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 "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 Map1Attrib[16];  /* GL_NV_vertex_program */
  97    GLboolean Map2Color4;
  98    GLboolean Map2Index;
  99    GLboolean Map2Normal;
 100    GLboolean Map2TextureCoord1;
 101    GLboolean Map2TextureCoord2;
 102    GLboolean Map2TextureCoord3;
 103    GLboolean Map2TextureCoord4;
 104    GLboolean Map2Vertex3;
 105    GLboolean Map2Vertex4;
 106    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 107
 108    GLboolean Normalize;
 109    GLboolean PixelTexture;
 110    GLboolean PointSmooth;
 111    GLboolean PolygonOffsetPoint;
 112    GLboolean PolygonOffsetLine;
 113    GLboolean PolygonOffsetFill;
 114    GLboolean PolygonSmooth;
 115    GLboolean PolygonStipple;
 116    GLboolean RescaleNormals;
 117    GLboolean Scissor;
 118    GLboolean Stencil;
 119    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 120    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 121    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 122    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 123    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 124    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 125    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 126
 127    GLbitfield Texture[MAX_TEXTURE_UNITS];
 128    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 129
 130    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 131    GLboolean VertexProgram;
 132    GLboolean VertexProgramPointSize;
 133    GLboolean VertexProgramTwoSide;
 134
 135    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 136    GLboolean PointSprite;
 137    GLboolean FragmentShaderATI;
 138 };
 139
 140
 141 /**
 142  * Node for the attribute stack.
 143  */
 144 struct gl_attrib_node
 145 {
 146    GLbitfield kind;
 147    void *data;
 148    struct gl_attrib_node *next;
 149 };
 150
 151
 152
 153 /**
 154  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 155  */
 156 struct texture_state
 157 {
 158    struct gl_texture_attrib Texture;  /**< The usual context state */
 159
 160    /** to save per texture object state (wrap modes, filters, etc): */
 161    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 162
 163    /**
 164     * To save references to texture objects (so they don't get accidentally
 165     * deleted while saved in the attribute stack).
 166     */
 167    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 168 };
 169
 170
 171 #if FEATURE_attrib_stack
 172
 173
 174 /**
 175  * Allocate new attribute node of given type/kind.  Attach payload data.
 176  * Insert it into the linked list named by 'head'.
 177  */
 178 static void
 179 save_attrib_data(struct gl_attrib_node **head,
 180                  GLbitfield kind, void *payload)
 181 {
 182    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 183    if (n) {
 184       n->kind = kind;
 185       n->data = payload;
 186       /* insert at head */
 187       n->next = *head;
 188       *head = n;
 189    }
 190    else {
 191       /* out of memory! */
 192    }
 193 }
 194
 195
 196 void GLAPIENTRY
 197 _mesa_PushAttrib(GLbitfield mask)
 198 {
 199    struct gl_attrib_node *head;
 200
 201    GET_CURRENT_CONTEXT(ctx);
 202    ASSERT_OUTSIDE_BEGIN_END(ctx);
 203
 204    if (MESA_VERBOSE & VERBOSE_API)
 205       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 206
 207    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 208       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 209       return;
 210    }
 211
 212    /* Build linked list of attribute nodes which save all attribute */
 213    /* groups specified by the mask. */
 214    head = NULL;
 215
 216    if (mask & GL_ACCUM_BUFFER_BIT) {
 217       struct gl_accum_attrib *attr;
 218       attr = MALLOC_STRUCT( gl_accum_attrib );
 219       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 220       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 221    }
 222
 223    if (mask & GL_COLOR_BUFFER_BIT) {
 224       GLuint i;
 225       struct gl_colorbuffer_attrib *attr;
 226       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 227       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 228       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 229       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 230          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 231       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 232    }
 233
 234    if (mask & GL_CURRENT_BIT) {
 235       struct gl_current_attrib *attr;
 236       FLUSH_CURRENT( ctx, 0 );
 237       attr = MALLOC_STRUCT( gl_current_attrib );
 238       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 239       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 240    }
 241
 242    if (mask & GL_DEPTH_BUFFER_BIT) {
 243       struct gl_depthbuffer_attrib *attr;
 244       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 245       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 246       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 247    }
 248
 249    if (mask & GL_ENABLE_BIT) {
 250       struct gl_enable_attrib *attr;
 251       GLuint i;
 252       attr = MALLOC_STRUCT( gl_enable_attrib );
 253       /* Copy enable flags from all other attributes into the enable struct. */
 254       attr->AlphaTest = ctx->Color.AlphaEnabled;
 255       attr->AutoNormal = ctx->Eval.AutoNormal;
 256       attr->Blend = ctx->Color.BlendEnabled;
 257       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 258       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 259       attr->CullFace = ctx->Polygon.CullFlag;
 260       attr->DepthClamp = ctx->Transform.DepthClamp;
 261       attr->DepthTest = ctx->Depth.Test;
 262       attr->Dither = ctx->Color.DitherFlag;
 263       attr->Fog = ctx->Fog.Enabled;
 264       for (i = 0; i < ctx->Const.MaxLights; i++) {
 265          attr->Light[i] = ctx->Light.Light[i].Enabled;
 266       }
 267       attr->Lighting = ctx->Light.Enabled;
 268       attr->LineSmooth = ctx->Line.SmoothFlag;
 269       attr->LineStipple = ctx->Line.StippleFlag;
 270       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 271       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 272       attr->Map1Color4 = ctx->Eval.Map1Color4;
 273       attr->Map1Index = ctx->Eval.Map1Index;
 274       attr->Map1Normal = ctx->Eval.Map1Normal;
 275       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 276       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 277       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 278       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 279       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 280       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 281       memcpy(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 282       attr->Map2Color4 = ctx->Eval.Map2Color4;
 283       attr->Map2Index = ctx->Eval.Map2Index;
 284       attr->Map2Normal = ctx->Eval.Map2Normal;
 285       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 286       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 287       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 288       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 289       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 290       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 291       memcpy(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 292       attr->Normalize = ctx->Transform.Normalize;
 293       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 294       attr->PointSmooth = ctx->Point.SmoothFlag;
 295       attr->PointSprite = ctx->Point.PointSprite;
 296       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 297       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 298       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 299       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 300       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 301       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 302       attr->Scissor = ctx->Scissor.Enabled;
 303       attr->Stencil = ctx->Stencil.Enabled;
 304       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 305       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 306       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 307       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 308       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 309       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 310       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 311          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 312          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 313       }
 314       /* GL_NV_vertex_program */
 315       attr->VertexProgram = ctx->VertexProgram.Enabled;
 316       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 317       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 318       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 319    }
 320
 321    if (mask & GL_EVAL_BIT) {
 322       struct gl_eval_attrib *attr;
 323       attr = MALLOC_STRUCT( gl_eval_attrib );
 324       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 325       save_attrib_data(&head, GL_EVAL_BIT, attr);
 326    }
 327
 328    if (mask & GL_FOG_BIT) {
 329       struct gl_fog_attrib *attr;
 330       attr = MALLOC_STRUCT( gl_fog_attrib );
 331       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 332       save_attrib_data(&head, GL_FOG_BIT, attr);
 333    }
 334
 335    if (mask & GL_HINT_BIT) {
 336       struct gl_hint_attrib *attr;
 337       attr = MALLOC_STRUCT( gl_hint_attrib );
 338       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 339       save_attrib_data(&head, GL_HINT_BIT, attr);
 340    }
 341
 342    if (mask & GL_LIGHTING_BIT) {
 343       struct gl_light_attrib *attr;
 344       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 345       attr = MALLOC_STRUCT( gl_light_attrib );
 346       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 347       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 348    }
 349
 350    if (mask & GL_LINE_BIT) {
 351       struct gl_line_attrib *attr;
 352       attr = MALLOC_STRUCT( gl_line_attrib );
 353       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 354       save_attrib_data(&head, GL_LINE_BIT, attr);
 355    }
 356
 357    if (mask & GL_LIST_BIT) {
 358       struct gl_list_attrib *attr;
 359       attr = MALLOC_STRUCT( gl_list_attrib );
 360       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 361       save_attrib_data(&head, GL_LIST_BIT, attr);
 362    }
 363
 364    if (mask & GL_PIXEL_MODE_BIT) {
 365       struct gl_pixel_attrib *attr;
 366       attr = MALLOC_STRUCT( gl_pixel_attrib );
 367       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 368       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 369       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 370       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 371    }
 372
 373    if (mask & GL_POINT_BIT) {
 374       struct gl_point_attrib *attr;
 375       attr = MALLOC_STRUCT( gl_point_attrib );
 376       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 377       save_attrib_data(&head, GL_POINT_BIT, attr);
 378    }
 379
 380    if (mask & GL_POLYGON_BIT) {
 381       struct gl_polygon_attrib *attr;
 382       attr = MALLOC_STRUCT( gl_polygon_attrib );
 383       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 384       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 385    }
 386
 387    if (mask & GL_POLYGON_STIPPLE_BIT) {
 388       GLuint *stipple;
 389       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 390       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 391       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 392    }
 393
 394    if (mask & GL_SCISSOR_BIT) {
 395       struct gl_scissor_attrib *attr;
 396       attr = MALLOC_STRUCT( gl_scissor_attrib );
 397       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 398       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 399    }
 400
 401    if (mask & GL_STENCIL_BUFFER_BIT) {
 402       struct gl_stencil_attrib *attr;
 403       attr = MALLOC_STRUCT( gl_stencil_attrib );
 404       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 405       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 406    }
 407
 408    if (mask & GL_TEXTURE_BIT) {
 409       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 410       GLuint u, tex;
 411
 412       if (!texstate) {
 413          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 414          goto end;
 415       }
 416
 417       _mesa_lock_context_textures(ctx);
 418
 419       /* copy/save the bulk of texture state here */
 420       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 421
 422       /* Save references to the currently bound texture objects so they don't
 423        * accidentally get deleted while referenced in the attribute stack.
 424        */
 425       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 426          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 427             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 428                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 429          }
 430       }
 431
 432       /* copy state/contents of the currently bound texture objects */
 433       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 434          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 435             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 436                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 437          }
 438       }
 439
 440       _mesa_unlock_context_textures(ctx);
 441
 442       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 443    }
 444
 445    if (mask & GL_TRANSFORM_BIT) {
 446       struct gl_transform_attrib *attr;
 447       attr = MALLOC_STRUCT( gl_transform_attrib );
 448       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 449       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 450    }
 451
 452    if (mask & GL_VIEWPORT_BIT) {
 453       struct gl_viewport_attrib *attr;
 454       attr = MALLOC_STRUCT( gl_viewport_attrib );
 455       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 456       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 457    }
 458
 459    /* GL_ARB_multisample */
 460    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 461       struct gl_multisample_attrib *attr;
 462       attr = MALLOC_STRUCT( gl_multisample_attrib );
 463       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 464       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 465    }
 466
 467 end:
 468    ctx->AttribStack[ctx->AttribStackDepth] = head;
 469    ctx->AttribStackDepth++;
 470 }
 471
 472
 473
 474 static void
 475 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 476 {
 477    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 478    GLuint i;
 479
 480 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 481         if ((VALUE) != (NEWVALUE)) {                    \
 482            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 483         }
 484
 485    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 486    if (ctx->Color.BlendEnabled != enable->Blend) {
 487       if (ctx->Extensions.EXT_draw_buffers2) {
 488          GLuint i;
 489          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 490             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 491          }
 492       }
 493       else {
 494          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 495       }
 496    }
 497
 498    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 499       const GLuint mask = 1 << i;
 500       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 501           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 502                            !!(enable->ClipPlanes & mask));
 503    }
 504
 505    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 506                    GL_COLOR_MATERIAL);
 507    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 508    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 509                    GL_DEPTH_CLAMP);
 510    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 511    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 512    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 513    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 514    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 515    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 516                    GL_LINE_STIPPLE);
 517    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 518                    GL_INDEX_LOGIC_OP);
 519    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 520                    GL_COLOR_LOGIC_OP);
 521
 522    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 523    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 524    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 525    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 526                    GL_MAP1_TEXTURE_COORD_1);
 527    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 528                    GL_MAP1_TEXTURE_COORD_2);
 529    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 530                    GL_MAP1_TEXTURE_COORD_3);
 531    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 532                    GL_MAP1_TEXTURE_COORD_4);
 533    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 534                    GL_MAP1_VERTEX_3);
 535    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 536                    GL_MAP1_VERTEX_4);
 537    for (i = 0; i < 16; i++) {
 538       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 539                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 540    }
 541
 542    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 543    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 544    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 545    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 546                    GL_MAP2_TEXTURE_COORD_1);
 547    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 548                    GL_MAP2_TEXTURE_COORD_2);
 549    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 550                    GL_MAP2_TEXTURE_COORD_3);
 551    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 552                    GL_MAP2_TEXTURE_COORD_4);
 553    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 554                    GL_MAP2_VERTEX_3);
 555    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 556                    GL_MAP2_VERTEX_4);
 557    for (i = 0; i < 16; i++) {
 558       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 559                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 560    }
 561
 562    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 563    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 564    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 565                    GL_RESCALE_NORMAL_EXT);
 566    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 567                    enable->RasterPositionUnclipped,
 568                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 569    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 570                    GL_POINT_SMOOTH);
 571    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 572       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 573                       GL_POINT_SPRITE_NV);
 574    }
 575    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 576                    GL_POLYGON_OFFSET_POINT);
 577    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 578                    GL_POLYGON_OFFSET_LINE);
 579    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 580                    GL_POLYGON_OFFSET_FILL);
 581    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 582                    GL_POLYGON_SMOOTH);
 583    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 584                    GL_POLYGON_STIPPLE);
 585    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 586    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 587    if (ctx->Extensions.EXT_stencil_two_side) {
 588       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 589    }
 590    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 591                    GL_MULTISAMPLE_ARB);
 592    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 593                    enable->SampleAlphaToCoverage,
 594                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 595    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 596                    enable->SampleAlphaToOne,
 597                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 598    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 599                    enable->SampleCoverage,
 600                    GL_SAMPLE_COVERAGE_ARB);
 601    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 602                    enable->SampleCoverageInvert,
 603                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 604    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 605    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 606                    enable->VertexProgram,
 607                    GL_VERTEX_PROGRAM_ARB);
 608    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 609                    enable->VertexProgramPointSize,
 610                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 611    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 612                    enable->VertexProgramTwoSide,
 613                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 614
 615 #undef TEST_AND_UPDATE
 616
 617    /* texture unit enables */
 618    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 619       const GLbitfield enabled = enable->Texture[i];
 620       const GLbitfield genEnabled = enable->TexGen[i];
 621
 622       if (ctx->Texture.Unit[i].Enabled != enabled) {
 623          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 624
 625          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 626          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 627          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 628          if (ctx->Extensions.NV_texture_rectangle) {
 629             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 630                              !!(enabled & TEXTURE_RECT_BIT));
 631          }
 632          if (ctx->Extensions.ARB_texture_cube_map) {
 633             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 634                              !!(enabled & TEXTURE_CUBE_BIT));
 635          }
 636          if (ctx->Extensions.MESA_texture_array) {
 637             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 638                              !!(enabled & TEXTURE_1D_ARRAY_BIT));
 639             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 640                              !!(enabled & TEXTURE_2D_ARRAY_BIT));
 641          }
 642       }
 643
 644       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 645          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 646          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 647          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 648          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 649          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 650       }
 651    }
 652
 653    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 654 }
 655
 656
 657 /**
 658  * Pop/restore texture attribute/group state.
 659  */
 660 static void
 661 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 662 {
 663    GLuint u;
 664
 665    _mesa_lock_context_textures(ctx);
 666
 667    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 668       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 669       GLuint tgt;
 670
 671       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 672       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 673       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 674       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 675       if (ctx->Extensions.ARB_texture_cube_map) {
 676          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 677                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 678       }
 679       if (ctx->Extensions.NV_texture_rectangle) {
 680          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 681                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 682       }
 683       if (ctx->Extensions.MESA_texture_array) {
 684          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 685                           !!(unit->Enabled & TEXTURE_1D_ARRAY_BIT));
 686          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 687                           !!(unit->Enabled & TEXTURE_2D_ARRAY_BIT));
 688       }
 689
 690       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 691       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 692       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 693       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 694       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 695       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 696       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 697       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 698       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 699       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 700       /* Eye plane done differently to avoid re-transformation */
 701       {
 702          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 703          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 704          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 705          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 706          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 707          if (ctx->Driver.TexGen) {
 708             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 709             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 710             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 711             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 712          }
 713       }
 714       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 715       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 716       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 717       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 718       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 719                     unit->LodBias);
 720       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 721                     unit->Combine.ModeRGB);
 722       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 723                     unit->Combine.ModeA);
 724       {
 725          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 726          GLuint i;
 727          for (i = 0; i < n; i++) {
 728             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 729                           unit->Combine.SourceRGB[i]);
 730             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 731                           unit->Combine.SourceA[i]);
 732             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 733                           unit->Combine.OperandRGB[i]);
 734             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 735                           unit->Combine.OperandA[i]);
 736          }
 737       }
 738       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 739                     1 << unit->Combine.ScaleShiftRGB);
 740       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 741                     1 << unit->Combine.ScaleShiftA);
 742
 743       /* Restore texture object state for each target */
 744       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 745          const struct gl_texture_object *obj = NULL;
 746          const struct gl_sampler_object *samp;
 747          GLenum target;
 748
 749          obj = &texstate->SavedObj[u][tgt];
 750
 751          /* don't restore state for unsupported targets to prevent
 752           * raising GL errors.
 753           */
 754          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 755              !ctx->Extensions.ARB_texture_cube_map) {
 756             continue;
 757          }
 758          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 759                   !ctx->Extensions.NV_texture_rectangle) {
 760             continue;
 761          }
 762          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 763                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 764                   !ctx->Extensions.MESA_texture_array) {
 765             continue;
 766          }
 767          else if (obj->Target == GL_TEXTURE_BUFFER)
 768             continue;
 769          else if (obj->Target == GL_TEXTURE_EXTERNAL_OES)
 770             continue;
 771
 772          target = obj->Target;
 773
 774          _mesa_BindTexture(target, obj->Name);
 775
 776          samp = &obj->Sampler;
 777
 778          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 779          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 780          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 781          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 782          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 783          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 784          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 785          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 786          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 787          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 788          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 789          if (target != GL_TEXTURE_RECTANGLE_ARB)
 790             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 791          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 792             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 793                                 samp->MaxAnisotropy);
 794          }
 795          if (ctx->Extensions.ARB_shadow_ambient) {
 796             _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
 797                                 samp->CompareFailValue);
 798          }
 799       }
 800
 801       /* remove saved references to the texture objects */
 802       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 803          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 804       }
 805    }
 806
 807    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 808
 809    _mesa_unlock_context_textures(ctx);
 810 }
 811
 812
 813 /*
 814  * This function is kind of long just because we have to call a lot
 815  * of device driver functions to update device driver state.
 816  *
 817  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 818  * in order to restore GL state.  This isn't terribly efficient but it
 819  * ensures that dirty flags and any derived state gets updated correctly.
 820  * We could at least check if the value to restore equals the current value
 821  * and then skip the Mesa call.
 822  */
 823 void GLAPIENTRY
 824 _mesa_PopAttrib(void)
 825 {
 826    struct gl_attrib_node *attr, *next;
 827    GET_CURRENT_CONTEXT(ctx);
 828    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 829
 830    if (ctx->AttribStackDepth == 0) {
 831       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 832       return;
 833    }
 834
 835    ctx->AttribStackDepth--;
 836    attr = ctx->AttribStack[ctx->AttribStackDepth];
 837
 838    while (attr) {
 839
 840       if (MESA_VERBOSE & VERBOSE_API) {
 841          _mesa_debug(ctx, "glPopAttrib %s\n",
 842                      _mesa_lookup_enum_by_nr(attr->kind));
 843       }
 844
 845       switch (attr->kind) {
 846          case GL_ACCUM_BUFFER_BIT:
 847             {
 848                const struct gl_accum_attrib *accum;
 849                accum = (const struct gl_accum_attrib *) attr->data;
 850                _mesa_ClearAccum(accum->ClearColor[0],
 851                                 accum->ClearColor[1],
 852                                 accum->ClearColor[2],
 853                                 accum->ClearColor[3]);
 854             }
 855             break;
 856          case GL_COLOR_BUFFER_BIT:
 857             {
 858                const struct gl_colorbuffer_attrib *color;
 859
 860                color = (const struct gl_colorbuffer_attrib *) attr->data;
 861                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 862                _mesa_ClearColor(color->ClearColor.f[0],
 863                                 color->ClearColor.f[1],
 864                                 color->ClearColor.f[2],
 865                                 color->ClearColor.f[3]);
 866                _mesa_IndexMask(color->IndexMask);
 867                if (!ctx->Extensions.EXT_draw_buffers2) {
 868                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 869                                   (GLboolean) (color->ColorMask[0][1] != 0),
 870                                   (GLboolean) (color->ColorMask[0][2] != 0),
 871                                   (GLboolean) (color->ColorMask[0][3] != 0));
 872                }
 873                else {
 874                   GLuint i;
 875                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 876                      _mesa_ColorMaskIndexed(i,
 877                                   (GLboolean) (color->ColorMask[i][0] != 0),
 878                                   (GLboolean) (color->ColorMask[i][1] != 0),
 879                                   (GLboolean) (color->ColorMask[i][2] != 0),
 880                                   (GLboolean) (color->ColorMask[i][3] != 0));
 881                   }
 882                }
 883                {
 884                   /* Need to determine if more than one color output is
 885                    * specified.  If so, call glDrawBuffersARB, else call
 886                    * glDrawBuffer().  This is a subtle, but essential point
 887                    * since GL_FRONT (for example) is illegal for the former
 888                    * function, but legal for the later.
 889                    */
 890                   GLboolean multipleBuffers = GL_FALSE;
 891                   GLuint i;
 892
 893                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 894                      if (color->DrawBuffer[i] != GL_NONE) {
 895                         multipleBuffers = GL_TRUE;
 896                         break;
 897                      }
 898                   }
 899                   /* Call the API_level functions, not _mesa_drawbuffers()
 900                    * since we need to do error checking on the pop'd
 901                    * GL_DRAW_BUFFER.
 902                    * Ex: if GL_FRONT were pushed, but we're popping with a
 903                    * user FBO bound, GL_FRONT will be illegal and we'll need
 904                    * to record that error.  Per OpenGL ARB decision.
 905                    */
 906                   if (multipleBuffers)
 907                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 908                                           color->DrawBuffer);
 909                   else
 910                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 911                }
 912                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 913                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 914                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 915                   if (ctx->Extensions.EXT_draw_buffers2) {
 916                      GLuint i;
 917                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 918                         _mesa_set_enablei(ctx, GL_BLEND, i,
 919                                           (color->BlendEnabled >> i) & 1);
 920                      }
 921                   }
 922                   else {
 923                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 924                   }
 925                }
 926                if (ctx->Color._BlendFuncPerBuffer ||
 927                    ctx->Color._BlendEquationPerBuffer) {
 928                   /* set blend per buffer */
 929                   GLuint buf;
 930                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
 931                      _mesa_BlendFuncSeparatei(buf, color->Blend[buf].SrcRGB,
 932                                               color->Blend[buf].DstRGB,
 933                                               color->Blend[buf].SrcA,
 934                                               color->Blend[buf].DstA);
 935                      _mesa_BlendEquationSeparatei(buf,
 936                                                   color->Blend[buf].EquationRGB,
 937                                                   color->Blend[buf].EquationA);
 938                   }
 939                }
 940                else {
 941                   /* set same blend modes for all buffers */
 942                   _mesa_BlendFuncSeparateEXT(color->Blend[0].SrcRGB,
 943                                              color->Blend[0].DstRGB,
 944                                              color->Blend[0].SrcA,
 945                                              color->Blend[0].DstA);
 946                   /* This special case is because glBlendEquationSeparateEXT
 947                    * cannot take GL_LOGIC_OP as a parameter.
 948                    */
 949                   if (color->Blend[0].EquationRGB ==
 950                       color->Blend[0].EquationA) {
 951                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
 952                   }
 953                   else {
 954                      _mesa_BlendEquationSeparateEXT(
 955                                                  color->Blend[0].EquationRGB,
 956                                                  color->Blend[0].EquationA);
 957                   }
 958                }
 959                _mesa_BlendColor(color->BlendColorUnclamped[0],
 960                                 color->BlendColorUnclamped[1],
 961                                 color->BlendColorUnclamped[2],
 962                                 color->BlendColorUnclamped[3]);
 963                _mesa_LogicOp(color->LogicOp);
 964                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 965                                 color->ColorLogicOpEnabled);
 966                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 967                                 color->IndexLogicOpEnabled);
 968                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 969                _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, color->ClampFragmentColor);
 970                _mesa_ClampColorARB(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 971             }
 972             break;
 973          case GL_CURRENT_BIT:
 974             FLUSH_CURRENT( ctx, 0 );
 975             memcpy( &ctx->Current, attr->data,
 976                     sizeof(struct gl_current_attrib) );
 977             break;
 978          case GL_DEPTH_BUFFER_BIT:
 979             {
 980                const struct gl_depthbuffer_attrib *depth;
 981                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 982                _mesa_DepthFunc(depth->Func);
 983                _mesa_ClearDepth(depth->Clear);
 984                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 985                _mesa_DepthMask(depth->Mask);
 986             }
 987             break;
 988          case GL_ENABLE_BIT:
 989             {
 990                const struct gl_enable_attrib *enable;
 991                enable = (const struct gl_enable_attrib *) attr->data;
 992                pop_enable_group(ctx, enable);
 993                ctx->NewState |= _NEW_ALL;
 994             }
 995             break;
 996          case GL_EVAL_BIT:
 997             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 998             ctx->NewState |= _NEW_EVAL;
 999             break;
1000          case GL_FOG_BIT:
1001             {
1002                const struct gl_fog_attrib *fog;
1003                fog = (const struct gl_fog_attrib *) attr->data;
1004                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1005                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1006                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1007                _mesa_Fogf(GL_FOG_START, fog->Start);
1008                _mesa_Fogf(GL_FOG_END, fog->End);
1009                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1010                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1011             }
1012             break;
1013          case GL_HINT_BIT:
1014             {
1015                const struct gl_hint_attrib *hint;
1016                hint = (const struct gl_hint_attrib *) attr->data;
1017                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1018                           hint->PerspectiveCorrection );
1019                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1020                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1021                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1022                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1023                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1024                           hint->ClipVolumeClipping);
1025                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1026                           hint->TextureCompression);
1027             }
1028             break;
1029          case GL_LIGHTING_BIT:
1030             {
1031                GLuint i;
1032                const struct gl_light_attrib *light;
1033                light = (const struct gl_light_attrib *) attr->data;
1034                /* lighting enable */
1035                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1036                /* per-light state */
1037                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1038                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1039
1040                for (i = 0; i < ctx->Const.MaxLights; i++) {
1041                   const struct gl_light *l = &light->Light[i];
1042                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1043                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1044                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1045                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1046                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1047                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1048                   {
1049                      GLfloat p[4] = { 0 };
1050                      p[0] = l->SpotExponent;
1051                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1052                   }
1053                   {
1054                      GLfloat p[4] = { 0 };
1055                      p[0] = l->SpotCutoff;
1056                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1057                   }
1058                   {
1059                      GLfloat p[4] = { 0 };
1060                      p[0] = l->ConstantAttenuation;
1061                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1062                   }
1063                   {
1064                      GLfloat p[4] = { 0 };
1065                      p[0] = l->LinearAttenuation;
1066                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1067                   }
1068                   {
1069                      GLfloat p[4] = { 0 };
1070                      p[0] = l->QuadraticAttenuation;
1071                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1072                   }
1073                }
1074                /* light model */
1075                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1076                                   light->Model.Ambient);
1077                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1078                                  (GLfloat) light->Model.LocalViewer);
1079                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1080                                  (GLfloat) light->Model.TwoSide);
1081                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1082                                  (GLfloat) light->Model.ColorControl);
1083                /* shade model */
1084                _mesa_ShadeModel(light->ShadeModel);
1085                /* color material */
1086                _mesa_ColorMaterial(light->ColorMaterialFace,
1087                                    light->ColorMaterialMode);
1088                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1089                                 light->ColorMaterialEnabled);
1090                /* materials */
1091                memcpy(&ctx->Light.Material, &light->Material,
1092                       sizeof(struct gl_material));
1093                _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, light->ClampVertexColor);
1094             }
1095             break;
1096          case GL_LINE_BIT:
1097             {
1098                const struct gl_line_attrib *line;
1099                line = (const struct gl_line_attrib *) attr->data;
1100                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1101                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1102                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1103                _mesa_LineWidth(line->Width);
1104             }
1105             break;
1106          case GL_LIST_BIT:
1107             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1108             break;
1109          case GL_PIXEL_MODE_BIT:
1110             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1111             /* XXX what other pixel state needs to be set by function calls? */
1112             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1113             ctx->NewState |= _NEW_PIXEL;
1114             break;
1115          case GL_POINT_BIT:
1116             {
1117                const struct gl_point_attrib *point;
1118                point = (const struct gl_point_attrib *) attr->data;
1119                _mesa_PointSize(point->Size);
1120                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1121                if (ctx->Extensions.EXT_point_parameters) {
1122                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1123                                          point->Params);
1124                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1125                                         point->MinSize);
1126                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1127                                         point->MaxSize);
1128                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1129                                         point->Threshold);
1130                }
1131                if (ctx->Extensions.NV_point_sprite
1132                    || ctx->Extensions.ARB_point_sprite) {
1133                   GLuint u;
1134                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1135                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1136                                    (GLint) point->CoordReplace[u]);
1137                   }
1138                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1139                   if (ctx->Extensions.NV_point_sprite)
1140                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1141                                            ctx->Point.SpriteRMode);
1142                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1143                                         (GLfloat)ctx->Point.SpriteOrigin);
1144                }
1145             }
1146             break;
1147          case GL_POLYGON_BIT:
1148             {
1149                const struct gl_polygon_attrib *polygon;
1150                polygon = (const struct gl_polygon_attrib *) attr->data;
1151                _mesa_CullFace(polygon->CullFaceMode);
1152                _mesa_FrontFace(polygon->FrontFace);
1153                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1154                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1155                _mesa_PolygonOffset(polygon->OffsetFactor,
1156                                    polygon->OffsetUnits);
1157                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1158                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1159                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1160                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1161                                 polygon->OffsetPoint);
1162                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1163                                 polygon->OffsetLine);
1164                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1165                                 polygon->OffsetFill);
1166             }
1167             break;
1168          case GL_POLYGON_STIPPLE_BIT:
1169             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1170             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1171             if (ctx->Driver.PolygonStipple)
1172                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1173             break;
1174          case GL_SCISSOR_BIT:
1175             {
1176                const struct gl_scissor_attrib *scissor;
1177                scissor = (const struct gl_scissor_attrib *) attr->data;
1178                _mesa_Scissor(scissor->X, scissor->Y,
1179                              scissor->Width, scissor->Height);
1180                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1181             }
1182             break;
1183          case GL_STENCIL_BUFFER_BIT:
1184             {
1185                const struct gl_stencil_attrib *stencil;
1186                stencil = (const struct gl_stencil_attrib *) attr->data;
1187                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1188                _mesa_ClearStencil(stencil->Clear);
1189                if (ctx->Extensions.EXT_stencil_two_side) {
1190                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1191                                    stencil->TestTwoSide);
1192                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1193                                              ? GL_BACK : GL_FRONT);
1194                }
1195                /* front state */
1196                _mesa_StencilFuncSeparate(GL_FRONT,
1197                                          stencil->Function[0],
1198                                          stencil->Ref[0],
1199                                          stencil->ValueMask[0]);
1200                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1201                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1202                                        stencil->ZFailFunc[0],
1203                                        stencil->ZPassFunc[0]);
1204                /* back state */
1205                _mesa_StencilFuncSeparate(GL_BACK,
1206                                          stencil->Function[1],
1207                                          stencil->Ref[1],
1208                                          stencil->ValueMask[1]);
1209                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1210                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1211                                        stencil->ZFailFunc[1],
1212                                        stencil->ZPassFunc[1]);
1213             }
1214             break;
1215          case GL_TRANSFORM_BIT:
1216             {
1217                GLuint i;
1218                const struct gl_transform_attrib *xform;
1219                xform = (const struct gl_transform_attrib *) attr->data;
1220                _mesa_MatrixMode(xform->MatrixMode);
1221                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1222                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1223
1224                /* restore clip planes */
1225                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1226                   const GLuint mask = 1 << i;
1227                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1228                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1229                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1230                                    !!(xform->ClipPlanesEnabled & mask));
1231                   if (ctx->Driver.ClipPlane)
1232                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1233                }
1234
1235                /* normalize/rescale */
1236                if (xform->Normalize != ctx->Transform.Normalize)
1237                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1238                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1239                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1240                                    ctx->Transform.RescaleNormals);
1241                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1242                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1243                                    ctx->Transform.DepthClamp);
1244             }
1245             break;
1246          case GL_TEXTURE_BIT:
1247             /* Take care of texture object reference counters */
1248             {
1249                struct texture_state *texstate
1250                   = (struct texture_state *) attr->data;
1251                pop_texture_group(ctx, texstate);
1252                ctx->NewState |= _NEW_TEXTURE;
1253             }
1254             break;
1255          case GL_VIEWPORT_BIT:
1256             {
1257                const struct gl_viewport_attrib *vp;
1258                vp = (const struct gl_viewport_attrib *) attr->data;
1259                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1260                _mesa_DepthRange(vp->Near, vp->Far);
1261             }
1262             break;
1263          case GL_MULTISAMPLE_BIT_ARB:
1264             {
1265                const struct gl_multisample_attrib *ms;
1266                ms = (const struct gl_multisample_attrib *) attr->data;
1267                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1268                                        ms->SampleCoverageInvert);
1269             }
1270             break;
1271
1272          default:
1273             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1274             break;
1275       }
1276
1277       next = attr->next;
1278       FREE( attr->data );
1279       FREE( attr );
1280       attr = next;
1281    }
1282 }
1283
1284
1285 /**
1286  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1287  * object refcounts.
1288  */
1289 static void
1290 copy_pixelstore(struct gl_context *ctx,
1291                 struct gl_pixelstore_attrib *dst,
1292                 const struct gl_pixelstore_attrib *src)
1293 {
1294    dst->Alignment = src->Alignment;
1295    dst->RowLength = src->RowLength;
1296    dst->SkipPixels = src->SkipPixels;
1297    dst->SkipRows = src->SkipRows;
1298    dst->ImageHeight = src->ImageHeight;
1299    dst->SkipImages = src->SkipImages;
1300    dst->SwapBytes = src->SwapBytes;
1301    dst->LsbFirst = src->LsbFirst;
1302    dst->Invert = src->Invert;
1303    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1304 }
1305
1306
1307 #define GL_CLIENT_PACK_BIT (1<<20)
1308 #define GL_CLIENT_UNPACK_BIT (1<<21)
1309
1310 /**
1311  * Copy gl_array_object from src to dest.
1312  * 'dest' must be in an initialized state.
1313  */
1314 static void
1315 copy_array_object(struct gl_context *ctx,
1316                   struct gl_array_object *dest,
1317                   struct gl_array_object *src)
1318 {
1319    GLuint i;
1320
1321    /* skip Name */
1322    /* skip RefCount */
1323
1324    /* In theory must be the same anyway, but on recreate make sure it matches */
1325    dest->ARBsemantics = src->ARBsemantics;
1326
1327    for (i = 0; i < Elements(src->VertexAttrib); i++)
1328       _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1329
1330    /* _Enabled must be the same than on push */
1331    dest->_Enabled = src->_Enabled;
1332    dest->_MaxElement = src->_MaxElement;
1333 }
1334
1335 /**
1336  * Copy gl_array_attrib from src to dest.
1337  * 'dest' must be in an initialized state.
1338  */
1339 static void
1340 copy_array_attrib(struct gl_context *ctx,
1341                   struct gl_array_attrib *dest,
1342                   struct gl_array_attrib *src,
1343                   bool vbo_deleted)
1344 {
1345    /* skip ArrayObj */
1346    /* skip DefaultArrayObj, Objects */
1347    dest->ActiveTexture = src->ActiveTexture;
1348    dest->LockFirst = src->LockFirst;
1349    dest->LockCount = src->LockCount;
1350    dest->PrimitiveRestart = src->PrimitiveRestart;
1351    dest->RestartIndex = src->RestartIndex;
1352    /* skip NewState */
1353    /* skip RebindArrays */
1354
1355    if (!vbo_deleted)
1356       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1357
1358    /* skip ArrayBufferObj */
1359    /* skip ElementArrayBufferObj */
1360 }
1361
1362 /**
1363  * Save the content of src to dest.
1364  */
1365 static void
1366 save_array_attrib(struct gl_context *ctx,
1367                   struct gl_array_attrib *dest,
1368                   struct gl_array_attrib *src)
1369 {
1370    /* Set the Name, needed for restore, but do never overwrite.
1371     * Needs to match value in the object hash. */
1372    dest->ArrayObj->Name = src->ArrayObj->Name;
1373    /* And copy all of the rest. */
1374    copy_array_attrib(ctx, dest, src, false);
1375
1376    /* Just reference them here */
1377    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1378                                  src->ArrayBufferObj);
1379    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1380                                  src->ArrayObj->ElementArrayBufferObj);
1381 }
1382
1383 /**
1384  * Restore the content of src to dest.
1385  */
1386 static void
1387 restore_array_attrib(struct gl_context *ctx,
1388                      struct gl_array_attrib *dest,
1389                      struct gl_array_attrib *src)
1390 {
1391    /* The ARB_vertex_array_object spec says:
1392     *
1393     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1394     *     if array is not a name returned from a previous call to
1395     *     GenVertexArrays, or if such a name has since been deleted with
1396     *     DeleteVertexArrays."
1397     *
1398     * Therefore popping a deleted VAO cannot magically recreate it.
1399     *
1400     * The semantics of objects created using APPLE_vertex_array_objects behave
1401     * differently.  These objects expect to be recreated by pop.  Alas.
1402     */
1403    const bool arb_vao = (src->ArrayObj->Name != 0
1404                          && src->ArrayObj->ARBsemantics);
1405
1406    if (arb_vao && !_mesa_IsVertexArrayAPPLE(src->ArrayObj->Name))
1407       return;
1408
1409    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1410
1411    /* Restore or recreate the buffer objects by the names ... */
1412    if (!arb_vao
1413        || src->ArrayBufferObj->Name == 0
1414        || _mesa_IsBufferARB(src->ArrayBufferObj->Name)) {
1415       /* ... and restore its content */
1416       copy_array_attrib(ctx, dest, src, false);
1417
1418       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1419                           src->ArrayBufferObj->Name);
1420    } else {
1421       copy_array_attrib(ctx, dest, src, true);
1422    }
1423
1424    if (!arb_vao
1425        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1426        || _mesa_IsBufferARB(src->ArrayObj->ElementArrayBufferObj->Name))
1427       _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1428                           src->ArrayObj->ElementArrayBufferObj->Name);
1429
1430    /* Better safe than sorry?! */
1431    dest->RebindArrays = GL_TRUE;
1432
1433    /* FIXME: Should some bits in ctx->Array->NewState also be set
1434     * FIXME: here?  It seems like it should be set to inclusive-or
1435     * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1436     * ... just do it.
1437     */
1438    dest->NewState |= src->ArrayObj->_Enabled | dest->ArrayObj->_Enabled;
1439 }
1440
1441 /**
1442  * init/alloc the fields of 'attrib'.
1443  * Needs to the init part matching free_array_attrib_data below.
1444  */
1445 static void
1446 init_array_attrib_data(struct gl_context *ctx,
1447                        struct gl_array_attrib *attrib)
1448 {
1449    /* Get a non driver gl_array_object. */
1450    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1451    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1452 }
1453
1454 /**
1455  * Free/unreference the fields of 'attrib' but don't delete it (that's
1456  * done later in the calling code).
1457  * Needs to the cleanup part matching init_array_attrib_data above.
1458  */
1459 static void
1460 free_array_attrib_data(struct gl_context *ctx,
1461                        struct gl_array_attrib *attrib)
1462 {
1463    /* We use a non driver array object, so don't just unref since we would
1464     * end up using the drivers DeleteArrayObject function for deletion. */
1465    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1466    attrib->ArrayObj = 0;
1467    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1468 }
1469
1470
1471 void GLAPIENTRY
1472 _mesa_PushClientAttrib(GLbitfield mask)
1473 {
1474    struct gl_attrib_node *head;
1475
1476    GET_CURRENT_CONTEXT(ctx);
1477    ASSERT_OUTSIDE_BEGIN_END(ctx);
1478
1479    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1480       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1481       return;
1482    }
1483
1484    /* Build linked list of attribute nodes which save all attribute
1485     * groups specified by the mask.
1486     */
1487    head = NULL;
1488
1489    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1490       struct gl_pixelstore_attrib *attr;
1491       /* packing attribs */
1492       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1493       copy_pixelstore(ctx, attr, &ctx->Pack);
1494       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1495       /* unpacking attribs */
1496       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1497       copy_pixelstore(ctx, attr, &ctx->Unpack);
1498       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1499    }
1500
1501    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1502       struct gl_array_attrib *attr;
1503       attr = CALLOC_STRUCT( gl_array_attrib );
1504       init_array_attrib_data(ctx, attr);
1505       save_array_attrib(ctx, attr, &ctx->Array);
1506       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1507    }
1508
1509    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1510    ctx->ClientAttribStackDepth++;
1511 }
1512
1513
1514
1515
1516 void GLAPIENTRY
1517 _mesa_PopClientAttrib(void)
1518 {
1519    struct gl_attrib_node *node, *next;
1520
1521    GET_CURRENT_CONTEXT(ctx);
1522    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1523
1524    if (ctx->ClientAttribStackDepth == 0) {
1525       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1526       return;
1527    }
1528
1529    ctx->ClientAttribStackDepth--;
1530    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1531
1532    while (node) {
1533       switch (node->kind) {
1534          case GL_CLIENT_PACK_BIT:
1535             {
1536                struct gl_pixelstore_attrib *store =
1537                   (struct gl_pixelstore_attrib *) node->data;
1538                copy_pixelstore(ctx, &ctx->Pack, store);
1539                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1540             }
1541             ctx->NewState |= _NEW_PACKUNPACK;
1542             break;
1543          case GL_CLIENT_UNPACK_BIT:
1544             {
1545                struct gl_pixelstore_attrib *store =
1546                   (struct gl_pixelstore_attrib *) node->data;
1547                copy_pixelstore(ctx, &ctx->Unpack, store);
1548                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1549             }
1550             ctx->NewState |= _NEW_PACKUNPACK;
1551             break;
1552          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1553             struct gl_array_attrib * attr =
1554               (struct gl_array_attrib *) node->data;
1555             restore_array_attrib(ctx, &ctx->Array, attr);
1556             free_array_attrib_data(ctx, attr);
1557             ctx->NewState |= _NEW_ARRAY;
1558             break;
1559          }
1560          default:
1561             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1562             break;
1563       }
1564
1565       next = node->next;
1566       FREE( node->data );
1567       FREE( node );
1568       node = next;
1569    }
1570 }
1571
1572
1573 void
1574 _mesa_init_attrib_dispatch(struct _glapi_table *disp)
1575 {
1576    SET_PopAttrib(disp, _mesa_PopAttrib);
1577    SET_PushAttrib(disp, _mesa_PushAttrib);
1578    SET_PopClientAttrib(disp, _mesa_PopClientAttrib);
1579    SET_PushClientAttrib(disp, _mesa_PushClientAttrib);
1580 }
1581
1582
1583 #endif /* FEATURE_attrib_stack */
1584
1585
1586 /**
1587  * Free any attribute state data that might be attached to the context.
1588  */
1589 void
1590 _mesa_free_attrib_data(struct gl_context *ctx)
1591 {
1592    while (ctx->AttribStackDepth > 0) {
1593       struct gl_attrib_node *attr, *next;
1594
1595       ctx->AttribStackDepth--;
1596       attr = ctx->AttribStack[ctx->AttribStackDepth];
1597
1598       while (attr) {
1599          if (attr->kind == GL_TEXTURE_BIT) {
1600             struct texture_state *texstate = (struct texture_state*)attr->data;
1601             GLuint u, tgt;
1602             /* clear references to the saved texture objects */
1603             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1604                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1605                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1606                }
1607             }
1608          }
1609          else {
1610             /* any other chunks of state that requires special handling? */
1611          }
1612
1613          next = attr->next;
1614          free(attr->data);
1615          free(attr);
1616          attr = next;
1617       }
1618    }
1619 }
1620
1621
1622 void _mesa_init_attrib( struct gl_context *ctx )
1623 {
1624    /* Renderer and client attribute stacks */
1625    ctx->AttribStackDepth = 0;
1626    ctx->ClientAttribStackDepth = 0;
1627 }