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 Map1Attrib[16];  /* GL_NV_vertex_program */
  98    GLboolean Map2Color4;
  99    GLboolean Map2Index;
 100    GLboolean Map2Normal;
 101    GLboolean Map2TextureCoord1;
 102    GLboolean Map2TextureCoord2;
 103    GLboolean Map2TextureCoord3;
 104    GLboolean Map2TextureCoord4;
 105    GLboolean Map2Vertex3;
 106    GLboolean Map2Vertex4;
 107    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 108
 109    GLboolean Normalize;
 110    GLboolean PixelTexture;
 111    GLboolean PointSmooth;
 112    GLboolean PolygonOffsetPoint;
 113    GLboolean PolygonOffsetLine;
 114    GLboolean PolygonOffsetFill;
 115    GLboolean PolygonSmooth;
 116    GLboolean PolygonStipple;
 117    GLboolean RescaleNormals;
 118    GLboolean Scissor;
 119    GLboolean Stencil;
 120    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 121    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 122    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 123    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 124    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 125    GLboolean 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    /* We need to keep a reference to the shared state.  That's where the
 170     * default texture objects are kept.  We don't want that state to be
 171     * freed while the attribute stack contains pointers to any default
 172     * texture objects.
 173     */
 174    struct gl_shared_state *SharedRef;
 175 };
 176
 177
 178 #if FEATURE_attrib_stack
 179
 180
 181 /**
 182  * Allocate new attribute node of given type/kind.  Attach payload data.
 183  * Insert it into the linked list named by 'head'.
 184  */
 185 static void
 186 save_attrib_data(struct gl_attrib_node **head,
 187                  GLbitfield kind, void *payload)
 188 {
 189    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 190    if (n) {
 191       n->kind = kind;
 192       n->data = payload;
 193       /* insert at head */
 194       n->next = *head;
 195       *head = n;
 196    }
 197    else {
 198       /* out of memory! */
 199    }
 200 }
 201
 202
 203 void GLAPIENTRY
 204 _mesa_PushAttrib(GLbitfield mask)
 205 {
 206    struct gl_attrib_node *head;
 207
 208    GET_CURRENT_CONTEXT(ctx);
 209    ASSERT_OUTSIDE_BEGIN_END(ctx);
 210
 211    if (MESA_VERBOSE & VERBOSE_API)
 212       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 213
 214    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 215       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 216       return;
 217    }
 218
 219    /* Build linked list of attribute nodes which save all attribute */
 220    /* groups specified by the mask. */
 221    head = NULL;
 222
 223    if (mask & GL_ACCUM_BUFFER_BIT) {
 224       struct gl_accum_attrib *attr;
 225       attr = MALLOC_STRUCT( gl_accum_attrib );
 226       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 227       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 228    }
 229
 230    if (mask & GL_COLOR_BUFFER_BIT) {
 231       GLuint i;
 232       struct gl_colorbuffer_attrib *attr;
 233       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 234       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 235       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 236       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 237          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 238       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 239    }
 240
 241    if (mask & GL_CURRENT_BIT) {
 242       struct gl_current_attrib *attr;
 243       FLUSH_CURRENT( ctx, 0 );
 244       attr = MALLOC_STRUCT( gl_current_attrib );
 245       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 246       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 247    }
 248
 249    if (mask & GL_DEPTH_BUFFER_BIT) {
 250       struct gl_depthbuffer_attrib *attr;
 251       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 252       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 253       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 254    }
 255
 256    if (mask & GL_ENABLE_BIT) {
 257       struct gl_enable_attrib *attr;
 258       GLuint i;
 259       attr = MALLOC_STRUCT( gl_enable_attrib );
 260       /* Copy enable flags from all other attributes into the enable struct. */
 261       attr->AlphaTest = ctx->Color.AlphaEnabled;
 262       attr->AutoNormal = ctx->Eval.AutoNormal;
 263       attr->Blend = ctx->Color.BlendEnabled;
 264       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 265       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 266       attr->CullFace = ctx->Polygon.CullFlag;
 267       attr->DepthClamp = ctx->Transform.DepthClamp;
 268       attr->DepthTest = ctx->Depth.Test;
 269       attr->Dither = ctx->Color.DitherFlag;
 270       attr->Fog = ctx->Fog.Enabled;
 271       for (i = 0; i < ctx->Const.MaxLights; i++) {
 272          attr->Light[i] = ctx->Light.Light[i].Enabled;
 273       }
 274       attr->Lighting = ctx->Light.Enabled;
 275       attr->LineSmooth = ctx->Line.SmoothFlag;
 276       attr->LineStipple = ctx->Line.StippleFlag;
 277       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 278       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 279       attr->Map1Color4 = ctx->Eval.Map1Color4;
 280       attr->Map1Index = ctx->Eval.Map1Index;
 281       attr->Map1Normal = ctx->Eval.Map1Normal;
 282       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 283       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 284       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 285       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 286       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 287       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 288       memcpy(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 289       attr->Map2Color4 = ctx->Eval.Map2Color4;
 290       attr->Map2Index = ctx->Eval.Map2Index;
 291       attr->Map2Normal = ctx->Eval.Map2Normal;
 292       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 293       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 294       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 295       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 296       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 297       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 298       memcpy(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 299       attr->Normalize = ctx->Transform.Normalize;
 300       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 301       attr->PointSmooth = ctx->Point.SmoothFlag;
 302       attr->PointSprite = ctx->Point.PointSprite;
 303       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 304       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 305       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 306       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 307       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 308       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 309       attr->Scissor = ctx->Scissor.Enabled;
 310       attr->Stencil = ctx->Stencil.Enabled;
 311       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 312       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 313       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 314       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 315       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 316       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 317          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 318          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 319       }
 320       /* GL_NV_vertex_program */
 321       attr->VertexProgram = ctx->VertexProgram.Enabled;
 322       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 323       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 324       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 325    }
 326
 327    if (mask & GL_EVAL_BIT) {
 328       struct gl_eval_attrib *attr;
 329       attr = MALLOC_STRUCT( gl_eval_attrib );
 330       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 331       save_attrib_data(&head, GL_EVAL_BIT, attr);
 332    }
 333
 334    if (mask & GL_FOG_BIT) {
 335       struct gl_fog_attrib *attr;
 336       attr = MALLOC_STRUCT( gl_fog_attrib );
 337       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 338       save_attrib_data(&head, GL_FOG_BIT, attr);
 339    }
 340
 341    if (mask & GL_HINT_BIT) {
 342       struct gl_hint_attrib *attr;
 343       attr = MALLOC_STRUCT( gl_hint_attrib );
 344       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 345       save_attrib_data(&head, GL_HINT_BIT, attr);
 346    }
 347
 348    if (mask & GL_LIGHTING_BIT) {
 349       struct gl_light_attrib *attr;
 350       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 351       attr = MALLOC_STRUCT( gl_light_attrib );
 352       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 353       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 354    }
 355
 356    if (mask & GL_LINE_BIT) {
 357       struct gl_line_attrib *attr;
 358       attr = MALLOC_STRUCT( gl_line_attrib );
 359       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 360       save_attrib_data(&head, GL_LINE_BIT, attr);
 361    }
 362
 363    if (mask & GL_LIST_BIT) {
 364       struct gl_list_attrib *attr;
 365       attr = MALLOC_STRUCT( gl_list_attrib );
 366       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 367       save_attrib_data(&head, GL_LIST_BIT, attr);
 368    }
 369
 370    if (mask & GL_PIXEL_MODE_BIT) {
 371       struct gl_pixel_attrib *attr;
 372       attr = MALLOC_STRUCT( gl_pixel_attrib );
 373       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 374       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 375       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 376       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 377    }
 378
 379    if (mask & GL_POINT_BIT) {
 380       struct gl_point_attrib *attr;
 381       attr = MALLOC_STRUCT( gl_point_attrib );
 382       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 383       save_attrib_data(&head, GL_POINT_BIT, attr);
 384    }
 385
 386    if (mask & GL_POLYGON_BIT) {
 387       struct gl_polygon_attrib *attr;
 388       attr = MALLOC_STRUCT( gl_polygon_attrib );
 389       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 390       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 391    }
 392
 393    if (mask & GL_POLYGON_STIPPLE_BIT) {
 394       GLuint *stipple;
 395       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 396       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 397       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 398    }
 399
 400    if (mask & GL_SCISSOR_BIT) {
 401       struct gl_scissor_attrib *attr;
 402       attr = MALLOC_STRUCT( gl_scissor_attrib );
 403       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 404       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 405    }
 406
 407    if (mask & GL_STENCIL_BUFFER_BIT) {
 408       struct gl_stencil_attrib *attr;
 409       attr = MALLOC_STRUCT( gl_stencil_attrib );
 410       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 411       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 412    }
 413
 414    if (mask & GL_TEXTURE_BIT) {
 415       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 416       GLuint u, tex;
 417
 418       if (!texstate) {
 419          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 420          goto end;
 421       }
 422
 423       _mesa_lock_context_textures(ctx);
 424
 425       /* copy/save the bulk of texture state here */
 426       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 427
 428       /* Save references to the currently bound texture objects so they don't
 429        * accidentally get deleted while referenced in the attribute stack.
 430        */
 431       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 432          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 433             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 434                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 435          }
 436       }
 437
 438       /* copy state/contents of the currently bound texture objects */
 439       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 440          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 441             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 442                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 443          }
 444       }
 445
 446       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 447
 448       _mesa_unlock_context_textures(ctx);
 449
 450       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 451    }
 452
 453    if (mask & GL_TRANSFORM_BIT) {
 454       struct gl_transform_attrib *attr;
 455       attr = MALLOC_STRUCT( gl_transform_attrib );
 456       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 457       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 458    }
 459
 460    if (mask & GL_VIEWPORT_BIT) {
 461       struct gl_viewport_attrib *attr;
 462       attr = MALLOC_STRUCT( gl_viewport_attrib );
 463       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 464       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 465    }
 466
 467    /* GL_ARB_multisample */
 468    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 469       struct gl_multisample_attrib *attr;
 470       attr = MALLOC_STRUCT( gl_multisample_attrib );
 471       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 472       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 473    }
 474
 475 end:
 476    ctx->AttribStack[ctx->AttribStackDepth] = head;
 477    ctx->AttribStackDepth++;
 478 }
 479
 480
 481
 482 static void
 483 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 484 {
 485    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 486    GLuint i;
 487
 488 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 489         if ((VALUE) != (NEWVALUE)) {                    \
 490            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 491         }
 492
 493    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 494    if (ctx->Color.BlendEnabled != enable->Blend) {
 495       if (ctx->Extensions.EXT_draw_buffers2) {
 496          GLuint i;
 497          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 498             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 499          }
 500       }
 501       else {
 502          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 503       }
 504    }
 505
 506    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 507       const GLuint mask = 1 << i;
 508       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 509           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 510                            !!(enable->ClipPlanes & mask));
 511    }
 512
 513    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 514                    GL_COLOR_MATERIAL);
 515    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 516    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 517                    GL_DEPTH_CLAMP);
 518    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 519    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 520    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 521    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 522    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 523    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 524                    GL_LINE_STIPPLE);
 525    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 526                    GL_INDEX_LOGIC_OP);
 527    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 528                    GL_COLOR_LOGIC_OP);
 529
 530    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 531    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 532    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 533    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 534                    GL_MAP1_TEXTURE_COORD_1);
 535    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 536                    GL_MAP1_TEXTURE_COORD_2);
 537    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 538                    GL_MAP1_TEXTURE_COORD_3);
 539    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 540                    GL_MAP1_TEXTURE_COORD_4);
 541    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 542                    GL_MAP1_VERTEX_3);
 543    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 544                    GL_MAP1_VERTEX_4);
 545    for (i = 0; i < 16; i++) {
 546       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 547                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 548    }
 549
 550    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 551    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 552    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 553    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 554                    GL_MAP2_TEXTURE_COORD_1);
 555    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 556                    GL_MAP2_TEXTURE_COORD_2);
 557    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 558                    GL_MAP2_TEXTURE_COORD_3);
 559    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 560                    GL_MAP2_TEXTURE_COORD_4);
 561    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 562                    GL_MAP2_VERTEX_3);
 563    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 564                    GL_MAP2_VERTEX_4);
 565    for (i = 0; i < 16; i++) {
 566       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 567                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 568    }
 569
 570    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 571    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 572    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 573                    GL_RESCALE_NORMAL_EXT);
 574    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 575                    enable->RasterPositionUnclipped,
 576                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 577    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 578                    GL_POINT_SMOOTH);
 579    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 580       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 581                       GL_POINT_SPRITE_NV);
 582    }
 583    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 584                    GL_POLYGON_OFFSET_POINT);
 585    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 586                    GL_POLYGON_OFFSET_LINE);
 587    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 588                    GL_POLYGON_OFFSET_FILL);
 589    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 590                    GL_POLYGON_SMOOTH);
 591    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 592                    GL_POLYGON_STIPPLE);
 593    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 594    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 595    if (ctx->Extensions.EXT_stencil_two_side) {
 596       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 597    }
 598    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 599                    GL_MULTISAMPLE_ARB);
 600    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 601                    enable->SampleAlphaToCoverage,
 602                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 603    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 604                    enable->SampleAlphaToOne,
 605                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 606    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 607                    enable->SampleCoverage,
 608                    GL_SAMPLE_COVERAGE_ARB);
 609    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 610    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 611                    enable->VertexProgram,
 612                    GL_VERTEX_PROGRAM_ARB);
 613    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 614                    enable->VertexProgramPointSize,
 615                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 616    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 617                    enable->VertexProgramTwoSide,
 618                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 619
 620 #undef TEST_AND_UPDATE
 621
 622    /* texture unit enables */
 623    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 624       const GLbitfield enabled = enable->Texture[i];
 625       const GLbitfield genEnabled = enable->TexGen[i];
 626
 627       if (ctx->Texture.Unit[i].Enabled != enabled) {
 628          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 629
 630          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 631          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 632          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 633          if (ctx->Extensions.NV_texture_rectangle) {
 634             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 635                              !!(enabled & TEXTURE_RECT_BIT));
 636          }
 637          if (ctx->Extensions.ARB_texture_cube_map) {
 638             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 639                              !!(enabled & TEXTURE_CUBE_BIT));
 640          }
 641          if (ctx->Extensions.MESA_texture_array) {
 642             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 643                              !!(enabled & TEXTURE_1D_ARRAY_BIT));
 644             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 645                              !!(enabled & TEXTURE_2D_ARRAY_BIT));
 646          }
 647       }
 648
 649       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 650          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 651          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 652          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 653          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 654          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 655       }
 656    }
 657
 658    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 659 }
 660
 661
 662 /**
 663  * Pop/restore texture attribute/group state.
 664  */
 665 static void
 666 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 667 {
 668    GLuint u;
 669
 670    _mesa_lock_context_textures(ctx);
 671
 672    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 673       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 674       GLuint tgt;
 675
 676       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 677       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 678       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 679       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 680       if (ctx->Extensions.ARB_texture_cube_map) {
 681          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 682                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 683       }
 684       if (ctx->Extensions.NV_texture_rectangle) {
 685          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 686                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 687       }
 688       if (ctx->Extensions.MESA_texture_array) {
 689          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 690                           !!(unit->Enabled & TEXTURE_1D_ARRAY_BIT));
 691          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 692                           !!(unit->Enabled & TEXTURE_2D_ARRAY_BIT));
 693       }
 694
 695       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 696       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 697       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 698       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 699       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 700       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 701       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 702       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 703       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 704       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 705       /* Eye plane done differently to avoid re-transformation */
 706       {
 707          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 708          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 709          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 710          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 711          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 712          if (ctx->Driver.TexGen) {
 713             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 714             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 715             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 716             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 717          }
 718       }
 719       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 720       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 721       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 722       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 723       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 724                     unit->LodBias);
 725       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 726                     unit->Combine.ModeRGB);
 727       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 728                     unit->Combine.ModeA);
 729       {
 730          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 731          GLuint i;
 732          for (i = 0; i < n; i++) {
 733             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 734                           unit->Combine.SourceRGB[i]);
 735             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 736                           unit->Combine.SourceA[i]);
 737             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 738                           unit->Combine.OperandRGB[i]);
 739             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 740                           unit->Combine.OperandA[i]);
 741          }
 742       }
 743       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 744                     1 << unit->Combine.ScaleShiftRGB);
 745       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 746                     1 << unit->Combine.ScaleShiftA);
 747
 748       /* Restore texture object state for each target */
 749       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 750          const struct gl_texture_object *obj = NULL;
 751          const struct gl_sampler_object *samp;
 752          GLenum target;
 753
 754          obj = &texstate->SavedObj[u][tgt];
 755
 756          /* don't restore state for unsupported targets to prevent
 757           * raising GL errors.
 758           */
 759          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 760              !ctx->Extensions.ARB_texture_cube_map) {
 761             continue;
 762          }
 763          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 764                   !ctx->Extensions.NV_texture_rectangle) {
 765             continue;
 766          }
 767          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 768                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 769                   !ctx->Extensions.MESA_texture_array) {
 770             continue;
 771          }
 772          else if (obj->Target == GL_TEXTURE_BUFFER)
 773             continue;
 774          else if (obj->Target == GL_TEXTURE_EXTERNAL_OES)
 775             continue;
 776
 777          target = obj->Target;
 778
 779          _mesa_BindTexture(target, obj->Name);
 780
 781          samp = &obj->Sampler;
 782
 783          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 784          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 785          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 786          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 787          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 788          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 789          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 790          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 791          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 792          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 793          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 794          if (target != GL_TEXTURE_RECTANGLE_ARB)
 795             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 796          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 797             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 798                                 samp->MaxAnisotropy);
 799          }
 800          if (ctx->Extensions.ARB_shadow_ambient) {
 801             _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
 802                                 samp->CompareFailValue);
 803          }
 804       }
 805
 806       /* remove saved references to the texture objects */
 807       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 808          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 809       }
 810    }
 811
 812    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 813
 814    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 815
 816    _mesa_unlock_context_textures(ctx);
 817 }
 818
 819
 820 /*
 821  * This function is kind of long just because we have to call a lot
 822  * of device driver functions to update device driver state.
 823  *
 824  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 825  * in order to restore GL state.  This isn't terribly efficient but it
 826  * ensures that dirty flags and any derived state gets updated correctly.
 827  * We could at least check if the value to restore equals the current value
 828  * and then skip the Mesa call.
 829  */
 830 void GLAPIENTRY
 831 _mesa_PopAttrib(void)
 832 {
 833    struct gl_attrib_node *attr, *next;
 834    GET_CURRENT_CONTEXT(ctx);
 835    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 836
 837    if (ctx->AttribStackDepth == 0) {
 838       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 839       return;
 840    }
 841
 842    ctx->AttribStackDepth--;
 843    attr = ctx->AttribStack[ctx->AttribStackDepth];
 844
 845    while (attr) {
 846
 847       if (MESA_VERBOSE & VERBOSE_API) {
 848          _mesa_debug(ctx, "glPopAttrib %s\n",
 849                      _mesa_lookup_enum_by_nr(attr->kind));
 850       }
 851
 852       switch (attr->kind) {
 853          case GL_ACCUM_BUFFER_BIT:
 854             {
 855                const struct gl_accum_attrib *accum;
 856                accum = (const struct gl_accum_attrib *) attr->data;
 857                _mesa_ClearAccum(accum->ClearColor[0],
 858                                 accum->ClearColor[1],
 859                                 accum->ClearColor[2],
 860                                 accum->ClearColor[3]);
 861             }
 862             break;
 863          case GL_COLOR_BUFFER_BIT:
 864             {
 865                const struct gl_colorbuffer_attrib *color;
 866
 867                color = (const struct gl_colorbuffer_attrib *) attr->data;
 868                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 869                _mesa_ClearColor(color->ClearColor.f[0],
 870                                 color->ClearColor.f[1],
 871                                 color->ClearColor.f[2],
 872                                 color->ClearColor.f[3]);
 873                _mesa_IndexMask(color->IndexMask);
 874                if (!ctx->Extensions.EXT_draw_buffers2) {
 875                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 876                                   (GLboolean) (color->ColorMask[0][1] != 0),
 877                                   (GLboolean) (color->ColorMask[0][2] != 0),
 878                                   (GLboolean) (color->ColorMask[0][3] != 0));
 879                }
 880                else {
 881                   GLuint i;
 882                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 883                      _mesa_ColorMaskIndexed(i,
 884                                   (GLboolean) (color->ColorMask[i][0] != 0),
 885                                   (GLboolean) (color->ColorMask[i][1] != 0),
 886                                   (GLboolean) (color->ColorMask[i][2] != 0),
 887                                   (GLboolean) (color->ColorMask[i][3] != 0));
 888                   }
 889                }
 890                {
 891                   /* Need to determine if more than one color output is
 892                    * specified.  If so, call glDrawBuffersARB, else call
 893                    * glDrawBuffer().  This is a subtle, but essential point
 894                    * since GL_FRONT (for example) is illegal for the former
 895                    * function, but legal for the later.
 896                    */
 897                   GLboolean multipleBuffers = GL_FALSE;
 898                   GLuint i;
 899
 900                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 901                      if (color->DrawBuffer[i] != GL_NONE) {
 902                         multipleBuffers = GL_TRUE;
 903                         break;
 904                      }
 905                   }
 906                   /* Call the API_level functions, not _mesa_drawbuffers()
 907                    * since we need to do error checking on the pop'd
 908                    * GL_DRAW_BUFFER.
 909                    * Ex: if GL_FRONT were pushed, but we're popping with a
 910                    * user FBO bound, GL_FRONT will be illegal and we'll need
 911                    * to record that error.  Per OpenGL ARB decision.
 912                    */
 913                   if (multipleBuffers)
 914                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 915                                           color->DrawBuffer);
 916                   else
 917                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 918                }
 919                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 920                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 921                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 922                   if (ctx->Extensions.EXT_draw_buffers2) {
 923                      GLuint i;
 924                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 925                         _mesa_set_enablei(ctx, GL_BLEND, i,
 926                                           (color->BlendEnabled >> i) & 1);
 927                      }
 928                   }
 929                   else {
 930                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 931                   }
 932                }
 933                if (ctx->Color._BlendFuncPerBuffer ||
 934                    ctx->Color._BlendEquationPerBuffer) {
 935                   /* set blend per buffer */
 936                   GLuint buf;
 937                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
 938                      _mesa_BlendFuncSeparatei(buf, color->Blend[buf].SrcRGB,
 939                                               color->Blend[buf].DstRGB,
 940                                               color->Blend[buf].SrcA,
 941                                               color->Blend[buf].DstA);
 942                      _mesa_BlendEquationSeparatei(buf,
 943                                                   color->Blend[buf].EquationRGB,
 944                                                   color->Blend[buf].EquationA);
 945                   }
 946                }
 947                else {
 948                   /* set same blend modes for all buffers */
 949                   _mesa_BlendFuncSeparateEXT(color->Blend[0].SrcRGB,
 950                                              color->Blend[0].DstRGB,
 951                                              color->Blend[0].SrcA,
 952                                              color->Blend[0].DstA);
 953                   /* This special case is because glBlendEquationSeparateEXT
 954                    * cannot take GL_LOGIC_OP as a parameter.
 955                    */
 956                   if (color->Blend[0].EquationRGB ==
 957                       color->Blend[0].EquationA) {
 958                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
 959                   }
 960                   else {
 961                      _mesa_BlendEquationSeparateEXT(
 962                                                  color->Blend[0].EquationRGB,
 963                                                  color->Blend[0].EquationA);
 964                   }
 965                }
 966                _mesa_BlendColor(color->BlendColorUnclamped[0],
 967                                 color->BlendColorUnclamped[1],
 968                                 color->BlendColorUnclamped[2],
 969                                 color->BlendColorUnclamped[3]);
 970                _mesa_LogicOp(color->LogicOp);
 971                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 972                                 color->ColorLogicOpEnabled);
 973                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 974                                 color->IndexLogicOpEnabled);
 975                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 976                _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, color->ClampFragmentColor);
 977                _mesa_ClampColorARB(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 978             }
 979             break;
 980          case GL_CURRENT_BIT:
 981             FLUSH_CURRENT( ctx, 0 );
 982             memcpy( &ctx->Current, attr->data,
 983                     sizeof(struct gl_current_attrib) );
 984             break;
 985          case GL_DEPTH_BUFFER_BIT:
 986             {
 987                const struct gl_depthbuffer_attrib *depth;
 988                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 989                _mesa_DepthFunc(depth->Func);
 990                _mesa_ClearDepth(depth->Clear);
 991                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 992                _mesa_DepthMask(depth->Mask);
 993             }
 994             break;
 995          case GL_ENABLE_BIT:
 996             {
 997                const struct gl_enable_attrib *enable;
 998                enable = (const struct gl_enable_attrib *) attr->data;
 999                pop_enable_group(ctx, enable);
1000                ctx->NewState |= _NEW_ALL;
1001             }
1002             break;
1003          case GL_EVAL_BIT:
1004             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
1005             ctx->NewState |= _NEW_EVAL;
1006             break;
1007          case GL_FOG_BIT:
1008             {
1009                const struct gl_fog_attrib *fog;
1010                fog = (const struct gl_fog_attrib *) attr->data;
1011                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1012                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1013                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1014                _mesa_Fogf(GL_FOG_START, fog->Start);
1015                _mesa_Fogf(GL_FOG_END, fog->End);
1016                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1017                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1018             }
1019             break;
1020          case GL_HINT_BIT:
1021             {
1022                const struct gl_hint_attrib *hint;
1023                hint = (const struct gl_hint_attrib *) attr->data;
1024                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1025                           hint->PerspectiveCorrection );
1026                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1027                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1028                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1029                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1030                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1031                           hint->ClipVolumeClipping);
1032                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1033                           hint->TextureCompression);
1034             }
1035             break;
1036          case GL_LIGHTING_BIT:
1037             {
1038                GLuint i;
1039                const struct gl_light_attrib *light;
1040                light = (const struct gl_light_attrib *) attr->data;
1041                /* lighting enable */
1042                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1043                /* per-light state */
1044                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1045                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1046
1047                for (i = 0; i < ctx->Const.MaxLights; i++) {
1048                   const struct gl_light *l = &light->Light[i];
1049                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1050                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1051                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1052                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1053                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1054                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1055                   {
1056                      GLfloat p[4] = { 0 };
1057                      p[0] = l->SpotExponent;
1058                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1059                   }
1060                   {
1061                      GLfloat p[4] = { 0 };
1062                      p[0] = l->SpotCutoff;
1063                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1064                   }
1065                   {
1066                      GLfloat p[4] = { 0 };
1067                      p[0] = l->ConstantAttenuation;
1068                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1069                   }
1070                   {
1071                      GLfloat p[4] = { 0 };
1072                      p[0] = l->LinearAttenuation;
1073                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1074                   }
1075                   {
1076                      GLfloat p[4] = { 0 };
1077                      p[0] = l->QuadraticAttenuation;
1078                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1079                   }
1080                }
1081                /* light model */
1082                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1083                                   light->Model.Ambient);
1084                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1085                                  (GLfloat) light->Model.LocalViewer);
1086                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1087                                  (GLfloat) light->Model.TwoSide);
1088                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1089                                  (GLfloat) light->Model.ColorControl);
1090                /* shade model */
1091                _mesa_ShadeModel(light->ShadeModel);
1092                /* color material */
1093                _mesa_ColorMaterial(light->ColorMaterialFace,
1094                                    light->ColorMaterialMode);
1095                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1096                                 light->ColorMaterialEnabled);
1097                /* materials */
1098                memcpy(&ctx->Light.Material, &light->Material,
1099                       sizeof(struct gl_material));
1100                _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, light->ClampVertexColor);
1101             }
1102             break;
1103          case GL_LINE_BIT:
1104             {
1105                const struct gl_line_attrib *line;
1106                line = (const struct gl_line_attrib *) attr->data;
1107                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1108                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1109                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1110                _mesa_LineWidth(line->Width);
1111             }
1112             break;
1113          case GL_LIST_BIT:
1114             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1115             break;
1116          case GL_PIXEL_MODE_BIT:
1117             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1118             /* XXX what other pixel state needs to be set by function calls? */
1119             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1120             ctx->NewState |= _NEW_PIXEL;
1121             break;
1122          case GL_POINT_BIT:
1123             {
1124                const struct gl_point_attrib *point;
1125                point = (const struct gl_point_attrib *) attr->data;
1126                _mesa_PointSize(point->Size);
1127                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1128                if (ctx->Extensions.EXT_point_parameters) {
1129                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1130                                          point->Params);
1131                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1132                                         point->MinSize);
1133                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1134                                         point->MaxSize);
1135                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1136                                         point->Threshold);
1137                }
1138                if (ctx->Extensions.NV_point_sprite
1139                    || ctx->Extensions.ARB_point_sprite) {
1140                   GLuint u;
1141                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1142                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1143                                    (GLint) point->CoordReplace[u]);
1144                   }
1145                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1146                   if (ctx->Extensions.NV_point_sprite)
1147                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1148                                            ctx->Point.SpriteRMode);
1149                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1150                                         (GLfloat)ctx->Point.SpriteOrigin);
1151                }
1152             }
1153             break;
1154          case GL_POLYGON_BIT:
1155             {
1156                const struct gl_polygon_attrib *polygon;
1157                polygon = (const struct gl_polygon_attrib *) attr->data;
1158                _mesa_CullFace(polygon->CullFaceMode);
1159                _mesa_FrontFace(polygon->FrontFace);
1160                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1161                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1162                _mesa_PolygonOffset(polygon->OffsetFactor,
1163                                    polygon->OffsetUnits);
1164                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1165                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1166                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1167                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1168                                 polygon->OffsetPoint);
1169                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1170                                 polygon->OffsetLine);
1171                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1172                                 polygon->OffsetFill);
1173             }
1174             break;
1175          case GL_POLYGON_STIPPLE_BIT:
1176             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1177             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1178             if (ctx->Driver.PolygonStipple)
1179                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1180             break;
1181          case GL_SCISSOR_BIT:
1182             {
1183                const struct gl_scissor_attrib *scissor;
1184                scissor = (const struct gl_scissor_attrib *) attr->data;
1185                _mesa_Scissor(scissor->X, scissor->Y,
1186                              scissor->Width, scissor->Height);
1187                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1188             }
1189             break;
1190          case GL_STENCIL_BUFFER_BIT:
1191             {
1192                const struct gl_stencil_attrib *stencil;
1193                stencil = (const struct gl_stencil_attrib *) attr->data;
1194                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1195                _mesa_ClearStencil(stencil->Clear);
1196                if (ctx->Extensions.EXT_stencil_two_side) {
1197                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1198                                    stencil->TestTwoSide);
1199                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1200                                              ? GL_BACK : GL_FRONT);
1201                }
1202                /* front state */
1203                _mesa_StencilFuncSeparate(GL_FRONT,
1204                                          stencil->Function[0],
1205                                          stencil->Ref[0],
1206                                          stencil->ValueMask[0]);
1207                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1208                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1209                                        stencil->ZFailFunc[0],
1210                                        stencil->ZPassFunc[0]);
1211                /* back state */
1212                _mesa_StencilFuncSeparate(GL_BACK,
1213                                          stencil->Function[1],
1214                                          stencil->Ref[1],
1215                                          stencil->ValueMask[1]);
1216                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1217                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1218                                        stencil->ZFailFunc[1],
1219                                        stencil->ZPassFunc[1]);
1220             }
1221             break;
1222          case GL_TRANSFORM_BIT:
1223             {
1224                GLuint i;
1225                const struct gl_transform_attrib *xform;
1226                xform = (const struct gl_transform_attrib *) attr->data;
1227                _mesa_MatrixMode(xform->MatrixMode);
1228                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1229                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1230
1231                /* restore clip planes */
1232                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1233                   const GLuint mask = 1 << i;
1234                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1235                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1236                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1237                                    !!(xform->ClipPlanesEnabled & mask));
1238                   if (ctx->Driver.ClipPlane)
1239                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1240                }
1241
1242                /* normalize/rescale */
1243                if (xform->Normalize != ctx->Transform.Normalize)
1244                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1245                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1246                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1247                                    ctx->Transform.RescaleNormals);
1248                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1249                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1250                                    ctx->Transform.DepthClamp);
1251             }
1252             break;
1253          case GL_TEXTURE_BIT:
1254             {
1255                struct texture_state *texstate
1256                   = (struct texture_state *) attr->data;
1257                pop_texture_group(ctx, texstate);
1258                ctx->NewState |= _NEW_TEXTURE;
1259             }
1260             break;
1261          case GL_VIEWPORT_BIT:
1262             {
1263                const struct gl_viewport_attrib *vp;
1264                vp = (const struct gl_viewport_attrib *) attr->data;
1265                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1266                _mesa_DepthRange(vp->Near, vp->Far);
1267             }
1268             break;
1269          case GL_MULTISAMPLE_BIT_ARB:
1270             {
1271                const struct gl_multisample_attrib *ms;
1272                ms = (const struct gl_multisample_attrib *) attr->data;
1273                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1274                                        ms->SampleCoverageInvert);
1275             }
1276             break;
1277
1278          default:
1279             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1280             break;
1281       }
1282
1283       next = attr->next;
1284       FREE( attr->data );
1285       FREE( attr );
1286       attr = next;
1287    }
1288 }
1289
1290
1291 /**
1292  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1293  * object refcounts.
1294  */
1295 static void
1296 copy_pixelstore(struct gl_context *ctx,
1297                 struct gl_pixelstore_attrib *dst,
1298                 const struct gl_pixelstore_attrib *src)
1299 {
1300    dst->Alignment = src->Alignment;
1301    dst->RowLength = src->RowLength;
1302    dst->SkipPixels = src->SkipPixels;
1303    dst->SkipRows = src->SkipRows;
1304    dst->ImageHeight = src->ImageHeight;
1305    dst->SkipImages = src->SkipImages;
1306    dst->SwapBytes = src->SwapBytes;
1307    dst->LsbFirst = src->LsbFirst;
1308    dst->Invert = src->Invert;
1309    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1310 }
1311
1312
1313 #define GL_CLIENT_PACK_BIT (1<<20)
1314 #define GL_CLIENT_UNPACK_BIT (1<<21)
1315
1316 /**
1317  * Copy gl_array_object from src to dest.
1318  * 'dest' must be in an initialized state.
1319  */
1320 static void
1321 copy_array_object(struct gl_context *ctx,
1322                   struct gl_array_object *dest,
1323                   struct gl_array_object *src)
1324 {
1325    GLuint i;
1326
1327    /* skip Name */
1328    /* skip RefCount */
1329
1330    /* In theory must be the same anyway, but on recreate make sure it matches */
1331    dest->ARBsemantics = src->ARBsemantics;
1332
1333    for (i = 0; i < Elements(src->VertexAttrib); i++)
1334       _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1335
1336    /* _Enabled must be the same than on push */
1337    dest->_Enabled = src->_Enabled;
1338    dest->_MaxElement = src->_MaxElement;
1339 }
1340
1341 /**
1342  * Copy gl_array_attrib from src to dest.
1343  * 'dest' must be in an initialized state.
1344  */
1345 static void
1346 copy_array_attrib(struct gl_context *ctx,
1347                   struct gl_array_attrib *dest,
1348                   struct gl_array_attrib *src,
1349                   bool vbo_deleted)
1350 {
1351    /* skip ArrayObj */
1352    /* skip DefaultArrayObj, Objects */
1353    dest->ActiveTexture = src->ActiveTexture;
1354    dest->LockFirst = src->LockFirst;
1355    dest->LockCount = src->LockCount;
1356    dest->PrimitiveRestart = src->PrimitiveRestart;
1357    dest->RestartIndex = src->RestartIndex;
1358    /* skip NewState */
1359    /* skip RebindArrays */
1360
1361    if (!vbo_deleted)
1362       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1363
1364    /* skip ArrayBufferObj */
1365    /* skip ElementArrayBufferObj */
1366 }
1367
1368 /**
1369  * Save the content of src to dest.
1370  */
1371 static void
1372 save_array_attrib(struct gl_context *ctx,
1373                   struct gl_array_attrib *dest,
1374                   struct gl_array_attrib *src)
1375 {
1376    /* Set the Name, needed for restore, but do never overwrite.
1377     * Needs to match value in the object hash. */
1378    dest->ArrayObj->Name = src->ArrayObj->Name;
1379    /* And copy all of the rest. */
1380    copy_array_attrib(ctx, dest, src, false);
1381
1382    /* Just reference them here */
1383    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1384                                  src->ArrayBufferObj);
1385    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1386                                  src->ArrayObj->ElementArrayBufferObj);
1387 }
1388
1389 /**
1390  * Restore the content of src to dest.
1391  */
1392 static void
1393 restore_array_attrib(struct gl_context *ctx,
1394                      struct gl_array_attrib *dest,
1395                      struct gl_array_attrib *src)
1396 {
1397    /* The ARB_vertex_array_object spec says:
1398     *
1399     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1400     *     if array is not a name returned from a previous call to
1401     *     GenVertexArrays, or if such a name has since been deleted with
1402     *     DeleteVertexArrays."
1403     *
1404     * Therefore popping a deleted VAO cannot magically recreate it.
1405     *
1406     * The semantics of objects created using APPLE_vertex_array_objects behave
1407     * differently.  These objects expect to be recreated by pop.  Alas.
1408     */
1409    const bool arb_vao = (src->ArrayObj->Name != 0
1410                          && src->ArrayObj->ARBsemantics);
1411
1412    if (arb_vao && !_mesa_IsVertexArrayAPPLE(src->ArrayObj->Name))
1413       return;
1414
1415    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1416
1417    /* Restore or recreate the buffer objects by the names ... */
1418    if (!arb_vao
1419        || src->ArrayBufferObj->Name == 0
1420        || _mesa_IsBufferARB(src->ArrayBufferObj->Name)) {
1421       /* ... and restore its content */
1422       copy_array_attrib(ctx, dest, src, false);
1423
1424       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1425                           src->ArrayBufferObj->Name);
1426    } else {
1427       copy_array_attrib(ctx, dest, src, true);
1428    }
1429
1430    if (!arb_vao
1431        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1432        || _mesa_IsBufferARB(src->ArrayObj->ElementArrayBufferObj->Name))
1433       _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1434                           src->ArrayObj->ElementArrayBufferObj->Name);
1435
1436    /* Better safe than sorry?! */
1437    dest->RebindArrays = GL_TRUE;
1438
1439    /* FIXME: Should some bits in ctx->Array->NewState also be set
1440     * FIXME: here?  It seems like it should be set to inclusive-or
1441     * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1442     * ... just do it.
1443     */
1444    dest->NewState |= src->ArrayObj->_Enabled | dest->ArrayObj->_Enabled;
1445 }
1446
1447 /**
1448  * init/alloc the fields of 'attrib'.
1449  * Needs to the init part matching free_array_attrib_data below.
1450  */
1451 static void
1452 init_array_attrib_data(struct gl_context *ctx,
1453                        struct gl_array_attrib *attrib)
1454 {
1455    /* Get a non driver gl_array_object. */
1456    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1457    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1458 }
1459
1460 /**
1461  * Free/unreference the fields of 'attrib' but don't delete it (that's
1462  * done later in the calling code).
1463  * Needs to the cleanup part matching init_array_attrib_data above.
1464  */
1465 static void
1466 free_array_attrib_data(struct gl_context *ctx,
1467                        struct gl_array_attrib *attrib)
1468 {
1469    /* We use a non driver array object, so don't just unref since we would
1470     * end up using the drivers DeleteArrayObject function for deletion. */
1471    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1472    attrib->ArrayObj = 0;
1473    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1474 }
1475
1476
1477 void GLAPIENTRY
1478 _mesa_PushClientAttrib(GLbitfield mask)
1479 {
1480    struct gl_attrib_node *head;
1481
1482    GET_CURRENT_CONTEXT(ctx);
1483    ASSERT_OUTSIDE_BEGIN_END(ctx);
1484
1485    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1486       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1487       return;
1488    }
1489
1490    /* Build linked list of attribute nodes which save all attribute
1491     * groups specified by the mask.
1492     */
1493    head = NULL;
1494
1495    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1496       struct gl_pixelstore_attrib *attr;
1497       /* packing attribs */
1498       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1499       copy_pixelstore(ctx, attr, &ctx->Pack);
1500       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1501       /* unpacking attribs */
1502       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1503       copy_pixelstore(ctx, attr, &ctx->Unpack);
1504       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1505    }
1506
1507    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1508       struct gl_array_attrib *attr;
1509       attr = CALLOC_STRUCT( gl_array_attrib );
1510       init_array_attrib_data(ctx, attr);
1511       save_array_attrib(ctx, attr, &ctx->Array);
1512       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1513    }
1514
1515    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1516    ctx->ClientAttribStackDepth++;
1517 }
1518
1519
1520
1521
1522 void GLAPIENTRY
1523 _mesa_PopClientAttrib(void)
1524 {
1525    struct gl_attrib_node *node, *next;
1526
1527    GET_CURRENT_CONTEXT(ctx);
1528    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1529
1530    if (ctx->ClientAttribStackDepth == 0) {
1531       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1532       return;
1533    }
1534
1535    ctx->ClientAttribStackDepth--;
1536    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1537
1538    while (node) {
1539       switch (node->kind) {
1540          case GL_CLIENT_PACK_BIT:
1541             {
1542                struct gl_pixelstore_attrib *store =
1543                   (struct gl_pixelstore_attrib *) node->data;
1544                copy_pixelstore(ctx, &ctx->Pack, store);
1545                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1546             }
1547             ctx->NewState |= _NEW_PACKUNPACK;
1548             break;
1549          case GL_CLIENT_UNPACK_BIT:
1550             {
1551                struct gl_pixelstore_attrib *store =
1552                   (struct gl_pixelstore_attrib *) node->data;
1553                copy_pixelstore(ctx, &ctx->Unpack, store);
1554                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1555             }
1556             ctx->NewState |= _NEW_PACKUNPACK;
1557             break;
1558          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1559             struct gl_array_attrib * attr =
1560               (struct gl_array_attrib *) node->data;
1561             restore_array_attrib(ctx, &ctx->Array, attr);
1562             free_array_attrib_data(ctx, attr);
1563             ctx->NewState |= _NEW_ARRAY;
1564             break;
1565          }
1566          default:
1567             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1568             break;
1569       }
1570
1571       next = node->next;
1572       FREE( node->data );
1573       FREE( node );
1574       node = next;
1575    }
1576 }
1577
1578
1579 void
1580 _mesa_init_attrib_dispatch(struct _glapi_table *disp)
1581 {
1582    SET_PopAttrib(disp, _mesa_PopAttrib);
1583    SET_PushAttrib(disp, _mesa_PushAttrib);
1584    SET_PopClientAttrib(disp, _mesa_PopClientAttrib);
1585    SET_PushClientAttrib(disp, _mesa_PushClientAttrib);
1586 }
1587
1588
1589 #endif /* FEATURE_attrib_stack */
1590
1591
1592 /**
1593  * Free any attribute state data that might be attached to the context.
1594  */
1595 void
1596 _mesa_free_attrib_data(struct gl_context *ctx)
1597 {
1598    while (ctx->AttribStackDepth > 0) {
1599       struct gl_attrib_node *attr, *next;
1600
1601       ctx->AttribStackDepth--;
1602       attr = ctx->AttribStack[ctx->AttribStackDepth];
1603
1604       while (attr) {
1605          if (attr->kind == GL_TEXTURE_BIT) {
1606             struct texture_state *texstate = (struct texture_state*)attr->data;
1607             GLuint u, tgt;
1608             /* clear references to the saved texture objects */
1609             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1610                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1611                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1612                }
1613             }
1614             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1615          }
1616          else {
1617             /* any other chunks of state that requires special handling? */
1618          }
1619
1620          next = attr->next;
1621          free(attr->data);
1622          free(attr);
1623          attr = next;
1624       }
1625    }
1626 }
1627
1628
1629 void _mesa_init_attrib( struct gl_context *ctx )
1630 {
1631    /* Renderer and client attribute stacks */
1632    ctx->AttribStackDepth = 0;
1633    ctx->ClientAttribStackDepth = 0;
1634 }