src/mesa/state_tracker/st_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "main/imports.h"
  29 #include "main/accum.h"
  30 #include "main/api_exec.h"
  31 #include "main/context.h"
  32 #include "main/glthread.h"
  33 #include "main/samplerobj.h"
  34 #include "main/shaderobj.h"
  35 #include "main/version.h"
  36 #include "main/vtxfmt.h"
  37 #include "main/hash.h"
  38 #include "program/prog_cache.h"
  39 #include "vbo/vbo.h"
  40 #include "glapi/glapi.h"
  41 #include "st_manager.h"
  42 #include "st_context.h"
  43 #include "st_debug.h"
  44 #include "st_cb_bitmap.h"
  45 #include "st_cb_blit.h"
  46 #include "st_cb_bufferobjects.h"
  47 #include "st_cb_clear.h"
  48 #include "st_cb_compute.h"
  49 #include "st_cb_condrender.h"
  50 #include "st_cb_copyimage.h"
  51 #include "st_cb_drawpixels.h"
  52 #include "st_cb_rasterpos.h"
  53 #include "st_cb_drawtex.h"
  54 #include "st_cb_eglimage.h"
  55 #include "st_cb_fbo.h"
  56 #include "st_cb_feedback.h"
  57 #include "st_cb_msaa.h"
  58 #include "st_cb_perfmon.h"
  59 #include "st_cb_program.h"
  60 #include "st_cb_queryobj.h"
  61 #include "st_cb_readpixels.h"
  62 #include "st_cb_texture.h"
  63 #include "st_cb_xformfb.h"
  64 #include "st_cb_flush.h"
  65 #include "st_cb_syncobj.h"
  66 #include "st_cb_strings.h"
  67 #include "st_cb_texturebarrier.h"
  68 #include "st_cb_viewport.h"
  69 #include "st_atom.h"
  70 #include "st_draw.h"
  71 #include "st_extensions.h"
  72 #include "st_gen_mipmap.h"
  73 #include "st_pbo.h"
  74 #include "st_program.h"
  75 #include "st_sampler_view.h"
  76 #include "st_vdpau.h"
  77 #include "st_texture.h"
  78 #include "pipe/p_context.h"
  79 #include "util/u_inlines.h"
  80 #include "util/u_upload_mgr.h"
  81 #include "util/u_vbuf.h"
  82 #include "cso_cache/cso_context.h"
  83
  84
  85 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  86
  87
  88 /**
  89  * Called via ctx->Driver.Enable()
  90  */
  91 static void st_Enable(struct gl_context * ctx, GLenum cap, GLboolean state)
  92 {
  93    struct st_context *st = st_context(ctx);
  94
  95    switch (cap) {
  96    case GL_DEBUG_OUTPUT:
  97    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
  98       st_update_debug_callback(st);
  99       break;
 100    default:
 101       break;
 102    }
 103 }
 104
 105
 106 /**
 107  * Called via ctx->Driver.QueryMemoryInfo()
 108  */
 109 static void
 110 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 111 {
 112    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 113    struct pipe_memory_info info;
 114
 115    assert(screen->query_memory_info);
 116    if (!screen->query_memory_info)
 117       return;
 118
 119    screen->query_memory_info(screen, &info);
 120
 121    out->total_device_memory = info.total_device_memory;
 122    out->avail_device_memory = info.avail_device_memory;
 123    out->total_staging_memory = info.total_staging_memory;
 124    out->avail_staging_memory = info.avail_staging_memory;
 125    out->device_memory_evicted = info.device_memory_evicted;
 126    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 127 }
 128
 129
 130 uint64_t
 131 st_get_active_states(struct gl_context *ctx)
 132 {
 133    struct st_vertex_program *vp =
 134       st_vertex_program(ctx->VertexProgram._Current);
 135    struct st_common_program *tcp =
 136       st_common_program(ctx->TessCtrlProgram._Current);
 137    struct st_common_program *tep =
 138       st_common_program(ctx->TessEvalProgram._Current);
 139    struct st_common_program *gp =
 140       st_common_program(ctx->GeometryProgram._Current);
 141    struct st_fragment_program *fp =
 142       st_fragment_program(ctx->FragmentProgram._Current);
 143    struct st_compute_program *cp =
 144       st_compute_program(ctx->ComputeProgram._Current);
 145    uint64_t active_shader_states = 0;
 146
 147    if (vp)
 148       active_shader_states |= vp->affected_states;
 149    if (tcp)
 150       active_shader_states |= tcp->affected_states;
 151    if (tep)
 152       active_shader_states |= tep->affected_states;
 153    if (gp)
 154       active_shader_states |= gp->affected_states;
 155    if (fp)
 156       active_shader_states |= fp->affected_states;
 157    if (cp)
 158       active_shader_states |= cp->affected_states;
 159
 160    /* Mark non-shader-resource shader states as "always active". */
 161    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 162 }
 163
 164
 165 void
 166 st_invalidate_buffers(struct st_context *st)
 167 {
 168    st->dirty |= ST_NEW_BLEND |
 169                 ST_NEW_DSA |
 170                 ST_NEW_FB_STATE |
 171                 ST_NEW_SAMPLE_MASK |
 172                 ST_NEW_SAMPLE_SHADING |
 173                 ST_NEW_FS_STATE |
 174                 ST_NEW_POLY_STIPPLE |
 175                 ST_NEW_VIEWPORT |
 176                 ST_NEW_RASTERIZER |
 177                 ST_NEW_SCISSOR |
 178                 ST_NEW_WINDOW_RECTANGLES;
 179 }
 180
 181
 182 /**
 183  * Called via ctx->Driver.UpdateState()
 184  */
 185 static void
 186 st_invalidate_state(struct gl_context * ctx)
 187 {
 188    GLbitfield new_state = ctx->NewState;
 189    struct st_context *st = st_context(ctx);
 190
 191    if (new_state & _NEW_BUFFERS) {
 192       st_invalidate_buffers(st);
 193    } else {
 194       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 195        * check them when _NEW_BUFFERS isn't set.
 196        */
 197       if (new_state & _NEW_PROGRAM)
 198          st->dirty |= ST_NEW_RASTERIZER;
 199
 200       if (new_state & _NEW_FOG)
 201          st->dirty |= ST_NEW_FS_STATE;
 202
 203       if (new_state & _NEW_FRAG_CLAMP) {
 204          if (st->clamp_frag_color_in_shader)
 205             st->dirty |= ST_NEW_FS_STATE;
 206          else
 207             st->dirty |= ST_NEW_RASTERIZER;
 208       }
 209    }
 210
 211    if (new_state & (_NEW_LIGHT |
 212                     _NEW_POINT))
 213       st->dirty |= ST_NEW_RASTERIZER;
 214
 215    if (new_state & _NEW_PROJECTION &&
 216        st_user_clip_planes_enabled(ctx))
 217       st->dirty |= ST_NEW_CLIP_STATE;
 218
 219    if (new_state & _NEW_PIXEL)
 220       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 221
 222    if (new_state & _NEW_CURRENT_ATTRIB)
 223       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 224
 225    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 226    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 227       st->dirty |= ST_NEW_VS_STATE;
 228
 229    /* Which shaders are dirty will be determined manually. */
 230    if (new_state & _NEW_PROGRAM) {
 231       st->gfx_shaders_may_be_dirty = true;
 232       st->compute_shader_may_be_dirty = true;
 233       /* This will mask out unused shader resources. */
 234       st->active_states = st_get_active_states(ctx);
 235    }
 236
 237    if (new_state & _NEW_TEXTURE_OBJECT) {
 238       st->dirty |= st->active_states &
 239                    (ST_NEW_SAMPLER_VIEWS |
 240                     ST_NEW_SAMPLERS |
 241                     ST_NEW_IMAGE_UNITS);
 242       if (ctx->FragmentProgram._Current &&
 243           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 244          st->dirty |= ST_NEW_FS_STATE;
 245       }
 246    }
 247 }
 248
 249
 250 static void
 251 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 252 {
 253    uint shader, i;
 254
 255    st_destroy_atoms( st );
 256    st_destroy_draw( st );
 257    st_destroy_clear(st);
 258    st_destroy_bitmap(st);
 259    st_destroy_drawpix(st);
 260    st_destroy_drawtex(st);
 261    st_destroy_perfmon(st);
 262    st_destroy_pbo_helpers(st);
 263    st_destroy_bound_texture_handles(st);
 264    st_destroy_bound_image_handles(st);
 265
 266    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 267       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 268          pipe_sampler_view_release(st->pipe,
 269                                    &st->state.sampler_views[shader][i]);
 270       }
 271    }
 272
 273    /* free glDrawPixels cache data */
 274    free(st->drawpix_cache.image);
 275    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 276
 277    /* free glReadPixels cache data */
 278    st_invalidate_readpix_cache(st);
 279
 280    cso_destroy_context(st->cso_context);
 281
 282    if (st->pipe && destroy_pipe)
 283       st->pipe->destroy(st->pipe);
 284
 285    free( st );
 286 }
 287
 288 static void st_init_driver_flags(struct st_context *st);
 289
 290 static struct st_context *
 291 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 292                 const struct st_config_options *options)
 293 {
 294    struct pipe_screen *screen = pipe->screen;
 295    uint i;
 296    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 297
 298    st->options = *options;
 299
 300    ctx->st = st;
 301
 302    st->ctx = ctx;
 303    st->pipe = pipe;
 304
 305    /* state tracker needs the VBO module */
 306    _vbo_CreateContext(ctx);
 307
 308    st->dirty = ST_ALL_STATES_MASK;
 309
 310    st->has_user_constbuf =
 311       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 312    st->can_bind_const_buffer_as_vertex =
 313       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 314
 315    /* Drivers still have to upload zero-stride vertex attribs manually
 316     * with the GL core profile, but they don't have to deal with any complex
 317     * user vertex buffer uploads.
 318     */
 319    unsigned vbuf_flags =
 320       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 321    st->cso_context = cso_create_context(pipe, vbuf_flags);
 322
 323    st_init_atoms( st );
 324    st_init_clear(st);
 325    st_init_draw( st );
 326    st_init_pbo_helpers(st);
 327
 328    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 329    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 330       st->internal_target = PIPE_TEXTURE_2D;
 331    else
 332       st->internal_target = PIPE_TEXTURE_RECT;
 333
 334    /* Setup vertex element info for 'struct st_util_vertex'.
 335     */
 336    {
 337       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 338
 339       /* If this assertion ever fails all state tracker calls to
 340        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 341        * particular call would have to be moved to just before each
 342        * drawing call.
 343        */
 344       assert(slot == 0);
 345
 346       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 347
 348       memset(&st->util_velems, 0, sizeof(st->util_velems));
 349       st->util_velems[0].src_offset = 0;
 350       st->util_velems[0].vertex_buffer_index = slot;
 351       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 352       st->util_velems[1].src_offset = 3 * sizeof(float);
 353       st->util_velems[1].vertex_buffer_index = slot;
 354       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 355       st->util_velems[2].src_offset = 7 * sizeof(float);
 356       st->util_velems[2].vertex_buffer_index = slot;
 357       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 358    }
 359
 360    /* we want all vertex data to be placed in buffer objects */
 361    vbo_use_buffer_objects(ctx);
 362
 363
 364    /* make sure that no VBOs are left mapped when we're drawing. */
 365    vbo_always_unmap_buffers(ctx);
 366
 367    /* Need these flags:
 368     */
 369    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 370
 371    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 372
 373    st->has_stencil_export =
 374       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 375    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 376    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 377                                               PIPE_TEXTURE_2D, 0,
 378                                               PIPE_BIND_SAMPLER_VIEW);
 379    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 380                                               PIPE_TEXTURE_2D, 0,
 381                                               PIPE_BIND_SAMPLER_VIEW);
 382    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 383                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 384    st->force_persample_in_shader =
 385       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 386       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 387    st->has_shareable_shaders = screen->get_param(screen,
 388                                                  PIPE_CAP_SHAREABLE_SHADERS);
 389    st->needs_texcoord_semantic =
 390       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 391    st->apply_texture_swizzle_to_border_color =
 392       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 393          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 394           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 395    st->has_time_elapsed =
 396       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 397    st->has_half_float_packing =
 398       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 399    st->has_multi_draw_indirect =
 400       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 401
 402    /* GL limits and extensions */
 403    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 404    st_init_extensions(pipe->screen, &ctx->Const,
 405                       &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
 406
 407    if (st_have_perfmon(st)) {
 408       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 409    }
 410
 411    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 412    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 413       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 414          st->clamp_vert_color_in_shader = GL_TRUE;
 415       }
 416
 417       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 418          st->clamp_frag_color_in_shader = GL_TRUE;
 419       }
 420
 421       /* For drivers which cannot do color clamping, it's better to just
 422        * disable ARB_color_buffer_float in the core profile, because
 423        * the clamping is deprecated there anyway. */
 424       if (ctx->API == API_OPENGL_CORE &&
 425           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 426          st->clamp_vert_color_in_shader = GL_FALSE;
 427          st->clamp_frag_color_in_shader = GL_FALSE;
 428          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 429       }
 430    }
 431
 432    /* called after _mesa_create_context/_mesa_init_point, fix default user
 433     * settable max point size up
 434     */
 435    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 436                              ctx->Const.MaxPointSizeAA);
 437    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 438    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 439
 440    if (!ctx->Extensions.ARB_gpu_shader5) {
 441       for (i = 0; i < MESA_SHADER_STAGES; i++)
 442          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 443    }
 444
 445    /* Set which shader types can be compiled at link time. */
 446    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 447          st->has_shareable_shaders &&
 448          !st->clamp_vert_color_in_shader;
 449
 450    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 451          st->has_shareable_shaders &&
 452          !st->clamp_frag_color_in_shader &&
 453          !st->force_persample_in_shader;
 454
 455    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 456    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 457    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 458    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 459
 460    st->bitmap.cache.empty = true;
 461
 462    _mesa_compute_version(ctx);
 463
 464    if (ctx->Version == 0) {
 465       /* This can happen when a core profile was requested, but the driver
 466        * does not support some features of GL 3.1 or later.
 467        */
 468       st_destroy_context_priv(st, false);
 469       return NULL;
 470    }
 471
 472    _mesa_initialize_dispatch_tables(ctx);
 473    _mesa_initialize_vbo_vtxfmt(ctx);
 474    st_init_driver_flags(st);
 475
 476    return st;
 477 }
 478
 479 static void st_init_driver_flags(struct st_context *st)
 480 {
 481    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 482
 483    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 484    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 485    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 486    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 487
 488    /* Shader resources */
 489    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 490    f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 491    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 492    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 493
 494    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 495    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 496    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 497    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 498    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 499    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 500
 501    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 502    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 503    f->NewScissorRect = ST_NEW_SCISSOR;
 504    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 505    f->NewAlphaTest = ST_NEW_DSA;
 506    f->NewBlend = ST_NEW_BLEND;
 507    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 508    f->NewColorMask = ST_NEW_BLEND;
 509    f->NewDepth = ST_NEW_DSA;
 510    f->NewLogicOp = ST_NEW_BLEND;
 511    f->NewStencil = ST_NEW_DSA;
 512    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 513                              ST_NEW_SAMPLE_MASK | ST_NEW_SAMPLE_SHADING;
 514    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 515    f->NewSampleMask = ST_NEW_SAMPLE_MASK;
 516    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 517
 518    /* This depends on what the gallium driver wants. */
 519    if (st->force_persample_in_shader) {
 520       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 521       f->NewSampleShading |= ST_NEW_FS_STATE;
 522    } else {
 523       f->NewSampleShading |= ST_NEW_RASTERIZER;
 524    }
 525
 526    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 527    f->NewClipPlane = ST_NEW_CLIP_STATE;
 528    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 529    f->NewDepthClamp = ST_NEW_RASTERIZER;
 530    f->NewLineState = ST_NEW_RASTERIZER;
 531    f->NewPolygonState = ST_NEW_RASTERIZER;
 532    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 533    f->NewViewport = ST_NEW_VIEWPORT;
 534 }
 535
 536 struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
 537                                      const struct gl_config *visual,
 538                                      struct st_context *share,
 539                                      const struct st_config_options *options)
 540 {
 541    struct gl_context *ctx;
 542    struct gl_context *shareCtx = share ? share->ctx : NULL;
 543    struct dd_function_table funcs;
 544    struct st_context *st;
 545
 546    memset(&funcs, 0, sizeof(funcs));
 547    st_init_driver_functions(pipe->screen, &funcs);
 548
 549    ctx = calloc(1, sizeof(struct gl_context));
 550    if (!ctx)
 551       return NULL;
 552
 553    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 554       free(ctx);
 555       return NULL;
 556    }
 557
 558    st_debug_init();
 559
 560    if (pipe->screen->get_disk_shader_cache &&
 561        !(ST_DEBUG & DEBUG_TGSI))
 562       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 563
 564    /* XXX: need a capability bit in gallium to query if the pipe
 565     * driver prefers DP4 or MUL/MAD for vertex transformation.
 566     */
 567    if (debug_get_option_mesa_mvp_dp4())
 568       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 569
 570    st = st_create_context_priv(ctx, pipe, options);
 571    if (!st) {
 572       _mesa_destroy_context(ctx);
 573    }
 574
 575    /* Initialize context's winsys buffers list */
 576    LIST_INITHEAD(&st->winsys_buffers);
 577
 578    return st;
 579 }
 580
 581
 582 /**
 583  * Callback to release the sampler view attached to a texture object.
 584  * Called by _mesa_HashWalk().
 585  */
 586 static void
 587 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 588 {
 589    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 590    struct st_context *st = (struct st_context *) userData;
 591
 592    st_texture_release_sampler_view(st, st_texture_object(texObj));
 593 }
 594
 595 void st_destroy_context( struct st_context *st )
 596 {
 597    struct gl_context *ctx = st->ctx;
 598    struct st_framebuffer *stfb, *next;
 599
 600    GET_CURRENT_CONTEXT(curctx);
 601    if (curctx == NULL) {
 602
 603       /* No current context, but we need one to release
 604        * renderbuffer surface when we release framebuffer.
 605        * So temporarily bind the context.
 606        */
 607       _mesa_make_current(ctx, NULL, NULL);
 608    }
 609
 610    /* This must be called first so that glthread has a chance to finish */
 611    _mesa_glthread_destroy(ctx);
 612
 613    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 614
 615    st_reference_fragprog(st, &st->fp, NULL);
 616    st_reference_prog(st, &st->gp, NULL);
 617    st_reference_vertprog(st, &st->vp, NULL);
 618    st_reference_prog(st, &st->tcp, NULL);
 619    st_reference_prog(st, &st->tep, NULL);
 620    st_reference_compprog(st, &st->cp, NULL);
 621
 622    /* release framebuffer in the winsys buffers list */
 623    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 624       st_framebuffer_reference(&stfb, NULL);
 625    }
 626
 627    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 628    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 629
 630    _vbo_DestroyContext(ctx);
 631
 632    st_destroy_program_variants(st);
 633
 634    _mesa_free_context_data(ctx);
 635
 636    /* This will free the st_context too, so 'st' must not be accessed
 637     * afterwards. */
 638    st_destroy_context_priv(st, true);
 639    st = NULL;
 640
 641    free(ctx);
 642 }
 643
 644 static void
 645 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 646 {
 647    struct st_context *st = ctx->st;
 648    st->pipe->emit_string_marker(st->pipe, string, len);
 649 }
 650
 651 static void
 652 st_set_background_context(struct gl_context *ctx,
 653                           struct util_queue_monitoring *queue_info)
 654 {
 655    struct st_context *st = ctx->st;
 656    struct st_manager *smapi =
 657       (struct st_manager*)st->iface.st_context_private;
 658
 659    assert(smapi->set_background_context);
 660    smapi->set_background_context(&st->iface, queue_info);
 661 }
 662
 663 void st_init_driver_functions(struct pipe_screen *screen,
 664                               struct dd_function_table *functions)
 665 {
 666    _mesa_init_shader_object_functions(functions);
 667    _mesa_init_sampler_object_functions(functions);
 668
 669    st_init_blit_functions(functions);
 670    st_init_bufferobject_functions(screen, functions);
 671    st_init_clear_functions(functions);
 672    st_init_bitmap_functions(functions);
 673    st_init_copy_image_functions(functions);
 674    st_init_drawpixels_functions(functions);
 675    st_init_rasterpos_functions(functions);
 676
 677    st_init_drawtex_functions(functions);
 678
 679    st_init_eglimage_functions(functions);
 680
 681    st_init_fbo_functions(functions);
 682    st_init_feedback_functions(functions);
 683    st_init_msaa_functions(functions);
 684    st_init_perfmon_functions(functions);
 685    st_init_program_functions(functions);
 686    st_init_query_functions(functions);
 687    st_init_cond_render_functions(functions);
 688    st_init_readpixels_functions(functions);
 689    st_init_texture_functions(functions);
 690    st_init_texture_barrier_functions(functions);
 691    st_init_flush_functions(screen, functions);
 692    st_init_string_functions(functions);
 693    st_init_viewport_functions(functions);
 694    st_init_compute_functions(functions);
 695
 696    st_init_xformfb_functions(functions);
 697    st_init_syncobj_functions(functions);
 698
 699    st_init_vdpau_functions(functions);
 700
 701    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 702       functions->EmitStringMarker = st_emit_string_marker;
 703
 704    functions->Enable = st_Enable;
 705    functions->UpdateState = st_invalidate_state;
 706    functions->QueryMemoryInfo = st_query_memory_info;
 707    functions->SetBackgroundContext = st_set_background_context;
 708 }