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