src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.3
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions 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 MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "glheader.h"
  27 #include "imports.h"
  28 #include "accum.h"
  29 #include "arrayobj.h"
  30 #include "attrib.h"
  31 #include "blend.h"
  32 #include "buffers.h"
  33 #include "bufferobj.h"
  34 #include "clear.h"
  35 #include "colormac.h"
  36 #include "colortab.h"
  37 #include "context.h"
  38 #include "depth.h"
  39 #include "enable.h"
  40 #include "enums.h"
  41 #include "fog.h"
  42 #include "hint.h"
  43 #include "light.h"
  44 #include "lines.h"
  45 #include "matrix.h"
  46 #include "multisample.h"
  47 #include "points.h"
  48 #include "polygon.h"
  49 #include "scissor.h"
  50 #include "simple_list.h"
  51 #include "stencil.h"
  52 #include "texenv.h"
  53 #include "texgen.h"
  54 #include "texobj.h"
  55 #include "texparam.h"
  56 #include "texstate.h"
  57 #include "varray.h"
  58 #include "viewport.h"
  59 #include "mtypes.h"
  60
  61
  62 /**
  63  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  64  */
  65 struct gl_enable_attrib
  66 {
  67    GLboolean AlphaTest;
  68    GLboolean AutoNormal;
  69    GLboolean Blend;
  70    GLbitfield ClipPlanes;
  71    GLboolean ColorMaterial;
  72    GLboolean ColorTable[COLORTABLE_MAX];
  73    GLboolean Convolution1D;
  74    GLboolean Convolution2D;
  75    GLboolean Separable2D;
  76    GLboolean CullFace;
  77    GLboolean DepthTest;
  78    GLboolean Dither;
  79    GLboolean Fog;
  80    GLboolean Histogram;
  81    GLboolean Light[MAX_LIGHTS];
  82    GLboolean Lighting;
  83    GLboolean LineSmooth;
  84    GLboolean LineStipple;
  85    GLboolean IndexLogicOp;
  86    GLboolean ColorLogicOp;
  87
  88    GLboolean Map1Color4;
  89    GLboolean Map1Index;
  90    GLboolean Map1Normal;
  91    GLboolean Map1TextureCoord1;
  92    GLboolean Map1TextureCoord2;
  93    GLboolean Map1TextureCoord3;
  94    GLboolean Map1TextureCoord4;
  95    GLboolean Map1Vertex3;
  96    GLboolean Map1Vertex4;
  97    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
  98    GLboolean Map2Color4;
  99    GLboolean Map2Index;
 100    GLboolean Map2Normal;
 101    GLboolean Map2TextureCoord1;
 102    GLboolean Map2TextureCoord2;
 103    GLboolean Map2TextureCoord3;
 104    GLboolean Map2TextureCoord4;
 105    GLboolean Map2Vertex3;
 106    GLboolean Map2Vertex4;
 107    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 108
 109    GLboolean MinMax;
 110    GLboolean Normalize;
 111    GLboolean PixelTexture;
 112    GLboolean PointSmooth;
 113    GLboolean PolygonOffsetPoint;
 114    GLboolean PolygonOffsetLine;
 115    GLboolean PolygonOffsetFill;
 116    GLboolean PolygonSmooth;
 117    GLboolean PolygonStipple;
 118    GLboolean RescaleNormals;
 119    GLboolean Scissor;
 120    GLboolean Stencil;
 121    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 122    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 123    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 124    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 125    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 126    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 127    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 128
 129    GLbitfield Texture[MAX_TEXTURE_UNITS];
 130    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 131
 132    /* SGI_texture_color_table */
 133    GLboolean TextureColorTable[MAX_TEXTURE_UNITS];
 134
 135    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 136    GLboolean VertexProgram;
 137    GLboolean VertexProgramPointSize;
 138    GLboolean VertexProgramTwoSide;
 139
 140    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 141    GLboolean PointSprite;
 142    GLboolean FragmentShaderATI;
 143 };
 144
 145
 146 /**
 147  * Node for the attribute stack.
 148  */
 149 struct gl_attrib_node
 150 {
 151    GLbitfield kind;
 152    void *data;
 153    struct gl_attrib_node *next;
 154 };
 155
 156
 157
 158 /**
 159  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 160  */
 161 struct texture_state
 162 {
 163    struct gl_texture_attrib Texture;  /**< The usual context state */
 164
 165    /** to save per texture object state (wrap modes, filters, etc): */
 166    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 167
 168    /**
 169     * To save references to texture objects (so they don't get accidentally
 170     * deleted while saved in the attribute stack).
 171     */
 172    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 173 };
 174
 175
 176 /**
 177  * Allocate a new attribute state node.  These nodes have a
 178  * "kind" value and a pointer to a struct of state data.
 179  */
 180 static struct gl_attrib_node *
 181 new_attrib_node( GLbitfield kind )
 182 {
 183    struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
 184    if (an) {
 185       an->kind = kind;
 186    }
 187    return an;
 188 }
 189
 190
 191 void GLAPIENTRY
 192 _mesa_PushAttrib(GLbitfield mask)
 193 {
 194    struct gl_attrib_node *newnode;
 195    struct gl_attrib_node *head;
 196
 197    GET_CURRENT_CONTEXT(ctx);
 198    ASSERT_OUTSIDE_BEGIN_END(ctx);
 199
 200    if (MESA_VERBOSE & VERBOSE_API)
 201       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 202
 203    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 204       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 205       return;
 206    }
 207
 208    /* Build linked list of attribute nodes which save all attribute */
 209    /* groups specified by the mask. */
 210    head = NULL;
 211
 212    if (mask & GL_ACCUM_BUFFER_BIT) {
 213       struct gl_accum_attrib *attr;
 214       attr = MALLOC_STRUCT( gl_accum_attrib );
 215       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 216       newnode = new_attrib_node( GL_ACCUM_BUFFER_BIT );
 217       newnode->data = attr;
 218       newnode->next = head;
 219       head = newnode;
 220    }
 221
 222    if (mask & GL_COLOR_BUFFER_BIT) {
 223       GLuint i;
 224       struct gl_colorbuffer_attrib *attr;
 225       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 226       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 227       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 228       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 229          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 230       newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
 231       newnode->data = attr;
 232       newnode->next = head;
 233       head = newnode;
 234    }
 235
 236    if (mask & GL_CURRENT_BIT) {
 237       struct gl_current_attrib *attr;
 238       FLUSH_CURRENT( ctx, 0 );
 239       attr = MALLOC_STRUCT( gl_current_attrib );
 240       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 241       newnode = new_attrib_node( GL_CURRENT_BIT );
 242       newnode->data = attr;
 243       newnode->next = head;
 244       head = newnode;
 245    }
 246
 247    if (mask & GL_DEPTH_BUFFER_BIT) {
 248       struct gl_depthbuffer_attrib *attr;
 249       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 250       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 251       newnode = new_attrib_node( GL_DEPTH_BUFFER_BIT );
 252       newnode->data = attr;
 253       newnode->next = head;
 254       head = newnode;
 255    }
 256
 257    if (mask & GL_ENABLE_BIT) {
 258       struct gl_enable_attrib *attr;
 259       GLuint i;
 260       attr = MALLOC_STRUCT( gl_enable_attrib );
 261       /* Copy enable flags from all other attributes into the enable struct. */
 262       attr->AlphaTest = ctx->Color.AlphaEnabled;
 263       attr->AutoNormal = ctx->Eval.AutoNormal;
 264       attr->Blend = ctx->Color.BlendEnabled;
 265       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 266       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 267       for (i = 0; i < COLORTABLE_MAX; i++) {
 268          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 269       }
 270       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 271       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 272       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 273       attr->CullFace = ctx->Polygon.CullFlag;
 274       attr->DepthTest = ctx->Depth.Test;
 275       attr->Dither = ctx->Color.DitherFlag;
 276       attr->Fog = ctx->Fog.Enabled;
 277       for (i = 0; i < ctx->Const.MaxLights; i++) {
 278          attr->Light[i] = ctx->Light.Light[i].Enabled;
 279       }
 280       attr->Lighting = ctx->Light.Enabled;
 281       attr->LineSmooth = ctx->Line.SmoothFlag;
 282       attr->LineStipple = ctx->Line.StippleFlag;
 283       attr->Histogram = ctx->Pixel.HistogramEnabled;
 284       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 285       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 286       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 287       attr->Map1Color4 = ctx->Eval.Map1Color4;
 288       attr->Map1Index = ctx->Eval.Map1Index;
 289       attr->Map1Normal = ctx->Eval.Map1Normal;
 290       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 291       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 292       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 293       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 294       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 295       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 296       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 297       attr->Map2Color4 = ctx->Eval.Map2Color4;
 298       attr->Map2Index = ctx->Eval.Map2Index;
 299       attr->Map2Normal = ctx->Eval.Map2Normal;
 300       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 301       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 302       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 303       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 304       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 305       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 306       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 307       attr->Normalize = ctx->Transform.Normalize;
 308       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 309       attr->PointSmooth = ctx->Point.SmoothFlag;
 310       attr->PointSprite = ctx->Point.PointSprite;
 311       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 312       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 313       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 314       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 315       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 316       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 317       attr->Scissor = ctx->Scissor.Enabled;
 318       attr->Stencil = ctx->Stencil.Enabled;
 319       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 320       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 321       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 322       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 323       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 324       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 325       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 326          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 327          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 328          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 329       }
 330       /* GL_NV_vertex_program */
 331       attr->VertexProgram = ctx->VertexProgram.Enabled;
 332       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 333       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 334       newnode = new_attrib_node( GL_ENABLE_BIT );
 335       newnode->data = attr;
 336       newnode->next = head;
 337       head = newnode;
 338    }
 339
 340    if (mask & GL_EVAL_BIT) {
 341       struct gl_eval_attrib *attr;
 342       attr = MALLOC_STRUCT( gl_eval_attrib );
 343       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 344       newnode = new_attrib_node( GL_EVAL_BIT );
 345       newnode->data = attr;
 346       newnode->next = head;
 347       head = newnode;
 348    }
 349
 350    if (mask & GL_FOG_BIT) {
 351       struct gl_fog_attrib *attr;
 352       attr = MALLOC_STRUCT( gl_fog_attrib );
 353       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 354       newnode = new_attrib_node( GL_FOG_BIT );
 355       newnode->data = attr;
 356       newnode->next = head;
 357       head = newnode;
 358    }
 359
 360    if (mask & GL_HINT_BIT) {
 361       struct gl_hint_attrib *attr;
 362       attr = MALLOC_STRUCT( gl_hint_attrib );
 363       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 364       newnode = new_attrib_node( GL_HINT_BIT );
 365       newnode->data = attr;
 366       newnode->next = head;
 367       head = newnode;
 368    }
 369
 370    if (mask & GL_LIGHTING_BIT) {
 371       struct gl_light_attrib *attr;
 372       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 373       attr = MALLOC_STRUCT( gl_light_attrib );
 374       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 375       newnode = new_attrib_node( GL_LIGHTING_BIT );
 376       newnode->data = attr;
 377       newnode->next = head;
 378       head = newnode;
 379    }
 380
 381    if (mask & GL_LINE_BIT) {
 382       struct gl_line_attrib *attr;
 383       attr = MALLOC_STRUCT( gl_line_attrib );
 384       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 385       newnode = new_attrib_node( GL_LINE_BIT );
 386       newnode->data = attr;
 387       newnode->next = head;
 388       head = newnode;
 389    }
 390
 391    if (mask & GL_LIST_BIT) {
 392       struct gl_list_attrib *attr;
 393       attr = MALLOC_STRUCT( gl_list_attrib );
 394       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 395       newnode = new_attrib_node( GL_LIST_BIT );
 396       newnode->data = attr;
 397       newnode->next = head;
 398       head = newnode;
 399    }
 400
 401    if (mask & GL_PIXEL_MODE_BIT) {
 402       struct gl_pixel_attrib *attr;
 403       attr = MALLOC_STRUCT( gl_pixel_attrib );
 404       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 405       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 406       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 407       newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
 408       newnode->data = attr;
 409       newnode->next = head;
 410       head = newnode;
 411    }
 412
 413    if (mask & GL_POINT_BIT) {
 414       struct gl_point_attrib *attr;
 415       attr = MALLOC_STRUCT( gl_point_attrib );
 416       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 417       newnode = new_attrib_node( GL_POINT_BIT );
 418       newnode->data = attr;
 419       newnode->next = head;
 420       head = newnode;
 421    }
 422
 423    if (mask & GL_POLYGON_BIT) {
 424       struct gl_polygon_attrib *attr;
 425       attr = MALLOC_STRUCT( gl_polygon_attrib );
 426       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 427       newnode = new_attrib_node( GL_POLYGON_BIT );
 428       newnode->data = attr;
 429       newnode->next = head;
 430       head = newnode;
 431    }
 432
 433    if (mask & GL_POLYGON_STIPPLE_BIT) {
 434       GLuint *stipple;
 435       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 436       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 437       newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
 438       newnode->data = stipple;
 439       newnode->next = head;
 440       head = newnode;
 441    }
 442
 443    if (mask & GL_SCISSOR_BIT) {
 444       struct gl_scissor_attrib *attr;
 445       attr = MALLOC_STRUCT( gl_scissor_attrib );
 446       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 447       newnode = new_attrib_node( GL_SCISSOR_BIT );
 448       newnode->data = attr;
 449       newnode->next = head;
 450       head = newnode;
 451    }
 452
 453    if (mask & GL_STENCIL_BUFFER_BIT) {
 454       struct gl_stencil_attrib *attr;
 455       attr = MALLOC_STRUCT( gl_stencil_attrib );
 456       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 457       newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
 458       newnode->data = attr;
 459       newnode->next = head;
 460       head = newnode;
 461    }
 462
 463    if (mask & GL_TEXTURE_BIT) {
 464       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 465       GLuint u, tex;
 466
 467       if (!texstate) {
 468          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 469          goto end;
 470       }
 471
 472       _mesa_lock_context_textures(ctx);
 473
 474       /* copy/save the bulk of texture state here */
 475       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 476
 477       /* Save references to the currently bound texture objects so they don't
 478        * accidentally get deleted while referenced in the attribute stack.
 479        */
 480       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 481          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 482             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 483                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 484          }
 485       }
 486
 487       /* copy state/contents of the currently bound texture objects */
 488       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 489          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 490             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 491                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 492          }
 493       }
 494
 495       _mesa_unlock_context_textures(ctx);
 496
 497       newnode = new_attrib_node( GL_TEXTURE_BIT );
 498       newnode->data = texstate;
 499       newnode->next = head;
 500       head = newnode;
 501    }
 502
 503    if (mask & GL_TRANSFORM_BIT) {
 504       struct gl_transform_attrib *attr;
 505       attr = MALLOC_STRUCT( gl_transform_attrib );
 506       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 507       newnode = new_attrib_node( GL_TRANSFORM_BIT );
 508       newnode->data = attr;
 509       newnode->next = head;
 510       head = newnode;
 511    }
 512
 513    if (mask & GL_VIEWPORT_BIT) {
 514       struct gl_viewport_attrib *attr;
 515       attr = MALLOC_STRUCT( gl_viewport_attrib );
 516       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 517       newnode = new_attrib_node( GL_VIEWPORT_BIT );
 518       newnode->data = attr;
 519       newnode->next = head;
 520       head = newnode;
 521    }
 522
 523    /* GL_ARB_multisample */
 524    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 525       struct gl_multisample_attrib *attr;
 526       attr = MALLOC_STRUCT( gl_multisample_attrib );
 527       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 528       newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
 529       newnode->data = attr;
 530       newnode->next = head;
 531       head = newnode;
 532    }
 533
 534 end:
 535    ctx->AttribStack[ctx->AttribStackDepth] = head;
 536    ctx->AttribStackDepth++;
 537 }
 538
 539
 540
 541 static void
 542 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 543 {
 544    GLuint i;
 545
 546 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 547         if ((VALUE) != (NEWVALUE)) {                    \
 548            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 549         }
 550
 551    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 552    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 553
 554    for (i=0;i<MAX_CLIP_PLANES;i++) {
 555       const GLuint mask = 1 << i;
 556       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 557           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 558                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 559    }
 560
 561    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 562                    GL_COLOR_MATERIAL);
 563    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 564                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 565                    GL_COLOR_TABLE);
 566    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 567                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 568                    GL_POST_CONVOLUTION_COLOR_TABLE);
 569    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 570                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 571                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 572    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 573    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 574    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 575    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 576                    GL_CONVOLUTION_1D);
 577    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 578                    GL_CONVOLUTION_2D);
 579    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 580                    GL_SEPARABLE_2D);
 581    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 582    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 583    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 584    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 585                    GL_LINE_STIPPLE);
 586    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 587                    GL_INDEX_LOGIC_OP);
 588    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 589                    GL_COLOR_LOGIC_OP);
 590
 591    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 592    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 593    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 594    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 595                    GL_MAP1_TEXTURE_COORD_1);
 596    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 597                    GL_MAP1_TEXTURE_COORD_2);
 598    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 599                    GL_MAP1_TEXTURE_COORD_3);
 600    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 601                    GL_MAP1_TEXTURE_COORD_4);
 602    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 603                    GL_MAP1_VERTEX_3);
 604    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 605                    GL_MAP1_VERTEX_4);
 606    for (i = 0; i < 16; i++) {
 607       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 608                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 609    }
 610
 611    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 612    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 613    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 614    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 615                    GL_MAP2_TEXTURE_COORD_1);
 616    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 617                    GL_MAP2_TEXTURE_COORD_2);
 618    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 619                    GL_MAP2_TEXTURE_COORD_3);
 620    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 621                    GL_MAP2_TEXTURE_COORD_4);
 622    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 623                    GL_MAP2_VERTEX_3);
 624    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 625                    GL_MAP2_VERTEX_4);
 626    for (i = 0; i < 16; i++) {
 627       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 628                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 629    }
 630
 631    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 632    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 633    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 634                    GL_RESCALE_NORMAL_EXT);
 635    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 636                    enable->RasterPositionUnclipped,
 637                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 638    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 639                    GL_POINT_SMOOTH);
 640    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 641       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 642                       GL_POINT_SPRITE_NV);
 643    }
 644    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 645                    GL_POLYGON_OFFSET_POINT);
 646    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 647                    GL_POLYGON_OFFSET_LINE);
 648    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 649                    GL_POLYGON_OFFSET_FILL);
 650    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 651                    GL_POLYGON_SMOOTH);
 652    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 653                    GL_POLYGON_STIPPLE);
 654    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 655    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 656    if (ctx->Extensions.EXT_stencil_two_side) {
 657       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 658    }
 659    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 660                    GL_MULTISAMPLE_ARB);
 661    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 662                    enable->SampleAlphaToCoverage,
 663                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 664    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 665                    enable->SampleAlphaToOne,
 666                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 667    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 668                    enable->SampleCoverage,
 669                    GL_SAMPLE_COVERAGE_ARB);
 670    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 671                    enable->SampleCoverageInvert,
 672                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 673    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 674    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 675                    enable->VertexProgram,
 676                    GL_VERTEX_PROGRAM_ARB);
 677    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 678                    enable->VertexProgramPointSize,
 679                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 680    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 681                    enable->VertexProgramTwoSide,
 682                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 683
 684 #undef TEST_AND_UPDATE
 685
 686    /* texture unit enables */
 687    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 688       if (ctx->Texture.Unit[i].Enabled != enable->Texture[i]) {
 689          ctx->Texture.Unit[i].Enabled = enable->Texture[i];
 690          if (ctx->Driver.Enable) {
 691             if (ctx->Driver.ActiveTexture) {
 692                (*ctx->Driver.ActiveTexture)(ctx, i);
 693             }
 694             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_1D,
 695                              (GLboolean) (enable->Texture[i] & TEXTURE_1D_BIT) );
 696             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_2D,
 697                              (GLboolean) (enable->Texture[i] & TEXTURE_2D_BIT) );
 698             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_3D,
 699                              (GLboolean) (enable->Texture[i] & TEXTURE_3D_BIT) );
 700             if (ctx->Extensions.ARB_texture_cube_map)
 701                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_CUBE_MAP_ARB,
 702                           (GLboolean) (enable->Texture[i] & TEXTURE_CUBE_BIT) );
 703             if (ctx->Extensions.NV_texture_rectangle)
 704                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_RECTANGLE_NV,
 705                           (GLboolean) (enable->Texture[i] & TEXTURE_RECT_BIT) );
 706          }
 707       }
 708
 709       if (ctx->Texture.Unit[i].TexGenEnabled != enable->TexGen[i]) {
 710          ctx->Texture.Unit[i].TexGenEnabled = enable->TexGen[i];
 711          if (ctx->Driver.Enable) {
 712             if (ctx->Driver.ActiveTexture) {
 713                (*ctx->Driver.ActiveTexture)(ctx, i);
 714             }
 715             if (enable->TexGen[i] & S_BIT)
 716                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_TRUE);
 717             else
 718                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_FALSE);
 719             if (enable->TexGen[i] & T_BIT)
 720                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_TRUE);
 721             else
 722                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_FALSE);
 723             if (enable->TexGen[i] & R_BIT)
 724                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_TRUE);
 725             else
 726                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_FALSE);
 727             if (enable->TexGen[i] & Q_BIT)
 728                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
 729             else
 730                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
 731          }
 732       }
 733
 734       /* GL_SGI_texture_color_table */
 735       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 736    }
 737
 738    if (ctx->Driver.ActiveTexture) {
 739       (*ctx->Driver.ActiveTexture)(ctx, ctx->Texture.CurrentUnit);
 740    }
 741 }
 742
 743
 744 /**
 745  * Pop/restore texture attribute/group state.
 746  */
 747 static void
 748 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 749 {
 750    GLuint u;
 751
 752    _mesa_lock_context_textures(ctx);
 753
 754    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 755       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 756       GLuint tgt;
 757
 758       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 759       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 760                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 761       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 762                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 763       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 764                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 765       if (ctx->Extensions.ARB_texture_cube_map) {
 766          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 767                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 768       }
 769       if (ctx->Extensions.NV_texture_rectangle) {
 770          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 771                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 772       }
 773       if (ctx->Extensions.SGI_texture_color_table) {
 774          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 775                           unit->ColorTableEnabled);
 776       }
 777       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 778       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 779       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 780       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 781       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 782       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 783       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 784       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 785       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 786       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 787       /* Eye plane done differently to avoid re-transformation */
 788       {
 789          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 790          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 791          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 792          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 793          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 794          if (ctx->Driver.TexGen) {
 795             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 796             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 797             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 798             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 799          }
 800       }
 801       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 802                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 803       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 804                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 805       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 806                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 807       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 808                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 809       if (ctx->Extensions.EXT_texture_lod_bias) {
 810          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 811                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 812       }
 813       if (ctx->Extensions.EXT_texture_env_combine ||
 814           ctx->Extensions.ARB_texture_env_combine) {
 815          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 816                        unit->Combine.ModeRGB);
 817          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 818                        unit->Combine.ModeA);
 819          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 820                        unit->Combine.SourceRGB[0]);
 821          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 822                        unit->Combine.SourceRGB[1]);
 823          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 824                        unit->Combine.SourceRGB[2]);
 825          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 826                        unit->Combine.SourceA[0]);
 827          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 828                        unit->Combine.SourceA[1]);
 829          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 830                        unit->Combine.SourceA[2]);
 831          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 832                        unit->Combine.OperandRGB[0]);
 833          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 834                        unit->Combine.OperandRGB[1]);
 835          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 836                        unit->Combine.OperandRGB[2]);
 837          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 838                        unit->Combine.OperandA[0]);
 839          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 840                        unit->Combine.OperandA[1]);
 841          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 842                        unit->Combine.OperandA[2]);
 843          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 844                        1 << unit->Combine.ScaleShiftRGB);
 845          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 846                        1 << unit->Combine.ScaleShiftA);
 847       }
 848
 849       /* Restore texture object state for each target */
 850       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 851          const struct gl_texture_object *obj = NULL;
 852          GLfloat bordColor[4];
 853          GLenum target;
 854
 855          obj = &texstate->SavedObj[u][tgt];
 856
 857          /* don't restore state for unsupported targets to prevent
 858           * raising GL errors.
 859           */
 860          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 861              !ctx->Extensions.ARB_texture_cube_map) {
 862             continue;
 863          }
 864          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 865                   !ctx->Extensions.NV_texture_rectangle) {
 866             continue;
 867          }
 868          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 869                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 870                   !ctx->Extensions.MESA_texture_array) {
 871             continue;
 872          }
 873
 874          target = obj->Target;
 875
 876          _mesa_BindTexture(target, obj->Name);
 877
 878          bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
 879          bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
 880          bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
 881          bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
 882
 883          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
 884          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 885          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 886          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 887          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 888          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 889          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 890          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 891          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 892          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 893          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 894          if (target != GL_TEXTURE_RECTANGLE_ARB)
 895             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 896          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 897             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 898                                 obj->MaxAnisotropy);
 899          }
 900          if (ctx->Extensions.ARB_shadow_ambient) {
 901             _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
 902                                 obj->CompareFailValue);
 903          }
 904       }
 905
 906       /* remove saved references to the texture objects */
 907       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 908          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 909       }
 910    }
 911
 912    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 913
 914    _mesa_unlock_context_textures(ctx);
 915 }
 916
 917
 918 /*
 919  * This function is kind of long just because we have to call a lot
 920  * of device driver functions to update device driver state.
 921  *
 922  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 923  * in order to restore GL state.  This isn't terribly efficient but it
 924  * ensures that dirty flags and any derived state gets updated correctly.
 925  * We could at least check if the value to restore equals the current value
 926  * and then skip the Mesa call.
 927  */
 928 void GLAPIENTRY
 929 _mesa_PopAttrib(void)
 930 {
 931    struct gl_attrib_node *attr, *next;
 932    GET_CURRENT_CONTEXT(ctx);
 933    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 934
 935    if (ctx->AttribStackDepth == 0) {
 936       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 937       return;
 938    }
 939
 940    ctx->AttribStackDepth--;
 941    attr = ctx->AttribStack[ctx->AttribStackDepth];
 942
 943    while (attr) {
 944
 945       if (MESA_VERBOSE & VERBOSE_API) {
 946          _mesa_debug(ctx, "glPopAttrib %s\n",
 947                      _mesa_lookup_enum_by_nr(attr->kind));
 948       }
 949
 950       switch (attr->kind) {
 951          case GL_ACCUM_BUFFER_BIT:
 952             {
 953                const struct gl_accum_attrib *accum;
 954                accum = (const struct gl_accum_attrib *) attr->data;
 955                _mesa_ClearAccum(accum->ClearColor[0],
 956                                 accum->ClearColor[1],
 957                                 accum->ClearColor[2],
 958                                 accum->ClearColor[3]);
 959             }
 960             break;
 961          case GL_COLOR_BUFFER_BIT:
 962             {
 963                const struct gl_colorbuffer_attrib *color;
 964                color = (const struct gl_colorbuffer_attrib *) attr->data;
 965                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 966                _mesa_ClearColor(color->ClearColor[0],
 967                                 color->ClearColor[1],
 968                                 color->ClearColor[2],
 969                                 color->ClearColor[3]);
 970                _mesa_IndexMask(color->IndexMask);
 971                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 972                                (GLboolean) (color->ColorMask[1] != 0),
 973                                (GLboolean) (color->ColorMask[2] != 0),
 974                                (GLboolean) (color->ColorMask[3] != 0));
 975                {
 976                   /* Need to determine if more than one color output is
 977                    * specified.  If so, call glDrawBuffersARB, else call
 978                    * glDrawBuffer().  This is a subtle, but essential point
 979                    * since GL_FRONT (for example) is illegal for the former
 980                    * function, but legal for the later.
 981                    */
 982                   GLboolean multipleBuffers = GL_FALSE;
 983                   GLuint i;
 984
 985                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 986                      if (color->DrawBuffer[i] != GL_NONE) {
 987                         multipleBuffers = GL_TRUE;
 988                         break;
 989                      }
 990                   }
 991                   /* Call the API_level functions, not _mesa_drawbuffers()
 992                    * since we need to do error checking on the pop'd
 993                    * GL_DRAW_BUFFER.
 994                    * Ex: if GL_FRONT were pushed, but we're popping with a
 995                    * user FBO bound, GL_FRONT will be illegal and we'll need
 996                    * to record that error.  Per OpenGL ARB decision.
 997                    */
 998                   if (multipleBuffers)
 999                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
1000                                           color->DrawBuffer);
1001                   else
1002                      _mesa_DrawBuffer(color->DrawBuffer[0]);
1003                }
1004                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
1005                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
1006                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
1007                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
1008                                           color->BlendDstRGB,
1009                                           color->BlendSrcA,
1010                                           color->BlendDstA);
1011                /* This special case is because glBlendEquationSeparateEXT
1012                 * cannot take GL_LOGIC_OP as a parameter.
1013                 */
1014                if ( color->BlendEquationRGB == color->BlendEquationA ) {
1015                   _mesa_BlendEquation(color->BlendEquationRGB);
1016                }
1017                else {
1018                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
1019                                                  color->BlendEquationA);
1020                }
1021                _mesa_BlendColor(color->BlendColor[0],
1022                                 color->BlendColor[1],
1023                                 color->BlendColor[2],
1024                                 color->BlendColor[3]);
1025                _mesa_LogicOp(color->LogicOp);
1026                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
1027                                 color->ColorLogicOpEnabled);
1028                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
1029                                 color->IndexLogicOpEnabled);
1030                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
1031             }
1032             break;
1033          case GL_CURRENT_BIT:
1034             FLUSH_CURRENT( ctx, 0 );
1035             MEMCPY( &ctx->Current, attr->data,
1036                     sizeof(struct gl_current_attrib) );
1037             break;
1038          case GL_DEPTH_BUFFER_BIT:
1039             {
1040                const struct gl_depthbuffer_attrib *depth;
1041                depth = (const struct gl_depthbuffer_attrib *) attr->data;
1042                _mesa_DepthFunc(depth->Func);
1043                _mesa_ClearDepth(depth->Clear);
1044                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
1045                _mesa_DepthMask(depth->Mask);
1046             }
1047             break;
1048          case GL_ENABLE_BIT:
1049             {
1050                const struct gl_enable_attrib *enable;
1051                enable = (const struct gl_enable_attrib *) attr->data;
1052                pop_enable_group(ctx, enable);
1053                ctx->NewState |= _NEW_ALL;
1054             }
1055             break;
1056          case GL_EVAL_BIT:
1057             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
1058             ctx->NewState |= _NEW_EVAL;
1059             break;
1060          case GL_FOG_BIT:
1061             {
1062                const struct gl_fog_attrib *fog;
1063                fog = (const struct gl_fog_attrib *) attr->data;
1064                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1065                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1066                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1067                _mesa_Fogf(GL_FOG_START, fog->Start);
1068                _mesa_Fogf(GL_FOG_END, fog->End);
1069                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1070                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1071             }
1072             break;
1073          case GL_HINT_BIT:
1074             {
1075                const struct gl_hint_attrib *hint;
1076                hint = (const struct gl_hint_attrib *) attr->data;
1077                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1078                           hint->PerspectiveCorrection );
1079                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1080                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1081                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1082                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1083                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1084                           hint->ClipVolumeClipping);
1085                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1086                           hint->TextureCompression);
1087             }
1088             break;
1089          case GL_LIGHTING_BIT:
1090             {
1091                GLuint i;
1092                const struct gl_light_attrib *light;
1093                light = (const struct gl_light_attrib *) attr->data;
1094                /* lighting enable */
1095                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1096                /* per-light state */
1097                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1098                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1099
1100                for (i = 0; i < ctx->Const.MaxLights; i++) {
1101                   const struct gl_light *l = &light->Light[i];
1102                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1103                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1104                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1105                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1106                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1107                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->EyeDirection);
1108                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1109                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1110                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1111                               &l->ConstantAttenuation);
1112                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1113                               &l->LinearAttenuation);
1114                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1115                               &l->QuadraticAttenuation);
1116                }
1117                /* light model */
1118                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1119                                   light->Model.Ambient);
1120                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1121                                  (GLfloat) light->Model.LocalViewer);
1122                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1123                                  (GLfloat) light->Model.TwoSide);
1124                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1125                                  (GLfloat) light->Model.ColorControl);
1126                /* shade model */
1127                _mesa_ShadeModel(light->ShadeModel);
1128                /* color material */
1129                _mesa_ColorMaterial(light->ColorMaterialFace,
1130                                    light->ColorMaterialMode);
1131                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1132                                 light->ColorMaterialEnabled);
1133                /* materials */
1134                MEMCPY(&ctx->Light.Material, &light->Material,
1135                       sizeof(struct gl_material));
1136             }
1137             break;
1138          case GL_LINE_BIT:
1139             {
1140                const struct gl_line_attrib *line;
1141                line = (const struct gl_line_attrib *) attr->data;
1142                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1143                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1144                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1145                _mesa_LineWidth(line->Width);
1146             }
1147             break;
1148          case GL_LIST_BIT:
1149             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1150             break;
1151          case GL_PIXEL_MODE_BIT:
1152             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1153             /* XXX what other pixel state needs to be set by function calls? */
1154             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1155             ctx->NewState |= _NEW_PIXEL;
1156             break;
1157          case GL_POINT_BIT:
1158             {
1159                const struct gl_point_attrib *point;
1160                point = (const struct gl_point_attrib *) attr->data;
1161                _mesa_PointSize(point->Size);
1162                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1163                if (ctx->Extensions.EXT_point_parameters) {
1164                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1165                                          point->Params);
1166                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1167                                         point->MinSize);
1168                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1169                                         point->MaxSize);
1170                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1171                                         point->Threshold);
1172                }
1173                if (ctx->Extensions.NV_point_sprite
1174                    || ctx->Extensions.ARB_point_sprite) {
1175                   GLuint u;
1176                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1177                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1178                                    (GLint) point->CoordReplace[u]);
1179                   }
1180                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1181                   if (ctx->Extensions.NV_point_sprite)
1182                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1183                                            ctx->Point.SpriteRMode);
1184                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1185                                         (GLfloat)ctx->Point.SpriteOrigin);
1186                }
1187             }
1188             break;
1189          case GL_POLYGON_BIT:
1190             {
1191                const struct gl_polygon_attrib *polygon;
1192                polygon = (const struct gl_polygon_attrib *) attr->data;
1193                _mesa_CullFace(polygon->CullFaceMode);
1194                _mesa_FrontFace(polygon->FrontFace);
1195                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1196                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1197                _mesa_PolygonOffset(polygon->OffsetFactor,
1198                                    polygon->OffsetUnits);
1199                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1200                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1201                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1202                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1203                                 polygon->OffsetPoint);
1204                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1205                                 polygon->OffsetLine);
1206                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1207                                 polygon->OffsetFill);
1208             }
1209             break;
1210          case GL_POLYGON_STIPPLE_BIT:
1211             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1212             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1213             if (ctx->Driver.PolygonStipple)
1214                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1215             break;
1216          case GL_SCISSOR_BIT:
1217             {
1218                const struct gl_scissor_attrib *scissor;
1219                scissor = (const struct gl_scissor_attrib *) attr->data;
1220                _mesa_Scissor(scissor->X, scissor->Y,
1221                              scissor->Width, scissor->Height);
1222                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1223             }
1224             break;
1225          case GL_STENCIL_BUFFER_BIT:
1226             {
1227                const struct gl_stencil_attrib *stencil;
1228                stencil = (const struct gl_stencil_attrib *) attr->data;
1229                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1230                _mesa_ClearStencil(stencil->Clear);
1231                if (ctx->Extensions.EXT_stencil_two_side) {
1232                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1233                                    stencil->TestTwoSide);
1234                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1235                                              ? GL_BACK : GL_FRONT);
1236                }
1237                /* front state */
1238                _mesa_StencilFuncSeparate(GL_FRONT,
1239                                          stencil->Function[0],
1240                                          stencil->Ref[0],
1241                                          stencil->ValueMask[0]);
1242                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1243                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1244                                        stencil->ZFailFunc[0],
1245                                        stencil->ZPassFunc[0]);
1246                /* back state */
1247                _mesa_StencilFuncSeparate(GL_BACK,
1248                                          stencil->Function[1],
1249                                          stencil->Ref[1],
1250                                          stencil->ValueMask[1]);
1251                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1252                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1253                                        stencil->ZFailFunc[1],
1254                                        stencil->ZPassFunc[1]);
1255             }
1256             break;
1257          case GL_TRANSFORM_BIT:
1258             {
1259                GLuint i;
1260                const struct gl_transform_attrib *xform;
1261                xform = (const struct gl_transform_attrib *) attr->data;
1262                _mesa_MatrixMode(xform->MatrixMode);
1263                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1264                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1265
1266                /* restore clip planes */
1267                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1268                   const GLuint mask = 1 << 1;
1269                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1270                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1271                   if (xform->ClipPlanesEnabled & mask) {
1272                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1273                   }
1274                   else {
1275                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1276                   }
1277                   if (ctx->Driver.ClipPlane)
1278                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1279                }
1280
1281                /* normalize/rescale */
1282                if (xform->Normalize != ctx->Transform.Normalize)
1283                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1284                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1285                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1286                                    ctx->Transform.RescaleNormals);
1287             }
1288             break;
1289          case GL_TEXTURE_BIT:
1290             /* Take care of texture object reference counters */
1291             {
1292                struct texture_state *texstate
1293                   = (struct texture_state *) attr->data;
1294                pop_texture_group(ctx, texstate);
1295                ctx->NewState |= _NEW_TEXTURE;
1296             }
1297             break;
1298          case GL_VIEWPORT_BIT:
1299             {
1300                const struct gl_viewport_attrib *vp;
1301                vp = (const struct gl_viewport_attrib *) attr->data;
1302                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1303                _mesa_DepthRange(vp->Near, vp->Far);
1304             }
1305             break;
1306          case GL_MULTISAMPLE_BIT_ARB:
1307             {
1308                const struct gl_multisample_attrib *ms;
1309                ms = (const struct gl_multisample_attrib *) attr->data;
1310                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1311                                        ms->SampleCoverageInvert);
1312             }
1313             break;
1314
1315          default:
1316             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1317             break;
1318       }
1319
1320       next = attr->next;
1321       FREE( attr->data );
1322       FREE( attr );
1323       attr = next;
1324    }
1325 }
1326
1327
1328 /**
1329  * Helper for incrementing/decrementing vertex buffer object reference
1330  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1331  */
1332 static void
1333 adjust_buffer_object_ref_counts(struct gl_array_attrib *array, GLint step)
1334 {
1335    GLuint i;
1336    array->ArrayObj->Vertex.BufferObj->RefCount += step;
1337    array->ArrayObj->Normal.BufferObj->RefCount += step;
1338    array->ArrayObj->Color.BufferObj->RefCount += step;
1339    array->ArrayObj->SecondaryColor.BufferObj->RefCount += step;
1340    array->ArrayObj->FogCoord.BufferObj->RefCount += step;
1341    array->ArrayObj->Index.BufferObj->RefCount += step;
1342    array->ArrayObj->EdgeFlag.BufferObj->RefCount += step;
1343    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
1344       array->ArrayObj->TexCoord[i].BufferObj->RefCount += step;
1345    for (i = 0; i < VERT_ATTRIB_MAX; i++)
1346       array->ArrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1347 }
1348
1349
1350 /**
1351  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1352  * object refcounts.
1353  */
1354 static void
1355 copy_pixelstore(GLcontext *ctx,
1356                 struct gl_pixelstore_attrib *dst,
1357                 const struct gl_pixelstore_attrib *src)
1358 {
1359    dst->Alignment = src->Alignment;
1360    dst->RowLength = src->RowLength;
1361    dst->SkipPixels = src->SkipPixels;
1362    dst->SkipRows = src->SkipRows;
1363    dst->ImageHeight = src->ImageHeight;
1364    dst->SkipImages = src->SkipImages;
1365    dst->SwapBytes = src->SwapBytes;
1366    dst->LsbFirst = src->LsbFirst;
1367    dst->ClientStorage = src->ClientStorage;
1368    dst->Invert = src->Invert;
1369    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1370 }
1371
1372
1373 #define GL_CLIENT_PACK_BIT (1<<20)
1374 #define GL_CLIENT_UNPACK_BIT (1<<21)
1375
1376
1377 void GLAPIENTRY
1378 _mesa_PushClientAttrib(GLbitfield mask)
1379 {
1380    struct gl_attrib_node *newnode;
1381    struct gl_attrib_node *head;
1382
1383    GET_CURRENT_CONTEXT(ctx);
1384    ASSERT_OUTSIDE_BEGIN_END(ctx);
1385
1386    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1387       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1388       return;
1389    }
1390
1391    /* Build linked list of attribute nodes which save all attribute
1392     * groups specified by the mask.
1393     */
1394    head = NULL;
1395
1396    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1397       struct gl_pixelstore_attrib *attr;
1398       /* packing attribs */
1399       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1400       copy_pixelstore(ctx, attr, &ctx->Pack);
1401       newnode = new_attrib_node( GL_CLIENT_PACK_BIT );
1402       newnode->data = attr;
1403       newnode->next = head;
1404       head = newnode;
1405       /* unpacking attribs */
1406       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1407       copy_pixelstore(ctx, attr, &ctx->Unpack);
1408       newnode = new_attrib_node( GL_CLIENT_UNPACK_BIT );
1409       newnode->data = attr;
1410       newnode->next = head;
1411       head = newnode;
1412    }
1413
1414    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1415       struct gl_array_attrib *attr;
1416       struct gl_array_object *obj;
1417
1418       attr = MALLOC_STRUCT( gl_array_attrib );
1419       obj = MALLOC_STRUCT( gl_array_object );
1420
1421 #if FEATURE_ARB_vertex_buffer_object
1422       /* increment ref counts since we're copying pointers to these objects */
1423       ctx->Array.ArrayBufferObj->RefCount++;
1424       ctx->Array.ElementArrayBufferObj->RefCount++;
1425 #endif
1426
1427       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1428       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1429
1430       attr->ArrayObj = obj;
1431
1432       newnode = new_attrib_node( GL_CLIENT_VERTEX_ARRAY_BIT );
1433       newnode->data = attr;
1434       newnode->next = head;
1435       head = newnode;
1436       /* bump reference counts on buffer objects */
1437       adjust_buffer_object_ref_counts(&ctx->Array, 1);
1438    }
1439
1440    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1441    ctx->ClientAttribStackDepth++;
1442 }
1443
1444
1445
1446
1447 void GLAPIENTRY
1448 _mesa_PopClientAttrib(void)
1449 {
1450    struct gl_attrib_node *node, *next;
1451
1452    GET_CURRENT_CONTEXT(ctx);
1453    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1454
1455    if (ctx->ClientAttribStackDepth == 0) {
1456       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1457       return;
1458    }
1459
1460    ctx->ClientAttribStackDepth--;
1461    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1462
1463    while (node) {
1464       switch (node->kind) {
1465          case GL_CLIENT_PACK_BIT:
1466             {
1467                struct gl_pixelstore_attrib *store =
1468                   (struct gl_pixelstore_attrib *) node->data;
1469                copy_pixelstore(ctx, &ctx->Pack, store);
1470                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1471             }
1472             ctx->NewState |= _NEW_PACKUNPACK;
1473             break;
1474          case GL_CLIENT_UNPACK_BIT:
1475             {
1476                struct gl_pixelstore_attrib *store =
1477                   (struct gl_pixelstore_attrib *) node->data;
1478                copy_pixelstore(ctx, &ctx->Unpack, store);
1479                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1480             }
1481             ctx->NewState |= _NEW_PACKUNPACK;
1482             break;
1483          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1484             struct gl_array_attrib * data =
1485               (struct gl_array_attrib *) node->data;
1486
1487             adjust_buffer_object_ref_counts(&ctx->Array, -1);
1488
1489             ctx->Array.ActiveTexture = data->ActiveTexture;
1490             if (data->LockCount != 0)
1491                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1492             else if (ctx->Array.LockCount)
1493                _mesa_UnlockArraysEXT();
1494
1495             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1496
1497 #if FEATURE_ARB_vertex_buffer_object
1498             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1499                                 data->ArrayBufferObj->Name);
1500             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1501                                 data->ElementArrayBufferObj->Name);
1502 #endif
1503
1504             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1505                     sizeof( struct gl_array_object ) );
1506
1507             FREE( data->ArrayObj );
1508
1509             /* FIXME: Should some bits in ctx->Array->NewState also be set
1510              * FIXME: here?  It seems like it should be set to inclusive-or
1511              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1512              */
1513
1514             ctx->NewState |= _NEW_ARRAY;
1515             break;
1516          }
1517          default:
1518             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1519             break;
1520       }
1521
1522       next = node->next;
1523       FREE( node->data );
1524       FREE( node );
1525       node = next;
1526    }
1527 }
1528
1529
1530 /**
1531  * Free any attribute state data that might be attached to the context.
1532  */
1533 void
1534 _mesa_free_attrib_data(GLcontext *ctx)
1535 {
1536    while (ctx->AttribStackDepth > 0) {
1537       struct gl_attrib_node *attr, *next;
1538
1539       ctx->AttribStackDepth--;
1540       attr = ctx->AttribStack[ctx->AttribStackDepth];
1541
1542       while (attr) {
1543          if (attr->kind == GL_TEXTURE_BIT) {
1544             struct texture_state *texstate = (struct texture_state*)attr->data;
1545             GLuint u, tgt;
1546             /* clear references to the saved texture objects */
1547             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1548                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1549                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1550                }
1551             }
1552          }
1553          else {
1554             /* any other chunks of state that requires special handling? */
1555          }
1556
1557          next = attr->next;
1558          _mesa_free(attr->data);
1559          _mesa_free(attr);
1560          attr = next;
1561       }
1562    }
1563 }
1564
1565
1566 void _mesa_init_attrib( GLcontext *ctx )
1567 {
1568    /* Renderer and client attribute stacks */
1569    ctx->AttribStackDepth = 0;
1570    ctx->ClientAttribStackDepth = 0;
1571 }