src/mesa/main/state.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.3
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \file state.c
  28  * State management.
  29  *
  30  * This file manages recalculation of derived values in struct gl_context.
  31  */
  32
  33
  34 #include "glheader.h"
  35 #include "mtypes.h"
  36 #include "context.h"
  37 #include "debug.h"
  38 #include "macros.h"
  39 #include "ffvertex_prog.h"
  40 #include "framebuffer.h"
  41 #include "light.h"
  42 #include "matrix.h"
  43 #include "pixel.h"
  44 #include "program/program.h"
  45 #include "program/prog_parameter.h"
  46 #include "state.h"
  47 #include "stencil.h"
  48 #include "texenvprogram.h"
  49 #include "texobj.h"
  50 #include "texstate.h"
  51
  52
  53 static void
  54 update_separate_specular(struct gl_context *ctx)
  55 {
  56    if (NEED_SECONDARY_COLOR(ctx))
  57       ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
  58    else
  59       ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR;
  60 }
  61
  62
  63 /**
  64  * Compute the index of the last array element that can be safely accessed
  65  * in a vertex array.  We can really only do this when the array lives in
  66  * a VBO.
  67  * The array->_MaxElement field will be updated.
  68  * Later in glDrawArrays/Elements/etc we can do some bounds checking.
  69  */
  70 static void
  71 compute_max_element(struct gl_client_array *array)
  72 {
  73    assert(array->Enabled);
  74    if (array->BufferObj->Name) {
  75       GLsizeiptrARB offset = (GLsizeiptrARB) array->Ptr;
  76       GLsizeiptrARB obj_size = (GLsizeiptrARB) array->BufferObj->Size;
  77
  78       if (offset < obj_size) {
  79          array->_MaxElement = (obj_size - offset +
  80                                array->StrideB -
  81                                array->_ElementSize) / array->StrideB;
  82       } else {
  83          array->_MaxElement = 0;
  84       }
  85    }
  86    else {
  87       /* user-space array, no idea how big it is */
  88       array->_MaxElement = 2 * 1000 * 1000 * 1000; /* just a big number */
  89    }
  90 }
  91
  92
  93 /**
  94  * Helper for update_arrays().
  95  * \return  min(current min, array->_MaxElement).
  96  */
  97 static GLuint
  98 update_min(GLuint min, struct gl_client_array *array)
  99 {
 100    compute_max_element(array);
 101    return MIN2(min, array->_MaxElement);
 102 }
 103
 104
 105 /**
 106  * Update ctx->Array._MaxElement (the max legal index into all enabled arrays).
 107  * Need to do this upon new array state or new buffer object state.
 108  */
 109 static void
 110 update_arrays( struct gl_context *ctx )
 111 {
 112    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
 113    GLuint i, min = ~0;
 114
 115    /* find min of _MaxElement values for all enabled arrays */
 116
 117    /* 0 */
 118    if (ctx->VertexProgram._Current
 119        && arrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) {
 120       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_POS]);
 121    }
 122    else if (arrayObj->Vertex.Enabled) {
 123       min = update_min(min, &arrayObj->Vertex);
 124    }
 125
 126    /* 1 */
 127    if (ctx->VertexProgram._Enabled
 128        && arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) {
 129       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]);
 130    }
 131    /* no conventional vertex weight array */
 132
 133    /* 2 */
 134    if (ctx->VertexProgram._Enabled
 135        && arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
 136       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]);
 137    }
 138    else if (arrayObj->Normal.Enabled) {
 139       min = update_min(min, &arrayObj->Normal);
 140    }
 141
 142    /* 3 */
 143    if (ctx->VertexProgram._Enabled
 144        && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) {
 145       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]);
 146    }
 147    else if (arrayObj->Color.Enabled) {
 148       min = update_min(min, &arrayObj->Color);
 149    }
 150
 151    /* 4 */
 152    if (ctx->VertexProgram._Enabled
 153        && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) {
 154       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]);
 155    }
 156    else if (arrayObj->SecondaryColor.Enabled) {
 157       min = update_min(min, &arrayObj->SecondaryColor);
 158    }
 159
 160    /* 5 */
 161    if (ctx->VertexProgram._Enabled
 162        && arrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
 163       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_FOG]);
 164    }
 165    else if (arrayObj->FogCoord.Enabled) {
 166       min = update_min(min, &arrayObj->FogCoord);
 167    }
 168
 169    /* 6 */
 170    if (ctx->VertexProgram._Enabled
 171        && arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
 172       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]);
 173    }
 174    else if (arrayObj->Index.Enabled) {
 175       min = update_min(min, &arrayObj->Index);
 176    }
 177
 178    /* 7 */
 179    if (ctx->VertexProgram._Enabled
 180        && arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
 181       min = update_min(min, &arrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]);
 182    }
 183
 184    /* 8..15 */
 185    for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) {
 186       if (ctx->VertexProgram._Enabled
 187           && arrayObj->VertexAttrib[i].Enabled) {
 188          min = update_min(min, &arrayObj->VertexAttrib[i]);
 189       }
 190       else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits
 191                && arrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) {
 192          min = update_min(min, &arrayObj->TexCoord[i - VERT_ATTRIB_TEX0]);
 193       }
 194    }
 195
 196    /* 16..31 */
 197    if (ctx->VertexProgram._Current) {
 198       for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {
 199          if (arrayObj->VertexAttrib[i].Enabled) {
 200             min = update_min(min, &arrayObj->VertexAttrib[i]);
 201          }
 202       }
 203    }
 204
 205    if (arrayObj->EdgeFlag.Enabled) {
 206       min = update_min(min, &arrayObj->EdgeFlag);
 207    }
 208
 209    /* _MaxElement is one past the last legal array element */
 210    arrayObj->_MaxElement = min;
 211 }
 212
 213
 214 /**
 215  * Update the following fields:
 216  *   ctx->VertexProgram._Enabled
 217  *   ctx->FragmentProgram._Enabled
 218  *   ctx->ATIFragmentShader._Enabled
 219  * This needs to be done before texture state validation.
 220  */
 221 static void
 222 update_program_enables(struct gl_context *ctx)
 223 {
 224    /* These _Enabled flags indicate if the program is enabled AND valid. */
 225    ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
 226       && ctx->VertexProgram.Current->Base.Instructions;
 227    ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled
 228       && ctx->FragmentProgram.Current->Base.Instructions;
 229    ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled
 230       && ctx->ATIFragmentShader.Current->Instructions[0];
 231 }
 232
 233
 234 /**
 235  * Update vertex/fragment program state.  In particular, update these fields:
 236  *   ctx->VertexProgram._Current
 237  *   ctx->VertexProgram._TnlProgram,
 238  * These point to the highest priority enabled vertex/fragment program or are
 239  * NULL if fixed-function processing is to be done.
 240  *
 241  * This function needs to be called after texture state validation in case
 242  * we're generating a fragment program from fixed-function texture state.
 243  *
 244  * \return bitfield which will indicate _NEW_PROGRAM state if a new vertex
 245  * or fragment program is being used.
 246  */
 247 static GLbitfield
 248 update_program(struct gl_context *ctx)
 249 {
 250    const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 251    const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
 252    const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
 253    const struct gl_geometry_program *prevGP = ctx->GeometryProgram._Current;
 254    GLbitfield new_state = 0x0;
 255
 256    /*
 257     * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current
 258     * pointers to the programs that should be used for rendering.  If either
 259     * is NULL, use fixed-function code paths.
 260     *
 261     * These programs may come from several sources.  The priority is as
 262     * follows:
 263     *   1. OpenGL 2.0/ARB vertex/fragment shaders
 264     *   2. ARB/NV vertex/fragment programs
 265     *   3. Programs derived from fixed-function state.
 266     *
 267     * Note: it's possible for a vertex shader to get used with a fragment
 268     * program (and vice versa) here, but in practice that shouldn't ever
 269     * come up, or matter.
 270     */
 271
 272    if (shProg && shProg->LinkStatus && shProg->FragmentProgram) {
 273       /* Use shader programs */
 274       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 275                                shProg->FragmentProgram);
 276    }
 277    else if (ctx->FragmentProgram._Enabled) {
 278       /* use user-defined vertex program */
 279       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 280                                ctx->FragmentProgram.Current);
 281    }
 282    else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
 283       /* Use fragment program generated from fixed-function state.
 284        */
 285       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 286                                _mesa_get_fixed_func_fragment_program(ctx));
 287       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
 288                                ctx->FragmentProgram._Current);
 289    }
 290    else {
 291       /* no fragment program */
 292       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
 293    }
 294
 295    if (shProg && shProg->LinkStatus && shProg->GeometryProgram) {
 296       /* Use shader programs */
 297       _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
 298                                shProg->GeometryProgram);
 299    } else {
 300       /* no fragment program */
 301       _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);
 302    }
 303
 304    /* Examine vertex program after fragment program as
 305     * _mesa_get_fixed_func_vertex_program() needs to know active
 306     * fragprog inputs.
 307     */
 308    if (shProg && shProg->LinkStatus && shProg->VertexProgram) {
 309       /* Use shader programs */
 310       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 311                             shProg->VertexProgram);
 312    }
 313    else if (ctx->VertexProgram._Enabled) {
 314       /* use user-defined vertex program */
 315       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 316                                ctx->VertexProgram.Current);
 317    }
 318    else if (ctx->VertexProgram._MaintainTnlProgram) {
 319       /* Use vertex program generated from fixed-function state.
 320        */
 321       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 322                                _mesa_get_fixed_func_vertex_program(ctx));
 323       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram,
 324                                ctx->VertexProgram._Current);
 325    }
 326    else {
 327       /* no vertex program */
 328       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
 329    }
 330
 331    /* Let the driver know what's happening:
 332     */
 333    if (ctx->FragmentProgram._Current != prevFP) {
 334       new_state |= _NEW_PROGRAM;
 335       if (ctx->Driver.BindProgram) {
 336          ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
 337                           (struct gl_program *) ctx->FragmentProgram._Current);
 338       }
 339    }
 340
 341    if (ctx->GeometryProgram._Current != prevGP) {
 342       new_state |= _NEW_PROGRAM;
 343       if (ctx->Driver.BindProgram) {
 344          ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,
 345                             (struct gl_program *) ctx->GeometryProgram._Current);
 346       }
 347    }
 348
 349    if (ctx->VertexProgram._Current != prevVP) {
 350       new_state |= _NEW_PROGRAM;
 351       if (ctx->Driver.BindProgram) {
 352          ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 353                             (struct gl_program *) ctx->VertexProgram._Current);
 354       }
 355    }
 356
 357    return new_state;
 358 }
 359
 360
 361 /**
 362  * Examine shader constants and return either _NEW_PROGRAM_CONSTANTS or 0.
 363  */
 364 static GLbitfield
 365 update_program_constants(struct gl_context *ctx)
 366 {
 367    GLbitfield new_state = 0x0;
 368
 369    if (ctx->FragmentProgram._Current) {
 370       const struct gl_program_parameter_list *params =
 371          ctx->FragmentProgram._Current->Base.Parameters;
 372       if (params && params->StateFlags & ctx->NewState) {
 373          new_state |= _NEW_PROGRAM_CONSTANTS;
 374       }
 375    }
 376
 377    if (ctx->GeometryProgram._Current) {
 378       const struct gl_program_parameter_list *params =
 379          ctx->GeometryProgram._Current->Base.Parameters;
 380       /*FIXME: StateFlags is always 0 because we have unnamed constant
 381        *       not state changes */
 382       if (params /*&& params->StateFlags & ctx->NewState*/) {
 383          new_state |= _NEW_PROGRAM_CONSTANTS;
 384       }
 385    }
 386
 387    if (ctx->VertexProgram._Current) {
 388       const struct gl_program_parameter_list *params =
 389          ctx->VertexProgram._Current->Base.Parameters;
 390       if (params && params->StateFlags & ctx->NewState) {
 391          new_state |= _NEW_PROGRAM_CONSTANTS;
 392       }
 393    }
 394
 395    return new_state;
 396 }
 397
 398
 399
 400
 401 static void
 402 update_viewport_matrix(struct gl_context *ctx)
 403 {
 404    const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
 405
 406    ASSERT(depthMax > 0);
 407
 408    /* Compute scale and bias values. This is really driver-specific
 409     * and should be maintained elsewhere if at all.
 410     * NOTE: RasterPos uses this.
 411     */
 412    _math_matrix_viewport(&ctx->Viewport._WindowMap,
 413                          ctx->Viewport.X, ctx->Viewport.Y,
 414                          ctx->Viewport.Width, ctx->Viewport.Height,
 415                          ctx->Viewport.Near, ctx->Viewport.Far,
 416                          depthMax);
 417 }
 418
 419
 420 /**
 421  * Update derived multisample state.
 422  */
 423 static void
 424 update_multisample(struct gl_context *ctx)
 425 {
 426    ctx->Multisample._Enabled = GL_FALSE;
 427    if (ctx->Multisample.Enabled &&
 428        ctx->DrawBuffer &&
 429        ctx->DrawBuffer->Visual.sampleBuffers)
 430       ctx->Multisample._Enabled = GL_TRUE;
 431 }
 432
 433
 434 /**
 435  * Update derived color/blend/logicop state.
 436  */
 437 static void
 438 update_color(struct gl_context *ctx)
 439 {
 440    /* This is needed to support 1.1's RGB logic ops AND
 441     * 1.0's blending logicops.
 442     */
 443    ctx->Color._LogicOpEnabled = RGBA_LOGICOP_ENABLED(ctx);
 444 }
 445
 446
 447 /*
 448  * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
 449  * in ctx->_TriangleCaps if needed.
 450  */
 451 static void
 452 update_polygon(struct gl_context *ctx)
 453 {
 454    ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
 455
 456    if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 457       ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 458
 459    if (   ctx->Polygon.OffsetPoint
 460        || ctx->Polygon.OffsetLine
 461        || ctx->Polygon.OffsetFill)
 462       ctx->_TriangleCaps |= DD_TRI_OFFSET;
 463 }
 464
 465
 466 /**
 467  * Update the ctx->_TriangleCaps bitfield.
 468  * XXX that bitfield should really go away someday!
 469  * This function must be called after other update_*() functions since
 470  * there are dependencies on some other derived values.
 471  */
 472 #if 0
 473 static void
 474 update_tricaps(struct gl_context *ctx, GLbitfield new_state)
 475 {
 476    ctx->_TriangleCaps = 0;
 477
 478    /*
 479     * Points
 480     */
 481    if (1/*new_state & _NEW_POINT*/) {
 482       if (ctx->Point.SmoothFlag)
 483          ctx->_TriangleCaps |= DD_POINT_SMOOTH;
 484       if (ctx->Point.Size != 1.0F)
 485          ctx->_TriangleCaps |= DD_POINT_SIZE;
 486       if (ctx->Point._Attenuated)
 487          ctx->_TriangleCaps |= DD_POINT_ATTEN;
 488    }
 489
 490    /*
 491     * Lines
 492     */
 493    if (1/*new_state & _NEW_LINE*/) {
 494       if (ctx->Line.SmoothFlag)
 495          ctx->_TriangleCaps |= DD_LINE_SMOOTH;
 496       if (ctx->Line.StippleFlag)
 497          ctx->_TriangleCaps |= DD_LINE_STIPPLE;
 498       if (ctx->Line.Width != 1.0)
 499          ctx->_TriangleCaps |= DD_LINE_WIDTH;
 500    }
 501
 502    /*
 503     * Polygons
 504     */
 505    if (1/*new_state & _NEW_POLYGON*/) {
 506       if (ctx->Polygon.SmoothFlag)
 507          ctx->_TriangleCaps |= DD_TRI_SMOOTH;
 508       if (ctx->Polygon.StippleFlag)
 509          ctx->_TriangleCaps |= DD_TRI_STIPPLE;
 510       if (ctx->Polygon.FrontMode != GL_FILL
 511           || ctx->Polygon.BackMode != GL_FILL)
 512          ctx->_TriangleCaps |= DD_TRI_UNFILLED;
 513       if (ctx->Polygon.CullFlag
 514           && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 515          ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 516       if (ctx->Polygon.OffsetPoint ||
 517           ctx->Polygon.OffsetLine ||
 518           ctx->Polygon.OffsetFill)
 519          ctx->_TriangleCaps |= DD_TRI_OFFSET;
 520    }
 521
 522    /*
 523     * Lighting and shading
 524     */
 525    if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 526       ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
 527    if (ctx->Light.ShadeModel == GL_FLAT)
 528       ctx->_TriangleCaps |= DD_FLATSHADE;
 529    if (NEED_SECONDARY_COLOR(ctx))
 530       ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
 531
 532    /*
 533     * Stencil
 534     */
 535    if (ctx->Stencil._TestTwoSide)
 536       ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;
 537 }
 538 #endif
 539
 540
 541 /**
 542  * Compute derived GL state.
 543  * If __struct gl_contextRec::NewState is non-zero then this function \b must
 544  * be called before rendering anything.
 545  *
 546  * Calls dd_function_table::UpdateState to perform any internal state
 547  * management necessary.
 548  *
 549  * \sa _mesa_update_modelview_project(), _mesa_update_texture(),
 550  * _mesa_update_buffer_bounds(),
 551  * _mesa_update_lighting() and _mesa_update_tnl_spaces().
 552  */
 553 void
 554 _mesa_update_state_locked( struct gl_context *ctx )
 555 {
 556    GLbitfield new_state = ctx->NewState;
 557    GLbitfield prog_flags = _NEW_PROGRAM;
 558    GLbitfield new_prog_state = 0x0;
 559
 560    if (new_state == _NEW_CURRENT_ATTRIB)
 561       goto out;
 562
 563    if (MESA_VERBOSE & VERBOSE_STATE)
 564       _mesa_print_state("_mesa_update_state", new_state);
 565
 566    /* Determine which state flags effect vertex/fragment program state */
 567    if (ctx->FragmentProgram._MaintainTexEnvProgram) {
 568       prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE | _NEW_FOG |
 569                      _NEW_ARRAY | _NEW_LIGHT | _NEW_POINT | _NEW_RENDERMODE |
 570                      _NEW_PROGRAM);
 571    }
 572    if (ctx->VertexProgram._MaintainTnlProgram) {
 573       prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |
 574                      _NEW_TRANSFORM | _NEW_POINT |
 575                      _NEW_FOG | _NEW_LIGHT |
 576                      _MESA_NEW_NEED_EYE_COORDS);
 577    }
 578
 579    /*
 580     * Now update derived state info
 581     */
 582
 583    if (new_state & prog_flags)
 584       update_program_enables( ctx );
 585
 586    if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
 587       _mesa_update_modelview_project( ctx, new_state );
 588
 589    if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
 590       _mesa_update_texture( ctx, new_state );
 591
 592    if (new_state & _NEW_BUFFERS)
 593       _mesa_update_framebuffer(ctx);
 594
 595    if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
 596       _mesa_update_draw_buffer_bounds( ctx );
 597
 598    if (new_state & _NEW_POLYGON)
 599       update_polygon( ctx );
 600
 601    if (new_state & _NEW_LIGHT)
 602       _mesa_update_lighting( ctx );
 603
 604    if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
 605       _mesa_update_stencil( ctx );
 606
 607    if (new_state & _MESA_NEW_TRANSFER_STATE)
 608       _mesa_update_pixel( ctx, new_state );
 609
 610    if (new_state & _DD_NEW_SEPARATE_SPECULAR)
 611       update_separate_specular( ctx );
 612
 613    if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
 614       update_viewport_matrix(ctx);
 615
 616    if (new_state & _NEW_MULTISAMPLE)
 617       update_multisample( ctx );
 618
 619    if (new_state & _NEW_COLOR)
 620       update_color( ctx );
 621
 622 #if 0
 623    if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT
 624                     | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))
 625       update_tricaps( ctx, new_state );
 626 #endif
 627
 628    /* ctx->_NeedEyeCoords is now up to date.
 629     *
 630     * If the truth value of this variable has changed, update for the
 631     * new lighting space and recompute the positions of lights and the
 632     * normal transform.
 633     *
 634     * If the lighting space hasn't changed, may still need to recompute
 635     * light positions & normal transforms for other reasons.
 636     */
 637    if (new_state & _MESA_NEW_NEED_EYE_COORDS)
 638       _mesa_update_tnl_spaces( ctx, new_state );
 639
 640    if (new_state & prog_flags) {
 641       /* When we generate programs from fixed-function vertex/fragment state
 642        * this call may generate/bind a new program.  If so, we need to
 643        * propogate the _NEW_PROGRAM flag to the driver.
 644        */
 645       new_prog_state |= update_program( ctx );
 646    }
 647
 648    if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
 649       update_arrays( ctx );
 650
 651  out:
 652    new_prog_state |= update_program_constants(ctx);
 653
 654    /*
 655     * Give the driver a chance to act upon the new_state flags.
 656     * The driver might plug in different span functions, for example.
 657     * Also, this is where the driver can invalidate the state of any
 658     * active modules (such as swrast_setup, swrast, tnl, etc).
 659     *
 660     * Set ctx->NewState to zero to avoid recursion if
 661     * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
 662     */
 663    new_state = ctx->NewState | new_prog_state;
 664    ctx->NewState = 0;
 665    ctx->Driver.UpdateState(ctx, new_state);
 666    ctx->Array.NewState = 0;
 667 }
 668
 669
 670 /* This is the usual entrypoint for state updates:
 671  */
 672 void
 673 _mesa_update_state( struct gl_context *ctx )
 674 {
 675    _mesa_lock_context_textures(ctx);
 676    _mesa_update_state_locked(ctx);
 677    _mesa_unlock_context_textures(ctx);
 678 }
 679
 680
 681
 682
 683 /**
 684  * Want to figure out which fragment program inputs are actually
 685  * constant/current values from ctx->Current.  These should be
 686  * referenced as a tracked state variable rather than a fragment
 687  * program input, to save the overhead of putting a constant value in
 688  * every submitted vertex, transferring it to hardware, interpolating
 689  * it across the triangle, etc...
 690  *
 691  * When there is a VP bound, just use vp->outputs.  But when we're
 692  * generating vp from fixed function state, basically want to
 693  * calculate:
 694  *
 695  * vp_out_2_fp_in( vp_in_2_vp_out( varying_inputs ) |
 696  *                 potential_vp_outputs )
 697  *
 698  * Where potential_vp_outputs is calculated by looking at enabled
 699  * texgen, etc.
 700  *
 701  * The generated fragment program should then only declare inputs that
 702  * may vary or otherwise differ from the ctx->Current values.
 703  * Otherwise, the fp should track them as state values instead.
 704  */
 705 void
 706 _mesa_set_varying_vp_inputs( struct gl_context *ctx,
 707                              GLbitfield varying_inputs )
 708 {
 709    if (ctx->varying_vp_inputs != varying_inputs) {
 710       ctx->varying_vp_inputs = varying_inputs;
 711       ctx->NewState |= _NEW_ARRAY;
 712       /*printf("%s %x\n", __FUNCTION__, varying_inputs);*/
 713    }
 714 }
 715
 716
 717 /**
 718  * Used by drivers to tell core Mesa that the driver is going to
 719  * install/ use its own vertex program.  In particular, this will
 720  * prevent generated fragment programs from using state vars instead
 721  * of ordinary varyings/inputs.
 722  */
 723 void
 724 _mesa_set_vp_override(struct gl_context *ctx, GLboolean flag)
 725 {
 726    if (ctx->VertexProgram._Overriden != flag) {
 727       ctx->VertexProgram._Overriden = flag;
 728
 729       /* Set one of the bits which will trigger fragment program
 730        * regeneration:
 731        */
 732       ctx->NewState |= _NEW_PROGRAM;
 733    }
 734 }