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