reactos/dll/opengl/mesa/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 DepthTest;
  78    GLboolean Dither;
  79    GLboolean Fog;
  80    GLboolean Light[MAX_LIGHTS];
  81    GLboolean Lighting;
  82    GLboolean LineSmooth;
  83    GLboolean LineStipple;
  84    GLboolean IndexLogicOp;
  85    GLboolean ColorLogicOp;
  86
  87    GLboolean Map1Color4;
  88    GLboolean Map1Index;
  89    GLboolean Map1Normal;
  90    GLboolean Map1TextureCoord1;
  91    GLboolean Map1TextureCoord2;
  92    GLboolean Map1TextureCoord3;
  93    GLboolean Map1TextureCoord4;
  94    GLboolean Map1Vertex3;
  95    GLboolean Map1Vertex4;
  96    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
  97    GLboolean Map2Color4;
  98    GLboolean Map2Index;
  99    GLboolean Map2Normal;
 100    GLboolean Map2TextureCoord1;
 101    GLboolean Map2TextureCoord2;
 102    GLboolean Map2TextureCoord3;
 103    GLboolean Map2TextureCoord4;
 104    GLboolean Map2Vertex3;
 105    GLboolean Map2Vertex4;
 106    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 107
 108    GLboolean Normalize;
 109    GLboolean PixelTexture;
 110    GLboolean PointSmooth;
 111    GLboolean PolygonOffsetPoint;
 112    GLboolean PolygonOffsetLine;
 113    GLboolean PolygonOffsetFill;
 114    GLboolean PolygonSmooth;
 115    GLboolean PolygonStipple;
 116    GLboolean RescaleNormals;
 117    GLboolean Scissor;
 118    GLboolean Stencil;
 119    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 120    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 121    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 122    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 123    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 124    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 125
 126    GLbitfield Texture[MAX_TEXTURE_UNITS];
 127    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 128
 129    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 130    GLboolean VertexProgram;
 131    GLboolean VertexProgramPointSize;
 132    GLboolean VertexProgramTwoSide;
 133
 134    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 135    GLboolean PointSprite;
 136 };
 137
 138
 139 /**
 140  * Node for the attribute stack.
 141  */
 142 struct gl_attrib_node
 143 {
 144    GLbitfield kind;
 145    void *data;
 146    struct gl_attrib_node *next;
 147 };
 148
 149
 150
 151 /**
 152  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 153  */
 154 struct texture_state
 155 {
 156    struct gl_texture_attrib Texture;  /**< The usual context state */
 157
 158    /** to save per texture object state (wrap modes, filters, etc): */
 159    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 160
 161    /**
 162     * To save references to texture objects (so they don't get accidentally
 163     * deleted while saved in the attribute stack).
 164     */
 165    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 166
 167    /* We need to keep a reference to the shared state.  That's where the
 168     * default texture objects are kept.  We don't want that state to be
 169     * freed while the attribute stack contains pointers to any default
 170     * texture objects.
 171     */
 172    struct gl_shared_state *SharedRef;
 173 };
 174
 175
 176 #if FEATURE_attrib_stack
 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       struct gl_colorbuffer_attrib *attr;
 230       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 231       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 232       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 233       attr->DrawBuffer = ctx->DrawBuffer->ColorDrawBuffer;
 234       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 235    }
 236
 237    if (mask & GL_CURRENT_BIT) {
 238       struct gl_current_attrib *attr;
 239       FLUSH_CURRENT( ctx, 0 );
 240       attr = MALLOC_STRUCT( gl_current_attrib );
 241       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 242       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 243    }
 244
 245    if (mask & GL_DEPTH_BUFFER_BIT) {
 246       struct gl_depthbuffer_attrib *attr;
 247       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 248       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 249       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 250    }
 251
 252    if (mask & GL_ENABLE_BIT) {
 253       struct gl_enable_attrib *attr;
 254       GLuint i;
 255       attr = MALLOC_STRUCT( gl_enable_attrib );
 256       /* Copy enable flags from all other attributes into the enable struct. */
 257       attr->AlphaTest = ctx->Color.AlphaEnabled;
 258       attr->AutoNormal = ctx->Eval.AutoNormal;
 259       attr->Blend = ctx->Color.BlendEnabled;
 260       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 261       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 262       attr->CullFace = ctx->Polygon.CullFlag;
 263       attr->DepthTest = ctx->Depth.Test;
 264       attr->Dither = ctx->Color.DitherFlag;
 265       attr->Fog = ctx->Fog.Enabled;
 266       for (i = 0; i < ctx->Const.MaxLights; i++) {
 267          attr->Light[i] = ctx->Light.Light[i].Enabled;
 268       }
 269       attr->Lighting = ctx->Light.Enabled;
 270       attr->LineSmooth = ctx->Line.SmoothFlag;
 271       attr->LineStipple = ctx->Line.StippleFlag;
 272       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 273       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 274       attr->Map1Color4 = ctx->Eval.Map1Color4;
 275       attr->Map1Index = ctx->Eval.Map1Index;
 276       attr->Map1Normal = ctx->Eval.Map1Normal;
 277       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 278       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 279       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 280       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 281       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 282       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 283       memcpy(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 284       attr->Map2Color4 = ctx->Eval.Map2Color4;
 285       attr->Map2Index = ctx->Eval.Map2Index;
 286       attr->Map2Normal = ctx->Eval.Map2Normal;
 287       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 288       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 289       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 290       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 291       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 292       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 293       memcpy(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 294       attr->Normalize = ctx->Transform.Normalize;
 295       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 296       attr->PointSmooth = ctx->Point.SmoothFlag;
 297       attr->PointSprite = ctx->Point.PointSprite;
 298       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 299       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 300       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 301       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 302       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 303       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 304       attr->Scissor = ctx->Scissor.Enabled;
 305       attr->Stencil = ctx->Stencil.Enabled;
 306       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 307       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 308       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 309       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 310       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 311       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 312          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 313          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 314       }
 315       /* GL_NV_vertex_program */
 316       attr->VertexProgram = ctx->VertexProgram.Enabled;
 317       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 318       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 319       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 320    }
 321
 322    if (mask & GL_EVAL_BIT) {
 323       struct gl_eval_attrib *attr;
 324       attr = MALLOC_STRUCT( gl_eval_attrib );
 325       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 326       save_attrib_data(&head, GL_EVAL_BIT, attr);
 327    }
 328
 329    if (mask & GL_FOG_BIT) {
 330       struct gl_fog_attrib *attr;
 331       attr = MALLOC_STRUCT( gl_fog_attrib );
 332       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 333       save_attrib_data(&head, GL_FOG_BIT, attr);
 334    }
 335
 336    if (mask & GL_HINT_BIT) {
 337       struct gl_hint_attrib *attr;
 338       attr = MALLOC_STRUCT( gl_hint_attrib );
 339       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 340       save_attrib_data(&head, GL_HINT_BIT, attr);
 341    }
 342
 343    if (mask & GL_LIGHTING_BIT) {
 344       struct gl_light_attrib *attr;
 345       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 346       attr = MALLOC_STRUCT( gl_light_attrib );
 347       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 348       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 349    }
 350
 351    if (mask & GL_LINE_BIT) {
 352       struct gl_line_attrib *attr;
 353       attr = MALLOC_STRUCT( gl_line_attrib );
 354       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 355       save_attrib_data(&head, GL_LINE_BIT, attr);
 356    }
 357
 358    if (mask & GL_LIST_BIT) {
 359       struct gl_list_attrib *attr;
 360       attr = MALLOC_STRUCT( gl_list_attrib );
 361       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 362       save_attrib_data(&head, GL_LIST_BIT, attr);
 363    }
 364
 365    if (mask & GL_PIXEL_MODE_BIT) {
 366       struct gl_pixel_attrib *attr;
 367       attr = MALLOC_STRUCT( gl_pixel_attrib );
 368       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 369       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 370       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 371       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 372    }
 373
 374    if (mask & GL_POINT_BIT) {
 375       struct gl_point_attrib *attr;
 376       attr = MALLOC_STRUCT( gl_point_attrib );
 377       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 378       save_attrib_data(&head, GL_POINT_BIT, attr);
 379    }
 380
 381    if (mask & GL_POLYGON_BIT) {
 382       struct gl_polygon_attrib *attr;
 383       attr = MALLOC_STRUCT( gl_polygon_attrib );
 384       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 385       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 386    }
 387
 388    if (mask & GL_POLYGON_STIPPLE_BIT) {
 389       GLuint *stipple;
 390       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 391       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 392       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 393    }
 394
 395    if (mask & GL_SCISSOR_BIT) {
 396       struct gl_scissor_attrib *attr;
 397       attr = MALLOC_STRUCT( gl_scissor_attrib );
 398       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 399       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 400    }
 401
 402    if (mask & GL_STENCIL_BUFFER_BIT) {
 403       struct gl_stencil_attrib *attr;
 404       attr = MALLOC_STRUCT( gl_stencil_attrib );
 405       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 406       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 407    }
 408
 409    if (mask & GL_TEXTURE_BIT) {
 410       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 411       GLuint u, tex;
 412
 413       if (!texstate) {
 414          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 415          goto end;
 416       }
 417
 418       _mesa_lock_context_textures(ctx);
 419
 420       /* copy/save the bulk of texture state here */
 421       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 422
 423       /* Save references to the currently bound texture objects so they don't
 424        * accidentally get deleted while referenced in the attribute stack.
 425        */
 426       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 427          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 428             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 429                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 430          }
 431       }
 432
 433       /* copy state/contents of the currently bound texture objects */
 434       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 435          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 436             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 437                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 438          }
 439       }
 440
 441       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 442
 443       _mesa_unlock_context_textures(ctx);
 444
 445       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 446    }
 447
 448    if (mask & GL_TRANSFORM_BIT) {
 449       struct gl_transform_attrib *attr;
 450       attr = MALLOC_STRUCT( gl_transform_attrib );
 451       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 452       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 453    }
 454
 455    if (mask & GL_VIEWPORT_BIT) {
 456       struct gl_viewport_attrib *attr;
 457       attr = MALLOC_STRUCT( gl_viewport_attrib );
 458       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 459       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 460    }
 461
 462    /* GL_ARB_multisample */
 463    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 464       struct gl_multisample_attrib *attr;
 465       attr = MALLOC_STRUCT( gl_multisample_attrib );
 466       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 467       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 468    }
 469
 470 end:
 471    ctx->AttribStack[ctx->AttribStackDepth] = head;
 472    ctx->AttribStackDepth++;
 473 }
 474
 475
 476
 477 static void
 478 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 479 {
 480    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 481    GLuint i;
 482
 483 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 484         if ((VALUE) != (NEWVALUE)) {                    \
 485            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 486         }
 487
 488    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 489    if (ctx->Color.BlendEnabled != enable->Blend) {
 490       _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 491    }
 492
 493    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 494       const GLuint mask = 1 << i;
 495       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 496           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 497                            !!(enable->ClipPlanes & mask));
 498    }
 499
 500    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 501                    GL_COLOR_MATERIAL);
 502    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 503    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 504    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 505    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 506    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 507    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 508    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 509                    GL_LINE_STIPPLE);
 510    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 511                    GL_INDEX_LOGIC_OP);
 512    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 513                    GL_COLOR_LOGIC_OP);
 514
 515    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 516    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 517    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 518    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 519                    GL_MAP1_TEXTURE_COORD_1);
 520    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 521                    GL_MAP1_TEXTURE_COORD_2);
 522    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 523                    GL_MAP1_TEXTURE_COORD_3);
 524    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 525                    GL_MAP1_TEXTURE_COORD_4);
 526    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 527                    GL_MAP1_VERTEX_3);
 528    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 529                    GL_MAP1_VERTEX_4);
 530    for (i = 0; i < 16; i++) {
 531       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 532                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 533    }
 534
 535    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 536    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 537    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 538    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 539                    GL_MAP2_TEXTURE_COORD_1);
 540    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 541                    GL_MAP2_TEXTURE_COORD_2);
 542    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 543                    GL_MAP2_TEXTURE_COORD_3);
 544    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 545                    GL_MAP2_TEXTURE_COORD_4);
 546    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 547                    GL_MAP2_VERTEX_3);
 548    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 549                    GL_MAP2_VERTEX_4);
 550    for (i = 0; i < 16; i++) {
 551       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 552                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 553    }
 554
 555    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 556    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 557    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 558                    GL_RESCALE_NORMAL_EXT);
 559    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 560                    enable->RasterPositionUnclipped,
 561                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 562    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 563                    GL_POINT_SMOOTH);
 564    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 565       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 566                       GL_POINT_SPRITE_NV);
 567    }
 568    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 569                    GL_POLYGON_OFFSET_POINT);
 570    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 571                    GL_POLYGON_OFFSET_LINE);
 572    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 573                    GL_POLYGON_OFFSET_FILL);
 574    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 575                    GL_POLYGON_SMOOTH);
 576    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 577                    GL_POLYGON_STIPPLE);
 578    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 579    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 580    if (ctx->Extensions.EXT_stencil_two_side) {
 581       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 582    }
 583    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 584                    GL_MULTISAMPLE_ARB);
 585    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 586                    enable->SampleAlphaToCoverage,
 587                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 588    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 589                    enable->SampleAlphaToOne,
 590                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 591    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 592                    enable->SampleCoverage,
 593                    GL_SAMPLE_COVERAGE_ARB);
 594    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 595    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 596                    enable->VertexProgram,
 597                    GL_VERTEX_PROGRAM_ARB);
 598    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 599                    enable->VertexProgramPointSize,
 600                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 601    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 602                    enable->VertexProgramTwoSide,
 603                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 604
 605    /* texture unit enables */
 606    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 607       const GLbitfield enabled = enable->Texture[i];
 608       const GLbitfield genEnabled = enable->TexGen[i];
 609
 610       if (ctx->Texture.Unit[i].Enabled != enabled) {
 611          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 612
 613          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 614          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 615          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 616          if (ctx->Extensions.ARB_texture_cube_map) {
 617             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 618                              !!(enabled & TEXTURE_CUBE_BIT));
 619          }
 620       }
 621
 622       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 623          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 624          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 625          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 626          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 627          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 628       }
 629    }
 630
 631    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 632 }
 633
 634
 635 /**
 636  * Pop/restore texture attribute/group state.
 637  */
 638 static void
 639 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 640 {
 641    GLuint u;
 642
 643    _mesa_lock_context_textures(ctx);
 644
 645    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 646       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 647       GLuint tgt;
 648
 649       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 650       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 651       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 652       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 653       if (ctx->Extensions.ARB_texture_cube_map) {
 654          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 655                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 656       }
 657
 658       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 659       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 660       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 661       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 662       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 663       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 664       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 665       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 666       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 667       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 668       /* Eye plane done differently to avoid re-transformation */
 669       {
 670          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 671          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 672          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 673          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 674          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 675          if (ctx->Driver.TexGen) {
 676             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 677             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 678             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 679             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 680          }
 681       }
 682       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 683       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 684       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 685       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 686       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 687                     unit->LodBias);
 688       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 689                     unit->Combine.ModeRGB);
 690       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 691                     unit->Combine.ModeA);
 692       {
 693          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 694          GLuint i;
 695          for (i = 0; i < n; i++) {
 696             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 697                           unit->Combine.SourceRGB[i]);
 698             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 699                           unit->Combine.SourceA[i]);
 700             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 701                           unit->Combine.OperandRGB[i]);
 702             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 703                           unit->Combine.OperandA[i]);
 704          }
 705       }
 706       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 707                     1 << unit->Combine.ScaleShiftRGB);
 708       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 709                     1 << unit->Combine.ScaleShiftA);
 710
 711       /* Restore texture object state for each target */
 712       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 713          const struct gl_texture_object *obj = NULL;
 714          const struct gl_sampler_object *samp;
 715          GLenum target;
 716
 717          obj = &texstate->SavedObj[u][tgt];
 718
 719          /* don't restore state for unsupported targets to prevent
 720           * raising GL errors.
 721           */
 722          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 723              !ctx->Extensions.ARB_texture_cube_map) {
 724             continue;
 725          }
 726
 727          target = obj->Target;
 728
 729          _mesa_BindTexture(target, obj->Name);
 730
 731          samp = &obj->Sampler;
 732
 733          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 734          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 735          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 736          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 737          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 738          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 739          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 740          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 741          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 742          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 743          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 744          _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 745          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 746             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 747                                 samp->MaxAnisotropy);
 748          }
 749       }
 750
 751       /* remove saved references to the texture objects */
 752       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 753          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 754       }
 755    }
 756
 757    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 758
 759    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 760
 761    _mesa_unlock_context_textures(ctx);
 762 }
 763
 764
 765 /*
 766  * This function is kind of long just because we have to call a lot
 767  * of device driver functions to update device driver state.
 768  *
 769  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 770  * in order to restore GL state.  This isn't terribly efficient but it
 771  * ensures that dirty flags and any derived state gets updated correctly.
 772  * We could at least check if the value to restore equals the current value
 773  * and then skip the Mesa call.
 774  */
 775 void GLAPIENTRY
 776 _mesa_PopAttrib(void)
 777 {
 778    struct gl_attrib_node *attr, *next;
 779    GET_CURRENT_CONTEXT(ctx);
 780    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 781
 782    if (ctx->AttribStackDepth == 0) {
 783       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 784       return;
 785    }
 786
 787    ctx->AttribStackDepth--;
 788    attr = ctx->AttribStack[ctx->AttribStackDepth];
 789
 790    while (attr) {
 791
 792       if (MESA_VERBOSE & VERBOSE_API) {
 793          _mesa_debug(ctx, "glPopAttrib %s\n",
 794                      _mesa_lookup_enum_by_nr(attr->kind));
 795       }
 796
 797       switch (attr->kind) {
 798          case GL_ACCUM_BUFFER_BIT:
 799             {
 800                const struct gl_accum_attrib *accum;
 801                accum = (const struct gl_accum_attrib *) attr->data;
 802                _mesa_ClearAccum(accum->ClearColor[0],
 803                                 accum->ClearColor[1],
 804                                 accum->ClearColor[2],
 805                                 accum->ClearColor[3]);
 806             }
 807             break;
 808          case GL_COLOR_BUFFER_BIT:
 809             {
 810                const struct gl_colorbuffer_attrib *color;
 811
 812                color = (const struct gl_colorbuffer_attrib *) attr->data;
 813                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 814                _mesa_ClearColor(color->ClearColor.f[0],
 815                                 color->ClearColor.f[1],
 816                                 color->ClearColor.f[2],
 817                                 color->ClearColor.f[3]);
 818                _mesa_IndexMask(color->IndexMask);
 819                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 820                                (GLboolean) (color->ColorMask[1] != 0),
 821                                (GLboolean) (color->ColorMask[2] != 0),
 822                                (GLboolean) (color->ColorMask[3] != 0));
 823                _mesa_DrawBuffer(color->DrawBuffer);
 824                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 825                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
 826                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 827                   _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 828                }
 829                /* set same blend modes for all buffers */
 830                _mesa_BlendFuncSeparateEXT(color->SrcRGB,
 831                                           color->DstRGB,
 832                                           color->SrcA,
 833                                           color->DstA);
 834                /* This special case is because glBlendEquationSeparateEXT
 835                 * cannot take GL_LOGIC_OP as a parameter.
 836                 */
 837                if (color->EquationRGB == color->EquationA) {
 838                   _mesa_BlendEquation(color->EquationRGB);
 839                }
 840                else {
 841                   _mesa_BlendEquationSeparateEXT(
 842                                               color->EquationRGB,
 843                                               color->EquationA);
 844                }
 845                _mesa_BlendColor(color->BlendColorUnclamped[0],
 846                                 color->BlendColorUnclamped[1],
 847                                 color->BlendColorUnclamped[2],
 848                                 color->BlendColorUnclamped[3]);
 849                _mesa_LogicOp(color->LogicOp);
 850                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 851                                 color->ColorLogicOpEnabled);
 852                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 853                                 color->IndexLogicOpEnabled);
 854                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 855                _mesa_ClampColorARB(GL_CLAMP_FRAGMENT_COLOR_ARB, color->ClampFragmentColor);
 856                _mesa_ClampColorARB(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
 857             }
 858             break;
 859          case GL_CURRENT_BIT:
 860             FLUSH_CURRENT( ctx, 0 );
 861             memcpy( &ctx->Current, attr->data,
 862                     sizeof(struct gl_current_attrib) );
 863             break;
 864          case GL_DEPTH_BUFFER_BIT:
 865             {
 866                const struct gl_depthbuffer_attrib *depth;
 867                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 868                _mesa_DepthFunc(depth->Func);
 869                _mesa_ClearDepth(depth->Clear);
 870                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 871                _mesa_DepthMask(depth->Mask);
 872             }
 873             break;
 874          case GL_ENABLE_BIT:
 875             {
 876                const struct gl_enable_attrib *enable;
 877                enable = (const struct gl_enable_attrib *) attr->data;
 878                pop_enable_group(ctx, enable);
 879                ctx->NewState |= _NEW_ALL;
 880             }
 881             break;
 882          case GL_EVAL_BIT:
 883             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 884             ctx->NewState |= _NEW_EVAL;
 885             break;
 886          case GL_FOG_BIT:
 887             {
 888                const struct gl_fog_attrib *fog;
 889                fog = (const struct gl_fog_attrib *) attr->data;
 890                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 891                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 892                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 893                _mesa_Fogf(GL_FOG_START, fog->Start);
 894                _mesa_Fogf(GL_FOG_END, fog->End);
 895                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
 896                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
 897             }
 898             break;
 899          case GL_HINT_BIT:
 900             {
 901                const struct gl_hint_attrib *hint;
 902                hint = (const struct gl_hint_attrib *) attr->data;
 903                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
 904                           hint->PerspectiveCorrection );
 905                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
 906                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
 907                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
 908                _mesa_Hint(GL_FOG_HINT, hint->Fog);
 909                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
 910                           hint->ClipVolumeClipping);
 911                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
 912                           hint->TextureCompression);
 913             }
 914             break;
 915          case GL_LIGHTING_BIT:
 916             {
 917                GLuint i;
 918                const struct gl_light_attrib *light;
 919                light = (const struct gl_light_attrib *) attr->data;
 920                /* lighting enable */
 921                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
 922                /* per-light state */
 923                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
 924                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
 925
 926                for (i = 0; i < ctx->Const.MaxLights; i++) {
 927                   const struct gl_light *l = &light->Light[i];
 928                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
 929                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
 930                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
 931                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
 932                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
 933                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
 934                   {
 935                      GLfloat p[4] = { 0 };
 936                      p[0] = l->SpotExponent;
 937                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
 938                   }
 939                   {
 940                      GLfloat p[4] = { 0 };
 941                      p[0] = l->SpotCutoff;
 942                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
 943                   }
 944                   {
 945                      GLfloat p[4] = { 0 };
 946                      p[0] = l->ConstantAttenuation;
 947                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
 948                   }
 949                   {
 950                      GLfloat p[4] = { 0 };
 951                      p[0] = l->LinearAttenuation;
 952                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
 953                   }
 954                   {
 955                      GLfloat p[4] = { 0 };
 956                      p[0] = l->QuadraticAttenuation;
 957                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
 958                   }
 959                }
 960                /* light model */
 961                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
 962                                   light->Model.Ambient);
 963                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
 964                                  (GLfloat) light->Model.LocalViewer);
 965                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
 966                                  (GLfloat) light->Model.TwoSide);
 967                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
 968                                  (GLfloat) light->Model.ColorControl);
 969                /* shade model */
 970                _mesa_ShadeModel(light->ShadeModel);
 971                /* color material */
 972                _mesa_ColorMaterial(light->ColorMaterialFace,
 973                                    light->ColorMaterialMode);
 974                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
 975                                 light->ColorMaterialEnabled);
 976                /* materials */
 977                memcpy(&ctx->Light.Material, &light->Material,
 978                       sizeof(struct gl_material));
 979                _mesa_ClampColorARB(GL_CLAMP_VERTEX_COLOR_ARB, light->ClampVertexColor);
 980             }
 981             break;
 982          case GL_LINE_BIT:
 983             {
 984                const struct gl_line_attrib *line;
 985                line = (const struct gl_line_attrib *) attr->data;
 986                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
 987                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
 988                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
 989                _mesa_LineWidth(line->Width);
 990             }
 991             break;
 992          case GL_LIST_BIT:
 993             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
 994             break;
 995          case GL_PIXEL_MODE_BIT:
 996             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
 997             /* XXX what other pixel state needs to be set by function calls? */
 998             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
 999             ctx->NewState |= _NEW_PIXEL;
1000             break;
1001          case GL_POINT_BIT:
1002             {
1003                const struct gl_point_attrib *point;
1004                point = (const struct gl_point_attrib *) attr->data;
1005                _mesa_PointSize(point->Size);
1006                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1007                if (ctx->Extensions.EXT_point_parameters) {
1008                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1009                                          point->Params);
1010                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1011                                         point->MinSize);
1012                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1013                                         point->MaxSize);
1014                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1015                                         point->Threshold);
1016                }
1017                if (ctx->Extensions.NV_point_sprite
1018                    || ctx->Extensions.ARB_point_sprite) {
1019                   GLuint u;
1020                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1021                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1022                                    (GLint) point->CoordReplace[u]);
1023                   }
1024                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1025                   if (ctx->Extensions.NV_point_sprite)
1026                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1027                                            ctx->Point.SpriteRMode);
1028                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1029                                         (GLfloat)ctx->Point.SpriteOrigin);
1030                }
1031             }
1032             break;
1033          case GL_POLYGON_BIT:
1034             {
1035                const struct gl_polygon_attrib *polygon;
1036                polygon = (const struct gl_polygon_attrib *) attr->data;
1037                _mesa_CullFace(polygon->CullFaceMode);
1038                _mesa_FrontFace(polygon->FrontFace);
1039                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1040                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1041                _mesa_PolygonOffset(polygon->OffsetFactor,
1042                                    polygon->OffsetUnits);
1043                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1044                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1045                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1046                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1047                                 polygon->OffsetPoint);
1048                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1049                                 polygon->OffsetLine);
1050                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1051                                 polygon->OffsetFill);
1052             }
1053             break;
1054          case GL_POLYGON_STIPPLE_BIT:
1055             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1056             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1057             if (ctx->Driver.PolygonStipple)
1058                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1059             break;
1060          case GL_SCISSOR_BIT:
1061             {
1062                const struct gl_scissor_attrib *scissor;
1063                scissor = (const struct gl_scissor_attrib *) attr->data;
1064                _mesa_Scissor(scissor->X, scissor->Y,
1065                              scissor->Width, scissor->Height);
1066                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1067             }
1068             break;
1069          case GL_STENCIL_BUFFER_BIT:
1070             {
1071                const struct gl_stencil_attrib *stencil;
1072                stencil = (const struct gl_stencil_attrib *) attr->data;
1073                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1074                _mesa_ClearStencil(stencil->Clear);
1075                if (ctx->Extensions.EXT_stencil_two_side) {
1076                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1077                                    stencil->TestTwoSide);
1078                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1079                                              ? GL_BACK : GL_FRONT);
1080                }
1081                /* front state */
1082                _mesa_StencilFuncSeparate(GL_FRONT,
1083                                          stencil->Function[0],
1084                                          stencil->Ref[0],
1085                                          stencil->ValueMask[0]);
1086                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1087                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1088                                        stencil->ZFailFunc[0],
1089                                        stencil->ZPassFunc[0]);
1090                /* back state */
1091                _mesa_StencilFuncSeparate(GL_BACK,
1092                                          stencil->Function[1],
1093                                          stencil->Ref[1],
1094                                          stencil->ValueMask[1]);
1095                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1096                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1097                                        stencil->ZFailFunc[1],
1098                                        stencil->ZPassFunc[1]);
1099             }
1100             break;
1101          case GL_TRANSFORM_BIT:
1102             {
1103                GLuint i;
1104                const struct gl_transform_attrib *xform;
1105                xform = (const struct gl_transform_attrib *) attr->data;
1106                _mesa_MatrixMode(xform->MatrixMode);
1107                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1108                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1109
1110                /* restore clip planes */
1111                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1112                   const GLuint mask = 1 << i;
1113                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1114                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1115                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1116                                    !!(xform->ClipPlanesEnabled & mask));
1117                   if (ctx->Driver.ClipPlane)
1118                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1119                }
1120
1121                /* normalize/rescale */
1122                if (xform->Normalize != ctx->Transform.Normalize)
1123                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1124                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1125                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1126                                    ctx->Transform.RescaleNormals);
1127             }
1128             break;
1129          case GL_TEXTURE_BIT:
1130             /* Take care of texture object reference counters */
1131             {
1132                struct texture_state *texstate
1133                   = (struct texture_state *) attr->data;
1134                pop_texture_group(ctx, texstate);
1135                ctx->NewState |= _NEW_TEXTURE;
1136             }
1137             break;
1138          case GL_VIEWPORT_BIT:
1139             {
1140                const struct gl_viewport_attrib *vp;
1141                vp = (const struct gl_viewport_attrib *) attr->data;
1142                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1143                _mesa_DepthRange(vp->Near, vp->Far);
1144             }
1145             break;
1146          case GL_MULTISAMPLE_BIT_ARB:
1147             {
1148                const struct gl_multisample_attrib *ms;
1149                ms = (const struct gl_multisample_attrib *) attr->data;
1150
1151                TEST_AND_UPDATE(ctx->Multisample.Enabled,
1152                                ms->Enabled,
1153                                GL_MULTISAMPLE);
1154
1155                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
1156                                ms->SampleCoverage,
1157                                GL_SAMPLE_COVERAGE);
1158
1159                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
1160                                ms->SampleAlphaToCoverage,
1161                                GL_SAMPLE_ALPHA_TO_COVERAGE);
1162
1163                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
1164                                ms->SampleAlphaToOne,
1165                                GL_SAMPLE_ALPHA_TO_ONE);
1166
1167                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1168                                        ms->SampleCoverageInvert);
1169             }
1170             break;
1171
1172          default:
1173             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1174             break;
1175       }
1176
1177       next = attr->next;
1178       FREE( attr->data );
1179       FREE( attr );
1180       attr = next;
1181    }
1182 }
1183
1184
1185 /**
1186  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1187  * object refcounts.
1188  */
1189 static void
1190 copy_pixelstore(struct gl_context *ctx,
1191                 struct gl_pixelstore_attrib *dst,
1192                 const struct gl_pixelstore_attrib *src)
1193 {
1194    dst->Alignment = src->Alignment;
1195    dst->RowLength = src->RowLength;
1196    dst->SkipPixels = src->SkipPixels;
1197    dst->SkipRows = src->SkipRows;
1198    dst->ImageHeight = src->ImageHeight;
1199    dst->SkipImages = src->SkipImages;
1200    dst->SwapBytes = src->SwapBytes;
1201    dst->LsbFirst = src->LsbFirst;
1202    dst->Invert = src->Invert;
1203    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1204 }
1205
1206
1207 #define GL_CLIENT_PACK_BIT (1<<20)
1208 #define GL_CLIENT_UNPACK_BIT (1<<21)
1209
1210 /**
1211  * Copy gl_array_object from src to dest.
1212  * 'dest' must be in an initialized state.
1213  */
1214 static void
1215 copy_array_object(struct gl_context *ctx,
1216                   struct gl_array_object *dest,
1217                   struct gl_array_object *src)
1218 {
1219    GLuint i;
1220
1221    /* skip Name */
1222    /* skip RefCount */
1223
1224    /* In theory must be the same anyway, but on recreate make sure it matches */
1225    dest->ARBsemantics = src->ARBsemantics;
1226
1227    for (i = 0; i < Elements(src->VertexAttrib); i++)
1228       _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1229
1230    /* _Enabled must be the same than on push */
1231    dest->_Enabled = src->_Enabled;
1232    dest->_MaxElement = src->_MaxElement;
1233 }
1234
1235 /**
1236  * Copy gl_array_attrib from src to dest.
1237  * 'dest' must be in an initialized state.
1238  */
1239 static void
1240 copy_array_attrib(struct gl_context *ctx,
1241                   struct gl_array_attrib *dest,
1242                   struct gl_array_attrib *src,
1243                   bool vbo_deleted)
1244 {
1245    /* skip ArrayObj */
1246    /* skip DefaultArrayObj, Objects */
1247    dest->ActiveTexture = src->ActiveTexture;
1248    dest->LockFirst = src->LockFirst;
1249    dest->LockCount = src->LockCount;
1250    /* skip NewState */
1251    /* skip RebindArrays */
1252
1253    if (!vbo_deleted)
1254       copy_array_object(ctx, dest->ArrayObj, src->ArrayObj);
1255
1256    /* skip ArrayBufferObj */
1257    /* skip ElementArrayBufferObj */
1258 }
1259
1260 /**
1261  * Save the content of src to dest.
1262  */
1263 static void
1264 save_array_attrib(struct gl_context *ctx,
1265                   struct gl_array_attrib *dest,
1266                   struct gl_array_attrib *src)
1267 {
1268    /* Set the Name, needed for restore, but do never overwrite.
1269     * Needs to match value in the object hash. */
1270    dest->ArrayObj->Name = src->ArrayObj->Name;
1271    /* And copy all of the rest. */
1272    copy_array_attrib(ctx, dest, src, false);
1273
1274    /* Just reference them here */
1275    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1276                                  src->ArrayBufferObj);
1277    _mesa_reference_buffer_object(ctx, &dest->ArrayObj->ElementArrayBufferObj,
1278                                  src->ArrayObj->ElementArrayBufferObj);
1279 }
1280
1281 /**
1282  * Restore the content of src to dest.
1283  */
1284 static void
1285 restore_array_attrib(struct gl_context *ctx,
1286                      struct gl_array_attrib *dest,
1287                      struct gl_array_attrib *src)
1288 {
1289    /* The ARB_vertex_array_object spec says:
1290     *
1291     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1292     *     if array is not a name returned from a previous call to
1293     *     GenVertexArrays, or if such a name has since been deleted with
1294     *     DeleteVertexArrays."
1295     *
1296     * Therefore popping a deleted VAO cannot magically recreate it.
1297     *
1298     * The semantics of objects created using APPLE_vertex_array_objects behave
1299     * differently.  These objects expect to be recreated by pop.  Alas.
1300     */
1301    const bool arb_vao = (src->ArrayObj->Name != 0
1302                          && src->ArrayObj->ARBsemantics);
1303
1304    if (arb_vao && !_mesa_IsVertexArrayAPPLE(src->ArrayObj->Name))
1305       return;
1306
1307    _mesa_BindVertexArrayAPPLE(src->ArrayObj->Name);
1308
1309    /* Restore or recreate the buffer objects by the names ... */
1310    if (!arb_vao
1311        || src->ArrayBufferObj->Name == 0
1312        || _mesa_IsBufferARB(src->ArrayBufferObj->Name)) {
1313       /* ... and restore its content */
1314       copy_array_attrib(ctx, dest, src, false);
1315
1316       _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1317                           src->ArrayBufferObj->Name);
1318    } else {
1319       copy_array_attrib(ctx, dest, src, true);
1320    }
1321
1322    if (!arb_vao
1323        || src->ArrayObj->ElementArrayBufferObj->Name == 0
1324        || _mesa_IsBufferARB(src->ArrayObj->ElementArrayBufferObj->Name))
1325       _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1326                           src->ArrayObj->ElementArrayBufferObj->Name);
1327
1328    /* Better safe than sorry?! */
1329    dest->RebindArrays = GL_TRUE;
1330
1331    /* FIXME: Should some bits in ctx->Array->NewState also be set
1332     * FIXME: here?  It seems like it should be set to inclusive-or
1333     * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1334     * ... just do it.
1335     */
1336    dest->NewState |= src->ArrayObj->_Enabled | dest->ArrayObj->_Enabled;
1337 }
1338
1339 /**
1340  * init/alloc the fields of 'attrib'.
1341  * Needs to the init part matching free_array_attrib_data below.
1342  */
1343 static void
1344 init_array_attrib_data(struct gl_context *ctx,
1345                        struct gl_array_attrib *attrib)
1346 {
1347    /* Get a non driver gl_array_object. */
1348    attrib->ArrayObj = CALLOC_STRUCT( gl_array_object );
1349    _mesa_initialize_array_object(ctx, attrib->ArrayObj, 0);
1350 }
1351
1352 /**
1353  * Free/unreference the fields of 'attrib' but don't delete it (that's
1354  * done later in the calling code).
1355  * Needs to the cleanup part matching init_array_attrib_data above.
1356  */
1357 static void
1358 free_array_attrib_data(struct gl_context *ctx,
1359                        struct gl_array_attrib *attrib)
1360 {
1361    /* We use a non driver array object, so don't just unref since we would
1362     * end up using the drivers DeleteArrayObject function for deletion. */
1363    _mesa_delete_array_object(ctx, attrib->ArrayObj);
1364    attrib->ArrayObj = 0;
1365    _mesa_reference_buffer_object(ctx, &attrib->ArrayBufferObj, NULL);
1366 }
1367
1368
1369 void GLAPIENTRY
1370 _mesa_PushClientAttrib(GLbitfield mask)
1371 {
1372    struct gl_attrib_node *head;
1373
1374    GET_CURRENT_CONTEXT(ctx);
1375    ASSERT_OUTSIDE_BEGIN_END(ctx);
1376
1377    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1378       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1379       return;
1380    }
1381
1382    /* Build linked list of attribute nodes which save all attribute
1383     * groups specified by the mask.
1384     */
1385    head = NULL;
1386
1387    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1388       struct gl_pixelstore_attrib *attr;
1389       /* packing attribs */
1390       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1391       copy_pixelstore(ctx, attr, &ctx->Pack);
1392       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1393       /* unpacking attribs */
1394       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1395       copy_pixelstore(ctx, attr, &ctx->Unpack);
1396       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1397    }
1398
1399    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1400       struct gl_array_attrib *attr;
1401       attr = CALLOC_STRUCT( gl_array_attrib );
1402       init_array_attrib_data(ctx, attr);
1403       save_array_attrib(ctx, attr, &ctx->Array);
1404       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1405    }
1406
1407    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1408    ctx->ClientAttribStackDepth++;
1409 }
1410
1411
1412
1413
1414 void GLAPIENTRY
1415 _mesa_PopClientAttrib(void)
1416 {
1417    struct gl_attrib_node *node, *next;
1418
1419    GET_CURRENT_CONTEXT(ctx);
1420    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1421
1422    if (ctx->ClientAttribStackDepth == 0) {
1423       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1424       return;
1425    }
1426
1427    ctx->ClientAttribStackDepth--;
1428    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1429
1430    while (node) {
1431       switch (node->kind) {
1432          case GL_CLIENT_PACK_BIT:
1433             {
1434                struct gl_pixelstore_attrib *store =
1435                   (struct gl_pixelstore_attrib *) node->data;
1436                copy_pixelstore(ctx, &ctx->Pack, store);
1437                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1438             }
1439             ctx->NewState |= _NEW_PACKUNPACK;
1440             break;
1441          case GL_CLIENT_UNPACK_BIT:
1442             {
1443                struct gl_pixelstore_attrib *store =
1444                   (struct gl_pixelstore_attrib *) node->data;
1445                copy_pixelstore(ctx, &ctx->Unpack, store);
1446                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1447             }
1448             ctx->NewState |= _NEW_PACKUNPACK;
1449             break;
1450          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1451             struct gl_array_attrib * attr =
1452               (struct gl_array_attrib *) node->data;
1453             restore_array_attrib(ctx, &ctx->Array, attr);
1454             free_array_attrib_data(ctx, attr);
1455             ctx->NewState |= _NEW_ARRAY;
1456             break;
1457          }
1458          default:
1459             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1460             break;
1461       }
1462
1463       next = node->next;
1464       FREE( node->data );
1465       FREE( node );
1466       node = next;
1467    }
1468 }
1469
1470
1471 void
1472 _mesa_init_attrib_dispatch(struct _glapi_table *disp)
1473 {
1474    SET_PopAttrib(disp, _mesa_PopAttrib);
1475    SET_PushAttrib(disp, _mesa_PushAttrib);
1476    SET_PopClientAttrib(disp, _mesa_PopClientAttrib);
1477    SET_PushClientAttrib(disp, _mesa_PushClientAttrib);
1478 }
1479
1480
1481 #endif /* FEATURE_attrib_stack */
1482
1483
1484 /**
1485  * Free any attribute state data that might be attached to the context.
1486  */
1487 void
1488 _mesa_free_attrib_data(struct gl_context *ctx)
1489 {
1490    while (ctx->AttribStackDepth > 0) {
1491       struct gl_attrib_node *attr, *next;
1492
1493       ctx->AttribStackDepth--;
1494       attr = ctx->AttribStack[ctx->AttribStackDepth];
1495
1496       while (attr) {
1497          if (attr->kind == GL_TEXTURE_BIT) {
1498             struct texture_state *texstate = (struct texture_state*)attr->data;
1499             GLuint u, tgt;
1500             /* clear references to the saved texture objects */
1501             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1502                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1503                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1504                }
1505             }
1506             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1507          }
1508          else {
1509             /* any other chunks of state that requires special handling? */
1510          }
1511
1512          next = attr->next;
1513          free(attr->data);
1514          free(attr);
1515          attr = next;
1516       }
1517    }
1518 }
1519
1520
1521 void _mesa_init_attrib( struct gl_context *ctx )
1522 {
1523    /* Renderer and client attribute stacks */
1524    ctx->AttribStackDepth = 0;
1525    ctx->ClientAttribStackDepth = 0;
1526 }