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_shader_cache.h"
  78 #include "st_vdpau.h"
  79 #include "st_texture.h"
  80 #include "pipe/p_context.h"
  81 #include "util/u_inlines.h"
  82 #include "util/u_upload_mgr.h"
  83 #include "util/u_vbuf.h"
  84 #include "cso_cache/cso_context.h"
  85
  86
  87 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  88
  89
  90 /**
  91  * Called via ctx->Driver.Enable()
  92  */
  93 static void
  94 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  95 {
  96    struct st_context *st = st_context(ctx);
  97
  98    switch (cap) {
  99    case GL_DEBUG_OUTPUT:
 100    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 101       st_update_debug_callback(st);
 102       break;
 103    default:
 104       break;
 105    }
 106 }
 107
 108
 109 /**
 110  * Called via ctx->Driver.QueryMemoryInfo()
 111  */
 112 static void
 113 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 114 {
 115    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 116    struct pipe_memory_info info;
 117
 118    assert(screen->query_memory_info);
 119    if (!screen->query_memory_info)
 120       return;
 121
 122    screen->query_memory_info(screen, &info);
 123
 124    out->total_device_memory = info.total_device_memory;
 125    out->avail_device_memory = info.avail_device_memory;
 126    out->total_staging_memory = info.total_staging_memory;
 127    out->avail_staging_memory = info.avail_staging_memory;
 128    out->device_memory_evicted = info.device_memory_evicted;
 129    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 130 }
 131
 132
 133 uint64_t
 134 st_get_active_states(struct gl_context *ctx)
 135 {
 136    struct st_vertex_program *vp =
 137       st_vertex_program(ctx->VertexProgram._Current);
 138    struct st_common_program *tcp =
 139       st_common_program(ctx->TessCtrlProgram._Current);
 140    struct st_common_program *tep =
 141       st_common_program(ctx->TessEvalProgram._Current);
 142    struct st_common_program *gp =
 143       st_common_program(ctx->GeometryProgram._Current);
 144    struct st_fragment_program *fp =
 145       st_fragment_program(ctx->FragmentProgram._Current);
 146    struct st_compute_program *cp =
 147       st_compute_program(ctx->ComputeProgram._Current);
 148    uint64_t active_shader_states = 0;
 149
 150    if (vp)
 151       active_shader_states |= vp->affected_states;
 152    if (tcp)
 153       active_shader_states |= tcp->affected_states;
 154    if (tep)
 155       active_shader_states |= tep->affected_states;
 156    if (gp)
 157       active_shader_states |= gp->affected_states;
 158    if (fp)
 159       active_shader_states |= fp->affected_states;
 160    if (cp)
 161       active_shader_states |= cp->affected_states;
 162
 163    /* Mark non-shader-resource shader states as "always active". */
 164    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 165 }
 166
 167
 168 void
 169 st_invalidate_buffers(struct st_context *st)
 170 {
 171    st->dirty |= ST_NEW_BLEND |
 172                 ST_NEW_DSA |
 173                 ST_NEW_FB_STATE |
 174                 ST_NEW_SAMPLE_MASK |
 175                 ST_NEW_SAMPLE_SHADING |
 176                 ST_NEW_FS_STATE |
 177                 ST_NEW_POLY_STIPPLE |
 178                 ST_NEW_VIEWPORT |
 179                 ST_NEW_RASTERIZER |
 180                 ST_NEW_SCISSOR |
 181                 ST_NEW_WINDOW_RECTANGLES;
 182 }
 183
 184
 185 /**
 186  * Called via ctx->Driver.UpdateState()
 187  */
 188 static void
 189 st_invalidate_state(struct gl_context *ctx)
 190 {
 191    GLbitfield new_state = ctx->NewState;
 192    struct st_context *st = st_context(ctx);
 193
 194    if (new_state & _NEW_BUFFERS) {
 195       st_invalidate_buffers(st);
 196    } else {
 197       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 198        * check them when _NEW_BUFFERS isn't set.
 199        */
 200       if (new_state & _NEW_PROGRAM)
 201          st->dirty |= ST_NEW_RASTERIZER;
 202
 203       if (new_state & _NEW_FOG)
 204          st->dirty |= ST_NEW_FS_STATE;
 205
 206       if (new_state & _NEW_FRAG_CLAMP) {
 207          if (st->clamp_frag_color_in_shader)
 208             st->dirty |= ST_NEW_FS_STATE;
 209          else
 210             st->dirty |= ST_NEW_RASTERIZER;
 211       }
 212    }
 213
 214    if (new_state & (_NEW_LIGHT |
 215                     _NEW_POINT))
 216       st->dirty |= ST_NEW_RASTERIZER;
 217
 218    if (new_state & _NEW_PROJECTION &&
 219        st_user_clip_planes_enabled(ctx))
 220       st->dirty |= ST_NEW_CLIP_STATE;
 221
 222    if (new_state & _NEW_PIXEL)
 223       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 224
 225    if (new_state & _NEW_CURRENT_ATTRIB)
 226       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 227
 228    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 229    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 230       st->dirty |= ST_NEW_VS_STATE;
 231
 232    /* Which shaders are dirty will be determined manually. */
 233    if (new_state & _NEW_PROGRAM) {
 234       st->gfx_shaders_may_be_dirty = true;
 235       st->compute_shader_may_be_dirty = true;
 236       /* This will mask out unused shader resources. */
 237       st->active_states = st_get_active_states(ctx);
 238    }
 239
 240    if (new_state & _NEW_TEXTURE_OBJECT) {
 241       st->dirty |= st->active_states &
 242                    (ST_NEW_SAMPLER_VIEWS |
 243                     ST_NEW_SAMPLERS |
 244                     ST_NEW_IMAGE_UNITS);
 245       if (ctx->FragmentProgram._Current &&
 246           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 247          st->dirty |= ST_NEW_FS_STATE;
 248       }
 249    }
 250 }
 251
 252
 253 static void
 254 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 255 {
 256    uint shader, i;
 257
 258    st_destroy_atoms(st);
 259    st_destroy_draw(st);
 260    st_destroy_clear(st);
 261    st_destroy_bitmap(st);
 262    st_destroy_drawpix(st);
 263    st_destroy_drawtex(st);
 264    st_destroy_perfmon(st);
 265    st_destroy_pbo_helpers(st);
 266    st_destroy_bound_texture_handles(st);
 267    st_destroy_bound_image_handles(st);
 268
 269    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
 270       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
 271          pipe_sampler_view_release(st->pipe,
 272                                    &st->state.sampler_views[shader][i]);
 273       }
 274    }
 275
 276    /* free glReadPixels cache data */
 277    st_invalidate_readpix_cache(st);
 278
 279    cso_destroy_context(st->cso_context);
 280
 281    if (st->pipe && destroy_pipe)
 282       st->pipe->destroy(st->pipe);
 283
 284    free(st);
 285 }
 286
 287
 288 static void
 289 st_init_driver_flags(struct st_context *st)
 290 {
 291    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 292
 293    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 294    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 295    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 296    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 297    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 298
 299    /* Shader resources */
 300    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 301    if (st->has_hw_atomics)
 302       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS | ST_NEW_CS_ATOMICS;
 303    else
 304       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 305    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 306    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 307
 308    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 309    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 310    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 311    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 312    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 313    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 314
 315    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 316    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 317    f->NewScissorRect = ST_NEW_SCISSOR;
 318    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 319    f->NewAlphaTest = ST_NEW_DSA;
 320    f->NewBlend = ST_NEW_BLEND;
 321    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 322    f->NewColorMask = ST_NEW_BLEND;
 323    f->NewDepth = ST_NEW_DSA;
 324    f->NewLogicOp = ST_NEW_BLEND;
 325    f->NewStencil = ST_NEW_DSA;
 326    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 327                              ST_NEW_SAMPLE_MASK | ST_NEW_SAMPLE_SHADING;
 328    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 329    f->NewSampleMask = ST_NEW_SAMPLE_MASK;
 330    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 331
 332    /* This depends on what the gallium driver wants. */
 333    if (st->force_persample_in_shader) {
 334       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 335       f->NewSampleShading |= ST_NEW_FS_STATE;
 336    } else {
 337       f->NewSampleShading |= ST_NEW_RASTERIZER;
 338    }
 339
 340    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 341    f->NewClipPlane = ST_NEW_CLIP_STATE;
 342    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 343    f->NewDepthClamp = ST_NEW_RASTERIZER;
 344    f->NewLineState = ST_NEW_RASTERIZER;
 345    f->NewPolygonState = ST_NEW_RASTERIZER;
 346    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 347    f->NewViewport = ST_NEW_VIEWPORT;
 348 }
 349
 350
 351 static struct st_context *
 352 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 353                        const struct st_config_options *options, bool no_error)
 354 {
 355    struct pipe_screen *screen = pipe->screen;
 356    uint i;
 357    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 358
 359    st->options = *options;
 360
 361    ctx->st = st;
 362
 363    st->ctx = ctx;
 364    st->pipe = pipe;
 365
 366    /* state tracker needs the VBO module */
 367    _vbo_CreateContext(ctx);
 368
 369    st->dirty = ST_ALL_STATES_MASK;
 370
 371    st->can_bind_const_buffer_as_vertex =
 372       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 373
 374    /* st/mesa always uploads zero-stride vertex attribs, and other user
 375     * vertex buffers are only possible with a compatibility profile.
 376     * So tell the u_vbuf module that user VBOs are not possible with the Core
 377     * profile, so that u_vbuf is bypassed completely if there is nothing else
 378     * to do.
 379     */
 380    unsigned vbuf_flags =
 381       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 382    st->cso_context = cso_create_context(pipe, vbuf_flags);
 383
 384    st_init_atoms(st);
 385    st_init_clear(st);
 386    st_init_draw(st);
 387    st_init_pbo_helpers(st);
 388
 389    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 390    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 391       st->internal_target = PIPE_TEXTURE_2D;
 392    else
 393       st->internal_target = PIPE_TEXTURE_RECT;
 394
 395    /* Setup vertex element info for 'struct st_util_vertex'.
 396     */
 397    {
 398       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 399
 400       /* If this assertion ever fails all state tracker calls to
 401        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 402        * particular call would have to be moved to just before each
 403        * drawing call.
 404        */
 405       assert(slot == 0);
 406
 407       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 408
 409       memset(&st->util_velems, 0, sizeof(st->util_velems));
 410       st->util_velems[0].src_offset = 0;
 411       st->util_velems[0].vertex_buffer_index = slot;
 412       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 413       st->util_velems[1].src_offset = 3 * sizeof(float);
 414       st->util_velems[1].vertex_buffer_index = slot;
 415       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 416       st->util_velems[2].src_offset = 7 * sizeof(float);
 417       st->util_velems[2].vertex_buffer_index = slot;
 418       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 419    }
 420
 421    /* we want all vertex data to be placed in buffer objects */
 422    vbo_use_buffer_objects(ctx);
 423
 424
 425    /* make sure that no VBOs are left mapped when we're drawing. */
 426    vbo_always_unmap_buffers(ctx);
 427
 428    /* Need these flags:
 429     */
 430    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 431
 432    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 433
 434    if (no_error)
 435       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 436
 437    st->has_stencil_export =
 438       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 439    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 440    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 441                                               PIPE_TEXTURE_2D, 0,
 442                                               PIPE_BIND_SAMPLER_VIEW);
 443    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 444                                               PIPE_TEXTURE_2D, 0,
 445                                               PIPE_BIND_SAMPLER_VIEW);
 446    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 447                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 448    st->force_persample_in_shader =
 449       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 450       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 451    st->has_shareable_shaders = screen->get_param(screen,
 452                                                  PIPE_CAP_SHAREABLE_SHADERS);
 453    st->needs_texcoord_semantic =
 454       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 455    st->apply_texture_swizzle_to_border_color =
 456       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 457          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 458           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 459    st->has_time_elapsed =
 460       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 461    st->has_half_float_packing =
 462       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 463    st->has_multi_draw_indirect =
 464       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 465
 466    st->has_hw_atomics =
 467       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 468                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 469       ? true : false;
 470
 471    /* GL limits and extensions */
 472    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 473    st_init_extensions(pipe->screen, &ctx->Const,
 474                       &ctx->Extensions, &st->options, ctx->API);
 475
 476    if (st_have_perfmon(st)) {
 477       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 478    }
 479
 480    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 481    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 482       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 483          st->clamp_vert_color_in_shader = GL_TRUE;
 484       }
 485
 486       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 487          st->clamp_frag_color_in_shader = GL_TRUE;
 488       }
 489
 490       /* For drivers which cannot do color clamping, it's better to just
 491        * disable ARB_color_buffer_float in the core profile, because
 492        * the clamping is deprecated there anyway. */
 493       if (ctx->API == API_OPENGL_CORE &&
 494           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 495          st->clamp_vert_color_in_shader = GL_FALSE;
 496          st->clamp_frag_color_in_shader = GL_FALSE;
 497          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 498       }
 499    }
 500
 501    /* called after _mesa_create_context/_mesa_init_point, fix default user
 502     * settable max point size up
 503     */
 504    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 505                              ctx->Const.MaxPointSizeAA);
 506    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 507     * is not supported
 508     */
 509    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 510       !st->has_shader_model3;
 511
 512    if (!ctx->Extensions.ARB_gpu_shader5) {
 513       for (i = 0; i < MESA_SHADER_STAGES; i++)
 514          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 515    }
 516
 517    /* Set which shader types can be compiled at link time. */
 518    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 519          st->has_shareable_shaders &&
 520          !st->clamp_vert_color_in_shader;
 521
 522    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 523          st->has_shareable_shaders &&
 524          !st->clamp_frag_color_in_shader &&
 525          !st->force_persample_in_shader;
 526
 527    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 528    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 529    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 530    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 531
 532    st->bitmap.cache.empty = true;
 533
 534    _mesa_override_extensions(ctx);
 535    _mesa_compute_version(ctx);
 536
 537    if (ctx->Version == 0) {
 538       /* This can happen when a core profile was requested, but the driver
 539        * does not support some features of GL 3.1 or later.
 540        */
 541       st_destroy_context_priv(st, false);
 542       return NULL;
 543    }
 544
 545    _mesa_initialize_dispatch_tables(ctx);
 546    _mesa_initialize_vbo_vtxfmt(ctx);
 547    st_init_driver_flags(st);
 548
 549    /* Initialize context's winsys buffers list */
 550    LIST_INITHEAD(&st->winsys_buffers);
 551
 552    return st;
 553 }
 554
 555
 556 struct st_context *
 557 st_create_context(gl_api api, struct pipe_context *pipe,
 558                   const struct gl_config *visual,
 559                   struct st_context *share,
 560                   const struct st_config_options *options,
 561                   bool no_error)
 562 {
 563    struct gl_context *ctx;
 564    struct gl_context *shareCtx = share ? share->ctx : NULL;
 565    struct dd_function_table funcs;
 566    struct st_context *st;
 567
 568    memset(&funcs, 0, sizeof(funcs));
 569    st_init_driver_functions(pipe->screen, &funcs);
 570
 571    ctx = calloc(1, sizeof(struct gl_context));
 572    if (!ctx)
 573       return NULL;
 574
 575    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 576       free(ctx);
 577       return NULL;
 578    }
 579
 580    st_debug_init();
 581
 582    if (pipe->screen->get_disk_shader_cache &&
 583        !(ST_DEBUG & DEBUG_TGSI))
 584       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 585
 586    /* XXX: need a capability bit in gallium to query if the pipe
 587     * driver prefers DP4 or MUL/MAD for vertex transformation.
 588     */
 589    if (debug_get_option_mesa_mvp_dp4())
 590       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 591
 592    st = st_create_context_priv(ctx, pipe, options, no_error);
 593    if (!st) {
 594       _mesa_destroy_context(ctx);
 595    }
 596
 597    return st;
 598 }
 599
 600
 601 /**
 602  * Callback to release the sampler view attached to a texture object.
 603  * Called by _mesa_HashWalk().
 604  */
 605 static void
 606 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 607 {
 608    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 609    struct st_context *st = (struct st_context *) userData;
 610
 611    st_texture_release_sampler_view(st, st_texture_object(texObj));
 612 }
 613
 614
 615 void
 616 st_destroy_context(struct st_context *st)
 617 {
 618    struct gl_context *ctx = st->ctx;
 619    struct st_framebuffer *stfb, *next;
 620
 621    GET_CURRENT_CONTEXT(curctx);
 622
 623    if (curctx == NULL) {
 624       /* No current context, but we need one to release
 625        * renderbuffer surface when we release framebuffer.
 626        * So temporarily bind the context.
 627        */
 628       _mesa_make_current(ctx, NULL, NULL);
 629    }
 630
 631    /* This must be called first so that glthread has a chance to finish */
 632    _mesa_glthread_destroy(ctx);
 633
 634    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 635
 636    st_reference_fragprog(st, &st->fp, NULL);
 637    st_reference_prog(st, &st->gp, NULL);
 638    st_reference_vertprog(st, &st->vp, NULL);
 639    st_reference_prog(st, &st->tcp, NULL);
 640    st_reference_prog(st, &st->tep, NULL);
 641    st_reference_compprog(st, &st->cp, NULL);
 642
 643    /* release framebuffer in the winsys buffers list */
 644    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 645       st_framebuffer_reference(&stfb, NULL);
 646    }
 647
 648    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 649    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 650
 651    _vbo_DestroyContext(ctx);
 652
 653    st_destroy_program_variants(st);
 654
 655    _mesa_free_context_data(ctx);
 656
 657    /* This will free the st_context too, so 'st' must not be accessed
 658     * afterwards. */
 659    st_destroy_context_priv(st, true);
 660    st = NULL;
 661
 662    free(ctx);
 663 }
 664
 665
 666 static void
 667 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 668 {
 669    struct st_context *st = ctx->st;
 670    st->pipe->emit_string_marker(st->pipe, string, len);
 671 }
 672
 673
 674 static void
 675 st_set_background_context(struct gl_context *ctx,
 676                           struct util_queue_monitoring *queue_info)
 677 {
 678    struct st_context *st = ctx->st;
 679    struct st_manager *smapi =
 680       (struct st_manager *) st->iface.st_context_private;
 681
 682    assert(smapi->set_background_context);
 683    smapi->set_background_context(&st->iface, queue_info);
 684 }
 685
 686
 687 static void
 688 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 689 {
 690    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 691
 692    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 693    memset(uuid, 0, GL_UUID_SIZE_EXT);
 694    screen->get_device_uuid(screen, uuid);
 695 }
 696
 697
 698 static void
 699 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 700 {
 701    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 702
 703    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 704    memset(uuid, 0, GL_UUID_SIZE_EXT);
 705    screen->get_driver_uuid(screen, uuid);
 706 }
 707
 708
 709 void
 710 st_init_driver_functions(struct pipe_screen *screen,
 711                          struct dd_function_table *functions)
 712 {
 713    _mesa_init_shader_object_functions(functions);
 714    _mesa_init_sampler_object_functions(functions);
 715
 716    st_init_blit_functions(functions);
 717    st_init_bufferobject_functions(screen, functions);
 718    st_init_clear_functions(functions);
 719    st_init_bitmap_functions(functions);
 720    st_init_copy_image_functions(functions);
 721    st_init_drawpixels_functions(functions);
 722    st_init_rasterpos_functions(functions);
 723
 724    st_init_drawtex_functions(functions);
 725
 726    st_init_eglimage_functions(functions);
 727
 728    st_init_fbo_functions(functions);
 729    st_init_feedback_functions(functions);
 730    st_init_memoryobject_functions(functions);
 731    st_init_msaa_functions(functions);
 732    st_init_perfmon_functions(functions);
 733    st_init_program_functions(functions);
 734    st_init_query_functions(functions);
 735    st_init_cond_render_functions(functions);
 736    st_init_readpixels_functions(functions);
 737    st_init_texture_functions(functions);
 738    st_init_texture_barrier_functions(functions);
 739    st_init_flush_functions(screen, functions);
 740    st_init_string_functions(functions);
 741    st_init_viewport_functions(functions);
 742    st_init_compute_functions(functions);
 743
 744    st_init_xformfb_functions(functions);
 745    st_init_syncobj_functions(functions);
 746
 747    st_init_vdpau_functions(functions);
 748
 749    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 750       functions->EmitStringMarker = st_emit_string_marker;
 751
 752    functions->Enable = st_Enable;
 753    functions->UpdateState = st_invalidate_state;
 754    functions->QueryMemoryInfo = st_query_memory_info;
 755    functions->SetBackgroundContext = st_set_background_context;
 756    functions->GetDriverUuid = st_get_driver_uuid;
 757    functions->GetDeviceUuid = st_get_device_uuid;
 758
 759    /* GL_ARB_get_program_binary */
 760    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 761    functions->ProgramBinarySerializeDriverBlob = st_serialise_tgsi_program;
 762    functions->ProgramBinaryDeserializeDriverBlob = st_deserialise_tgsi_program;
 763 }