src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.3
   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 "colortab.h"
  37 #include "context.h"
  38 #include "depth.h"
  39 #include "enable.h"
  40 #include "enums.h"
  41 #include "fog.h"
  42 #include "hint.h"
  43 #include "light.h"
  44 #include "lines.h"
  45 #include "matrix.h"
  46 #include "multisample.h"
  47 #include "points.h"
  48 #include "polygon.h"
  49 #include "scissor.h"
  50 #include "simple_list.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 "mtypes.h"
  59 #include "math/m_xform.h"
  60
  61 /**
  62  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
  63  */
  64 struct texture_state
  65 {
  66    struct gl_texture_attrib Texture;  /**< The usual context state */
  67
  68    /** to save per texture object state (wrap modes, filters, etc): */
  69    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  70
  71    /**
  72     * To save references to texture objects (so they don't get accidentally
  73     * deleted while saved in the attribute stack).
  74     */
  75    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  76 };
  77
  78
  79 /**
  80  * Allocate a new attribute state node.  These nodes have a
  81  * "kind" value and a pointer to a struct of state data.
  82  */
  83 static struct gl_attrib_node *
  84 new_attrib_node( GLbitfield kind )
  85 {
  86    struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
  87    if (an) {
  88       an->kind = kind;
  89    }
  90    return an;
  91 }
  92
  93
  94 void GLAPIENTRY
  95 _mesa_PushAttrib(GLbitfield mask)
  96 {
  97    struct gl_attrib_node *newnode;
  98    struct gl_attrib_node *head;
  99
 100    GET_CURRENT_CONTEXT(ctx);
 101    ASSERT_OUTSIDE_BEGIN_END(ctx);
 102
 103    if (MESA_VERBOSE & VERBOSE_API)
 104       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 105
 106    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 107       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 108       return;
 109    }
 110
 111    /* Build linked list of attribute nodes which save all attribute */
 112    /* groups specified by the mask. */
 113    head = NULL;
 114
 115    if (mask & GL_ACCUM_BUFFER_BIT) {
 116       struct gl_accum_attrib *attr;
 117       attr = MALLOC_STRUCT( gl_accum_attrib );
 118       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 119       newnode = new_attrib_node( GL_ACCUM_BUFFER_BIT );
 120       newnode->data = attr;
 121       newnode->next = head;
 122       head = newnode;
 123    }
 124
 125    if (mask & GL_COLOR_BUFFER_BIT) {
 126       GLuint i;
 127       struct gl_colorbuffer_attrib *attr;
 128       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 129       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 130       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 131       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 132          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 133       newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
 134       newnode->data = attr;
 135       newnode->next = head;
 136       head = newnode;
 137    }
 138
 139    if (mask & GL_CURRENT_BIT) {
 140       struct gl_current_attrib *attr;
 141       FLUSH_CURRENT( ctx, 0 );
 142       attr = MALLOC_STRUCT( gl_current_attrib );
 143       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 144       newnode = new_attrib_node( GL_CURRENT_BIT );
 145       newnode->data = attr;
 146       newnode->next = head;
 147       head = newnode;
 148    }
 149
 150    if (mask & GL_DEPTH_BUFFER_BIT) {
 151       struct gl_depthbuffer_attrib *attr;
 152       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 153       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 154       newnode = new_attrib_node( GL_DEPTH_BUFFER_BIT );
 155       newnode->data = attr;
 156       newnode->next = head;
 157       head = newnode;
 158    }
 159
 160    if (mask & GL_ENABLE_BIT) {
 161       struct gl_enable_attrib *attr;
 162       GLuint i;
 163       attr = MALLOC_STRUCT( gl_enable_attrib );
 164       /* Copy enable flags from all other attributes into the enable struct. */
 165       attr->AlphaTest = ctx->Color.AlphaEnabled;
 166       attr->AutoNormal = ctx->Eval.AutoNormal;
 167       attr->Blend = ctx->Color.BlendEnabled;
 168       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 169       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 170       for (i = 0; i < COLORTABLE_MAX; i++) {
 171          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 172       }
 173       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 174       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 175       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 176       attr->CullFace = ctx->Polygon.CullFlag;
 177       attr->DepthTest = ctx->Depth.Test;
 178       attr->Dither = ctx->Color.DitherFlag;
 179       attr->Fog = ctx->Fog.Enabled;
 180       for (i = 0; i < ctx->Const.MaxLights; i++) {
 181          attr->Light[i] = ctx->Light.Light[i].Enabled;
 182       }
 183       attr->Lighting = ctx->Light.Enabled;
 184       attr->LineSmooth = ctx->Line.SmoothFlag;
 185       attr->LineStipple = ctx->Line.StippleFlag;
 186       attr->Histogram = ctx->Pixel.HistogramEnabled;
 187       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 188       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 189       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 190       attr->Map1Color4 = ctx->Eval.Map1Color4;
 191       attr->Map1Index = ctx->Eval.Map1Index;
 192       attr->Map1Normal = ctx->Eval.Map1Normal;
 193       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 194       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 195       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 196       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 197       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 198       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 199       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 200       attr->Map2Color4 = ctx->Eval.Map2Color4;
 201       attr->Map2Index = ctx->Eval.Map2Index;
 202       attr->Map2Normal = ctx->Eval.Map2Normal;
 203       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 204       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 205       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 206       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 207       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 208       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 209       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 210       attr->Normalize = ctx->Transform.Normalize;
 211       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 212       attr->PointSmooth = ctx->Point.SmoothFlag;
 213       attr->PointSprite = ctx->Point.PointSprite;
 214       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 215       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 216       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 217       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 218       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 219       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 220       attr->Scissor = ctx->Scissor.Enabled;
 221       attr->Stencil = ctx->Stencil.Enabled;
 222       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 223       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 224       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 225       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 226       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 227       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 228       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 229          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 230          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 231          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 232       }
 233       /* GL_NV_vertex_program */
 234       attr->VertexProgram = ctx->VertexProgram.Enabled;
 235       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 236       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 237       newnode = new_attrib_node( GL_ENABLE_BIT );
 238       newnode->data = attr;
 239       newnode->next = head;
 240       head = newnode;
 241    }
 242
 243    if (mask & GL_EVAL_BIT) {
 244       struct gl_eval_attrib *attr;
 245       attr = MALLOC_STRUCT( gl_eval_attrib );
 246       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 247       newnode = new_attrib_node( GL_EVAL_BIT );
 248       newnode->data = attr;
 249       newnode->next = head;
 250       head = newnode;
 251    }
 252
 253    if (mask & GL_FOG_BIT) {
 254       struct gl_fog_attrib *attr;
 255       attr = MALLOC_STRUCT( gl_fog_attrib );
 256       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 257       newnode = new_attrib_node( GL_FOG_BIT );
 258       newnode->data = attr;
 259       newnode->next = head;
 260       head = newnode;
 261    }
 262
 263    if (mask & GL_HINT_BIT) {
 264       struct gl_hint_attrib *attr;
 265       attr = MALLOC_STRUCT( gl_hint_attrib );
 266       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 267       newnode = new_attrib_node( GL_HINT_BIT );
 268       newnode->data = attr;
 269       newnode->next = head;
 270       head = newnode;
 271    }
 272
 273    if (mask & GL_LIGHTING_BIT) {
 274       struct gl_light_attrib *attr;
 275       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 276       attr = MALLOC_STRUCT( gl_light_attrib );
 277       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 278       newnode = new_attrib_node( GL_LIGHTING_BIT );
 279       newnode->data = attr;
 280       newnode->next = head;
 281       head = newnode;
 282    }
 283
 284    if (mask & GL_LINE_BIT) {
 285       struct gl_line_attrib *attr;
 286       attr = MALLOC_STRUCT( gl_line_attrib );
 287       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 288       newnode = new_attrib_node( GL_LINE_BIT );
 289       newnode->data = attr;
 290       newnode->next = head;
 291       head = newnode;
 292    }
 293
 294    if (mask & GL_LIST_BIT) {
 295       struct gl_list_attrib *attr;
 296       attr = MALLOC_STRUCT( gl_list_attrib );
 297       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 298       newnode = new_attrib_node( GL_LIST_BIT );
 299       newnode->data = attr;
 300       newnode->next = head;
 301       head = newnode;
 302    }
 303
 304    if (mask & GL_PIXEL_MODE_BIT) {
 305       struct gl_pixel_attrib *attr;
 306       attr = MALLOC_STRUCT( gl_pixel_attrib );
 307       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 308       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 309       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 310       newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
 311       newnode->data = attr;
 312       newnode->next = head;
 313       head = newnode;
 314    }
 315
 316    if (mask & GL_POINT_BIT) {
 317       struct gl_point_attrib *attr;
 318       attr = MALLOC_STRUCT( gl_point_attrib );
 319       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 320       newnode = new_attrib_node( GL_POINT_BIT );
 321       newnode->data = attr;
 322       newnode->next = head;
 323       head = newnode;
 324    }
 325
 326    if (mask & GL_POLYGON_BIT) {
 327       struct gl_polygon_attrib *attr;
 328       attr = MALLOC_STRUCT( gl_polygon_attrib );
 329       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 330       newnode = new_attrib_node( GL_POLYGON_BIT );
 331       newnode->data = attr;
 332       newnode->next = head;
 333       head = newnode;
 334    }
 335
 336    if (mask & GL_POLYGON_STIPPLE_BIT) {
 337       GLuint *stipple;
 338       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 339       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 340       newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
 341       newnode->data = stipple;
 342       newnode->next = head;
 343       head = newnode;
 344    }
 345
 346    if (mask & GL_SCISSOR_BIT) {
 347       struct gl_scissor_attrib *attr;
 348       attr = MALLOC_STRUCT( gl_scissor_attrib );
 349       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 350       newnode = new_attrib_node( GL_SCISSOR_BIT );
 351       newnode->data = attr;
 352       newnode->next = head;
 353       head = newnode;
 354    }
 355
 356    if (mask & GL_STENCIL_BUFFER_BIT) {
 357       struct gl_stencil_attrib *attr;
 358       attr = MALLOC_STRUCT( gl_stencil_attrib );
 359       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 360       newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
 361       newnode->data = attr;
 362       newnode->next = head;
 363       head = newnode;
 364    }
 365
 366    if (mask & GL_TEXTURE_BIT) {
 367       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 368       GLuint u;
 369
 370       if (!texstate) {
 371          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 372          goto end;
 373       }
 374
 375       _mesa_lock_context_textures(ctx);
 376
 377       /* copy/save the bulk of texture state here */
 378       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 379
 380       /* Save references to the currently bound texture objects so they don't
 381        * accidentally get deleted while referenced in the attribute stack.
 382        */
 383       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 384          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_INDEX],
 385                                 ctx->Texture.Unit[u].Current1D);
 386          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_INDEX],
 387                                 ctx->Texture.Unit[u].Current2D);
 388          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_3D_INDEX],
 389                                 ctx->Texture.Unit[u].Current3D);
 390          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_CUBE_INDEX],
 391                                 ctx->Texture.Unit[u].CurrentCubeMap);
 392          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_RECT_INDEX],
 393                                 ctx->Texture.Unit[u].CurrentRect);
 394          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_ARRAY_INDEX],
 395                                 ctx->Texture.Unit[u].Current1DArray);
 396          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_ARRAY_INDEX],
 397                                 ctx->Texture.Unit[u].Current2DArray);
 398       }
 399
 400       /* copy state/contents of the currently bound texture objects */
 401       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 402          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_INDEX],
 403                                    ctx->Texture.Unit[u].Current1D);
 404          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_INDEX],
 405                                    ctx->Texture.Unit[u].Current2D);
 406          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_3D_INDEX],
 407                                    ctx->Texture.Unit[u].Current3D);
 408          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_CUBE_INDEX],
 409                                    ctx->Texture.Unit[u].CurrentCubeMap);
 410          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_RECT_INDEX],
 411                                    ctx->Texture.Unit[u].CurrentRect);
 412          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_ARRAY_INDEX],
 413                                    ctx->Texture.Unit[u].Current1DArray);
 414          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_ARRAY_INDEX],
 415                                    ctx->Texture.Unit[u].Current2DArray);
 416       }
 417
 418       _mesa_unlock_context_textures(ctx);
 419
 420       newnode = new_attrib_node( GL_TEXTURE_BIT );
 421       newnode->data = texstate;
 422       newnode->next = head;
 423       head = newnode;
 424    }
 425
 426    if (mask & GL_TRANSFORM_BIT) {
 427       struct gl_transform_attrib *attr;
 428       attr = MALLOC_STRUCT( gl_transform_attrib );
 429       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 430       newnode = new_attrib_node( GL_TRANSFORM_BIT );
 431       newnode->data = attr;
 432       newnode->next = head;
 433       head = newnode;
 434    }
 435
 436    if (mask & GL_VIEWPORT_BIT) {
 437       struct gl_viewport_attrib *attr;
 438       attr = MALLOC_STRUCT( gl_viewport_attrib );
 439       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 440       newnode = new_attrib_node( GL_VIEWPORT_BIT );
 441       newnode->data = attr;
 442       newnode->next = head;
 443       head = newnode;
 444    }
 445
 446    /* GL_ARB_multisample */
 447    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 448       struct gl_multisample_attrib *attr;
 449       attr = MALLOC_STRUCT( gl_multisample_attrib );
 450       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 451       newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
 452       newnode->data = attr;
 453       newnode->next = head;
 454       head = newnode;
 455    }
 456
 457 end:
 458    ctx->AttribStack[ctx->AttribStackDepth] = head;
 459    ctx->AttribStackDepth++;
 460 }
 461
 462
 463
 464 static void
 465 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 466 {
 467    GLuint i;
 468
 469 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 470         if ((VALUE) != (NEWVALUE)) {                    \
 471            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 472         }
 473
 474    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 475    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 476
 477    for (i=0;i<MAX_CLIP_PLANES;i++) {
 478       const GLuint mask = 1 << i;
 479       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 480           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 481                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 482    }
 483
 484    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 485                    GL_COLOR_MATERIAL);
 486    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 487                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 488                    GL_COLOR_TABLE);
 489    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 490                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 491                    GL_POST_CONVOLUTION_COLOR_TABLE);
 492    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 493                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 494                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 495    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 496    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 497    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 498    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 499                    GL_CONVOLUTION_1D);
 500    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 501                    GL_CONVOLUTION_2D);
 502    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 503                    GL_SEPARABLE_2D);
 504    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 505    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 506    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 507    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 508                    GL_LINE_STIPPLE);
 509    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 510                    GL_INDEX_LOGIC_OP);
 511    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 512                    GL_COLOR_LOGIC_OP);
 513
 514    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 515    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 516    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 517    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 518                    GL_MAP1_TEXTURE_COORD_1);
 519    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 520                    GL_MAP1_TEXTURE_COORD_2);
 521    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 522                    GL_MAP1_TEXTURE_COORD_3);
 523    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 524                    GL_MAP1_TEXTURE_COORD_4);
 525    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 526                    GL_MAP1_VERTEX_3);
 527    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 528                    GL_MAP1_VERTEX_4);
 529    for (i = 0; i < 16; i++) {
 530       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 531                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 532    }
 533
 534    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 535    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 536    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 537    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 538                    GL_MAP2_TEXTURE_COORD_1);
 539    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 540                    GL_MAP2_TEXTURE_COORD_2);
 541    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 542                    GL_MAP2_TEXTURE_COORD_3);
 543    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 544                    GL_MAP2_TEXTURE_COORD_4);
 545    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 546                    GL_MAP2_VERTEX_3);
 547    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 548                    GL_MAP2_VERTEX_4);
 549    for (i = 0; i < 16; i++) {
 550       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 551                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 552    }
 553
 554    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 555    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 556    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 557                    GL_RESCALE_NORMAL_EXT);
 558    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 559                    enable->RasterPositionUnclipped,
 560                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 561    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 562                    GL_POINT_SMOOTH);
 563    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 564       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 565                       GL_POINT_SPRITE_NV);
 566    }
 567    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 568                    GL_POLYGON_OFFSET_POINT);
 569    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 570                    GL_POLYGON_OFFSET_LINE);
 571    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 572                    GL_POLYGON_OFFSET_FILL);
 573    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 574                    GL_POLYGON_SMOOTH);
 575    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 576                    GL_POLYGON_STIPPLE);
 577    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 578    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 579    if (ctx->Extensions.EXT_stencil_two_side) {
 580       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 581    }
 582    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 583                    GL_MULTISAMPLE_ARB);
 584    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 585                    enable->SampleAlphaToCoverage,
 586                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 587    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 588                    enable->SampleAlphaToOne,
 589                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 590    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 591                    enable->SampleCoverage,
 592                    GL_SAMPLE_COVERAGE_ARB);
 593    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 594                    enable->SampleCoverageInvert,
 595                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 596    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 597    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 598                    enable->VertexProgram,
 599                    GL_VERTEX_PROGRAM_ARB);
 600    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 601                    enable->VertexProgramPointSize,
 602                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 603    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 604                    enable->VertexProgramTwoSide,
 605                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 606
 607 #undef TEST_AND_UPDATE
 608
 609    /* texture unit enables */
 610    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 611       if (ctx->Texture.Unit[i].Enabled != enable->Texture[i]) {
 612          ctx->Texture.Unit[i].Enabled = enable->Texture[i];
 613          if (ctx->Driver.Enable) {
 614             if (ctx->Driver.ActiveTexture) {
 615                (*ctx->Driver.ActiveTexture)(ctx, i);
 616             }
 617             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_1D,
 618                              (GLboolean) (enable->Texture[i] & TEXTURE_1D_BIT) );
 619             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_2D,
 620                              (GLboolean) (enable->Texture[i] & TEXTURE_2D_BIT) );
 621             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_3D,
 622                              (GLboolean) (enable->Texture[i] & TEXTURE_3D_BIT) );
 623             if (ctx->Extensions.ARB_texture_cube_map)
 624                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_CUBE_MAP_ARB,
 625                           (GLboolean) (enable->Texture[i] & TEXTURE_CUBE_BIT) );
 626             if (ctx->Extensions.NV_texture_rectangle)
 627                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_RECTANGLE_NV,
 628                           (GLboolean) (enable->Texture[i] & TEXTURE_RECT_BIT) );
 629          }
 630       }
 631
 632       if (ctx->Texture.Unit[i].TexGenEnabled != enable->TexGen[i]) {
 633          ctx->Texture.Unit[i].TexGenEnabled = enable->TexGen[i];
 634          if (ctx->Driver.Enable) {
 635             if (ctx->Driver.ActiveTexture) {
 636                (*ctx->Driver.ActiveTexture)(ctx, i);
 637             }
 638             if (enable->TexGen[i] & S_BIT)
 639                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_TRUE);
 640             else
 641                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_FALSE);
 642             if (enable->TexGen[i] & T_BIT)
 643                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_TRUE);
 644             else
 645                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_FALSE);
 646             if (enable->TexGen[i] & R_BIT)
 647                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_TRUE);
 648             else
 649                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_FALSE);
 650             if (enable->TexGen[i] & Q_BIT)
 651                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
 652             else
 653                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
 654          }
 655       }
 656
 657       /* GL_SGI_texture_color_table */
 658       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 659    }
 660
 661    if (ctx->Driver.ActiveTexture) {
 662       (*ctx->Driver.ActiveTexture)(ctx, ctx->Texture.CurrentUnit);
 663    }
 664 }
 665
 666
 667 /**
 668  * Pop/restore texture attribute/group state.
 669  */
 670 static void
 671 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 672 {
 673    GLuint u;
 674
 675    _mesa_lock_context_textures(ctx);
 676
 677    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 678       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 679       GLuint tgt;
 680
 681       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 682       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 683                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 684       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 685                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 686       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 687                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 688       if (ctx->Extensions.ARB_texture_cube_map) {
 689          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 690                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 691       }
 692       if (ctx->Extensions.NV_texture_rectangle) {
 693          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 694                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 695       }
 696       if (ctx->Extensions.SGI_texture_color_table) {
 697          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 698                           unit->ColorTableEnabled);
 699       }
 700       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 701       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 702       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenModeS);
 703       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenModeT);
 704       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenModeR);
 705       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenModeQ);
 706       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->ObjectPlaneS);
 707       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->ObjectPlaneT);
 708       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->ObjectPlaneR);
 709       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->ObjectPlaneQ);
 710       /* Eye plane done differently to avoid re-transformation */
 711       {
 712          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 713          COPY_4FV(destUnit->EyePlaneS, unit->EyePlaneS);
 714          COPY_4FV(destUnit->EyePlaneT, unit->EyePlaneT);
 715          COPY_4FV(destUnit->EyePlaneR, unit->EyePlaneR);
 716          COPY_4FV(destUnit->EyePlaneQ, unit->EyePlaneQ);
 717          if (ctx->Driver.TexGen) {
 718             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->EyePlaneS);
 719             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->EyePlaneT);
 720             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->EyePlaneR);
 721             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->EyePlaneQ);
 722          }
 723       }
 724       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 725                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 726       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 727                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 728       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 729                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 730       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 731                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 732       if (ctx->Extensions.EXT_texture_lod_bias) {
 733          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 734                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 735       }
 736       if (ctx->Extensions.EXT_texture_env_combine ||
 737           ctx->Extensions.ARB_texture_env_combine) {
 738          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 739                        unit->Combine.ModeRGB);
 740          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 741                        unit->Combine.ModeA);
 742          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 743                        unit->Combine.SourceRGB[0]);
 744          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 745                        unit->Combine.SourceRGB[1]);
 746          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 747                        unit->Combine.SourceRGB[2]);
 748          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 749                        unit->Combine.SourceA[0]);
 750          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 751                        unit->Combine.SourceA[1]);
 752          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 753                        unit->Combine.SourceA[2]);
 754          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 755                        unit->Combine.OperandRGB[0]);
 756          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 757                        unit->Combine.OperandRGB[1]);
 758          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 759                        unit->Combine.OperandRGB[2]);
 760          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 761                        unit->Combine.OperandA[0]);
 762          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 763                        unit->Combine.OperandA[1]);
 764          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 765                        unit->Combine.OperandA[2]);
 766          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 767                        1 << unit->Combine.ScaleShiftRGB);
 768          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 769                        1 << unit->Combine.ScaleShiftA);
 770       }
 771
 772       /* Restore texture object state for each target */
 773       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 774          const struct gl_texture_object *obj = NULL;
 775          GLfloat bordColor[4];
 776          GLenum target;
 777
 778          obj = &texstate->SavedObj[u][tgt];
 779
 780          /* don't restore state for unsupported targets to prevent
 781           * raising GL errors.
 782           */
 783          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 784              !ctx->Extensions.ARB_texture_cube_map) {
 785             continue;
 786          }
 787          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 788                   !ctx->Extensions.NV_texture_rectangle) {
 789             continue;
 790          }
 791          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 792                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 793                   !ctx->Extensions.MESA_texture_array) {
 794             continue;
 795          }
 796
 797          target = obj->Target;
 798
 799          _mesa_BindTexture(target, obj->Name);
 800
 801          bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
 802          bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
 803          bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
 804          bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
 805
 806          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
 807          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 808          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 809          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 810          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 811          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 812          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 813          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 814          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 815          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 816          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 817          if (target != GL_TEXTURE_RECTANGLE_ARB)
 818             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 819          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 820             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 821                                 obj->MaxAnisotropy);
 822          }
 823          if (ctx->Extensions.SGIX_shadow) {
 824             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
 825                                 obj->CompareFlag);
 826             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
 827                                 obj->CompareOperator);
 828          }
 829          if (ctx->Extensions.SGIX_shadow_ambient) {
 830             _mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
 831                                 obj->ShadowAmbient);
 832          }
 833       }
 834
 835       /* remove saved references to the texture objects */
 836       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 837          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 838       }
 839    }
 840
 841    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 842
 843    _mesa_unlock_context_textures(ctx);
 844 }
 845
 846
 847 /*
 848  * This function is kind of long just because we have to call a lot
 849  * of device driver functions to update device driver state.
 850  *
 851  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 852  * in order to restore GL state.  This isn't terribly efficient but it
 853  * ensures that dirty flags and any derived state gets updated correctly.
 854  * We could at least check if the value to restore equals the current value
 855  * and then skip the Mesa call.
 856  */
 857 void GLAPIENTRY
 858 _mesa_PopAttrib(void)
 859 {
 860    struct gl_attrib_node *attr, *next;
 861    GET_CURRENT_CONTEXT(ctx);
 862    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 863
 864    if (ctx->AttribStackDepth == 0) {
 865       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 866       return;
 867    }
 868
 869    ctx->AttribStackDepth--;
 870    attr = ctx->AttribStack[ctx->AttribStackDepth];
 871
 872    while (attr) {
 873
 874       if (MESA_VERBOSE & VERBOSE_API) {
 875          _mesa_debug(ctx, "glPopAttrib %s\n",
 876                      _mesa_lookup_enum_by_nr(attr->kind));
 877       }
 878
 879       switch (attr->kind) {
 880          case GL_ACCUM_BUFFER_BIT:
 881             {
 882                const struct gl_accum_attrib *accum;
 883                accum = (const struct gl_accum_attrib *) attr->data;
 884                _mesa_ClearAccum(accum->ClearColor[0],
 885                                 accum->ClearColor[1],
 886                                 accum->ClearColor[2],
 887                                 accum->ClearColor[3]);
 888             }
 889             break;
 890          case GL_COLOR_BUFFER_BIT:
 891             {
 892                const struct gl_colorbuffer_attrib *color;
 893                color = (const struct gl_colorbuffer_attrib *) attr->data;
 894                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 895                _mesa_ClearColor(color->ClearColor[0],
 896                                 color->ClearColor[1],
 897                                 color->ClearColor[2],
 898                                 color->ClearColor[3]);
 899                _mesa_IndexMask(color->IndexMask);
 900                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 901                                (GLboolean) (color->ColorMask[1] != 0),
 902                                (GLboolean) (color->ColorMask[2] != 0),
 903                                (GLboolean) (color->ColorMask[3] != 0));
 904                {
 905                   /* Need to determine if more than one color output is
 906                    * specified.  If so, call glDrawBuffersARB, else call
 907                    * glDrawBuffer().  This is a subtle, but essential point
 908                    * since GL_FRONT (for example) is illegal for the former
 909                    * function, but legal for the later.
 910                    */
 911                   GLboolean multipleBuffers = GL_FALSE;
 912                   if (ctx->Extensions.ARB_draw_buffers) {
 913                      GLuint i;
 914                      for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 915                         if (color->DrawBuffer[i] != GL_NONE) {
 916                            multipleBuffers = GL_TRUE;
 917                            break;
 918                         }
 919                      }
 920                   }
 921                   /* Call the API_level functions, not _mesa_drawbuffers()
 922                    * since we need to do error checking on the pop'd
 923                    * GL_DRAW_BUFFER.
 924                    * Ex: if GL_FRONT were pushed, but we're popping with a
 925                    * user FBO bound, GL_FRONT will be illegal and we'll need
 926                    * to record that error.  Per OpenGL ARB decision.
 927                    */
 928                   if (multipleBuffers)
 929                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 930                                           color->DrawBuffer);
 931                   else
 932                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 933                }
 934                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 935                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 936                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
 937                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 938                                           color->BlendDstRGB,
 939                                           color->BlendSrcA,
 940                                           color->BlendDstA);
 941                /* This special case is because glBlendEquationSeparateEXT
 942                 * cannot take GL_LOGIC_OP as a parameter.
 943                 */
 944                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 945                   _mesa_BlendEquation(color->BlendEquationRGB);
 946                }
 947                else {
 948                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 949                                                  color->BlendEquationA);
 950                }
 951                _mesa_BlendColor(color->BlendColor[0],
 952                                 color->BlendColor[1],
 953                                 color->BlendColor[2],
 954                                 color->BlendColor[3]);
 955                _mesa_LogicOp(color->LogicOp);
 956                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 957                                 color->ColorLogicOpEnabled);
 958                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 959                                 color->IndexLogicOpEnabled);
 960                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 961             }
 962             break;
 963          case GL_CURRENT_BIT:
 964             FLUSH_CURRENT( ctx, 0 );
 965             MEMCPY( &ctx->Current, attr->data,
 966                     sizeof(struct gl_current_attrib) );
 967             break;
 968          case GL_DEPTH_BUFFER_BIT:
 969             {
 970                const struct gl_depthbuffer_attrib *depth;
 971                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 972                _mesa_DepthFunc(depth->Func);
 973                _mesa_ClearDepth(depth->Clear);
 974                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 975                _mesa_DepthMask(depth->Mask);
 976             }
 977             break;
 978          case GL_ENABLE_BIT:
 979             {
 980                const struct gl_enable_attrib *enable;
 981                enable = (const struct gl_enable_attrib *) attr->data;
 982                pop_enable_group(ctx, enable);
 983                ctx->NewState |= _NEW_ALL;
 984             }
 985             break;
 986          case GL_EVAL_BIT:
 987             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 988             ctx->NewState |= _NEW_EVAL;
 989             break;
 990          case GL_FOG_BIT:
 991             {
 992                const struct gl_fog_attrib *fog;
 993                fog = (const struct gl_fog_attrib *) attr->data;
 994                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 995                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 996                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 997                _mesa_Fogf(GL_FOG_START, fog->Start);
 998                _mesa_Fogf(GL_FOG_END, fog->End);
 999                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1000                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1001             }
1002             break;
1003          case GL_HINT_BIT:
1004             {
1005                const struct gl_hint_attrib *hint;
1006                hint = (const struct gl_hint_attrib *) attr->data;
1007                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1008                           hint->PerspectiveCorrection );
1009                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1010                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1011                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1012                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1013                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1014                           hint->ClipVolumeClipping);
1015                if (ctx->Extensions.ARB_texture_compression)
1016                   _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1017                              hint->TextureCompression);
1018             }
1019             break;
1020          case GL_LIGHTING_BIT:
1021             {
1022                GLuint i;
1023                const struct gl_light_attrib *light;
1024                light = (const struct gl_light_attrib *) attr->data;
1025                /* lighting enable */
1026                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1027                /* per-light state */
1028                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1029                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1030
1031                for (i = 0; i < ctx->Const.MaxLights; i++) {
1032                   const struct gl_light *l = &light->Light[i];
1033                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1034                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1035                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1036                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1037                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1038                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->EyeDirection);
1039                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1040                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1041                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1042                               &l->ConstantAttenuation);
1043                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1044                               &l->LinearAttenuation);
1045                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1046                               &l->QuadraticAttenuation);
1047                }
1048                /* light model */
1049                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1050                                   light->Model.Ambient);
1051                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1052                                  (GLfloat) light->Model.LocalViewer);
1053                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1054                                  (GLfloat) light->Model.TwoSide);
1055                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1056                                  (GLfloat) light->Model.ColorControl);
1057                /* shade model */
1058                _mesa_ShadeModel(light->ShadeModel);
1059                /* color material */
1060                _mesa_ColorMaterial(light->ColorMaterialFace,
1061                                    light->ColorMaterialMode);
1062                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1063                                 light->ColorMaterialEnabled);
1064                /* materials */
1065                MEMCPY(&ctx->Light.Material, &light->Material,
1066                       sizeof(struct gl_material));
1067             }
1068             break;
1069          case GL_LINE_BIT:
1070             {
1071                const struct gl_line_attrib *line;
1072                line = (const struct gl_line_attrib *) attr->data;
1073                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1074                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1075                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1076                _mesa_LineWidth(line->Width);
1077             }
1078             break;
1079          case GL_LIST_BIT:
1080             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1081             break;
1082          case GL_PIXEL_MODE_BIT:
1083             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1084             /* XXX what other pixel state needs to be set by function calls? */
1085             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1086             ctx->NewState |= _NEW_PIXEL;
1087             break;
1088          case GL_POINT_BIT:
1089             {
1090                const struct gl_point_attrib *point;
1091                point = (const struct gl_point_attrib *) attr->data;
1092                _mesa_PointSize(point->Size);
1093                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1094                if (ctx->Extensions.EXT_point_parameters) {
1095                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1096                                          point->Params);
1097                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1098                                         point->MinSize);
1099                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1100                                         point->MaxSize);
1101                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1102                                         point->Threshold);
1103                }
1104                if (ctx->Extensions.NV_point_sprite
1105                    || ctx->Extensions.ARB_point_sprite) {
1106                   GLuint u;
1107                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1108                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1109                                    (GLint) point->CoordReplace[u]);
1110                   }
1111                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1112                   if (ctx->Extensions.NV_point_sprite)
1113                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1114                                            ctx->Point.SpriteRMode);
1115                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1116                                         (GLfloat)ctx->Point.SpriteOrigin);
1117                }
1118             }
1119             break;
1120          case GL_POLYGON_BIT:
1121             {
1122                const struct gl_polygon_attrib *polygon;
1123                polygon = (const struct gl_polygon_attrib *) attr->data;
1124                _mesa_CullFace(polygon->CullFaceMode);
1125                _mesa_FrontFace(polygon->FrontFace);
1126                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1127                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1128                _mesa_PolygonOffset(polygon->OffsetFactor,
1129                                    polygon->OffsetUnits);
1130                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1131                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1132                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1133                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1134                                 polygon->OffsetPoint);
1135                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1136                                 polygon->OffsetLine);
1137                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1138                                 polygon->OffsetFill);
1139             }
1140             break;
1141          case GL_POLYGON_STIPPLE_BIT:
1142             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1143             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1144             if (ctx->Driver.PolygonStipple)
1145                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1146             break;
1147          case GL_SCISSOR_BIT:
1148             {
1149                const struct gl_scissor_attrib *scissor;
1150                scissor = (const struct gl_scissor_attrib *) attr->data;
1151                _mesa_Scissor(scissor->X, scissor->Y,
1152                              scissor->Width, scissor->Height);
1153                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1154             }
1155             break;
1156          case GL_STENCIL_BUFFER_BIT:
1157             {
1158                const struct gl_stencil_attrib *stencil;
1159                stencil = (const struct gl_stencil_attrib *) attr->data;
1160                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1161                _mesa_ClearStencil(stencil->Clear);
1162                if (ctx->Extensions.EXT_stencil_two_side) {
1163                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1164                                    stencil->TestTwoSide);
1165                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1166                                              ? GL_BACK : GL_FRONT);
1167                }
1168                /* front state */
1169                _mesa_StencilFuncSeparate(GL_FRONT,
1170                                          stencil->Function[0],
1171                                          stencil->Ref[0],
1172                                          stencil->ValueMask[0]);
1173                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1174                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1175                                        stencil->ZFailFunc[0],
1176                                        stencil->ZPassFunc[0]);
1177                /* back state */
1178                _mesa_StencilFuncSeparate(GL_BACK,
1179                                          stencil->Function[1],
1180                                          stencil->Ref[1],
1181                                          stencil->ValueMask[1]);
1182                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1183                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1184                                        stencil->ZFailFunc[1],
1185                                        stencil->ZPassFunc[1]);
1186             }
1187             break;
1188          case GL_TRANSFORM_BIT:
1189             {
1190                GLuint i;
1191                const struct gl_transform_attrib *xform;
1192                xform = (const struct gl_transform_attrib *) attr->data;
1193                _mesa_MatrixMode(xform->MatrixMode);
1194                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1195                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1196
1197                /* restore clip planes */
1198                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1199                   const GLuint mask = 1 << 1;
1200                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1201                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1202                   if (xform->ClipPlanesEnabled & mask) {
1203                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1204                   }
1205                   else {
1206                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1207                   }
1208                   if (ctx->Driver.ClipPlane)
1209                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1210                }
1211
1212                /* normalize/rescale */
1213                if (xform->Normalize != ctx->Transform.Normalize)
1214                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1215                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1216                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1217                                    ctx->Transform.RescaleNormals);
1218             }
1219             break;
1220          case GL_TEXTURE_BIT:
1221             /* Take care of texture object reference counters */
1222             {
1223                struct texture_state *texstate
1224                   = (struct texture_state *) attr->data;
1225                pop_texture_group(ctx, texstate);
1226                ctx->NewState |= _NEW_TEXTURE;
1227             }
1228             break;
1229          case GL_VIEWPORT_BIT:
1230             {
1231                const struct gl_viewport_attrib *vp;
1232                vp = (const struct gl_viewport_attrib *) attr->data;
1233                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1234                _mesa_DepthRange(vp->Near, vp->Far);
1235             }
1236             break;
1237          case GL_MULTISAMPLE_BIT_ARB:
1238             {
1239                const struct gl_multisample_attrib *ms;
1240                ms = (const struct gl_multisample_attrib *) attr->data;
1241                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1242                                        ms->SampleCoverageInvert);
1243             }
1244             break;
1245
1246          default:
1247             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1248             break;
1249       }
1250
1251       next = attr->next;
1252       FREE( attr->data );
1253       FREE( attr );
1254       attr = next;
1255    }
1256 }
1257
1258
1259 /**
1260  * Helper for incrementing/decrementing vertex buffer object reference
1261  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1262  */
1263 static void
1264 adjust_buffer_object_ref_counts(struct gl_array_attrib *array, GLint step)
1265 {
1266    GLuint i;
1267    array->ArrayObj->Vertex.BufferObj->RefCount += step;
1268    array->ArrayObj->Normal.BufferObj->RefCount += step;
1269    array->ArrayObj->Color.BufferObj->RefCount += step;
1270    array->ArrayObj->SecondaryColor.BufferObj->RefCount += step;
1271    array->ArrayObj->FogCoord.BufferObj->RefCount += step;
1272    array->ArrayObj->Index.BufferObj->RefCount += step;
1273    array->ArrayObj->EdgeFlag.BufferObj->RefCount += step;
1274    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
1275       array->ArrayObj->TexCoord[i].BufferObj->RefCount += step;
1276    for (i = 0; i < VERT_ATTRIB_MAX; i++)
1277       array->ArrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1278
1279    array->ArrayBufferObj->RefCount += step;
1280    array->ElementArrayBufferObj->RefCount += step;
1281 }
1282
1283
1284 /**
1285  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1286  * object refcounts.
1287  */
1288 static void
1289 copy_pixelstore(GLcontext *ctx,
1290                 struct gl_pixelstore_attrib *dst,
1291                 const struct gl_pixelstore_attrib *src)
1292 {
1293    dst->Alignment = src->Alignment;
1294    dst->RowLength = src->RowLength;
1295    dst->SkipPixels = src->SkipPixels;
1296    dst->SkipRows = src->SkipRows;
1297    dst->ImageHeight = src->ImageHeight;
1298    dst->SkipImages = src->SkipImages;
1299    dst->SwapBytes = src->SwapBytes;
1300    dst->LsbFirst = src->LsbFirst;
1301    dst->ClientStorage = src->ClientStorage;
1302    dst->Invert = src->Invert;
1303    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1304 }
1305
1306
1307 #define GL_CLIENT_PACK_BIT (1<<20)
1308 #define GL_CLIENT_UNPACK_BIT (1<<21)
1309
1310
1311 void GLAPIENTRY
1312 _mesa_PushClientAttrib(GLbitfield mask)
1313 {
1314    struct gl_attrib_node *newnode;
1315    struct gl_attrib_node *head;
1316
1317    GET_CURRENT_CONTEXT(ctx);
1318    ASSERT_OUTSIDE_BEGIN_END(ctx);
1319
1320    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1321       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1322       return;
1323    }
1324
1325    /* Build linked list of attribute nodes which save all attribute
1326     * groups specified by the mask.
1327     */
1328    head = NULL;
1329
1330    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1331       struct gl_pixelstore_attrib *attr;
1332       /* packing attribs */
1333       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1334       copy_pixelstore(ctx, attr, &ctx->Pack);
1335       newnode = new_attrib_node( GL_CLIENT_PACK_BIT );
1336       newnode->data = attr;
1337       newnode->next = head;
1338       head = newnode;
1339       /* unpacking attribs */
1340       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1341       copy_pixelstore(ctx, attr, &ctx->Unpack);
1342       newnode = new_attrib_node( GL_CLIENT_UNPACK_BIT );
1343       newnode->data = attr;
1344       newnode->next = head;
1345       head = newnode;
1346    }
1347
1348    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1349       struct gl_array_attrib *attr;
1350       struct gl_array_object *obj;
1351
1352       attr = MALLOC_STRUCT( gl_array_attrib );
1353       obj = MALLOC_STRUCT( gl_array_object );
1354
1355 #if FEATURE_ARB_vertex_buffer_object
1356       /* increment ref counts since we're copying pointers to these objects */
1357       ctx->Array.ArrayBufferObj->RefCount++;
1358       ctx->Array.ElementArrayBufferObj->RefCount++;
1359 #endif
1360
1361       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1362       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1363
1364       attr->ArrayObj = obj;
1365
1366       newnode = new_attrib_node( GL_CLIENT_VERTEX_ARRAY_BIT );
1367       newnode->data = attr;
1368       newnode->next = head;
1369       head = newnode;
1370       /* bump reference counts on buffer objects */
1371       adjust_buffer_object_ref_counts(&ctx->Array, 1);
1372    }
1373
1374    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1375    ctx->ClientAttribStackDepth++;
1376 }
1377
1378
1379
1380
1381 void GLAPIENTRY
1382 _mesa_PopClientAttrib(void)
1383 {
1384    struct gl_attrib_node *node, *next;
1385
1386    GET_CURRENT_CONTEXT(ctx);
1387    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1388
1389    if (ctx->ClientAttribStackDepth == 0) {
1390       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1391       return;
1392    }
1393
1394    ctx->ClientAttribStackDepth--;
1395    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1396
1397    while (node) {
1398       switch (node->kind) {
1399          case GL_CLIENT_PACK_BIT:
1400             {
1401                struct gl_pixelstore_attrib *store =
1402                   (struct gl_pixelstore_attrib *) node->data;
1403                copy_pixelstore(ctx, &ctx->Pack, store);
1404                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1405             }
1406             ctx->NewState |= _NEW_PACKUNPACK;
1407             break;
1408          case GL_CLIENT_UNPACK_BIT:
1409             {
1410                struct gl_pixelstore_attrib *store =
1411                   (struct gl_pixelstore_attrib *) node->data;
1412                copy_pixelstore(ctx, &ctx->Unpack, store);
1413                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1414             }
1415             ctx->NewState |= _NEW_PACKUNPACK;
1416             break;
1417          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1418             struct gl_array_attrib * data =
1419               (struct gl_array_attrib *) node->data;
1420
1421             adjust_buffer_object_ref_counts(&ctx->Array, -1);
1422
1423             ctx->Array.ActiveTexture = data->ActiveTexture;
1424             if (data->LockCount != 0)
1425                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1426             else if (ctx->Array.LockCount)
1427                _mesa_UnlockArraysEXT();
1428
1429             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1430
1431 #if FEATURE_ARB_vertex_buffer_object
1432             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1433                                 data->ArrayBufferObj->Name);
1434             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1435                                 data->ElementArrayBufferObj->Name);
1436 #endif
1437
1438             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1439                     sizeof( struct gl_array_object ) );
1440
1441             FREE( data->ArrayObj );
1442
1443             /* FIXME: Should some bits in ctx->Array->NewState also be set
1444              * FIXME: here?  It seems like it should be set to inclusive-or
1445              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1446              */
1447
1448             ctx->NewState |= _NEW_ARRAY;
1449             break;
1450          }
1451          default:
1452             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1453             break;
1454       }
1455
1456       next = node->next;
1457       FREE( node->data );
1458       FREE( node );
1459       node = next;
1460    }
1461 }
1462
1463
1464 /**
1465  * Free any attribute state data that might be attached to the context.
1466  */
1467 void
1468 _mesa_free_attrib_data(GLcontext *ctx)
1469 {
1470    while (ctx->AttribStackDepth > 0) {
1471       struct gl_attrib_node *attr, *next;
1472
1473       ctx->AttribStackDepth--;
1474       attr = ctx->AttribStack[ctx->AttribStackDepth];
1475
1476       while (attr) {
1477          if (attr->kind == GL_TEXTURE_BIT) {
1478             struct texture_state *texstate = (struct texture_state*)attr->data;
1479             GLuint u, tgt;
1480             /* clear references to the saved texture objects */
1481             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1482                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1483                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1484                }
1485             }
1486          }
1487          else {
1488             /* any other chunks of state that requires special handling? */
1489          }
1490
1491          next = attr->next;
1492          _mesa_free(attr->data);
1493          _mesa_free(attr);
1494          attr = next;
1495       }
1496    }
1497 }
1498
1499
1500 void _mesa_init_attrib( GLcontext *ctx )
1501 {
1502    /* Renderer and client attribute stacks */
1503    ctx->AttribStackDepth = 0;
1504    ctx->ClientAttribStackDepth = 0;
1505 }