src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * 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 "context.h"
  37 #include "depth.h"
  38 #include "enable.h"
  39 #include "enums.h"
  40 #include "fog.h"
  41 #include "hint.h"
  42 #include "light.h"
  43 #include "lines.h"
  44 #include "macros.h"
  45 #include "matrix.h"
  46 #include "multisample.h"
  47 #include "points.h"
  48 #include "polygon.h"
  49 #include "shared.h"
  50 #include "scissor.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 #include "main/dispatch.h"
  61 #include "hash.h"
  62 #include <stdbool.h>
  63
  64
  65 /**
  66  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  67  */
  68 struct gl_enable_attrib
  69 {
  70    GLboolean AlphaTest;
  71    GLboolean AutoNormal;
  72    GLboolean Blend;
  73    GLbitfield ClipPlanes;
  74    GLboolean ColorMaterial;
  75    GLboolean CullFace;
  76    GLboolean DepthClamp;
  77    GLboolean DepthTest;
  78    GLboolean Dither;
  79    GLboolean Fog;
  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 Map2Color4;
  97    GLboolean Map2Index;
  98    GLboolean Map2Normal;
  99    GLboolean Map2TextureCoord1;
 100    GLboolean Map2TextureCoord2;
 101    GLboolean Map2TextureCoord3;
 102    GLboolean Map2TextureCoord4;
 103    GLboolean Map2Vertex3;
 104    GLboolean Map2Vertex4;
 105
 106    GLboolean Normalize;
 107    GLboolean PixelTexture;
 108    GLboolean PointSmooth;
 109    GLboolean PolygonOffsetPoint;
 110    GLboolean PolygonOffsetLine;
 111    GLboolean PolygonOffsetFill;
 112    GLboolean PolygonSmooth;
 113    GLboolean PolygonStipple;
 114    GLboolean RescaleNormals;
 115    GLboolean Scissor;
 116    GLboolean Stencil;
 117    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 118    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 119    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 120    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 121    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 122    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 123
 124    GLbitfield Texture[MAX_TEXTURE_UNITS];
 125    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 126
 127    /* GL_ARB_vertex_program */
 128    GLboolean VertexProgram;
 129    GLboolean VertexProgramPointSize;
 130    GLboolean VertexProgramTwoSide;
 131
 132    /* GL_ARB_fragment_program */
 133    GLboolean FragmentProgram;
 134
 135    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 136    GLboolean PointSprite;
 137    GLboolean FragmentShaderATI;
 138
 139    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 140    GLboolean sRGBEnabled;
 141 };
 142
 143
 144 /**
 145  * Node for the attribute stack.
 146  */
 147 struct gl_attrib_node
 148 {
 149    GLbitfield kind;
 150    void *data;
 151    struct gl_attrib_node *next;
 152 };
 153
 154
 155
 156 /**
 157  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 158  */
 159 struct texture_state
 160 {
 161    struct gl_texture_attrib Texture;  /**< The usual context state */
 162
 163    /** to save per texture object state (wrap modes, filters, etc): */
 164    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 165
 166    /**
 167     * To save references to texture objects (so they don't get accidentally
 168     * deleted while saved in the attribute stack).
 169     */
 170    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 171
 172    /* We need to keep a reference to the shared state.  That's where the
 173     * default texture objects are kept.  We don't want that state to be
 174     * freed while the attribute stack contains pointers to any default
 175     * texture objects.
 176     */
 177    struct gl_shared_state *SharedRef;
 178 };
 179
 180
 181 /**
 182  * Allocate new attribute node of given type/kind.  Attach payload data.
 183  * Insert it into the linked list named by 'head'.
 184  */
 185 static void
 186 save_attrib_data(struct gl_attrib_node **head,
 187                  GLbitfield kind, void *payload)
 188 {
 189    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 190    if (n) {
 191       n->kind = kind;
 192       n->data = payload;
 193       /* insert at head */
 194       n->next = *head;
 195       *head = n;
 196    }
 197    else {
 198       /* out of memory! */
 199    }
 200 }
 201
 202
 203 void GLAPIENTRY
 204 _mesa_PushAttrib(GLbitfield mask)
 205 {
 206    struct gl_attrib_node *head;
 207
 208    GET_CURRENT_CONTEXT(ctx);
 209
 210    if (MESA_VERBOSE & VERBOSE_API)
 211       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 212
 213    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 214       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 215       return;
 216    }
 217
 218    /* Build linked list of attribute nodes which save all attribute */
 219    /* groups specified by the mask. */
 220    head = NULL;
 221
 222    if (mask & GL_ACCUM_BUFFER_BIT) {
 223       struct gl_accum_attrib *attr;
 224       attr = MALLOC_STRUCT( gl_accum_attrib );
 225       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 226       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 227    }
 228
 229    if (mask & GL_COLOR_BUFFER_BIT) {
 230       GLuint i;
 231       struct gl_colorbuffer_attrib *attr;
 232       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 233       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 234       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 235       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 236          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 237       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 238    }
 239
 240    if (mask & GL_CURRENT_BIT) {
 241       struct gl_current_attrib *attr;
 242       FLUSH_CURRENT( ctx, 0 );
 243       attr = MALLOC_STRUCT( gl_current_attrib );
 244       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 245       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 246    }
 247
 248    if (mask & GL_DEPTH_BUFFER_BIT) {
 249       struct gl_depthbuffer_attrib *attr;
 250       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 251       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 252       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 253    }
 254
 255    if (mask & GL_ENABLE_BIT) {
 256       struct gl_enable_attrib *attr;
 257       GLuint i;
 258       attr = MALLOC_STRUCT( gl_enable_attrib );
 259       /* Copy enable flags from all other attributes into the enable struct. */
 260       attr->AlphaTest = ctx->Color.AlphaEnabled;
 261       attr->AutoNormal = ctx->Eval.AutoNormal;
 262       attr->Blend = ctx->Color.BlendEnabled;
 263       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 264       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 265       attr->CullFace = ctx->Polygon.CullFlag;
 266       attr->DepthClamp = ctx->Transform.DepthClamp;
 267       attr->DepthTest = ctx->Depth.Test;
 268       attr->Dither = ctx->Color.DitherFlag;
 269       attr->Fog = ctx->Fog.Enabled;
 270       for (i = 0; i < ctx->Const.MaxLights; i++) {
 271          attr->Light[i] = ctx->Light.Light[i].Enabled;
 272       }
 273       attr->Lighting = ctx->Light.Enabled;
 274       attr->LineSmooth = ctx->Line.SmoothFlag;
 275       attr->LineStipple = ctx->Line.StippleFlag;
 276       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 277       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 278       attr->Map1Color4 = ctx->Eval.Map1Color4;
 279       attr->Map1Index = ctx->Eval.Map1Index;
 280       attr->Map1Normal = ctx->Eval.Map1Normal;
 281       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 282       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 283       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 284       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 285       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 286       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 287       attr->Map2Color4 = ctx->Eval.Map2Color4;
 288       attr->Map2Index = ctx->Eval.Map2Index;
 289       attr->Map2Normal = ctx->Eval.Map2Normal;
 290       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 291       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 292       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 293       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 294       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 295       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 296       attr->Normalize = ctx->Transform.Normalize;
 297       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 298       attr->PointSmooth = ctx->Point.SmoothFlag;
 299       attr->PointSprite = ctx->Point.PointSprite;
 300       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 301       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 302       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 303       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 304       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 305       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 306       attr->Scissor = ctx->Scissor.Enabled;
 307       attr->Stencil = ctx->Stencil.Enabled;
 308       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 309       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 310       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 311       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 312       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 313       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 314          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 315          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 316       }
 317       /* GL_ARB_vertex_program */
 318       attr->VertexProgram = ctx->VertexProgram.Enabled;
 319       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 320       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 321
 322       /* GL_ARB_fragment_program */
 323       attr->FragmentProgram = ctx->FragmentProgram.Enabled;
 324
 325       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 326
 327       /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 328       attr->sRGBEnabled = ctx->Color.sRGBEnabled;
 329    }
 330
 331    if (mask & GL_EVAL_BIT) {
 332       struct gl_eval_attrib *attr;
 333       attr = MALLOC_STRUCT( gl_eval_attrib );
 334       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 335       save_attrib_data(&head, GL_EVAL_BIT, attr);
 336    }
 337
 338    if (mask & GL_FOG_BIT) {
 339       struct gl_fog_attrib *attr;
 340       attr = MALLOC_STRUCT( gl_fog_attrib );
 341       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 342       save_attrib_data(&head, GL_FOG_BIT, attr);
 343    }
 344
 345    if (mask & GL_HINT_BIT) {
 346       struct gl_hint_attrib *attr;
 347       attr = MALLOC_STRUCT( gl_hint_attrib );
 348       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 349       save_attrib_data(&head, GL_HINT_BIT, attr);
 350    }
 351
 352    if (mask & GL_LIGHTING_BIT) {
 353       struct gl_light_attrib *attr;
 354       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 355       attr = MALLOC_STRUCT( gl_light_attrib );
 356       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 357       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 358    }
 359
 360    if (mask & GL_LINE_BIT) {
 361       struct gl_line_attrib *attr;
 362       attr = MALLOC_STRUCT( gl_line_attrib );
 363       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 364       save_attrib_data(&head, GL_LINE_BIT, attr);
 365    }
 366
 367    if (mask & GL_LIST_BIT) {
 368       struct gl_list_attrib *attr;
 369       attr = MALLOC_STRUCT( gl_list_attrib );
 370       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 371       save_attrib_data(&head, GL_LIST_BIT, attr);
 372    }
 373
 374    if (mask & GL_PIXEL_MODE_BIT) {
 375       struct gl_pixel_attrib *attr;
 376       attr = MALLOC_STRUCT( gl_pixel_attrib );
 377       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 378       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 379       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 380       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 381    }
 382
 383    if (mask & GL_POINT_BIT) {
 384       struct gl_point_attrib *attr;
 385       attr = MALLOC_STRUCT( gl_point_attrib );
 386       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 387       save_attrib_data(&head, GL_POINT_BIT, attr);
 388    }
 389
 390    if (mask & GL_POLYGON_BIT) {
 391       struct gl_polygon_attrib *attr;
 392       attr = MALLOC_STRUCT( gl_polygon_attrib );
 393       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 394       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 395    }
 396
 397    if (mask & GL_POLYGON_STIPPLE_BIT) {
 398       GLuint *stipple;
 399       stipple = malloc( 32*sizeof(GLuint) );
 400       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 401       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 402    }
 403
 404    if (mask & GL_SCISSOR_BIT) {
 405       struct gl_scissor_attrib *attr;
 406       attr = MALLOC_STRUCT( gl_scissor_attrib );
 407       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 408       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 409    }
 410
 411    if (mask & GL_STENCIL_BUFFER_BIT) {
 412       struct gl_stencil_attrib *attr;
 413       attr = MALLOC_STRUCT( gl_stencil_attrib );
 414       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 415       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 416    }
 417
 418    if (mask & GL_TEXTURE_BIT) {
 419       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 420       GLuint u, tex;
 421
 422       if (!texstate) {
 423          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 424          goto end;
 425       }
 426
 427       _mesa_lock_context_textures(ctx);
 428
 429       /* copy/save the bulk of texture state here */
 430       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 431
 432       /* Save references to the currently bound texture objects so they don't
 433        * accidentally get deleted while referenced in the attribute stack.
 434        */
 435       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 436          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 437             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 438                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 439          }
 440       }
 441
 442       /* copy state/contents of the currently bound texture objects */
 443       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 444          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 445             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 446                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 447          }
 448       }
 449
 450       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 451
 452       _mesa_unlock_context_textures(ctx);
 453
 454       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 455    }
 456
 457    if (mask & GL_TRANSFORM_BIT) {
 458       struct gl_transform_attrib *attr;
 459       attr = MALLOC_STRUCT( gl_transform_attrib );
 460       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 461       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 462    }
 463
 464    if (mask & GL_VIEWPORT_BIT) {
 465       struct gl_viewport_attrib *attr;
 466       attr = MALLOC_STRUCT( gl_viewport_attrib );
 467       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 468       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 469    }
 470
 471    /* GL_ARB_multisample */
 472    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 473       struct gl_multisample_attrib *attr;
 474       attr = MALLOC_STRUCT( gl_multisample_attrib );
 475       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 476       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 477    }
 478
 479 end:
 480    ctx->AttribStack[ctx->AttribStackDepth] = head;
 481    ctx->AttribStackDepth++;
 482 }
 483
 484
 485
 486 static void
 487 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 488 {
 489    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 490    GLuint i;
 491
 492 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 493         if ((VALUE) != (NEWVALUE)) {                    \
 494            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 495         }
 496
 497    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 498    if (ctx->Color.BlendEnabled != enable->Blend) {
 499       if (ctx->Extensions.EXT_draw_buffers2) {
 500          GLuint i;
 501          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 502             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 503          }
 504       }
 505       else {
 506          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 507       }
 508    }
 509
 510    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 511       const GLuint mask = 1 << i;
 512       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 513           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 514                            !!(enable->ClipPlanes & mask));
 515    }
 516
 517    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 518                    GL_COLOR_MATERIAL);
 519    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 520    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 521                    GL_DEPTH_CLAMP);
 522    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 523    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 524    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 525    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 526    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 527    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 528                    GL_LINE_STIPPLE);
 529    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 530                    GL_INDEX_LOGIC_OP);
 531    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 532                    GL_COLOR_LOGIC_OP);
 533
 534    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 535    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 536    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 537    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 538                    GL_MAP1_TEXTURE_COORD_1);
 539    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 540                    GL_MAP1_TEXTURE_COORD_2);
 541    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 542                    GL_MAP1_TEXTURE_COORD_3);
 543    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 544                    GL_MAP1_TEXTURE_COORD_4);
 545    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 546                    GL_MAP1_VERTEX_3);
 547    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 548                    GL_MAP1_VERTEX_4);
 549
 550    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 551    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 552    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 553    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 554                    GL_MAP2_TEXTURE_COORD_1);
 555    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 556                    GL_MAP2_TEXTURE_COORD_2);
 557    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 558                    GL_MAP2_TEXTURE_COORD_3);
 559    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 560                    GL_MAP2_TEXTURE_COORD_4);
 561    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 562                    GL_MAP2_VERTEX_3);
 563    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 564                    GL_MAP2_VERTEX_4);
 565
 566    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 567    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 568    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 569                    GL_RESCALE_NORMAL_EXT);
 570    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 571                    enable->RasterPositionUnclipped,
 572                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 573    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 574                    GL_POINT_SMOOTH);
 575    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 576       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 577                       GL_POINT_SPRITE_NV);
 578    }
 579    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 580                    GL_POLYGON_OFFSET_POINT);
 581    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 582                    GL_POLYGON_OFFSET_LINE);
 583    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 584                    GL_POLYGON_OFFSET_FILL);
 585    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 586                    GL_POLYGON_SMOOTH);
 587    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 588                    GL_POLYGON_STIPPLE);
 589    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 590    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 591    if (ctx->Extensions.EXT_stencil_two_side) {
 592       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 593    }
 594    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 595                    GL_MULTISAMPLE_ARB);
 596    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 597                    enable->SampleAlphaToCoverage,
 598                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 599    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 600                    enable->SampleAlphaToOne,
 601                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 602    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 603                    enable->SampleCoverage,
 604                    GL_SAMPLE_COVERAGE_ARB);
 605    /* GL_ARB_vertex_program */
 606    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 607                    enable->VertexProgram,
 608                    GL_VERTEX_PROGRAM_ARB);
 609    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 610                    enable->VertexProgramPointSize,
 611                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 612    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 613                    enable->VertexProgramTwoSide,
 614                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 615
 616    /* GL_ARB_fragment_program */
 617    TEST_AND_UPDATE(ctx->FragmentProgram.Enabled,
 618                    enable->FragmentProgram,
 619                    GL_FRAGMENT_PROGRAM_ARB);
 620
 621    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 622    TEST_AND_UPDATE(ctx->Color.sRGBEnabled, enable->sRGBEnabled,
 623                    GL_FRAMEBUFFER_SRGB);
 624
 625    /* texture unit enables */
 626    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 627       const GLbitfield enabled = enable->Texture[i];
 628       const GLbitfield genEnabled = enable->TexGen[i];
 629
 630       if (ctx->Texture.Unit[i].Enabled != enabled) {
 631          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 632
 633          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 634          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 635          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 636          if (ctx->Extensions.NV_texture_rectangle) {
 637             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 638                              !!(enabled & TEXTURE_RECT_BIT));
 639          }
 640          if (ctx->Extensions.ARB_texture_cube_map) {
 641             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 642                              !!(enabled & TEXTURE_CUBE_BIT));
 643          }
 644       }
 645
 646       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 647          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 648          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 649          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 650          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 651          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 652       }
 653    }
 654
 655    _mesa_ActiveTexture(GL_TEXTURE0 + curTexUnitSave);
 656 }
 657
 658
 659 /**
 660  * Pop/restore texture attribute/group state.
 661  */
 662 static void
 663 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 664 {
 665    GLuint u;
 666
 667    _mesa_lock_context_textures(ctx);
 668
 669    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 670       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 671       GLuint tgt;
 672
 673       _mesa_ActiveTexture(GL_TEXTURE0_ARB + u);
 674       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 675       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 676       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 677       if (ctx->Extensions.ARB_texture_cube_map) {
 678          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 679                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 680       }
 681       if (ctx->Extensions.NV_texture_rectangle) {
 682          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 683                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 684       }
 685       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 686       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 687       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 688       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 689       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 690       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 691       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 692       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 693       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 694       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 695       /* Eye plane done differently to avoid re-transformation */
 696       {
 697          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 698          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 699          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 700          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 701          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 702          if (ctx->Driver.TexGen) {
 703             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 704             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 705             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 706             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 707          }
 708       }
 709       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 710       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 711       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 712       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 713       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 714                     unit->LodBias);
 715       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 716                     unit->Combine.ModeRGB);
 717       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 718                     unit->Combine.ModeA);
 719       {
 720          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 721          GLuint i;
 722          for (i = 0; i < n; i++) {
 723             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 724                           unit->Combine.SourceRGB[i]);
 725             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 726                           unit->Combine.SourceA[i]);
 727             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 728                           unit->Combine.OperandRGB[i]);
 729             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 730                           unit->Combine.OperandA[i]);
 731          }
 732       }
 733       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 734                     1 << unit->Combine.ScaleShiftRGB);
 735       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 736                     1 << unit->Combine.ScaleShiftA);
 737
 738       /* Restore texture object state for each target */
 739       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 740          const struct gl_texture_object *obj = NULL;
 741          const struct gl_sampler_object *samp;
 742          GLenum target;
 743
 744          obj = &texstate->SavedObj[u][tgt];
 745
 746          /* don't restore state for unsupported targets to prevent
 747           * raising GL errors.
 748           */
 749          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 750              !ctx->Extensions.ARB_texture_cube_map) {
 751             continue;
 752          }
 753          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 754                   !ctx->Extensions.NV_texture_rectangle) {
 755             continue;
 756          }
 757          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 758                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 759                   !ctx->Extensions.EXT_texture_array) {
 760             continue;
 761          }
 762          else if (obj->Target == GL_TEXTURE_CUBE_MAP_ARRAY &&
 763              !ctx->Extensions.ARB_texture_cube_map_array) {
 764             continue;
 765          } else if (obj->Target == GL_TEXTURE_BUFFER)
 766             continue;
 767          else if (obj->Target == GL_TEXTURE_EXTERNAL_OES)
 768             continue;
 769          else if (obj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 770                   obj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY)
 771             continue;
 772
 773          target = obj->Target;
 774
 775          _mesa_BindTexture(target, obj->Name);
 776
 777          samp = &obj->Sampler;
 778
 779          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 780          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 781          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 782          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 783          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 784          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 785          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 786          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 787          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 788          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 789          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 790          if (target != GL_TEXTURE_RECTANGLE_ARB)
 791             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 792          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 793             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 794                                 samp->MaxAnisotropy);
 795          }
 796          if (ctx->Extensions.ARB_shadow) {
 797             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE,
 798                                 samp->CompareMode);
 799             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_FUNC,
 800                                 samp->CompareFunc);
 801          }
 802          if (ctx->Extensions.ARB_depth_texture)
 803             _mesa_TexParameteri(target, GL_DEPTH_TEXTURE_MODE, obj->DepthMode);
 804       }
 805
 806       /* remove saved references to the texture objects */
 807       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 808          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 809       }
 810    }
 811
 812    _mesa_ActiveTexture(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 813
 814    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 815
 816    _mesa_unlock_context_textures(ctx);
 817 }
 818
 819
 820 /*
 821  * This function is kind of long just because we have to call a lot
 822  * of device driver functions to update device driver state.
 823  *
 824  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 825  * in order to restore GL state.  This isn't terribly efficient but it
 826  * ensures that dirty flags and any derived state gets updated correctly.
 827  * We could at least check if the value to restore equals the current value
 828  * and then skip the Mesa call.
 829  */
 830 void GLAPIENTRY
 831 _mesa_PopAttrib(void)
 832 {
 833    struct gl_attrib_node *attr, *next;
 834    GET_CURRENT_CONTEXT(ctx);
 835    FLUSH_VERTICES(ctx, 0);
 836
 837    if (ctx->AttribStackDepth == 0) {
 838       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 839       return;
 840    }
 841
 842    ctx->AttribStackDepth--;
 843    attr = ctx->AttribStack[ctx->AttribStackDepth];
 844
 845    while (attr) {
 846
 847       if (MESA_VERBOSE & VERBOSE_API) {
 848          _mesa_debug(ctx, "glPopAttrib %s\n",
 849                      _mesa_lookup_enum_by_nr(attr->kind));
 850       }
 851
 852       switch (attr->kind) {
 853          case GL_ACCUM_BUFFER_BIT:
 854             {
 855                const struct gl_accum_attrib *accum;
 856                accum = (const struct gl_accum_attrib *) attr->data;
 857                _mesa_ClearAccum(accum->ClearColor[0],
 858                                 accum->ClearColor[1],
 859                                 accum->ClearColor[2],
 860                                 accum->ClearColor[3]);
 861             }
 862             break;
 863          case GL_COLOR_BUFFER_BIT:
 864             {
 865                const struct gl_colorbuffer_attrib *color;
 866
 867                color = (const struct gl_colorbuffer_attrib *) attr->data;
 868                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 869                _mesa_ClearColor(color->ClearColor.f[0],
 870                                 color->ClearColor.f[1],
 871                                 color->ClearColor.f[2],
 872                                 color->ClearColor.f[3]);
 873                _mesa_IndexMask(color->IndexMask);
 874                if (!ctx->Extensions.EXT_draw_buffers2) {
 875                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 876                                   (GLboolean) (color->ColorMask[0][1] != 0),
 877                                   (GLboolean) (color->ColorMask[0][2] != 0),
 878                                   (GLboolean) (color->ColorMask[0][3] != 0));
 879                }
 880                else {
 881                   GLuint i;
 882                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 883                      _mesa_ColorMaski(i,
 884                                   (GLboolean) (color->ColorMask[i][0] != 0),
 885                                   (GLboolean) (color->ColorMask[i][1] != 0),
 886                                   (GLboolean) (color->ColorMask[i][2] != 0),
 887                                   (GLboolean) (color->ColorMask[i][3] != 0));
 888                   }
 889                }
 890                {
 891                   /* Need to determine if more than one color output is
 892                    * specified.  If so, call glDrawBuffersARB, else call
 893                    * glDrawBuffer().  This is a subtle, but essential point
 894                    * since GL_FRONT (for example) is illegal for the former
 895                    * function, but legal for the later.
 896                    */
 897                   GLboolean multipleBuffers = GL_FALSE;
 898                   GLuint i;
 899
 900                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 901                      if (color->DrawBuffer[i] != GL_NONE) {
 902                         multipleBuffers = GL_TRUE;
 903                         break;
 904                      }
 905                   }
 906                   /* Call the API_level functions, not _mesa_drawbuffers()
 907                    * since we need to do error checking on the pop'd
 908                    * GL_DRAW_BUFFER.
 909                    * Ex: if GL_FRONT were pushed, but we're popping with a
 910                    * user FBO bound, GL_FRONT will be illegal and we'll need
 911                    * to record that error.  Per OpenGL ARB decision.
 912                    */
 913                   if (multipleBuffers)
 914                      _mesa_DrawBuffers(ctx->Const.MaxDrawBuffers,
 915                                           color->DrawBuffer);
 916                   else
 917                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 918                }
 919                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 920                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 921                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 922                   if (ctx->Extensions.EXT_draw_buffers2) {
 923                      GLuint i;
 924                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 925                         _mesa_set_enablei(ctx, GL_BLEND, i,
 926                                           (color->BlendEnabled >> i) & 1);
 927                      }
 928                   }
 929                   else {
 930                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 931                   }
 932                }
 933                if (ctx->Color._BlendFuncPerBuffer ||
 934                    ctx->Color._BlendEquationPerBuffer) {
 935                   /* set blend per buffer */
 936                   GLuint buf;
 937                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
 938                      _mesa_BlendFuncSeparateiARB(buf, color->Blend[buf].SrcRGB,
 939                                               color->Blend[buf].DstRGB,
 940                                               color->Blend[buf].SrcA,
 941                                               color->Blend[buf].DstA);
 942                      _mesa_BlendEquationSeparateiARB(buf,
 943                                                   color->Blend[buf].EquationRGB,
 944                                                   color->Blend[buf].EquationA);
 945                   }
 946                }
 947                else {
 948                   /* set same blend modes for all buffers */
 949                   _mesa_BlendFuncSeparate(color->Blend[0].SrcRGB,
 950                                              color->Blend[0].DstRGB,
 951                                              color->Blend[0].SrcA,
 952                                              color->Blend[0].DstA);
 953                   /* This special case is because glBlendEquationSeparateEXT
 954                    * cannot take GL_LOGIC_OP as a parameter.
 955                    */
 956                   if (color->Blend[0].EquationRGB ==
 957                       color->Blend[0].EquationA) {
 958                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
 959                   }
 960                   else {
 961                      _mesa_BlendEquationSeparate(
 962                                                  color->Blend[0].EquationRGB,
 963                                                  color->Blend[0].EquationA);
 964                   }
 965                }
 966                _mesa_BlendColor(color->BlendColorUnclamped[0],
 967                                 color->BlendColorUnclamped[1],
 968                                 color->BlendColorUnclamped[2],
 969                                 color->BlendColorUnclamped[3]);
 970                _mesa_LogicOp(color->LogicOp);
 971                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 972                                 color->ColorLogicOpEnabled);
 973                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 974                                 color->IndexLogicOpEnabled);
 975                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 976                if (ctx->Extensions.ARB_color_buffer_float)
 977                   _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR_ARB,
 978                                    color->ClampFragmentColor);
 979                _mesa_ClampColor(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 980
 981                /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 982                if (ctx->Extensions.EXT_framebuffer_sRGB)
 983                   _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB, color->sRGBEnabled);
 984             }
 985             break;
 986          case GL_CURRENT_BIT:
 987             FLUSH_CURRENT( ctx, 0 );
 988             memcpy( &ctx->Current, attr->data,
 989                     sizeof(struct gl_current_attrib) );
 990             break;
 991          case GL_DEPTH_BUFFER_BIT:
 992             {
 993                const struct gl_depthbuffer_attrib *depth;
 994                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 995                _mesa_DepthFunc(depth->Func);
 996                _mesa_ClearDepth(depth->Clear);
 997                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 998                _mesa_DepthMask(depth->Mask);
 999             }
1000             break;
1001          case GL_ENABLE_BIT:
1002             {
1003                const struct gl_enable_attrib *enable;
1004                enable = (const struct gl_enable_attrib *) attr->data;
1005                pop_enable_group(ctx, enable);
1006                ctx->NewState |= _NEW_ALL;
1007             }
1008             break;
1009          case GL_EVAL_BIT:
1010             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
1011             ctx->NewState |= _NEW_EVAL;
1012             break;
1013          case GL_FOG_BIT:
1014             {
1015                const struct gl_fog_attrib *fog;
1016                fog = (const struct gl_fog_attrib *) attr->data;
1017                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1018                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1019                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1020                _mesa_Fogf(GL_FOG_START, fog->Start);
1021                _mesa_Fogf(GL_FOG_END, fog->End);
1022                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1023                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1024             }
1025             break;
1026          case GL_HINT_BIT:
1027             {
1028                const struct gl_hint_attrib *hint;
1029                hint = (const struct gl_hint_attrib *) attr->data;
1030                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1031                           hint->PerspectiveCorrection );
1032                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1033                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1034                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1035                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1036                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1037                           hint->TextureCompression);
1038             }
1039             break;
1040          case GL_LIGHTING_BIT:
1041             {
1042                GLuint i;
1043                const struct gl_light_attrib *light;
1044                light = (const struct gl_light_attrib *) attr->data;
1045                /* lighting enable */
1046                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1047                /* per-light state */
1048                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1049                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1050
1051                for (i = 0; i < ctx->Const.MaxLights; i++) {
1052                   const struct gl_light *l = &light->Light[i];
1053                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1054                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1055                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1056                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1057                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1058                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1059                   {
1060                      GLfloat p[4] = { 0 };
1061                      p[0] = l->SpotExponent;
1062                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1063                   }
1064                   {
1065                      GLfloat p[4] = { 0 };
1066                      p[0] = l->SpotCutoff;
1067                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1068                   }
1069                   {
1070                      GLfloat p[4] = { 0 };
1071                      p[0] = l->ConstantAttenuation;
1072                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1073                   }
1074                   {
1075                      GLfloat p[4] = { 0 };
1076                      p[0] = l->LinearAttenuation;
1077                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1078                   }
1079                   {
1080                      GLfloat p[4] = { 0 };
1081                      p[0] = l->QuadraticAttenuation;
1082                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1083                   }
1084                }
1085                /* light model */
1086                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1087                                   light->Model.Ambient);
1088                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1089                                  (GLfloat) light->Model.LocalViewer);
1090                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1091                                  (GLfloat) light->Model.TwoSide);
1092                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1093                                  (GLfloat) light->Model.ColorControl);
1094                /* shade model */
1095                _mesa_ShadeModel(light->ShadeModel);
1096                /* color material */
1097                _mesa_ColorMaterial(light->ColorMaterialFace,
1098                                    light->ColorMaterialMode);
1099                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1100                                 light->ColorMaterialEnabled);
1101                /* materials */
1102                memcpy(&ctx->Light.Material, &light->Material,
1103                       sizeof(struct gl_material));
1104                if (ctx->Extensions.ARB_color_buffer_float) {
1105                   _mesa_ClampColor(GL_CLAMP_VERTEX_COLOR_ARB,
1106                                    light->ClampVertexColor);
1107                }
1108             }
1109             break;
1110          case GL_LINE_BIT:
1111             {
1112                const struct gl_line_attrib *line;
1113                line = (const struct gl_line_attrib *) attr->data;
1114                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1115                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1116                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1117                _mesa_LineWidth(line->Width);
1118             }
1119             break;
1120          case GL_LIST_BIT:
1121             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1122             break;
1123          case GL_PIXEL_MODE_BIT:
1124             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1125             /* XXX what other pixel state needs to be set by function calls? */
1126             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1127             ctx->NewState |= _NEW_PIXEL;
1128             break;
1129          case GL_POINT_BIT:
1130             {
1131                const struct gl_point_attrib *point;
1132                point = (const struct gl_point_attrib *) attr->data;
1133                _mesa_PointSize(point->Size);
1134                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1135                if (ctx->Extensions.EXT_point_parameters) {
1136                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1137                                          point->Params);
1138                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1139                                         point->MinSize);
1140                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1141                                         point->MaxSize);
1142                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1143                                         point->Threshold);
1144                }
1145                if (ctx->Extensions.NV_point_sprite
1146                    || ctx->Extensions.ARB_point_sprite) {
1147                   GLuint u;
1148                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1149                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1150                                    (GLint) point->CoordReplace[u]);
1151                   }
1152                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1153                   if (ctx->Extensions.NV_point_sprite)
1154                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1155                                            ctx->Point.SpriteRMode);
1156
1157                   if ((ctx->API == API_OPENGL_COMPAT && ctx->Version >= 20)
1158                       || ctx->API == API_OPENGL_CORE)
1159                      _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1160                                            (GLfloat)ctx->Point.SpriteOrigin);
1161                }
1162             }
1163             break;
1164          case GL_POLYGON_BIT:
1165             {
1166                const struct gl_polygon_attrib *polygon;
1167                polygon = (const struct gl_polygon_attrib *) attr->data;
1168                _mesa_CullFace(polygon->CullFaceMode);
1169                _mesa_FrontFace(polygon->FrontFace);
1170                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1171                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1172                _mesa_PolygonOffset(polygon->OffsetFactor,
1173                                    polygon->OffsetUnits);
1174                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1175                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1176                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1177                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1178                                 polygon->OffsetPoint);
1179                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1180                                 polygon->OffsetLine);
1181                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1182                                 polygon->OffsetFill);
1183             }
1184             break;
1185          case GL_POLYGON_STIPPLE_BIT:
1186             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1187             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1188             if (ctx->Driver.PolygonStipple)
1189                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1190             break;
1191          case GL_SCISSOR_BIT:
1192             {
1193                const struct gl_scissor_attrib *scissor;
1194                scissor = (const struct gl_scissor_attrib *) attr->data;
1195                _mesa_Scissor(scissor->X, scissor->Y,
1196                              scissor->Width, scissor->Height);
1197                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1198             }
1199             break;
1200          case GL_STENCIL_BUFFER_BIT:
1201             {
1202                const struct gl_stencil_attrib *stencil;
1203                stencil = (const struct gl_stencil_attrib *) attr->data;
1204                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1205                _mesa_ClearStencil(stencil->Clear);
1206                if (ctx->Extensions.EXT_stencil_two_side) {
1207                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1208                                    stencil->TestTwoSide);
1209                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1210                                              ? GL_BACK : GL_FRONT);
1211                }
1212                /* front state */
1213                _mesa_StencilFuncSeparate(GL_FRONT,
1214                                          stencil->Function[0],
1215                                          stencil->Ref[0],
1216                                          stencil->ValueMask[0]);
1217                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1218                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1219                                        stencil->ZFailFunc[0],
1220                                        stencil->ZPassFunc[0]);
1221                /* back state */
1222                _mesa_StencilFuncSeparate(GL_BACK,
1223                                          stencil->Function[1],
1224                                          stencil->Ref[1],
1225                                          stencil->ValueMask[1]);
1226                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1227                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1228                                        stencil->ZFailFunc[1],
1229                                        stencil->ZPassFunc[1]);
1230             }
1231             break;
1232          case GL_TRANSFORM_BIT:
1233             {
1234                GLuint i;
1235                const struct gl_transform_attrib *xform;
1236                xform = (const struct gl_transform_attrib *) attr->data;
1237                _mesa_MatrixMode(xform->MatrixMode);
1238                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1239                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1240
1241                /* restore clip planes */
1242                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1243                   const GLuint mask = 1 << i;
1244                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1245                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1246                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1247                                    !!(xform->ClipPlanesEnabled & mask));
1248                   if (ctx->Driver.ClipPlane)
1249                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1250                }
1251
1252                /* normalize/rescale */
1253                if (xform->Normalize != ctx->Transform.Normalize)
1254                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1255                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1256                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1257                                    ctx->Transform.RescaleNormals);
1258                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1259                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1260                                    ctx->Transform.DepthClamp);
1261             }
1262             break;
1263          case GL_TEXTURE_BIT:
1264             {
1265                struct texture_state *texstate
1266                   = (struct texture_state *) attr->data;
1267                pop_texture_group(ctx, texstate);
1268                ctx->NewState |= _NEW_TEXTURE;
1269             }
1270             break;
1271          case GL_VIEWPORT_BIT:
1272             {
1273                const struct gl_viewport_attrib *vp;
1274                vp = (const struct gl_viewport_attrib *) attr->data;
1275                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1276                _mesa_DepthRange(vp->Near, vp->Far);
1277             }
1278             break;
1279          case GL_MULTISAMPLE_BIT_ARB:
1280             {
1281                const struct gl_multisample_attrib *ms;
1282                ms = (const struct gl_multisample_attrib *) attr->data;
1283
1284                TEST_AND_UPDATE(ctx->Multisample.Enabled,
1285                                ms->Enabled,
1286                                GL_MULTISAMPLE);
1287
1288                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
1289                                ms->SampleCoverage,
1290                                GL_SAMPLE_COVERAGE);
1291
1292                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
1293                                ms->SampleAlphaToCoverage,
1294                                GL_SAMPLE_ALPHA_TO_COVERAGE);
1295
1296                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
1297                                ms->SampleAlphaToOne,
1298                                GL_SAMPLE_ALPHA_TO_ONE);
1299
1300                _mesa_SampleCoverage(ms->SampleCoverageValue,
1301                                        ms->SampleCoverageInvert);
1302             }
1303             break;
1304
1305          default:
1306             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1307             break;
1308       }
1309
1310       next = attr->next;
1311       free(attr->data);
1312       free(attr);
1313       attr = next;
1314    }
1315 }
1316
1317
1318 /**
1319  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1320  * object refcounts.
1321  */
1322 static void
1323 copy_pixelstore(struct gl_context *ctx,
1324                 struct gl_pixelstore_attrib *dst,
1325                 const struct gl_pixelstore_attrib *src)
1326 {
1327    dst->Alignment = src->Alignment;
1328    dst->RowLength = src->RowLength;
1329    dst->SkipPixels = src->SkipPixels;
1330    dst->SkipRows = src->SkipRows;
1331    dst->ImageHeight = src->ImageHeight;
1332    dst->SkipImages = src->SkipImages;
1333    dst->SwapBytes = src->SwapBytes;
1334    dst->LsbFirst = src->LsbFirst;
1335    dst->Invert = src->Invert;
1336    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1337 }
1338
1339
1340 #define GL_CLIENT_PACK_BIT (1<<20)
1341 #define GL_CLIENT_UNPACK_BIT (1<<21)
1342
1343 /**
1344  * Copy gl_array_object from src to dest.
1345  * 'dest' must be in an initialized state.
1346  */
1347 static void
1348 copy_array_object(struct gl_context *ctx,
1349                   struct gl_array_object *dest,
1350                   struct gl_array_object *src)
1351 {
1352    GLuint i;
1353
1354    /* skip Name */
1355    /* skip RefCount */
1356
1357    /* In theory must be the same anyway, but on recreate make sure it matches */
1358    dest->ARBsemantics = src->ARBsemantics;
1359
1360    for (i = 0; i < Elements(src->_VertexAttrib); i++) {
1361       _mesa_copy_client_array(ctx, &dest->_VertexAttrib[i], &src->_VertexAttrib[i]);
1362       _mesa_copy_vertex_attrib_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1363       _mesa_copy_vertex_buffer_binding(ctx, &dest->VertexBinding[i], &src->VertexBinding[i]);
1364    }
1365
1366    /* _Enabled must be the same than on push */
1367    dest->_Enabled = src->_Enabled;
1368    dest->_MaxElement = src->_MaxElement;
1369 }
1370
1371 /**
1372  * Copy gl_array_attrib from src to dest.
1373  * 'dest' must be in an initialized state.
1374  */
1375 static void
1376 copy_array_attrib(struct gl_context *ctx,
1377                   struct gl_array_attrib *dest,
1378                   struct gl_array_attrib *src,
1379                   bool vbo_deleted)
1380 {
1381    /* skip ArrayObj */
1382    /* skip DefaultArrayObj, Objects */
1383    dest->ActiveTexture = src->ActiveTexture;
1384    dest->LockFirst = src->LockFirst;
1385    dest->LockCount = src->LockCount;
1386    dest->PrimitiveRestart = src->PrimitiveRestart;
1387    dest->PrimitiveRestartFixedIndex = src->PrimitiveRestartFixedIndex;
1388    dest->_PrimitiveRestart = src->_PrimitiveRestart;
1389    dest->RestartIndex = src->RestartIndex;
1390    /* skip NewState */
1391    /* skip RebindArrays */
1392
1393    if (!vbo_deleted)
1394       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1395
1396    /* skip ArrayBufferObj */
1397    /* skip ElementArrayBufferObj */
1398 }
1399
1400 /**
1401  * Save the content of src to dest.
1402  */
1403 static void
1404 save_array_attrib(struct gl_context *ctx,
1405                   struct gl_array_attrib *dest,
1406                   struct gl_array_attrib *src)
1407 {
1408    /* Set the Name, needed for restore, but do never overwrite.
1409     * Needs to match value in the object hash. */
1410    dest->ArrayObj->Name = src->ArrayObj->Name;
1411    /* And copy all of the rest. */
1412    copy_array_attrib(ctx, dest, src, false);
1413
1414    /* Just reference them here */
1415    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1416                                  src->ArrayBufferObj);
1417    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1418                                  src->ArrayObj->ElementArrayBufferObj);
1419 }
1420
1421 /**
1422  * Restore the content of src to dest.
1423  */
1424 static void
1425 restore_array_attrib(struct gl_context *ctx,
1426                      struct gl_array_attrib *dest,
1427                      struct gl_array_attrib *src)
1428 {
1429    /* The ARB_vertex_array_object spec says:
1430     *
1431     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1432     *     if array is not a name returned from a previous call to
1433     *     GenVertexArrays, or if such a name has since been deleted with
1434     *     DeleteVertexArrays."
1435     *
1436     * Therefore popping a deleted VAO cannot magically recreate it.
1437     *
1438     * The semantics of objects created using APPLE_vertex_array_objects behave
1439     * differently.  These objects expect to be recreated by pop.  Alas.
1440     */
1441    const bool arb_vao = (src->ArrayObj->Name != 0
1442                          && src->ArrayObj->ARBsemantics);
1443
1444    if (arb_vao && !_mesa_IsVertexArray(src->ArrayObj->Name))
1445       return;
1446
1447    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1448
1449    /* Restore or recreate the buffer objects by the names ... */
1450    if (!arb_vao
1451        || src->ArrayBufferObj->Name == 0
1452        || _mesa_IsBuffer(src->ArrayBufferObj->Name)) {
1453       /* ... and restore its content */
1454       copy_array_attrib(ctx, dest, src, false);
1455
1456       _mesa_BindBuffer(GL_ARRAY_BUFFER_ARB,
1457                           src->ArrayBufferObj->Name);
1458    } else {
1459       copy_array_attrib(ctx, dest, src, true);
1460    }
1461
1462    if (!arb_vao
1463        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1464        || _mesa_IsBuffer(src->ArrayObj->ElementArrayBufferObj->Name))
1465       _mesa_BindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB,
1466                           src->ArrayObj->ElementArrayBufferObj->Name);
1467 }
1468
1469 /**
1470  * init/alloc the fields of 'attrib'.
1471  * Needs to the init part matching free_array_attrib_data below.
1472  */
1473 static void
1474 init_array_attrib_data(struct gl_context *ctx,
1475                        struct gl_array_attrib *attrib)
1476 {
1477    /* Get a non driver gl_array_object. */
1478    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1479    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1480 }
1481
1482 /**
1483  * Free/unreference the fields of 'attrib' but don't delete it (that's
1484  * done later in the calling code).
1485  * Needs to the cleanup part matching init_array_attrib_data above.
1486  */
1487 static void
1488 free_array_attrib_data(struct gl_context *ctx,
1489                        struct gl_array_attrib *attrib)
1490 {
1491    /* We use a non driver array object, so don't just unref since we would
1492     * end up using the drivers DeleteArrayObject function for deletion. */
1493    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1494    attrib->ArrayObj = 0;
1495    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1496 }
1497
1498
1499 void GLAPIENTRY
1500 _mesa_PushClientAttrib(GLbitfield mask)
1501 {
1502    struct gl_attrib_node *head;
1503
1504    GET_CURRENT_CONTEXT(ctx);
1505
1506    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1507       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1508       return;
1509    }
1510
1511    /* Build linked list of attribute nodes which save all attribute
1512     * groups specified by the mask.
1513     */
1514    head = NULL;
1515
1516    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1517       struct gl_pixelstore_attrib *attr;
1518       /* packing attribs */
1519       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1520       copy_pixelstore(ctx, attr, &ctx->Pack);
1521       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1522       /* unpacking attribs */
1523       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1524       copy_pixelstore(ctx, attr, &ctx->Unpack);
1525       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1526    }
1527
1528    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1529       struct gl_array_attrib *attr;
1530       attr = CALLOC_STRUCT( gl_array_attrib );
1531       init_array_attrib_data(ctx, attr);
1532       save_array_attrib(ctx, attr, &ctx->Array);
1533       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1534    }
1535
1536    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1537    ctx->ClientAttribStackDepth++;
1538 }
1539
1540
1541
1542
1543 void GLAPIENTRY
1544 _mesa_PopClientAttrib(void)
1545 {
1546    struct gl_attrib_node *node, *next;
1547
1548    GET_CURRENT_CONTEXT(ctx);
1549    FLUSH_VERTICES(ctx, 0);
1550
1551    if (ctx->ClientAttribStackDepth == 0) {
1552       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1553       return;
1554    }
1555
1556    ctx->ClientAttribStackDepth--;
1557    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1558
1559    while (node) {
1560       switch (node->kind) {
1561          case GL_CLIENT_PACK_BIT:
1562             {
1563                struct gl_pixelstore_attrib *store =
1564                   (struct gl_pixelstore_attrib *) node->data;
1565                copy_pixelstore(ctx, &ctx->Pack, store);
1566                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1567             }
1568             break;
1569          case GL_CLIENT_UNPACK_BIT:
1570             {
1571                struct gl_pixelstore_attrib *store =
1572                   (struct gl_pixelstore_attrib *) node->data;
1573                copy_pixelstore(ctx, &ctx->Unpack, store);
1574                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1575             }
1576             break;
1577          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1578             struct gl_array_attrib * attr =
1579               (struct gl_array_attrib *) node->data;
1580             restore_array_attrib(ctx, &ctx->Array, attr);
1581             free_array_attrib_data(ctx, attr);
1582             ctx->NewState |= _NEW_ARRAY;
1583             break;
1584          }
1585          default:
1586             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1587             break;
1588       }
1589
1590       next = node->next;
1591       free(node->data);
1592       free(node);
1593       node = next;
1594    }
1595 }
1596
1597
1598 /**
1599  * Free any attribute state data that might be attached to the context.
1600  */
1601 void
1602 _mesa_free_attrib_data(struct gl_context *ctx)
1603 {
1604    while (ctx->AttribStackDepth > 0) {
1605       struct gl_attrib_node *attr, *next;
1606
1607       ctx->AttribStackDepth--;
1608       attr = ctx->AttribStack[ctx->AttribStackDepth];
1609
1610       while (attr) {
1611          if (attr->kind == GL_TEXTURE_BIT) {
1612             struct texture_state *texstate = (struct texture_state*)attr->data;
1613             GLuint u, tgt;
1614             /* clear references to the saved texture objects */
1615             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1616                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1617                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1618                }
1619             }
1620             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1621          }
1622          else {
1623             /* any other chunks of state that requires special handling? */
1624          }
1625
1626          next = attr->next;
1627          free(attr->data);
1628          free(attr);
1629          attr = next;
1630       }
1631    }
1632 }
1633
1634
1635 void _mesa_init_attrib( struct gl_context *ctx )
1636 {
1637    /* Renderer and client attribute stacks */
1638    ctx->AttribStackDepth = 0;
1639    ctx->ClientAttribStackDepth = 0;
1640 }