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
  89
  90 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  91
  92
  93 /**
  94  * Called via ctx->Driver.Enable()
  95  */
  96 static void
  97 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  98 {
  99    struct st_context *st = st_context(ctx);
 100
 101    switch (cap) {
 102    case GL_DEBUG_OUTPUT:
 103    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 104       st_update_debug_callback(st);
 105       break;
 106    default:
 107       break;
 108    }
 109 }
 110
 111
 112 /**
 113  * Called via ctx->Driver.QueryMemoryInfo()
 114  */
 115 static void
 116 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 117 {
 118    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 119    struct pipe_memory_info info;
 120
 121    assert(screen->query_memory_info);
 122    if (!screen->query_memory_info)
 123       return;
 124
 125    screen->query_memory_info(screen, &info);
 126
 127    out->total_device_memory = info.total_device_memory;
 128    out->avail_device_memory = info.avail_device_memory;
 129    out->total_staging_memory = info.total_staging_memory;
 130    out->avail_staging_memory = info.avail_staging_memory;
 131    out->device_memory_evicted = info.device_memory_evicted;
 132    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 133 }
 134
 135
 136 static uint64_t
 137 st_get_active_states(struct gl_context *ctx)
 138 {
 139    struct st_vertex_program *vp =
 140       st_vertex_program(ctx->VertexProgram._Current);
 141    struct st_common_program *tcp =
 142       st_common_program(ctx->TessCtrlProgram._Current);
 143    struct st_common_program *tep =
 144       st_common_program(ctx->TessEvalProgram._Current);
 145    struct st_common_program *gp =
 146       st_common_program(ctx->GeometryProgram._Current);
 147    struct st_fragment_program *fp =
 148       st_fragment_program(ctx->FragmentProgram._Current);
 149    struct st_compute_program *cp =
 150       st_compute_program(ctx->ComputeProgram._Current);
 151    uint64_t active_shader_states = 0;
 152
 153    if (vp)
 154       active_shader_states |= vp->affected_states;
 155    if (tcp)
 156       active_shader_states |= tcp->affected_states;
 157    if (tep)
 158       active_shader_states |= tep->affected_states;
 159    if (gp)
 160       active_shader_states |= gp->affected_states;
 161    if (fp)
 162       active_shader_states |= fp->affected_states;
 163    if (cp)
 164       active_shader_states |= cp->affected_states;
 165
 166    /* Mark non-shader-resource shader states as "always active". */
 167    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 168 }
 169
 170
 171 void
 172 st_invalidate_buffers(struct st_context *st)
 173 {
 174    st->dirty |= ST_NEW_BLEND |
 175                 ST_NEW_DSA |
 176                 ST_NEW_FB_STATE |
 177                 ST_NEW_SAMPLE_STATE |
 178                 ST_NEW_SAMPLE_SHADING |
 179                 ST_NEW_FS_STATE |
 180                 ST_NEW_POLY_STIPPLE |
 181                 ST_NEW_VIEWPORT |
 182                 ST_NEW_RASTERIZER |
 183                 ST_NEW_SCISSOR |
 184                 ST_NEW_WINDOW_RECTANGLES;
 185 }
 186
 187
 188 static inline bool
 189 st_vp_uses_current_values(const struct gl_context *ctx)
 190 {
 191    const uint64_t inputs = ctx->VertexProgram._Current->info.inputs_read;
 192    return _mesa_draw_current_bits(ctx) & inputs;
 193 }
 194
 195
 196 /**
 197  * Called via ctx->Driver.UpdateState()
 198  */
 199 static void
 200 st_invalidate_state(struct gl_context *ctx)
 201 {
 202    GLbitfield new_state = ctx->NewState;
 203    struct st_context *st = st_context(ctx);
 204
 205    if (new_state & _NEW_BUFFERS) {
 206       st_invalidate_buffers(st);
 207    } else {
 208       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 209        * check them when _NEW_BUFFERS isn't set.
 210        */
 211       if (new_state & _NEW_PROGRAM)
 212          st->dirty |= ST_NEW_RASTERIZER;
 213
 214       if (new_state & _NEW_FOG)
 215          st->dirty |= ST_NEW_FS_STATE;
 216
 217       if (new_state & _NEW_FRAG_CLAMP) {
 218          if (st->clamp_frag_color_in_shader)
 219             st->dirty |= ST_NEW_FS_STATE;
 220          else
 221             st->dirty |= ST_NEW_RASTERIZER;
 222       }
 223    }
 224
 225    if (new_state & (_NEW_LIGHT |
 226                     _NEW_POINT))
 227       st->dirty |= ST_NEW_RASTERIZER;
 228
 229    if (new_state & _NEW_PROJECTION &&
 230        st_user_clip_planes_enabled(ctx))
 231       st->dirty |= ST_NEW_CLIP_STATE;
 232
 233    if (new_state & _NEW_PIXEL)
 234       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 235
 236    if (new_state & _NEW_CURRENT_ATTRIB && st_vp_uses_current_values(ctx))
 237       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 238
 239    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 240    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 241       st->dirty |= ST_NEW_VS_STATE;
 242
 243    /* Which shaders are dirty will be determined manually. */
 244    if (new_state & _NEW_PROGRAM) {
 245       st->gfx_shaders_may_be_dirty = true;
 246       st->compute_shader_may_be_dirty = true;
 247       /* This will mask out unused shader resources. */
 248       st->active_states = st_get_active_states(ctx);
 249    }
 250
 251    if (new_state & _NEW_TEXTURE_OBJECT) {
 252       st->dirty |= st->active_states &
 253                    (ST_NEW_SAMPLER_VIEWS |
 254                     ST_NEW_SAMPLERS |
 255                     ST_NEW_IMAGE_UNITS);
 256       if (ctx->FragmentProgram._Current &&
 257           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 258          st->dirty |= ST_NEW_FS_STATE;
 259       }
 260    }
 261 }
 262
 263
 264 static void
 265 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 266 {
 267    uint i;
 268
 269    st_destroy_atoms(st);
 270    st_destroy_draw(st);
 271    st_destroy_clear(st);
 272    st_destroy_bitmap(st);
 273    st_destroy_drawpix(st);
 274    st_destroy_drawtex(st);
 275    st_destroy_perfmon(st);
 276    st_destroy_pbo_helpers(st);
 277    st_destroy_bound_texture_handles(st);
 278    st_destroy_bound_image_handles(st);
 279
 280    for (i = 0; i < ARRAY_SIZE(st->state.frag_sampler_views); i++) {
 281       pipe_sampler_view_release(st->pipe,
 282                                 &st->state.frag_sampler_views[i]);
 283    }
 284
 285    /* free glReadPixels cache data */
 286    st_invalidate_readpix_cache(st);
 287    util_throttle_deinit(st->pipe->screen, &st->throttle);
 288
 289    cso_destroy_context(st->cso_context);
 290
 291    if (st->pipe && destroy_pipe)
 292       st->pipe->destroy(st->pipe);
 293
 294    free(st);
 295 }
 296
 297
 298 static void
 299 st_init_driver_flags(struct st_context *st)
 300 {
 301    struct gl_driver_flags *f = &st->ctx->DriverFlags;
 302
 303    f->NewArray = ST_NEW_VERTEX_ARRAYS;
 304    f->NewRasterizerDiscard = ST_NEW_RASTERIZER;
 305    f->NewTileRasterOrder = ST_NEW_RASTERIZER;
 306    f->NewUniformBuffer = ST_NEW_UNIFORM_BUFFER;
 307    f->NewDefaultTessLevels = ST_NEW_TESS_STATE;
 308
 309    /* Shader resources */
 310    f->NewTextureBuffer = ST_NEW_SAMPLER_VIEWS;
 311    if (st->has_hw_atomics)
 312       f->NewAtomicBuffer = ST_NEW_HW_ATOMICS | ST_NEW_CS_ATOMICS;
 313    else
 314       f->NewAtomicBuffer = ST_NEW_ATOMIC_BUFFER;
 315    f->NewShaderStorageBuffer = ST_NEW_STORAGE_BUFFER;
 316    f->NewImageUnits = ST_NEW_IMAGE_UNITS;
 317
 318    f->NewShaderConstants[MESA_SHADER_VERTEX] = ST_NEW_VS_CONSTANTS;
 319    f->NewShaderConstants[MESA_SHADER_TESS_CTRL] = ST_NEW_TCS_CONSTANTS;
 320    f->NewShaderConstants[MESA_SHADER_TESS_EVAL] = ST_NEW_TES_CONSTANTS;
 321    f->NewShaderConstants[MESA_SHADER_GEOMETRY] = ST_NEW_GS_CONSTANTS;
 322    f->NewShaderConstants[MESA_SHADER_FRAGMENT] = ST_NEW_FS_CONSTANTS;
 323    f->NewShaderConstants[MESA_SHADER_COMPUTE] = ST_NEW_CS_CONSTANTS;
 324
 325    f->NewWindowRectangles = ST_NEW_WINDOW_RECTANGLES;
 326    f->NewFramebufferSRGB = ST_NEW_FB_STATE;
 327    f->NewScissorRect = ST_NEW_SCISSOR;
 328    f->NewScissorTest = ST_NEW_SCISSOR | ST_NEW_RASTERIZER;
 329    f->NewAlphaTest = ST_NEW_DSA;
 330    f->NewBlend = ST_NEW_BLEND;
 331    f->NewBlendColor = ST_NEW_BLEND_COLOR;
 332    f->NewColorMask = ST_NEW_BLEND;
 333    f->NewDepth = ST_NEW_DSA;
 334    f->NewLogicOp = ST_NEW_BLEND;
 335    f->NewStencil = ST_NEW_DSA;
 336    f->NewMultisampleEnable = ST_NEW_BLEND | ST_NEW_RASTERIZER |
 337                              ST_NEW_SAMPLE_STATE | ST_NEW_SAMPLE_SHADING;
 338    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 339    f->NewSampleMask = ST_NEW_SAMPLE_STATE;
 340    f->NewSampleLocations = ST_NEW_SAMPLE_STATE;
 341    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 342
 343    /* This depends on what the gallium driver wants. */
 344    if (st->force_persample_in_shader) {
 345       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 346       f->NewSampleShading |= ST_NEW_FS_STATE;
 347    } else {
 348       f->NewSampleShading |= ST_NEW_RASTERIZER;
 349    }
 350
 351    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 352    f->NewClipPlane = ST_NEW_CLIP_STATE;
 353    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 354    f->NewDepthClamp = ST_NEW_RASTERIZER;
 355    f->NewLineState = ST_NEW_RASTERIZER;
 356    f->NewPolygonState = ST_NEW_RASTERIZER;
 357    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 358    f->NewViewport = ST_NEW_VIEWPORT;
 359    f->NewNvConservativeRasterization = ST_NEW_RASTERIZER;
 360    f->NewNvConservativeRasterizationParams = ST_NEW_RASTERIZER;
 361 }
 362
 363
 364 static struct st_context *
 365 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 366                        const struct st_config_options *options, bool no_error)
 367 {
 368    struct pipe_screen *screen = pipe->screen;
 369    uint i;
 370    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 371
 372    st->options = *options;
 373
 374    ctx->st = st;
 375
 376    st->ctx = ctx;
 377    st->pipe = pipe;
 378
 379    /* state tracker needs the VBO module */
 380    _vbo_CreateContext(ctx);
 381
 382    st->dirty = ST_ALL_STATES_MASK;
 383
 384    st->can_bind_const_buffer_as_vertex =
 385       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 386
 387    /* st/mesa always uploads zero-stride vertex attribs, and other user
 388     * vertex buffers are only possible with a compatibility profile.
 389     * So tell the u_vbuf module that user VBOs are not possible with the Core
 390     * profile, so that u_vbuf is bypassed completely if there is nothing else
 391     * to do.
 392     */
 393    unsigned vbuf_flags =
 394       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 395    st->cso_context = cso_create_context(pipe, vbuf_flags);
 396
 397    st_init_atoms(st);
 398    st_init_clear(st);
 399    st_init_pbo_helpers(st);
 400
 401    /* Choose texture target for glDrawPixels, glBitmap, renderbuffers */
 402    if (pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 403       st->internal_target = PIPE_TEXTURE_2D;
 404    else
 405       st->internal_target = PIPE_TEXTURE_RECT;
 406
 407    /* Setup vertex element info for 'struct st_util_vertex'.
 408     */
 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 = 0;
 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 = 0;
 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 = 0;
 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    ctx->Const.PackedDriverUniformStorage =
 441       screen->get_param(screen, PIPE_CAP_PACKED_UNIFORMS);
 442
 443    st->has_stencil_export =
 444       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 445    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 446    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 447                                               PIPE_TEXTURE_2D, 0, 0,
 448                                               PIPE_BIND_SAMPLER_VIEW);
 449    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 450                                               PIPE_TEXTURE_2D, 0, 0,
 451                                               PIPE_BIND_SAMPLER_VIEW);
 452    st->has_astc_2d_ldr =
 453       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
 454                                   PIPE_TEXTURE_2D, 0, 0, PIPE_BIND_SAMPLER_VIEW);
 455    st->prefer_blit_based_texture_transfer = screen->get_param(screen,
 456                               PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER);
 457    st->force_persample_in_shader =
 458       screen->get_param(screen, PIPE_CAP_SAMPLE_SHADING) &&
 459       !screen->get_param(screen, PIPE_CAP_FORCE_PERSAMPLE_INTERP);
 460    st->has_shareable_shaders = screen->get_param(screen,
 461                                                  PIPE_CAP_SHAREABLE_SHADERS);
 462    st->needs_texcoord_semantic =
 463       screen->get_param(screen, PIPE_CAP_TGSI_TEXCOORD);
 464    st->apply_texture_swizzle_to_border_color =
 465       !!(screen->get_param(screen, PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK) &
 466          (PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 |
 467           PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_R600));
 468    st->has_time_elapsed =
 469       screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
 470    st->has_half_float_packing =
 471       screen->get_param(screen, PIPE_CAP_TGSI_PACK_HALF_FLOAT);
 472    st->has_multi_draw_indirect =
 473       screen->get_param(screen, PIPE_CAP_MULTI_DRAW_INDIRECT);
 474    st->has_single_pipe_stat =
 475       screen->get_param(screen, PIPE_CAP_QUERY_PIPELINE_STATISTICS_SINGLE);
 476    st->has_indep_blend_func =
 477       screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC);
 478    st->needs_rgb_dst_alpha_override =
 479       screen->get_param(screen, PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND);
 480
 481    st->has_hw_atomics =
 482       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 483                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 484       ? true : false;
 485
 486    util_throttle_init(&st->throttle,
 487                       screen->get_param(screen,
 488                                         PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET));
 489
 490    /* GL limits and extensions */
 491    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions, ctx->API);
 492    st_init_extensions(pipe->screen, &ctx->Const,
 493                       &ctx->Extensions, &st->options, ctx->API);
 494
 495    if (st_have_perfmon(st)) {
 496       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 497    }
 498
 499    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 500    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 501       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 502          st->clamp_vert_color_in_shader = GL_TRUE;
 503       }
 504
 505       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 506          st->clamp_frag_color_in_shader = GL_TRUE;
 507       }
 508
 509       /* For drivers which cannot do color clamping, it's better to just
 510        * disable ARB_color_buffer_float in the core profile, because
 511        * the clamping is deprecated there anyway. */
 512       if (ctx->API == API_OPENGL_CORE &&
 513           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 514          st->clamp_vert_color_in_shader = GL_FALSE;
 515          st->clamp_frag_color_in_shader = GL_FALSE;
 516          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 517       }
 518    }
 519
 520    /* called after _mesa_create_context/_mesa_init_point, fix default user
 521     * settable max point size up
 522     */
 523    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 524                              ctx->Const.MaxPointSizeAA);
 525    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 526     * is not supported
 527     */
 528    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 529       !st->has_shader_model3;
 530
 531    if (!ctx->Extensions.ARB_gpu_shader5) {
 532       for (i = 0; i < MESA_SHADER_STAGES; i++)
 533          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 534    }
 535
 536    /* Set which shader types can be compiled at link time. */
 537    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 538          st->has_shareable_shaders &&
 539          !st->clamp_vert_color_in_shader;
 540
 541    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 542          st->has_shareable_shaders &&
 543          !st->clamp_frag_color_in_shader &&
 544          !st->force_persample_in_shader;
 545
 546    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 547    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 548    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 549    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 550
 551    st->bitmap.cache.empty = true;
 552
 553    _mesa_override_extensions(ctx);
 554    _mesa_compute_version(ctx);
 555
 556    if (ctx->Version == 0) {
 557       /* This can happen when a core profile was requested, but the driver
 558        * does not support some features of GL 3.1 or later.
 559        */
 560       st_destroy_context_priv(st, false);
 561       return NULL;
 562    }
 563
 564    _mesa_initialize_dispatch_tables(ctx);
 565    _mesa_initialize_vbo_vtxfmt(ctx);
 566    st_init_driver_flags(st);
 567
 568    /* Initialize context's winsys buffers list */
 569    LIST_INITHEAD(&st->winsys_buffers);
 570
 571    return st;
 572 }
 573
 574
 575 static void
 576 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 577 {
 578    struct st_context *st = ctx->st;
 579    st->pipe->emit_string_marker(st->pipe, string, len);
 580 }
 581
 582
 583 static void
 584 st_set_background_context(struct gl_context *ctx,
 585                           struct util_queue_monitoring *queue_info)
 586 {
 587    struct st_context *st = ctx->st;
 588    struct st_manager *smapi =
 589       (struct st_manager *) st->iface.st_context_private;
 590
 591    assert(smapi->set_background_context);
 592    smapi->set_background_context(&st->iface, queue_info);
 593 }
 594
 595
 596 static void
 597 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 598 {
 599    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 600
 601    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 602    memset(uuid, 0, GL_UUID_SIZE_EXT);
 603    screen->get_device_uuid(screen, uuid);
 604 }
 605
 606
 607 static void
 608 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 609 {
 610    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 611
 612    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 613    memset(uuid, 0, GL_UUID_SIZE_EXT);
 614    screen->get_driver_uuid(screen, uuid);
 615 }
 616
 617
 618 static void
 619 st_init_driver_functions(struct pipe_screen *screen,
 620                          struct dd_function_table *functions)
 621 {
 622    _mesa_init_sampler_object_functions(functions);
 623
 624    st_init_draw_functions(functions);
 625    st_init_blit_functions(functions);
 626    st_init_bufferobject_functions(screen, functions);
 627    st_init_clear_functions(functions);
 628    st_init_bitmap_functions(functions);
 629    st_init_copy_image_functions(functions);
 630    st_init_drawpixels_functions(functions);
 631    st_init_rasterpos_functions(functions);
 632
 633    st_init_drawtex_functions(functions);
 634
 635    st_init_eglimage_functions(functions);
 636
 637    st_init_fbo_functions(functions);
 638    st_init_feedback_functions(functions);
 639    st_init_memoryobject_functions(functions);
 640    st_init_msaa_functions(functions);
 641    st_init_perfmon_functions(functions);
 642    st_init_program_functions(functions);
 643    st_init_query_functions(functions);
 644    st_init_cond_render_functions(functions);
 645    st_init_readpixels_functions(functions);
 646    st_init_semaphoreobject_functions(functions);
 647    st_init_texture_functions(functions);
 648    st_init_texture_barrier_functions(functions);
 649    st_init_flush_functions(screen, functions);
 650    st_init_string_functions(functions);
 651    st_init_viewport_functions(functions);
 652    st_init_compute_functions(functions);
 653
 654    st_init_xformfb_functions(functions);
 655    st_init_syncobj_functions(functions);
 656
 657    st_init_vdpau_functions(functions);
 658
 659    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 660       functions->EmitStringMarker = st_emit_string_marker;
 661
 662    functions->Enable = st_Enable;
 663    functions->UpdateState = st_invalidate_state;
 664    functions->QueryMemoryInfo = st_query_memory_info;
 665    functions->SetBackgroundContext = st_set_background_context;
 666    functions->GetDriverUuid = st_get_driver_uuid;
 667    functions->GetDeviceUuid = st_get_device_uuid;
 668
 669    /* GL_ARB_get_program_binary */
 670    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 671
 672    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 673       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 674                                PIPE_SHADER_CAP_PREFERRED_IR);
 675    if (preferred_ir == PIPE_SHADER_IR_NIR) {
 676       functions->ShaderCacheSerializeDriverBlob =  st_serialise_nir_program;
 677       functions->ProgramBinarySerializeDriverBlob =
 678          st_serialise_nir_program_binary;
 679       functions->ProgramBinaryDeserializeDriverBlob =
 680          st_deserialise_nir_program;
 681    } else {
 682       functions->ShaderCacheSerializeDriverBlob =  st_serialise_tgsi_program;
 683       functions->ProgramBinarySerializeDriverBlob =
 684          st_serialise_tgsi_program_binary;
 685       functions->ProgramBinaryDeserializeDriverBlob =
 686          st_deserialise_tgsi_program;
 687    }
 688 }
 689
 690
 691 struct st_context *
 692 st_create_context(gl_api api, struct pipe_context *pipe,
 693                   const struct gl_config *visual,
 694                   struct st_context *share,
 695                   const struct st_config_options *options,
 696                   bool no_error)
 697 {
 698    struct gl_context *ctx;
 699    struct gl_context *shareCtx = share ? share->ctx : NULL;
 700    struct dd_function_table funcs;
 701    struct st_context *st;
 702
 703    util_cpu_detect();
 704
 705    memset(&funcs, 0, sizeof(funcs));
 706    st_init_driver_functions(pipe->screen, &funcs);
 707
 708    ctx = calloc(1, sizeof(struct gl_context));
 709    if (!ctx)
 710       return NULL;
 711
 712    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 713       free(ctx);
 714       return NULL;
 715    }
 716
 717    st_debug_init();
 718
 719    if (pipe->screen->get_disk_shader_cache &&
 720        !(ST_DEBUG & DEBUG_TGSI))
 721       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 722
 723    /* XXX: need a capability bit in gallium to query if the pipe
 724     * driver prefers DP4 or MUL/MAD for vertex transformation.
 725     */
 726    if (debug_get_option_mesa_mvp_dp4())
 727       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 728
 729    st = st_create_context_priv(ctx, pipe, options, no_error);
 730    if (!st) {
 731       _mesa_destroy_context(ctx);
 732    }
 733
 734    return st;
 735 }
 736
 737
 738 /**
 739  * When we destroy a context, we must examine all texture objects to
 740  * find/release any sampler views created by that context.
 741  *
 742  * This callback is called per-texture object.  It releases all the
 743  * texture's sampler views which belong to the context.
 744  */
 745 static void
 746 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 747 {
 748    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 749    struct st_context *st = (struct st_context *) userData;
 750
 751    st_texture_release_sampler_view(st, st_texture_object(texObj));
 752 }
 753
 754
 755 void
 756 st_destroy_context(struct st_context *st)
 757 {
 758    struct gl_context *ctx = st->ctx;
 759    struct st_framebuffer *stfb, *next;
 760
 761    GET_CURRENT_CONTEXT(curctx);
 762
 763    if (curctx == NULL) {
 764       /* No current context, but we need one to release
 765        * renderbuffer surface when we release framebuffer.
 766        * So temporarily bind the context.
 767        */
 768       _mesa_make_current(ctx, NULL, NULL);
 769    }
 770
 771    /* This must be called first so that glthread has a chance to finish */
 772    _mesa_glthread_destroy(ctx);
 773
 774    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 775
 776    st_reference_fragprog(st, &st->fp, NULL);
 777    st_reference_prog(st, &st->gp, NULL);
 778    st_reference_vertprog(st, &st->vp, NULL);
 779    st_reference_prog(st, &st->tcp, NULL);
 780    st_reference_prog(st, &st->tep, NULL);
 781    st_reference_compprog(st, &st->cp, NULL);
 782
 783    /* release framebuffer in the winsys buffers list */
 784    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 785       st_framebuffer_reference(&stfb, NULL);
 786    }
 787
 788    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 789    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 790
 791    _vbo_DestroyContext(ctx);
 792
 793    st_destroy_program_variants(st);
 794
 795    _mesa_free_context_data(ctx);
 796
 797    /* This will free the st_context too, so 'st' must not be accessed
 798     * afterwards. */
 799    st_destroy_context_priv(st, true);
 800    st = NULL;
 801
 802    free(ctx);
 803 }