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_context.h"
  42 #include "st_debug.h"
  43 #include "st_cb_bitmap.h"
  44 #include "st_cb_blit.h"
  45 #include "st_cb_bufferobjects.h"
  46 #include "st_cb_clear.h"
  47 #include "st_cb_compute.h"
  48 #include "st_cb_condrender.h"
  49 #include "st_cb_copyimage.h"
  50 #include "st_cb_drawpixels.h"
  51 #include "st_cb_rasterpos.h"
  52 #include "st_cb_drawtex.h"
  53 #include "st_cb_eglimage.h"
  54 #include "st_cb_fbo.h"
  55 #include "st_cb_feedback.h"
  56 #include "st_cb_msaa.h"
  57 #include "st_cb_perfmon.h"
  58 #include "st_cb_program.h"
  59 #include "st_cb_queryobj.h"
  60 #include "st_cb_readpixels.h"
  61 #include "st_cb_texture.h"
  62 #include "st_cb_xformfb.h"
  63 #include "st_cb_flush.h"
  64 #include "st_cb_syncobj.h"
  65 #include "st_cb_strings.h"
  66 #include "st_cb_texturebarrier.h"
  67 #include "st_cb_viewport.h"
  68 #include "st_atom.h"
  69 #include "st_draw.h"
  70 #include "st_extensions.h"
  71 #include "st_gen_mipmap.h"
  72 #include "st_pbo.h"
  73 #include "st_program.h"
  74 #include "st_sampler_view.h"
  75 #include "st_vdpau.h"
  76 #include "st_texture.h"
  77 #include "pipe/p_context.h"
  78 #include "util/u_inlines.h"
  79 #include "util/u_upload_mgr.h"
  80 #include "util/u_vbuf.h"
  81 #include "cso_cache/cso_context.h"
  82
  83
  84 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  85
  86
  87 /**
  88  * Called via ctx->Driver.Enable()
  89  */
  90 static void st_Enable(struct gl_context * ctx, GLenum cap, GLboolean state)
  91 {
  92    struct st_context *st = st_context(ctx);
  93
  94    switch (cap) {
  95    case GL_DEBUG_OUTPUT:
  96    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
  97       st_update_debug_callback(st);
  98       break;
  99    default:
 100       break;
 101    }
 102 }
 103
 104
 105 /**
 106  * Called via ctx->Driver.QueryMemoryInfo()
 107  */
 108 static void
 109 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 110 {
 111    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 112    struct pipe_memory_info info;
 113
 114    assert(screen->query_memory_info);
 115    if (!screen->query_memory_info)
 116       return;
 117
 118    screen->query_memory_info(screen, &info);
 119
 120    out->total_device_memory = info.total_device_memory;
 121    out->avail_device_memory = info.avail_device_memory;
 122    out->total_staging_memory = info.total_staging_memory;
 123    out->avail_staging_memory = info.avail_staging_memory;
 124    out->device_memory_evicted = info.device_memory_evicted;
 125    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 126 }
 127
 128
 129 uint64_t
 130 st_get_active_states(struct gl_context *ctx)
 131 {
 132    struct st_vertex_program *vp =
 133       st_vertex_program(ctx->VertexProgram._Current);
 134    struct st_common_program *tcp =
 135       st_common_program(ctx->TessCtrlProgram._Current);
 136    struct st_common_program *tep =
 137       st_common_program(ctx->TessEvalProgram._Current);
 138    struct st_common_program *gp =
 139       st_common_program(ctx->GeometryProgram._Current);
 140    struct st_fragment_program *fp =
 141       st_fragment_program(ctx->FragmentProgram._Current);
 142    struct st_compute_program *cp =
 143       st_compute_program(ctx->ComputeProgram._Current);
 144    uint64_t active_shader_states = 0;
 145
 146    if (vp)
 147       active_shader_states |= vp->affected_states;
 148    if (tcp)
 149       active_shader_states |= tcp->affected_states;
 150    if (tep)
 151       active_shader_states |= tep->affected_states;
 152    if (gp)
 153       active_shader_states |= gp->affected_states;
 154    if (fp)
 155       active_shader_states |= fp->affected_states;
 156    if (cp)
 157       active_shader_states |= cp->affected_states;
 158
 159    /* Mark non-shader-resource shader states as "always active". */
 160    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 161 }
 162
 163
 164 /**
 165  * Called via ctx->Driver.UpdateState()
 166  */
 167 void st_invalidate_state(struct gl_context * ctx, GLbitfield new_state)
 168 {
 169    struct st_context *st = st_context(ctx);
 170
 171    if (new_state & _NEW_BUFFERS) {
 172       st->dirty |= ST_NEW_BLEND |
 173                    ST_NEW_DSA |
 174                    ST_NEW_FB_STATE |
 175                    ST_NEW_SAMPLE_MASK |
 176                    ST_NEW_SAMPLE_SHADING |
 177                    ST_NEW_FS_STATE |
 178                    ST_NEW_POLY_STIPPLE |
 179                    ST_NEW_VIEWPORT |
 180                    ST_NEW_RASTERIZER |
 181                    ST_NEW_SCISSOR |
 182                    ST_NEW_WINDOW_RECTANGLES;
 183    } else {
 184       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 185        * check them when _NEW_BUFFERS isn't set.
 186        */
 187       if (new_state & (_NEW_DEPTH |
 188                        _NEW_STENCIL))
 189          st->dirty |= ST_NEW_DSA;
 190
 191       if (new_state & _NEW_PROGRAM)
 192          st->dirty |= ST_NEW_RASTERIZER;
 193
 194       if (new_state & _NEW_SCISSOR)
 195          st->dirty |= ST_NEW_RASTERIZER |
 196                       ST_NEW_SCISSOR |
 197                       ST_NEW_WINDOW_RECTANGLES;
 198
 199       if (new_state & _NEW_FOG)
 200          st->dirty |= ST_NEW_FS_STATE;
 201
 202       if (new_state & _NEW_POLYGONSTIPPLE)
 203          st->dirty |= ST_NEW_POLY_STIPPLE;
 204
 205       if (new_state & _NEW_VIEWPORT)
 206          st->dirty |= ST_NEW_VIEWPORT;
 207
 208       if (new_state & _NEW_FRAG_CLAMP) {
 209          if (st->clamp_frag_color_in_shader)
 210             st->dirty |= ST_NEW_FS_STATE;
 211          else
 212             st->dirty |= ST_NEW_RASTERIZER;
 213       }
 214    }
 215
 216    if (new_state & _NEW_MULTISAMPLE) {
 217       st->dirty |= ST_NEW_BLEND |
 218                    ST_NEW_SAMPLE_MASK |
 219                    ST_NEW_SAMPLE_SHADING |
 220                    ST_NEW_RASTERIZER |
 221                    ST_NEW_FS_STATE;
 222    } else {
 223       /* These set a subset of flags set by _NEW_MULTISAMPLE, so we only
 224        * have to check them when _NEW_MULTISAMPLE isn't set.
 225        */
 226       if (new_state & (_NEW_LIGHT |
 227                        _NEW_LINE |
 228                        _NEW_POINT |
 229                        _NEW_POLYGON |
 230                        _NEW_TRANSFORM))
 231          st->dirty |= ST_NEW_RASTERIZER;
 232    }
 233
 234    if (new_state & (_NEW_PROJECTION |
 235                     _NEW_TRANSFORM) &&
 236        st_user_clip_planes_enabled(ctx))
 237       st->dirty |= ST_NEW_CLIP_STATE;
 238
 239    if (new_state & _NEW_COLOR)
 240       st->dirty |= ST_NEW_BLEND |
 241                    ST_NEW_DSA;
 242
 243    if (new_state & _NEW_PIXEL)
 244       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 245
 246    if (new_state & _NEW_CURRENT_ATTRIB)
 247       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 248
 249    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 250    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 251       st->dirty |= ST_NEW_VS_STATE;
 252
 253    /* Which shaders are dirty will be determined manually. */
 254    if (new_state & _NEW_PROGRAM) {
 255       st->gfx_shaders_may_be_dirty = true;
 256       st->compute_shader_may_be_dirty = true;
 257       /* This will mask out unused shader resources. */
 258       st->active_states = st_get_active_states(ctx);
 259    }
 260
 261    if (new_state & _NEW_TEXTURE_OBJECT) {
 262       st->dirty |= st->active_states &
 263                    (ST_NEW_SAMPLER_VIEWS |
 264                     ST_NEW_SAMPLERS |
 265                     ST_NEW_IMAGE_UNITS);
 266       if (ctx->FragmentProgram._Current &&
 267           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 268          st->dirty |= ST_NEW_FS_STATE;
 269       }
 270    }
 271
 272    if (new_state & _NEW_PROGRAM_CONSTANTS)
 273       st->dirty |= st->active_states & ST_NEW_CONSTANTS;
 274
 275    /* This is the only core Mesa module we depend upon.
 276     * No longer use swrast, swsetup, tnl.
 277     */
 278    _vbo_InvalidateState(ctx, new_state);
 279 }
 280
 281
 282 static void
 283 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 284 {
 285    uint shader, i;
 286
 287    st_destroy_atoms( st );
 288    st_destroy_draw( st );
 289    st_destroy_clear(st);
 290    st_destroy_bitmap(st);
 291    st_destroy_drawpix(st);
 292    st_destroy_drawtex(st);
 293    st_destroy_perfmon(st);
 294    st_destroy_pbo_helpers(st);
 295
 296    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 297       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 298          pipe_sampler_view_release(st->pipe,
 299                                    &st->state.sampler_views[shader][i]);
 300       }
 301    }
 302
 303    /* free glDrawPixels cache data */
 304    free(st->drawpix_cache.image);
 305    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 306
 307    /* free glReadPixels cache data */
 308    st_invalidate_readpix_cache(st);
 309
 310    cso_destroy_context(st->cso_context);
 311
 312    if (st->pipe && destroy_pipe)
 313       st->pipe->destroy(st->pipe);
 314
 315    free( st );
 316 }
 317
 318
 319 static struct st_context *
 320 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 321                 const struct st_config_options *options)
 322 {
 323    struct pipe_screen *screen = pipe->screen;
 324    uint i;
 325    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 326
 327    st->options = *options;
 328
 329    ctx->st = st;
 330
 331    st->ctx = ctx;
 332    st->pipe = pipe;
 333
 334    /* state tracker needs the VBO module */
 335    _vbo_CreateContext(ctx);
 336
 337    st->dirty = ST_ALL_STATES_MASK;
 338
 339    st->has_user_constbuf =
 340       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 341
 342    /* Drivers still have to upload zero-stride vertex attribs manually
 343     * with the GL core profile, but they don't have to deal with any complex
 344     * user vertex buffer uploads.
 345     */
 346    unsigned vbuf_flags =
 347       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 348    st->cso_context = cso_create_context(pipe, vbuf_flags);
 349
 350    st_init_atoms( st );
 351    st_init_clear(st);
 352    st_init_draw( st );
 353    st_init_pbo_helpers(st);
 354
 355    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 356    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 357       st->internal_target = PIPE_TEXTURE_2D;
 358    else
 359       st->internal_target = PIPE_TEXTURE_RECT;
 360
 361    /* Setup vertex element info for 'struct st_util_vertex'.
 362     */
 363    {
 364       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 365
 366       /* If this assertion ever fails all state tracker calls to
 367        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 368        * particular call would have to be moved to just before each
 369        * drawing call.
 370        */
 371       assert(slot == 0);
 372
 373       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 374
 375       memset(&st->util_velems, 0, sizeof(st->util_velems));
 376       st->util_velems[0].src_offset = 0;
 377       st->util_velems[0].vertex_buffer_index = slot;
 378       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 379       st->util_velems[1].src_offset = 3 * sizeof(float);
 380       st->util_velems[1].vertex_buffer_index = slot;
 381       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 382       st->util_velems[2].src_offset = 7 * sizeof(float);
 383       st->util_velems[2].vertex_buffer_index = slot;
 384       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 385    }
 386
 387    /* we want all vertex data to be placed in buffer objects */
 388    vbo_use_buffer_objects(ctx);
 389
 390
 391    /* make sure that no VBOs are left mapped when we're drawing. */
 392    vbo_always_unmap_buffers(ctx);
 393
 394    /* Need these flags:
 395     */
 396    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 397
 398    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 399
 400    st->has_stencil_export =
 401       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 402    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 403    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 404                                               PIPE_TEXTURE_2D, 0,
 405                                               PIPE_BIND_SAMPLER_VIEW);
 406    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 407                                               PIPE_TEXTURE_2D, 0,
 408                                               PIPE_BIND_SAMPLER_VIEW);
 409    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 410                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 411    st->force_persample_in_shader =
 412       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 413       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 414    st->has_shareable_shaders = screen->get_param(screen,
 415                                                  PIPE_CAP_SHAREABLE_SHADERS);
 416    st->needs_texcoord_semantic =
 417       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 418    st->apply_texture_swizzle_to_border_color =
 419       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 420          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 421           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 422    st->has_time_elapsed =
 423       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 424    st->has_half_float_packing =
 425       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 426    st->has_multi_draw_indirect =
 427       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 428
 429    /* GL limits and extensions */
 430    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 431    st_init_extensions(pipe->screen, &ctx->Const,
 432                       &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
 433
 434    if (st_have_perfmon(st)) {
 435       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 436    }
 437
 438    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 439    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 440       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 441          st->clamp_vert_color_in_shader = GL_TRUE;
 442       }
 443
 444       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 445          st->clamp_frag_color_in_shader = GL_TRUE;
 446       }
 447
 448       /* For drivers which cannot do color clamping, it's better to just
 449        * disable ARB_color_buffer_float in the core profile, because
 450        * the clamping is deprecated there anyway. */
 451       if (ctx->API == API_OPENGL_CORE &&
 452           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 453          st->clamp_vert_color_in_shader = GL_FALSE;
 454          st->clamp_frag_color_in_shader = GL_FALSE;
 455          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 456       }
 457    }
 458
 459    /* called after _mesa_create_context/_mesa_init_point, fix default user
 460     * settable max point size up
 461     */
 462    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 463                              ctx->Const.MaxPointSizeAA);
 464    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 465    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 466
 467    if (!ctx->Extensions.ARB_gpu_shader5) {
 468       for (i = 0; i < MESA_SHADER_STAGES; i++)
 469          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 470    }
 471
 472    /* Set which shader types can be compiled at link time. */
 473    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 474          st->has_shareable_shaders &&
 475          !st->clamp_vert_color_in_shader;
 476
 477    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 478          st->has_shareable_shaders &&
 479          !st->clamp_frag_color_in_shader &&
 480          !st->force_persample_in_shader;
 481
 482    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 483    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 484    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 485    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 486
 487    st->bitmap.cache.empty = true;
 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    st_debug_init();
 540
 541    if (pipe->screen->get_disk_shader_cache &&
 542        !(ST_DEBUG & DEBUG_TGSI))
 543       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 544
 545    st_init_driver_flags(&ctx->DriverFlags);
 546
 547    /* XXX: need a capability bit in gallium to query if the pipe
 548     * driver prefers DP4 or MUL/MAD for vertex transformation.
 549     */
 550    if (debug_get_option_mesa_mvp_dp4())
 551       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 552
 553    st = st_create_context_priv(ctx, pipe, options);
 554    if (!st) {
 555       _mesa_destroy_context(ctx);
 556    }
 557
 558    return st;
 559 }
 560
 561
 562 /**
 563  * Callback to release the sampler view attached to a texture object.
 564  * Called by _mesa_HashWalk().
 565  */
 566 static void
 567 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 568 {
 569    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 570    struct st_context *st = (struct st_context *) userData;
 571
 572    st_texture_release_sampler_view(st, st_texture_object(texObj));
 573 }
 574
 575 void st_destroy_context( struct st_context *st )
 576 {
 577    struct gl_context *ctx = st->ctx;
 578    GLuint i;
 579
 580    /* This must be called first so that glthread has a chance to finish */
 581    _mesa_glthread_destroy(ctx);
 582
 583    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 584
 585    st_reference_fragprog(st, &st->fp, NULL);
 586    st_reference_prog(st, &st->gp, NULL);
 587    st_reference_vertprog(st, &st->vp, NULL);
 588    st_reference_prog(st, &st->tcp, NULL);
 589    st_reference_prog(st, &st->tep, NULL);
 590    st_reference_compprog(st, &st->cp, NULL);
 591
 592    /* release framebuffer surfaces */
 593    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 594       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 595    }
 596    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 597    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 598    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 599
 600    _vbo_DestroyContext(ctx);
 601
 602    st_destroy_program_variants(st);
 603
 604    _mesa_free_context_data(ctx);
 605
 606    /* This will free the st_context too, so 'st' must not be accessed
 607     * afterwards. */
 608    st_destroy_context_priv(st, true);
 609    st = NULL;
 610
 611    free(ctx);
 612 }
 613
 614 static void
 615 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 616 {
 617    struct st_context *st = ctx->st;
 618    st->pipe->emit_string_marker(st->pipe, string, len);
 619 }
 620
 621 static void
 622 st_set_background_context(struct gl_context *ctx)
 623 {
 624    struct st_context *st = ctx->st;
 625    struct st_manager *smapi =
 626       (struct st_manager*)st->iface.st_context_private;
 627
 628    assert(smapi->set_background_context);
 629    smapi->set_background_context(&st->iface);
 630 }
 631
 632 void st_init_driver_functions(struct pipe_screen *screen,
 633                               struct dd_function_table *functions)
 634 {
 635    _mesa_init_shader_object_functions(functions);
 636    _mesa_init_sampler_object_functions(functions);
 637
 638    st_init_blit_functions(functions);
 639    st_init_bufferobject_functions(screen, functions);
 640    st_init_clear_functions(functions);
 641    st_init_bitmap_functions(functions);
 642    st_init_copy_image_functions(functions);
 643    st_init_drawpixels_functions(functions);
 644    st_init_rasterpos_functions(functions);
 645
 646    st_init_drawtex_functions(functions);
 647
 648    st_init_eglimage_functions(functions);
 649
 650    st_init_fbo_functions(functions);
 651    st_init_feedback_functions(functions);
 652    st_init_msaa_functions(functions);
 653    st_init_perfmon_functions(functions);
 654    st_init_program_functions(functions);
 655    st_init_query_functions(functions);
 656    st_init_cond_render_functions(functions);
 657    st_init_readpixels_functions(functions);
 658    st_init_texture_functions(functions);
 659    st_init_texture_barrier_functions(functions);
 660    st_init_flush_functions(screen, functions);
 661    st_init_string_functions(functions);
 662    st_init_viewport_functions(functions);
 663    st_init_compute_functions(functions);
 664
 665    st_init_xformfb_functions(functions);
 666    st_init_syncobj_functions(functions);
 667
 668    st_init_vdpau_functions(functions);
 669
 670    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 671       functions->EmitStringMarker = st_emit_string_marker;
 672
 673    functions->Enable = st_Enable;
 674    functions->UpdateState = st_invalidate_state;
 675    functions->QueryMemoryInfo = st_query_memory_info;
 676    functions->SetBackgroundContext = st_set_background_context;
 677 }