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_semaphoreobjects.h"
  64 #include "st_cb_texture.h"
  65 #include "st_cb_xformfb.h"
  66 #include "st_cb_flush.h"
  67 #include "st_cb_syncobj.h"
  68 #include "st_cb_strings.h"
  69 #include "st_cb_texturebarrier.h"
  70 #include "st_cb_viewport.h"
  71 #include "st_atom.h"
  72 #include "st_draw.h"
  73 #include "st_extensions.h"
  74 #include "st_gen_mipmap.h"
  75 #include "st_pbo.h"
  76 #include "st_program.h"
  77 #include "st_sampler_view.h"
  78 #include "st_shader_cache.h"
  79 #include "st_vdpau.h"
  80 #include "st_texture.h"
  81 #include "st_util.h"
  82 #include "pipe/p_context.h"
  83 #include "util/u_cpu_detect.h"
  84 #include "util/u_inlines.h"
  85 #include "util/u_upload_mgr.h"
  86 #include "util/u_vbuf.h"
  87 #include "cso_cache/cso_context.h"
  88 #include "compiler/glsl/glsl_parser_extras.h"
  89
  90
  91 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  92
  93
  94 /**
  95  * Called via ctx->Driver.Enable()
  96  */
  97 static void
  98 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  99 {
 100    struct st_context *st = st_context(ctx);
 101
 102    switch (cap) {
 103    case GL_DEBUG_OUTPUT:
 104    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 105       st_update_debug_callback(st);
 106       break;
 107    default:
 108       break;
 109    }
 110 }
 111
 112
 113 /**
 114  * Called via ctx->Driver.QueryMemoryInfo()
 115  */
 116 static void
 117 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 118 {
 119    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 120    struct pipe_memory_info info;
 121
 122    assert(screen->query_memory_info);
 123    if (!screen->query_memory_info)
 124       return;
 125
 126    screen->query_memory_info(screen, &info);
 127
 128    out->total_device_memory = info.total_device_memory;
 129    out->avail_device_memory = info.avail_device_memory;
 130    out->total_staging_memory = info.total_staging_memory;
 131    out->avail_staging_memory = info.avail_staging_memory;
 132    out->device_memory_evicted = info.device_memory_evicted;
 133    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 134 }
 135
 136
 137 static uint64_t
 138 st_get_active_states(struct gl_context *ctx)
 139 {
 140    struct st_vertex_program *vp =
 141       st_vertex_program(ctx->VertexProgram._Current);
 142    struct st_common_program *tcp =
 143       st_common_program(ctx->TessCtrlProgram._Current);
 144    struct st_common_program *tep =
 145       st_common_program(ctx->TessEvalProgram._Current);
 146    struct st_common_program *gp =
 147       st_common_program(ctx->GeometryProgram._Current);
 148    struct st_fragment_program *fp =
 149       st_fragment_program(ctx->FragmentProgram._Current);
 150    struct st_compute_program *cp =
 151       st_compute_program(ctx->ComputeProgram._Current);
 152    uint64_t active_shader_states = 0;
 153
 154    if (vp)
 155       active_shader_states |= vp->affected_states;
 156    if (tcp)
 157       active_shader_states |= tcp->affected_states;
 158    if (tep)
 159       active_shader_states |= tep->affected_states;
 160    if (gp)
 161       active_shader_states |= gp->affected_states;
 162    if (fp)
 163       active_shader_states |= fp->affected_states;
 164    if (cp)
 165       active_shader_states |= cp->affected_states;
 166
 167    /* Mark non-shader-resource shader states as "always active". */
 168    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 169 }
 170
 171
 172 void
 173 st_invalidate_buffers(struct st_context *st)
 174 {
 175    st->dirty |= ST_NEW_BLEND |
 176                 ST_NEW_DSA |
 177                 ST_NEW_FB_STATE |
 178                 ST_NEW_SAMPLE_STATE |
 179                 ST_NEW_SAMPLE_SHADING |
 180                 ST_NEW_FS_STATE |
 181                 ST_NEW_POLY_STIPPLE |
 182                 ST_NEW_VIEWPORT |
 183                 ST_NEW_RASTERIZER |
 184                 ST_NEW_SCISSOR |
 185                 ST_NEW_WINDOW_RECTANGLES;
 186 }
 187
 188
 189 static inline bool
 190 st_vp_uses_current_values(const struct gl_context *ctx)
 191 {
 192    const uint64_t inputs = ctx->VertexProgram._Current->info.inputs_read;
 193    return _mesa_draw_current_bits(ctx) & inputs;
 194 }
 195
 196
 197 /**
 198  * Called via ctx->Driver.UpdateState()
 199  */
 200 static void
 201 st_invalidate_state(struct gl_context *ctx)
 202 {
 203    GLbitfield new_state = ctx->NewState;
 204    struct st_context *st = st_context(ctx);
 205
 206    if (new_state & _NEW_BUFFERS) {
 207       st_invalidate_buffers(st);
 208    } else {
 209       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 210        * check them when _NEW_BUFFERS isn't set.
 211        */
 212       if (new_state & _NEW_PROGRAM)
 213          st->dirty |= ST_NEW_RASTERIZER;
 214
 215       if (new_state & _NEW_FOG)
 216          st->dirty |= ST_NEW_FS_STATE;
 217
 218       if (new_state & _NEW_FRAG_CLAMP) {
 219          if (st->clamp_frag_color_in_shader)
 220             st->dirty |= ST_NEW_FS_STATE;
 221          else
 222             st->dirty |= ST_NEW_RASTERIZER;
 223       }
 224    }
 225
 226    if (new_state & (_NEW_LIGHT |
 227                     _NEW_POINT))
 228       st->dirty |= ST_NEW_RASTERIZER;
 229
 230    if (new_state & _NEW_PROJECTION &&
 231        st_user_clip_planes_enabled(ctx))
 232       st->dirty |= ST_NEW_CLIP_STATE;
 233
 234    if (new_state & _NEW_PIXEL)
 235       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 236
 237    if (new_state & _NEW_CURRENT_ATTRIB && st_vp_uses_current_values(ctx))
 238       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 239
 240    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 241    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 242       st->dirty |= ST_NEW_VS_STATE;
 243
 244    /* Which shaders are dirty will be determined manually. */
 245    if (new_state & _NEW_PROGRAM) {
 246       st->gfx_shaders_may_be_dirty = true;
 247       st->compute_shader_may_be_dirty = true;
 248       /* This will mask out unused shader resources. */
 249       st->active_states = st_get_active_states(ctx);
 250    }
 251
 252    if (new_state & _NEW_TEXTURE_OBJECT) {
 253       st->dirty |= st->active_states &
 254                    (ST_NEW_SAMPLER_VIEWS |
 255                     ST_NEW_SAMPLERS |
 256                     ST_NEW_IMAGE_UNITS);
 257       if (ctx->FragmentProgram._Current &&
 258           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 259          st->dirty |= ST_NEW_FS_STATE;
 260       }
 261    }
 262 }
 263
 264
 265 /*
 266  * In some circumstances (such as running google-chrome) the state
 267  * tracker may try to delete a resource view from a context different
 268  * than when it was created.  We don't want to do that.
 269  *
 270  * In that situation, st_texture_release_all_sampler_views() calls this
 271  * function to transfer the sampler view reference to this context (expected
 272  * to be the context which created the view.)
 273  */
 274 void
 275 st_save_zombie_sampler_view(struct st_context *st,
 276                             struct pipe_sampler_view *view)
 277 {
 278    struct st_zombie_sampler_view_node *entry;
 279
 280    assert(view->context == st->pipe);
 281
 282    entry = MALLOC_STRUCT(st_zombie_sampler_view_node);
 283    if (!entry)
 284       return;
 285
 286    entry->view = view;
 287
 288    /* We need a mutex since this function may be called from one thread
 289     * while free_zombie_resource_views() is called from another.
 290     */
 291    mtx_lock(&st->zombie_sampler_views.mutex);
 292    LIST_ADDTAIL(&entry->node, &st->zombie_sampler_views.list.node);
 293    mtx_unlock(&st->zombie_sampler_views.mutex);
 294 }
 295
 296
 297 /*
 298  * Since OpenGL shaders may be shared among contexts, we can wind up
 299  * with variants of a shader created with different contexts.
 300  * When we go to destroy a gallium shader, we want to free it with the
 301  * same context that it was created with, unless the driver reports
 302  * PIPE_CAP_SHAREABLE_SHADERS = TRUE.
 303  */
 304 void
 305 st_save_zombie_shader(struct st_context *st,
 306                       enum pipe_shader_type type,
 307                       struct pipe_shader_state *shader)
 308 {
 309    struct st_zombie_shader_node *entry;
 310
 311    /* we shouldn't be here if the driver supports shareable shaders */
 312    assert(!st->has_shareable_shaders);
 313
 314    entry = MALLOC_STRUCT(st_zombie_shader_node);
 315    if (!entry)
 316       return;
 317
 318    entry->shader = shader;
 319    entry->type = type;
 320
 321    /* We need a mutex since this function may be called from one thread
 322     * while free_zombie_shaders() is called from another.
 323     */
 324    mtx_lock(&st->zombie_shaders.mutex);
 325    LIST_ADDTAIL(&entry->node, &st->zombie_shaders.list.node);
 326    mtx_unlock(&st->zombie_shaders.mutex);
 327 }
 328
 329
 330 /*
 331  * Free any zombie sampler views that may be attached to this context.
 332  */
 333 static void
 334 free_zombie_sampler_views(struct st_context *st)
 335 {
 336    struct st_zombie_sampler_view_node *entry, *next;
 337
 338    if (LIST_IS_EMPTY(&st->zombie_sampler_views.list.node)) {
 339       return;
 340    }
 341
 342    mtx_lock(&st->zombie_sampler_views.mutex);
 343
 344    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 345                             &st->zombie_sampler_views.list.node, node) {
 346       LIST_DEL(&entry->node);  // remove this entry from the list
 347
 348       assert(entry->view->context == st->pipe);
 349       pipe_sampler_view_reference(&entry->view, NULL);
 350
 351       free(entry);
 352    }
 353
 354    assert(LIST_IS_EMPTY(&st->zombie_sampler_views.list.node));
 355
 356    mtx_unlock(&st->zombie_sampler_views.mutex);
 357 }
 358
 359
 360 /*
 361  * Free any zombie shaders that may be attached to this context.
 362  */
 363 static void
 364 free_zombie_shaders(struct st_context *st)
 365 {
 366    struct st_zombie_shader_node *entry, *next;
 367
 368    if (LIST_IS_EMPTY(&st->zombie_shaders.list.node)) {
 369       return;
 370    }
 371
 372    mtx_lock(&st->zombie_shaders.mutex);
 373
 374    LIST_FOR_EACH_ENTRY_SAFE(entry, next,
 375                             &st->zombie_shaders.list.node, node) {
 376       LIST_DEL(&entry->node);  // remove this entry from the list
 377
 378       switch (entry->type) {
 379       case PIPE_SHADER_VERTEX:
 380          cso_delete_vertex_shader(st->cso_context, entry->shader);
 381          break;
 382       case PIPE_SHADER_FRAGMENT:
 383          cso_delete_fragment_shader(st->cso_context, entry->shader);
 384          break;
 385       case PIPE_SHADER_GEOMETRY:
 386          cso_delete_geometry_shader(st->cso_context, entry->shader);
 387          break;
 388       case PIPE_SHADER_TESS_CTRL:
 389          cso_delete_tessctrl_shader(st->cso_context, entry->shader);
 390          break;
 391       case PIPE_SHADER_TESS_EVAL:
 392          cso_delete_tesseval_shader(st->cso_context, entry->shader);
 393          break;
 394       case PIPE_SHADER_COMPUTE:
 395          cso_delete_compute_shader(st->cso_context, entry->shader);
 396          break;
 397       default:
 398          unreachable("invalid shader type in free_zombie_shaders()");
 399       }
 400       free(entry);
 401    }
 402
 403    assert(LIST_IS_EMPTY(&st->zombie_shaders.list.node));
 404
 405    mtx_unlock(&st->zombie_shaders.mutex);
 406 }
 407
 408
 409 /*
 410  * This function is called periodically to free any zombie objects
 411  * which are attached to this context.
 412  */
 413 void
 414 st_context_free_zombie_objects(struct st_context *st)
 415 {
 416    free_zombie_sampler_views(st);
 417    free_zombie_shaders(st);
 418 }
 419
 420
 421 static void
 422 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 423 {
 424    uint i;
 425
 426    st_destroy_atoms(st);
 427    st_destroy_draw(st);
 428    st_destroy_clear(st);
 429    st_destroy_bitmap(st);
 430    st_destroy_drawpix(st);
 431    st_destroy_drawtex(st);
 432    st_destroy_perfmon(st);
 433    st_destroy_pbo_helpers(st);
 434    st_destroy_bound_texture_handles(st);
 435    st_destroy_bound_image_handles(st);
 436
 437    for (i = 0; i < ARRAY_SIZE(st->state.frag_sampler_views); i++) {
 438       pipe_sampler_view_reference(&st->state.frag_sampler_views[i], NULL);
 439    }
 440
 441    /* free glReadPixels cache data */
 442    st_invalidate_readpix_cache(st);
 443    util_throttle_deinit(st->pipe->screen, &st->throttle);
 444
 445    cso_destroy_context(st->cso_context);
 446
 447    if (st->pipe && destroy_pipe)
 448       st->pipe->destroy(st->pipe);
 449
 450    free(st);
 451 }
 452
 453
 454 static void
 455 st_init_driver_flags(struct st_context *st)
 456 {
 457    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 458
 459    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 460    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 461    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 462    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 463    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 464
 465    /* Shader resources */
 466    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 467    if (st->has_hw_atomics)
 468       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS | ST_NEW_CS_ATOMICS;
 469    else
 470       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 471    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 472    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 473
 474    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 475    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 476    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 477    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 478    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 479    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 480
 481    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 482    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 483    f->NewScissorRect = ST_NEW_SCISSOR;
 484    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 485    f->NewAlphaTest = ST_NEW_DSA;
 486    f->NewBlend = ST_NEW_BLEND;
 487    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 488    f->NewColorMask = ST_NEW_BLEND;
 489    f->NewDepth = ST_NEW_DSA;
 490    f->NewLogicOp = ST_NEW_BLEND;
 491    f->NewStencil = ST_NEW_DSA;
 492    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 493                              ST_NEW_SAMPLE_STATE | ST_NEW_SAMPLE_SHADING;
 494    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 495    f->NewSampleMask = ST_NEW_SAMPLE_STATE;
 496    f->NewSampleLocations = ST_NEW_SAMPLE_STATE;
 497    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 498
 499    /* This depends on what the gallium driver wants. */
 500    if (st->force_persample_in_shader) {
 501       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 502       f->NewSampleShading |= ST_NEW_FS_STATE;
 503    } else {
 504       f->NewSampleShading |= ST_NEW_RASTERIZER;
 505    }
 506
 507    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 508    f->NewClipPlane = ST_NEW_CLIP_STATE;
 509    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 510    f->NewDepthClamp = ST_NEW_RASTERIZER;
 511    f->NewLineState = ST_NEW_RASTERIZER;
 512    f->NewPolygonState = ST_NEW_RASTERIZER;
 513    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 514    f->NewViewport = ST_NEW_VIEWPORT;
 515    f->NewNvConservativeRasterization = ST_NEW_RASTERIZER;
 516    f->NewNvConservativeRasterizationParams = ST_NEW_RASTERIZER;
 517    f->NewIntelConservativeRasterization = ST_NEW_RASTERIZER;
 518 }
 519
 520
 521 static struct st_context *
 522 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 523                        const struct st_config_options *options, bool no_error)
 524 {
 525    struct pipe_screen *screen = pipe->screen;
 526    uint i;
 527    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 528
 529    st->options = *options;
 530
 531    ctx->st = st;
 532
 533    st->ctx = ctx;
 534    st->pipe = pipe;
 535
 536    /* state tracker needs the VBO module */
 537    _vbo_CreateContext(ctx);
 538
 539    st->dirty = ST_ALL_STATES_MASK;
 540
 541    st->can_bind_const_buffer_as_vertex =
 542       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 543
 544    /* st/mesa always uploads zero-stride vertex attribs, and other user
 545     * vertex buffers are only possible with a compatibility profile.
 546     * So tell the u_vbuf module that user VBOs are not possible with the Core
 547     * profile, so that u_vbuf is bypassed completely if there is nothing else
 548     * to do.
 549     */
 550    unsigned vbuf_flags =
 551       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 552    st->cso_context = cso_create_context(pipe, vbuf_flags);
 553
 554    st_init_atoms(st);
 555    st_init_clear(st);
 556    st_init_pbo_helpers(st);
 557
 558    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 559    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 560       st->internal_target = PIPE_TEXTURE_2D;
 561    else
 562       st->internal_target = PIPE_TEXTURE_RECT;
 563
 564    /* Setup vertex element info for 'struct st_util_vertex'.
 565     */
 566    {
 567       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 568
 569       memset(&st->util_velems, 0, sizeof(st->util_velems));
 570       st->util_velems[0].src_offset = 0;
 571       st->util_velems[0].vertex_buffer_index = 0;
 572       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 573       st->util_velems[1].src_offset = 3 * sizeof(float);
 574       st->util_velems[1].vertex_buffer_index = 0;
 575       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 576       st->util_velems[2].src_offset = 7 * sizeof(float);
 577       st->util_velems[2].vertex_buffer_index = 0;
 578       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 579    }
 580
 581    /* we want all vertex data to be placed in buffer objects */
 582    vbo_use_buffer_objects(ctx);
 583
 584
 585    /* make sure that no VBOs are left mapped when we're drawing. */
 586    vbo_always_unmap_buffers(ctx);
 587
 588    /* Need these flags:
 589     */
 590    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 591
 592    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 593
 594    if (no_error)
 595       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 596
 597    ctx->Const.PackedDriverUniformStorage =
 598       screen->get_param(screen, PIPE_CAP_PACKED_UNIFORMS);
 599
 600    st->has_stencil_export =
 601       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 602    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 603    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 604                                               PIPE_TEXTURE_2D, 0, 0,
 605                                               PIPE_BIND_SAMPLER_VIEW);
 606    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 607                                               PIPE_TEXTURE_2D, 0, 0,
 608                                               PIPE_BIND_SAMPLER_VIEW);
 609    st->has_astc_2d_ldr =
 610       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
 611                                   PIPE_TEXTURE_2D, 0, 0, PIPE_BIND_SAMPLER_VIEW);
 612    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 613                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 614    st->force_persample_in_shader =
 615       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 616       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 617    st->has_shareable_shaders = screen->get_param(screen,
 618                                                  PIPE_CAP_SHAREABLE_SHADERS);
 619    st->needs_texcoord_semantic =
 620       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 621    st->apply_texture_swizzle_to_border_color =
 622       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 623          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 624           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 625    st->has_time_elapsed =
 626       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 627    st->has_half_float_packing =
 628       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 629    st->has_multi_draw_indirect =
 630       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 631    st->has_single_pipe_stat =
 632       screen->get_param(screen, PIPE_CAP_QUERY_PIPELINE_STATISTICS_SINGLE);
 633    st->has_indep_blend_func =
 634       screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC);
 635    st->needs_rgb_dst_alpha_override =
 636       screen->get_param(screen, PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND);
 637
 638    st->has_hw_atomics =
 639       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 640                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 641       ? true : false;
 642
 643    util_throttle_init(&st->throttle,
 644                       screen->get_param(screen,
 645                                         PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET));
 646
 647    /* GL limits and extensions */
 648    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions, ctx->API);
 649    st_init_extensions(pipe->screen, &ctx->Const,
 650                       &ctx->Extensions, &st->options, ctx->API);
 651
 652    if (st_have_perfmon(st)) {
 653       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 654    }
 655
 656    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 657    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 658       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 659          st->clamp_vert_color_in_shader = GL_TRUE;
 660       }
 661
 662       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 663          st->clamp_frag_color_in_shader = GL_TRUE;
 664       }
 665
 666       /* For drivers which cannot do color clamping, it's better to just
 667        * disable ARB_color_buffer_float in the core profile, because
 668        * the clamping is deprecated there anyway. */
 669       if (ctx->API == API_OPENGL_CORE &&
 670           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 671          st->clamp_vert_color_in_shader = GL_FALSE;
 672          st->clamp_frag_color_in_shader = GL_FALSE;
 673          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 674       }
 675    }
 676
 677    /* called after _mesa_create_context/_mesa_init_point, fix default user
 678     * settable max point size up
 679     */
 680    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 681                              ctx->Const.MaxPointSizeAA);
 682    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 683     * is not supported
 684     */
 685    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 686       !st->has_shader_model3;
 687
 688    if (!ctx->Extensions.ARB_gpu_shader5) {
 689       for (i = 0; i < MESA_SHADER_STAGES; i++)
 690          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 691    }
 692
 693    /* Set which shader types can be compiled at link time. */
 694    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 695          st->has_shareable_shaders &&
 696          !st->clamp_vert_color_in_shader;
 697
 698    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 699          st->has_shareable_shaders &&
 700          !st->clamp_frag_color_in_shader &&
 701          !st->force_persample_in_shader;
 702
 703    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 704    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 705    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 706    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 707
 708    st->bitmap.cache.empty = true;
 709
 710    _mesa_override_extensions(ctx);
 711    _mesa_compute_version(ctx);
 712
 713    if (ctx->Version == 0) {
 714       /* This can happen when a core profile was requested, but the driver
 715        * does not support some features of GL 3.1 or later.
 716        */
 717       st_destroy_context_priv(st, false);
 718       return NULL;
 719    }
 720
 721    _mesa_initialize_dispatch_tables(ctx);
 722    _mesa_initialize_vbo_vtxfmt(ctx);
 723    st_init_driver_flags(st);
 724
 725    /* Initialize context's winsys buffers list */
 726    LIST_INITHEAD(&st->winsys_buffers);
 727
 728    LIST_INITHEAD(&st->zombie_sampler_views.list.node);
 729    mtx_init(&st->zombie_sampler_views.mutex, mtx_plain);
 730    LIST_INITHEAD(&st->zombie_shaders.list.node);
 731    mtx_init(&st->zombie_shaders.mutex, mtx_plain);
 732
 733    return st;
 734 }
 735
 736
 737 static void
 738 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 739 {
 740    struct st_context *st = ctx->st;
 741    st->pipe->emit_string_marker(st->pipe, string, len);
 742 }
 743
 744
 745 static void
 746 st_set_background_context(struct gl_context *ctx,
 747                           struct util_queue_monitoring *queue_info)
 748 {
 749    struct st_context *st = ctx->st;
 750    struct st_manager *smapi =
 751       (struct st_manager *) st->iface.st_context_private;
 752
 753    assert(smapi->set_background_context);
 754    smapi->set_background_context(&st->iface, queue_info);
 755 }
 756
 757
 758 static void
 759 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 760 {
 761    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 762
 763    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 764    memset(uuid, 0, GL_UUID_SIZE_EXT);
 765    screen->get_device_uuid(screen, uuid);
 766 }
 767
 768
 769 static void
 770 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 771 {
 772    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 773
 774    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 775    memset(uuid, 0, GL_UUID_SIZE_EXT);
 776    screen->get_driver_uuid(screen, uuid);
 777 }
 778
 779
 780 static void
 781 st_init_driver_functions(struct pipe_screen *screen,
 782                          struct dd_function_table *functions)
 783 {
 784    _mesa_init_sampler_object_functions(functions);
 785
 786    st_init_draw_functions(functions);
 787    st_init_blit_functions(functions);
 788    st_init_bufferobject_functions(screen, functions);
 789    st_init_clear_functions(functions);
 790    st_init_bitmap_functions(functions);
 791    st_init_copy_image_functions(functions);
 792    st_init_drawpixels_functions(functions);
 793    st_init_rasterpos_functions(functions);
 794
 795    st_init_drawtex_functions(functions);
 796
 797    st_init_eglimage_functions(functions);
 798
 799    st_init_fbo_functions(functions);
 800    st_init_feedback_functions(functions);
 801    st_init_memoryobject_functions(functions);
 802    st_init_msaa_functions(functions);
 803    st_init_perfmon_functions(functions);
 804    st_init_program_functions(functions);
 805    st_init_query_functions(functions);
 806    st_init_cond_render_functions(functions);
 807    st_init_readpixels_functions(functions);
 808    st_init_semaphoreobject_functions(functions);
 809    st_init_texture_functions(functions);
 810    st_init_texture_barrier_functions(functions);
 811    st_init_flush_functions(screen, functions);
 812    st_init_string_functions(functions);
 813    st_init_viewport_functions(functions);
 814    st_init_compute_functions(functions);
 815
 816    st_init_xformfb_functions(functions);
 817    st_init_syncobj_functions(functions);
 818
 819    st_init_vdpau_functions(functions);
 820
 821    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 822       functions->EmitStringMarker = st_emit_string_marker;
 823
 824    functions->Enable = st_Enable;
 825    functions->UpdateState = st_invalidate_state;
 826    functions->QueryMemoryInfo = st_query_memory_info;
 827    functions->SetBackgroundContext = st_set_background_context;
 828    functions->GetDriverUuid = st_get_driver_uuid;
 829    functions->GetDeviceUuid = st_get_device_uuid;
 830
 831    /* GL_ARB_get_program_binary */
 832    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 833
 834    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 835       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 836                                PIPE_SHADER_CAP_PREFERRED_IR);
 837    if (preferred_ir == PIPE_SHADER_IR_NIR) {
 838       functions->ShaderCacheSerializeDriverBlob =  st_serialise_nir_program;
 839       functions->ProgramBinarySerializeDriverBlob =
 840          st_serialise_nir_program_binary;
 841       functions->ProgramBinaryDeserializeDriverBlob =
 842          st_deserialise_nir_program;
 843    } else {
 844       functions->ShaderCacheSerializeDriverBlob =  st_serialise_tgsi_program;
 845       functions->ProgramBinarySerializeDriverBlob =
 846          st_serialise_tgsi_program_binary;
 847       functions->ProgramBinaryDeserializeDriverBlob =
 848          st_deserialise_tgsi_program;
 849    }
 850 }
 851
 852
 853 struct st_context *
 854 st_create_context(gl_api api, struct pipe_context *pipe,
 855                   const struct gl_config *visual,
 856                   struct st_context *share,
 857                   const struct st_config_options *options,
 858                   bool no_error)
 859 {
 860    struct gl_context *ctx;
 861    struct gl_context *shareCtx = share ? share->ctx : NULL;
 862    struct dd_function_table funcs;
 863    struct st_context *st;
 864
 865    util_cpu_detect();
 866
 867    memset(&funcs, 0, sizeof(funcs));
 868    st_init_driver_functions(pipe->screen, &funcs);
 869
 870    ctx = calloc(1, sizeof(struct gl_context));
 871    if (!ctx)
 872       return NULL;
 873
 874    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 875       free(ctx);
 876       return NULL;
 877    }
 878
 879    st_debug_init();
 880
 881    if (pipe->screen->get_disk_shader_cache &&
 882        !(ST_DEBUG & DEBUG_TGSI))
 883       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 884
 885    /* XXX: need a capability bit in gallium to query if the pipe
 886     * driver prefers DP4 or MUL/MAD for vertex transformation.
 887     */
 888    if (debug_get_option_mesa_mvp_dp4())
 889       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 890
 891    st = st_create_context_priv(ctx, pipe, options, no_error);
 892    if (!st) {
 893       _mesa_destroy_context(ctx);
 894    }
 895
 896    return st;
 897 }
 898
 899
 900 /**
 901  * When we destroy a context, we must examine all texture objects to
 902  * find/release any sampler views created by that context.
 903  *
 904  * This callback is called per-texture object.  It releases all the
 905  * texture's sampler views which belong to the context.
 906  */
 907 static void
 908 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 909 {
 910    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 911    struct st_context *st = (struct st_context *) userData;
 912
 913    st_texture_release_context_sampler_view(st, st_texture_object(texObj));
 914 }
 915
 916
 917 void
 918 st_destroy_context(struct st_context *st)
 919 {
 920    struct gl_context *ctx = st->ctx;
 921    struct st_framebuffer *stfb, *next;
 922    struct gl_framebuffer *save_drawbuffer;
 923    struct gl_framebuffer *save_readbuffer;
 924
 925    /* Save the current context and draw/read buffers*/
 926    GET_CURRENT_CONTEXT(save_ctx);
 927    if (save_ctx) {
 928       save_drawbuffer = save_ctx->WinSysDrawBuffer;
 929       save_readbuffer = save_ctx->WinSysReadBuffer;
 930    } else {
 931       save_drawbuffer = save_readbuffer = NULL;
 932    }
 933
 934    /*
 935     * We need to bind the context we're deleting so that
 936     * _mesa_reference_texobj_() uses this context when deleting textures.
 937     * Similarly for framebuffer objects, etc.
 938     */
 939    _mesa_make_current(ctx, NULL, NULL);
 940
 941    /* This must be called first so that glthread has a chance to finish */
 942    _mesa_glthread_destroy(ctx);
 943
 944    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 945
 946    /* For the fallback textures, free any sampler views belonging to this
 947     * context.
 948     */
 949    for (unsigned i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 950       struct st_texture_object *stObj =
 951          st_texture_object(ctx->Shared->FallbackTex[i]);
 952       if (stObj) {
 953          st_texture_release_context_sampler_view(st, stObj);
 954       }
 955    }
 956
 957    st_context_free_zombie_objects(st);
 958
 959    mtx_destroy(&st->zombie_sampler_views.mutex);
 960    mtx_destroy(&st->zombie_shaders.mutex);
 961
 962    st_reference_fragprog(st, &st->fp, NULL);
 963    st_reference_prog(st, &st->gp, NULL);
 964    st_reference_vertprog(st, &st->vp, NULL);
 965    st_reference_prog(st, &st->tcp, NULL);
 966    st_reference_prog(st, &st->tep, NULL);
 967    st_reference_compprog(st, &st->cp, NULL);
 968
 969    /* release framebuffer in the winsys buffers list */
 970    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 971       st_framebuffer_reference(&stfb, NULL);
 972    }
 973
 974    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 975    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 976
 977    _vbo_DestroyContext(ctx);
 978
 979    st_destroy_program_variants(st);
 980
 981    _mesa_free_context_data(ctx, false);
 982
 983    /* This will free the st_context too, so 'st' must not be accessed
 984     * afterwards. */
 985    st_destroy_context_priv(st, true);
 986    st = NULL;
 987
 988    /* This must be called after st_destroy_context_priv() to avoid a race
 989     * condition between any shader compiler threads and context destruction.
 990     */
 991    _mesa_destroy_shader_compiler_types();
 992
 993    free(ctx);
 994
 995    if (save_ctx == ctx) {
 996       /* unbind the context we just deleted */
 997       _mesa_make_current(NULL, NULL, NULL);
 998    } else {
 999       /* Restore the current context and draw/read buffers (may be NULL) */
1000       _mesa_make_current(save_ctx, save_drawbuffer, save_readbuffer);
1001    }
1002 }