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/samplerobj.h"
  33 #include "main/shaderobj.h"
  34 #include "main/version.h"
  35 #include "main/vtxfmt.h"
  36 #include "main/hash.h"
  37 #include "program/prog_cache.h"
  38 #include "vbo/vbo.h"
  39 #include "glapi/glapi.h"
  40 #include "st_context.h"
  41 #include "st_debug.h"
  42 #include "st_cb_bitmap.h"
  43 #include "st_cb_blit.h"
  44 #include "st_cb_bufferobjects.h"
  45 #include "st_cb_clear.h"
  46 #include "st_cb_compute.h"
  47 #include "st_cb_condrender.h"
  48 #include "st_cb_copyimage.h"
  49 #include "st_cb_drawpixels.h"
  50 #include "st_cb_rasterpos.h"
  51 #include "st_cb_drawtex.h"
  52 #include "st_cb_eglimage.h"
  53 #include "st_cb_fbo.h"
  54 #include "st_cb_feedback.h"
  55 #include "st_cb_msaa.h"
  56 #include "st_cb_perfmon.h"
  57 #include "st_cb_program.h"
  58 #include "st_cb_queryobj.h"
  59 #include "st_cb_readpixels.h"
  60 #include "st_cb_texture.h"
  61 #include "st_cb_xformfb.h"
  62 #include "st_cb_flush.h"
  63 #include "st_cb_syncobj.h"
  64 #include "st_cb_strings.h"
  65 #include "st_cb_texturebarrier.h"
  66 #include "st_cb_viewport.h"
  67 #include "st_atom.h"
  68 #include "st_draw.h"
  69 #include "st_extensions.h"
  70 #include "st_gen_mipmap.h"
  71 #include "st_pbo.h"
  72 #include "st_program.h"
  73 #include "st_sampler_view.h"
  74 #include "st_vdpau.h"
  75 #include "st_texture.h"
  76 #include "pipe/p_context.h"
  77 #include "util/u_inlines.h"
  78 #include "util/u_upload_mgr.h"
  79 #include "util/u_vbuf.h"
  80 #include "cso_cache/cso_context.h"
  81
  82
  83 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  84
  85
  86 /**
  87  * Called via ctx->Driver.Enable()
  88  */
  89 static void st_Enable(struct gl_context * ctx, GLenum cap, GLboolean state)
  90 {
  91    struct st_context *st = st_context(ctx);
  92
  93    switch (cap) {
  94    case GL_DEBUG_OUTPUT:
  95    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
  96       st_update_debug_callback(st);
  97       break;
  98    default:
  99       break;
 100    }
 101 }
 102
 103
 104 /**
 105  * Called via ctx->Driver.QueryMemoryInfo()
 106  */
 107 static void
 108 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 109 {
 110    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 111    struct pipe_memory_info info;
 112
 113    assert(screen->query_memory_info);
 114    if (!screen->query_memory_info)
 115       return;
 116
 117    screen->query_memory_info(screen, &info);
 118
 119    out->total_device_memory = info.total_device_memory;
 120    out->avail_device_memory = info.avail_device_memory;
 121    out->total_staging_memory = info.total_staging_memory;
 122    out->avail_staging_memory = info.avail_staging_memory;
 123    out->device_memory_evicted = info.device_memory_evicted;
 124    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 125 }
 126
 127
 128 uint64_t
 129 st_get_active_states(struct gl_context *ctx)
 130 {
 131    struct st_vertex_program *vp =
 132       st_vertex_program(ctx->VertexProgram._Current);
 133    struct st_tessctrl_program *tcp =
 134       st_tessctrl_program(ctx->TessCtrlProgram._Current);
 135    struct st_tesseval_program *tep =
 136       st_tesseval_program(ctx->TessEvalProgram._Current);
 137    struct st_geometry_program *gp =
 138       st_geometry_program(ctx->GeometryProgram._Current);
 139    struct st_fragment_program *fp =
 140       st_fragment_program(ctx->FragmentProgram._Current);
 141    struct st_compute_program *cp =
 142       st_compute_program(ctx->ComputeProgram._Current);
 143    uint64_t active_shader_states = 0;
 144
 145    if (vp)
 146       active_shader_states |= vp->affected_states;
 147    if (tcp)
 148       active_shader_states |= tcp->affected_states;
 149    if (tep)
 150       active_shader_states |= tep->affected_states;
 151    if (gp)
 152       active_shader_states |= gp->affected_states;
 153    if (fp)
 154       active_shader_states |= fp->affected_states;
 155    if (cp)
 156       active_shader_states |= cp->affected_states;
 157
 158    /* Mark non-shader-resource shader states as "always active". */
 159    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 160 }
 161
 162
 163 /**
 164  * Called via ctx->Driver.UpdateState()
 165  */
 166 void st_invalidate_state(struct gl_context * ctx, GLbitfield new_state)
 167 {
 168    struct st_context *st = st_context(ctx);
 169
 170    if (new_state & _NEW_BUFFERS) {
 171       st->dirty |= ST_NEW_BLEND |
 172                    ST_NEW_DSA |
 173                    ST_NEW_FB_STATE |
 174                    ST_NEW_SAMPLE_MASK |
 175                    ST_NEW_SAMPLE_SHADING |
 176                    ST_NEW_FS_STATE |
 177                    ST_NEW_POLY_STIPPLE |
 178                    ST_NEW_VIEWPORT |
 179                    ST_NEW_RASTERIZER |
 180                    ST_NEW_SCISSOR |
 181                    ST_NEW_WINDOW_RECTANGLES;
 182    } else {
 183       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 184        * check them when _NEW_BUFFERS isn't set.
 185        */
 186       if (new_state & (_NEW_DEPTH |
 187                        _NEW_STENCIL))
 188          st->dirty |= ST_NEW_DSA;
 189
 190       if (new_state & _NEW_PROGRAM)
 191          st->dirty |= ST_NEW_RASTERIZER;
 192
 193       if (new_state & _NEW_SCISSOR)
 194          st->dirty |= ST_NEW_RASTERIZER |
 195                       ST_NEW_SCISSOR |
 196                       ST_NEW_WINDOW_RECTANGLES;
 197
 198       if (new_state & _NEW_FOG)
 199          st->dirty |= ST_NEW_FS_STATE;
 200
 201       if (new_state & _NEW_POLYGONSTIPPLE)
 202          st->dirty |= ST_NEW_POLY_STIPPLE;
 203
 204       if (new_state & _NEW_VIEWPORT)
 205          st->dirty |= ST_NEW_VIEWPORT;
 206
 207       if (new_state & _NEW_FRAG_CLAMP) {
 208          if (st->clamp_frag_color_in_shader)
 209             st->dirty |= ST_NEW_FS_STATE;
 210          else
 211             st->dirty |= ST_NEW_RASTERIZER;
 212       }
 213    }
 214
 215    if (new_state & _NEW_MULTISAMPLE) {
 216       st->dirty |= ST_NEW_BLEND |
 217                    ST_NEW_SAMPLE_MASK |
 218                    ST_NEW_SAMPLE_SHADING |
 219                    ST_NEW_RASTERIZER |
 220                    ST_NEW_FS_STATE;
 221    } else {
 222       /* These set a subset of flags set by _NEW_MULTISAMPLE, so we only
 223        * have to check them when _NEW_MULTISAMPLE isn't set.
 224        */
 225       if (new_state & (_NEW_LIGHT |
 226                        _NEW_LINE |
 227                        _NEW_POINT |
 228                        _NEW_POLYGON |
 229                        _NEW_TRANSFORM))
 230          st->dirty |= ST_NEW_RASTERIZER;
 231    }
 232
 233    if (new_state & (_NEW_PROJECTION |
 234                     _NEW_TRANSFORM) &&
 235        st_user_clip_planes_enabled(ctx))
 236       st->dirty |= ST_NEW_CLIP_STATE;
 237
 238    if (new_state & _NEW_COLOR)
 239       st->dirty |= ST_NEW_BLEND |
 240                    ST_NEW_DSA;
 241
 242    if (new_state & _NEW_PIXEL)
 243       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 244
 245    if (new_state & _NEW_CURRENT_ATTRIB)
 246       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 247
 248    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 249    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 250       st->dirty |= ST_NEW_VS_STATE;
 251
 252    /* Which shaders are dirty will be determined manually. */
 253    if (new_state & _NEW_PROGRAM) {
 254       st->gfx_shaders_may_be_dirty = true;
 255       st->compute_shader_may_be_dirty = true;
 256       /* This will mask out unused shader resources. */
 257       st->active_states = st_get_active_states(ctx);
 258    }
 259
 260    if (new_state & _NEW_TEXTURE) {
 261       st->dirty |= st->active_states &
 262                    (ST_NEW_SAMPLER_VIEWS |
 263                     ST_NEW_SAMPLERS |
 264                     ST_NEW_IMAGE_UNITS);
 265       if (ctx->FragmentProgram._Current &&
 266           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 267          st->dirty |= ST_NEW_FS_STATE;
 268       }
 269    }
 270
 271    if (new_state & _NEW_PROGRAM_CONSTANTS)
 272       st->dirty |= st->active_states & ST_NEW_CONSTANTS;
 273
 274    /* This is the only core Mesa module we depend upon.
 275     * No longer use swrast, swsetup, tnl.
 276     */
 277    _vbo_InvalidateState(ctx, new_state);
 278 }
 279
 280
 281 static void
 282 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 283 {
 284    uint shader, i;
 285
 286    st_destroy_atoms( st );
 287    st_destroy_draw( st );
 288    st_destroy_clear(st);
 289    st_destroy_bitmap(st);
 290    st_destroy_drawpix(st);
 291    st_destroy_drawtex(st);
 292    st_destroy_perfmon(st);
 293    st_destroy_pbo_helpers(st);
 294
 295    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 296       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 297          pipe_sampler_view_release(st->pipe,
 298                                    &st->state.sampler_views[shader][i]);
 299       }
 300    }
 301
 302    /* free glDrawPixels cache data */
 303    free(st->drawpix_cache.image);
 304    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 305
 306    /* free glReadPixels cache data */
 307    st_invalidate_readpix_cache(st);
 308
 309    cso_destroy_context(st->cso_context);
 310
 311    if (st->pipe && destroy_pipe)
 312       st->pipe->destroy(st->pipe);
 313
 314    free( st );
 315 }
 316
 317
 318 static struct st_context *
 319 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 320                 const struct st_config_options *options)
 321 {
 322    struct pipe_screen *screen = pipe->screen;
 323    uint i;
 324    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 325
 326    st->options = *options;
 327
 328    ctx->st = st;
 329
 330    st->ctx = ctx;
 331    st->pipe = pipe;
 332
 333    /* XXX: this is one-off, per-screen init: */
 334    st_debug_init();
 335
 336    /* state tracker needs the VBO module */
 337    _vbo_CreateContext(ctx);
 338
 339    st->dirty = ST_ALL_STATES_MASK;
 340
 341    st->has_user_constbuf =
 342       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 343
 344    /* Drivers still have to upload zero-stride vertex attribs manually
 345     * with the GL core profile, but they don't have to deal with any complex
 346     * user vertex buffer uploads.
 347     */
 348    unsigned vbuf_flags =
 349       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 350    st->cso_context = cso_create_context(pipe, vbuf_flags);
 351
 352    st_init_atoms( st );
 353    st_init_clear(st);
 354    st_init_draw( st );
 355    st_init_pbo_helpers(st);
 356
 357    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 358    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 359       st->internal_target = PIPE_TEXTURE_2D;
 360    else
 361       st->internal_target = PIPE_TEXTURE_RECT;
 362
 363    /* Setup vertex element info for 'struct st_util_vertex'.
 364     */
 365    {
 366       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 367
 368       /* If this assertion ever fails all state tracker calls to
 369        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 370        * particular call would have to be moved to just before each
 371        * drawing call.
 372        */
 373       assert(slot == 0);
 374
 375       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 376
 377       memset(&st->util_velems, 0, sizeof(st->util_velems));
 378       st->util_velems[0].src_offset = 0;
 379       st->util_velems[0].vertex_buffer_index = slot;
 380       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 381       st->util_velems[1].src_offset = 3 * sizeof(float);
 382       st->util_velems[1].vertex_buffer_index = slot;
 383       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 384       st->util_velems[2].src_offset = 7 * sizeof(float);
 385       st->util_velems[2].vertex_buffer_index = slot;
 386       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 387    }
 388
 389    /* we want all vertex data to be placed in buffer objects */
 390    vbo_use_buffer_objects(ctx);
 391
 392
 393    /* make sure that no VBOs are left mapped when we're drawing. */
 394    vbo_always_unmap_buffers(ctx);
 395
 396    /* Need these flags:
 397     */
 398    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 399
 400    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 401
 402    st->has_stencil_export =
 403       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 404    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 405    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 406                                               PIPE_TEXTURE_2D, 0,
 407                                               PIPE_BIND_SAMPLER_VIEW);
 408    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 409                                               PIPE_TEXTURE_2D, 0,
 410                                               PIPE_BIND_SAMPLER_VIEW);
 411    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 412                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 413    st->force_persample_in_shader =
 414       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 415       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 416    st->has_shareable_shaders = screen->get_param(screen,
 417                                                  PIPE_CAP_SHAREABLE_SHADERS);
 418    st->needs_texcoord_semantic =
 419       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 420    st->apply_texture_swizzle_to_border_color =
 421       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 422          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 423           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 424    st->has_time_elapsed =
 425       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 426    st->has_half_float_packing =
 427       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 428    st->has_multi_draw_indirect =
 429       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 430
 431    /* GL limits and extensions */
 432    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 433    st_init_extensions(pipe->screen, &ctx->Const,
 434                       &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
 435
 436    if (st_have_perfmon(st)) {
 437       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 438    }
 439
 440    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 441    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 442       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 443          st->clamp_vert_color_in_shader = GL_TRUE;
 444       }
 445
 446       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 447          st->clamp_frag_color_in_shader = GL_TRUE;
 448       }
 449
 450       /* For drivers which cannot do color clamping, it's better to just
 451        * disable ARB_color_buffer_float in the core profile, because
 452        * the clamping is deprecated there anyway. */
 453       if (ctx->API == API_OPENGL_CORE &&
 454           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 455          st->clamp_vert_color_in_shader = GL_FALSE;
 456          st->clamp_frag_color_in_shader = GL_FALSE;
 457          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 458       }
 459    }
 460
 461    /* called after _mesa_create_context/_mesa_init_point, fix default user
 462     * settable max point size up
 463     */
 464    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 465                              ctx->Const.MaxPointSizeAA);
 466    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 467    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 468
 469    if (!ctx->Extensions.ARB_gpu_shader5) {
 470       for (i = 0; i < MESA_SHADER_STAGES; i++)
 471          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 472    }
 473
 474    /* Set which shader types can be compiled at link time. */
 475    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 476          st->has_shareable_shaders &&
 477          !st->clamp_vert_color_in_shader;
 478
 479    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 480          st->has_shareable_shaders &&
 481          !st->clamp_frag_color_in_shader &&
 482          !st->force_persample_in_shader;
 483
 484    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 485    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 486    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 487    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 488
 489    _mesa_compute_version(ctx);
 490
 491    if (ctx->Version == 0) {
 492       /* This can happen when a core profile was requested, but the driver
 493        * does not support some features of GL 3.1 or later.
 494        */
 495       st_destroy_context_priv(st, false);
 496       return NULL;
 497    }
 498
 499    _mesa_initialize_dispatch_tables(ctx);
 500    _mesa_initialize_vbo_vtxfmt(ctx);
 501
 502    return st;
 503 }
 504
 505 static void st_init_driver_flags(struct gl_driver_flags *f)
 506 {
 507    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 508    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 509    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 510    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 511    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 512    f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 513    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 514    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 515 }
 516
 517 struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
 518                                      const struct gl_config *visual,
 519                                      struct st_context *share,
 520                                      const struct st_config_options *options)
 521 {
 522    struct gl_context *ctx;
 523    struct gl_context *shareCtx = share ? share->ctx : NULL;
 524    struct dd_function_table funcs;
 525    struct st_context *st;
 526
 527    memset(&funcs, 0, sizeof(funcs));
 528    st_init_driver_functions(pipe->screen, &funcs);
 529
 530    ctx = calloc(1, sizeof(struct gl_context));
 531    if (!ctx)
 532       return NULL;
 533
 534    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 535       free(ctx);
 536       return NULL;
 537    }
 538
 539    if (pipe->screen->get_disk_shader_cache)
 540       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 541
 542    st_init_driver_flags(&ctx->DriverFlags);
 543
 544    /* XXX: need a capability bit in gallium to query if the pipe
 545     * driver prefers DP4 or MUL/MAD for vertex transformation.
 546     */
 547    if (debug_get_option_mesa_mvp_dp4())
 548       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 549
 550    st = st_create_context_priv(ctx, pipe, options);
 551    if (!st) {
 552       _mesa_destroy_context(ctx);
 553    }
 554
 555    return st;
 556 }
 557
 558
 559 /**
 560  * Callback to release the sampler view attached to a texture object.
 561  * Called by _mesa_HashWalk().
 562  */
 563 static void
 564 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 565 {
 566    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 567    struct st_context *st = (struct st_context *) userData;
 568
 569    st_texture_release_sampler_view(st, st_texture_object(texObj));
 570 }
 571
 572 void st_destroy_context( struct st_context *st )
 573 {
 574    struct gl_context *ctx = st->ctx;
 575    GLuint i;
 576
 577    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 578
 579    st_reference_fragprog(st, &st->fp, NULL);
 580    st_reference_geomprog(st, &st->gp, NULL);
 581    st_reference_vertprog(st, &st->vp, NULL);
 582    st_reference_tesscprog(st, &st->tcp, NULL);
 583    st_reference_tesseprog(st, &st->tep, NULL);
 584    st_reference_compprog(st, &st->cp, NULL);
 585
 586    /* release framebuffer surfaces */
 587    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 588       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 589    }
 590    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 591    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 592    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 593
 594    _vbo_DestroyContext(ctx);
 595
 596    st_destroy_program_variants(st);
 597
 598    _mesa_free_context_data(ctx);
 599
 600    /* This will free the st_context too, so 'st' must not be accessed
 601     * afterwards. */
 602    st_destroy_context_priv(st, true);
 603    st = NULL;
 604
 605    free(ctx);
 606 }
 607
 608 static void
 609 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 610 {
 611    struct st_context *st = ctx->st;
 612    st->pipe->emit_string_marker(st->pipe, string, len);
 613 }
 614
 615 void st_init_driver_functions(struct pipe_screen *screen,
 616                               struct dd_function_table *functions)
 617 {
 618    _mesa_init_shader_object_functions(functions);
 619    _mesa_init_sampler_object_functions(functions);
 620
 621    st_init_blit_functions(functions);
 622    st_init_bufferobject_functions(screen, functions);
 623    st_init_clear_functions(functions);
 624    st_init_bitmap_functions(functions);
 625    st_init_copy_image_functions(functions);
 626    st_init_drawpixels_functions(functions);
 627    st_init_rasterpos_functions(functions);
 628
 629    st_init_drawtex_functions(functions);
 630
 631    st_init_eglimage_functions(functions);
 632
 633    st_init_fbo_functions(functions);
 634    st_init_feedback_functions(functions);
 635    st_init_msaa_functions(functions);
 636    st_init_perfmon_functions(functions);
 637    st_init_program_functions(functions);
 638    st_init_query_functions(functions);
 639    st_init_cond_render_functions(functions);
 640    st_init_readpixels_functions(functions);
 641    st_init_texture_functions(functions);
 642    st_init_texture_barrier_functions(functions);
 643    st_init_flush_functions(screen, functions);
 644    st_init_string_functions(functions);
 645    st_init_viewport_functions(functions);
 646    st_init_compute_functions(functions);
 647
 648    st_init_xformfb_functions(functions);
 649    st_init_syncobj_functions(functions);
 650
 651    st_init_vdpau_functions(functions);
 652
 653    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 654       functions->EmitStringMarker = st_emit_string_marker;
 655
 656    functions->Enable = st_Enable;
 657    functions->UpdateState = st_invalidate_state;
 658    functions->QueryMemoryInfo = st_query_memory_info;
 659 }