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 "pipe/p_context.h"
  82 #include "util/u_cpu_detect.h"
  83 #include "util/u_inlines.h"
  84 #include "util/u_upload_mgr.h"
  85 #include "util/u_vbuf.h"
  86 #include "cso_cache/cso_context.h"
  87
  88
  89 DEBUG_GET_ONCE_BOOL_OPTION(mesa_mvp_dp4, "MESA_MVP_DP4", FALSE)
  90
  91
  92 /**
  93  * Called via ctx->Driver.Enable()
  94  */
  95 static void
  96 st_Enable(struct gl_context *ctx, GLenum cap, GLboolean state)
  97 {
  98    struct st_context *st = st_context(ctx);
  99
 100    switch (cap) {
 101    case GL_DEBUG_OUTPUT:
 102    case GL_DEBUG_OUTPUT_SYNCHRONOUS:
 103       st_update_debug_callback(st);
 104       break;
 105    default:
 106       break;
 107    }
 108 }
 109
 110
 111 /**
 112  * Called via ctx->Driver.QueryMemoryInfo()
 113  */
 114 static void
 115 st_query_memory_info(struct gl_context *ctx, struct gl_memory_info *out)
 116 {
 117    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 118    struct pipe_memory_info info;
 119
 120    assert(screen->query_memory_info);
 121    if (!screen->query_memory_info)
 122       return;
 123
 124    screen->query_memory_info(screen, &info);
 125
 126    out->total_device_memory = info.total_device_memory;
 127    out->avail_device_memory = info.avail_device_memory;
 128    out->total_staging_memory = info.total_staging_memory;
 129    out->avail_staging_memory = info.avail_staging_memory;
 130    out->device_memory_evicted = info.device_memory_evicted;
 131    out->nr_device_memory_evictions = info.nr_device_memory_evictions;
 132 }
 133
 134
 135 uint64_t
 136 st_get_active_states(struct gl_context *ctx)
 137 {
 138    struct st_vertex_program *vp =
 139       st_vertex_program(ctx->VertexProgram._Current);
 140    struct st_common_program *tcp =
 141       st_common_program(ctx->TessCtrlProgram._Current);
 142    struct st_common_program *tep =
 143       st_common_program(ctx->TessEvalProgram._Current);
 144    struct st_common_program *gp =
 145       st_common_program(ctx->GeometryProgram._Current);
 146    struct st_fragment_program *fp =
 147       st_fragment_program(ctx->FragmentProgram._Current);
 148    struct st_compute_program *cp =
 149       st_compute_program(ctx->ComputeProgram._Current);
 150    uint64_t active_shader_states = 0;
 151
 152    if (vp)
 153       active_shader_states |= vp->affected_states;
 154    if (tcp)
 155       active_shader_states |= tcp->affected_states;
 156    if (tep)
 157       active_shader_states |= tep->affected_states;
 158    if (gp)
 159       active_shader_states |= gp->affected_states;
 160    if (fp)
 161       active_shader_states |= fp->affected_states;
 162    if (cp)
 163       active_shader_states |= cp->affected_states;
 164
 165    /* Mark non-shader-resource shader states as "always active". */
 166    return active_shader_states | ~ST_ALL_SHADER_RESOURCES;
 167 }
 168
 169
 170 void
 171 st_invalidate_buffers(struct st_context *st)
 172 {
 173    st->dirty |= ST_NEW_BLEND |
 174                 ST_NEW_DSA |
 175                 ST_NEW_FB_STATE |
 176                 ST_NEW_SAMPLE_STATE |
 177                 ST_NEW_SAMPLE_SHADING |
 178                 ST_NEW_FS_STATE |
 179                 ST_NEW_POLY_STIPPLE |
 180                 ST_NEW_VIEWPORT |
 181                 ST_NEW_RASTERIZER |
 182                 ST_NEW_SCISSOR |
 183                 ST_NEW_WINDOW_RECTANGLES;
 184 }
 185
 186
 187 /**
 188  * Called via ctx->Driver.UpdateState()
 189  */
 190 static void
 191 st_invalidate_state(struct gl_context *ctx)
 192 {
 193    GLbitfield new_state = ctx->NewState;
 194    struct st_context *st = st_context(ctx);
 195
 196    if (new_state & _NEW_BUFFERS) {
 197       st_invalidate_buffers(st);
 198    } else {
 199       /* These set a subset of flags set by _NEW_BUFFERS, so we only have to
 200        * check them when _NEW_BUFFERS isn't set.
 201        */
 202       if (new_state & _NEW_PROGRAM)
 203          st->dirty |= ST_NEW_RASTERIZER;
 204
 205       if (new_state & _NEW_FOG)
 206          st->dirty |= ST_NEW_FS_STATE;
 207
 208       if (new_state & _NEW_FRAG_CLAMP) {
 209          if (st->clamp_frag_color_in_shader)
 210             st->dirty |= ST_NEW_FS_STATE;
 211          else
 212             st->dirty |= ST_NEW_RASTERIZER;
 213       }
 214    }
 215
 216    if (new_state & (_NEW_LIGHT |
 217                     _NEW_POINT))
 218       st->dirty |= ST_NEW_RASTERIZER;
 219
 220    if (new_state & _NEW_PROJECTION &&
 221        st_user_clip_planes_enabled(ctx))
 222       st->dirty |= ST_NEW_CLIP_STATE;
 223
 224    if (new_state & _NEW_PIXEL)
 225       st->dirty |= ST_NEW_PIXEL_TRANSFER;
 226
 227    if (new_state & _NEW_CURRENT_ATTRIB)
 228       st->dirty |= ST_NEW_VERTEX_ARRAYS;
 229
 230    /* Update the vertex shader if ctx->Light._ClampVertexColor was changed. */
 231    if (st->clamp_vert_color_in_shader && (new_state & _NEW_LIGHT))
 232       st->dirty |= ST_NEW_VS_STATE;
 233
 234    /* Which shaders are dirty will be determined manually. */
 235    if (new_state & _NEW_PROGRAM) {
 236       st->gfx_shaders_may_be_dirty = true;
 237       st->compute_shader_may_be_dirty = true;
 238       /* This will mask out unused shader resources. */
 239       st->active_states = st_get_active_states(ctx);
 240    }
 241
 242    if (new_state & _NEW_TEXTURE_OBJECT) {
 243       st->dirty |= st->active_states &
 244                    (ST_NEW_SAMPLER_VIEWS |
 245                     ST_NEW_SAMPLERS |
 246                     ST_NEW_IMAGE_UNITS);
 247       if (ctx->FragmentProgram._Current &&
 248           ctx->FragmentProgram._Current->ExternalSamplersUsed) {
 249          st->dirty |= ST_NEW_FS_STATE;
 250       }
 251    }
 252 }
 253
 254
 255 static void
 256 st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
 257 {
 258    uint i;
 259
 260    st_destroy_atoms(st);
 261    st_destroy_draw(st);
 262    st_destroy_clear(st);
 263    st_destroy_bitmap(st);
 264    st_destroy_drawpix(st);
 265    st_destroy_drawtex(st);
 266    st_destroy_perfmon(st);
 267    st_destroy_pbo_helpers(st);
 268    st_destroy_bound_texture_handles(st);
 269    st_destroy_bound_image_handles(st);
 270
 271    for (i = 0; i < ARRAY_SIZE(st->state.frag_sampler_views); i++) {
 272       pipe_sampler_view_release(st->pipe,
 273                                 &st->state.frag_sampler_views[i]);
 274    }
 275
 276    /* free glReadPixels cache data */
 277    st_invalidate_readpix_cache(st);
 278    util_throttle_deinit(st->pipe->screen, &st->throttle);
 279
 280    cso_destroy_context(st->cso_context);
 281
 282    if (st->pipe && destroy_pipe)
 283       st->pipe->destroy(st->pipe);
 284
 285    free(st);
 286 }
 287
 288
 289 static void
 290 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 | ST_NEW_CS_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_STATE | ST_NEW_SAMPLE_SHADING;
 329    f->NewSampleAlphaToXEnable = ST_NEW_BLEND;
 330    f->NewSampleMask = ST_NEW_SAMPLE_STATE;
 331    f->NewSampleLocations = ST_NEW_SAMPLE_STATE;
 332    f->NewSampleShading = ST_NEW_SAMPLE_SHADING;
 333
 334    /* This depends on what the gallium driver wants. */
 335    if (st->force_persample_in_shader) {
 336       f->NewMultisampleEnable |= ST_NEW_FS_STATE;
 337       f->NewSampleShading |= ST_NEW_FS_STATE;
 338    } else {
 339       f->NewSampleShading |= ST_NEW_RASTERIZER;
 340    }
 341
 342    f->NewClipControl = ST_NEW_VIEWPORT | ST_NEW_RASTERIZER;
 343    f->NewClipPlane = ST_NEW_CLIP_STATE;
 344    f->NewClipPlaneEnable = ST_NEW_RASTERIZER;
 345    f->NewDepthClamp = ST_NEW_RASTERIZER;
 346    f->NewLineState = ST_NEW_RASTERIZER;
 347    f->NewPolygonState = ST_NEW_RASTERIZER;
 348    f->NewPolygonStipple = ST_NEW_POLY_STIPPLE;
 349    f->NewViewport = ST_NEW_VIEWPORT;
 350    f->NewNvConservativeRasterization = ST_NEW_RASTERIZER;
 351    f->NewNvConservativeRasterizationParams = ST_NEW_RASTERIZER;
 352 }
 353
 354
 355 static struct st_context *
 356 st_create_context_priv(struct gl_context *ctx, struct pipe_context *pipe,
 357                        const struct st_config_options *options, bool no_error)
 358 {
 359    struct pipe_screen *screen = pipe->screen;
 360    uint i;
 361    struct st_context *st = ST_CALLOC_STRUCT( st_context);
 362
 363    st->options = *options;
 364
 365    ctx->st = st;
 366
 367    st->ctx = ctx;
 368    st->pipe = pipe;
 369
 370    /* state tracker needs the VBO module */
 371    _vbo_CreateContext(ctx);
 372
 373    st->dirty = ST_ALL_STATES_MASK;
 374
 375    st->can_bind_const_buffer_as_vertex =
 376       screen->get_param(screen, PIPE_CAP_CAN_BIND_CONST_BUFFER_AS_VERTEX);
 377
 378    /* st/mesa always uploads zero-stride vertex attribs, and other user
 379     * vertex buffers are only possible with a compatibility profile.
 380     * So tell the u_vbuf module that user VBOs are not possible with the Core
 381     * profile, so that u_vbuf is bypassed completely if there is nothing else
 382     * to do.
 383     */
 384    unsigned vbuf_flags =
 385       ctx->API == API_OPENGL_CORE ? U_VBUF_FLAG_NO_USER_VBOS : 0;
 386    st->cso_context = cso_create_context(pipe, vbuf_flags);
 387
 388    st_init_atoms(st);
 389    st_init_clear(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       STATIC_ASSERT(sizeof(struct st_util_vertex) == 9 * sizeof(float));
 402
 403       memset(&st->util_velems, 0, sizeof(st->util_velems));
 404       st->util_velems[0].src_offset = 0;
 405       st->util_velems[0].vertex_buffer_index = 0;
 406       st->util_velems[0].src_format = PIPE_FORMAT_R32G32B32_FLOAT;
 407       st->util_velems[1].src_offset = 3 * sizeof(float);
 408       st->util_velems[1].vertex_buffer_index = 0;
 409       st->util_velems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 410       st->util_velems[2].src_offset = 7 * sizeof(float);
 411       st->util_velems[2].vertex_buffer_index = 0;
 412       st->util_velems[2].src_format = PIPE_FORMAT_R32G32_FLOAT;
 413    }
 414
 415    /* we want all vertex data to be placed in buffer objects */
 416    vbo_use_buffer_objects(ctx);
 417
 418
 419    /* make sure that no VBOs are left mapped when we're drawing. */
 420    vbo_always_unmap_buffers(ctx);
 421
 422    /* Need these flags:
 423     */
 424    ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 425
 426    ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 427
 428    if (no_error)
 429       ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR;
 430
 431    ctx->Const.PackedDriverUniformStorage =
 432       screen->get_param(screen, PIPE_CAP_PACKED_UNIFORMS);
 433
 434    st->has_stencil_export =
 435       screen->get_param(screen, PIPE_CAP_SHADER_STENCIL_EXPORT);
 436    st->has_shader_model3 = screen->get_param(screen, PIPE_CAP_SM3);
 437    st->has_etc1 = screen->is_format_supported(screen, PIPE_FORMAT_ETC1_RGB8,
 438                                               PIPE_TEXTURE_2D, 0, 0,
 439                                               PIPE_BIND_SAMPLER_VIEW);
 440    st->has_etc2 = screen->is_format_supported(screen, PIPE_FORMAT_ETC2_RGB8,
 441                                               PIPE_TEXTURE_2D, 0, 0,
 442                                               PIPE_BIND_SAMPLER_VIEW);
 443    st->has_astc_2d_ldr =
 444       screen->is_format_supported(screen, PIPE_FORMAT_ASTC_4x4_SRGB,
 445                                   PIPE_TEXTURE_2D, 0, 0, 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    st->has_single_pipe_stat =
 466       screen->get_param(screen, PIPE_CAP_QUERY_PIPELINE_STATISTICS_SINGLE);
 467    st->has_indep_blend_func =
 468       screen->get_param(screen, PIPE_CAP_INDEP_BLEND_FUNC);
 469    st->needs_rgb_dst_alpha_override =
 470       screen->get_param(screen, PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND);
 471
 472    st->has_hw_atomics =
 473       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
 474                                PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS)
 475       ? true : false;
 476
 477    util_throttle_init(&st->throttle,
 478                       screen->get_param(screen,
 479                                         PIPE_CAP_MAX_TEXTURE_UPLOAD_MEMORY_BUDGET));
 480
 481    /* GL limits and extensions */
 482    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions, ctx->API);
 483    st_init_extensions(pipe->screen, &ctx->Const,
 484                       &ctx->Extensions, &st->options, ctx->API);
 485
 486    if (st_have_perfmon(st)) {
 487       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
 488    }
 489
 490    /* Enable shader-based fallbacks for ARB_color_buffer_float if needed. */
 491    if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
 492       if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
 493          st->clamp_vert_color_in_shader = GL_TRUE;
 494       }
 495
 496       if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
 497          st->clamp_frag_color_in_shader = GL_TRUE;
 498       }
 499
 500       /* For drivers which cannot do color clamping, it's better to just
 501        * disable ARB_color_buffer_float in the core profile, because
 502        * the clamping is deprecated there anyway. */
 503       if (ctx->API == API_OPENGL_CORE &&
 504           (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
 505          st->clamp_vert_color_in_shader = GL_FALSE;
 506          st->clamp_frag_color_in_shader = GL_FALSE;
 507          ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
 508       }
 509    }
 510
 511    /* called after _mesa_create_context/_mesa_init_point, fix default user
 512     * settable max point size up
 513     */
 514    ctx->Point.MaxSize = MAX2(ctx->Const.MaxPointSize,
 515                              ctx->Const.MaxPointSizeAA);
 516    /* For vertex shaders, make sure not to emit saturate when SM 3.0
 517     * is not supported
 518     */
 519    ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].EmitNoSat =
 520       !st->has_shader_model3;
 521
 522    if (!ctx->Extensions.ARB_gpu_shader5) {
 523       for (i = 0; i < MESA_SHADER_STAGES; i++)
 524          ctx->Const.ShaderCompilerOptions[i].EmitNoIndirectSampler = true;
 525    }
 526
 527    /* Set which shader types can be compiled at link time. */
 528    st->shader_has_one_variant[MESA_SHADER_VERTEX] =
 529          st->has_shareable_shaders &&
 530          !st->clamp_vert_color_in_shader;
 531
 532    st->shader_has_one_variant[MESA_SHADER_FRAGMENT] =
 533          st->has_shareable_shaders &&
 534          !st->clamp_frag_color_in_shader &&
 535          !st->force_persample_in_shader;
 536
 537    st->shader_has_one_variant[MESA_SHADER_TESS_CTRL] = st->has_shareable_shaders;
 538    st->shader_has_one_variant[MESA_SHADER_TESS_EVAL] = st->has_shareable_shaders;
 539    st->shader_has_one_variant[MESA_SHADER_GEOMETRY] = st->has_shareable_shaders;
 540    st->shader_has_one_variant[MESA_SHADER_COMPUTE] = st->has_shareable_shaders;
 541
 542    st->bitmap.cache.empty = true;
 543
 544    _mesa_override_extensions(ctx);
 545    _mesa_compute_version(ctx);
 546
 547    if (ctx->Version == 0) {
 548       /* This can happen when a core profile was requested, but the driver
 549        * does not support some features of GL 3.1 or later.
 550        */
 551       st_destroy_context_priv(st, false);
 552       return NULL;
 553    }
 554
 555    _mesa_initialize_dispatch_tables(ctx);
 556    _mesa_initialize_vbo_vtxfmt(ctx);
 557    st_init_driver_flags(st);
 558
 559    /* Initialize context's winsys buffers list */
 560    LIST_INITHEAD(&st->winsys_buffers);
 561
 562    return st;
 563 }
 564
 565
 566 struct st_context *
 567 st_create_context(gl_api api, struct pipe_context *pipe,
 568                   const struct gl_config *visual,
 569                   struct st_context *share,
 570                   const struct st_config_options *options,
 571                   bool no_error)
 572 {
 573    struct gl_context *ctx;
 574    struct gl_context *shareCtx = share ? share->ctx : NULL;
 575    struct dd_function_table funcs;
 576    struct st_context *st;
 577
 578    util_cpu_detect();
 579
 580    memset(&funcs, 0, sizeof(funcs));
 581    st_init_driver_functions(pipe->screen, &funcs);
 582
 583    ctx = calloc(1, sizeof(struct gl_context));
 584    if (!ctx)
 585       return NULL;
 586
 587    if (!_mesa_initialize_context(ctx, api, visual, shareCtx, &funcs)) {
 588       free(ctx);
 589       return NULL;
 590    }
 591
 592    st_debug_init();
 593
 594    if (pipe->screen->get_disk_shader_cache &&
 595        !(ST_DEBUG & DEBUG_TGSI))
 596       ctx->Cache = pipe->screen->get_disk_shader_cache(pipe->screen);
 597
 598    /* XXX: need a capability bit in gallium to query if the pipe
 599     * driver prefers DP4 or MUL/MAD for vertex transformation.
 600     */
 601    if (debug_get_option_mesa_mvp_dp4())
 602       ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS = GL_TRUE;
 603
 604    st = st_create_context_priv(ctx, pipe, options, no_error);
 605    if (!st) {
 606       _mesa_destroy_context(ctx);
 607    }
 608
 609    return st;
 610 }
 611
 612
 613 /**
 614  * Callback to release the sampler view attached to a texture object.
 615  * Called by _mesa_HashWalk().
 616  */
 617 static void
 618 destroy_tex_sampler_cb(GLuint id, void *data, void *userData)
 619 {
 620    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 621    struct st_context *st = (struct st_context *) userData;
 622
 623    st_texture_release_sampler_view(st, st_texture_object(texObj));
 624 }
 625
 626
 627 void
 628 st_destroy_context(struct st_context *st)
 629 {
 630    struct gl_context *ctx = st->ctx;
 631    struct st_framebuffer *stfb, *next;
 632
 633    GET_CURRENT_CONTEXT(curctx);
 634
 635    if (curctx == NULL) {
 636       /* No current context, but we need one to release
 637        * renderbuffer surface when we release framebuffer.
 638        * So temporarily bind the context.
 639        */
 640       _mesa_make_current(ctx, NULL, NULL);
 641    }
 642
 643    /* This must be called first so that glthread has a chance to finish */
 644    _mesa_glthread_destroy(ctx);
 645
 646    _mesa_HashWalk(ctx->Shared->TexObjects, destroy_tex_sampler_cb, st);
 647
 648    st_reference_fragprog(st, &st->fp, NULL);
 649    st_reference_prog(st, &st->gp, NULL);
 650    st_reference_vertprog(st, &st->vp, NULL);
 651    st_reference_prog(st, &st->tcp, NULL);
 652    st_reference_prog(st, &st->tep, NULL);
 653    st_reference_compprog(st, &st->cp, NULL);
 654
 655    /* release framebuffer in the winsys buffers list */
 656    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 657       st_framebuffer_reference(&stfb, NULL);
 658    }
 659
 660    pipe_sampler_view_reference(&st->pixel_xfer.pixelmap_sampler_view, NULL);
 661    pipe_resource_reference(&st->pixel_xfer.pixelmap_texture, NULL);
 662
 663    _vbo_DestroyContext(ctx);
 664
 665    st_destroy_program_variants(st);
 666
 667    _mesa_free_context_data(ctx);
 668
 669    /* This will free the st_context too, so 'st' must not be accessed
 670     * afterwards. */
 671    st_destroy_context_priv(st, true);
 672    st = NULL;
 673
 674    free(ctx);
 675 }
 676
 677
 678 static void
 679 st_emit_string_marker(struct gl_context *ctx, const GLchar *string, GLsizei len)
 680 {
 681    struct st_context *st = ctx->st;
 682    st->pipe->emit_string_marker(st->pipe, string, len);
 683 }
 684
 685
 686 static void
 687 st_set_background_context(struct gl_context *ctx,
 688                           struct util_queue_monitoring *queue_info)
 689 {
 690    struct st_context *st = ctx->st;
 691    struct st_manager *smapi =
 692       (struct st_manager *) st->iface.st_context_private;
 693
 694    assert(smapi->set_background_context);
 695    smapi->set_background_context(&st->iface, queue_info);
 696 }
 697
 698
 699 static void
 700 st_get_device_uuid(struct gl_context *ctx, char *uuid)
 701 {
 702    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 703
 704    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 705    memset(uuid, 0, GL_UUID_SIZE_EXT);
 706    screen->get_device_uuid(screen, uuid);
 707 }
 708
 709
 710 static void
 711 st_get_driver_uuid(struct gl_context *ctx, char *uuid)
 712 {
 713    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
 714
 715    assert(GL_UUID_SIZE_EXT >= PIPE_UUID_SIZE);
 716    memset(uuid, 0, GL_UUID_SIZE_EXT);
 717    screen->get_driver_uuid(screen, uuid);
 718 }
 719
 720
 721 void
 722 st_init_driver_functions(struct pipe_screen *screen,
 723                          struct dd_function_table *functions)
 724 {
 725    _mesa_init_sampler_object_functions(functions);
 726
 727    st_init_draw_functions(functions);
 728    st_init_blit_functions(functions);
 729    st_init_bufferobject_functions(screen, functions);
 730    st_init_clear_functions(functions);
 731    st_init_bitmap_functions(functions);
 732    st_init_copy_image_functions(functions);
 733    st_init_drawpixels_functions(functions);
 734    st_init_rasterpos_functions(functions);
 735
 736    st_init_drawtex_functions(functions);
 737
 738    st_init_eglimage_functions(functions);
 739
 740    st_init_fbo_functions(functions);
 741    st_init_feedback_functions(functions);
 742    st_init_memoryobject_functions(functions);
 743    st_init_msaa_functions(functions);
 744    st_init_perfmon_functions(functions);
 745    st_init_program_functions(functions);
 746    st_init_query_functions(functions);
 747    st_init_cond_render_functions(functions);
 748    st_init_readpixels_functions(functions);
 749    st_init_semaphoreobject_functions(functions);
 750    st_init_texture_functions(functions);
 751    st_init_texture_barrier_functions(functions);
 752    st_init_flush_functions(screen, functions);
 753    st_init_string_functions(functions);
 754    st_init_viewport_functions(functions);
 755    st_init_compute_functions(functions);
 756
 757    st_init_xformfb_functions(functions);
 758    st_init_syncobj_functions(functions);
 759
 760    st_init_vdpau_functions(functions);
 761
 762    if (screen->get_param(screen, PIPE_CAP_STRING_MARKER))
 763       functions->EmitStringMarker = st_emit_string_marker;
 764
 765    functions->Enable = st_Enable;
 766    functions->UpdateState = st_invalidate_state;
 767    functions->QueryMemoryInfo = st_query_memory_info;
 768    functions->SetBackgroundContext = st_set_background_context;
 769    functions->GetDriverUuid = st_get_driver_uuid;
 770    functions->GetDeviceUuid = st_get_device_uuid;
 771
 772    /* GL_ARB_get_program_binary */
 773    functions->GetProgramBinaryDriverSHA1 = st_get_program_binary_driver_sha1;
 774
 775    enum pipe_shader_ir preferred_ir = (enum pipe_shader_ir)
 776       screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
 777                                PIPE_SHADER_CAP_PREFERRED_IR);
 778    if (preferred_ir == PIPE_SHADER_IR_NIR) {
 779       functions->ShaderCacheSerializeDriverBlob =  st_serialise_nir_program;
 780       functions->ProgramBinarySerializeDriverBlob =
 781          st_serialise_nir_program_binary;
 782       functions->ProgramBinaryDeserializeDriverBlob =
 783          st_deserialise_nir_program;
 784    } else {
 785       functions->ShaderCacheSerializeDriverBlob =  st_serialise_tgsi_program;
 786       functions->ProgramBinarySerializeDriverBlob =
 787          st_serialise_tgsi_program_binary;
 788       functions->ProgramBinaryDeserializeDriverBlob =
 789          st_deserialise_tgsi_program;
 790    }
 791 }