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_memoryobjects.h"
  58 #include "st_cb_msaa.h"
  59 #include "st_cb_perfmon.h"
  60 #include "st_cb_program.h"
  61 #include "st_cb_queryobj.h"
  62 #include "st_cb_readpixels.h"
  63 #include "st_cb_texture.h"
  64 #include "st_cb_xformfb.h"
  65 #include "st_cb_flush.h"
  66 #include "st_cb_syncobj.h"
  67 #include "st_cb_strings.h"
  68 #include "st_cb_texturebarrier.h"
  69 #include "st_cb_viewport.h"
  70 #include "st_atom.h"
  71 #include "st_draw.h"
  72 #include "st_extensions.h"
  73 #include "st_gen_mipmap.h"
  74 #include "st_pbo.h"
  75 #include "st_program.h"
  76 #include "st_sampler_view.h"
  77 #include "st_vdpau.h"
  78 #include "st_texture.h"
  79 #include "pipe/p_context.h"
  80 #include "util/u_inlines.h"
  81 #include "util/u_upload_mgr.h"
  82 #include "util/u_vbuf.h"
  83 #include "cso_cache/cso_context.h"
  84
  85
  86 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  87
  88
  89 /**
  90  * Called via ctx->Driver.Enable()
  91  */
  92 static void
  93 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  94 {
  95    struct st_context *st = st_context(ctx);
  96
  97    switch (cap) {
  98    case GL_DEBUG_OUTPUT:
  99    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 100       st_update_debug_callback(st);
 101       break;
 102    default:
 103       break;
 104    }
 105 }
 106
 107
 108 /**
 109  * Called via ctx->Driver.QueryMemoryInfo()
 110  */
 111 static void
 112 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 113 {
 114    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 115    struct pipe_memory_info info;
 116
 117    assert(screen->query_memory_info);
 118    if (!screen->query_memory_info)
 119       return;
 120
 121    screen->query_memory_info(screen, &info);
 122
 123    out->total_device_memory = info.total_device_memory;
 124    out->avail_device_memory = info.avail_device_memory;
 125    out->total_staging_memory = info.total_staging_memory;
 126    out->avail_staging_memory = info.avail_staging_memory;
 127    out->device_memory_evicted = info.device_memory_evicted;
 128    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 129 }
 130
 131
 132 uint64_t
 133 st_get_active_states(struct gl_context *ctx)
 134 {
 135    struct st_vertex_program *vp =
 136       st_vertex_program(ctx->VertexProgram._Current);
 137    struct st_common_program *tcp =
 138       st_common_program(ctx->TessCtrlProgram._Current);
 139    struct st_common_program *tep =
 140       st_common_program(ctx->TessEvalProgram._Current);
 141    struct st_common_program *gp =
 142       st_common_program(ctx->GeometryProgram._Current);
 143    struct st_fragment_program *fp =
 144       st_fragment_program(ctx->FragmentProgram._Current);
 145    struct st_compute_program *cp =
 146       st_compute_program(ctx->ComputeProgram._Current);
 147    uint64_t active_shader_states = 0;
 148
 149    if (vp)
 150       active_shader_states |= vp->affected_states;
 151    if (tcp)
 152       active_shader_states |= tcp->affected_states;
 153    if (tep)
 154       active_shader_states |= tep->affected_states;
 155    if (gp)
 156       active_shader_states |= gp->affected_states;
 157    if (fp)
 158       active_shader_states |= fp->affected_states;
 159    if (cp)
 160       active_shader_states |= cp->affected_states;
 161
 162    /* Mark non-shader-resource shader states as "always active". */
 163    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 164 }
 165
 166
 167 void
 168 st_invalidate_buffers(struct st_context *st)
 169 {
 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 }
 182
 183
 184 /**
 185  * Called via ctx->Driver.UpdateState()
 186  */
 187 static void
 188 st_invalidate_state(struct gl_context *ctx)
 189 {
 190    GLbitfield new_state = ctx->NewState;
 191    struct st_context *st = st_context(ctx);
 192
 193    if (new_state & _NEW_BUFFERS) {
 194       st_invalidate_buffers(st);
 195    } else {
 196       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 197        * check them when _NEW_BUFFERS isn't set.
 198        */
 199       if (new_state & _NEW_PROGRAM)
 200          st->dirty |= ST_NEW_RASTERIZER;
 201
 202       if (new_state & _NEW_FOG)
 203          st->dirty |= ST_NEW_FS_STATE;
 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_POINT))
 215       st->dirty |= ST_NEW_RASTERIZER;
 216
 217    if (new_state & _NEW_PROJECTION &&
 218        st_user_clip_planes_enabled(ctx))
 219       st->dirty |= ST_NEW_CLIP_STATE;
 220
 221    if (new_state & _NEW_PIXEL)
 222       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 223
 224    if (new_state & _NEW_CURRENT_ATTRIB)
 225       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 226
 227    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 228    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 229       st->dirty |= ST_NEW_VS_STATE;
 230
 231    /* Which shaders are dirty will be determined manually. */
 232    if (new_state & _NEW_PROGRAM) {
 233       st->gfx_shaders_may_be_dirty = true;
 234       st->compute_shader_may_be_dirty = true;
 235       /* This will mask out unused shader resources. */
 236       st->active_states = st_get_active_states(ctx);
 237    }
 238
 239    if (new_state & _NEW_TEXTURE_OBJECT) {
 240       st->dirty |= st->active_states &
 241                    (ST_NEW_SAMPLER_VIEWS |
 242                     ST_NEW_SAMPLERS |
 243                     ST_NEW_IMAGE_UNITS);
 244       if (ctx->FragmentProgram._Current &&
 245           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 246          st->dirty |= ST_NEW_FS_STATE;
 247       }
 248    }
 249 }
 250
 251
 252 static void
 253 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 254 {
 255    uint shader, i;
 256
 257    st_destroy_atoms(st);
 258    st_destroy_draw(st);
 259    st_destroy_clear(st);
 260    st_destroy_bitmap(st);
 261    st_destroy_drawpix(st);
 262    st_destroy_drawtex(st);
 263    st_destroy_perfmon(st);
 264    st_destroy_pbo_helpers(st);
 265    st_destroy_bound_texture_handles(st);
 266    st_destroy_bound_image_handles(st);
 267
 268    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 269       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 270          pipe_sampler_view_release(st->pipe,
 271                                    &st->state.sampler_views[shader][i]);
 272       }
 273    }
 274
 275    /* free glDrawPixels cache data */
 276    free(st->drawpix_cache.image);
 277    pipe_resource_reference(&st->drawpix_cache.texture, NULL);
 278
 279    /* free glReadPixels cache data */
 280    st_invalidate_readpix_cache(st);
 281
 282    cso_destroy_context(st->cso_context);
 283
 284    if (st->pipe && destroy_pipe)
 285       st->pipe->destroy(st->pipe);
 286
 287    free(st);
 288 }
 289
 290
 291 static void
 292 st_init_driver_flags(struct st_context *st)
 293 {
 294    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 295
 296    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 297    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 298    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 299    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 300    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 301
 302    /* Shader resources */
 303    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 304    if (st->has_hw_atomics)
 305       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS;
 306    else
 307       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 308    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 309    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 310
 311    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 312    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 313    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 314    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 315    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 316    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 317
 318    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 319    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 320    f->NewScissorRect = ST_NEW_SCISSOR;
 321    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 322    f->NewAlphaTest = ST_NEW_DSA;
 323    f->NewBlend = ST_NEW_BLEND;
 324    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 325    f->NewColorMask = ST_NEW_BLEND;
 326    f->NewDepth = ST_NEW_DSA;
 327    f->NewLogicOp = ST_NEW_BLEND;
 328    f->NewStencil = ST_NEW_DSA;
 329    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 330                              ST_NEW_SAMPLE_MASK | ST_NEW_SAMPLE_SHADING;
 331    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 332    f->NewSampleMask = ST_NEW_SAMPLE_MASK;
 333    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 334
 335    /* This depends on what the gallium driver wants. */
 336    if (st->force_persample_in_shader) {
 337       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 338       f->NewSampleShading |= ST_NEW_FS_STATE;
 339    } else {
 340       f->NewSampleShading |= ST_NEW_RASTERIZER;
 341    }
 342
 343    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 344    f->NewClipPlane = ST_NEW_CLIP_STATE;
 345    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 346    f->NewDepthClamp = ST_NEW_RASTERIZER;
 347    f->NewLineState = ST_NEW_RASTERIZER;
 348    f->NewPolygonState = ST_NEW_RASTERIZER;
 349    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 350    f->NewViewport = ST_NEW_VIEWPORT;
 351 }
 352
 353
 354 static struct st_context *
 355 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 356                        const struct st_config_options *options, bool no_error)
 357 {
 358    struct pipe_screen *screen = pipe->screen;
 359    uint i;
 360    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 361
 362    st->options = *options;
 363
 364    ctx->st = st;
 365
 366    st->ctx = ctx;
 367    st->pipe = pipe;
 368
 369    /* state tracker needs the VBO module */
 370    _vbo_CreateContext(ctx);
 371
 372    st->dirty = ST_ALL_STATES_MASK;
 373
 374    st->has_user_constbuf =
 375       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 376    st->can_bind_const_buffer_as_vertex =
 377       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 378
 379    /* st/mesa always uploads zero-stride vertex attribs, and other user
 380     * vertex buffers are only possible with a compatibility profile.
 381     * So tell the u_vbuf module that user VBOs are not possible with the Core
 382     * profile, so that u_vbuf is bypassed completely if there is nothing else
 383     * to do.
 384     */
 385    unsigned vbuf_flags =
 386       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 387    st->cso_context = cso_create_context(pipe, vbuf_flags);
 388
 389    st_init_atoms(st);
 390    st_init_clear(st);
 391    st_init_draw(st);
 392    st_init_pbo_helpers(st);
 393
 394    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 395    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 396       st->internal_target = PIPE_TEXTURE_2D;
 397    else
 398       st->internal_target = PIPE_TEXTURE_RECT;
 399
 400    /* Setup vertex element info for 'struct st_util_vertex'.
 401     */
 402    {
 403       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 404
 405       /* If this assertion ever fails all state tracker calls to
 406        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 407        * particular call would have to be moved to just before each
 408        * drawing call.
 409        */
 410       assert(slot == 0);
 411
 412       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 413
 414       memset(&st->util_velems, 0, sizeof(st->util_velems));
 415       st->util_velems[0].src_offset = 0;
 416       st->util_velems[0].vertex_buffer_index = slot;
 417       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 418       st->util_velems[1].src_offset = 3 * sizeof(float);
 419       st->util_velems[1].vertex_buffer_index = slot;
 420       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 421       st->util_velems[2].src_offset = 7 * sizeof(float);
 422       st->util_velems[2].vertex_buffer_index = slot;
 423       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 424    }
 425
 426    /* we want all vertex data to be placed in buffer objects */
 427    vbo_use_buffer_objects(ctx);
 428
 429
 430    /* make sure that no VBOs are left mapped when we're drawing. */
 431    vbo_always_unmap_buffers(ctx);
 432
 433    /* Need these flags:
 434     */
 435    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 436
 437    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 438
 439    if (no_error)
 440       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 441
 442    st->has_stencil_export =
 443       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 444    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 445    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 446                                               PIPE_TEXTURE_2D, 0,
 447                                               PIPE_BIND_SAMPLER_VIEW);
 448    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 449                                               PIPE_TEXTURE_2D, 0,
 450                                               PIPE_BIND_SAMPLER_VIEW);
 451    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 452                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 453    st->force_persample_in_shader =
 454       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 455       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 456    st->has_shareable_shaders = screen->get_param(screen,
 457                                                  PIPE_CAP_SHAREABLE_SHADERS);
 458    st->needs_texcoord_semantic =
 459       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 460    st->apply_texture_swizzle_to_border_color =
 461       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 462          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 463           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 464    st->has_time_elapsed =
 465       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 466    st->has_half_float_packing =
 467       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 468    st->has_multi_draw_indirect =
 469       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 470
 471    st->has_hw_atomics =
 472       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 473                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 474       ? true : false;
 475
 476    /* GL limits and extensions */
 477    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 478    st_init_extensions(pipe->screen, &ctx->Const,
 479                       &ctx->Extensions, &st->options, ctx->API);
 480
 481    if (st_have_perfmon(st)) {
 482       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 483    }
 484
 485    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 486    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 487       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 488          st->clamp_vert_color_in_shader = GL_TRUE;
 489       }
 490
 491       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 492          st->clamp_frag_color_in_shader = GL_TRUE;
 493       }
 494
 495       /* For drivers which cannot do color clamping, it's better to just
 496        * disable ARB_color_buffer_float in the core profile, because
 497        * the clamping is deprecated there anyway. */
 498       if (ctx->API == API_OPENGL_CORE &&
 499           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 500          st->clamp_vert_color_in_shader = GL_FALSE;
 501          st->clamp_frag_color_in_shader = GL_FALSE;
 502          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 503       }
 504    }
 505
 506    /* called after _mesa_create_context/_mesa_init_point, fix default user
 507     * settable max point size up
 508     */
 509    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 510                              ctx->Const.MaxPointSizeAA);
 511    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 512     * is not supported
 513     */
 514    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 515       !st->has_shader_model3;
 516
 517    if (!ctx->Extensions.ARB_gpu_shader5) {
 518       for (i = 0; i < MESA_SHADER_STAGES; i++)
 519          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 520    }
 521
 522    /* Set which shader types can be compiled at link time. */
 523    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 524          st->has_shareable_shaders &&
 525          !st->clamp_vert_color_in_shader;
 526
 527    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 528          st->has_shareable_shaders &&
 529          !st->clamp_frag_color_in_shader &&
 530          !st->force_persample_in_shader;
 531
 532    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 533    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 534    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 535    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 536
 537    st->bitmap.cache.empty = true;
 538
 539    _mesa_compute_version(ctx);
 540
 541    if (ctx->Version == 0) {
 542       /* This can happen when a core profile was requested, but the driver
 543        * does not support some features of GL 3.1 or later.
 544        */
 545       st_destroy_context_priv(st, false);
 546       return NULL;
 547    }
 548
 549    _mesa_initialize_dispatch_tables(ctx);
 550    _mesa_initialize_vbo_vtxfmt(ctx);
 551    st_init_driver_flags(st);
 552
 553    /* Initialize context's winsys buffers list */
 554    LIST_INITHEAD(&st->winsys_buffers);
 555
 556    return st;
 557 }
 558
 559
 560 struct st_context *
 561 st_create_context(gl_api api, struct pipe_context *pipe,
 562                   const struct gl_config *visual,
 563                   struct st_context *share,
 564                   const struct st_config_options *options,
 565                   bool no_error)
 566 {
 567    struct gl_context *ctx;
 568    struct gl_context *shareCtx = share ? share->ctx : NULL;
 569    struct dd_function_table funcs;
 570    struct st_context *st;
 571
 572    memset(&funcs, 0, sizeof(funcs));
 573    st_init_driver_functions(pipe->screen, &funcs);
 574
 575    ctx = calloc(1, sizeof(struct gl_context));
 576    if (!ctx)
 577       return NULL;
 578
 579    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 580       free(ctx);
 581       return NULL;
 582    }
 583
 584    st_debug_init();
 585
 586    if (pipe->screen->get_disk_shader_cache &&
 587        !(ST_DEBUG & DEBUG_TGSI))
 588       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 589
 590    /* XXX: need a capability bit in gallium to query if the pipe
 591     * driver prefers DP4 or MUL/MAD for vertex transformation.
 592     */
 593    if (debug_get_option_mesa_mvp_dp4())
 594       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 595
 596    st = st_create_context_priv(ctx, pipe, options, no_error);
 597    if (!st) {
 598       _mesa_destroy_context(ctx);
 599    }
 600
 601    return st;
 602 }
 603
 604
 605 /**
 606  * Callback to release the sampler view attached to a texture object.
 607  * Called by _mesa_HashWalk().
 608  */
 609 static void
 610 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 611 {
 612    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 613    struct st_context *st = (struct st_context *) userData;
 614
 615    st_texture_release_sampler_view(st, st_texture_object(texObj));
 616 }
 617
 618
 619 void
 620 st_destroy_context(struct st_context *st)
 621 {
 622    struct gl_context *ctx = st->ctx;
 623    struct st_framebuffer *stfb, *next;
 624
 625    GET_CURRENT_CONTEXT(curctx);
 626
 627    if (curctx == NULL) {
 628       /* No current context, but we need one to release
 629        * renderbuffer surface when we release framebuffer.
 630        * So temporarily bind the context.
 631        */
 632       _mesa_make_current(ctx, NULL, NULL);
 633    }
 634
 635    /* This must be called first so that glthread has a chance to finish */
 636    _mesa_glthread_destroy(ctx);
 637
 638    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 639
 640    st_reference_fragprog(st, &st->fp, NULL);
 641    st_reference_prog(st, &st->gp, NULL);
 642    st_reference_vertprog(st, &st->vp, NULL);
 643    st_reference_prog(st, &st->tcp, NULL);
 644    st_reference_prog(st, &st->tep, NULL);
 645    st_reference_compprog(st, &st->cp, NULL);
 646
 647    /* release framebuffer in the winsys buffers list */
 648    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 649       st_framebuffer_reference(&stfb, NULL);
 650    }
 651
 652    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 653    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 654
 655    _vbo_DestroyContext(ctx);
 656
 657    st_destroy_program_variants(st);
 658
 659    _mesa_free_context_data(ctx);
 660
 661    /* This will free the st_context too, so 'st' must not be accessed
 662     * afterwards. */
 663    st_destroy_context_priv(st, true);
 664    st = NULL;
 665
 666    free(ctx);
 667 }
 668
 669
 670 static void
 671 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 672 {
 673    struct st_context *st = ctx->st;
 674    st->pipe->emit_string_marker(st->pipe, string, len);
 675 }
 676
 677
 678 static void
 679 st_set_background_context(struct gl_context *ctx,
 680                           struct util_queue_monitoring *queue_info)
 681 {
 682    struct st_context *st = ctx->st;
 683    struct st_manager *smapi =
 684       (struct st_manager *) st->iface.st_context_private;
 685
 686    assert(smapi->set_background_context);
 687    smapi->set_background_context(&st->iface, queue_info);
 688 }
 689
 690
 691 static void
 692 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 693 {
 694    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 695
 696    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 697    memset(uuid, 0, GL_UUID_SIZE_EXT);
 698    screen->get_device_uuid(screen, uuid);
 699 }
 700
 701
 702 static void
 703 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 704 {
 705    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 706
 707    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 708    memset(uuid, 0, GL_UUID_SIZE_EXT);
 709    screen->get_driver_uuid(screen, uuid);
 710 }
 711
 712
 713 void
 714 st_init_driver_functions(struct pipe_screen *screen,
 715                          struct dd_function_table *functions)
 716 {
 717    _mesa_init_shader_object_functions(functions);
 718    _mesa_init_sampler_object_functions(functions);
 719
 720    st_init_blit_functions(functions);
 721    st_init_bufferobject_functions(screen, functions);
 722    st_init_clear_functions(functions);
 723    st_init_bitmap_functions(functions);
 724    st_init_copy_image_functions(functions);
 725    st_init_drawpixels_functions(functions);
 726    st_init_rasterpos_functions(functions);
 727
 728    st_init_drawtex_functions(functions);
 729
 730    st_init_eglimage_functions(functions);
 731
 732    st_init_fbo_functions(functions);
 733    st_init_feedback_functions(functions);
 734    st_init_memoryobject_functions(functions);
 735    st_init_msaa_functions(functions);
 736    st_init_perfmon_functions(functions);
 737    st_init_program_functions(functions);
 738    st_init_query_functions(functions);
 739    st_init_cond_render_functions(functions);
 740    st_init_readpixels_functions(functions);
 741    st_init_texture_functions(functions);
 742    st_init_texture_barrier_functions(functions);
 743    st_init_flush_functions(screen, functions);
 744    st_init_string_functions(functions);
 745    st_init_viewport_functions(functions);
 746    st_init_compute_functions(functions);
 747
 748    st_init_xformfb_functions(functions);
 749    st_init_syncobj_functions(functions);
 750
 751    st_init_vdpau_functions(functions);
 752
 753    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 754       functions->EmitStringMarker = st_emit_string_marker;
 755
 756    functions->Enable = st_Enable;
 757    functions->UpdateState = st_invalidate_state;
 758    functions->QueryMemoryInfo = st_query_memory_info;
 759    functions->SetBackgroundContext = st_set_background_context;
 760    functions->GetDriverUuid = st_get_device_uuid;
 761    functions->GetDeviceUuid = st_get_driver_uuid;
 762 }