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 "cso_cache/cso_context.h"
  80
  81
  82 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  83
  84
  85 /**
  86  * Called via ctx->Driver.Enable()
  87  */
  88 static void st_Enable(struct gl_context * ctx, GLenum cap, GLboolean state)
  89 {
  90    struct st_context *st = st_context(ctx);
  91
  92    switch (cap) {
  93    case GL_DEBUG_OUTPUT:
  94    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
  95       st_update_debug_callback(st);
  96       break;
  97    default:
  98       break;
  99    }
 100 }
 101
 102
 103 /**
 104  * Called via ctx->Driver.QueryMemoryInfo()
 105  */
 106 static void
 107 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 108 {
 109    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 110    struct pipe_memory_info info;
 111
 112    assert(screen->query_memory_info);
 113    if (!screen->query_memory_info)
 114       return;
 115
 116    screen->query_memory_info(screen, &info);
 117
 118    out->total_device_memory = info.total_device_memory;
 119    out->avail_device_memory = info.avail_device_memory;
 120    out->total_staging_memory = info.total_staging_memory;
 121    out->avail_staging_memory = info.avail_staging_memory;
 122    out->device_memory_evicted = info.device_memory_evicted;
 123    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 124 }
 125
 126
 127 uint64_t
 128 st_get_active_states(struct gl_context *ctx)
 129 {
 130    struct st_vertex_program *vp =
 131       st_vertex_program(ctx->VertexProgram._Current);
 132    struct st_tessctrl_program *tcp =
 133       st_tessctrl_program(ctx->TessCtrlProgram._Current);
 134    struct st_tesseval_program *tep =
 135       st_tesseval_program(ctx->TessEvalProgram._Current);
 136    struct st_geometry_program *gp =
 137       st_geometry_program(ctx->GeometryProgram._Current);
 138    struct st_fragment_program *fp =
 139       st_fragment_program(ctx->FragmentProgram._Current);
 140    struct st_compute_program *cp =
 141       st_compute_program(ctx->ComputeProgram._Current);
 142    uint64_t active_shader_states = 0;
 143
 144    if (vp)
 145       active_shader_states |= vp->affected_states;
 146    if (tcp)
 147       active_shader_states |= tcp->affected_states;
 148    if (tep)
 149       active_shader_states |= tep->affected_states;
 150    if (gp)
 151       active_shader_states |= gp->affected_states;
 152    if (fp)
 153       active_shader_states |= fp->affected_states;
 154    if (cp)
 155       active_shader_states |= cp->affected_states;
 156
 157    /* Mark non-shader-resource shader states as "always active". */
 158    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 159 }
 160
 161
 162 /**
 163  * Called via ctx->Driver.UpdateState()
 164  */
 165 void st_invalidate_state(struct gl_context * ctx, GLbitfield new_state)
 166 {
 167    struct st_context *st = st_context(ctx);
 168
 169    if (new_state & _NEW_BUFFERS) {
 170       st->dirty |= ST_NEW_BLEND |
 171                    ST_NEW_DSA |
 172                    ST_NEW_FB_STATE |
 173                    ST_NEW_SAMPLE_MASK |
 174                    ST_NEW_SAMPLE_SHADING |
 175                    ST_NEW_FS_STATE |
 176                    ST_NEW_POLY_STIPPLE |
 177                    ST_NEW_VIEWPORT |
 178                    ST_NEW_RASTERIZER |
 179                    ST_NEW_SCISSOR |
 180                    ST_NEW_WINDOW_RECTANGLES;
 181    } else {
 182       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 183        * check them when _NEW_BUFFERS isn't set.
 184        */
 185       if (new_state & (_NEW_DEPTH |
 186                        _NEW_STENCIL))
 187          st->dirty |= ST_NEW_DSA;
 188
 189       if (new_state & _NEW_PROGRAM)
 190          st->dirty |= ST_NEW_RASTERIZER;
 191
 192       if (new_state & _NEW_SCISSOR)
 193          st->dirty |= ST_NEW_RASTERIZER |
 194                       ST_NEW_SCISSOR |
 195                       ST_NEW_WINDOW_RECTANGLES;
 196
 197       if (new_state & _NEW_FOG)
 198          st->dirty |= ST_NEW_FS_STATE;
 199
 200       if (new_state & _NEW_POLYGONSTIPPLE)
 201          st->dirty |= ST_NEW_POLY_STIPPLE;
 202
 203       if (new_state & _NEW_VIEWPORT)
 204          st->dirty |= ST_NEW_VIEWPORT;
 205
 206       if (new_state & _NEW_FRAG_CLAMP) {
 207          if (st->clamp_frag_color_in_shader)
 208             st->dirty |= ST_NEW_FS_STATE;
 209          else
 210             st->dirty |= ST_NEW_RASTERIZER;
 211       }
 212    }
 213
 214    if (new_state & _NEW_MULTISAMPLE) {
 215       st->dirty |= ST_NEW_BLEND |
 216                    ST_NEW_SAMPLE_MASK |
 217                    ST_NEW_SAMPLE_SHADING |
 218                    ST_NEW_RASTERIZER |
 219                    ST_NEW_FS_STATE;
 220    } else {
 221       /* These set a subset of flags set by _NEW_MULTISAMPLE, so we only
 222        * have to check them when _NEW_MULTISAMPLE isn't set.
 223        */
 224       if (new_state & (_NEW_LIGHT |
 225                        _NEW_LINE |
 226                        _NEW_POINT |
 227                        _NEW_POLYGON |
 228                        _NEW_TRANSFORM))
 229          st->dirty |= ST_NEW_RASTERIZER;
 230    }
 231
 232    if (new_state & (_NEW_PROJECTION |
 233                     _NEW_TRANSFORM) &&
 234        st_user_clip_planes_enabled(ctx))
 235       st->dirty |= ST_NEW_CLIP_STATE;
 236
 237    if (new_state & _NEW_COLOR)
 238       st->dirty |= ST_NEW_BLEND |
 239                    ST_NEW_DSA;
 240
 241    if (new_state & _NEW_PIXEL)
 242       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 243
 244    if (new_state & _NEW_CURRENT_ATTRIB)
 245       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 246
 247    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 248    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 249       st->dirty |= ST_NEW_VS_STATE;
 250
 251    /* Which shaders are dirty will be determined manually. */
 252    if (new_state & _NEW_PROGRAM) {
 253       st->gfx_shaders_may_be_dirty = true;
 254       st->compute_shader_may_be_dirty = true;
 255       /* This will mask out unused shader resources. */
 256       st->active_states = st_get_active_states(ctx);
 257    }
 258
 259    if (new_state & _NEW_TEXTURE) {
 260       st->dirty |= st->active_states &
 261                    (ST_NEW_SAMPLER_VIEWS |
 262                     ST_NEW_SAMPLERS |
 263                     ST_NEW_IMAGE_UNITS);
 264       if (ctx->FragmentProgram._Current &&
 265           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 266          st->dirty |= ST_NEW_FS_STATE;
 267       }
 268    }
 269
 270    if (new_state & _NEW_PROGRAM_CONSTANTS)
 271       st->dirty |= st->active_states & ST_NEW_CONSTANTS;
 272
 273    /* This is the only core Mesa module we depend upon.
 274     * No longer use swrast, swsetup, tnl.
 275     */
 276    _vbo_InvalidateState(ctx, new_state);
 277 }
 278
 279
 280 static void
 281 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 282 {
 283    uint shader, i;
 284
 285    st_destroy_atoms( st );
 286    st_destroy_draw( st );
 287    st_destroy_clear(st);
 288    st_destroy_bitmap(st);
 289    st_destroy_drawpix(st);
 290    st_destroy_drawtex(st);
 291    st_destroy_perfmon(st);
 292    st_destroy_pbo_helpers(st);
 293
 294    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 295       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 296          pipe_sampler_view_release(st->pipe,
 297                                    &st->state.sampler_views[shader][i]);
 298       }
 299    }
 300
 301    u_upload_destroy(st->uploader);
 302    if (st->indexbuf_uploader) {
 303       u_upload_destroy(st->indexbuf_uploader);
 304    }
 305    if (st->constbuf_uploader) {
 306       u_upload_destroy(st->constbuf_uploader);
 307    }
 308
 309    /* free glDrawPixels cache data */
 310    free(st->drawpix_cache.image);
 311    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 312
 313    /* free glReadPixels cache data */
 314    st_invalidate_readpix_cache(st);
 315
 316    cso_destroy_context(st->cso_context);
 317
 318    if (st->pipe && destroy_pipe)
 319       st->pipe->destroy(st->pipe);
 320
 321    free( st );
 322 }
 323
 324
 325 static struct st_context *
 326 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 327                 const struct st_config_options *options)
 328 {
 329    struct pipe_screen *screen = pipe->screen;
 330    uint i;
 331    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 332
 333    st->options = *options;
 334
 335    ctx->st = st;
 336
 337    st->ctx = ctx;
 338    st->pipe = pipe;
 339
 340    /* XXX: this is one-off, per-screen init: */
 341    st_debug_init();
 342
 343    /* state tracker needs the VBO module */
 344    _vbo_CreateContext(ctx);
 345
 346    st->dirty = ST_ALL_STATES_MASK;
 347
 348    /* Create upload manager for vertex data for glBitmap, glDrawPixels,
 349     * glClear, etc.
 350     */
 351    st->uploader = u_upload_create(pipe, 65536, PIPE_BIND_VERTEX_BUFFER,
 352                                   PIPE_USAGE_STREAM);
 353
 354    if (!screen->get_param(screen, PIPE_CAP_USER_INDEX_BUFFERS)) {
 355       st->indexbuf_uploader = u_upload_create(pipe, 128 * 1024,
 356                                               PIPE_BIND_INDEX_BUFFER,
 357                                               PIPE_USAGE_STREAM);
 358    }
 359
 360    if (!screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS))
 361       st->constbuf_uploader = u_upload_create(pipe, 128 * 1024,
 362                                               PIPE_BIND_CONSTANT_BUFFER,
 363                                               PIPE_USAGE_STREAM);
 364
 365    st->cso_context = cso_create_context(pipe);
 366
 367    st_init_atoms( st );
 368    st_init_clear(st);
 369    st_init_draw( st );
 370    st_init_pbo_helpers(st);
 371
 372    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 373    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 374       st->internal_target = PIPE_TEXTURE_2D;
 375    else
 376       st->internal_target = PIPE_TEXTURE_RECT;
 377
 378    /* Setup vertex element info for 'struct st_util_vertex'.
 379     */
 380    {
 381       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 382
 383       /* If this assertion ever fails all state tracker calls to
 384        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 385        * particular call would have to be moved to just before each
 386        * drawing call.
 387        */
 388       assert(slot == 0);
 389
 390       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 391
 392       memset(&st->util_velems, 0, sizeof(st->util_velems));
 393       st->util_velems[0].src_offset = 0;
 394       st->util_velems[0].vertex_buffer_index = slot;
 395       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 396       st->util_velems[1].src_offset = 3 * sizeof(float);
 397       st->util_velems[1].vertex_buffer_index = slot;
 398       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 399       st->util_velems[2].src_offset = 7 * sizeof(float);
 400       st->util_velems[2].vertex_buffer_index = slot;
 401       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 402    }
 403
 404    /* we want all vertex data to be placed in buffer objects */
 405    vbo_use_buffer_objects(ctx);
 406
 407
 408    /* make sure that no VBOs are left mapped when we're drawing. */
 409    vbo_always_unmap_buffers(ctx);
 410
 411    /* Need these flags:
 412     */
 413    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 414
 415    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 416
 417    st->has_stencil_export =
 418       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 419    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 420    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 421                                               PIPE_TEXTURE_2D, 0,
 422                                               PIPE_BIND_SAMPLER_VIEW);
 423    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 424                                               PIPE_TEXTURE_2D, 0,
 425                                               PIPE_BIND_SAMPLER_VIEW);
 426    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 427                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 428    st->force_persample_in_shader =
 429       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 430       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 431    st->has_shareable_shaders = screen->get_param(screen,
 432                                                  PIPE_CAP_SHAREABLE_SHADERS);
 433    st->needs_texcoord_semantic =
 434       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 435    st->apply_texture_swizzle_to_border_color =
 436       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 437          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 438           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 439    st->has_time_elapsed =
 440       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 441    st->has_half_float_packing =
 442       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 443    st->has_multi_draw_indirect =
 444       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 445
 446    /* GL limits and extensions */
 447    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 448    st_init_extensions(pipe->screen, &ctx->Const,
 449                       &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
 450
 451    if (st_have_perfmon(st)) {
 452       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 453    }
 454
 455    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 456    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 457       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 458          st->clamp_vert_color_in_shader = GL_TRUE;
 459       }
 460
 461       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 462          st->clamp_frag_color_in_shader = GL_TRUE;
 463       }
 464
 465       /* For drivers which cannot do color clamping, it's better to just
 466        * disable ARB_color_buffer_float in the core profile, because
 467        * the clamping is deprecated there anyway. */
 468       if (ctx->API == API_OPENGL_CORE &&
 469           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 470          st->clamp_vert_color_in_shader = GL_FALSE;
 471          st->clamp_frag_color_in_shader = GL_FALSE;
 472          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 473       }
 474    }
 475
 476    /* called after _mesa_create_context/_mesa_init_point, fix default user
 477     * settable max point size up
 478     */
 479    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 480                              ctx->Const.MaxPointSizeAA);
 481    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 482    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 483
 484    if (!ctx->Extensions.ARB_gpu_shader5) {
 485       for (i = 0; i < MESA_SHADER_STAGES; i++)
 486          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 487    }
 488
 489    /* Set which shader types can be compiled at link time. */
 490    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 491          st->has_shareable_shaders &&
 492          !st->clamp_vert_color_in_shader;
 493
 494    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 495          st->has_shareable_shaders &&
 496          !st->clamp_frag_color_in_shader &&
 497          !st->force_persample_in_shader;
 498
 499    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 500    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 501    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 502    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 503
 504    _mesa_compute_version(ctx);
 505
 506    if (ctx->Version == 0) {
 507       /* This can happen when a core profile was requested, but the driver
 508        * does not support some features of GL 3.1 or later.
 509        */
 510       st_destroy_context_priv(st, false);
 511       return NULL;
 512    }
 513
 514    _mesa_initialize_dispatch_tables(ctx);
 515    _mesa_initialize_vbo_vtxfmt(ctx);
 516
 517    return st;
 518 }
 519
 520 static void st_init_driver_flags(struct gl_driver_flags *f)
 521 {
 522    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 523    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 524    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 525    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 526    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 527    f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 528    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 529    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 530 }
 531
 532 struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
 533                                      const struct gl_config *visual,
 534                                      struct st_context *share,
 535                                      const struct st_config_options *options)
 536 {
 537    struct gl_context *ctx;
 538    struct gl_context *shareCtx = share ? share->ctx : NULL;
 539    struct dd_function_table funcs;
 540    struct st_context *st;
 541
 542    memset(&funcs, 0, sizeof(funcs));
 543    st_init_driver_functions(pipe->screen, &funcs);
 544
 545    ctx = calloc(1, sizeof(struct gl_context));
 546    if (!ctx)
 547       return NULL;
 548
 549    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 550       free(ctx);
 551       return NULL;
 552    }
 553
 554    st_init_driver_flags(&ctx->DriverFlags);
 555
 556    /* XXX: need a capability bit in gallium to query if the pipe
 557     * driver prefers DP4 or MUL/MAD for vertex transformation.
 558     */
 559    if (debug_get_option_mesa_mvp_dp4())
 560       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 561
 562    st = st_create_context_priv(ctx, pipe, options);
 563    if (!st) {
 564       _mesa_destroy_context(ctx);
 565    }
 566
 567    return st;
 568 }
 569
 570
 571 /**
 572  * Callback to release the sampler view attached to a texture object.
 573  * Called by _mesa_HashWalk().
 574  */
 575 static void
 576 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 577 {
 578    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 579    struct st_context *st = (struct st_context *) userData;
 580
 581    st_texture_release_sampler_view(st, st_texture_object(texObj));
 582 }
 583
 584 void st_destroy_context( struct st_context *st )
 585 {
 586    struct gl_context *ctx = st->ctx;
 587    GLuint i;
 588
 589    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 590
 591    st_reference_fragprog(st, &st->fp, NULL);
 592    st_reference_geomprog(st, &st->gp, NULL);
 593    st_reference_vertprog(st, &st->vp, NULL);
 594    st_reference_tesscprog(st, &st->tcp, NULL);
 595    st_reference_tesseprog(st, &st->tep, NULL);
 596    st_reference_compprog(st, &st->cp, NULL);
 597
 598    /* release framebuffer surfaces */
 599    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 600       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 601    }
 602    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 603    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 604    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 605
 606    _vbo_DestroyContext(ctx);
 607
 608    st_destroy_program_variants(st);
 609
 610    _mesa_free_context_data(ctx);
 611
 612    /* This will free the st_context too, so 'st' must not be accessed
 613     * afterwards. */
 614    st_destroy_context_priv(st, true);
 615    st = NULL;
 616
 617    free(ctx);
 618 }
 619
 620 static void
 621 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 622 {
 623    struct st_context *st = ctx->st;
 624    st->pipe->emit_string_marker(st->pipe, string, len);
 625 }
 626
 627 void st_init_driver_functions(struct pipe_screen *screen,
 628                               struct dd_function_table *functions)
 629 {
 630    _mesa_init_shader_object_functions(functions);
 631    _mesa_init_sampler_object_functions(functions);
 632
 633    st_init_blit_functions(functions);
 634    st_init_bufferobject_functions(screen, functions);
 635    st_init_clear_functions(functions);
 636    st_init_bitmap_functions(functions);
 637    st_init_copy_image_functions(functions);
 638    st_init_drawpixels_functions(functions);
 639    st_init_rasterpos_functions(functions);
 640
 641    st_init_drawtex_functions(functions);
 642
 643    st_init_eglimage_functions(functions);
 644
 645    st_init_fbo_functions(functions);
 646    st_init_feedback_functions(functions);
 647    st_init_msaa_functions(functions);
 648    st_init_perfmon_functions(functions);
 649    st_init_program_functions(functions);
 650    st_init_query_functions(functions);
 651    st_init_cond_render_functions(functions);
 652    st_init_readpixels_functions(functions);
 653    st_init_texture_functions(functions);
 654    st_init_texture_barrier_functions(functions);
 655    st_init_flush_functions(screen, functions);
 656    st_init_string_functions(functions);
 657    st_init_viewport_functions(functions);
 658    st_init_compute_functions(functions);
 659
 660    st_init_xformfb_functions(functions);
 661    st_init_syncobj_functions(functions);
 662
 663    st_init_vdpau_functions(functions);
 664
 665    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 666       functions->EmitStringMarker = st_emit_string_marker;
 667
 668    functions->Enable = st_Enable;
 669    functions->UpdateState = st_invalidate_state;
 670    functions->QueryMemoryInfo = st_query_memory_info;
 671 }