry from the list
 346
 347       assert(entry->view->context == st->pipe);
 348       pipe_sampler_view_reference(&entry->view, NULL);
 349
 350       free(entry);
 351    }
 352
 353    assert(LIST_IS_EMPTY(&st->zombie_sampler_views.list.node));
 354
 355    mtx_unlock(&st->zombie_sampler_views.mutex);
 356 }
 357
 358
 359 /*
 360  * Free any zombie shaders that may be attached to this context.
 361  */
 362 static void
 363 free_zombie_shaders(struct st_context *st)
 364 {
 365    struct st_zombie_shader_node *entry, *next;
 366
 367    if (LIST_IS_EMPTY(&st->zombie_shaders.list.node)) {
 368       return;
 369    }
 370
 371    mtx_lock(&st->zombie_shaders.mutex);
 372
 373    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 374                             &st->zombie_shaders.list.node, node) {
 375       LIST_DEL(&entry->node);  // remove this entry from the list
 376
 377       switch (entry->type) {
 378       case PIPE_SHADER_VERTEX:
 379          cso_delete_vertex_shader(st->cso_context, entry->shader);
 380          break;
 381       case PIPE_SHADER_FRAGMENT:
 382          cso_delete_fragment_shader(st->cso_context, entry->shader);
 383          break;
 384       case PIPE_SHADER_GEOMETRY:
 385          cso_delete_geometry_shader(st->cso_context, entry->shader);
 386          break;
 387       case PIPE_SHADER_TESS_CTRL:
 388          cso_delete_tessctrl_shader(st->cso_context, entry->shader);
 389          break;
 390       case PIPE_SHADER_TESS_EVAL:
 391          cso_delete_tesseval_shader(st->cso_context, entry->shader);
 392          break;
 393       case PIPE_SHADER_COMPUTE:
 394          cso_delete_compute_shader(st->cso_context, entry->shader);
 395          break;
 396       default:
 397          unreachable("invalid shader type in free_zombie_shaders()");
 398       }
 399       free(entry);
 400    }
 401
 402    assert(LIST_IS_EMPTY(&st->zombie_shaders.list.node));
 403
 404    mtx_unlock(&st->zombie_shaders.mutex);
 405 }
 406
 407
 408 /*
 409  * This function is called periodically to free any zombie objects
 410  * which are attached to this context.
 411  */
 412 void
 413 st_context_free_zombie_objects(struct st_context *st)
 414 {
 415    free_zombie_sampler_views(st);
 416    free_zombie_shaders(st);
 417 }
 418
 419
 420 static void
 421 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 422 {
 423    uint i;
 424
 425    st_destroy_atoms(st);
 426    st_destroy_draw(st);
 427    st_destroy_clear(st);
 428    st_destroy_bitmap(st);
 429    st_destroy_drawpix(st);
 430    st_destroy_drawtex(st);
 431    st_destroy_perfmon(st);
 432    st_destroy_pbo_helpers(st);
 433    st_destroy_bound_texture_handles(st);
 434    st_destroy_bound_image_handles(st);
 435
 436    for (i = 0; i < ARRAY_SIZE(st->state.frag_sampler_views); i++) {
 437       pipe_sampler_view_release(st->pipe,
 438                                 &st->state.frag_sampler_views[i]);
 439    }
 440
 441    /* free glReadPixels cache data */
 442    st_invalidate_readpix_cache(st);
 443    util_throttle_deinit(st->pipe->screen, &st->throttle);
 444
 445    cso_destroy_context(st->cso_context);
 446
 447    if (st->pipe && destroy_pipe)
 448       st->pipe->destroy(st->pipe);
 449
 450    free(st);
 451 }
 452
 453
 454 static void
 455 st_init_driver_flags(struct st_context *st)
 456 {
 457    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 458
 459    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 460    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 461    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 462    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 463    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 464
 465    /* Shader resources */
 466    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 467    if (st->has_hw_atomics)
 468       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS | ST_NEW_CS_ATOMICS;
 469    else
 470       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 471    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 472    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 473
 474    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 475    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 476    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 477    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 478    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 479    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 480
 481    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 482    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 483    f->NewScissorRect = ST_NEW_SCISSOR;
 484    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 485    f->NewAlphaTest = ST_NEW_DSA;
 486    f->NewBlend = ST_NEW_BLEND;
 487    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 488    f->NewColorMask = ST_NEW_BLEND;
 489    f->NewDepth = ST_NEW_DSA;
 490    f->NewLogicOp = ST_NEW_BLEND;
 491    f->NewStencil = ST_NEW_DSA;
 492    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 493                              ST_NEW_SAMPLE_STATE | ST_NEW_SAMPLE_SHADING;
 494    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 495    f->NewSampleMask = ST_NEW_SAMPLE_STATE;
 496    f->NewSampleLocations = ST_NEW_SAMPLE_STATE;
 497    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 498
 499    /* This depends on what the gallium driver wants. */
 500    if (st->force_persample_in_shader) {
 501       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 502       f->NewSampleShading |= ST_NEW_FS_STATE;
 503    } else {
 504       f->NewSampleShading |= ST_NEW_RASTERIZER;
 505    }
 506
 507    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 508    f->NewClipPlane = ST_NEW_CLIP_STATE;
 509    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 510    f->NewDepthClamp = ST_NEW_RASTERIZER;
 511    f->NewLineState = ST_NEW_RASTERIZER;
 512    f->NewPolygonState = ST_NEW_RASTERIZER;
 513    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 514    f->NewViewport = ST_NEW_VIEWPORT;
 515    f->NewNvConservativeRasterization = ST_NEW_RASTERIZER;
 516    f->NewNvConservativeRasterizationParams = ST_NEW_RASTERIZER;
 517 }
 518
 519
 520 static struct st_context *
 521 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 522                        const struct st_config_options *options, bool no_error)
 523 {
 524    struct pipe_screen *screen = pipe->screen;
 525    uint i;
 526    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 527
 528    st->options = *options;
 529
 530    ctx->st = st;
 531
 532    st->ctx = ctx;
 533    st->pipe = pipe;
 534
 535    /* state tracker needs the VBO module */
 536    _vbo_CreateContext(ctx);
 537
 538    st->dirty = ST_ALL_STATES_MASK;
 539
 540    st->can_bind_const_buffer_as_vertex =
 541       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 542
 543    /* st/mesa always uploads zero-stride vertex attribs, and other user
 544     * vertex buffers are only possible with a compatibility profile.
 545     * So tell the u_vbuf module that user VBOs are not possible with the Core
 546     * profile, so that u_vbuf is bypassed completely if there is nothing else
 547     * to do.
 548     */
 549    unsigned vbuf_flags =
 550       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 551    st->cso_context = cso_create_context(pipe, vbuf_flags);
 552
 553    st_init_atoms(st);
 554    st_init_clear(st);
 555    st_init_pbo_helpers(st);
 556
 557    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 558    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 559       st->internal_target = PIPE_TEXTURE_2D;
 560    else
 561       st->internal_target = PIPE_TEXTURE_RECT;
 562
 563    /* Setup vertex element info for 'struct st_util_vertex'.
 564     */
 565    {
 566       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 567
 568       memset(&st->util_velems, 0, sizeof(st->util_velems));
 569       st->util_velems[0].src_offset = 0;
 570       st->util_velems[0].vertex_buffer_index = 0;
 571       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 572       st->util_velems[1].src_offset = 3 * sizeof(float);
 573       st->util_velems[1].vertex_buffer_index = 0;
 574       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 575       st->util_velems[2].src_offset = 7 * sizeof(float);
 576       st->util_velems[2].vertex_buffer_index = 0;
 577       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 578    }
 579
 580    /* we want all vertex data to be placed in buffer objects */
 581    vbo_use_buffer_objects(ctx);
 582
 583
 584    /* make sure that no VBOs are left mapped when we're drawing. */
 585    vbo_always_unmap_buffers(ctx);
 586
 587    /* Need these flags:
 588     */
 589    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 590
 591    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 592
 593    if (no_error)
 594       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 595
 596    ctx->Const.PackedDriverUniformStorage =
 597       screen->get_param(screen, PIPE_CAP_PACKED_UNIFORMS);
 598
 599    st->has_stencil_export =
 600       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 601    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 602    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 603                                               PIPE_TEXTURE_2D, 0, 0,
 604                                               PIPE_BIND_SAMPLER_VIEW);
 605    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 606                                               PIPE_TEXTURE_2D, 0, 0,
 607                                               PIPE_BIND_SAMPLER_VIEW);
 608    st->has_astc_2d_ldr =
 609       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
 610                                   PIPE_TEXTURE_2D, 0, 0, PIPE_BIND_SAMPLER_VIEW);
 611    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 612                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 613    st->force_persample_in_shader =
 614       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 615       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 616    st->has_shareable_shaders = screen->get_param(screen,
 617                                                  PIPE_CAP_SHAREABLE_SHADERS);
 618    st->needs_texcoord_semantic =
 619       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 620    st->apply_texture_swizzle_to_border_color =
 621       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 622          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 623           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 624    st->has_time_elapsed =
 625       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 626    st->has_half_float_packing =
 627       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 628    st->has_multi_draw_indirect =
 629       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 630    st->has_single_pipe_stat =
 631       screen->get_param(screen, PIPE_CAP_QUERY_PIPELINE_STATISTICS_SINGLE);
 632    st->has_indep_blend_func =
 633       screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC);
 634    st->needs_rgb_dst_alpha_override =
 635       screen->get_param(screen, PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND);
 636
 637    st->has_hw_atomics =
 638       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 639                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 640       ? true : false;
 641
 642    util_throttle_init(&st->throttle,
 643                       screen->get_param(screen,
 644                                         PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET));
 645
 646    /* GL limits and extensions */
 647    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions, ctx->API);
 648    st_init_extensions(pipe->screen, &ctx->Const,
 649                       &ctx->Extensions, &st->options, ctx->API);
 650
 651    if (st_have_perfmon(st)) {
 652       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 653    }
 654
 655    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 656    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 657       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 658          st->clamp_vert_color_in_shader = GL_TRUE;
 659       }
 660
 661       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 662          st->clamp_frag_color_in_shader = GL_TRUE;
 663       }
 664
 665       /* For drivers which cannot do color clamping, it's better to just
 666        * disable ARB_color_buffer_float in the core profile, because
 667        * the clamping is deprecated there anyway. */
 668       if (ctx->API == API_OPENGL_CORE &&
 669           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 670          st->clamp_vert_color_in_shader = GL_FALSE;
 671          st->clamp_frag_color_in_shader = GL_FALSE;
 672          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 673       }
 674    }
 675
 676    /* called after _mesa_create_context/_mesa_init_point, fix default user
 677     * settable max point size up
 678     */
 679    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 680                              ctx->Const.MaxPointSizeAA);
 681    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 682     * is not supported
 683     */
 684    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 685       !st->has_shader_model3;
 686
 687    if (!ctx->Extensions.ARB_gpu_shader5) {
 688       for (i = 0; i < MESA_SHADER_STAGES; i++)
 689          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 690    }
 691
 692    /* Set which shader types can be compiled at link time. */
 693    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 694          st->has_shareable_shaders &&
 695          !st->clamp_vert_color_in_shader;
 696
 697    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 698          st->has_shareable_shaders &&
 699          !st->clamp_frag_color_in_shader &&
 700          !st->force_persample_in_shader;
 701
 702    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 703    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 704    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 705    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 706
 707    st->bitmap.cache.empty = true;
 708
 709    _mesa_override_extensions(ctx);
 710    _mesa_compute_version(ctx);
 711
 712    if (ctx->Version == 0) {
 713       /* This can happen when a core profile was requested, but the driver
 714        * does not support some features of GL 3.1 or later.
 715        */
 716       st_destroy_context_priv(st, false);
 717       return NULL;
 718    }
 719
 720    _mesa_initialize_dispatch_tables(ctx);
 721    _mesa_initialize_vbo_vtxfmt(ctx);
 722    st_init_driver_flags(st);
 723
 724    /* Initialize context's winsys buffers list */
 725    LIST_INITHEAD(&st->winsys_buffers);
 726
 727    LIST_INITHEAD(&st->zombie_sampler_views.list.node);
 728    mtx_init(&st->zombie_sampler_views.mutex, mtx_plain);
 729    LIST_INITHEAD(&st->zombie_shaders.list.node);
 730    mtx_init(&st->zombie_shaders.mutex, mtx_plain);
 731
 732    return st;
 733 }
 734
 735
 736 static void
 737 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 738 {
 739    struct st_context *st = ctx->st;
 740    st->pipe->emit_string_marker(st->pipe, string, len);
 741 }
 742
 743
 744 static void
 745 st_set_background_context(struct gl_context *ctx,
 746                           struct util_queue_monitoring *queue_info)
 747 {
 748    struct st_context *st = ctx->st;
 749    struct st_manager *smapi =
 750       (struct st_manager *) st->iface.st_context_private;
 751
 752    assert(smapi->set_background_context);
 753    smapi->set_background_context(&st->iface, queue_info);
 754 }
 755
 756
 757 static void
 758 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 759 {
 760    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 761
 762    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 763    memset(uuid, 0, GL_UUID_SIZE_EXT);
 764    screen->get_device_uuid(screen, uuid);
 765 }
 766
 767
 768 static void
 769 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 770 {
 771    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 772
 773    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 774    memset(uuid, 0, GL_UUID_SIZE_EXT);
 775    screen->get_driver_uuid(screen, uuid);
 776 }
 777
 778
 779 static void
 780 st_init_driver_functions(struct pipe_screen *screen,
 781                          struct dd_function_table *functions)
 782 {
 783    _mesa_init_sampler_object_functions(functions);
 784
 785    st_init_draw_functions(functions);
 786    st_init_blit_functions(functions);
 787    st_init_bufferobject_functions(screen, functions);
 788    st_init_clear_functions(functions);
 789    st_init_bitmap_functions(functions);
 790    st_init_copy_image_functions(functions);
 791    st_init_drawpixels_functions(functions);
 792    st_init_rasterpos_functions(functions);
 793
 794    st_init_drawtex_functions(functions);
 795
 796    st_init_eglimage_functions(functions);
 797
 798    st_init_fbo_functions(functions);
 799    st_init_feedback_functions(functions);
 800    st_init_memoryobject_functions(functions);
 801    st_init_msaa_functions(functions);
 802    st_init_perfmon_functions(functions);
 803    st_init_program_functions(functions);
 804    st_init_query_functions(functions);
 805    st_init_cond_render_functions(functions);
 806    st_init_readpixels_functions(functions);
 807    st_init_semaphoreobject_functions(functions);
 808    st_init_texture_functions(functions);
 809    st_init_texture_barrier_functions(functions);
 810    st_init_flush_functions(screen, functions);
 811    st_init_string_functions(functions);
 812    st_init_viewport_functions(functions);
 813    st_init_compute_functions(functions);
 814
 815    st_init_xformfb_functions(functions);
 816    st_init_syncobj_functions(functions);
 817
 818    st_init_vdpau_functions(functions);
 819
 820    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 821       functions->EmitStringMarker = st_emit_string_marker;
 822
 823    functions->Enable = st_Enable;
 824    functions->UpdateState = st_invalidate_state;
 825    functions->QueryMemoryInfo = st_query_memory_info;
 826    functions->SetBackgroundContext = st_set_background_context;
 827    functions->GetDriverUuid = st_get_driver_uuid;
 828    functions->GetDeviceUuid = st_get_device_uuid;
 829
 830    /* GL_ARB_get_program_binary */
 831    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 832
 833    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 834       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 835                                PIPE_SHADER_CAP_PREFERRED_IR);
 836    if (preferred_ir == PIPE_SHADER_IR_NIR) {
 837       functions->ShaderCacheSerializeDriverBlob =  st_serialise_nir_program;
 838       functions->ProgramBinarySerializeDriverBlob =
 839          st_serialise_nir_program_binary;
 840       functions->ProgramBinaryDeserializeDriverBlob =
 841          st_deserialise_nir_program;
 842    } else {
 843       functions->ShaderCacheSerializeDriverBlob =  st_serialise_tgsi_program;
 844       functions->ProgramBinarySerializeDriverBlob =
 845          st_serialise_tgsi_program_binary;
 846       functions->ProgramBinaryDeserializeDriverBlob =
 847          st_deserialise_tgsi_program;
 848    }
 849 }
 850
 851
 852 struct st_context *
 853 st_create_context(gl_api api, struct pipe_context *pipe,
 854                   const struct gl_config *visual,
 855                   struct st_context *share,
 856                   const struct st_config_options *options,
 857                   bool no_error)
 858 {
 859    struct gl_context *ctx;
 860    struct gl_context *shareCtx = share ? share->ctx : NULL;
 861    struct dd_function_table funcs;
 862    struct st_context *st;
 863
 864    util_cpu_detect();
 865
 866    memset(&funcs, 0, sizeof(funcs));
 867    st_init_driver_functions(pipe->screen, &funcs);
 868
 869    ctx = calloc(1, sizeof(struct gl_context));
 870    if (!ctx)
 871       return NULL;
 872
 873    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 874       free(ctx);
 875       return NULL;
 876    }
 877
 878    st_debug_init();
 879
 880    if (pipe->screen->get_disk_shader_cache &&
 881        !(ST_DEBUG & DEBUG_TGSI))
 882       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 883
 884    /* XXX: need a capability bit in gallium to query if the pipe
 885     * driver prefers DP4 or MUL/MAD for vertex transformation.
 886     */
 887    if (debug_get_option_mesa_mvp_dp4())
 888       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 889
 890    st = st_create_context_priv(ctx, pipe, options, no_error);
 891    if (!st) {
 892       _mesa_destroy_context(ctx);
 893    }
 894
 895    return st;
 896 }
 897
 898
 899 /**
 900  * When we destroy a context, we must examine all texture objects to
 901  * find/release any sampler views created by that context.
 902  *
 903  * This callback is called per-texture object.  It releases all the
 904  * texture's sampler views which belong to the context.
 905  */
 906 static void
 907 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 908 {
 909    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 910    struct st_context *st = (struct st_context *) userData;
 911
 912    st_texture_release_context_sampler_view(st, st_texture_object(texObj));
 913 }
 914
 915
 916 void
 917 st_destroy_context(struct st_context *st)
 918 {
 919    struct gl_context *ctx = st->ctx;
 920    struct st_framebuffer *stfb, *next;
 921
 922    GET_CURRENT_CONTEXT(curctx);
 923
 924    if (curctx == NULL) {
 925       /* No current context, but we need one to release
 926        * renderbuffer surface when we release framebuffer.
 927        * So temporarily bind the context.
 928        */
 929       _mesa_make_current(ctx, NULL, NULL);
 930    }
 931
 932    st_context_free_zombie_objects(st);
 933
 934    mtx_destroy(&st->zombie_sampler_views.mutex);
 935    mtx_destroy(&st->zombie_shaders.mutex);
 936
 937    /* This must be called first so that glthread has a chance to finish */
 938    _mesa_glthread_destroy(ctx);
 939
 940    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 941
 942    st_reference_fragprog(st, &st->fp, NULL);
 943    st_reference_prog(st, &st->gp, NULL);
 944    st_reference_vertprog(st, &st->vp, NULL);
 945    st_reference_prog(st, &st->tcp, NULL);
 946    st_reference_prog(st, &st->tep, NULL);
 947    st_reference_compprog(st, &st->cp, NULL);
 948
 949    /* release framebuffer in the winsys buffers list */
 950    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 951       st_framebuffer_reference(&stfb, NULL);
 952    }
 953
 954    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 955    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 956
 957    _vbo_DestroyContext(ctx);
 958
 959    st_destroy_program_variants(st);
 960
 961    _mesa_free_context_data(ctx);
 962
 963    /* This will free the st_context too, so 'st' must not be accessed
 964     * afterwards. */
 965    st_destroy_context_priv(st, true);
 966    st = NULL;
 967
 968    free(ctx);
 969 }