src/mesa/shader/slang/slang_link.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 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  * \file slang_link.c
  27  * GLSL linker
  28  * \author Brian Paul
  29  */
  30
  31 #include "main/imports.h"
  32 #include "main/context.h"
  33 #include "main/hash.h"
  34 #include "main/macros.h"
  35 #include "shader/program.h"
  36 #include "shader/prog_instruction.h"
  37 #include "shader/prog_parameter.h"
  38 #include "shader/prog_print.h"
  39 #include "shader/prog_statevars.h"
  40 #include "shader/prog_uniform.h"
  41 #include "shader/shader_api.h"
  42 #include "slang_link.h"
  43
  44
  45 /** cast wrapper */
  46 static struct gl_vertex_program *
  47 vertex_program(struct gl_program *prog)
  48 {
  49    assert(prog->Target == GL_VERTEX_PROGRAM_ARB);
  50    return (struct gl_vertex_program *) prog;
  51 }
  52
  53
  54 /** cast wrapper */
  55 static struct gl_fragment_program *
  56 fragment_program(struct gl_program *prog)
  57 {
  58    assert(prog->Target == GL_FRAGMENT_PROGRAM_ARB);
  59    return (struct gl_fragment_program *) prog;
  60 }
  61
  62
  63 /**
  64  * Record a linking error.
  65  */
  66 static void
  67 link_error(struct gl_shader_program *shProg, const char *msg)
  68 {
  69    if (shProg->InfoLog) {
  70       _mesa_free(shProg->InfoLog);
  71    }
  72    shProg->InfoLog = _mesa_strdup(msg);
  73    shProg->LinkStatus = GL_FALSE;
  74 }
  75
  76
  77
  78 /**
  79  * Check if the given bit is either set or clear in both bitfields.
  80  */
  81 static GLboolean
  82 bits_agree(GLbitfield flags1, GLbitfield flags2, GLbitfield bit)
  83 {
  84    return (flags1 & bit) == (flags2 & bit);
  85 }
  86
  87
  88 /**
  89  * Linking varying vars involves rearranging varying vars so that the
  90  * vertex program's output varyings matches the order of the fragment
  91  * program's input varyings.
  92  */
  93 static GLboolean
  94 link_varying_vars(struct gl_shader_program *shProg, struct gl_program *prog)
  95 {
  96    GLuint *map, i, firstVarying, newFile;
  97
  98    map = (GLuint *) malloc(prog->Varying->NumParameters * sizeof(GLuint));
  99    if (!map)
 100       return GL_FALSE;
 101
 102    for (i = 0; i < prog->Varying->NumParameters; i++) {
 103       /* see if this varying is in the linked varying list */
 104       const struct gl_program_parameter *var = prog->Varying->Parameters + i;
 105       GLint j = _mesa_lookup_parameter_index(shProg->Varying, -1, var->Name);
 106       if (j >= 0) {
 107          /* varying is already in list, do some error checking */
 108          const struct gl_program_parameter *v =
 109             &shProg->Varying->Parameters[j];
 110          if (var->Size != v->Size) {
 111             link_error(shProg, "mismatched varying variable types");
 112             return GL_FALSE;
 113          }
 114          if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_CENTROID)) {
 115             char msg[100];
 116             snprintf(msg, sizeof(msg),
 117                      "centroid modifier mismatch for '%s'", var->Name);
 118             link_error(shProg, msg);
 119             return GL_FALSE;
 120          }
 121          if (!bits_agree(var->Flags, v->Flags, PROG_PARAM_BIT_INVARIANT)) {
 122             char msg[100];
 123             snprintf(msg, sizeof(msg),
 124                      "invariant modifier mismatch for '%s'", var->Name);
 125             link_error(shProg, msg);
 126             return GL_FALSE;
 127          }
 128       }
 129       else {
 130          /* not already in linked list */
 131          j = _mesa_add_varying(shProg->Varying, var->Name, var->Size,
 132                                var->Flags);
 133       }
 134
 135       /* map varying[i] to varying[j].
 136        * Note: the loop here takes care of arrays or large (sz>4) vars.
 137        */
 138       {
 139          GLint sz = var->Size;
 140          while (sz > 0) {
 141             /*printf("Link varying from %d to %d\n", i, j);*/
 142             map[i++] = j++;
 143             sz -= 4;
 144          }
 145          i--; /* go back one */
 146       }
 147    }
 148
 149
 150    /* Varying variables are treated like other vertex program outputs
 151     * (and like other fragment program inputs).  The position of the
 152     * first varying differs for vertex/fragment programs...
 153     * Also, replace File=PROGRAM_VARYING with File=PROGRAM_INPUT/OUTPUT.
 154     */
 155    if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
 156       firstVarying = VERT_RESULT_VAR0;
 157       newFile = PROGRAM_OUTPUT;
 158    }
 159    else {
 160       assert(prog->Target == GL_FRAGMENT_PROGRAM_ARB);
 161       firstVarying = FRAG_ATTRIB_VAR0;
 162       newFile = PROGRAM_INPUT;
 163    }
 164
 165    /* OK, now scan the program/shader instructions looking for varying vars,
 166     * replacing the old index with the new index.
 167     */
 168    for (i = 0; i < prog->NumInstructions; i++) {
 169       struct prog_instruction *inst = prog->Instructions + i;
 170       GLuint j;
 171
 172       if (inst->DstReg.File == PROGRAM_VARYING) {
 173          inst->DstReg.File = newFile;
 174          inst->DstReg.Index = map[ inst->DstReg.Index ] + firstVarying;
 175       }
 176
 177       for (j = 0; j < 3; j++) {
 178          if (inst->SrcReg[j].File == PROGRAM_VARYING) {
 179             inst->SrcReg[j].File = newFile;
 180             inst->SrcReg[j].Index = map[ inst->SrcReg[j].Index ] + firstVarying;
 181          }
 182       }
 183    }
 184
 185    free(map);
 186
 187    /* these will get recomputed before linking is completed */
 188    prog->InputsRead = 0x0;
 189    prog->OutputsWritten = 0x0;
 190
 191    return GL_TRUE;
 192 }
 193
 194
 195 /**
 196  * Build the shProg->Uniforms list.
 197  * This is basically a list/index of all uniforms found in either/both of
 198  * the vertex and fragment shaders.
 199  */
 200 static void
 201 link_uniform_vars(struct gl_shader_program *shProg,
 202                   struct gl_program *prog,
 203                   GLuint *numSamplers)
 204 {
 205    GLuint samplerMap[MAX_SAMPLERS];
 206    GLuint i;
 207
 208    for (i = 0; i < prog->Parameters->NumParameters; i++) {
 209       const struct gl_program_parameter *p = prog->Parameters->Parameters + i;
 210
 211       /*
 212        * XXX FIX NEEDED HERE
 213        * We should also be adding a uniform if p->Type == PROGRAM_STATE_VAR.
 214        * For example, modelview matrix, light pos, etc.
 215        * Also, we need to update the state-var name-generator code to
 216        * generate GLSL-style names, like "gl_LightSource[0].position".
 217        * Furthermore, we'll need to fix the state-var's size/datatype info.
 218        */
 219
 220       if ((p->Type == PROGRAM_UNIFORM && p->Used) ||
 221           p->Type == PROGRAM_SAMPLER) {
 222          struct gl_uniform *uniform =
 223             _mesa_append_uniform(shProg->Uniforms, p->Name, prog->Target, i);
 224          if (uniform)
 225             uniform->Initialized = p->Initialized;
 226       }
 227
 228       if (p->Type == PROGRAM_SAMPLER) {
 229          /* Allocate a new sampler index */
 230          GLuint sampNum = *numSamplers;
 231          GLuint oldSampNum = (GLuint) prog->Parameters->ParameterValues[i][0];
 232          assert(oldSampNum < MAX_SAMPLERS);
 233          samplerMap[oldSampNum] = sampNum;
 234          (*numSamplers)++;
 235       }
 236    }
 237
 238
 239    /* OK, now scan the program/shader instructions looking for sampler vars,
 240     * replacing the old index with the new index.
 241     */
 242    prog->SamplersUsed = 0x0;
 243    for (i = 0; i < prog->NumInstructions; i++) {
 244       struct prog_instruction *inst = prog->Instructions + i;
 245       if (_mesa_is_tex_instruction(inst->Opcode)) {
 246          /*
 247          printf("====== remap sampler from %d to %d\n",
 248                 inst->Sampler, map[ inst->Sampler ]);
 249          */
 250          /* here, texUnit is really samplerUnit */
 251          assert(inst->TexSrcUnit < MAX_SAMPLERS);
 252          inst->TexSrcUnit = samplerMap[inst->TexSrcUnit];
 253          prog->SamplerTargets[inst->TexSrcUnit] = inst->TexSrcTarget;
 254          prog->SamplersUsed |= (1 << inst->TexSrcUnit);
 255       }
 256    }
 257
 258 }
 259
 260
 261 /**
 262  * Resolve binding of generic vertex attributes.
 263  * For example, if the vertex shader declared "attribute vec4 foobar" we'll
 264  * allocate a generic vertex attribute for "foobar" and plug that value into
 265  * the vertex program instructions.
 266  * But if the user called glBindAttributeLocation(), those bindings will
 267  * have priority.
 268  */
 269 static GLboolean
 270 _slang_resolve_attributes(struct gl_shader_program *shProg,
 271                           const struct gl_program *origProg,
 272                           struct gl_program *linkedProg)
 273 {
 274    GLint attribMap[MAX_VERTEX_ATTRIBS];
 275    GLuint i, j;
 276    GLbitfield usedAttributes;
 277
 278    assert(origProg != linkedProg);
 279    assert(origProg->Target == GL_VERTEX_PROGRAM_ARB);
 280    assert(linkedProg->Target == GL_VERTEX_PROGRAM_ARB);
 281
 282    if (!shProg->Attributes)
 283       shProg->Attributes = _mesa_new_parameter_list();
 284
 285    if (linkedProg->Attributes) {
 286       _mesa_free_parameter_list(linkedProg->Attributes);
 287    }
 288    linkedProg->Attributes = _mesa_new_parameter_list();
 289
 290
 291    /* Build a bitmask indicating which attribute indexes have been
 292     * explicitly bound by the user with glBindAttributeLocation().
 293     */
 294    usedAttributes = 0x0;
 295    for (i = 0; i < shProg->Attributes->NumParameters; i++) {
 296       GLint attr = shProg->Attributes->Parameters[i].StateIndexes[0];
 297       usedAttributes |= (1 << attr);
 298    }
 299
 300    /* initialize the generic attribute map entries to -1 */
 301    for (i = 0; i < MAX_VERTEX_ATTRIBS; i++) {
 302       attribMap[i] = -1;
 303    }
 304
 305    /*
 306     * Scan program for generic attribute references
 307     */
 308    for (i = 0; i < linkedProg->NumInstructions; i++) {
 309       struct prog_instruction *inst = linkedProg->Instructions + i;
 310       for (j = 0; j < 3; j++) {
 311          if (inst->SrcReg[j].File == PROGRAM_INPUT &&
 312              inst->SrcReg[j].Index >= VERT_ATTRIB_GENERIC0) {
 313             /*
 314              * OK, we've found a generic vertex attribute reference.
 315              */
 316             const GLint k = inst->SrcReg[j].Index - VERT_ATTRIB_GENERIC0;
 317
 318             GLint attr = attribMap[k];
 319
 320             if (attr < 0) {
 321                /* Need to figure out attribute mapping now.
 322                 */
 323                const char *name = origProg->Attributes->Parameters[k].Name;
 324                const GLint size = origProg->Attributes->Parameters[k].Size;
 325                const GLenum type =origProg->Attributes->Parameters[k].DataType;
 326                GLint index;
 327
 328                /* See if there's a user-defined attribute binding for
 329                 * this name.
 330                 */
 331                index = _mesa_lookup_parameter_index(shProg->Attributes,
 332                                                     -1, name);
 333                if (index >= 0) {
 334                   /* Found a user-defined binding */
 335                   attr = shProg->Attributes->Parameters[index].StateIndexes[0];
 336                }
 337                else {
 338                   /* No user-defined binding, choose our own attribute number.
 339                    * Start at 1 since generic attribute 0 always aliases
 340                    * glVertex/position.
 341                    */
 342                   for (attr = 1; attr < MAX_VERTEX_ATTRIBS; attr++) {
 343                      if (((1 << attr) & usedAttributes) == 0)
 344                         break;
 345                   }
 346                   if (attr == MAX_VERTEX_ATTRIBS) {
 347                      link_error(shProg, "Too many vertex attributes");
 348                      return GL_FALSE;
 349                   }
 350
 351                   /* mark this attribute as used */
 352                   usedAttributes |= (1 << attr);
 353                }
 354
 355                attribMap[k] = attr;
 356
 357                /* Save the final name->attrib binding so it can be queried
 358                 * with glGetAttributeLocation().
 359                 */
 360                _mesa_add_attribute(linkedProg->Attributes, name,
 361                                    size, type, attr);
 362             }
 363
 364             assert(attr >= 0);
 365
 366             /* update the instruction's src reg */
 367             inst->SrcReg[j].Index = VERT_ATTRIB_GENERIC0 + attr;
 368          }
 369       }
 370    }
 371
 372    return GL_TRUE;
 373 }
 374
 375
 376 /**
 377  * Scan program instructions to update the program's NumTemporaries field.
 378  * Note: this implemenation relies on the code generator allocating
 379  * temps in increasing order (0, 1, 2, ... ).
 380  */
 381 static void
 382 _slang_count_temporaries(struct gl_program *prog)
 383 {
 384    GLuint i, j;
 385    GLint maxIndex = -1;
 386
 387    for (i = 0; i < prog->NumInstructions; i++) {
 388       const struct prog_instruction *inst = prog->Instructions + i;
 389       const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
 390       for (j = 0; j < numSrc; j++) {
 391          if (inst->SrcReg[j].File == PROGRAM_TEMPORARY) {
 392             if (maxIndex < inst->SrcReg[j].Index)
 393                maxIndex = inst->SrcReg[j].Index;
 394          }
 395          if (inst->DstReg.File == PROGRAM_TEMPORARY) {
 396             if (maxIndex < (GLint) inst->DstReg.Index)
 397                maxIndex = inst->DstReg.Index;
 398          }
 399       }
 400    }
 401
 402    prog->NumTemporaries = (GLuint) (maxIndex + 1);
 403 }
 404
 405
 406 /**
 407  * Scan program instructions to update the program's InputsRead and
 408  * OutputsWritten fields.
 409  */
 410 static void
 411 _slang_update_inputs_outputs(struct gl_program *prog)
 412 {
 413    GLuint i, j;
 414    GLuint maxAddrReg = 0;
 415
 416    prog->InputsRead = 0x0;
 417    prog->OutputsWritten = 0x0;
 418
 419    for (i = 0; i < prog->NumInstructions; i++) {
 420       const struct prog_instruction *inst = prog->Instructions + i;
 421       const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
 422       for (j = 0; j < numSrc; j++) {
 423          if (inst->SrcReg[j].File == PROGRAM_INPUT) {
 424             prog->InputsRead |= 1 << inst->SrcReg[j].Index;
 425             if (prog->Target == GL_FRAGMENT_PROGRAM_ARB &&
 426                 inst->SrcReg[j].Index == FRAG_ATTRIB_FOGC) {
 427                /* The fragment shader FOGC input is used for fog,
 428                 * front-facing and sprite/point coord.
 429                 */
 430                struct gl_fragment_program *fp = fragment_program(prog);
 431                const GLint swz = GET_SWZ(inst->SrcReg[j].Swizzle, 0);
 432                if (swz == SWIZZLE_X)
 433                   fp->UsesFogFragCoord = GL_TRUE;
 434                else if (swz == SWIZZLE_Y)
 435                   fp->UsesFrontFacing = GL_TRUE;
 436                else if (swz == SWIZZLE_Z || swz == SWIZZLE_W)
 437                   fp->UsesPointCoord = GL_TRUE;
 438             }
 439          }
 440          else if (inst->SrcReg[j].File == PROGRAM_ADDRESS) {
 441             maxAddrReg = MAX2(maxAddrReg, (GLuint) (inst->SrcReg[j].Index + 1));
 442          }
 443       }
 444       if (inst->DstReg.File == PROGRAM_OUTPUT) {
 445          prog->OutputsWritten |= 1 << inst->DstReg.Index;
 446       }
 447       else if (inst->DstReg.File == PROGRAM_ADDRESS) {
 448          maxAddrReg = MAX2(maxAddrReg, inst->DstReg.Index + 1);
 449       }
 450    }
 451    prog->NumAddressRegs = maxAddrReg;
 452 }
 453
 454
 455 /**
 456  * Shader linker.  Currently:
 457  *
 458  * 1. The last attached vertex shader and fragment shader are linked.
 459  * 2. Varying vars in the two shaders are combined so their locations
 460  *    agree between the vertex and fragment stages.  They're treated as
 461  *    vertex program output attribs and as fragment program input attribs.
 462  * 3. The vertex and fragment programs are cloned and modified to update
 463  *    src/dst register references so they use the new, linked varying
 464  *    storage locations.
 465  */
 466 void
 467 _slang_link(GLcontext *ctx,
 468             GLhandleARB programObj,
 469             struct gl_shader_program *shProg)
 470 {
 471    const struct gl_vertex_program *vertProg;
 472    const struct gl_fragment_program *fragProg;
 473    GLuint numSamplers = 0;
 474    GLuint i;
 475
 476    _mesa_clear_shader_program_data(ctx, shProg);
 477
 478    /* check that all programs compiled successfully */
 479    for (i = 0; i < shProg->NumShaders; i++) {
 480       if (!shProg->Shaders[i]->CompileStatus) {
 481          link_error(shProg, "linking with uncompiled shader\n");
 482          return;
 483       }
 484    }
 485
 486    shProg->Uniforms = _mesa_new_uniform_list();
 487    shProg->Varying = _mesa_new_parameter_list();
 488
 489    /**
 490     * Find attached vertex, fragment shaders defining main()
 491     */
 492    vertProg = NULL;
 493    fragProg = NULL;
 494    for (i = 0; i < shProg->NumShaders; i++) {
 495       struct gl_shader *shader = shProg->Shaders[i];
 496       if (shader->Type == GL_VERTEX_SHADER) {
 497          if (shader->Main)
 498             vertProg = vertex_program(shader->Program);
 499       }
 500       else if (shader->Type == GL_FRAGMENT_SHADER) {
 501          if (shader->Main)
 502             fragProg = fragment_program(shader->Program);
 503       }
 504       else {
 505          _mesa_problem(ctx, "unexpected shader target in slang_link()");
 506       }
 507    }
 508
 509 #if FEATURE_es2_glsl
 510    /* must have both a vertex and fragment program for ES2 */
 511    if (!vertProg) {
 512       link_error(shProg, "missing vertex shader\n");
 513       return;
 514    }
 515    if (!fragProg) {
 516       link_error(shProg, "missing fragment shader\n");
 517       return;
 518    }
 519 #endif
 520
 521    /*
 522     * Make copies of the vertex/fragment programs now since we'll be
 523     * changing src/dst registers after merging the uniforms and varying vars.
 524     */
 525    _mesa_reference_vertprog(ctx, &shProg->VertexProgram, NULL);
 526    if (vertProg) {
 527       struct gl_vertex_program *linked_vprog =
 528          vertex_program(_mesa_clone_program(ctx, &vertProg->Base));
 529       shProg->VertexProgram = linked_vprog; /* refcount OK */
 530       ASSERT(shProg->VertexProgram->Base.RefCount == 1);
 531    }
 532
 533    _mesa_reference_fragprog(ctx, &shProg->FragmentProgram, NULL);
 534    if (fragProg) {
 535       struct gl_fragment_program *linked_fprog =
 536          fragment_program(_mesa_clone_program(ctx, &fragProg->Base));
 537       shProg->FragmentProgram = linked_fprog; /* refcount OK */
 538       ASSERT(shProg->FragmentProgram->Base.RefCount == 1);
 539    }
 540
 541    /* link varying vars */
 542    if (shProg->VertexProgram) {
 543       if (!link_varying_vars(shProg, &shProg->VertexProgram->Base))
 544          return;
 545    }
 546    if (shProg->FragmentProgram) {
 547       if (!link_varying_vars(shProg, &shProg->FragmentProgram->Base))
 548          return;
 549    }
 550
 551    /* link uniform vars */
 552    if (shProg->VertexProgram)
 553       link_uniform_vars(shProg, &shProg->VertexProgram->Base, &numSamplers);
 554    if (shProg->FragmentProgram)
 555       link_uniform_vars(shProg, &shProg->FragmentProgram->Base, &numSamplers);
 556
 557    /*_mesa_print_uniforms(shProg->Uniforms);*/
 558
 559    if (shProg->VertexProgram) {
 560       if (!_slang_resolve_attributes(shProg, &vertProg->Base,
 561                                      &shProg->VertexProgram->Base)) {
 562          return;
 563       }
 564    }
 565
 566    if (shProg->VertexProgram) {
 567       _slang_update_inputs_outputs(&shProg->VertexProgram->Base);
 568       _slang_count_temporaries(&shProg->VertexProgram->Base);
 569       if (!(shProg->VertexProgram->Base.OutputsWritten & (1 << VERT_RESULT_HPOS))) {
 570          /* the vertex program did not compute a vertex position */
 571          link_error(shProg,
 572                     "gl_Position was not written by vertex shader\n");
 573          return;
 574       }
 575    }
 576    if (shProg->FragmentProgram) {
 577       _slang_count_temporaries(&shProg->FragmentProgram->Base);
 578       _slang_update_inputs_outputs(&shProg->FragmentProgram->Base);
 579    }
 580
 581    /* Check that all the varying vars needed by the fragment shader are
 582     * actually produced by the vertex shader.
 583     */
 584    if (shProg->FragmentProgram) {
 585       const GLbitfield varyingRead
 586          = shProg->FragmentProgram->Base.InputsRead >> FRAG_ATTRIB_VAR0;
 587       const GLbitfield varyingWritten = shProg->VertexProgram ?
 588          shProg->VertexProgram->Base.OutputsWritten >> VERT_RESULT_VAR0 : 0x0;
 589       if ((varyingRead & varyingWritten) != varyingRead) {
 590          link_error(shProg,
 591           "Fragment program using varying vars not written by vertex shader\n");
 592          return;
 593       }
 594    }
 595
 596
 597    if (fragProg && shProg->FragmentProgram) {
 598       /* Compute initial program's TexturesUsed info */
 599       _mesa_update_shader_textures_used(&shProg->FragmentProgram->Base);
 600
 601       /* notify driver that a new fragment program has been compiled/linked */
 602       ctx->Driver.ProgramStringNotify(ctx, GL_FRAGMENT_PROGRAM_ARB,
 603                                       &shProg->FragmentProgram->Base);
 604       if (MESA_VERBOSE & VERBOSE_GLSL_DUMP) {
 605          printf("Mesa original fragment program:\n");
 606          _mesa_print_program(&fragProg->Base);
 607          _mesa_print_program_parameters(ctx, &fragProg->Base);
 608
 609          printf("Mesa post-link fragment program:\n");
 610          _mesa_print_program(&shProg->FragmentProgram->Base);
 611          _mesa_print_program_parameters(ctx, &shProg->FragmentProgram->Base);
 612       }
 613    }
 614
 615    if (vertProg && shProg->VertexProgram) {
 616       /* Compute initial program's TexturesUsed info */
 617       _mesa_update_shader_textures_used(&shProg->VertexProgram->Base);
 618
 619       /* notify driver that a new vertex program has been compiled/linked */
 620       ctx->Driver.ProgramStringNotify(ctx, GL_VERTEX_PROGRAM_ARB,
 621                                       &shProg->VertexProgram->Base);
 622       if (MESA_VERBOSE & VERBOSE_GLSL_DUMP) {
 623          printf("Mesa original vertex program:\n");
 624          _mesa_print_program(&vertProg->Base);
 625          _mesa_print_program_parameters(ctx, &vertProg->Base);
 626
 627          printf("Mesa post-link vertex program:\n");
 628          _mesa_print_program(&shProg->VertexProgram->Base);
 629          _mesa_print_program_parameters(ctx, &shProg->VertexProgram->Base);
 630       }
 631    }
 632
 633    if (MESA_VERBOSE & VERBOSE_GLSL_DUMP) {
 634       printf("Varying vars:\n");
 635       _mesa_print_parameter_list(shProg->Varying);
 636    }
 637
 638    shProg->LinkStatus = (shProg->VertexProgram || shProg->FragmentProgram);
 639 }
 640