src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "glheader.h"
  27 #include "imports.h"
  28 #include "accum.h"
  29 #include "arrayobj.h"
  30 #include "attrib.h"
  31 #include "blend.h"
  32 #include "buffers.h"
  33 #include "bufferobj.h"
  34 #include "clear.h"
  35 #include "colormac.h"
  36 #include "context.h"
  37 #include "depth.h"
  38 #include "enable.h"
  39 #include "enums.h"
  40 #include "fog.h"
  41 #include "hint.h"
  42 #include "light.h"
  43 #include "lines.h"
  44 #include "macros.h"
  45 #include "matrix.h"
  46 #include "mfeatures.h"
  47 #include "multisample.h"
  48 #include "points.h"
  49 #include "polygon.h"
  50 #include "shared.h"
  51 #include "scissor.h"
  52 #include "stencil.h"
  53 #include "texenv.h"
  54 #include "texgen.h"
  55 #include "texobj.h"
  56 #include "texparam.h"
  57 #include "texstate.h"
  58 #include "varray.h"
  59 #include "viewport.h"
  60 #include "mtypes.h"
  61 #include "main/dispatch.h"
  62 #include "hash.h"
  63 #include <stdbool.h>
  64
  65
  66 /**
  67  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  68  */
  69 struct gl_enable_attrib
  70 {
  71    GLboolean AlphaTest;
  72    GLboolean AutoNormal;
  73    GLboolean Blend;
  74    GLbitfield ClipPlanes;
  75    GLboolean ColorMaterial;
  76    GLboolean CullFace;
  77    GLboolean DepthClamp;
  78    GLboolean DepthTest;
  79    GLboolean Dither;
  80    GLboolean Fog;
  81    GLboolean Light[MAX_LIGHTS];
  82    GLboolean Lighting;
  83    GLboolean LineSmooth;
  84    GLboolean LineStipple;
  85    GLboolean IndexLogicOp;
  86    GLboolean ColorLogicOp;
  87
  88    GLboolean Map1Color4;
  89    GLboolean Map1Index;
  90    GLboolean Map1Normal;
  91    GLboolean Map1TextureCoord1;
  92    GLboolean Map1TextureCoord2;
  93    GLboolean Map1TextureCoord3;
  94    GLboolean Map1TextureCoord4;
  95    GLboolean Map1Vertex3;
  96    GLboolean Map1Vertex4;
  97    GLboolean Map2Color4;
  98    GLboolean Map2Index;
  99    GLboolean Map2Normal;
 100    GLboolean Map2TextureCoord1;
 101    GLboolean Map2TextureCoord2;
 102    GLboolean Map2TextureCoord3;
 103    GLboolean Map2TextureCoord4;
 104    GLboolean Map2Vertex3;
 105    GLboolean Map2Vertex4;
 106
 107    GLboolean Normalize;
 108    GLboolean PixelTexture;
 109    GLboolean PointSmooth;
 110    GLboolean PolygonOffsetPoint;
 111    GLboolean PolygonOffsetLine;
 112    GLboolean PolygonOffsetFill;
 113    GLboolean PolygonSmooth;
 114    GLboolean PolygonStipple;
 115    GLboolean RescaleNormals;
 116    GLboolean Scissor;
 117    GLboolean Stencil;
 118    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 119    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 120    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 121    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 122    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 123    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 124
 125    GLbitfield Texture[MAX_TEXTURE_UNITS];
 126    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 127
 128    /* GL_ARB_vertex_program */
 129    GLboolean VertexProgram;
 130    GLboolean VertexProgramPointSize;
 131    GLboolean VertexProgramTwoSide;
 132
 133    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 134    GLboolean PointSprite;
 135    GLboolean FragmentShaderATI;
 136
 137    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 138    GLboolean sRGBEnabled;
 139 };
 140
 141
 142 /**
 143  * Node for the attribute stack.
 144  */
 145 struct gl_attrib_node
 146 {
 147    GLbitfield kind;
 148    void *data;
 149    struct gl_attrib_node *next;
 150 };
 151
 152
 153
 154 /**
 155  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 156  */
 157 struct texture_state
 158 {
 159    struct gl_texture_attrib Texture;  /**< The usual context state */
 160
 161    /** to save per texture object state (wrap modes, filters, etc): */
 162    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 163
 164    /**
 165     * To save references to texture objects (so they don't get accidentally
 166     * deleted while saved in the attribute stack).
 167     */
 168    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 169
 170    /* We need to keep a reference to the shared state.  That's where the
 171     * default texture objects are kept.  We don't want that state to be
 172     * freed while the attribute stack contains pointers to any default
 173     * texture objects.
 174     */
 175    struct gl_shared_state *SharedRef;
 176 };
 177
 178
 179 /**
 180  * Allocate new attribute node of given type/kind.  Attach payload data.
 181  * Insert it into the linked list named by 'head'.
 182  */
 183 static void
 184 save_attrib_data(struct gl_attrib_node **head,
 185                  GLbitfield kind, void *payload)
 186 {
 187    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 188    if (n) {
 189       n->kind = kind;
 190       n->data = payload;
 191       /* insert at head */
 192       n->next = *head;
 193       *head = n;
 194    }
 195    else {
 196       /* out of memory! */
 197    }
 198 }
 199
 200
 201 void GLAPIENTRY
 202 _mesa_PushAttrib(GLbitfield mask)
 203 {
 204    struct gl_attrib_node *head;
 205
 206    GET_CURRENT_CONTEXT(ctx);
 207    ASSERT_OUTSIDE_BEGIN_END(ctx);
 208
 209    if (MESA_VERBOSE & VERBOSE_API)
 210       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 211
 212    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 213       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 214       return;
 215    }
 216
 217    /* Build linked list of attribute nodes which save all attribute */
 218    /* groups specified by the mask. */
 219    head = NULL;
 220
 221    if (mask & GL_ACCUM_BUFFER_BIT) {
 222       struct gl_accum_attrib *attr;
 223       attr = MALLOC_STRUCT( gl_accum_attrib );
 224       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 225       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 226    }
 227
 228    if (mask & GL_COLOR_BUFFER_BIT) {
 229       GLuint i;
 230       struct gl_colorbuffer_attrib *attr;
 231       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 232       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 233       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 234       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 235          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 236       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 237    }
 238
 239    if (mask & GL_CURRENT_BIT) {
 240       struct gl_current_attrib *attr;
 241       FLUSH_CURRENT( ctx, 0 );
 242       attr = MALLOC_STRUCT( gl_current_attrib );
 243       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 244       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 245    }
 246
 247    if (mask & GL_DEPTH_BUFFER_BIT) {
 248       struct gl_depthbuffer_attrib *attr;
 249       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 250       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 251       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 252    }
 253
 254    if (mask & GL_ENABLE_BIT) {
 255       struct gl_enable_attrib *attr;
 256       GLuint i;
 257       attr = MALLOC_STRUCT( gl_enable_attrib );
 258       /* Copy enable flags from all other attributes into the enable struct. */
 259       attr->AlphaTest = ctx->Color.AlphaEnabled;
 260       attr->AutoNormal = ctx->Eval.AutoNormal;
 261       attr->Blend = ctx->Color.BlendEnabled;
 262       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 263       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 264       attr->CullFace = ctx->Polygon.CullFlag;
 265       attr->DepthClamp = ctx->Transform.DepthClamp;
 266       attr->DepthTest = ctx->Depth.Test;
 267       attr->Dither = ctx->Color.DitherFlag;
 268       attr->Fog = ctx->Fog.Enabled;
 269       for (i = 0; i < ctx->Const.MaxLights; i++) {
 270          attr->Light[i] = ctx->Light.Light[i].Enabled;
 271       }
 272       attr->Lighting = ctx->Light.Enabled;
 273       attr->LineSmooth = ctx->Line.SmoothFlag;
 274       attr->LineStipple = ctx->Line.StippleFlag;
 275       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 276       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 277       attr->Map1Color4 = ctx->Eval.Map1Color4;
 278       attr->Map1Index = ctx->Eval.Map1Index;
 279       attr->Map1Normal = ctx->Eval.Map1Normal;
 280       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 281       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 282       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 283       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 284       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 285       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 286       attr->Map2Color4 = ctx->Eval.Map2Color4;
 287       attr->Map2Index = ctx->Eval.Map2Index;
 288       attr->Map2Normal = ctx->Eval.Map2Normal;
 289       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 290       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 291       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 292       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 293       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 294       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 295       attr->Normalize = ctx->Transform.Normalize;
 296       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 297       attr->PointSmooth = ctx->Point.SmoothFlag;
 298       attr->PointSprite = ctx->Point.PointSprite;
 299       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 300       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 301       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 302       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 303       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 304       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 305       attr->Scissor = ctx->Scissor.Enabled;
 306       attr->Stencil = ctx->Stencil.Enabled;
 307       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 308       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 309       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 310       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 311       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 312       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 313          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 314          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 315       }
 316       /* GL_ARB_vertex_program */
 317       attr->VertexProgram = ctx->VertexProgram.Enabled;
 318       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 319       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 320       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 321
 322       /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 323       attr->sRGBEnabled = ctx->Color.sRGBEnabled;
 324    }
 325
 326    if (mask & GL_EVAL_BIT) {
 327       struct gl_eval_attrib *attr;
 328       attr = MALLOC_STRUCT( gl_eval_attrib );
 329       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 330       save_attrib_data(&head, GL_EVAL_BIT, attr);
 331    }
 332
 333    if (mask & GL_FOG_BIT) {
 334       struct gl_fog_attrib *attr;
 335       attr = MALLOC_STRUCT( gl_fog_attrib );
 336       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 337       save_attrib_data(&head, GL_FOG_BIT, attr);
 338    }
 339
 340    if (mask & GL_HINT_BIT) {
 341       struct gl_hint_attrib *attr;
 342       attr = MALLOC_STRUCT( gl_hint_attrib );
 343       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 344       save_attrib_data(&head, GL_HINT_BIT, attr);
 345    }
 346
 347    if (mask & GL_LIGHTING_BIT) {
 348       struct gl_light_attrib *attr;
 349       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 350       attr = MALLOC_STRUCT( gl_light_attrib );
 351       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 352       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 353    }
 354
 355    if (mask & GL_LINE_BIT) {
 356       struct gl_line_attrib *attr;
 357       attr = MALLOC_STRUCT( gl_line_attrib );
 358       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 359       save_attrib_data(&head, GL_LINE_BIT, attr);
 360    }
 361
 362    if (mask & GL_LIST_BIT) {
 363       struct gl_list_attrib *attr;
 364       attr = MALLOC_STRUCT( gl_list_attrib );
 365       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 366       save_attrib_data(&head, GL_LIST_BIT, attr);
 367    }
 368
 369    if (mask & GL_PIXEL_MODE_BIT) {
 370       struct gl_pixel_attrib *attr;
 371       attr = MALLOC_STRUCT( gl_pixel_attrib );
 372       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 373       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 374       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 375       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 376    }
 377
 378    if (mask & GL_POINT_BIT) {
 379       struct gl_point_attrib *attr;
 380       attr = MALLOC_STRUCT( gl_point_attrib );
 381       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 382       save_attrib_data(&head, GL_POINT_BIT, attr);
 383    }
 384
 385    if (mask & GL_POLYGON_BIT) {
 386       struct gl_polygon_attrib *attr;
 387       attr = MALLOC_STRUCT( gl_polygon_attrib );
 388       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 389       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 390    }
 391
 392    if (mask & GL_POLYGON_STIPPLE_BIT) {
 393       GLuint *stipple;
 394       stipple = malloc( 32*sizeof(GLuint) );
 395       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 396       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 397    }
 398
 399    if (mask & GL_SCISSOR_BIT) {
 400       struct gl_scissor_attrib *attr;
 401       attr = MALLOC_STRUCT( gl_scissor_attrib );
 402       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 403       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 404    }
 405
 406    if (mask & GL_STENCIL_BUFFER_BIT) {
 407       struct gl_stencil_attrib *attr;
 408       attr = MALLOC_STRUCT( gl_stencil_attrib );
 409       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 410       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 411    }
 412
 413    if (mask & GL_TEXTURE_BIT) {
 414       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 415       GLuint u, tex;
 416
 417       if (!texstate) {
 418          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 419          goto end;
 420       }
 421
 422       _mesa_lock_context_textures(ctx);
 423
 424       /* copy/save the bulk of texture state here */
 425       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 426
 427       /* Save references to the currently bound texture objects so they don't
 428        * accidentally get deleted while referenced in the attribute stack.
 429        */
 430       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 431          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 432             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 433                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 434          }
 435       }
 436
 437       /* copy state/contents of the currently bound texture objects */
 438       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 439          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 440             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 441                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 442          }
 443       }
 444
 445       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 446
 447       _mesa_unlock_context_textures(ctx);
 448
 449       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 450    }
 451
 452    if (mask & GL_TRANSFORM_BIT) {
 453       struct gl_transform_attrib *attr;
 454       attr = MALLOC_STRUCT( gl_transform_attrib );
 455       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 456       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 457    }
 458
 459    if (mask & GL_VIEWPORT_BIT) {
 460       struct gl_viewport_attrib *attr;
 461       attr = MALLOC_STRUCT( gl_viewport_attrib );
 462       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 463       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 464    }
 465
 466    /* GL_ARB_multisample */
 467    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 468       struct gl_multisample_attrib *attr;
 469       attr = MALLOC_STRUCT( gl_multisample_attrib );
 470       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 471       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 472    }
 473
 474 end:
 475    ctx->AttribStack[ctx->AttribStackDepth] = head;
 476    ctx->AttribStackDepth++;
 477 }
 478
 479
 480
 481 static void
 482 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 483 {
 484    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 485    GLuint i;
 486
 487 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 488         if ((VALUE) != (NEWVALUE)) {                    \
 489            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 490         }
 491
 492    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 493    if (ctx->Color.BlendEnabled != enable->Blend) {
 494       if (ctx->Extensions.EXT_draw_buffers2) {
 495          GLuint i;
 496          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 497             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 498          }
 499       }
 500       else {
 501          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 502       }
 503    }
 504
 505    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 506       const GLuint mask = 1 << i;
 507       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 508           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 509                            !!(enable->ClipPlanes & mask));
 510    }
 511
 512    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 513                    GL_COLOR_MATERIAL);
 514    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 515    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 516                    GL_DEPTH_CLAMP);
 517    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 518    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 519    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 520    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 521    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 522    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 523                    GL_LINE_STIPPLE);
 524    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 525                    GL_INDEX_LOGIC_OP);
 526    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 527                    GL_COLOR_LOGIC_OP);
 528
 529    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 530    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 531    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 532    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 533                    GL_MAP1_TEXTURE_COORD_1);
 534    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 535                    GL_MAP1_TEXTURE_COORD_2);
 536    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 537                    GL_MAP1_TEXTURE_COORD_3);
 538    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 539                    GL_MAP1_TEXTURE_COORD_4);
 540    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 541                    GL_MAP1_VERTEX_3);
 542    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 543                    GL_MAP1_VERTEX_4);
 544
 545    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 546    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 547    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 548    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 549                    GL_MAP2_TEXTURE_COORD_1);
 550    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 551                    GL_MAP2_TEXTURE_COORD_2);
 552    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 553                    GL_MAP2_TEXTURE_COORD_3);
 554    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 555                    GL_MAP2_TEXTURE_COORD_4);
 556    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 557                    GL_MAP2_VERTEX_3);
 558    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 559                    GL_MAP2_VERTEX_4);
 560
 561    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 562    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 563    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 564                    GL_RESCALE_NORMAL_EXT);
 565    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 566                    enable->RasterPositionUnclipped,
 567                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 568    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 569                    GL_POINT_SMOOTH);
 570    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 571       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 572                       GL_POINT_SPRITE_NV);
 573    }
 574    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 575                    GL_POLYGON_OFFSET_POINT);
 576    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 577                    GL_POLYGON_OFFSET_LINE);
 578    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 579                    GL_POLYGON_OFFSET_FILL);
 580    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 581                    GL_POLYGON_SMOOTH);
 582    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 583                    GL_POLYGON_STIPPLE);
 584    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 585    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 586    if (ctx->Extensions.EXT_stencil_two_side) {
 587       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 588    }
 589    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 590                    GL_MULTISAMPLE_ARB);
 591    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 592                    enable->SampleAlphaToCoverage,
 593                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 594    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 595                    enable->SampleAlphaToOne,
 596                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 597    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 598                    enable->SampleCoverage,
 599                    GL_SAMPLE_COVERAGE_ARB);
 600    /* GL_ARB_vertex_program */
 601    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 602                    enable->VertexProgram,
 603                    GL_VERTEX_PROGRAM_ARB);
 604    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 605                    enable->VertexProgramPointSize,
 606                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 607    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 608                    enable->VertexProgramTwoSide,
 609                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 610
 611    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 612    TEST_AND_UPDATE(ctx->Color.sRGBEnabled, enable->sRGBEnabled,
 613                    GL_FRAMEBUFFER_SRGB);
 614
 615    /* texture unit enables */
 616    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 617       const GLbitfield enabled = enable->Texture[i];
 618       const GLbitfield genEnabled = enable->TexGen[i];
 619
 620       if (ctx->Texture.Unit[i].Enabled != enabled) {
 621          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 622
 623          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 624          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 625          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 626          if (ctx->Extensions.NV_texture_rectangle) {
 627             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 628                              !!(enabled & TEXTURE_RECT_BIT));
 629          }
 630          if (ctx->Extensions.ARB_texture_cube_map) {
 631             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 632                              !!(enabled & TEXTURE_CUBE_BIT));
 633          }
 634          if (ctx->Extensions.MESA_texture_array) {
 635             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 636                              !!(enabled & TEXTURE_1D_ARRAY_BIT));
 637             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 638                              !!(enabled & TEXTURE_2D_ARRAY_BIT));
 639          }
 640       }
 641
 642       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 643          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 644          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 645          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 646          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 647          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 648       }
 649    }
 650
 651    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 652 }
 653
 654
 655 /**
 656  * Pop/restore texture attribute/group state.
 657  */
 658 static void
 659 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 660 {
 661    GLuint u;
 662
 663    _mesa_lock_context_textures(ctx);
 664
 665    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 666       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 667       GLuint tgt;
 668
 669       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 670       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 671       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 672       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 673       if (ctx->Extensions.ARB_texture_cube_map) {
 674          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 675                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 676       }
 677       if (ctx->Extensions.NV_texture_rectangle) {
 678          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 679                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 680       }
 681       if (ctx->Extensions.MESA_texture_array) {
 682          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 683                           !!(unit->Enabled & TEXTURE_1D_ARRAY_BIT));
 684          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 685                           !!(unit->Enabled & TEXTURE_2D_ARRAY_BIT));
 686       }
 687       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 688       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 689       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 690       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 691       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 692       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 693       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 694       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 695       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 696       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 697       /* Eye plane done differently to avoid re-transformation */
 698       {
 699          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 700          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 701          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 702          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 703          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 704          if (ctx->Driver.TexGen) {
 705             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 706             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 707             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 708             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 709          }
 710       }
 711       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 712       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 713       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 714       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 715       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 716                     unit->LodBias);
 717       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 718                     unit->Combine.ModeRGB);
 719       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 720                     unit->Combine.ModeA);
 721       {
 722          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 723          GLuint i;
 724          for (i = 0; i < n; i++) {
 725             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 726                           unit->Combine.SourceRGB[i]);
 727             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 728                           unit->Combine.SourceA[i]);
 729             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 730                           unit->Combine.OperandRGB[i]);
 731             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 732                           unit->Combine.OperandA[i]);
 733          }
 734       }
 735       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 736                     1 << unit->Combine.ScaleShiftRGB);
 737       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 738                     1 << unit->Combine.ScaleShiftA);
 739
 740       /* Restore texture object state for each target */
 741       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 742          const struct gl_texture_object *obj = NULL;
 743          const struct gl_sampler_object *samp;
 744          GLenum target;
 745
 746          obj = &texstate->SavedObj[u][tgt];
 747
 748          /* don't restore state for unsupported targets to prevent
 749           * raising GL errors.
 750           */
 751          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 752              !ctx->Extensions.ARB_texture_cube_map) {
 753             continue;
 754          }
 755          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 756                   !ctx->Extensions.NV_texture_rectangle) {
 757             continue;
 758          }
 759          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 760                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 761                   !ctx->Extensions.MESA_texture_array) {
 762             continue;
 763          }
 764          else if (obj->Target == GL_TEXTURE_CUBE_MAP_ARRAY &&
 765              !ctx->Extensions.ARB_texture_cube_map_array) {
 766             continue;
 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) {
 796             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE,
 797                                 samp->CompareMode);
 798             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_FUNC,
 799                                 samp->CompareFunc);
 800          }
 801          if (ctx->Extensions.ARB_depth_texture)
 802             _mesa_TexParameteri(target, GL_DEPTH_TEXTURE_MODE, obj->DepthMode);
 803       }
 804
 805       /* remove saved references to the texture objects */
 806       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 807          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 808       }
 809    }
 810
 811    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 812
 813    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 814
 815    _mesa_unlock_context_textures(ctx);
 816 }
 817
 818
 819 /*
 820  * This function is kind of long just because we have to call a lot
 821  * of device driver functions to update device driver state.
 822  *
 823  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 824  * in order to restore GL state.  This isn't terribly efficient but it
 825  * ensures that dirty flags and any derived state gets updated correctly.
 826  * We could at least check if the value to restore equals the current value
 827  * and then skip the Mesa call.
 828  */
 829 void GLAPIENTRY
 830 _mesa_PopAttrib(void)
 831 {
 832    struct gl_attrib_node *attr, *next;
 833    GET_CURRENT_CONTEXT(ctx);
 834    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 835
 836    if (ctx->AttribStackDepth == 0) {
 837       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 838       return;
 839    }
 840
 841    ctx->AttribStackDepth--;
 842    attr = ctx->AttribStack[ctx->AttribStackDepth];
 843
 844    while (attr) {
 845
 846       if (MESA_VERBOSE & VERBOSE_API) {
 847          _mesa_debug(ctx, "glPopAttrib %s\n",
 848                      _mesa_lookup_enum_by_nr(attr->kind));
 849       }
 850
 851       switch (attr->kind) {
 852          case GL_ACCUM_BUFFER_BIT:
 853             {
 854                const struct gl_accum_attrib *accum;
 855                accum = (const struct gl_accum_attrib *) attr->data;
 856                _mesa_ClearAccum(accum->ClearColor[0],
 857                                 accum->ClearColor[1],
 858                                 accum->ClearColor[2],
 859                                 accum->ClearColor[3]);
 860             }
 861             break;
 862          case GL_COLOR_BUFFER_BIT:
 863             {
 864                const struct gl_colorbuffer_attrib *color;
 865
 866                color = (const struct gl_colorbuffer_attrib *) attr->data;
 867                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 868                _mesa_ClearColor(color->ClearColor.f[0],
 869                                 color->ClearColor.f[1],
 870                                 color->ClearColor.f[2],
 871                                 color->ClearColor.f[3]);
 872                _mesa_IndexMask(color->IndexMask);
 873                if (!ctx->Extensions.EXT_draw_buffers2) {
 874                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 875                                   (GLboolean) (color->ColorMask[0][1] != 0),
 876                                   (GLboolean) (color->ColorMask[0][2] != 0),
 877                                   (GLboolean) (color->ColorMask[0][3] != 0));
 878                }
 879                else {
 880                   GLuint i;
 881                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 882                      _mesa_ColorMaskIndexed(i,
 883                                   (GLboolean) (color->ColorMask[i][0] != 0),
 884                                   (GLboolean) (color->ColorMask[i][1] != 0),
 885                                   (GLboolean) (color->ColorMask[i][2] != 0),
 886                                   (GLboolean) (color->ColorMask[i][3] != 0));
 887                   }
 888                }
 889                {
 890                   /* Need to determine if more than one color output is
 891                    * specified.  If so, call glDrawBuffersARB, else call
 892                    * glDrawBuffer().  This is a subtle, but essential point
 893                    * since GL_FRONT (for example) is illegal for the former
 894                    * function, but legal for the later.
 895                    */
 896                   GLboolean multipleBuffers = GL_FALSE;
 897                   GLuint i;
 898
 899                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 900                      if (color->DrawBuffer[i] != GL_NONE) {
 901                         multipleBuffers = GL_TRUE;
 902                         break;
 903                      }
 904                   }
 905                   /* Call the API_level functions, not _mesa_drawbuffers()
 906                    * since we need to do error checking on the pop'd
 907                    * GL_DRAW_BUFFER.
 908                    * Ex: if GL_FRONT were pushed, but we're popping with a
 909                    * user FBO bound, GL_FRONT will be illegal and we'll need
 910                    * to record that error.  Per OpenGL ARB decision.
 911                    */
 912                   if (multipleBuffers)
 913                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 914                                           color->DrawBuffer);
 915                   else
 916                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 917                }
 918                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 919                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 920                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 921                   if (ctx->Extensions.EXT_draw_buffers2) {
 922                      GLuint i;
 923                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 924                         _mesa_set_enablei(ctx, GL_BLEND, i,
 925                                           (color->BlendEnabled >> i) & 1);
 926                      }
 927                   }
 928                   else {
 929                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 930                   }
 931                }
 932                if (ctx->Color._BlendFuncPerBuffer ||
 933                    ctx->Color._BlendEquationPerBuffer) {
 934                   /* set blend per buffer */
 935                   GLuint buf;
 936                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
 937                      _mesa_BlendFuncSeparatei(buf, color->Blend[buf].SrcRGB,
 938                                               color->Blend[buf].DstRGB,
 939                                               color->Blend[buf].SrcA,
 940                                               color->Blend[buf].DstA);
 941                      _mesa_BlendEquationSeparatei(buf,
 942                                                   color->Blend[buf].EquationRGB,
 943                                                   color->Blend[buf].EquationA);
 944                   }
 945                }
 946                else {
 947                   /* set same blend modes for all buffers */
 948                   _mesa_BlendFuncSeparateEXT(color->Blend[0].SrcRGB,
 949                                              color->Blend[0].DstRGB,
 950                                              color->Blend[0].SrcA,
 951                                              color->Blend[0].DstA);
 952                   /* This special case is because glBlendEquationSeparateEXT
 953                    * cannot take GL_LOGIC_OP as a parameter.
 954                    */
 955                   if (color->Blend[0].EquationRGB ==
 956                       color->Blend[0].EquationA) {
 957                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
 958                   }
 959                   else {
 960                      _mesa_BlendEquationSeparateEXT(
 961                                                  color->Blend[0].EquationRGB,
 962                                                  color->Blend[0].EquationA);
 963                   }
 964                }
 965                _mesa_BlendColor(color->BlendColorUnclamped[0],
 966                                 color->BlendColorUnclamped[1],
 967                                 color->BlendColorUnclamped[2],
 968                                 color->BlendColorUnclamped[3]);
 969                _mesa_LogicOp(color->LogicOp);
 970                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 971                                 color->ColorLogicOpEnabled);
 972                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 973                                 color->IndexLogicOpEnabled);
 974                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 975                _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, color->ClampFragmentColor);
 976                _mesa_ClampColorARB(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 977
 978                /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 979                if (ctx->Extensions.EXT_framebuffer_sRGB)
 980                   _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB, color->sRGBEnabled);
 981             }
 982             break;
 983          case GL_CURRENT_BIT:
 984             FLUSH_CURRENT( ctx, 0 );
 985             memcpy( &ctx->Current, attr->data,
 986                     sizeof(struct gl_current_attrib) );
 987             break;
 988          case GL_DEPTH_BUFFER_BIT:
 989             {
 990                const struct gl_depthbuffer_attrib *depth;
 991                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 992                _mesa_DepthFunc(depth->Func);
 993                _mesa_ClearDepth(depth->Clear);
 994                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 995                _mesa_DepthMask(depth->Mask);
 996             }
 997             break;
 998          case GL_ENABLE_BIT:
 999             {
1000                const struct gl_enable_attrib *enable;
1001                enable = (const struct gl_enable_attrib *) attr->data;
1002                pop_enable_group(ctx, enable);
1003                ctx->NewState |= _NEW_ALL;
1004             }
1005             break;
1006          case GL_EVAL_BIT:
1007             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
1008             ctx->NewState |= _NEW_EVAL;
1009             break;
1010          case GL_FOG_BIT:
1011             {
1012                const struct gl_fog_attrib *fog;
1013                fog = (const struct gl_fog_attrib *) attr->data;
1014                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1015                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1016                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1017                _mesa_Fogf(GL_FOG_START, fog->Start);
1018                _mesa_Fogf(GL_FOG_END, fog->End);
1019                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1020                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1021             }
1022             break;
1023          case GL_HINT_BIT:
1024             {
1025                const struct gl_hint_attrib *hint;
1026                hint = (const struct gl_hint_attrib *) attr->data;
1027                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1028                           hint->PerspectiveCorrection );
1029                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1030                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1031                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1032                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1033                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1034                           hint->ClipVolumeClipping);
1035                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1036                           hint->TextureCompression);
1037             }
1038             break;
1039          case GL_LIGHTING_BIT:
1040             {
1041                GLuint i;
1042                const struct gl_light_attrib *light;
1043                light = (const struct gl_light_attrib *) attr->data;
1044                /* lighting enable */
1045                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1046                /* per-light state */
1047                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1048                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1049
1050                for (i = 0; i < ctx->Const.MaxLights; i++) {
1051                   const struct gl_light *l = &light->Light[i];
1052                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1053                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1054                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1055                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1056                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1057                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1058                   {
1059                      GLfloat p[4] = { 0 };
1060                      p[0] = l->SpotExponent;
1061                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1062                   }
1063                   {
1064                      GLfloat p[4] = { 0 };
1065                      p[0] = l->SpotCutoff;
1066                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1067                   }
1068                   {
1069                      GLfloat p[4] = { 0 };
1070                      p[0] = l->ConstantAttenuation;
1071                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1072                   }
1073                   {
1074                      GLfloat p[4] = { 0 };
1075                      p[0] = l->LinearAttenuation;
1076                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1077                   }
1078                   {
1079                      GLfloat p[4] = { 0 };
1080                      p[0] = l->QuadraticAttenuation;
1081                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1082                   }
1083                }
1084                /* light model */
1085                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1086                                   light->Model.Ambient);
1087                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1088                                  (GLfloat) light->Model.LocalViewer);
1089                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1090                                  (GLfloat) light->Model.TwoSide);
1091                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1092                                  (GLfloat) light->Model.ColorControl);
1093                /* shade model */
1094                _mesa_ShadeModel(light->ShadeModel);
1095                /* color material */
1096                _mesa_ColorMaterial(light->ColorMaterialFace,
1097                                    light->ColorMaterialMode);
1098                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1099                                 light->ColorMaterialEnabled);
1100                /* materials */
1101                memcpy(&ctx->Light.Material, &light->Material,
1102                       sizeof(struct gl_material));
1103                _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, light->ClampVertexColor);
1104             }
1105             break;
1106          case GL_LINE_BIT:
1107             {
1108                const struct gl_line_attrib *line;
1109                line = (const struct gl_line_attrib *) attr->data;
1110                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1111                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1112                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1113                _mesa_LineWidth(line->Width);
1114             }
1115             break;
1116          case GL_LIST_BIT:
1117             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1118             break;
1119          case GL_PIXEL_MODE_BIT:
1120             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1121             /* XXX what other pixel state needs to be set by function calls? */
1122             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1123             ctx->NewState |= _NEW_PIXEL;
1124             break;
1125          case GL_POINT_BIT:
1126             {
1127                const struct gl_point_attrib *point;
1128                point = (const struct gl_point_attrib *) attr->data;
1129                _mesa_PointSize(point->Size);
1130                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1131                if (ctx->Extensions.EXT_point_parameters) {
1132                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1133                                          point->Params);
1134                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1135                                         point->MinSize);
1136                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1137                                         point->MaxSize);
1138                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1139                                         point->Threshold);
1140                }
1141                if (ctx->Extensions.NV_point_sprite
1142                    || ctx->Extensions.ARB_point_sprite) {
1143                   GLuint u;
1144                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1145                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1146                                    (GLint) point->CoordReplace[u]);
1147                   }
1148                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1149                   if (ctx->Extensions.NV_point_sprite)
1150                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1151                                            ctx->Point.SpriteRMode);
1152
1153                   if ((ctx->API == API_OPENGL && ctx->Version >= 20)
1154                       || ctx->API == API_OPENGL_CORE)
1155                      _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1156                                            (GLfloat)ctx->Point.SpriteOrigin);
1157                }
1158             }
1159             break;
1160          case GL_POLYGON_BIT:
1161             {
1162                const struct gl_polygon_attrib *polygon;
1163                polygon = (const struct gl_polygon_attrib *) attr->data;
1164                _mesa_CullFace(polygon->CullFaceMode);
1165                _mesa_FrontFace(polygon->FrontFace);
1166                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1167                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1168                _mesa_PolygonOffset(polygon->OffsetFactor,
1169                                    polygon->OffsetUnits);
1170                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1171                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1172                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1173                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1174                                 polygon->OffsetPoint);
1175                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1176                                 polygon->OffsetLine);
1177                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1178                                 polygon->OffsetFill);
1179             }
1180             break;
1181          case GL_POLYGON_STIPPLE_BIT:
1182             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1183             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1184             if (ctx->Driver.PolygonStipple)
1185                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1186             break;
1187          case GL_SCISSOR_BIT:
1188             {
1189                const struct gl_scissor_attrib *scissor;
1190                scissor = (const struct gl_scissor_attrib *) attr->data;
1191                _mesa_Scissor(scissor->X, scissor->Y,
1192                              scissor->Width, scissor->Height);
1193                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1194             }
1195             break;
1196          case GL_STENCIL_BUFFER_BIT:
1197             {
1198                const struct gl_stencil_attrib *stencil;
1199                stencil = (const struct gl_stencil_attrib *) attr->data;
1200                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1201                _mesa_ClearStencil(stencil->Clear);
1202                if (ctx->Extensions.EXT_stencil_two_side) {
1203                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1204                                    stencil->TestTwoSide);
1205                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1206                                              ? GL_BACK : GL_FRONT);
1207                }
1208                /* front state */
1209                _mesa_StencilFuncSeparate(GL_FRONT,
1210                                          stencil->Function[0],
1211                                          stencil->Ref[0],
1212                                          stencil->ValueMask[0]);
1213                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1214                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1215                                        stencil->ZFailFunc[0],
1216                                        stencil->ZPassFunc[0]);
1217                /* back state */
1218                _mesa_StencilFuncSeparate(GL_BACK,
1219                                          stencil->Function[1],
1220                                          stencil->Ref[1],
1221                                          stencil->ValueMask[1]);
1222                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1223                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1224                                        stencil->ZFailFunc[1],
1225                                        stencil->ZPassFunc[1]);
1226             }
1227             break;
1228          case GL_TRANSFORM_BIT:
1229             {
1230                GLuint i;
1231                const struct gl_transform_attrib *xform;
1232                xform = (const struct gl_transform_attrib *) attr->data;
1233                _mesa_MatrixMode(xform->MatrixMode);
1234                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1235                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1236
1237                /* restore clip planes */
1238                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1239                   const GLuint mask = 1 << i;
1240                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1241                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1242                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1243                                    !!(xform->ClipPlanesEnabled & mask));
1244                   if (ctx->Driver.ClipPlane)
1245                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1246                }
1247
1248                /* normalize/rescale */
1249                if (xform->Normalize != ctx->Transform.Normalize)
1250                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1251                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1252                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1253                                    ctx->Transform.RescaleNormals);
1254                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1255                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1256                                    ctx->Transform.DepthClamp);
1257             }
1258             break;
1259          case GL_TEXTURE_BIT:
1260             {
1261                struct texture_state *texstate
1262                   = (struct texture_state *) attr->data;
1263                pop_texture_group(ctx, texstate);
1264                ctx->NewState |= _NEW_TEXTURE;
1265             }
1266             break;
1267          case GL_VIEWPORT_BIT:
1268             {
1269                const struct gl_viewport_attrib *vp;
1270                vp = (const struct gl_viewport_attrib *) attr->data;
1271                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1272                _mesa_DepthRange(vp->Near, vp->Far);
1273             }
1274             break;
1275          case GL_MULTISAMPLE_BIT_ARB:
1276             {
1277                const struct gl_multisample_attrib *ms;
1278                ms = (const struct gl_multisample_attrib *) attr->data;
1279
1280                TEST_AND_UPDATE(ctx->Multisample.Enabled,
1281                                ms->Enabled,
1282                                GL_MULTISAMPLE);
1283
1284                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
1285                                ms->SampleCoverage,
1286                                GL_SAMPLE_COVERAGE);
1287
1288                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
1289                                ms->SampleAlphaToCoverage,
1290                                GL_SAMPLE_ALPHA_TO_COVERAGE);
1291
1292                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
1293                                ms->SampleAlphaToOne,
1294                                GL_SAMPLE_ALPHA_TO_ONE);
1295
1296                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1297                                        ms->SampleCoverageInvert);
1298             }
1299             break;
1300
1301          default:
1302             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1303             break;
1304       }
1305
1306       next = attr->next;
1307       free(attr->data);
1308       free(attr);
1309       attr = next;
1310    }
1311 }
1312
1313
1314 /**
1315  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1316  * object refcounts.
1317  */
1318 static void
1319 copy_pixelstore(struct gl_context *ctx,
1320                 struct gl_pixelstore_attrib *dst,
1321                 const struct gl_pixelstore_attrib *src)
1322 {
1323    dst->Alignment = src->Alignment;
1324    dst->RowLength = src->RowLength;
1325    dst->SkipPixels = src->SkipPixels;
1326    dst->SkipRows = src->SkipRows;
1327    dst->ImageHeight = src->ImageHeight;
1328    dst->SkipImages = src->SkipImages;
1329    dst->SwapBytes = src->SwapBytes;
1330    dst->LsbFirst = src->LsbFirst;
1331    dst->Invert = src->Invert;
1332    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1333 }
1334
1335
1336 #define GL_CLIENT_PACK_BIT (1<<20)
1337 #define GL_CLIENT_UNPACK_BIT (1<<21)
1338
1339 /**
1340  * Copy gl_array_object from src to dest.
1341  * 'dest' must be in an initialized state.
1342  */
1343 static void
1344 copy_array_object(struct gl_context *ctx,
1345                   struct gl_array_object *dest,
1346                   struct gl_array_object *src)
1347 {
1348    GLuint i;
1349
1350    /* skip Name */
1351    /* skip RefCount */
1352
1353    /* In theory must be the same anyway, but on recreate make sure it matches */
1354    dest->ARBsemantics = src->ARBsemantics;
1355
1356    for (i = 0; i < Elements(src->VertexAttrib); i++)
1357       _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1358
1359    /* _Enabled must be the same than on push */
1360    dest->_Enabled = src->_Enabled;
1361    dest->_MaxElement = src->_MaxElement;
1362 }
1363
1364 /**
1365  * Copy gl_array_attrib from src to dest.
1366  * 'dest' must be in an initialized state.
1367  */
1368 static void
1369 copy_array_attrib(struct gl_context *ctx,
1370                   struct gl_array_attrib *dest,
1371                   struct gl_array_attrib *src,
1372                   bool vbo_deleted)
1373 {
1374    /* skip ArrayObj */
1375    /* skip DefaultArrayObj, Objects */
1376    dest->ActiveTexture = src->ActiveTexture;
1377    dest->LockFirst = src->LockFirst;
1378    dest->LockCount = src->LockCount;
1379    dest->PrimitiveRestart = src->PrimitiveRestart;
1380    dest->RestartIndex = src->RestartIndex;
1381    /* skip NewState */
1382    /* skip RebindArrays */
1383
1384    if (!vbo_deleted)
1385       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1386
1387    /* skip ArrayBufferObj */
1388    /* skip ElementArrayBufferObj */
1389 }
1390
1391 /**
1392  * Save the content of src to dest.
1393  */
1394 static void
1395 save_array_attrib(struct gl_context *ctx,
1396                   struct gl_array_attrib *dest,
1397                   struct gl_array_attrib *src)
1398 {
1399    /* Set the Name, needed for restore, but do never overwrite.
1400     * Needs to match value in the object hash. */
1401    dest->ArrayObj->Name = src->ArrayObj->Name;
1402    /* And copy all of the rest. */
1403    copy_array_attrib(ctx, dest, src, false);
1404
1405    /* Just reference them here */
1406    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1407                                  src->ArrayBufferObj);
1408    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1409                                  src->ArrayObj->ElementArrayBufferObj);
1410 }
1411
1412 /**
1413  * Restore the content of src to dest.
1414  */
1415 static void
1416 restore_array_attrib(struct gl_context *ctx,
1417                      struct gl_array_attrib *dest,
1418                      struct gl_array_attrib *src)
1419 {
1420    /* The ARB_vertex_array_object spec says:
1421     *
1422     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1423     *     if array is not a name returned from a previous call to
1424     *     GenVertexArrays, or if such a name has since been deleted with
1425     *     DeleteVertexArrays."
1426     *
1427     * Therefore popping a deleted VAO cannot magically recreate it.
1428     *
1429     * The semantics of objects created using APPLE_vertex_array_objects behave
1430     * differently.  These objects expect to be recreated by pop.  Alas.
1431     */
1432    const bool arb_vao = (src->ArrayObj->Name != 0
1433                          && src->ArrayObj->ARBsemantics);
1434
1435    if (arb_vao && !_mesa_IsVertexArrayAPPLE(src->ArrayObj->Name))
1436       return;
1437
1438    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1439
1440    /* Restore or recreate the buffer objects by the names ... */
1441    if (!arb_vao
1442        || src->ArrayBufferObj->Name == 0
1443        || _mesa_IsBufferARB(src->ArrayBufferObj->Name)) {
1444       /* ... and restore its content */
1445       copy_array_attrib(ctx, dest, src, false);
1446
1447       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1448                           src->ArrayBufferObj->Name);
1449    } else {
1450       copy_array_attrib(ctx, dest, src, true);
1451    }
1452
1453    if (!arb_vao
1454        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1455        || _mesa_IsBufferARB(src->ArrayObj->ElementArrayBufferObj->Name))
1456       _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1457                           src->ArrayObj->ElementArrayBufferObj->Name);
1458 }
1459
1460 /**
1461  * init/alloc the fields of 'attrib'.
1462  * Needs to the init part matching free_array_attrib_data below.
1463  */
1464 static void
1465 init_array_attrib_data(struct gl_context *ctx,
1466                        struct gl_array_attrib *attrib)
1467 {
1468    /* Get a non driver gl_array_object. */
1469    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1470    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1471 }
1472
1473 /**
1474  * Free/unreference the fields of 'attrib' but don't delete it (that's
1475  * done later in the calling code).
1476  * Needs to the cleanup part matching init_array_attrib_data above.
1477  */
1478 static void
1479 free_array_attrib_data(struct gl_context *ctx,
1480                        struct gl_array_attrib *attrib)
1481 {
1482    /* We use a non driver array object, so don't just unref since we would
1483     * end up using the drivers DeleteArrayObject function for deletion. */
1484    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1485    attrib->ArrayObj = 0;
1486    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1487 }
1488
1489
1490 void GLAPIENTRY
1491 _mesa_PushClientAttrib(GLbitfield mask)
1492 {
1493    struct gl_attrib_node *head;
1494
1495    GET_CURRENT_CONTEXT(ctx);
1496    ASSERT_OUTSIDE_BEGIN_END(ctx);
1497
1498    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1499       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1500       return;
1501    }
1502
1503    /* Build linked list of attribute nodes which save all attribute
1504     * groups specified by the mask.
1505     */
1506    head = NULL;
1507
1508    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1509       struct gl_pixelstore_attrib *attr;
1510       /* packing attribs */
1511       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1512       copy_pixelstore(ctx, attr, &ctx->Pack);
1513       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1514       /* unpacking attribs */
1515       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1516       copy_pixelstore(ctx, attr, &ctx->Unpack);
1517       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1518    }
1519
1520    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1521       struct gl_array_attrib *attr;
1522       attr = CALLOC_STRUCT( gl_array_attrib );
1523       init_array_attrib_data(ctx, attr);
1524       save_array_attrib(ctx, attr, &ctx->Array);
1525       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1526    }
1527
1528    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1529    ctx->ClientAttribStackDepth++;
1530 }
1531
1532
1533
1534
1535 void GLAPIENTRY
1536 _mesa_PopClientAttrib(void)
1537 {
1538    struct gl_attrib_node *node, *next;
1539
1540    GET_CURRENT_CONTEXT(ctx);
1541    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1542
1543    if (ctx->ClientAttribStackDepth == 0) {
1544       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1545       return;
1546    }
1547
1548    ctx->ClientAttribStackDepth--;
1549    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1550
1551    while (node) {
1552       switch (node->kind) {
1553          case GL_CLIENT_PACK_BIT:
1554             {
1555                struct gl_pixelstore_attrib *store =
1556                   (struct gl_pixelstore_attrib *) node->data;
1557                copy_pixelstore(ctx, &ctx->Pack, store);
1558                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1559             }
1560             ctx->NewState |= _NEW_PACKUNPACK;
1561             break;
1562          case GL_CLIENT_UNPACK_BIT:
1563             {
1564                struct gl_pixelstore_attrib *store =
1565                   (struct gl_pixelstore_attrib *) node->data;
1566                copy_pixelstore(ctx, &ctx->Unpack, store);
1567                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1568             }
1569             ctx->NewState |= _NEW_PACKUNPACK;
1570             break;
1571          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1572             struct gl_array_attrib * attr =
1573               (struct gl_array_attrib *) node->data;
1574             restore_array_attrib(ctx, &ctx->Array, attr);
1575             free_array_attrib_data(ctx, attr);
1576             ctx->NewState |= _NEW_ARRAY;
1577             break;
1578          }
1579          default:
1580             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1581             break;
1582       }
1583
1584       next = node->next;
1585       free(node->data);
1586       free(node);
1587       node = next;
1588    }
1589 }
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 }