src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "glheader.h"
  27 #include "imports.h"
  28 #include "accum.h"
  29 #include "arrayobj.h"
  30 #include "attrib.h"
  31 #include "blend.h"
  32 #include "buffers.h"
  33 #include "bufferobj.h"
  34 #include "clear.h"
  35 #include "colormac.h"
  36 #include "context.h"
  37 #include "depth.h"
  38 #include "enable.h"
  39 #include "enums.h"
  40 #include "fog.h"
  41 #include "hint.h"
  42 #include "light.h"
  43 #include "lines.h"
  44 #include "macros.h"
  45 #include "matrix.h"
  46 #include "mfeatures.h"
  47 #include "multisample.h"
  48 #include "points.h"
  49 #include "polygon.h"
  50 #include "scissor.h"
  51 #include "stencil.h"
  52 #include "texenv.h"
  53 #include "texgen.h"
  54 #include "texobj.h"
  55 #include "texparam.h"
  56 #include "texstate.h"
  57 #include "varray.h"
  58 #include "viewport.h"
  59 #include "mtypes.h"
  60 #include "main/dispatch.h"
  61
  62
  63 /**
  64  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  65  */
  66 struct gl_enable_attrib
  67 {
  68    GLboolean AlphaTest;
  69    GLboolean AutoNormal;
  70    GLboolean Blend;
  71    GLbitfield ClipPlanes;
  72    GLboolean ColorMaterial;
  73    GLboolean CullFace;
  74    GLboolean DepthClamp;
  75    GLboolean DepthTest;
  76    GLboolean Dither;
  77    GLboolean Fog;
  78    GLboolean Light[MAX_LIGHTS];
  79    GLboolean Lighting;
  80    GLboolean LineSmooth;
  81    GLboolean LineStipple;
  82    GLboolean IndexLogicOp;
  83    GLboolean ColorLogicOp;
  84
  85    GLboolean Map1Color4;
  86    GLboolean Map1Index;
  87    GLboolean Map1Normal;
  88    GLboolean Map1TextureCoord1;
  89    GLboolean Map1TextureCoord2;
  90    GLboolean Map1TextureCoord3;
  91    GLboolean Map1TextureCoord4;
  92    GLboolean Map1Vertex3;
  93    GLboolean Map1Vertex4;
  94    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
  95    GLboolean Map2Color4;
  96    GLboolean Map2Index;
  97    GLboolean Map2Normal;
  98    GLboolean Map2TextureCoord1;
  99    GLboolean Map2TextureCoord2;
 100    GLboolean Map2TextureCoord3;
 101    GLboolean Map2TextureCoord4;
 102    GLboolean Map2Vertex3;
 103    GLboolean Map2Vertex4;
 104    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 105
 106    GLboolean Normalize;
 107    GLboolean PixelTexture;
 108    GLboolean PointSmooth;
 109    GLboolean PolygonOffsetPoint;
 110    GLboolean PolygonOffsetLine;
 111    GLboolean PolygonOffsetFill;
 112    GLboolean PolygonSmooth;
 113    GLboolean PolygonStipple;
 114    GLboolean RescaleNormals;
 115    GLboolean Scissor;
 116    GLboolean Stencil;
 117    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 118    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 119    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 120    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 121    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 122    GLboolean SampleCoverageInvert;    /* 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    /* SGI_texture_color_table */
 129    GLboolean TextureColorTable[MAX_TEXTURE_UNITS];
 130
 131    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 132    GLboolean VertexProgram;
 133    GLboolean VertexProgramPointSize;
 134    GLboolean VertexProgramTwoSide;
 135
 136    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 137    GLboolean PointSprite;
 138    GLboolean FragmentShaderATI;
 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
 171
 172 #if FEATURE_attrib_stack
 173
 174
 175 /**
 176  * Allocate new attribute node of given type/kind.  Attach payload data.
 177  * Insert it into the linked list named by 'head'.
 178  */
 179 static void
 180 save_attrib_data(struct gl_attrib_node **head,
 181                  GLbitfield kind, void *payload)
 182 {
 183    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 184    if (n) {
 185       n->kind = kind;
 186       n->data = payload;
 187       /* insert at head */
 188       n->next = *head;
 189       *head = n;
 190    }
 191    else {
 192       /* out of memory! */
 193    }
 194 }
 195
 196
 197 void GLAPIENTRY
 198 _mesa_PushAttrib(GLbitfield mask)
 199 {
 200    struct gl_attrib_node *head;
 201
 202    GET_CURRENT_CONTEXT(ctx);
 203    ASSERT_OUTSIDE_BEGIN_END(ctx);
 204
 205    if (MESA_VERBOSE & VERBOSE_API)
 206       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 207
 208    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 209       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 210       return;
 211    }
 212
 213    /* Build linked list of attribute nodes which save all attribute */
 214    /* groups specified by the mask. */
 215    head = NULL;
 216
 217    if (mask & GL_ACCUM_BUFFER_BIT) {
 218       struct gl_accum_attrib *attr;
 219       attr = MALLOC_STRUCT( gl_accum_attrib );
 220       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 221       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 222    }
 223
 224    if (mask & GL_COLOR_BUFFER_BIT) {
 225       GLuint i;
 226       struct gl_colorbuffer_attrib *attr;
 227       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 228       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 229       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 230       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 231          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 232       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 233    }
 234
 235    if (mask & GL_CURRENT_BIT) {
 236       struct gl_current_attrib *attr;
 237       FLUSH_CURRENT( ctx, 0 );
 238       attr = MALLOC_STRUCT( gl_current_attrib );
 239       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 240       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 241    }
 242
 243    if (mask & GL_DEPTH_BUFFER_BIT) {
 244       struct gl_depthbuffer_attrib *attr;
 245       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 246       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 247       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 248    }
 249
 250    if (mask & GL_ENABLE_BIT) {
 251       struct gl_enable_attrib *attr;
 252       GLuint i;
 253       attr = MALLOC_STRUCT( gl_enable_attrib );
 254       /* Copy enable flags from all other attributes into the enable struct. */
 255       attr->AlphaTest = ctx->Color.AlphaEnabled;
 256       attr->AutoNormal = ctx->Eval.AutoNormal;
 257       attr->Blend = ctx->Color.BlendEnabled;
 258       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 259       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 260       attr->CullFace = ctx->Polygon.CullFlag;
 261       attr->DepthClamp = ctx->Transform.DepthClamp;
 262       attr->DepthTest = ctx->Depth.Test;
 263       attr->Dither = ctx->Color.DitherFlag;
 264       attr->Fog = ctx->Fog.Enabled;
 265       for (i = 0; i < ctx->Const.MaxLights; i++) {
 266          attr->Light[i] = ctx->Light.Light[i].Enabled;
 267       }
 268       attr->Lighting = ctx->Light.Enabled;
 269       attr->LineSmooth = ctx->Line.SmoothFlag;
 270       attr->LineStipple = ctx->Line.StippleFlag;
 271       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 272       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 273       attr->Map1Color4 = ctx->Eval.Map1Color4;
 274       attr->Map1Index = ctx->Eval.Map1Index;
 275       attr->Map1Normal = ctx->Eval.Map1Normal;
 276       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 277       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 278       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 279       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 280       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 281       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 282       memcpy(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 283       attr->Map2Color4 = ctx->Eval.Map2Color4;
 284       attr->Map2Index = ctx->Eval.Map2Index;
 285       attr->Map2Normal = ctx->Eval.Map2Normal;
 286       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 287       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 288       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 289       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 290       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 291       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 292       memcpy(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 293       attr->Normalize = ctx->Transform.Normalize;
 294       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 295       attr->PointSmooth = ctx->Point.SmoothFlag;
 296       attr->PointSprite = ctx->Point.PointSprite;
 297       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 298       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 299       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 300       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 301       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 302       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 303       attr->Scissor = ctx->Scissor.Enabled;
 304       attr->Stencil = ctx->Stencil.Enabled;
 305       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 306       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 307       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 308       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 309       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 310       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 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          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 315       }
 316       /* GL_NV_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
 323    if (mask & GL_EVAL_BIT) {
 324       struct gl_eval_attrib *attr;
 325       attr = MALLOC_STRUCT( gl_eval_attrib );
 326       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 327       save_attrib_data(&head, GL_EVAL_BIT, attr);
 328    }
 329
 330    if (mask & GL_FOG_BIT) {
 331       struct gl_fog_attrib *attr;
 332       attr = MALLOC_STRUCT( gl_fog_attrib );
 333       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 334       save_attrib_data(&head, GL_FOG_BIT, attr);
 335    }
 336
 337    if (mask & GL_HINT_BIT) {
 338       struct gl_hint_attrib *attr;
 339       attr = MALLOC_STRUCT( gl_hint_attrib );
 340       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 341       save_attrib_data(&head, GL_HINT_BIT, attr);
 342    }
 343
 344    if (mask & GL_LIGHTING_BIT) {
 345       struct gl_light_attrib *attr;
 346       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 347       attr = MALLOC_STRUCT( gl_light_attrib );
 348       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 349       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 350    }
 351
 352    if (mask & GL_LINE_BIT) {
 353       struct gl_line_attrib *attr;
 354       attr = MALLOC_STRUCT( gl_line_attrib );
 355       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 356       save_attrib_data(&head, GL_LINE_BIT, attr);
 357    }
 358
 359    if (mask & GL_LIST_BIT) {
 360       struct gl_list_attrib *attr;
 361       attr = MALLOC_STRUCT( gl_list_attrib );
 362       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 363       save_attrib_data(&head, GL_LIST_BIT, attr);
 364    }
 365
 366    if (mask & GL_PIXEL_MODE_BIT) {
 367       struct gl_pixel_attrib *attr;
 368       attr = MALLOC_STRUCT( gl_pixel_attrib );
 369       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 370       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 371       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 372       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 373    }
 374
 375    if (mask & GL_POINT_BIT) {
 376       struct gl_point_attrib *attr;
 377       attr = MALLOC_STRUCT( gl_point_attrib );
 378       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 379       save_attrib_data(&head, GL_POINT_BIT, attr);
 380    }
 381
 382    if (mask & GL_POLYGON_BIT) {
 383       struct gl_polygon_attrib *attr;
 384       attr = MALLOC_STRUCT( gl_polygon_attrib );
 385       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 386       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 387    }
 388
 389    if (mask & GL_POLYGON_STIPPLE_BIT) {
 390       GLuint *stipple;
 391       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 392       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 393       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 394    }
 395
 396    if (mask & GL_SCISSOR_BIT) {
 397       struct gl_scissor_attrib *attr;
 398       attr = MALLOC_STRUCT( gl_scissor_attrib );
 399       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 400       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 401    }
 402
 403    if (mask & GL_STENCIL_BUFFER_BIT) {
 404       struct gl_stencil_attrib *attr;
 405       attr = MALLOC_STRUCT( gl_stencil_attrib );
 406       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 407       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 408    }
 409
 410    if (mask & GL_TEXTURE_BIT) {
 411       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 412       GLuint u, tex;
 413
 414       if (!texstate) {
 415          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 416          goto end;
 417       }
 418
 419       _mesa_lock_context_textures(ctx);
 420
 421       /* copy/save the bulk of texture state here */
 422       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 423
 424       /* Save references to the currently bound texture objects so they don't
 425        * accidentally get deleted while referenced in the attribute stack.
 426        */
 427       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 428          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 429             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 430                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 431          }
 432       }
 433
 434       /* copy state/contents of the currently bound texture objects */
 435       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 436          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 437             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 438                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 439          }
 440       }
 441
 442       _mesa_unlock_context_textures(ctx);
 443
 444       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 445    }
 446
 447    if (mask & GL_TRANSFORM_BIT) {
 448       struct gl_transform_attrib *attr;
 449       attr = MALLOC_STRUCT( gl_transform_attrib );
 450       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 451       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 452    }
 453
 454    if (mask & GL_VIEWPORT_BIT) {
 455       struct gl_viewport_attrib *attr;
 456       attr = MALLOC_STRUCT( gl_viewport_attrib );
 457       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 458       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 459    }
 460
 461    /* GL_ARB_multisample */
 462    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 463       struct gl_multisample_attrib *attr;
 464       attr = MALLOC_STRUCT( gl_multisample_attrib );
 465       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 466       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 467    }
 468
 469 end:
 470    ctx->AttribStack[ctx->AttribStackDepth] = head;
 471    ctx->AttribStackDepth++;
 472 }
 473
 474
 475
 476 static void
 477 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 478 {
 479    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 480    GLuint i;
 481
 482 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 483         if ((VALUE) != (NEWVALUE)) {                    \
 484            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 485         }
 486
 487    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 488    if (ctx->Color.BlendEnabled != enable->Blend) {
 489       if (ctx->Extensions.EXT_draw_buffers2) {
 490          GLuint i;
 491          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 492             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 493          }
 494       }
 495       else {
 496          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 497       }
 498    }
 499
 500    for (i=0;i<MAX_CLIP_PLANES;i++) {
 501       const GLuint mask = 1 << i;
 502       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 503           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 504                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 505    }
 506
 507    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 508                    GL_COLOR_MATERIAL);
 509    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 510    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 511                    GL_DEPTH_CLAMP);
 512    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 513    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 514    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 515    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 516    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 517    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 518                    GL_LINE_STIPPLE);
 519    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 520                    GL_INDEX_LOGIC_OP);
 521    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 522                    GL_COLOR_LOGIC_OP);
 523
 524    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 525    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 526    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 527    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 528                    GL_MAP1_TEXTURE_COORD_1);
 529    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 530                    GL_MAP1_TEXTURE_COORD_2);
 531    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 532                    GL_MAP1_TEXTURE_COORD_3);
 533    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 534                    GL_MAP1_TEXTURE_COORD_4);
 535    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 536                    GL_MAP1_VERTEX_3);
 537    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 538                    GL_MAP1_VERTEX_4);
 539    for (i = 0; i < 16; i++) {
 540       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 541                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 542    }
 543
 544    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 545    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 546    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 547    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 548                    GL_MAP2_TEXTURE_COORD_1);
 549    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 550                    GL_MAP2_TEXTURE_COORD_2);
 551    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 552                    GL_MAP2_TEXTURE_COORD_3);
 553    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 554                    GL_MAP2_TEXTURE_COORD_4);
 555    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 556                    GL_MAP2_VERTEX_3);
 557    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 558                    GL_MAP2_VERTEX_4);
 559    for (i = 0; i < 16; i++) {
 560       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 561                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 562    }
 563
 564    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 565    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 566    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 567                    GL_RESCALE_NORMAL_EXT);
 568    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 569                    enable->RasterPositionUnclipped,
 570                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 571    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 572                    GL_POINT_SMOOTH);
 573    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 574       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 575                       GL_POINT_SPRITE_NV);
 576    }
 577    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 578                    GL_POLYGON_OFFSET_POINT);
 579    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 580                    GL_POLYGON_OFFSET_LINE);
 581    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 582                    GL_POLYGON_OFFSET_FILL);
 583    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 584                    GL_POLYGON_SMOOTH);
 585    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 586                    GL_POLYGON_STIPPLE);
 587    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 588    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 589    if (ctx->Extensions.EXT_stencil_two_side) {
 590       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 591    }
 592    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 593                    GL_MULTISAMPLE_ARB);
 594    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 595                    enable->SampleAlphaToCoverage,
 596                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 597    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 598                    enable->SampleAlphaToOne,
 599                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 600    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 601                    enable->SampleCoverage,
 602                    GL_SAMPLE_COVERAGE_ARB);
 603    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 604                    enable->SampleCoverageInvert,
 605                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 606    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 607    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 608                    enable->VertexProgram,
 609                    GL_VERTEX_PROGRAM_ARB);
 610    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 611                    enable->VertexProgramPointSize,
 612                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 613    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 614                    enable->VertexProgramTwoSide,
 615                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 616
 617 #undef TEST_AND_UPDATE
 618
 619    /* texture unit enables */
 620    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 621       const GLbitfield enabled = enable->Texture[i];
 622       const GLbitfield genEnabled = enable->TexGen[i];
 623
 624       if (ctx->Texture.Unit[i].Enabled != enabled) {
 625          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 626
 627          _mesa_set_enable(ctx, GL_TEXTURE_1D,
 628                           (enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 629          _mesa_set_enable(ctx, GL_TEXTURE_2D,
 630                           (enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 631          _mesa_set_enable(ctx, GL_TEXTURE_3D,
 632                           (enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 633          if (ctx->Extensions.NV_texture_rectangle) {
 634             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 635                              (enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 636          }
 637          if (ctx->Extensions.ARB_texture_cube_map) {
 638             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 639                              (enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 640          }
 641          if (ctx->Extensions.MESA_texture_array) {
 642             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 643                            (enabled & TEXTURE_1D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 644             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 645                            (enabled & TEXTURE_2D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 646          }
 647       }
 648
 649       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 650          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 651          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 652                           (genEnabled & S_BIT) ? GL_TRUE : GL_FALSE);
 653          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 654                           (genEnabled & T_BIT) ? GL_TRUE : GL_FALSE);
 655          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 656                           (genEnabled & R_BIT) ? GL_TRUE : GL_FALSE);
 657          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 658                           (genEnabled & Q_BIT) ? GL_TRUE : GL_FALSE);
 659       }
 660
 661       /* GL_SGI_texture_color_table */
 662       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 663    }
 664
 665    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 666 }
 667
 668
 669 /**
 670  * Pop/restore texture attribute/group state.
 671  */
 672 static void
 673 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 674 {
 675    GLuint u;
 676
 677    _mesa_lock_context_textures(ctx);
 678
 679    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 680       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 681       GLuint tgt;
 682
 683       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 684       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 685                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 686       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 687                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 688       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 689                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 690       if (ctx->Extensions.ARB_texture_cube_map) {
 691          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 692                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 693       }
 694       if (ctx->Extensions.NV_texture_rectangle) {
 695          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 696                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 697       }
 698       if (ctx->Extensions.MESA_texture_array) {
 699          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 700                  (unit->Enabled & TEXTURE_1D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 701          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 702                  (unit->Enabled & TEXTURE_2D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 703       }
 704
 705       if (ctx->Extensions.SGI_texture_color_table) {
 706          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 707                           unit->ColorTableEnabled);
 708       }
 709       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 710       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 711       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 712       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 713       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 714       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 715       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 716       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 717       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 718       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 719       /* Eye plane done differently to avoid re-transformation */
 720       {
 721          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 722          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 723          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 724          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 725          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 726          if (ctx->Driver.TexGen) {
 727             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 728             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 729             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 730             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 731          }
 732       }
 733       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 734                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 735       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 736                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 737       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 738                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 739       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 740                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 741       if (ctx->Extensions.EXT_texture_lod_bias) {
 742          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 743                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 744       }
 745       if (ctx->Extensions.EXT_texture_env_combine ||
 746           ctx->Extensions.ARB_texture_env_combine) {
 747          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 748                        unit->Combine.ModeRGB);
 749          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 750                        unit->Combine.ModeA);
 751          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 752                        unit->Combine.SourceRGB[0]);
 753          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 754                        unit->Combine.SourceRGB[1]);
 755          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 756                        unit->Combine.SourceRGB[2]);
 757          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 758                        unit->Combine.SourceA[0]);
 759          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 760                        unit->Combine.SourceA[1]);
 761          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 762                        unit->Combine.SourceA[2]);
 763          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 764                        unit->Combine.OperandRGB[0]);
 765          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 766                        unit->Combine.OperandRGB[1]);
 767          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 768                        unit->Combine.OperandRGB[2]);
 769          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 770                        unit->Combine.OperandA[0]);
 771          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 772                        unit->Combine.OperandA[1]);
 773          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 774                        unit->Combine.OperandA[2]);
 775          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 776                        1 << unit->Combine.ScaleShiftRGB);
 777          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 778                        1 << unit->Combine.ScaleShiftA);
 779       }
 780
 781       /* Restore texture object state for each target */
 782       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 783          const struct gl_texture_object *obj = NULL;
 784          GLenum target;
 785
 786          obj = &texstate->SavedObj[u][tgt];
 787
 788          /* don't restore state for unsupported targets to prevent
 789           * raising GL errors.
 790           */
 791          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 792              !ctx->Extensions.ARB_texture_cube_map) {
 793             continue;
 794          }
 795          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 796                   !ctx->Extensions.NV_texture_rectangle) {
 797             continue;
 798          }
 799          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 800                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 801                   !ctx->Extensions.MESA_texture_array) {
 802             continue;
 803          }
 804
 805          target = obj->Target;
 806
 807          _mesa_BindTexture(target, obj->Name);
 808
 809          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, obj->BorderColor.f);
 810          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 811          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 812          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 813          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 814          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 815          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 816          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 817          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 818          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 819          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 820          if (target != GL_TEXTURE_RECTANGLE_ARB)
 821             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 822          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 823             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 824                                 obj->MaxAnisotropy);
 825          }
 826          if (ctx->Extensions.ARB_shadow_ambient) {
 827             _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
 828                                 obj->CompareFailValue);
 829          }
 830       }
 831
 832       /* remove saved references to the texture objects */
 833       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 834          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 835       }
 836    }
 837
 838    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 839
 840    _mesa_unlock_context_textures(ctx);
 841 }
 842
 843
 844 /*
 845  * This function is kind of long just because we have to call a lot
 846  * of device driver functions to update device driver state.
 847  *
 848  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 849  * in order to restore GL state.  This isn't terribly efficient but it
 850  * ensures that dirty flags and any derived state gets updated correctly.
 851  * We could at least check if the value to restore equals the current value
 852  * and then skip the Mesa call.
 853  */
 854 void GLAPIENTRY
 855 _mesa_PopAttrib(void)
 856 {
 857    struct gl_attrib_node *attr, *next;
 858    GET_CURRENT_CONTEXT(ctx);
 859    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 860
 861    if (ctx->AttribStackDepth == 0) {
 862       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 863       return;
 864    }
 865
 866    ctx->AttribStackDepth--;
 867    attr = ctx->AttribStack[ctx->AttribStackDepth];
 868
 869    while (attr) {
 870
 871       if (MESA_VERBOSE & VERBOSE_API) {
 872          _mesa_debug(ctx, "glPopAttrib %s\n",
 873                      _mesa_lookup_enum_by_nr(attr->kind));
 874       }
 875
 876       switch (attr->kind) {
 877          case GL_ACCUM_BUFFER_BIT:
 878             {
 879                const struct gl_accum_attrib *accum;
 880                accum = (const struct gl_accum_attrib *) attr->data;
 881                _mesa_ClearAccum(accum->ClearColor[0],
 882                                 accum->ClearColor[1],
 883                                 accum->ClearColor[2],
 884                                 accum->ClearColor[3]);
 885             }
 886             break;
 887          case GL_COLOR_BUFFER_BIT:
 888             {
 889                const struct gl_colorbuffer_attrib *color;
 890
 891                color = (const struct gl_colorbuffer_attrib *) attr->data;
 892                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 893                _mesa_ClearColor(color->ClearColor[0],
 894                                 color->ClearColor[1],
 895                                 color->ClearColor[2],
 896                                 color->ClearColor[3]);
 897                _mesa_IndexMask(color->IndexMask);
 898                if (!ctx->Extensions.EXT_draw_buffers2) {
 899                   _mesa_ColorMask((GLboolean) (color->ColorMask[0][0] != 0),
 900                                   (GLboolean) (color->ColorMask[0][1] != 0),
 901                                   (GLboolean) (color->ColorMask[0][2] != 0),
 902                                   (GLboolean) (color->ColorMask[0][3] != 0));
 903                }
 904                else {
 905                   GLuint i;
 906                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 907                      _mesa_ColorMaskIndexed(i,
 908                                   (GLboolean) (color->ColorMask[i][0] != 0),
 909                                   (GLboolean) (color->ColorMask[i][1] != 0),
 910                                   (GLboolean) (color->ColorMask[i][2] != 0),
 911                                   (GLboolean) (color->ColorMask[i][3] != 0));
 912                   }
 913                }
 914                {
 915                   /* Need to determine if more than one color output is
 916                    * specified.  If so, call glDrawBuffersARB, else call
 917                    * glDrawBuffer().  This is a subtle, but essential point
 918                    * since GL_FRONT (for example) is illegal for the former
 919                    * function, but legal for the later.
 920                    */
 921                   GLboolean multipleBuffers = GL_FALSE;
 922                   GLuint i;
 923
 924                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 925                      if (color->DrawBuffer[i] != GL_NONE) {
 926                         multipleBuffers = GL_TRUE;
 927                         break;
 928                      }
 929                   }
 930                   /* Call the API_level functions, not _mesa_drawbuffers()
 931                    * since we need to do error checking on the pop'd
 932                    * GL_DRAW_BUFFER.
 933                    * Ex: if GL_FRONT were pushed, but we're popping with a
 934                    * user FBO bound, GL_FRONT will be illegal and we'll need
 935                    * to record that error.  Per OpenGL ARB decision.
 936                    */
 937                   if (multipleBuffers)
 938                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 939                                           color->DrawBuffer);
 940                   else
 941                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 942                }
 943                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 944                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 945                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 946                   if (ctx->Extensions.EXT_draw_buffers2) {
 947                      GLuint i;
 948                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 949                         _mesa_set_enablei(ctx, GL_BLEND, i,
 950                                           (color->BlendEnabled >> i) & 1);
 951                      }
 952                   }
 953                   else {
 954                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 955                   }
 956                }
 957                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 958                                           color->BlendDstRGB,
 959                                           color->BlendSrcA,
 960                                           color->BlendDstA);
 961                /* This special case is because glBlendEquationSeparateEXT
 962                 * cannot take GL_LOGIC_OP as a parameter.
 963                 */
 964                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 965                   _mesa_BlendEquation(color->BlendEquationRGB);
 966                }
 967                else {
 968                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 969                                                  color->BlendEquationA);
 970                }
 971                _mesa_BlendColor(color->BlendColor[0],
 972                                 color->BlendColor[1],
 973                                 color->BlendColor[2],
 974                                 color->BlendColor[3]);
 975                _mesa_LogicOp(color->LogicOp);
 976                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 977                                 color->ColorLogicOpEnabled);
 978                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 979                                 color->IndexLogicOpEnabled);
 980                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 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             }
1104             break;
1105          case GL_LINE_BIT:
1106             {
1107                const struct gl_line_attrib *line;
1108                line = (const struct gl_line_attrib *) attr->data;
1109                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1110                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1111                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1112                _mesa_LineWidth(line->Width);
1113             }
1114             break;
1115          case GL_LIST_BIT:
1116             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1117             break;
1118          case GL_PIXEL_MODE_BIT:
1119             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1120             /* XXX what other pixel state needs to be set by function calls? */
1121             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1122             ctx->NewState |= _NEW_PIXEL;
1123             break;
1124          case GL_POINT_BIT:
1125             {
1126                const struct gl_point_attrib *point;
1127                point = (const struct gl_point_attrib *) attr->data;
1128                _mesa_PointSize(point->Size);
1129                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1130                if (ctx->Extensions.EXT_point_parameters) {
1131                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1132                                          point->Params);
1133                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1134                                         point->MinSize);
1135                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1136                                         point->MaxSize);
1137                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1138                                         point->Threshold);
1139                }
1140                if (ctx->Extensions.NV_point_sprite
1141                    || ctx->Extensions.ARB_point_sprite) {
1142                   GLuint u;
1143                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1144                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1145                                    (GLint) point->CoordReplace[u]);
1146                   }
1147                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1148                   if (ctx->Extensions.NV_point_sprite)
1149                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1150                                            ctx->Point.SpriteRMode);
1151                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1152                                         (GLfloat)ctx->Point.SpriteOrigin);
1153                }
1154             }
1155             break;
1156          case GL_POLYGON_BIT:
1157             {
1158                const struct gl_polygon_attrib *polygon;
1159                polygon = (const struct gl_polygon_attrib *) attr->data;
1160                _mesa_CullFace(polygon->CullFaceMode);
1161                _mesa_FrontFace(polygon->FrontFace);
1162                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1163                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1164                _mesa_PolygonOffset(polygon->OffsetFactor,
1165                                    polygon->OffsetUnits);
1166                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1167                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1168                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1169                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1170                                 polygon->OffsetPoint);
1171                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1172                                 polygon->OffsetLine);
1173                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1174                                 polygon->OffsetFill);
1175             }
1176             break;
1177          case GL_POLYGON_STIPPLE_BIT:
1178             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1179             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1180             if (ctx->Driver.PolygonStipple)
1181                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1182             break;
1183          case GL_SCISSOR_BIT:
1184             {
1185                const struct gl_scissor_attrib *scissor;
1186                scissor = (const struct gl_scissor_attrib *) attr->data;
1187                _mesa_Scissor(scissor->X, scissor->Y,
1188                              scissor->Width, scissor->Height);
1189                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1190             }
1191             break;
1192          case GL_STENCIL_BUFFER_BIT:
1193             {
1194                const struct gl_stencil_attrib *stencil;
1195                stencil = (const struct gl_stencil_attrib *) attr->data;
1196                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1197                _mesa_ClearStencil(stencil->Clear);
1198                if (ctx->Extensions.EXT_stencil_two_side) {
1199                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1200                                    stencil->TestTwoSide);
1201                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1202                                              ? GL_BACK : GL_FRONT);
1203                }
1204                /* front state */
1205                _mesa_StencilFuncSeparate(GL_FRONT,
1206                                          stencil->Function[0],
1207                                          stencil->Ref[0],
1208                                          stencil->ValueMask[0]);
1209                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1210                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1211                                        stencil->ZFailFunc[0],
1212                                        stencil->ZPassFunc[0]);
1213                /* back state */
1214                _mesa_StencilFuncSeparate(GL_BACK,
1215                                          stencil->Function[1],
1216                                          stencil->Ref[1],
1217                                          stencil->ValueMask[1]);
1218                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1219                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1220                                        stencil->ZFailFunc[1],
1221                                        stencil->ZPassFunc[1]);
1222             }
1223             break;
1224          case GL_TRANSFORM_BIT:
1225             {
1226                GLuint i;
1227                const struct gl_transform_attrib *xform;
1228                xform = (const struct gl_transform_attrib *) attr->data;
1229                _mesa_MatrixMode(xform->MatrixMode);
1230                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1231                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1232
1233                /* restore clip planes */
1234                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1235                   const GLuint mask = 1 << i;
1236                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1237                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1238                   if (xform->ClipPlanesEnabled & mask) {
1239                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1240                   }
1241                   else {
1242                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1243                   }
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             /* Take care of texture object reference counters */
1261             {
1262                struct texture_state *texstate
1263                   = (struct texture_state *) attr->data;
1264                pop_texture_group(ctx, texstate);
1265                ctx->NewState |= _NEW_TEXTURE;
1266             }
1267             break;
1268          case GL_VIEWPORT_BIT:
1269             {
1270                const struct gl_viewport_attrib *vp;
1271                vp = (const struct gl_viewport_attrib *) attr->data;
1272                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1273                _mesa_DepthRange(vp->Near, vp->Far);
1274             }
1275             break;
1276          case GL_MULTISAMPLE_BIT_ARB:
1277             {
1278                const struct gl_multisample_attrib *ms;
1279                ms = (const struct gl_multisample_attrib *) attr->data;
1280                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1281                                        ms->SampleCoverageInvert);
1282             }
1283             break;
1284
1285          default:
1286             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1287             break;
1288       }
1289
1290       next = attr->next;
1291       FREE( attr->data );
1292       FREE( attr );
1293       attr = next;
1294    }
1295 }
1296
1297
1298 /**
1299  * Helper for incrementing/decrementing vertex buffer object reference
1300  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1301  */
1302 static void
1303 adjust_buffer_object_ref_counts(struct gl_array_object *arrayObj, GLint step)
1304 {
1305    GLuint i;
1306
1307    arrayObj->Vertex.BufferObj->RefCount += step;
1308    arrayObj->Weight.BufferObj->RefCount += step;
1309    arrayObj->Normal.BufferObj->RefCount += step;
1310    arrayObj->Color.BufferObj->RefCount += step;
1311    arrayObj->SecondaryColor.BufferObj->RefCount += step;
1312    arrayObj->FogCoord.BufferObj->RefCount += step;
1313    arrayObj->Index.BufferObj->RefCount += step;
1314    arrayObj->EdgeFlag.BufferObj->RefCount += step;
1315    for (i = 0; i < Elements(arrayObj->TexCoord); i++)
1316       arrayObj->TexCoord[i].BufferObj->RefCount += step;
1317    for (i = 0; i < Elements(arrayObj->VertexAttrib); i++)
1318       arrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1319 }
1320
1321
1322 /**
1323  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1324  * object refcounts.
1325  */
1326 static void
1327 copy_pixelstore(struct gl_context *ctx,
1328                 struct gl_pixelstore_attrib *dst,
1329                 const struct gl_pixelstore_attrib *src)
1330 {
1331    dst->Alignment = src->Alignment;
1332    dst->RowLength = src->RowLength;
1333    dst->SkipPixels = src->SkipPixels;
1334    dst->SkipRows = src->SkipRows;
1335    dst->ImageHeight = src->ImageHeight;
1336    dst->SkipImages = src->SkipImages;
1337    dst->SwapBytes = src->SwapBytes;
1338    dst->LsbFirst = src->LsbFirst;
1339    dst->ClientStorage = src->ClientStorage;
1340    dst->Invert = src->Invert;
1341    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1342 }
1343
1344
1345 #define GL_CLIENT_PACK_BIT (1<<20)
1346 #define GL_CLIENT_UNPACK_BIT (1<<21)
1347
1348
1349 void GLAPIENTRY
1350 _mesa_PushClientAttrib(GLbitfield mask)
1351 {
1352    struct gl_attrib_node *head;
1353
1354    GET_CURRENT_CONTEXT(ctx);
1355    ASSERT_OUTSIDE_BEGIN_END(ctx);
1356
1357    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1358       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1359       return;
1360    }
1361
1362    /* Build linked list of attribute nodes which save all attribute
1363     * groups specified by the mask.
1364     */
1365    head = NULL;
1366
1367    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1368       struct gl_pixelstore_attrib *attr;
1369       /* packing attribs */
1370       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1371       copy_pixelstore(ctx, attr, &ctx->Pack);
1372       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1373       /* unpacking attribs */
1374       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1375       copy_pixelstore(ctx, attr, &ctx->Unpack);
1376       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1377    }
1378
1379    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1380       struct gl_array_attrib *attr;
1381       struct gl_array_object *obj;
1382
1383       attr = MALLOC_STRUCT( gl_array_attrib );
1384       obj = MALLOC_STRUCT( gl_array_object );
1385
1386 #if FEATURE_ARB_vertex_buffer_object
1387       /* increment ref counts since we're copying pointers to these objects */
1388       ctx->Array.ArrayBufferObj->RefCount++;
1389       ctx->Array.ElementArrayBufferObj->RefCount++;
1390 #endif
1391
1392       memcpy( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1393       memcpy( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1394
1395       attr->ArrayObj = obj;
1396
1397       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1398
1399       /* bump reference counts on buffer objects */
1400       adjust_buffer_object_ref_counts(ctx->Array.ArrayObj, 1);
1401    }
1402
1403    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1404    ctx->ClientAttribStackDepth++;
1405 }
1406
1407
1408
1409
1410 void GLAPIENTRY
1411 _mesa_PopClientAttrib(void)
1412 {
1413    struct gl_attrib_node *node, *next;
1414
1415    GET_CURRENT_CONTEXT(ctx);
1416    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1417
1418    if (ctx->ClientAttribStackDepth == 0) {
1419       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1420       return;
1421    }
1422
1423    ctx->ClientAttribStackDepth--;
1424    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1425
1426    while (node) {
1427       switch (node->kind) {
1428          case GL_CLIENT_PACK_BIT:
1429             {
1430                struct gl_pixelstore_attrib *store =
1431                   (struct gl_pixelstore_attrib *) node->data;
1432                copy_pixelstore(ctx, &ctx->Pack, store);
1433                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1434             }
1435             ctx->NewState |= _NEW_PACKUNPACK;
1436             break;
1437          case GL_CLIENT_UNPACK_BIT:
1438             {
1439                struct gl_pixelstore_attrib *store =
1440                   (struct gl_pixelstore_attrib *) node->data;
1441                copy_pixelstore(ctx, &ctx->Unpack, store);
1442                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1443             }
1444             ctx->NewState |= _NEW_PACKUNPACK;
1445             break;
1446          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1447             struct gl_array_attrib * data =
1448               (struct gl_array_attrib *) node->data;
1449
1450             adjust_buffer_object_ref_counts(ctx->Array.ArrayObj, -1);
1451
1452             ctx->Array.ActiveTexture = data->ActiveTexture;
1453             if (data->LockCount != 0)
1454                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1455             else if (ctx->Array.LockCount)
1456                _mesa_UnlockArraysEXT();
1457
1458             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1459
1460 #if FEATURE_ARB_vertex_buffer_object
1461             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1462                                 data->ArrayBufferObj->Name);
1463             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1464                                 data->ElementArrayBufferObj->Name);
1465 #endif
1466
1467             memcpy( ctx->Array.ArrayObj, data->ArrayObj,
1468                     sizeof( struct gl_array_object ) );
1469
1470             FREE( data->ArrayObj );
1471
1472             /* FIXME: Should some bits in ctx->Array->NewState also be set
1473              * FIXME: here?  It seems like it should be set to inclusive-or
1474              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1475              */
1476
1477             ctx->NewState |= _NEW_ARRAY;
1478             break;
1479          }
1480          default:
1481             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1482             break;
1483       }
1484
1485       next = node->next;
1486       FREE( node->data );
1487       FREE( node );
1488       node = next;
1489    }
1490 }
1491
1492
1493 void
1494 _mesa_init_attrib_dispatch(struct _glapi_table *disp)
1495 {
1496    SET_PopAttrib(disp, _mesa_PopAttrib);
1497    SET_PushAttrib(disp, _mesa_PushAttrib);
1498    SET_PopClientAttrib(disp, _mesa_PopClientAttrib);
1499    SET_PushClientAttrib(disp, _mesa_PushClientAttrib);
1500 }
1501
1502
1503 #endif /* FEATURE_attrib_stack */
1504
1505
1506 /**
1507  * Free any attribute state data that might be attached to the context.
1508  */
1509 void
1510 _mesa_free_attrib_data(struct gl_context *ctx)
1511 {
1512    while (ctx->AttribStackDepth > 0) {
1513       struct gl_attrib_node *attr, *next;
1514
1515       ctx->AttribStackDepth--;
1516       attr = ctx->AttribStack[ctx->AttribStackDepth];
1517
1518       while (attr) {
1519          if (attr->kind == GL_TEXTURE_BIT) {
1520             struct texture_state *texstate = (struct texture_state*)attr->data;
1521             GLuint u, tgt;
1522             /* clear references to the saved texture objects */
1523             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1524                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1525                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1526                }
1527             }
1528          }
1529          else {
1530             /* any other chunks of state that requires special handling? */
1531          }
1532
1533          next = attr->next;
1534          free(attr->data);
1535          free(attr);
1536          attr = next;
1537       }
1538    }
1539 }
1540
1541
1542 void _mesa_init_attrib( struct gl_context *ctx )
1543 {
1544    /* Renderer and client attribute stacks */
1545    ctx->AttribStackDepth = 0;
1546    ctx->ClientAttribStackDepth = 0;
1547 }