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 *vsProg = ctx->Shader.CurrentVertexProgram;
 251    const struct gl_shader_program *gsProg = ctx->Shader.CurrentGeometryProgram;
 252    const struct gl_shader_program *fsProg = ctx->Shader.CurrentFragmentProgram;
 253    const struct gl_vertex_program *prevVP = ctx->VertexProgram._Current;
 254    const struct gl_fragment_program *prevFP = ctx->FragmentProgram._Current;
 255    const struct gl_geometry_program *prevGP = ctx->GeometryProgram._Current;
 256    GLbitfield new_state = 0x0;
 257
 258    /*
 259     * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current
 260     * pointers to the programs that should be used for rendering.  If either
 261     * is NULL, use fixed-function code paths.
 262     *
 263     * These programs may come from several sources.  The priority is as
 264     * follows:
 265     *   1. OpenGL 2.0/ARB vertex/fragment shaders
 266     *   2. ARB/NV vertex/fragment programs
 267     *   3. Programs derived from fixed-function state.
 268     *
 269     * Note: it's possible for a vertex shader to get used with a fragment
 270     * program (and vice versa) here, but in practice that shouldn't ever
 271     * come up, or matter.
 272     */
 273
 274    if (fsProg && fsProg->LinkStatus && fsProg->FragmentProgram) {
 275       /* Use shader programs */
 276       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 277                                fsProg->FragmentProgram);
 278    }
 279    else if (ctx->FragmentProgram._Enabled) {
 280       /* use user-defined vertex program */
 281       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 282                                ctx->FragmentProgram.Current);
 283    }
 284    else if (ctx->FragmentProgram._MaintainTexEnvProgram) {
 285       /* Use fragment program generated from fixed-function state.
 286        */
 287       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current,
 288                                _mesa_get_fixed_func_fragment_program(ctx));
 289       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._TexEnvProgram,
 290                                ctx->FragmentProgram._Current);
 291    }
 292    else {
 293       /* no fragment program */
 294       _mesa_reference_fragprog(ctx, &ctx->FragmentProgram._Current, NULL);
 295    }
 296
 297    if (gsProg && gsProg->LinkStatus && gsProg->GeometryProgram) {
 298       /* Use shader programs */
 299       _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current,
 300                                gsProg->GeometryProgram);
 301    } else {
 302       /* no fragment program */
 303       _mesa_reference_geomprog(ctx, &ctx->GeometryProgram._Current, NULL);
 304    }
 305
 306    /* Examine vertex program after fragment program as
 307     * _mesa_get_fixed_func_vertex_program() needs to know active
 308     * fragprog inputs.
 309     */
 310    if (vsProg && vsProg->LinkStatus && vsProg->VertexProgram) {
 311       /* Use shader programs */
 312       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 313                             vsProg->VertexProgram);
 314    }
 315    else if (ctx->VertexProgram._Enabled) {
 316       /* use user-defined vertex program */
 317       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 318                                ctx->VertexProgram.Current);
 319    }
 320    else if (ctx->VertexProgram._MaintainTnlProgram) {
 321       /* Use vertex program generated from fixed-function state.
 322        */
 323       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current,
 324                                _mesa_get_fixed_func_vertex_program(ctx));
 325       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._TnlProgram,
 326                                ctx->VertexProgram._Current);
 327    }
 328    else {
 329       /* no vertex program */
 330       _mesa_reference_vertprog(ctx, &ctx->VertexProgram._Current, NULL);
 331    }
 332
 333    /* Let the driver know what's happening:
 334     */
 335    if (ctx->FragmentProgram._Current != prevFP) {
 336       new_state |= _NEW_PROGRAM;
 337       if (ctx->Driver.BindProgram) {
 338          ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB,
 339                           (struct gl_program *) ctx->FragmentProgram._Current);
 340       }
 341    }
 342
 343    if (ctx->GeometryProgram._Current != prevGP) {
 344       new_state |= _NEW_PROGRAM;
 345       if (ctx->Driver.BindProgram) {
 346          ctx->Driver.BindProgram(ctx, MESA_GEOMETRY_PROGRAM,
 347                             (struct gl_program *) ctx->GeometryProgram._Current);
 348       }
 349    }
 350
 351    if (ctx->VertexProgram._Current != prevVP) {
 352       new_state |= _NEW_PROGRAM;
 353       if (ctx->Driver.BindProgram) {
 354          ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
 355                             (struct gl_program *) ctx->VertexProgram._Current);
 356       }
 357    }
 358
 359    return new_state;
 360 }
 361
 362
 363 /**
 364  * Examine shader constants and return either _NEW_PROGRAM_CONSTANTS or 0.
 365  */
 366 static GLbitfield
 367 update_program_constants(struct gl_context *ctx)
 368 {
 369    GLbitfield new_state = 0x0;
 370
 371    if (ctx->FragmentProgram._Current) {
 372       const struct gl_program_parameter_list *params =
 373          ctx->FragmentProgram._Current->Base.Parameters;
 374       if (params && params->StateFlags & ctx->NewState) {
 375          new_state |= _NEW_PROGRAM_CONSTANTS;
 376       }
 377    }
 378
 379    if (ctx->GeometryProgram._Current) {
 380       const struct gl_program_parameter_list *params =
 381          ctx->GeometryProgram._Current->Base.Parameters;
 382       /*FIXME: StateFlags is always 0 because we have unnamed constant
 383        *       not state changes */
 384       if (params /*&& params->StateFlags & ctx->NewState*/) {
 385          new_state |= _NEW_PROGRAM_CONSTANTS;
 386       }
 387    }
 388
 389    if (ctx->VertexProgram._Current) {
 390       const struct gl_program_parameter_list *params =
 391          ctx->VertexProgram._Current->Base.Parameters;
 392       if (params && params->StateFlags & ctx->NewState) {
 393          new_state |= _NEW_PROGRAM_CONSTANTS;
 394       }
 395    }
 396
 397    return new_state;
 398 }
 399
 400
 401
 402
 403 static void
 404 update_viewport_matrix(struct gl_context *ctx)
 405 {
 406    const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
 407
 408    ASSERT(depthMax > 0);
 409
 410    /* Compute scale and bias values. This is really driver-specific
 411     * and should be maintained elsewhere if at all.
 412     * NOTE: RasterPos uses this.
 413     */
 414    _math_matrix_viewport(&ctx->Viewport._WindowMap,
 415                          ctx->Viewport.X, ctx->Viewport.Y,
 416                          ctx->Viewport.Width, ctx->Viewport.Height,
 417                          ctx->Viewport.Near, ctx->Viewport.Far,
 418                          depthMax);
 419 }
 420
 421
 422 /**
 423  * Update derived multisample state.
 424  */
 425 static void
 426 update_multisample(struct gl_context *ctx)
 427 {
 428    ctx->Multisample._Enabled = GL_FALSE;
 429    if (ctx->Multisample.Enabled &&
 430        ctx->DrawBuffer &&
 431        ctx->DrawBuffer->Visual.sampleBuffers)
 432       ctx->Multisample._Enabled = GL_TRUE;
 433 }
 434
 435
 436 /**
 437  * Update derived color/blend/logicop state.
 438  */
 439 static void
 440 update_color(struct gl_context *ctx)
 441 {
 442    /* This is needed to support 1.1's RGB logic ops AND
 443     * 1.0's blending logicops.
 444     */
 445    ctx->Color._LogicOpEnabled = RGBA_LOGICOP_ENABLED(ctx);
 446 }
 447
 448
 449 /*
 450  * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
 451  * in ctx->_TriangleCaps if needed.
 452  */
 453 static void
 454 update_polygon(struct gl_context *ctx)
 455 {
 456    ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
 457
 458    if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 459       ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 460
 461    if (   ctx->Polygon.OffsetPoint
 462        || ctx->Polygon.OffsetLine
 463        || ctx->Polygon.OffsetFill)
 464       ctx->_TriangleCaps |= DD_TRI_OFFSET;
 465 }
 466
 467
 468 /**
 469  * Update the ctx->_TriangleCaps bitfield.
 470  * XXX that bitfield should really go away someday!
 471  * This function must be called after other update_*() functions since
 472  * there are dependencies on some other derived values.
 473  */
 474 #if 0
 475 static void
 476 update_tricaps(struct gl_context *ctx, GLbitfield new_state)
 477 {
 478    ctx->_TriangleCaps = 0;
 479
 480    /*
 481     * Points
 482     */
 483    if (1/*new_state & _NEW_POINT*/) {
 484       if (ctx->Point.SmoothFlag)
 485          ctx->_TriangleCaps |= DD_POINT_SMOOTH;
 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    }
 499
 500    /*
 501     * Polygons
 502     */
 503    if (1/*new_state & _NEW_POLYGON*/) {
 504       if (ctx->Polygon.SmoothFlag)
 505          ctx->_TriangleCaps |= DD_TRI_SMOOTH;
 506       if (ctx->Polygon.StippleFlag)
 507          ctx->_TriangleCaps |= DD_TRI_STIPPLE;
 508       if (ctx->Polygon.FrontMode != GL_FILL
 509           || ctx->Polygon.BackMode != GL_FILL)
 510          ctx->_TriangleCaps |= DD_TRI_UNFILLED;
 511       if (ctx->Polygon.CullFlag
 512           && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 513          ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 514       if (ctx->Polygon.OffsetPoint ||
 515           ctx->Polygon.OffsetLine ||
 516           ctx->Polygon.OffsetFill)
 517          ctx->_TriangleCaps |= DD_TRI_OFFSET;
 518    }
 519
 520    /*
 521     * Lighting and shading
 522     */
 523    if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
 524       ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
 525    if (ctx->Light.ShadeModel == GL_FLAT)
 526       ctx->_TriangleCaps |= DD_FLATSHADE;
 527    if (NEED_SECONDARY_COLOR(ctx))
 528       ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
 529
 530    /*
 531     * Stencil
 532     */
 533    if (ctx->Stencil._TestTwoSide)
 534       ctx->_TriangleCaps |= DD_TRI_TWOSTENCIL;
 535 }
 536 #endif
 537
 538
 539 /**
 540  * Compute derived GL state.
 541  * If __struct gl_contextRec::NewState is non-zero then this function \b must
 542  * be called before rendering anything.
 543  *
 544  * Calls dd_function_table::UpdateState to perform any internal state
 545  * management necessary.
 546  *
 547  * \sa _mesa_update_modelview_project(), _mesa_update_texture(),
 548  * _mesa_update_buffer_bounds(),
 549  * _mesa_update_lighting() and _mesa_update_tnl_spaces().
 550  */
 551 void
 552 _mesa_update_state_locked( struct gl_context *ctx )
 553 {
 554    GLbitfield new_state = ctx->NewState;
 555    GLbitfield prog_flags = _NEW_PROGRAM;
 556    GLbitfield new_prog_state = 0x0;
 557
 558    if (new_state == _NEW_CURRENT_ATTRIB)
 559       goto out;
 560
 561    if (MESA_VERBOSE & VERBOSE_STATE)
 562       _mesa_print_state("_mesa_update_state", new_state);
 563
 564    /* Determine which state flags effect vertex/fragment program state */
 565    if (ctx->FragmentProgram._MaintainTexEnvProgram) {
 566       prog_flags |= (_NEW_BUFFERS | _NEW_TEXTURE | _NEW_FOG |
 567                      _NEW_ARRAY | _NEW_LIGHT | _NEW_POINT | _NEW_RENDERMODE |
 568                      _NEW_PROGRAM);
 569    }
 570    if (ctx->VertexProgram._MaintainTnlProgram) {
 571       prog_flags |= (_NEW_ARRAY | _NEW_TEXTURE | _NEW_TEXTURE_MATRIX |
 572                      _NEW_TRANSFORM | _NEW_POINT |
 573                      _NEW_FOG | _NEW_LIGHT |
 574                      _MESA_NEW_NEED_EYE_COORDS);
 575    }
 576
 577    /*
 578     * Now update derived state info
 579     */
 580
 581    if (new_state & prog_flags)
 582       update_program_enables( ctx );
 583
 584    if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
 585       _mesa_update_modelview_project( ctx, new_state );
 586
 587    if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
 588       _mesa_update_texture( ctx, new_state );
 589
 590    if (new_state & _NEW_BUFFERS)
 591       _mesa_update_framebuffer(ctx);
 592
 593    if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
 594       _mesa_update_draw_buffer_bounds( ctx );
 595
 596    if (new_state & _NEW_POLYGON)
 597       update_polygon( ctx );
 598
 599    if (new_state & _NEW_LIGHT)
 600       _mesa_update_lighting( ctx );
 601
 602    if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
 603       _mesa_update_stencil( ctx );
 604
 605    if (new_state & _MESA_NEW_TRANSFER_STATE)
 606       _mesa_update_pixel( ctx, new_state );
 607
 608    if (new_state & _DD_NEW_SEPARATE_SPECULAR)
 609       update_separate_specular( ctx );
 610
 611    if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
 612       update_viewport_matrix(ctx);
 613
 614    if (new_state & _NEW_MULTISAMPLE)
 615       update_multisample( ctx );
 616
 617    if (new_state & _NEW_COLOR)
 618       update_color( ctx );
 619
 620 #if 0
 621    if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT
 622                     | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))
 623       update_tricaps( ctx, new_state );
 624 #endif
 625
 626    /* ctx->_NeedEyeCoords is now up to date.
 627     *
 628     * If the truth value of this variable has changed, update for the
 629     * new lighting space and recompute the positions of lights and the
 630     * normal transform.
 631     *
 632     * If the lighting space hasn't changed, may still need to recompute
 633     * light positions & normal transforms for other reasons.
 634     */
 635    if (new_state & _MESA_NEW_NEED_EYE_COORDS)
 636       _mesa_update_tnl_spaces( ctx, new_state );
 637
 638    if (new_state & prog_flags) {
 639       /* When we generate programs from fixed-function vertex/fragment state
 640        * this call may generate/bind a new program.  If so, we need to
 641        * propogate the _NEW_PROGRAM flag to the driver.
 642        */
 643       new_prog_state |= update_program( ctx );
 644    }
 645
 646    if (new_state & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT))
 647       update_arrays( ctx );
 648
 649  out:
 650    new_prog_state |= update_program_constants(ctx);
 651
 652    /*
 653     * Give the driver a chance to act upon the new_state flags.
 654     * The driver might plug in different span functions, for example.
 655     * Also, this is where the driver can invalidate the state of any
 656     * active modules (such as swrast_setup, swrast, tnl, etc).
 657     *
 658     * Set ctx->NewState to zero to avoid recursion if
 659     * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
 660     */
 661    new_state = ctx->NewState | new_prog_state;
 662    ctx->NewState = 0;
 663    ctx->Driver.UpdateState(ctx, new_state);
 664    ctx->Array.NewState = 0;
 665 }
 666
 667
 668 /* This is the usual entrypoint for state updates:
 669  */
 670 void
 671 _mesa_update_state( struct gl_context *ctx )
 672 {
 673    _mesa_lock_context_textures(ctx);
 674    _mesa_update_state_locked(ctx);
 675    _mesa_unlock_context_textures(ctx);
 676 }
 677
 678
 679
 680
 681 /**
 682  * Want to figure out which fragment program inputs are actually
 683  * constant/current values from ctx->Current.  These should be
 684  * referenced as a tracked state variable rather than a fragment
 685  * program input, to save the overhead of putting a constant value in
 686  * every submitted vertex, transferring it to hardware, interpolating
 687  * it across the triangle, etc...
 688  *
 689  * When there is a VP bound, just use vp->outputs.  But when we're
 690  * generating vp from fixed function state, basically want to
 691  * calculate:
 692  *
 693  * vp_out_2_fp_in( vp_in_2_vp_out( varying_inputs ) |
 694  *                 potential_vp_outputs )
 695  *
 696  * Where potential_vp_outputs is calculated by looking at enabled
 697  * texgen, etc.
 698  *
 699  * The generated fragment program should then only declare inputs that
 700  * may vary or otherwise differ from the ctx->Current values.
 701  * Otherwise, the fp should track them as state values instead.
 702  */
 703 void
 704 _mesa_set_varying_vp_inputs( struct gl_context *ctx,
 705                              GLbitfield varying_inputs )
 706 {
 707    if (ctx->varying_vp_inputs != varying_inputs) {
 708       ctx->varying_vp_inputs = varying_inputs;
 709       ctx->NewState |= _NEW_ARRAY;
 710       /*printf("%s %x\n", __FUNCTION__, varying_inputs);*/
 711    }
 712 }
 713
 714
 715 /**
 716  * Used by drivers to tell core Mesa that the driver is going to
 717  * install/ use its own vertex program.  In particular, this will
 718  * prevent generated fragment programs from using state vars instead
 719  * of ordinary varyings/inputs.
 720  */
 721 void
 722 _mesa_set_vp_override(struct gl_context *ctx, GLboolean flag)
 723 {
 724    if (ctx->VertexProgram._Overriden != flag) {
 725       ctx->VertexProgram._Overriden = flag;
 726
 727       /* Set one of the bits which will trigger fragment program
 728        * regeneration:
 729        */
 730       ctx->NewState |= _NEW_PROGRAM;
 731    }
 732 }