src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   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 "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 "mfeatures.h"
  47 #include "multisample.h"
  48 #include "points.h"
  49 #include "polygon.h"
  50 #include "shared.h"
  51 #include "scissor.h"
  52 #include "stencil.h"
  53 #include "texenv.h"
  54 #include "texgen.h"
  55 #include "texobj.h"
  56 #include "texparam.h"
  57 #include "texstate.h"
  58 #include "varray.h"
  59 #include "viewport.h"
  60 #include "mtypes.h"
  61 #include "main/dispatch.h"
  62 #include "hash.h"
  63 #include <stdbool.h>
  64
  65
  66 /**
  67  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  68  */
  69 struct gl_enable_attrib
  70 {
  71    GLboolean AlphaTest;
  72    GLboolean AutoNormal;
  73    GLboolean Blend;
  74    GLbitfield ClipPlanes;
  75    GLboolean ColorMaterial;
  76    GLboolean CullFace;
  77    GLboolean DepthClamp;
  78    GLboolean DepthTest;
  79    GLboolean Dither;
  80    GLboolean Fog;
  81    GLboolean Light[MAX_LIGHTS];
  82    GLboolean Lighting;
  83    GLboolean LineSmooth;
  84    GLboolean LineStipple;
  85    GLboolean IndexLogicOp;
  86    GLboolean ColorLogicOp;
  87
  88    GLboolean Map1Color4;
  89    GLboolean Map1Index;
  90    GLboolean Map1Normal;
  91    GLboolean Map1TextureCoord1;
  92    GLboolean Map1TextureCoord2;
  93    GLboolean Map1TextureCoord3;
  94    GLboolean Map1TextureCoord4;
  95    GLboolean Map1Vertex3;
  96    GLboolean Map1Vertex4;
  97    GLboolean 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
 107    GLboolean Normalize;
 108    GLboolean PixelTexture;
 109    GLboolean PointSmooth;
 110    GLboolean PolygonOffsetPoint;
 111    GLboolean PolygonOffsetLine;
 112    GLboolean PolygonOffsetFill;
 113    GLboolean PolygonSmooth;
 114    GLboolean PolygonStipple;
 115    GLboolean RescaleNormals;
 116    GLboolean Scissor;
 117    GLboolean Stencil;
 118    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 119    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 120    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 121    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 122    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 123    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 124
 125    GLbitfield Texture[MAX_TEXTURE_UNITS];
 126    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 127
 128    /* GL_ARB_vertex_program */
 129    GLboolean VertexProgram;
 130    GLboolean VertexProgramPointSize;
 131    GLboolean VertexProgramTwoSide;
 132
 133    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 134    GLboolean PointSprite;
 135    GLboolean FragmentShaderATI;
 136
 137    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 138    GLboolean sRGBEnabled;
 139 };
 140
 141
 142 /**
 143  * Node for the attribute stack.
 144  */
 145 struct gl_attrib_node
 146 {
 147    GLbitfield kind;
 148    void *data;
 149    struct gl_attrib_node *next;
 150 };
 151
 152
 153
 154 /**
 155  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 156  */
 157 struct texture_state
 158 {
 159    struct gl_texture_attrib Texture;  /**< The usual context state */
 160
 161    /** to save per texture object state (wrap modes, filters, etc): */
 162    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 163
 164    /**
 165     * To save references to texture objects (so they don't get accidentally
 166     * deleted while saved in the attribute stack).
 167     */
 168    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 169
 170    /* We need to keep a reference to the shared state.  That's where the
 171     * default texture objects are kept.  We don't want that state to be
 172     * freed while the attribute stack contains pointers to any default
 173     * texture objects.
 174     */
 175    struct gl_shared_state *SharedRef;
 176 };
 177
 178
 179 /**
 180  * Allocate new attribute node of given type/kind.  Attach payload data.
 181  * Insert it into the linked list named by 'head'.
 182  */
 183 static void
 184 save_attrib_data(struct gl_attrib_node **head,
 185                  GLbitfield kind, void *payload)
 186 {
 187    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 188    if (n) {
 189       n->kind = kind;
 190       n->data = payload;
 191       /* insert at head */
 192       n->next = *head;
 193       *head = n;
 194    }
 195    else {
 196       /* out of memory! */
 197    }
 198 }
 199
 200
 201 void GLAPIENTRY
 202 _mesa_PushAttrib(GLbitfield mask)
 203 {
 204    struct gl_attrib_node *head;
 205
 206    GET_CURRENT_CONTEXT(ctx);
 207
 208    if (MESA_VERBOSE & VERBOSE_API)
 209       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 210
 211    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 212       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 213       return;
 214    }
 215
 216    /* Build linked list of attribute nodes which save all attribute */
 217    /* groups specified by the mask. */
 218    head = NULL;
 219
 220    if (mask & GL_ACCUM_BUFFER_BIT) {
 221       struct gl_accum_attrib *attr;
 222       attr = MALLOC_STRUCT( gl_accum_attrib );
 223       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 224       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 225    }
 226
 227    if (mask & GL_COLOR_BUFFER_BIT) {
 228       GLuint i;
 229       struct gl_colorbuffer_attrib *attr;
 230       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 231       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 232       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 233       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 234          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 235       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 236    }
 237
 238    if (mask & GL_CURRENT_BIT) {
 239       struct gl_current_attrib *attr;
 240       FLUSH_CURRENT( ctx, 0 );
 241       attr = MALLOC_STRUCT( gl_current_attrib );
 242       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 243       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 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       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 251    }
 252
 253    if (mask & GL_ENABLE_BIT) {
 254       struct gl_enable_attrib *attr;
 255       GLuint i;
 256       attr = MALLOC_STRUCT( gl_enable_attrib );
 257       /* Copy enable flags from all other attributes into the enable struct. */
 258       attr->AlphaTest = ctx->Color.AlphaEnabled;
 259       attr->AutoNormal = ctx->Eval.AutoNormal;
 260       attr->Blend = ctx->Color.BlendEnabled;
 261       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 262       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 263       attr->CullFace = ctx->Polygon.CullFlag;
 264       attr->DepthClamp = ctx->Transform.DepthClamp;
 265       attr->DepthTest = ctx->Depth.Test;
 266       attr->Dither = ctx->Color.DitherFlag;
 267       attr->Fog = ctx->Fog.Enabled;
 268       for (i = 0; i < ctx->Const.MaxLights; i++) {
 269          attr->Light[i] = ctx->Light.Light[i].Enabled;
 270       }
 271       attr->Lighting = ctx->Light.Enabled;
 272       attr->LineSmooth = ctx->Line.SmoothFlag;
 273       attr->LineStipple = ctx->Line.StippleFlag;
 274       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 275       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 276       attr->Map1Color4 = ctx->Eval.Map1Color4;
 277       attr->Map1Index = ctx->Eval.Map1Index;
 278       attr->Map1Normal = ctx->Eval.Map1Normal;
 279       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 280       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 281       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 282       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 283       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 284       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 285       attr->Map2Color4 = ctx->Eval.Map2Color4;
 286       attr->Map2Index = ctx->Eval.Map2Index;
 287       attr->Map2Normal = ctx->Eval.Map2Normal;
 288       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 289       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 290       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 291       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 292       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 293       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 294       attr->Normalize = ctx->Transform.Normalize;
 295       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 296       attr->PointSmooth = ctx->Point.SmoothFlag;
 297       attr->PointSprite = ctx->Point.PointSprite;
 298       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 299       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 300       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 301       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 302       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 303       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 304       attr->Scissor = ctx->Scissor.Enabled;
 305       attr->Stencil = ctx->Stencil.Enabled;
 306       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 307       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 308       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 309       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 310       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 311       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 312          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 313          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 314       }
 315       /* GL_ARB_vertex_program */
 316       attr->VertexProgram = ctx->VertexProgram.Enabled;
 317       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 318       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 319       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 320
 321       /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 322       attr->sRGBEnabled = ctx->Color.sRGBEnabled;
 323    }
 324
 325    if (mask & GL_EVAL_BIT) {
 326       struct gl_eval_attrib *attr;
 327       attr = MALLOC_STRUCT( gl_eval_attrib );
 328       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 329       save_attrib_data(&head, GL_EVAL_BIT, attr);
 330    }
 331
 332    if (mask & GL_FOG_BIT) {
 333       struct gl_fog_attrib *attr;
 334       attr = MALLOC_STRUCT( gl_fog_attrib );
 335       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 336       save_attrib_data(&head, GL_FOG_BIT, attr);
 337    }
 338
 339    if (mask & GL_HINT_BIT) {
 340       struct gl_hint_attrib *attr;
 341       attr = MALLOC_STRUCT( gl_hint_attrib );
 342       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 343       save_attrib_data(&head, GL_HINT_BIT, attr);
 344    }
 345
 346    if (mask & GL_LIGHTING_BIT) {
 347       struct gl_light_attrib *attr;
 348       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 349       attr = MALLOC_STRUCT( gl_light_attrib );
 350       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 351       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 352    }
 353
 354    if (mask & GL_LINE_BIT) {
 355       struct gl_line_attrib *attr;
 356       attr = MALLOC_STRUCT( gl_line_attrib );
 357       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 358       save_attrib_data(&head, GL_LINE_BIT, attr);
 359    }
 360
 361    if (mask & GL_LIST_BIT) {
 362       struct gl_list_attrib *attr;
 363       attr = MALLOC_STRUCT( gl_list_attrib );
 364       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 365       save_attrib_data(&head, GL_LIST_BIT, attr);
 366    }
 367
 368    if (mask & GL_PIXEL_MODE_BIT) {
 369       struct gl_pixel_attrib *attr;
 370       attr = MALLOC_STRUCT( gl_pixel_attrib );
 371       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 372       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 373       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 374       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 375    }
 376
 377    if (mask & GL_POINT_BIT) {
 378       struct gl_point_attrib *attr;
 379       attr = MALLOC_STRUCT( gl_point_attrib );
 380       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 381       save_attrib_data(&head, GL_POINT_BIT, attr);
 382    }
 383
 384    if (mask & GL_POLYGON_BIT) {
 385       struct gl_polygon_attrib *attr;
 386       attr = MALLOC_STRUCT( gl_polygon_attrib );
 387       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 388       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 389    }
 390
 391    if (mask & GL_POLYGON_STIPPLE_BIT) {
 392       GLuint *stipple;
 393       stipple = malloc( 32*sizeof(GLuint) );
 394       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 395       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 396    }
 397
 398    if (mask & GL_SCISSOR_BIT) {
 399       struct gl_scissor_attrib *attr;
 400       attr = MALLOC_STRUCT( gl_scissor_attrib );
 401       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 402       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 403    }
 404
 405    if (mask & GL_STENCIL_BUFFER_BIT) {
 406       struct gl_stencil_attrib *attr;
 407       attr = MALLOC_STRUCT( gl_stencil_attrib );
 408       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 409       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 410    }
 411
 412    if (mask & GL_TEXTURE_BIT) {
 413       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 414       GLuint u, tex;
 415
 416       if (!texstate) {
 417          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 418          goto end;
 419       }
 420
 421       _mesa_lock_context_textures(ctx);
 422
 423       /* copy/save the bulk of texture state here */
 424       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 425
 426       /* Save references to the currently bound texture objects so they don't
 427        * accidentally get deleted while referenced in the attribute stack.
 428        */
 429       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 430          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 431             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 432                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 433          }
 434       }
 435
 436       /* copy state/contents of the currently bound texture objects */
 437       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 438          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 439             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 440                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 441          }
 442       }
 443
 444       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 445
 446       _mesa_unlock_context_textures(ctx);
 447
 448       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 449    }
 450
 451    if (mask & GL_TRANSFORM_BIT) {
 452       struct gl_transform_attrib *attr;
 453       attr = MALLOC_STRUCT( gl_transform_attrib );
 454       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 455       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 456    }
 457
 458    if (mask & GL_VIEWPORT_BIT) {
 459       struct gl_viewport_attrib *attr;
 460       attr = MALLOC_STRUCT( gl_viewport_attrib );
 461       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 462       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 463    }
 464
 465    /* GL_ARB_multisample */
 466    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 467       struct gl_multisample_attrib *attr;
 468       attr = MALLOC_STRUCT( gl_multisample_attrib );
 469       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 470       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 471    }
 472
 473 end:
 474    ctx->AttribStack[ctx->AttribStackDepth] = head;
 475    ctx->AttribStackDepth++;
 476 }
 477
 478
 479
 480 static void
 481 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 482 {
 483    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 484    GLuint i;
 485
 486 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 487         if ((VALUE) != (NEWVALUE)) {                    \
 488            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 489         }
 490
 491    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 492    if (ctx->Color.BlendEnabled != enable->Blend) {
 493       if (ctx->Extensions.EXT_draw_buffers2) {
 494          GLuint i;
 495          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 496             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 497          }
 498       }
 499       else {
 500          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 501       }
 502    }
 503
 504    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 505       const GLuint mask = 1 << i;
 506       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 507           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 508                            !!(enable->ClipPlanes & mask));
 509    }
 510
 511    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 512                    GL_COLOR_MATERIAL);
 513    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 514    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 515                    GL_DEPTH_CLAMP);
 516    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 517    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 518    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 519    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 520    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 521    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 522                    GL_LINE_STIPPLE);
 523    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 524                    GL_INDEX_LOGIC_OP);
 525    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 526                    GL_COLOR_LOGIC_OP);
 527
 528    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 529    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 530    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 531    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 532                    GL_MAP1_TEXTURE_COORD_1);
 533    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 534                    GL_MAP1_TEXTURE_COORD_2);
 535    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 536                    GL_MAP1_TEXTURE_COORD_3);
 537    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 538                    GL_MAP1_TEXTURE_COORD_4);
 539    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 540                    GL_MAP1_VERTEX_3);
 541    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 542                    GL_MAP1_VERTEX_4);
 543
 544    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 545    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 546    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 547    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 548                    GL_MAP2_TEXTURE_COORD_1);
 549    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 550                    GL_MAP2_TEXTURE_COORD_2);
 551    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 552                    GL_MAP2_TEXTURE_COORD_3);
 553    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 554                    GL_MAP2_TEXTURE_COORD_4);
 555    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 556                    GL_MAP2_VERTEX_3);
 557    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 558                    GL_MAP2_VERTEX_4);
 559
 560    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 561    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 562    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 563                    GL_RESCALE_NORMAL_EXT);
 564    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 565                    enable->RasterPositionUnclipped,
 566                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 567    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 568                    GL_POINT_SMOOTH);
 569    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 570       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 571                       GL_POINT_SPRITE_NV);
 572    }
 573    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 574                    GL_POLYGON_OFFSET_POINT);
 575    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 576                    GL_POLYGON_OFFSET_LINE);
 577    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 578                    GL_POLYGON_OFFSET_FILL);
 579    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 580                    GL_POLYGON_SMOOTH);
 581    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 582                    GL_POLYGON_STIPPLE);
 583    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 584    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 585    if (ctx->Extensions.EXT_stencil_two_side) {
 586       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 587    }
 588    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 589                    GL_MULTISAMPLE_ARB);
 590    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 591                    enable->SampleAlphaToCoverage,
 592                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 593    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 594                    enable->SampleAlphaToOne,
 595                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 596    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 597                    enable->SampleCoverage,
 598                    GL_SAMPLE_COVERAGE_ARB);
 599    /* GL_ARB_vertex_program */
 600    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 601                    enable->VertexProgram,
 602                    GL_VERTEX_PROGRAM_ARB);
 603    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 604                    enable->VertexProgramPointSize,
 605                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 606    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 607                    enable->VertexProgramTwoSide,
 608                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 609
 610    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 611    TEST_AND_UPDATE(ctx->Color.sRGBEnabled, enable->sRGBEnabled,
 612                    GL_FRAMEBUFFER_SRGB);
 613
 614    /* texture unit enables */
 615    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 616       const GLbitfield enabled = enable->Texture[i];
 617       const GLbitfield genEnabled = enable->TexGen[i];
 618
 619       if (ctx->Texture.Unit[i].Enabled != enabled) {
 620          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 621
 622          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 623          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 624          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 625          if (ctx->Extensions.NV_texture_rectangle) {
 626             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 627                              !!(enabled & TEXTURE_RECT_BIT));
 628          }
 629          if (ctx->Extensions.ARB_texture_cube_map) {
 630             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 631                              !!(enabled & TEXTURE_CUBE_BIT));
 632          }
 633          if (ctx->Extensions.MESA_texture_array) {
 634             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 635                              !!(enabled & TEXTURE_1D_ARRAY_BIT));
 636             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 637                              !!(enabled & TEXTURE_2D_ARRAY_BIT));
 638          }
 639       }
 640
 641       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 642          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 643          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 644          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 645          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 646          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 647       }
 648    }
 649
 650    _mesa_ActiveTexture(GL_TEXTURE0 + curTexUnitSave);
 651 }
 652
 653
 654 /**
 655  * Pop/restore texture attribute/group state.
 656  */
 657 static void
 658 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 659 {
 660    GLuint u;
 661
 662    _mesa_lock_context_textures(ctx);
 663
 664    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 665       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 666       GLuint tgt;
 667
 668       _mesa_ActiveTexture(GL_TEXTURE0_ARB + u);
 669       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 670       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 671       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 672       if (ctx->Extensions.ARB_texture_cube_map) {
 673          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 674                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 675       }
 676       if (ctx->Extensions.NV_texture_rectangle) {
 677          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 678                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 679       }
 680       if (ctx->Extensions.MESA_texture_array) {
 681          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 682                           !!(unit->Enabled & TEXTURE_1D_ARRAY_BIT));
 683          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 684                           !!(unit->Enabled & TEXTURE_2D_ARRAY_BIT));
 685       }
 686       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 687       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 688       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 689       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 690       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 691       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 692       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 693       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 694       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 695       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 696       /* Eye plane done differently to avoid re-transformation */
 697       {
 698          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 699          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 700          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 701          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 702          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 703          if (ctx->Driver.TexGen) {
 704             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 705             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 706             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 707             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 708          }
 709       }
 710       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 711       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 712       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 713       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 714       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 715                     unit->LodBias);
 716       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 717                     unit->Combine.ModeRGB);
 718       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 719                     unit->Combine.ModeA);
 720       {
 721          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 722          GLuint i;
 723          for (i = 0; i < n; i++) {
 724             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 725                           unit->Combine.SourceRGB[i]);
 726             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 727                           unit->Combine.SourceA[i]);
 728             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 729                           unit->Combine.OperandRGB[i]);
 730             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 731                           unit->Combine.OperandA[i]);
 732          }
 733       }
 734       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 735                     1 << unit->Combine.ScaleShiftRGB);
 736       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 737                     1 << unit->Combine.ScaleShiftA);
 738
 739       /* Restore texture object state for each target */
 740       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 741          const struct gl_texture_object *obj = NULL;
 742          const struct gl_sampler_object *samp;
 743          GLenum target;
 744
 745          obj = &texstate->SavedObj[u][tgt];
 746
 747          /* don't restore state for unsupported targets to prevent
 748           * raising GL errors.
 749           */
 750          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 751              !ctx->Extensions.ARB_texture_cube_map) {
 752             continue;
 753          }
 754          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 755                   !ctx->Extensions.NV_texture_rectangle) {
 756             continue;
 757          }
 758          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 759                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 760                   !ctx->Extensions.MESA_texture_array) {
 761             continue;
 762          }
 763          else if (obj->Target == GL_TEXTURE_CUBE_MAP_ARRAY &&
 764              !ctx->Extensions.ARB_texture_cube_map_array) {
 765             continue;
 766          } else if (obj->Target == GL_TEXTURE_BUFFER)
 767             continue;
 768          else if (obj->Target == GL_TEXTURE_EXTERNAL_OES)
 769             continue;
 770
 771          target = obj->Target;
 772
 773          _mesa_BindTexture(target, obj->Name);
 774
 775          samp = &obj->Sampler;
 776
 777          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 778          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 779          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 780          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 781          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 782          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 783          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 784          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 785          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 786          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 787          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 788          if (target != GL_TEXTURE_RECTANGLE_ARB)
 789             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 790          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 791             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 792                                 samp->MaxAnisotropy);
 793          }
 794          if (ctx->Extensions.ARB_shadow) {
 795             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE,
 796                                 samp->CompareMode);
 797             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_FUNC,
 798                                 samp->CompareFunc);
 799          }
 800          if (ctx->Extensions.ARB_depth_texture)
 801             _mesa_TexParameteri(target, GL_DEPTH_TEXTURE_MODE, obj->DepthMode);
 802       }
 803
 804       /* remove saved references to the texture objects */
 805       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 806          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 807       }
 808    }
 809
 810    _mesa_ActiveTexture(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 811
 812    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 813
 814    _mesa_unlock_context_textures(ctx);
 815 }
 816
 817
 818 /*
 819  * This function is kind of long just because we have to call a lot
 820  * of device driver functions to update device driver state.
 821  *
 822  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 823  * in order to restore GL state.  This isn't terribly efficient but it
 824  * ensures that dirty flags and any derived state gets updated correctly.
 825  * We could at least check if the value to restore equals the current value
 826  * and then skip the Mesa call.
 827  */
 828 void GLAPIENTRY
 829 _mesa_PopAttrib(void)
 830 {
 831    struct gl_attrib_node *attr, *next;
 832    GET_CURRENT_CONTEXT(ctx);
 833    FLUSH_VERTICES(ctx, 0);
 834
 835    if (ctx->AttribStackDepth == 0) {
 836       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 837       return;
 838    }
 839
 840    ctx->AttribStackDepth--;
 841    attr = ctx->AttribStack[ctx->AttribStackDepth];
 842
 843    while (attr) {
 844
 845       if (MESA_VERBOSE & VERBOSE_API) {
 846          _mesa_debug(ctx, "glPopAttrib %s\n",
 847                      _mesa_lookup_enum_by_nr(attr->kind));
 848       }
 849
 850       switch (attr->kind) {
 851          case GL_ACCUM_BUFFER_BIT:
 852             {
 853                const struct gl_accum_attrib *accum;
 854                accum = (const struct gl_accum_attrib *) attr->data;
 855                _mesa_ClearAccum(accum->ClearColor[0],
 856                                 accum->ClearColor[1],
 857                                 accum->ClearColor[2],
 858                                 accum->ClearColor[3]);
 859             }
 860             break;
 861          case GL_COLOR_BUFFER_BIT:
 862             {
 863                const struct gl_colorbuffer_attrib *color;
 864
 865                color = (const struct gl_colorbuffer_attrib *) attr->data;
 866                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 867                _mesa_ClearColor(color->ClearColor.f[0],
 868                                 color->ClearColor.f[1],
 869                                 color->ClearColor.f[2],
 870                                 color->ClearColor.f[3]);
 871                _mesa_IndexMask(color->IndexMask);
 872                if (!ctx->Extensions.EXT_draw_buffers2) {
 873                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 874                                   (GLboolean) (color->ColorMask[0][1] != 0),
 875                                   (GLboolean) (color->ColorMask[0][2] != 0),
 876                                   (GLboolean) (color->ColorMask[0][3] != 0));
 877                }
 878                else {
 879                   GLuint i;
 880                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 881                      _mesa_ColorMaski(i,
 882                                   (GLboolean) (color->ColorMask[i][0] != 0),
 883                                   (GLboolean) (color->ColorMask[i][1] != 0),
 884                                   (GLboolean) (color->ColorMask[i][2] != 0),
 885                                   (GLboolean) (color->ColorMask[i][3] != 0));
 886                   }
 887                }
 888                {
 889                   /* Need to determine if more than one color output is
 890                    * specified.  If so, call glDrawBuffersARB, else call
 891                    * glDrawBuffer().  This is a subtle, but essential point
 892                    * since GL_FRONT (for example) is illegal for the former
 893                    * function, but legal for the later.
 894                    */
 895                   GLboolean multipleBuffers = GL_FALSE;
 896                   GLuint i;
 897
 898                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 899                      if (color->DrawBuffer[i] != GL_NONE) {
 900                         multipleBuffers = GL_TRUE;
 901                         break;
 902                      }
 903                   }
 904                   /* Call the API_level functions, not _mesa_drawbuffers()
 905                    * since we need to do error checking on the pop'd
 906                    * GL_DRAW_BUFFER.
 907                    * Ex: if GL_FRONT were pushed, but we're popping with a
 908                    * user FBO bound, GL_FRONT will be illegal and we'll need
 909                    * to record that error.  Per OpenGL ARB decision.
 910                    */
 911                   if (multipleBuffers)
 912                      _mesa_DrawBuffers(ctx->Const.MaxDrawBuffers,
 913                                           color->DrawBuffer);
 914                   else
 915                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 916                }
 917                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 918                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 919                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 920                   if (ctx->Extensions.EXT_draw_buffers2) {
 921                      GLuint i;
 922                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 923                         _mesa_set_enablei(ctx, GL_BLEND, i,
 924                                           (color->BlendEnabled >> i) & 1);
 925                      }
 926                   }
 927                   else {
 928                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 929                   }
 930                }
 931                if (ctx->Color._BlendFuncPerBuffer ||
 932                    ctx->Color._BlendEquationPerBuffer) {
 933                   /* set blend per buffer */
 934                   GLuint buf;
 935                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
 936                      _mesa_BlendFuncSeparateiARB(buf, color->Blend[buf].SrcRGB,
 937                                               color->Blend[buf].DstRGB,
 938                                               color->Blend[buf].SrcA,
 939                                               color->Blend[buf].DstA);
 940                      _mesa_BlendEquationSeparateiARB(buf,
 941                                                   color->Blend[buf].EquationRGB,
 942                                                   color->Blend[buf].EquationA);
 943                   }
 944                }
 945                else {
 946                   /* set same blend modes for all buffers */
 947                   _mesa_BlendFuncSeparate(color->Blend[0].SrcRGB,
 948                                              color->Blend[0].DstRGB,
 949                                              color->Blend[0].SrcA,
 950                                              color->Blend[0].DstA);
 951                   /* This special case is because glBlendEquationSeparateEXT
 952                    * cannot take GL_LOGIC_OP as a parameter.
 953                    */
 954                   if (color->Blend[0].EquationRGB ==
 955                       color->Blend[0].EquationA) {
 956                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
 957                   }
 958                   else {
 959                      _mesa_BlendEquationSeparate(
 960                                                  color->Blend[0].EquationRGB,
 961                                                  color->Blend[0].EquationA);
 962                   }
 963                }
 964                _mesa_BlendColor(color->BlendColorUnclamped[0],
 965                                 color->BlendColorUnclamped[1],
 966                                 color->BlendColorUnclamped[2],
 967                                 color->BlendColorUnclamped[3]);
 968                _mesa_LogicOp(color->LogicOp);
 969                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 970                                 color->ColorLogicOpEnabled);
 971                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 972                                 color->IndexLogicOpEnabled);
 973                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 974                _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR_ARB, color->ClampFragmentColor);
 975                _mesa_ClampColor(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 976
 977                /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 978                if (ctx->Extensions.EXT_framebuffer_sRGB)
 979                   _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB, color->sRGBEnabled);
 980             }
 981             break;
 982          case GL_CURRENT_BIT:
 983             FLUSH_CURRENT( ctx, 0 );
 984             memcpy( &ctx->Current, attr->data,
 985                     sizeof(struct gl_current_attrib) );
 986             break;
 987          case GL_DEPTH_BUFFER_BIT:
 988             {
 989                const struct gl_depthbuffer_attrib *depth;
 990                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 991                _mesa_DepthFunc(depth->Func);
 992                _mesa_ClearDepth(depth->Clear);
 993                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 994                _mesa_DepthMask(depth->Mask);
 995             }
 996             break;
 997          case GL_ENABLE_BIT:
 998             {
 999                const struct gl_enable_attrib *enable;
1000                enable = (const struct gl_enable_attrib *) attr->data;
1001                pop_enable_group(ctx, enable);
1002                ctx->NewState |= _NEW_ALL;
1003             }
1004             break;
1005          case GL_EVAL_BIT:
1006             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
1007             ctx->NewState |= _NEW_EVAL;
1008             break;
1009          case GL_FOG_BIT:
1010             {
1011                const struct gl_fog_attrib *fog;
1012                fog = (const struct gl_fog_attrib *) attr->data;
1013                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1014                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1015                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1016                _mesa_Fogf(GL_FOG_START, fog->Start);
1017                _mesa_Fogf(GL_FOG_END, fog->End);
1018                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1019                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1020             }
1021             break;
1022          case GL_HINT_BIT:
1023             {
1024                const struct gl_hint_attrib *hint;
1025                hint = (const struct gl_hint_attrib *) attr->data;
1026                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1027                           hint->PerspectiveCorrection );
1028                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1029                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1030                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1031                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1032                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1033                           hint->ClipVolumeClipping);
1034                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1035                           hint->TextureCompression);
1036             }
1037             break;
1038          case GL_LIGHTING_BIT:
1039             {
1040                GLuint i;
1041                const struct gl_light_attrib *light;
1042                light = (const struct gl_light_attrib *) attr->data;
1043                /* lighting enable */
1044                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1045                /* per-light state */
1046                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1047                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1048
1049                for (i = 0; i < ctx->Const.MaxLights; i++) {
1050                   const struct gl_light *l = &light->Light[i];
1051                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1052                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1053                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1054                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1055                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1056                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1057                   {
1058                      GLfloat p[4] = { 0 };
1059                      p[0] = l->SpotExponent;
1060                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1061                   }
1062                   {
1063                      GLfloat p[4] = { 0 };
1064                      p[0] = l->SpotCutoff;
1065                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1066                   }
1067                   {
1068                      GLfloat p[4] = { 0 };
1069                      p[0] = l->ConstantAttenuation;
1070                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1071                   }
1072                   {
1073                      GLfloat p[4] = { 0 };
1074                      p[0] = l->LinearAttenuation;
1075                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1076                   }
1077                   {
1078                      GLfloat p[4] = { 0 };
1079                      p[0] = l->QuadraticAttenuation;
1080                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1081                   }
1082                }
1083                /* light model */
1084                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1085                                   light->Model.Ambient);
1086                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1087                                  (GLfloat) light->Model.LocalViewer);
1088                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1089                                  (GLfloat) light->Model.TwoSide);
1090                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1091                                  (GLfloat) light->Model.ColorControl);
1092                /* shade model */
1093                _mesa_ShadeModel(light->ShadeModel);
1094                /* color material */
1095                _mesa_ColorMaterial(light->ColorMaterialFace,
1096                                    light->ColorMaterialMode);
1097                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1098                                 light->ColorMaterialEnabled);
1099                /* materials */
1100                memcpy(&ctx->Light.Material, &light->Material,
1101                       sizeof(struct gl_material));
1102                _mesa_ClampColor(GL_CLAMP_VERTEX_COLOR_ARB, light->ClampVertexColor);
1103             }
1104             break;
1105          case GL_LINE_BIT:
1106             {
1107                const struct gl_line_attrib *line;
1108                line = (const struct gl_line_attrib *) attr->data;
1109                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1110                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1111                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1112                _mesa_LineWidth(line->Width);
1113             }
1114             break;
1115          case GL_LIST_BIT:
1116             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1117             break;
1118          case GL_PIXEL_MODE_BIT:
1119             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1120             /* XXX what other pixel state needs to be set by function calls? */
1121             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1122             ctx->NewState |= _NEW_PIXEL;
1123             break;
1124          case GL_POINT_BIT:
1125             {
1126                const struct gl_point_attrib *point;
1127                point = (const struct gl_point_attrib *) attr->data;
1128                _mesa_PointSize(point->Size);
1129                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1130                if (ctx->Extensions.EXT_point_parameters) {
1131                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1132                                          point->Params);
1133                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1134                                         point->MinSize);
1135                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1136                                         point->MaxSize);
1137                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1138                                         point->Threshold);
1139                }
1140                if (ctx->Extensions.NV_point_sprite
1141                    || ctx->Extensions.ARB_point_sprite) {
1142                   GLuint u;
1143                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1144                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1145                                    (GLint) point->CoordReplace[u]);
1146                   }
1147                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1148                   if (ctx->Extensions.NV_point_sprite)
1149                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1150                                            ctx->Point.SpriteRMode);
1151
1152                   if ((ctx->API == API_OPENGL_COMPAT && ctx->Version >= 20)
1153                       || ctx->API == API_OPENGL_CORE)
1154                      _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1155                                            (GLfloat)ctx->Point.SpriteOrigin);
1156                }
1157             }
1158             break;
1159          case GL_POLYGON_BIT:
1160             {
1161                const struct gl_polygon_attrib *polygon;
1162                polygon = (const struct gl_polygon_attrib *) attr->data;
1163                _mesa_CullFace(polygon->CullFaceMode);
1164                _mesa_FrontFace(polygon->FrontFace);
1165                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1166                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1167                _mesa_PolygonOffset(polygon->OffsetFactor,
1168                                    polygon->OffsetUnits);
1169                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1170                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1171                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1172                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1173                                 polygon->OffsetPoint);
1174                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1175                                 polygon->OffsetLine);
1176                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1177                                 polygon->OffsetFill);
1178             }
1179             break;
1180          case GL_POLYGON_STIPPLE_BIT:
1181             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1182             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1183             if (ctx->Driver.PolygonStipple)
1184                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1185             break;
1186          case GL_SCISSOR_BIT:
1187             {
1188                const struct gl_scissor_attrib *scissor;
1189                scissor = (const struct gl_scissor_attrib *) attr->data;
1190                _mesa_Scissor(scissor->X, scissor->Y,
1191                              scissor->Width, scissor->Height);
1192                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1193             }
1194             break;
1195          case GL_STENCIL_BUFFER_BIT:
1196             {
1197                const struct gl_stencil_attrib *stencil;
1198                stencil = (const struct gl_stencil_attrib *) attr->data;
1199                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1200                _mesa_ClearStencil(stencil->Clear);
1201                if (ctx->Extensions.EXT_stencil_two_side) {
1202                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1203                                    stencil->TestTwoSide);
1204                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1205                                              ? GL_BACK : GL_FRONT);
1206                }
1207                /* front state */
1208                _mesa_StencilFuncSeparate(GL_FRONT,
1209                                          stencil->Function[0],
1210                                          stencil->Ref[0],
1211                                          stencil->ValueMask[0]);
1212                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1213                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1214                                        stencil->ZFailFunc[0],
1215                                        stencil->ZPassFunc[0]);
1216                /* back state */
1217                _mesa_StencilFuncSeparate(GL_BACK,
1218                                          stencil->Function[1],
1219                                          stencil->Ref[1],
1220                                          stencil->ValueMask[1]);
1221                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1222                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1223                                        stencil->ZFailFunc[1],
1224                                        stencil->ZPassFunc[1]);
1225             }
1226             break;
1227          case GL_TRANSFORM_BIT:
1228             {
1229                GLuint i;
1230                const struct gl_transform_attrib *xform;
1231                xform = (const struct gl_transform_attrib *) attr->data;
1232                _mesa_MatrixMode(xform->MatrixMode);
1233                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1234                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1235
1236                /* restore clip planes */
1237                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1238                   const GLuint mask = 1 << i;
1239                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1240                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1241                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1242                                    !!(xform->ClipPlanesEnabled & mask));
1243                   if (ctx->Driver.ClipPlane)
1244                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1245                }
1246
1247                /* normalize/rescale */
1248                if (xform->Normalize != ctx->Transform.Normalize)
1249                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1250                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1251                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1252                                    ctx->Transform.RescaleNormals);
1253                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1254                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1255                                    ctx->Transform.DepthClamp);
1256             }
1257             break;
1258          case GL_TEXTURE_BIT:
1259             {
1260                struct texture_state *texstate
1261                   = (struct texture_state *) attr->data;
1262                pop_texture_group(ctx, texstate);
1263                ctx->NewState |= _NEW_TEXTURE;
1264             }
1265             break;
1266          case GL_VIEWPORT_BIT:
1267             {
1268                const struct gl_viewport_attrib *vp;
1269                vp = (const struct gl_viewport_attrib *) attr->data;
1270                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1271                _mesa_DepthRange(vp->Near, vp->Far);
1272             }
1273             break;
1274          case GL_MULTISAMPLE_BIT_ARB:
1275             {
1276                const struct gl_multisample_attrib *ms;
1277                ms = (const struct gl_multisample_attrib *) attr->data;
1278
1279                TEST_AND_UPDATE(ctx->Multisample.Enabled,
1280                                ms->Enabled,
1281                                GL_MULTISAMPLE);
1282
1283                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
1284                                ms->SampleCoverage,
1285                                GL_SAMPLE_COVERAGE);
1286
1287                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
1288                                ms->SampleAlphaToCoverage,
1289                                GL_SAMPLE_ALPHA_TO_COVERAGE);
1290
1291                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
1292                                ms->SampleAlphaToOne,
1293                                GL_SAMPLE_ALPHA_TO_ONE);
1294
1295                _mesa_SampleCoverage(ms->SampleCoverageValue,
1296                                        ms->SampleCoverageInvert);
1297             }
1298             break;
1299
1300          default:
1301             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1302             break;
1303       }
1304
1305       next = attr->next;
1306       free(attr->data);
1307       free(attr);
1308       attr = next;
1309    }
1310 }
1311
1312
1313 /**
1314  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1315  * object refcounts.
1316  */
1317 static void
1318 copy_pixelstore(struct gl_context *ctx,
1319                 struct gl_pixelstore_attrib *dst,
1320                 const struct gl_pixelstore_attrib *src)
1321 {
1322    dst->Alignment = src->Alignment;
1323    dst->RowLength = src->RowLength;
1324    dst->SkipPixels = src->SkipPixels;
1325    dst->SkipRows = src->SkipRows;
1326    dst->ImageHeight = src->ImageHeight;
1327    dst->SkipImages = src->SkipImages;
1328    dst->SwapBytes = src->SwapBytes;
1329    dst->LsbFirst = src->LsbFirst;
1330    dst->Invert = src->Invert;
1331    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1332 }
1333
1334
1335 #define GL_CLIENT_PACK_BIT (1<<20)
1336 #define GL_CLIENT_UNPACK_BIT (1<<21)
1337
1338 /**
1339  * Copy gl_array_object from src to dest.
1340  * 'dest' must be in an initialized state.
1341  */
1342 static void
1343 copy_array_object(struct gl_context *ctx,
1344                   struct gl_array_object *dest,
1345                   struct gl_array_object *src)
1346 {
1347    GLuint i;
1348
1349    /* skip Name */
1350    /* skip RefCount */
1351
1352    /* In theory must be the same anyway, but on recreate make sure it matches */
1353    dest->ARBsemantics = src->ARBsemantics;
1354
1355    for (i = 0; i < Elements(src->VertexAttrib); i++)
1356       _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1357
1358    /* _Enabled must be the same than on push */
1359    dest->_Enabled = src->_Enabled;
1360    dest->_MaxElement = src->_MaxElement;
1361 }
1362
1363 /**
1364  * Copy gl_array_attrib from src to dest.
1365  * 'dest' must be in an initialized state.
1366  */
1367 static void
1368 copy_array_attrib(struct gl_context *ctx,
1369                   struct gl_array_attrib *dest,
1370                   struct gl_array_attrib *src,
1371                   bool vbo_deleted)
1372 {
1373    /* skip ArrayObj */
1374    /* skip DefaultArrayObj, Objects */
1375    dest->ActiveTexture = src->ActiveTexture;
1376    dest->LockFirst = src->LockFirst;
1377    dest->LockCount = src->LockCount;
1378    dest->PrimitiveRestart = src->PrimitiveRestart;
1379    dest->PrimitiveRestartFixedIndex = src->PrimitiveRestartFixedIndex;
1380    dest->_PrimitiveRestart = src->_PrimitiveRestart;
1381    dest->RestartIndex = src->RestartIndex;
1382    dest->_RestartIndex = src->_RestartIndex;
1383    /* skip NewState */
1384    /* skip RebindArrays */
1385
1386    if (!vbo_deleted)
1387       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1388
1389    /* skip ArrayBufferObj */
1390    /* skip ElementArrayBufferObj */
1391 }
1392
1393 /**
1394  * Save the content of src to dest.
1395  */
1396 static void
1397 save_array_attrib(struct gl_context *ctx,
1398                   struct gl_array_attrib *dest,
1399                   struct gl_array_attrib *src)
1400 {
1401    /* Set the Name, needed for restore, but do never overwrite.
1402     * Needs to match value in the object hash. */
1403    dest->ArrayObj->Name = src->ArrayObj->Name;
1404    /* And copy all of the rest. */
1405    copy_array_attrib(ctx, dest, src, false);
1406
1407    /* Just reference them here */
1408    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1409                                  src->ArrayBufferObj);
1410    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1411                                  src->ArrayObj->ElementArrayBufferObj);
1412 }
1413
1414 /**
1415  * Restore the content of src to dest.
1416  */
1417 static void
1418 restore_array_attrib(struct gl_context *ctx,
1419                      struct gl_array_attrib *dest,
1420                      struct gl_array_attrib *src)
1421 {
1422    /* The ARB_vertex_array_object spec says:
1423     *
1424     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1425     *     if array is not a name returned from a previous call to
1426     *     GenVertexArrays, or if such a name has since been deleted with
1427     *     DeleteVertexArrays."
1428     *
1429     * Therefore popping a deleted VAO cannot magically recreate it.
1430     *
1431     * The semantics of objects created using APPLE_vertex_array_objects behave
1432     * differently.  These objects expect to be recreated by pop.  Alas.
1433     */
1434    const bool arb_vao = (src->ArrayObj->Name != 0
1435                          && src->ArrayObj->ARBsemantics);
1436
1437    if (arb_vao && !_mesa_IsVertexArray(src->ArrayObj->Name))
1438       return;
1439
1440    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1441
1442    /* Restore or recreate the buffer objects by the names ... */
1443    if (!arb_vao
1444        || src->ArrayBufferObj->Name == 0
1445        || _mesa_IsBuffer(src->ArrayBufferObj->Name)) {
1446       /* ... and restore its content */
1447       copy_array_attrib(ctx, dest, src, false);
1448
1449       _mesa_BindBuffer(GL_ARRAY_BUFFER_ARB,
1450                           src->ArrayBufferObj->Name);
1451    } else {
1452       copy_array_attrib(ctx, dest, src, true);
1453    }
1454
1455    if (!arb_vao
1456        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1457        || _mesa_IsBuffer(src->ArrayObj->ElementArrayBufferObj->Name))
1458       _mesa_BindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB,
1459                           src->ArrayObj->ElementArrayBufferObj->Name);
1460 }
1461
1462 /**
1463  * init/alloc the fields of 'attrib'.
1464  * Needs to the init part matching free_array_attrib_data below.
1465  */
1466 static void
1467 init_array_attrib_data(struct gl_context *ctx,
1468                        struct gl_array_attrib *attrib)
1469 {
1470    /* Get a non driver gl_array_object. */
1471    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1472    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1473 }
1474
1475 /**
1476  * Free/unreference the fields of 'attrib' but don't delete it (that's
1477  * done later in the calling code).
1478  * Needs to the cleanup part matching init_array_attrib_data above.
1479  */
1480 static void
1481 free_array_attrib_data(struct gl_context *ctx,
1482                        struct gl_array_attrib *attrib)
1483 {
1484    /* We use a non driver array object, so don't just unref since we would
1485     * end up using the drivers DeleteArrayObject function for deletion. */
1486    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1487    attrib->ArrayObj = 0;
1488    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1489 }
1490
1491
1492 void GLAPIENTRY
1493 _mesa_PushClientAttrib(GLbitfield mask)
1494 {
1495    struct gl_attrib_node *head;
1496
1497    GET_CURRENT_CONTEXT(ctx);
1498
1499    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1500       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1501       return;
1502    }
1503
1504    /* Build linked list of attribute nodes which save all attribute
1505     * groups specified by the mask.
1506     */
1507    head = NULL;
1508
1509    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1510       struct gl_pixelstore_attrib *attr;
1511       /* packing attribs */
1512       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1513       copy_pixelstore(ctx, attr, &ctx->Pack);
1514       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1515       /* unpacking attribs */
1516       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1517       copy_pixelstore(ctx, attr, &ctx->Unpack);
1518       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1519    }
1520
1521    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1522       struct gl_array_attrib *attr;
1523       attr = CALLOC_STRUCT( gl_array_attrib );
1524       init_array_attrib_data(ctx, attr);
1525       save_array_attrib(ctx, attr, &ctx->Array);
1526       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1527    }
1528
1529    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1530    ctx->ClientAttribStackDepth++;
1531 }
1532
1533
1534
1535
1536 void GLAPIENTRY
1537 _mesa_PopClientAttrib(void)
1538 {
1539    struct gl_attrib_node *node, *next;
1540
1541    GET_CURRENT_CONTEXT(ctx);
1542    FLUSH_VERTICES(ctx, 0);
1543
1544    if (ctx->ClientAttribStackDepth == 0) {
1545       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1546       return;
1547    }
1548
1549    ctx->ClientAttribStackDepth--;
1550    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1551
1552    while (node) {
1553       switch (node->kind) {
1554          case GL_CLIENT_PACK_BIT:
1555             {
1556                struct gl_pixelstore_attrib *store =
1557                   (struct gl_pixelstore_attrib *) node->data;
1558                copy_pixelstore(ctx, &ctx->Pack, store);
1559                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1560             }
1561             ctx->NewState |= _NEW_PACKUNPACK;
1562             break;
1563          case GL_CLIENT_UNPACK_BIT:
1564             {
1565                struct gl_pixelstore_attrib *store =
1566                   (struct gl_pixelstore_attrib *) node->data;
1567                copy_pixelstore(ctx, &ctx->Unpack, store);
1568                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1569             }
1570             ctx->NewState |= _NEW_PACKUNPACK;
1571             break;
1572          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1573             struct gl_array_attrib * attr =
1574               (struct gl_array_attrib *) node->data;
1575             restore_array_attrib(ctx, &ctx->Array, attr);
1576             free_array_attrib_data(ctx, attr);
1577             ctx->NewState |= _NEW_ARRAY;
1578             break;
1579          }
1580          default:
1581             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1582             break;
1583       }
1584
1585       next = node->next;
1586       free(node->data);
1587       free(node);
1588       node = next;
1589    }
1590 }
1591
1592
1593 /**
1594  * Free any attribute state data that might be attached to the context.
1595  */
1596 void
1597 _mesa_free_attrib_data(struct gl_context *ctx)
1598 {
1599    while (ctx->AttribStackDepth > 0) {
1600       struct gl_attrib_node *attr, *next;
1601
1602       ctx->AttribStackDepth--;
1603       attr = ctx->AttribStack[ctx->AttribStackDepth];
1604
1605       while (attr) {
1606          if (attr->kind == GL_TEXTURE_BIT) {
1607             struct texture_state *texstate = (struct texture_state*)attr->data;
1608             GLuint u, tgt;
1609             /* clear references to the saved texture objects */
1610             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1611                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1612                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1613                }
1614             }
1615             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1616          }
1617          else {
1618             /* any other chunks of state that requires special handling? */
1619          }
1620
1621          next = attr->next;
1622          free(attr->data);
1623          free(attr);
1624          attr = next;
1625       }
1626    }
1627 }
1628
1629
1630 void _mesa_init_attrib( struct gl_context *ctx )
1631 {
1632    /* Renderer and client attribute stacks */
1633    ctx->AttribStackDepth = 0;
1634    ctx->ClientAttribStackDepth = 0;
1635 }