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 static void st_init_driver_flags(struct st_context *st);
 290
 291 static struct st_context *
 292 st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
 293                 const struct st_config_options *options, bool no_error)
 294 {
 295    struct pipe_screen *screen = pipe->screen;
 296    uint i;
 297    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 298
 299    st->options = *options;
 300
 301    ctx->st = st;
 302
 303    st->ctx = ctx;
 304    st->pipe = pipe;
 305
 306    /* state tracker needs the VBO module */
 307    _vbo_CreateContext(ctx);
 308
 309    st->dirty = ST_ALL_STATES_MASK;
 310
 311    st->has_user_constbuf =
 312       screen->get_param(screen, PIPE_CAP_USER_CONSTANT_BUFFERS);
 313    st->can_bind_const_buffer_as_vertex =
 314       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 315
 316    /* st/mesa always uploads zero-stride vertex attribs, and other user
 317     * vertex buffers are only possible with a compatibility profile.
 318     * So tell the u_vbuf module that user VBOs are not possible with the Core
 319     * profile, so that u_vbuf is bypassed completely if there is nothing else
 320     * to do.
 321     */
 322    unsigned vbuf_flags =
 323       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 324    st->cso_context = cso_create_context(pipe, vbuf_flags);
 325
 326    st_init_atoms( st );
 327    st_init_clear(st);
 328    st_init_draw( st );
 329    st_init_pbo_helpers(st);
 330
 331    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 332    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 333       st->internal_target = PIPE_TEXTURE_2D;
 334    else
 335       st->internal_target = PIPE_TEXTURE_RECT;
 336
 337    /* Setup vertex element info for 'struct st_util_vertex'.
 338     */
 339    {
 340       const unsigned slot = cso_get_aux_vertex_buffer_slot(st->cso_context);
 341
 342       /* If this assertion ever fails all state tracker calls to
 343        * cso_get_aux_vertex_buffer_slot() should be audited.  This
 344        * particular call would have to be moved to just before each
 345        * drawing call.
 346        */
 347       assert(slot == 0);
 348
 349       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 350
 351       memset(&st->util_velems, 0, sizeof(st->util_velems));
 352       st->util_velems[0].src_offset = 0;
 353       st->util_velems[0].vertex_buffer_index = slot;
 354       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 355       st->util_velems[1].src_offset = 3 * sizeof(float);
 356       st->util_velems[1].vertex_buffer_index = slot;
 357       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 358       st->util_velems[2].src_offset = 7 * sizeof(float);
 359       st->util_velems[2].vertex_buffer_index = slot;
 360       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 361    }
 362
 363    /* we want all vertex data to be placed in buffer objects */
 364    vbo_use_buffer_objects(ctx);
 365
 366
 367    /* make sure that no VBOs are left mapped when we're drawing. */
 368    vbo_always_unmap_buffers(ctx);
 369
 370    /* Need these flags:
 371     */
 372    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 373
 374    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 375
 376    if (no_error)
 377       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 378
 379    st->has_stencil_export =
 380       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 381    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 382    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 383                                               PIPE_TEXTURE_2D, 0,
 384                                               PIPE_BIND_SAMPLER_VIEW);
 385    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 386                                               PIPE_TEXTURE_2D, 0,
 387                                               PIPE_BIND_SAMPLER_VIEW);
 388    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 389                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 390    st->force_persample_in_shader =
 391       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 392       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 393    st->has_shareable_shaders = screen->get_param(screen,
 394                                                  PIPE_CAP_SHAREABLE_SHADERS);
 395    st->needs_texcoord_semantic =
 396       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 397    st->apply_texture_swizzle_to_border_color =
 398       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 399          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 400           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 401    st->has_time_elapsed =
 402       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 403    st->has_half_float_packing =
 404       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 405    st->has_multi_draw_indirect =
 406       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 407
 408    st->has_hw_atomics =
 409       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 410                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS) ? true : false;
 411
 412    /* GL limits and extensions */
 413    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
 414    st_init_extensions(pipe->screen, &ctx->Const,
 415                       &ctx->Extensions, &st->options, ctx->API);
 416
 417    if (st_have_perfmon(st)) {
 418       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 419    }
 420
 421    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 422    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 423       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 424          st->clamp_vert_color_in_shader = GL_TRUE;
 425       }
 426
 427       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 428          st->clamp_frag_color_in_shader = GL_TRUE;
 429       }
 430
 431       /* For drivers which cannot do color clamping, it's better to just
 432        * disable ARB_color_buffer_float in the core profile, because
 433        * the clamping is deprecated there anyway. */
 434       if (ctx->API == API_OPENGL_CORE &&
 435           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 436          st->clamp_vert_color_in_shader = GL_FALSE;
 437          st->clamp_frag_color_in_shader = GL_FALSE;
 438          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 439       }
 440    }
 441
 442    /* called after _mesa_create_context/_mesa_init_point, fix default user
 443     * settable max point size up
 444     */
 445    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 446                              ctx->Const.MaxPointSizeAA);
 447    /* For vertex shaders, make sure not to emit saturate when SM 3.0 is not supported */
 448    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat = !st->has_shader_model3;
 449
 450    if (!ctx->Extensions.ARB_gpu_shader5) {
 451       for (i = 0; i < MESA_SHADER_STAGES; i++)
 452          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 453    }
 454
 455    /* Set which shader types can be compiled at link time. */
 456    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 457          st->has_shareable_shaders &&
 458          !st->clamp_vert_color_in_shader;
 459
 460    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 461          st->has_shareable_shaders &&
 462          !st->clamp_frag_color_in_shader &&
 463          !st->force_persample_in_shader;
 464
 465    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 466    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 467    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 468    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 469
 470    st->bitmap.cache.empty = true;
 471
 472    _mesa_compute_version(ctx);
 473
 474    if (ctx->Version == 0) {
 475       /* This can happen when a core profile was requested, but the driver
 476        * does not support some features of GL 3.1 or later.
 477        */
 478       st_destroy_context_priv(st, false);
 479       return NULL;
 480    }
 481
 482    _mesa_initialize_dispatch_tables(ctx);
 483    _mesa_initialize_vbo_vtxfmt(ctx);
 484    st_init_driver_flags(st);
 485
 486    /* Initialize context's winsys buffers list */
 487    LIST_INITHEAD(&st->winsys_buffers);
 488
 489    return st;
 490 }
 491
 492 static void st_init_driver_flags(struct st_context *st)
 493 {
 494    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 495
 496    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 497    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 498    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 499    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 500    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 501
 502    /* Shader resources */
 503    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 504    if (st->has_hw_atomics)
 505       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS;
 506    else
 507       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 508    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 509    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 510
 511    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 512    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 513    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 514    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 515    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 516    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 517
 518    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 519    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 520    f->NewScissorRect = ST_NEW_SCISSOR;
 521    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 522    f->NewAlphaTest = ST_NEW_DSA;
 523    f->NewBlend = ST_NEW_BLEND;
 524    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 525    f->NewColorMask = ST_NEW_BLEND;
 526    f->NewDepth = ST_NEW_DSA;
 527    f->NewLogicOp = ST_NEW_BLEND;
 528    f->NewStencil = ST_NEW_DSA;
 529    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 530                              ST_NEW_SAMPLE_MASK | ST_NEW_SAMPLE_SHADING;
 531    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 532    f->NewSampleMask = ST_NEW_SAMPLE_MASK;
 533    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 534
 535    /* This depends on what the gallium driver wants. */
 536    if (st->force_persample_in_shader) {
 537       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 538       f->NewSampleShading |= ST_NEW_FS_STATE;
 539    } else {
 540       f->NewSampleShading |= ST_NEW_RASTERIZER;
 541    }
 542
 543    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 544    f->NewClipPlane = ST_NEW_CLIP_STATE;
 545    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 546    f->NewDepthClamp = ST_NEW_RASTERIZER;
 547    f->NewLineState = ST_NEW_RASTERIZER;
 548    f->NewPolygonState = ST_NEW_RASTERIZER;
 549    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 550    f->NewViewport = ST_NEW_VIEWPORT;
 551 }
 552
 553 struct st_context *st_create_context(gl_api api, struct pipe_context *pipe,
 554                                      const struct gl_config *visual,
 555                                      struct st_context *share,
 556                                      const struct st_config_options *options,
 557                                      bool no_error)
 558 {
 559    struct gl_context *ctx;
 560    struct gl_context *shareCtx = share ? share->ctx : NULL;
 561    struct dd_function_table funcs;
 562    struct st_context *st;
 563
 564    memset(&funcs, 0, sizeof(funcs));
 565    st_init_driver_functions(pipe->screen, &funcs);
 566
 567    ctx = calloc(1, sizeof(struct gl_context));
 568    if (!ctx)
 569       return NULL;
 570
 571    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 572       free(ctx);
 573       return NULL;
 574    }
 575
 576    st_debug_init();
 577
 578    if (pipe->screen->get_disk_shader_cache &&
 579        !(ST_DEBUG & DEBUG_TGSI))
 580       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 581
 582    /* XXX: need a capability bit in gallium to query if the pipe
 583     * driver prefers DP4 or MUL/MAD for vertex transformation.
 584     */
 585    if (debug_get_option_mesa_mvp_dp4())
 586       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 587
 588    st = st_create_context_priv(ctx, pipe, options, no_error);
 589    if (!st) {
 590       _mesa_destroy_context(ctx);
 591    }
 592
 593    return st;
 594 }
 595
 596
 597 /**
 598  * Callback to release the sampler view attached to a texture object.
 599  * Called by _mesa_HashWalk().
 600  */
 601 static void
 602 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 603 {
 604    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 605    struct st_context *st = (struct st_context *) userData;
 606
 607    st_texture_release_sampler_view(st, st_texture_object(texObj));
 608 }
 609
 610 void st_destroy_context( struct st_context *st )
 611 {
 612    struct gl_context *ctx = st->ctx;
 613    struct st_framebuffer *stfb, *next;
 614
 615    GET_CURRENT_CONTEXT(curctx);
 616    if (curctx == NULL) {
 617
 618       /* No current context, but we need one to release
 619        * renderbuffer surface when we release framebuffer.
 620        * So temporarily bind the context.
 621        */
 622       _mesa_make_current(ctx, NULL, NULL);
 623    }
 624
 625    /* This must be called first so that glthread has a chance to finish */
 626    _mesa_glthread_destroy(ctx);
 627
 628    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 629
 630    st_reference_fragprog(st, &st->fp, NULL);
 631    st_reference_prog(st, &st->gp, NULL);
 632    st_reference_vertprog(st, &st->vp, NULL);
 633    st_reference_prog(st, &st->tcp, NULL);
 634    st_reference_prog(st, &st->tep, NULL);
 635    st_reference_compprog(st, &st->cp, NULL);
 636
 637    /* release framebuffer in the winsys buffers list */
 638    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 639       st_framebuffer_reference(&stfb, NULL);
 640    }
 641
 642    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 643    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 644
 645    _vbo_DestroyContext(ctx);
 646
 647    st_destroy_program_variants(st);
 648
 649    _mesa_free_context_data(ctx);
 650
 651    /* This will free the st_context too, so 'st' must not be accessed
 652     * afterwards. */
 653    st_destroy_context_priv(st, true);
 654    st = NULL;
 655
 656    free(ctx);
 657 }
 658
 659 static void
 660 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 661 {
 662    struct st_context *st = ctx->st;
 663    st->pipe->emit_string_marker(st->pipe, string, len);
 664 }
 665
 666 static void
 667 st_set_background_context(struct gl_context *ctx,
 668                           struct util_queue_monitoring *queue_info)
 669 {
 670    struct st_context *st = ctx->st;
 671    struct st_manager *smapi =
 672       (struct st_manager*)st->iface.st_context_private;
 673
 674    assert(smapi->set_background_context);
 675    smapi->set_background_context(&st->iface, queue_info);
 676 }
 677
 678 static void
 679 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 680 {
 681    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 682
 683    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 684    memset(uuid, 0, GL_UUID_SIZE_EXT);
 685    screen->get_device_uuid(screen, uuid);
 686 }
 687
 688 static void
 689 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 690 {
 691    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 692
 693    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 694    memset(uuid, 0, GL_UUID_SIZE_EXT);
 695    screen->get_driver_uuid(screen, uuid);
 696 }
 697
 698 void st_init_driver_functions(struct pipe_screen *screen,
 699                               struct dd_function_table *functions)
 700 {
 701    _mesa_init_shader_object_functions(functions);
 702    _mesa_init_sampler_object_functions(functions);
 703
 704    st_init_blit_functions(functions);
 705    st_init_bufferobject_functions(screen, functions);
 706    st_init_clear_functions(functions);
 707    st_init_bitmap_functions(functions);
 708    st_init_copy_image_functions(functions);
 709    st_init_drawpixels_functions(functions);
 710    st_init_rasterpos_functions(functions);
 711
 712    st_init_drawtex_functions(functions);
 713
 714    st_init_eglimage_functions(functions);
 715
 716    st_init_fbo_functions(functions);
 717    st_init_feedback_functions(functions);
 718    st_init_memoryobject_functions(functions);
 719    st_init_msaa_functions(functions);
 720    st_init_perfmon_functions(functions);
 721    st_init_program_functions(functions);
 722    st_init_query_functions(functions);
 723    st_init_cond_render_functions(functions);
 724    st_init_readpixels_functions(functions);
 725    st_init_texture_functions(functions);
 726    st_init_texture_barrier_functions(functions);
 727    st_init_flush_functions(screen, functions);
 728    st_init_string_functions(functions);
 729    st_init_viewport_functions(functions);
 730    st_init_compute_functions(functions);
 731
 732    st_init_xformfb_functions(functions);
 733    st_init_syncobj_functions(functions);
 734
 735    st_init_vdpau_functions(functions);
 736
 737    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 738       functions->EmitStringMarker = st_emit_string_marker;
 739
 740    functions->Enable = st_Enable;
 741    functions->UpdateState = st_invalidate_state;
 742    functions->QueryMemoryInfo = st_query_memory_info;
 743    functions->SetBackgroundContext = st_set_background_context;
 744    functions->GetDriverUuid = st_get_device_uuid;
 745    functions->GetDeviceUuid = st_get_driver_uuid;
 746 }