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 void
 165 st_invalidate_buffers(struct st_context *st)
 166 {
 167    st->dirty |= ST_NEW_BLEND |
 168                 ST_NEW_DSA |
 169                 ST_NEW_FB_STATE |
 170                 ST_NEW_SAMPLE_MASK |
 171                 ST_NEW_SAMPLE_SHADING |
 172                 ST_NEW_FS_STATE |
 173                 ST_NEW_POLY_STIPPLE |
 174                 ST_NEW_VIEWPORT |
 175                 ST_NEW_RASTERIZER |
 176                 ST_NEW_SCISSOR |
 177                 ST_NEW_WINDOW_RECTANGLES;
 178 }
 179
 180
 181 /**
 182  * Called via ctx->Driver.UpdateState()
 183  */
 184 static void
 185 st_invalidate_state(struct gl_context * ctx)
 186 {
 187    GLbitfield new_state = ctx->NewState;
 188    struct st_context *st = st_context(ctx);
 189
 190    if (new_state & _NEW_BUFFERS) {
 191       st_invalidate_buffers(st);
 192    } else {
 193       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 194        * check them when _NEW_BUFFERS isn't set.
 195        */
 196       if (new_state & _NEW_PROGRAM)
 197          st->dirty |= ST_NEW_RASTERIZER;
 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_FRAG_CLAMP) {
 206          if (st->clamp_frag_color_in_shader)
 207             st->dirty |= ST_NEW_FS_STATE;
 208          else
 209             st->dirty |= ST_NEW_RASTERIZER;
 210       }
 211    }
 212
 213    if (new_state & (_NEW_LIGHT |
 214                     _NEW_LINE |
 215                     _NEW_POINT |
 216                     _NEW_POLYGON |
 217                     _NEW_TRANSFORM))
 218       st->dirty |= ST_NEW_RASTERIZER;
 219
 220    if (new_state & (_NEW_PROJECTION |
 221                     _NEW_TRANSFORM) &&
 222        st_user_clip_planes_enabled(ctx))
 223       st->dirty |= ST_NEW_CLIP_STATE;
 224
 225    if (new_state & _NEW_PIXEL)
 226       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 227
 228    if (new_state & _NEW_CURRENT_ATTRIB)
 229       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 230
 231    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 232    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 233       st->dirty |= ST_NEW_VS_STATE;
 234
 235    /* Which shaders are dirty will be determined manually. */
 236    if (new_state & _NEW_PROGRAM) {
 237       st->gfx_shaders_may_be_dirty = true;
 238       st->compute_shader_may_be_dirty = true;
 239       /* This will mask out unused shader resources. */
 240       st->active_states = st_get_active_states(ctx);
 241    }
 242
 243    if (new_state & _NEW_TEXTURE_OBJECT) {
 244       st->dirty |= st->active_states &
 245                    (ST_NEW_SAMPLER_VIEWS |
 246                     ST_NEW_SAMPLERS |
 247                     ST_NEW_IMAGE_UNITS);
 248       if (ctx->FragmentProgram._Current &&
 249           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 250          st->dirty |= ST_NEW_FS_STATE;
 251       }
 252    }
 253
 254    if (new_state & _NEW_PROGRAM_CONSTANTS)
 255       st->dirty |= st->active_states & ST_NEW_CONSTANTS;
 256 }
 257
 258
 259 static void
 260 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 261 {
 262    uint shader, i;
 263
 264    st_destroy_atoms( st );
 265    st_destroy_draw( st );
 266    st_destroy_clear(st);
 267    st_destroy_bitmap(st);
 268    st_destroy_drawpix(st);
 269    st_destroy_drawtex(st);
 270    st_destroy_perfmon(st);
 271    st_destroy_pbo_helpers(st);
 272    st_destroy_bound_texture_handles(st);
 273    st_destroy_bound_image_handles(st);
 274
 275    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 276       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 277          pipe_sampler_view_release(st->pipe,
 278                                    &st->state.sampler_views[shader][i]);
 279       }
 280    }
 281
 282    /* free glDrawPixels cache data */
 283    free(st->drawpix_cache.image);
 284    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 285
 286    /* free glReadPixels cache data */
 287    st_invalidate_readpix_cache(st);
 288
 289    cso_destroy_context(st->cso_context);
 290
 291    if (st->pipe && destroy_pipe)
 292       st->pipe->destroy(st->pipe);
 293
 294    free( st );
 295 }
 296
 297 static void st_init_driver_flags(struct st_context *st);
 298
 299 static struct st_context *
 300 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 301                 const struct st_config_options *options)
 302 {
 303    struct pipe_screen *screen = pipe->screen;
 304    uint i;
 305    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 306
 307    st->options = *options;
 308
 309    ctx->st = st;
 310
 311    st->ctx = ctx;
 312    st->pipe = pipe;
 313
 314    /* state tracker needs the VBO module */
 315    _vbo_CreateContext(ctx);
 316
 317    st->dirty = ST_ALL_STATES_MASK;
 318
 319    st->has_user_constbuf =
 320       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 321    st->can_bind_const_buffer_as_vertex =
 322       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 323
 324    /* Drivers still have to upload zero-stride vertex attribs manually
 325     * with the GL core profile, but they don't have to deal with any complex
 326     * user vertex buffer uploads.
 327     */
 328    unsigned vbuf_flags =
 329       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 330    st->cso_context = cso_create_context(pipe, vbuf_flags);
 331
 332    st_init_atoms( st );
 333    st_init_clear(st);
 334    st_init_draw( st );
 335    st_init_pbo_helpers(st);
 336
 337    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 338    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 339       st->internal_target = PIPE_TEXTURE_2D;
 340    else
 341       st->internal_target = PIPE_TEXTURE_RECT;
 342
 343    /* Setup vertex element info for 'struct st_util_vertex'.
 344     */
 345    {
 346       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 347
 348       /* If this assertion ever fails all state tracker calls to
 349        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 350        * particular call would have to be moved to just before each
 351        * drawing call.
 352        */
 353       assert(slot == 0);
 354
 355       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 356
 357       memset(&st->util_velems, 0, sizeof(st->util_velems));
 358       st->util_velems[0].src_offset = 0;
 359       st->util_velems[0].vertex_buffer_index = slot;
 360       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 361       st->util_velems[1].src_offset = 3 * sizeof(float);
 362       st->util_velems[1].vertex_buffer_index = slot;
 363       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 364       st->util_velems[2].src_offset = 7 * sizeof(float);
 365       st->util_velems[2].vertex_buffer_index = slot;
 366       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 367    }
 368
 369    /* we want all vertex data to be placed in buffer objects */
 370    vbo_use_buffer_objects(ctx);
 371
 372
 373    /* make sure that no VBOs are left mapped when we're drawing. */
 374    vbo_always_unmap_buffers(ctx);
 375
 376    /* Need these flags:
 377     */
 378    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 379
 380    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 381
 382    st->has_stencil_export =
 383       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 384    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 385    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 386                                               PIPE_TEXTURE_2D, 0,
 387                                               PIPE_BIND_SAMPLER_VIEW);
 388    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 389                                               PIPE_TEXTURE_2D, 0,
 390                                               PIPE_BIND_SAMPLER_VIEW);
 391    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 392                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 393    st->force_persample_in_shader =
 394       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 395       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 396    st->has_shareable_shaders = screen->get_param(screen,
 397                                                  PIPE_CAP_SHAREABLE_SHADERS);
 398    st->needs_texcoord_semantic =
 399       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 400    st->apply_texture_swizzle_to_border_color =
 401       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 402          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 403           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 404    st->has_time_elapsed =
 405       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 406    st->has_half_float_packing =
 407       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 408    st->has_multi_draw_indirect =
 409       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 410
 411    /* GL limits and extensions */
 412    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 413    st_init_extensions(pipe->screen, &ctx->Const,
 414                       &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
 415
 416    if (st_have_perfmon(st)) {
 417       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 418    }
 419
 420    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 421    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 422       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 423          st->clamp_vert_color_in_shader = GL_TRUE;
 424       }
 425
 426       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 427          st->clamp_frag_color_in_shader = GL_TRUE;
 428       }
 429
 430       /* For drivers which cannot do color clamping, it's better to just
 431        * disable ARB_color_buffer_float in the core profile, because
 432        * the clamping is deprecated there anyway. */
 433       if (ctx->API == API_OPENGL_CORE &&
 434           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 435          st->clamp_vert_color_in_shader = GL_FALSE;
 436          st->clamp_frag_color_in_shader = GL_FALSE;
 437          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 438       }
 439    }
 440
 441    /* called after _mesa_create_context/_mesa_init_point, fix default user
 442     * settable max point size up
 443     */
 444    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 445                              ctx->Const.MaxPointSizeAA);
 446    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 447    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 448
 449    if (!ctx->Extensions.ARB_gpu_shader5) {
 450       for (i = 0; i < MESA_SHADER_STAGES; i++)
 451          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 452    }
 453
 454    /* Set which shader types can be compiled at link time. */
 455    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 456          st->has_shareable_shaders &&
 457          !st->clamp_vert_color_in_shader;
 458
 459    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 460          st->has_shareable_shaders &&
 461          !st->clamp_frag_color_in_shader &&
 462          !st->force_persample_in_shader;
 463
 464    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 465    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 466    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 467    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 468
 469    st->bitmap.cache.empty = true;
 470
 471    _mesa_compute_version(ctx);
 472
 473    if (ctx->Version == 0) {
 474       /* This can happen when a core profile was requested, but the driver
 475        * does not support some features of GL 3.1 or later.
 476        */
 477       st_destroy_context_priv(st, false);
 478       return NULL;
 479    }
 480
 481    _mesa_initialize_dispatch_tables(ctx);
 482    _mesa_initialize_vbo_vtxfmt(ctx);
 483    st_init_driver_flags(st);
 484
 485    return st;
 486 }
 487
 488 static void st_init_driver_flags(struct st_context *st)
 489 {
 490    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 491
 492    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 493    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 494    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 495    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 496    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 497    f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 498    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 499    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 500    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 501    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 502    f->NewScissorRect = ST_NEW_SCISSOR;
 503    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 504    f->NewAlphaTest = ST_NEW_DSA;
 505    f->NewBlend = ST_NEW_BLEND;
 506    f->NewBlendColor = ST_NEW_BLEND; /* TODO: add an atom for blend color */
 507    f->NewColorMask = ST_NEW_BLEND;
 508    f->NewDepth = ST_NEW_DSA;
 509    f->NewLogicOp = ST_NEW_BLEND;
 510    f->NewStencil = ST_NEW_DSA;
 511    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 512                              ST_NEW_SAMPLE_MASK | ST_NEW_SAMPLE_SHADING;
 513    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 514    f->NewSampleMask = ST_NEW_SAMPLE_MASK;
 515    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 516
 517    /* This depends on what the gallium driver wants. */
 518    if (st->force_persample_in_shader) {
 519       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 520       f->NewSampleShading |= ST_NEW_FS_STATE;
 521    } else {
 522       f->NewSampleShading |= ST_NEW_RASTERIZER;
 523    }
 524
 525    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 526    f->NewViewport = ST_NEW_VIEWPORT;
 527 }
 528
 529 struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
 530                                      const struct gl_config *visual,
 531                                      struct st_context *share,
 532                                      const struct st_config_options *options)
 533 {
 534    struct gl_context *ctx;
 535    struct gl_context *shareCtx = share ? share->ctx : NULL;
 536    struct dd_function_table funcs;
 537    struct st_context *st;
 538
 539    memset(&funcs, 0, sizeof(funcs));
 540    st_init_driver_functions(pipe->screen, &funcs);
 541
 542    ctx = calloc(1, sizeof(struct gl_context));
 543    if (!ctx)
 544       return NULL;
 545
 546    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 547       free(ctx);
 548       return NULL;
 549    }
 550
 551    st_debug_init();
 552
 553    if (pipe->screen->get_disk_shader_cache &&
 554        !(ST_DEBUG & DEBUG_TGSI))
 555       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 556
 557    /* XXX: need a capability bit in gallium to query if the pipe
 558     * driver prefers DP4 or MUL/MAD for vertex transformation.
 559     */
 560    if (debug_get_option_mesa_mvp_dp4())
 561       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 562
 563    st = st_create_context_priv(ctx, pipe, options);
 564    if (!st) {
 565       _mesa_destroy_context(ctx);
 566    }
 567
 568    return st;
 569 }
 570
 571
 572 /**
 573  * Callback to release the sampler view attached to a texture object.
 574  * Called by _mesa_HashWalk().
 575  */
 576 static void
 577 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 578 {
 579    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 580    struct st_context *st = (struct st_context *) userData;
 581
 582    st_texture_release_sampler_view(st, st_texture_object(texObj));
 583 }
 584
 585 void st_destroy_context( struct st_context *st )
 586 {
 587    struct gl_context *ctx = st->ctx;
 588
 589    /* This must be called first so that glthread has a chance to finish */
 590    _mesa_glthread_destroy(ctx);
 591
 592    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 593
 594    st_reference_fragprog(st, &st->fp, NULL);
 595    st_reference_prog(st, &st->gp, NULL);
 596    st_reference_vertprog(st, &st->vp, NULL);
 597    st_reference_prog(st, &st->tcp, NULL);
 598    st_reference_prog(st, &st->tep, NULL);
 599    st_reference_compprog(st, &st->cp, NULL);
 600
 601    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 602    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 603
 604    _vbo_DestroyContext(ctx);
 605
 606    st_destroy_program_variants(st);
 607
 608    _mesa_free_context_data(ctx);
 609
 610    /* This will free the st_context too, so 'st' must not be accessed
 611     * afterwards. */
 612    st_destroy_context_priv(st, true);
 613    st = NULL;
 614
 615    free(ctx);
 616 }
 617
 618 static void
 619 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 620 {
 621    struct st_context *st = ctx->st;
 622    st->pipe->emit_string_marker(st->pipe, string, len);
 623 }
 624
 625 static void
 626 st_set_background_context(struct gl_context *ctx)
 627 {
 628    struct st_context *st = ctx->st;
 629    struct st_manager *smapi =
 630       (struct st_manager*)st->iface.st_context_private;
 631
 632    assert(smapi->set_background_context);
 633    smapi->set_background_context(&st->iface);
 634 }
 635
 636 void st_init_driver_functions(struct pipe_screen *screen,
 637                               struct dd_function_table *functions)
 638 {
 639    _mesa_init_shader_object_functions(functions);
 640    _mesa_init_sampler_object_functions(functions);
 641
 642    st_init_blit_functions(functions);
 643    st_init_bufferobject_functions(screen, functions);
 644    st_init_clear_functions(functions);
 645    st_init_bitmap_functions(functions);
 646    st_init_copy_image_functions(functions);
 647    st_init_drawpixels_functions(functions);
 648    st_init_rasterpos_functions(functions);
 649
 650    st_init_drawtex_functions(functions);
 651
 652    st_init_eglimage_functions(functions);
 653
 654    st_init_fbo_functions(functions);
 655    st_init_feedback_functions(functions);
 656    st_init_msaa_functions(functions);
 657    st_init_perfmon_functions(functions);
 658    st_init_program_functions(functions);
 659    st_init_query_functions(functions);
 660    st_init_cond_render_functions(functions);
 661    st_init_readpixels_functions(functions);
 662    st_init_texture_functions(functions);
 663    st_init_texture_barrier_functions(functions);
 664    st_init_flush_functions(screen, functions);
 665    st_init_string_functions(functions);
 666    st_init_viewport_functions(functions);
 667    st_init_compute_functions(functions);
 668
 669    st_init_xformfb_functions(functions);
 670    st_init_syncobj_functions(functions);
 671
 672    st_init_vdpau_functions(functions);
 673
 674    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 675       functions->EmitStringMarker = st_emit_string_marker;
 676
 677    functions->Enable = st_Enable;
 678    functions->UpdateState = st_invalidate_state;
 679    functions->QueryMemoryInfo = st_query_memory_info;
 680    functions->SetBackgroundContext = st_set_background_context;
 681 }