src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "glheader.h"
  26 #include "imports.h"
  27 #include "accum.h"
  28 #include "arrayobj.h"
  29 #include "attrib.h"
  30 #include "blend.h"
  31 #include "buffers.h"
  32 #include "bufferobj.h"
  33 #include "clear.h"
  34 #include "colormac.h"
  35 #include "colortab.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 "matrix.h"
  45 #include "multisample.h"
  46 #include "points.h"
  47 #include "polygon.h"
  48 #include "scissor.h"
  49 #include "simple_list.h"
  50 #include "stencil.h"
  51 #include "texenv.h"
  52 #include "texgen.h"
  53 #include "texobj.h"
  54 #include "texparam.h"
  55 #include "texstate.h"
  56 #include "varray.h"
  57 #include "mtypes.h"
  58 #include "math/m_xform.h"
  59
  60 /**
  61  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
  62  */
  63 struct texture_state
  64 {
  65    struct gl_texture_attrib Texture;  /**< The usual context state */
  66
  67    /** to save per texture object state (wrap modes, filters, etc): */
  68    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  69
  70    /**
  71     * To save references to texture objects (so they don't get accidentally
  72     * deleted while saved in the attribute stack).
  73     */
  74    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  75 };
  76
  77
  78 /**
  79  * Allocate a new attribute state node.  These nodes have a
  80  * "kind" value and a pointer to a struct of state data.
  81  */
  82 static struct gl_attrib_node *
  83 new_attrib_node( GLbitfield kind )
  84 {
  85    struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
  86    if (an) {
  87       an->kind = kind;
  88    }
  89    return an;
  90 }
  91
  92
  93 void GLAPIENTRY
  94 _mesa_PushAttrib(GLbitfield mask)
  95 {
  96    struct gl_attrib_node *newnode;
  97    struct gl_attrib_node *head;
  98
  99    GET_CURRENT_CONTEXT(ctx);
 100    ASSERT_OUTSIDE_BEGIN_END(ctx);
 101
 102    if (MESA_VERBOSE & VERBOSE_API)
 103       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 104
 105    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 106       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 107       return;
 108    }
 109
 110    /* Build linked list of attribute nodes which save all attribute */
 111    /* groups specified by the mask. */
 112    head = NULL;
 113
 114    if (mask & GL_ACCUM_BUFFER_BIT) {
 115       struct gl_accum_attrib *attr;
 116       attr = MALLOC_STRUCT( gl_accum_attrib );
 117       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 118       newnode = new_attrib_node( GL_ACCUM_BUFFER_BIT );
 119       newnode->data = attr;
 120       newnode->next = head;
 121       head = newnode;
 122    }
 123
 124    if (mask & GL_COLOR_BUFFER_BIT) {
 125       GLuint i;
 126       struct gl_colorbuffer_attrib *attr;
 127       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 128       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 129       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 130       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 131          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 132       newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
 133       newnode->data = attr;
 134       newnode->next = head;
 135       head = newnode;
 136    }
 137
 138    if (mask & GL_CURRENT_BIT) {
 139       struct gl_current_attrib *attr;
 140       FLUSH_CURRENT( ctx, 0 );
 141       attr = MALLOC_STRUCT( gl_current_attrib );
 142       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 143       newnode = new_attrib_node( GL_CURRENT_BIT );
 144       newnode->data = attr;
 145       newnode->next = head;
 146       head = newnode;
 147    }
 148
 149    if (mask & GL_DEPTH_BUFFER_BIT) {
 150       struct gl_depthbuffer_attrib *attr;
 151       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 152       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 153       newnode = new_attrib_node( GL_DEPTH_BUFFER_BIT );
 154       newnode->data = attr;
 155       newnode->next = head;
 156       head = newnode;
 157    }
 158
 159    if (mask & GL_ENABLE_BIT) {
 160       struct gl_enable_attrib *attr;
 161       GLuint i;
 162       attr = MALLOC_STRUCT( gl_enable_attrib );
 163       /* Copy enable flags from all other attributes into the enable struct. */
 164       attr->AlphaTest = ctx->Color.AlphaEnabled;
 165       attr->AutoNormal = ctx->Eval.AutoNormal;
 166       attr->Blend = ctx->Color.BlendEnabled;
 167       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 168       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 169       for (i = 0; i < COLORTABLE_MAX; i++) {
 170          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 171       }
 172       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 173       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 174       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 175       attr->CullFace = ctx->Polygon.CullFlag;
 176       attr->DepthTest = ctx->Depth.Test;
 177       attr->Dither = ctx->Color.DitherFlag;
 178       attr->Fog = ctx->Fog.Enabled;
 179       for (i = 0; i < ctx->Const.MaxLights; i++) {
 180          attr->Light[i] = ctx->Light.Light[i].Enabled;
 181       }
 182       attr->Lighting = ctx->Light.Enabled;
 183       attr->LineSmooth = ctx->Line.SmoothFlag;
 184       attr->LineStipple = ctx->Line.StippleFlag;
 185       attr->Histogram = ctx->Pixel.HistogramEnabled;
 186       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 187       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 188       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 189       attr->Map1Color4 = ctx->Eval.Map1Color4;
 190       attr->Map1Index = ctx->Eval.Map1Index;
 191       attr->Map1Normal = ctx->Eval.Map1Normal;
 192       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 193       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 194       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 195       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 196       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 197       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 198       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 199       attr->Map2Color4 = ctx->Eval.Map2Color4;
 200       attr->Map2Index = ctx->Eval.Map2Index;
 201       attr->Map2Normal = ctx->Eval.Map2Normal;
 202       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 203       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 204       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 205       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 206       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 207       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 208       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 209       attr->Normalize = ctx->Transform.Normalize;
 210       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 211       attr->PointSmooth = ctx->Point.SmoothFlag;
 212       attr->PointSprite = ctx->Point.PointSprite;
 213       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 214       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 215       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 216       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 217       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 218       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 219       attr->Scissor = ctx->Scissor.Enabled;
 220       attr->Stencil = ctx->Stencil.Enabled;
 221       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 222       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 223       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 224       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 225       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 226       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 227       for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 228          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 229          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 230          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 231       }
 232       /* GL_NV_vertex_program */
 233       attr->VertexProgram = ctx->VertexProgram.Enabled;
 234       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 235       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 236       newnode = new_attrib_node( GL_ENABLE_BIT );
 237       newnode->data = attr;
 238       newnode->next = head;
 239       head = newnode;
 240    }
 241
 242    if (mask & GL_EVAL_BIT) {
 243       struct gl_eval_attrib *attr;
 244       attr = MALLOC_STRUCT( gl_eval_attrib );
 245       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 246       newnode = new_attrib_node( GL_EVAL_BIT );
 247       newnode->data = attr;
 248       newnode->next = head;
 249       head = newnode;
 250    }
 251
 252    if (mask & GL_FOG_BIT) {
 253       struct gl_fog_attrib *attr;
 254       attr = MALLOC_STRUCT( gl_fog_attrib );
 255       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 256       newnode = new_attrib_node( GL_FOG_BIT );
 257       newnode->data = attr;
 258       newnode->next = head;
 259       head = newnode;
 260    }
 261
 262    if (mask & GL_HINT_BIT) {
 263       struct gl_hint_attrib *attr;
 264       attr = MALLOC_STRUCT( gl_hint_attrib );
 265       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 266       newnode = new_attrib_node( GL_HINT_BIT );
 267       newnode->data = attr;
 268       newnode->next = head;
 269       head = newnode;
 270    }
 271
 272    if (mask & GL_LIGHTING_BIT) {
 273       struct gl_light_attrib *attr;
 274       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 275       attr = MALLOC_STRUCT( gl_light_attrib );
 276       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 277       newnode = new_attrib_node( GL_LIGHTING_BIT );
 278       newnode->data = attr;
 279       newnode->next = head;
 280       head = newnode;
 281    }
 282
 283    if (mask & GL_LINE_BIT) {
 284       struct gl_line_attrib *attr;
 285       attr = MALLOC_STRUCT( gl_line_attrib );
 286       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 287       newnode = new_attrib_node( GL_LINE_BIT );
 288       newnode->data = attr;
 289       newnode->next = head;
 290       head = newnode;
 291    }
 292
 293    if (mask & GL_LIST_BIT) {
 294       struct gl_list_attrib *attr;
 295       attr = MALLOC_STRUCT( gl_list_attrib );
 296       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 297       newnode = new_attrib_node( GL_LIST_BIT );
 298       newnode->data = attr;
 299       newnode->next = head;
 300       head = newnode;
 301    }
 302
 303    if (mask & GL_PIXEL_MODE_BIT) {
 304       struct gl_pixel_attrib *attr;
 305       attr = MALLOC_STRUCT( gl_pixel_attrib );
 306       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 307       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 308       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 309       newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
 310       newnode->data = attr;
 311       newnode->next = head;
 312       head = newnode;
 313    }
 314
 315    if (mask & GL_POINT_BIT) {
 316       struct gl_point_attrib *attr;
 317       attr = MALLOC_STRUCT( gl_point_attrib );
 318       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 319       newnode = new_attrib_node( GL_POINT_BIT );
 320       newnode->data = attr;
 321       newnode->next = head;
 322       head = newnode;
 323    }
 324
 325    if (mask & GL_POLYGON_BIT) {
 326       struct gl_polygon_attrib *attr;
 327       attr = MALLOC_STRUCT( gl_polygon_attrib );
 328       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 329       newnode = new_attrib_node( GL_POLYGON_BIT );
 330       newnode->data = attr;
 331       newnode->next = head;
 332       head = newnode;
 333    }
 334
 335    if (mask & GL_POLYGON_STIPPLE_BIT) {
 336       GLuint *stipple;
 337       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 338       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 339       newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
 340       newnode->data = stipple;
 341       newnode->next = head;
 342       head = newnode;
 343    }
 344
 345    if (mask & GL_SCISSOR_BIT) {
 346       struct gl_scissor_attrib *attr;
 347       attr = MALLOC_STRUCT( gl_scissor_attrib );
 348       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 349       newnode = new_attrib_node( GL_SCISSOR_BIT );
 350       newnode->data = attr;
 351       newnode->next = head;
 352       head = newnode;
 353    }
 354
 355    if (mask & GL_STENCIL_BUFFER_BIT) {
 356       struct gl_stencil_attrib *attr;
 357       attr = MALLOC_STRUCT( gl_stencil_attrib );
 358       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 359       newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
 360       newnode->data = attr;
 361       newnode->next = head;
 362       head = newnode;
 363    }
 364
 365    if (mask & GL_TEXTURE_BIT) {
 366       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 367       GLuint u;
 368
 369       if (!texstate) {
 370          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 371          goto end;
 372       }
 373
 374       _mesa_lock_context_textures(ctx);
 375
 376       /* copy/save the bulk of texture state here */
 377       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 378
 379       /* Save references to the currently bound texture objects so they don't
 380        * accidentally get deleted while referenced in the attribute stack.
 381        */
 382       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 383          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_INDEX],
 384                                 ctx->Texture.Unit[u].Current1D);
 385          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_INDEX],
 386                                 ctx->Texture.Unit[u].Current2D);
 387          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_3D_INDEX],
 388                                 ctx->Texture.Unit[u].Current3D);
 389          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_CUBE_INDEX],
 390                                 ctx->Texture.Unit[u].CurrentCubeMap);
 391          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_RECT_INDEX],
 392                                 ctx->Texture.Unit[u].CurrentRect);
 393          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_ARRAY_INDEX],
 394                                 ctx->Texture.Unit[u].Current1DArray);
 395          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_ARRAY_INDEX],
 396                                 ctx->Texture.Unit[u].Current2DArray);
 397       }
 398
 399       /* copy state/contents of the currently bound texture objects */
 400       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 401          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_INDEX],
 402                                    ctx->Texture.Unit[u].Current1D);
 403          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_INDEX],
 404                                    ctx->Texture.Unit[u].Current2D);
 405          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_3D_INDEX],
 406                                    ctx->Texture.Unit[u].Current3D);
 407          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_CUBE_INDEX],
 408                                    ctx->Texture.Unit[u].CurrentCubeMap);
 409          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_RECT_INDEX],
 410                                    ctx->Texture.Unit[u].CurrentRect);
 411          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_ARRAY_INDEX],
 412                                    ctx->Texture.Unit[u].Current1DArray);
 413          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_ARRAY_INDEX],
 414                                    ctx->Texture.Unit[u].Current2DArray);
 415       }
 416
 417       _mesa_unlock_context_textures(ctx);
 418
 419       newnode = new_attrib_node( GL_TEXTURE_BIT );
 420       newnode->data = texstate;
 421       newnode->next = head;
 422       head = newnode;
 423    }
 424
 425    if (mask & GL_TRANSFORM_BIT) {
 426       struct gl_transform_attrib *attr;
 427       attr = MALLOC_STRUCT( gl_transform_attrib );
 428       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 429       newnode = new_attrib_node( GL_TRANSFORM_BIT );
 430       newnode->data = attr;
 431       newnode->next = head;
 432       head = newnode;
 433    }
 434
 435    if (mask & GL_VIEWPORT_BIT) {
 436       struct gl_viewport_attrib *attr;
 437       attr = MALLOC_STRUCT( gl_viewport_attrib );
 438       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 439       newnode = new_attrib_node( GL_VIEWPORT_BIT );
 440       newnode->data = attr;
 441       newnode->next = head;
 442       head = newnode;
 443    }
 444
 445    /* GL_ARB_multisample */
 446    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 447       struct gl_multisample_attrib *attr;
 448       attr = MALLOC_STRUCT( gl_multisample_attrib );
 449       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 450       newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
 451       newnode->data = attr;
 452       newnode->next = head;
 453       head = newnode;
 454    }
 455
 456 end:
 457    ctx->AttribStack[ctx->AttribStackDepth] = head;
 458    ctx->AttribStackDepth++;
 459 }
 460
 461
 462
 463 static void
 464 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 465 {
 466    GLuint i;
 467
 468 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 469         if ((VALUE) != (NEWVALUE)) {                    \
 470            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 471         }
 472
 473    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 474    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 475
 476    for (i=0;i<MAX_CLIP_PLANES;i++) {
 477       const GLuint mask = 1 << i;
 478       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 479           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 480                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 481    }
 482
 483    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 484                    GL_COLOR_MATERIAL);
 485    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 486                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 487                    GL_COLOR_TABLE);
 488    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 489                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 490                    GL_POST_CONVOLUTION_COLOR_TABLE);
 491    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 492                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 493                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 494    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 495    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 496    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 497    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 498                    GL_CONVOLUTION_1D);
 499    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 500                    GL_CONVOLUTION_2D);
 501    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 502                    GL_SEPARABLE_2D);
 503    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 504    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 505    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 506    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 507                    GL_LINE_STIPPLE);
 508    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 509                    GL_INDEX_LOGIC_OP);
 510    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 511                    GL_COLOR_LOGIC_OP);
 512
 513    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 514    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 515    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 516    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 517                    GL_MAP1_TEXTURE_COORD_1);
 518    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 519                    GL_MAP1_TEXTURE_COORD_2);
 520    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 521                    GL_MAP1_TEXTURE_COORD_3);
 522    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 523                    GL_MAP1_TEXTURE_COORD_4);
 524    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 525                    GL_MAP1_VERTEX_3);
 526    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 527                    GL_MAP1_VERTEX_4);
 528    for (i = 0; i < 16; i++) {
 529       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 530                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 531    }
 532
 533    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 534    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 535    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 536    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 537                    GL_MAP2_TEXTURE_COORD_1);
 538    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 539                    GL_MAP2_TEXTURE_COORD_2);
 540    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 541                    GL_MAP2_TEXTURE_COORD_3);
 542    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 543                    GL_MAP2_TEXTURE_COORD_4);
 544    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 545                    GL_MAP2_VERTEX_3);
 546    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 547                    GL_MAP2_VERTEX_4);
 548    for (i = 0; i < 16; i++) {
 549       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 550                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 551    }
 552
 553    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 554    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 555    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 556                    GL_RESCALE_NORMAL_EXT);
 557    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 558                    enable->RasterPositionUnclipped,
 559                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 560    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 561                    GL_POINT_SMOOTH);
 562    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 563       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 564                       GL_POINT_SPRITE_NV);
 565    }
 566    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 567                    GL_POLYGON_OFFSET_POINT);
 568    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 569                    GL_POLYGON_OFFSET_LINE);
 570    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 571                    GL_POLYGON_OFFSET_FILL);
 572    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 573                    GL_POLYGON_SMOOTH);
 574    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 575                    GL_POLYGON_STIPPLE);
 576    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 577    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 578    if (ctx->Extensions.EXT_stencil_two_side) {
 579       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 580    }
 581    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 582                    GL_MULTISAMPLE_ARB);
 583    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 584                    enable->SampleAlphaToCoverage,
 585                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 586    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 587                    enable->SampleAlphaToOne,
 588                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 589    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 590                    enable->SampleCoverage,
 591                    GL_SAMPLE_COVERAGE_ARB);
 592    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 593                    enable->SampleCoverageInvert,
 594                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 595    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 596    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 597                    enable->VertexProgram,
 598                    GL_VERTEX_PROGRAM_ARB);
 599    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 600                    enable->VertexProgramPointSize,
 601                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 602    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 603                    enable->VertexProgramTwoSide,
 604                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 605
 606 #undef TEST_AND_UPDATE
 607
 608    /* texture unit enables */
 609    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 610       if (ctx->Texture.Unit[i].Enabled != enable->Texture[i]) {
 611          ctx->Texture.Unit[i].Enabled = enable->Texture[i];
 612          if (ctx->Driver.Enable) {
 613             if (ctx->Driver.ActiveTexture) {
 614                (*ctx->Driver.ActiveTexture)(ctx, i);
 615             }
 616             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_1D,
 617                              (GLboolean) (enable->Texture[i] & TEXTURE_1D_BIT) );
 618             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_2D,
 619                              (GLboolean) (enable->Texture[i] & TEXTURE_2D_BIT) );
 620             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_3D,
 621                              (GLboolean) (enable->Texture[i] & TEXTURE_3D_BIT) );
 622             if (ctx->Extensions.ARB_texture_cube_map)
 623                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_CUBE_MAP_ARB,
 624                           (GLboolean) (enable->Texture[i] & TEXTURE_CUBE_BIT) );
 625             if (ctx->Extensions.NV_texture_rectangle)
 626                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_RECTANGLE_NV,
 627                           (GLboolean) (enable->Texture[i] & TEXTURE_RECT_BIT) );
 628          }
 629       }
 630
 631       if (ctx->Texture.Unit[i].TexGenEnabled != enable->TexGen[i]) {
 632          ctx->Texture.Unit[i].TexGenEnabled = enable->TexGen[i];
 633          if (ctx->Driver.Enable) {
 634             if (ctx->Driver.ActiveTexture) {
 635                (*ctx->Driver.ActiveTexture)(ctx, i);
 636             }
 637             if (enable->TexGen[i] & S_BIT)
 638                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_TRUE);
 639             else
 640                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_FALSE);
 641             if (enable->TexGen[i] & T_BIT)
 642                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_TRUE);
 643             else
 644                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_FALSE);
 645             if (enable->TexGen[i] & R_BIT)
 646                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_TRUE);
 647             else
 648                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_FALSE);
 649             if (enable->TexGen[i] & Q_BIT)
 650                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
 651             else
 652                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
 653          }
 654       }
 655
 656       /* GL_SGI_texture_color_table */
 657       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 658    }
 659
 660    if (ctx->Driver.ActiveTexture) {
 661       (*ctx->Driver.ActiveTexture)(ctx, ctx->Texture.CurrentUnit);
 662    }
 663 }
 664
 665
 666 /**
 667  * Pop/restore texture attribute/group state.
 668  */
 669 static void
 670 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 671 {
 672    GLuint u;
 673
 674    _mesa_lock_context_textures(ctx);
 675
 676    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 677       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 678       GLuint tgt;
 679
 680       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 681       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 682                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 683       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 684                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 685       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 686                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 687       if (ctx->Extensions.ARB_texture_cube_map) {
 688          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 689                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 690       }
 691       if (ctx->Extensions.NV_texture_rectangle) {
 692          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 693                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 694       }
 695       if (ctx->Extensions.SGI_texture_color_table) {
 696          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 697                           unit->ColorTableEnabled);
 698       }
 699       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 700       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 701       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenModeS);
 702       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenModeT);
 703       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenModeR);
 704       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenModeQ);
 705       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->ObjectPlaneS);
 706       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->ObjectPlaneT);
 707       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->ObjectPlaneR);
 708       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->ObjectPlaneQ);
 709       /* Eye plane done differently to avoid re-transformation */
 710       {
 711          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 712          COPY_4FV(destUnit->EyePlaneS, unit->EyePlaneS);
 713          COPY_4FV(destUnit->EyePlaneT, unit->EyePlaneT);
 714          COPY_4FV(destUnit->EyePlaneR, unit->EyePlaneR);
 715          COPY_4FV(destUnit->EyePlaneQ, unit->EyePlaneQ);
 716          if (ctx->Driver.TexGen) {
 717             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->EyePlaneS);
 718             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->EyePlaneT);
 719             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->EyePlaneR);
 720             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->EyePlaneQ);
 721          }
 722       }
 723       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 724                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 725       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 726                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 727       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 728                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 729       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 730                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 731       if (ctx->Extensions.EXT_texture_lod_bias) {
 732          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 733                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 734       }
 735       if (ctx->Extensions.EXT_texture_env_combine ||
 736           ctx->Extensions.ARB_texture_env_combine) {
 737          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 738                        unit->Combine.ModeRGB);
 739          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 740                        unit->Combine.ModeA);
 741          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 742                        unit->Combine.SourceRGB[0]);
 743          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 744                        unit->Combine.SourceRGB[1]);
 745          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 746                        unit->Combine.SourceRGB[2]);
 747          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 748                        unit->Combine.SourceA[0]);
 749          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 750                        unit->Combine.SourceA[1]);
 751          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 752                        unit->Combine.SourceA[2]);
 753          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 754                        unit->Combine.OperandRGB[0]);
 755          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 756                        unit->Combine.OperandRGB[1]);
 757          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 758                        unit->Combine.OperandRGB[2]);
 759          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 760                        unit->Combine.OperandA[0]);
 761          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 762                        unit->Combine.OperandA[1]);
 763          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 764                        unit->Combine.OperandA[2]);
 765          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 766                        1 << unit->Combine.ScaleShiftRGB);
 767          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 768                        1 << unit->Combine.ScaleShiftA);
 769       }
 770
 771       /* Restore texture object state for each target */
 772       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 773          const struct gl_texture_object *obj = NULL;
 774          GLfloat bordColor[4];
 775          GLenum target;
 776
 777          obj = &texstate->SavedObj[u][tgt];
 778
 779          /* don't restore state for unsupported targets to prevent
 780           * raising GL errors.
 781           */
 782          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 783              !ctx->Extensions.ARB_texture_cube_map) {
 784             continue;
 785          }
 786          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 787                   !ctx->Extensions.NV_texture_rectangle) {
 788             continue;
 789          }
 790          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 791                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 792                   !ctx->Extensions.MESA_texture_array) {
 793             continue;
 794          }
 795
 796          target = obj->Target;
 797
 798          _mesa_BindTexture(target, obj->Name);
 799
 800          bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
 801          bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
 802          bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
 803          bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
 804
 805          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
 806          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 807          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 808          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 809          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 810          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 811          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 812          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 813          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 814          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 815          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 816          if (target != GL_TEXTURE_RECTANGLE_ARB)
 817             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 818          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 819             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 820                                 obj->MaxAnisotropy);
 821          }
 822          if (ctx->Extensions.SGIX_shadow) {
 823             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
 824                                 obj->CompareFlag);
 825             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
 826                                 obj->CompareOperator);
 827          }
 828          if (ctx->Extensions.SGIX_shadow_ambient) {
 829             _mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
 830                                 obj->ShadowAmbient);
 831          }
 832       }
 833
 834       /* remove saved references to the texture objects */
 835       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 836          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 837       }
 838    }
 839
 840    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 841
 842    _mesa_unlock_context_textures(ctx);
 843 }
 844
 845
 846 /*
 847  * This function is kind of long just because we have to call a lot
 848  * of device driver functions to update device driver state.
 849  *
 850  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 851  * in order to restore GL state.  This isn't terribly efficient but it
 852  * ensures that dirty flags and any derived state gets updated correctly.
 853  * We could at least check if the value to restore equals the current value
 854  * and then skip the Mesa call.
 855  */
 856 void GLAPIENTRY
 857 _mesa_PopAttrib(void)
 858 {
 859    struct gl_attrib_node *attr, *next;
 860    GET_CURRENT_CONTEXT(ctx);
 861    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 862
 863    if (ctx->AttribStackDepth == 0) {
 864       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 865       return;
 866    }
 867
 868    ctx->AttribStackDepth--;
 869    attr = ctx->AttribStack[ctx->AttribStackDepth];
 870
 871    while (attr) {
 872
 873       if (MESA_VERBOSE & VERBOSE_API) {
 874          _mesa_debug(ctx, "glPopAttrib %s\n",
 875                      _mesa_lookup_enum_by_nr(attr->kind));
 876       }
 877
 878       switch (attr->kind) {
 879          case GL_ACCUM_BUFFER_BIT:
 880             {
 881                const struct gl_accum_attrib *accum;
 882                accum = (const struct gl_accum_attrib *) attr->data;
 883                _mesa_ClearAccum(accum->ClearColor[0],
 884                                 accum->ClearColor[1],
 885                                 accum->ClearColor[2],
 886                                 accum->ClearColor[3]);
 887             }
 888             break;
 889          case GL_COLOR_BUFFER_BIT:
 890             {
 891                const struct gl_colorbuffer_attrib *color;
 892                color = (const struct gl_colorbuffer_attrib *) attr->data;
 893                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 894                _mesa_ClearColor(color->ClearColor[0],
 895                                 color->ClearColor[1],
 896                                 color->ClearColor[2],
 897                                 color->ClearColor[3]);
 898                _mesa_IndexMask(color->IndexMask);
 899                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 900                                (GLboolean) (color->ColorMask[1] != 0),
 901                                (GLboolean) (color->ColorMask[2] != 0),
 902                                (GLboolean) (color->ColorMask[3] != 0));
 903                {
 904                   /* Need to determine if more than one color output is
 905                    * specified.  If so, call glDrawBuffersARB, else call
 906                    * glDrawBuffer().  This is a subtle, but essential point
 907                    * since GL_FRONT (for example) is illegal for the former
 908                    * function, but legal for the later.
 909                    */
 910                   GLboolean multipleBuffers = GL_FALSE;
 911                   if (ctx->Extensions.ARB_draw_buffers) {
 912                      GLuint i;
 913                      for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 914                         if (color->DrawBuffer[i] != GL_NONE) {
 915                            multipleBuffers = GL_TRUE;
 916                            break;
 917                         }
 918                      }
 919                   }
 920                   /* Call the API_level functions, not _mesa_drawbuffers()
 921                    * since we need to do error checking on the pop'd
 922                    * GL_DRAW_BUFFER.
 923                    * Ex: if GL_FRONT were pushed, but we're popping with a
 924                    * user FBO bound, GL_FRONT will be illegal and we'll need
 925                    * to record that error.  Per OpenGL ARB decision.
 926                    */
 927                   if (multipleBuffers)
 928                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 929                                           color->DrawBuffer);
 930                   else
 931                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 932                }
 933                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 934                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 935                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
 936                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 937                                           color->BlendDstRGB,
 938                                           color->BlendSrcA,
 939                                           color->BlendDstA);
 940                /* This special case is because glBlendEquationSeparateEXT
 941                 * cannot take GL_LOGIC_OP as a parameter.
 942                 */
 943                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 944                   _mesa_BlendEquation(color->BlendEquationRGB);
 945                }
 946                else {
 947                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 948                                                  color->BlendEquationA);
 949                }
 950                _mesa_BlendColor(color->BlendColor[0],
 951                                 color->BlendColor[1],
 952                                 color->BlendColor[2],
 953                                 color->BlendColor[3]);
 954                _mesa_LogicOp(color->LogicOp);
 955                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 956                                 color->ColorLogicOpEnabled);
 957                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 958                                 color->IndexLogicOpEnabled);
 959                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 960             }
 961             break;
 962          case GL_CURRENT_BIT:
 963             FLUSH_CURRENT( ctx, 0 );
 964             MEMCPY( &ctx->Current, attr->data,
 965                     sizeof(struct gl_current_attrib) );
 966             break;
 967          case GL_DEPTH_BUFFER_BIT:
 968             {
 969                const struct gl_depthbuffer_attrib *depth;
 970                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 971                _mesa_DepthFunc(depth->Func);
 972                _mesa_ClearDepth(depth->Clear);
 973                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 974                _mesa_DepthMask(depth->Mask);
 975             }
 976             break;
 977          case GL_ENABLE_BIT:
 978             {
 979                const struct gl_enable_attrib *enable;
 980                enable = (const struct gl_enable_attrib *) attr->data;
 981                pop_enable_group(ctx, enable);
 982                ctx->NewState |= _NEW_ALL;
 983             }
 984             break;
 985          case GL_EVAL_BIT:
 986             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 987             ctx->NewState |= _NEW_EVAL;
 988             break;
 989          case GL_FOG_BIT:
 990             {
 991                const struct gl_fog_attrib *fog;
 992                fog = (const struct gl_fog_attrib *) attr->data;
 993                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 994                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 995                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 996                _mesa_Fogf(GL_FOG_START, fog->Start);
 997                _mesa_Fogf(GL_FOG_END, fog->End);
 998                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
 999                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1000             }
1001             break;
1002          case GL_HINT_BIT:
1003             {
1004                const struct gl_hint_attrib *hint;
1005                hint = (const struct gl_hint_attrib *) attr->data;
1006                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1007                           hint->PerspectiveCorrection );
1008                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1009                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1010                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1011                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1012                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1013                           hint->ClipVolumeClipping);
1014                if (ctx->Extensions.ARB_texture_compression)
1015                   _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1016                              hint->TextureCompression);
1017             }
1018             break;
1019          case GL_LIGHTING_BIT:
1020             {
1021                GLuint i;
1022                const struct gl_light_attrib *light;
1023                light = (const struct gl_light_attrib *) attr->data;
1024                /* lighting enable */
1025                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1026                /* per-light state */
1027                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1028                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1029
1030                for (i = 0; i < ctx->Const.MaxLights; i++) {
1031                   const struct gl_light *l = &light->Light[i];
1032                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1033                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1034                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1035                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1036                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1037                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->EyeDirection);
1038                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1039                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1040                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1041                               &l->ConstantAttenuation);
1042                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1043                               &l->LinearAttenuation);
1044                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1045                               &l->QuadraticAttenuation);
1046                }
1047                /* light model */
1048                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1049                                   light->Model.Ambient);
1050                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1051                                  (GLfloat) light->Model.LocalViewer);
1052                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1053                                  (GLfloat) light->Model.TwoSide);
1054                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1055                                  (GLfloat) light->Model.ColorControl);
1056                /* shade model */
1057                _mesa_ShadeModel(light->ShadeModel);
1058                /* color material */
1059                _mesa_ColorMaterial(light->ColorMaterialFace,
1060                                    light->ColorMaterialMode);
1061                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1062                                 light->ColorMaterialEnabled);
1063                /* materials */
1064                MEMCPY(&ctx->Light.Material, &light->Material,
1065                       sizeof(struct gl_material));
1066             }
1067             break;
1068          case GL_LINE_BIT:
1069             {
1070                const struct gl_line_attrib *line;
1071                line = (const struct gl_line_attrib *) attr->data;
1072                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1073                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1074                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1075                _mesa_LineWidth(line->Width);
1076             }
1077             break;
1078          case GL_LIST_BIT:
1079             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1080             break;
1081          case GL_PIXEL_MODE_BIT:
1082             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1083             /* XXX what other pixel state needs to be set by function calls? */
1084             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1085             ctx->NewState |= _NEW_PIXEL;
1086             break;
1087          case GL_POINT_BIT:
1088             {
1089                const struct gl_point_attrib *point;
1090                point = (const struct gl_point_attrib *) attr->data;
1091                _mesa_PointSize(point->Size);
1092                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1093                if (ctx->Extensions.EXT_point_parameters) {
1094                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1095                                          point->Params);
1096                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1097                                         point->MinSize);
1098                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1099                                         point->MaxSize);
1100                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1101                                         point->Threshold);
1102                }
1103                if (ctx->Extensions.NV_point_sprite
1104                    || ctx->Extensions.ARB_point_sprite) {
1105                   GLuint u;
1106                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1107                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1108                                    (GLint) point->CoordReplace[u]);
1109                   }
1110                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1111                   if (ctx->Extensions.NV_point_sprite)
1112                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1113                                           ctx->Point.SpriteRMode);
1114                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1115                                            (GLfloat)ctx->Point.SpriteOrigin);
1116                }
1117             }
1118             break;
1119          case GL_POLYGON_BIT:
1120             {
1121                const struct gl_polygon_attrib *polygon;
1122                polygon = (const struct gl_polygon_attrib *) attr->data;
1123                _mesa_CullFace(polygon->CullFaceMode);
1124                _mesa_FrontFace(polygon->FrontFace);
1125                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1126                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1127                _mesa_PolygonOffset(polygon->OffsetFactor,
1128                                    polygon->OffsetUnits);
1129                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1130                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1131                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1132                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1133                                 polygon->OffsetPoint);
1134                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1135                                 polygon->OffsetLine);
1136                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1137                                 polygon->OffsetFill);
1138             }
1139             break;
1140          case GL_POLYGON_STIPPLE_BIT:
1141             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1142             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1143             if (ctx->Driver.PolygonStipple)
1144                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1145             break;
1146          case GL_SCISSOR_BIT:
1147             {
1148                const struct gl_scissor_attrib *scissor;
1149                scissor = (const struct gl_scissor_attrib *) attr->data;
1150                _mesa_Scissor(scissor->X, scissor->Y,
1151                              scissor->Width, scissor->Height);
1152                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1153             }
1154             break;
1155          case GL_STENCIL_BUFFER_BIT:
1156             {
1157                const struct gl_stencil_attrib *stencil;
1158                stencil = (const struct gl_stencil_attrib *) attr->data;
1159                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1160                _mesa_ClearStencil(stencil->Clear);
1161                if (ctx->Extensions.EXT_stencil_two_side) {
1162                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1163                                    stencil->TestTwoSide);
1164                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1165                                              ? GL_BACK : GL_FRONT);
1166                }
1167                /* front state */
1168                _mesa_StencilFuncSeparate(GL_FRONT,
1169                                          stencil->Function[0],
1170                                          stencil->Ref[0],
1171                                          stencil->ValueMask[0]);
1172                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1173                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1174                                        stencil->ZFailFunc[0],
1175                                        stencil->ZPassFunc[0]);
1176                /* back state */
1177                _mesa_StencilFuncSeparate(GL_BACK,
1178                                          stencil->Function[1],
1179                                          stencil->Ref[1],
1180                                          stencil->ValueMask[1]);
1181                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1182                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1183                                        stencil->ZFailFunc[1],
1184                                        stencil->ZPassFunc[1]);
1185             }
1186             break;
1187          case GL_TRANSFORM_BIT:
1188             {
1189                GLuint i;
1190                const struct gl_transform_attrib *xform;
1191                xform = (const struct gl_transform_attrib *) attr->data;
1192                _mesa_MatrixMode(xform->MatrixMode);
1193                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1194                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1195
1196                /* restore clip planes */
1197                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1198                   const GLuint mask = 1 << 1;
1199                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1200                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1201                   if (xform->ClipPlanesEnabled & mask) {
1202                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1203                   }
1204                   else {
1205                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1206                   }
1207                   if (ctx->Driver.ClipPlane)
1208                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1209                }
1210
1211                /* normalize/rescale */
1212                if (xform->Normalize != ctx->Transform.Normalize)
1213                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1214                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1215                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1216                                    ctx->Transform.RescaleNormals);
1217             }
1218             break;
1219          case GL_TEXTURE_BIT:
1220             /* Take care of texture object reference counters */
1221             {
1222                struct texture_state *texstate
1223                   = (struct texture_state *) attr->data;
1224                pop_texture_group(ctx, texstate);
1225                ctx->NewState |= _NEW_TEXTURE;
1226             }
1227             break;
1228          case GL_VIEWPORT_BIT:
1229             {
1230                const struct gl_viewport_attrib *vp;
1231                vp = (const struct gl_viewport_attrib *) attr->data;
1232                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1233                _mesa_DepthRange(vp->Near, vp->Far);
1234             }
1235             break;
1236          case GL_MULTISAMPLE_BIT_ARB:
1237             {
1238                const struct gl_multisample_attrib *ms;
1239                ms = (const struct gl_multisample_attrib *) attr->data;
1240                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1241                                        ms->SampleCoverageInvert);
1242             }
1243             break;
1244
1245          default:
1246             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1247             break;
1248       }
1249
1250       next = attr->next;
1251       FREE( attr->data );
1252       FREE( attr );
1253       attr = next;
1254    }
1255 }
1256
1257
1258 /**
1259  * Helper for incrementing/decrementing vertex buffer object reference
1260  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1261  */
1262 static void
1263 adjust_buffer_object_ref_counts(struct gl_array_attrib *array, GLint step)
1264 {
1265    GLuint i;
1266    array->ArrayObj->Vertex.BufferObj->RefCount += step;
1267    array->ArrayObj->Normal.BufferObj->RefCount += step;
1268    array->ArrayObj->Color.BufferObj->RefCount += step;
1269    array->ArrayObj->SecondaryColor.BufferObj->RefCount += step;
1270    array->ArrayObj->FogCoord.BufferObj->RefCount += step;
1271    array->ArrayObj->Index.BufferObj->RefCount += step;
1272    array->ArrayObj->EdgeFlag.BufferObj->RefCount += step;
1273    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
1274       array->ArrayObj->TexCoord[i].BufferObj->RefCount += step;
1275    for (i = 0; i < VERT_ATTRIB_MAX; i++)
1276       array->ArrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1277
1278    array->ArrayBufferObj->RefCount += step;
1279    array->ElementArrayBufferObj->RefCount += step;
1280 }
1281
1282
1283 /**
1284  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1285  * object refcounts.
1286  */
1287 static void
1288 copy_pixelstore(GLcontext *ctx,
1289                 struct gl_pixelstore_attrib *dst,
1290                 const struct gl_pixelstore_attrib *src)
1291 {
1292    dst->Alignment = src->Alignment;
1293    dst->RowLength = src->RowLength;
1294    dst->SkipPixels = src->SkipPixels;
1295    dst->SkipRows = src->SkipRows;
1296    dst->ImageHeight = src->ImageHeight;
1297    dst->SkipImages = src->SkipImages;
1298    dst->SwapBytes = src->SwapBytes;
1299    dst->LsbFirst = src->LsbFirst;
1300    dst->ClientStorage = src->ClientStorage;
1301    dst->Invert = src->Invert;
1302    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1303 }
1304
1305
1306 #define GL_CLIENT_PACK_BIT (1<<20)
1307 #define GL_CLIENT_UNPACK_BIT (1<<21)
1308
1309
1310 void GLAPIENTRY
1311 _mesa_PushClientAttrib(GLbitfield mask)
1312 {
1313    struct gl_attrib_node *newnode;
1314    struct gl_attrib_node *head;
1315
1316    GET_CURRENT_CONTEXT(ctx);
1317    ASSERT_OUTSIDE_BEGIN_END(ctx);
1318
1319    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1320       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1321       return;
1322    }
1323
1324    /* Build linked list of attribute nodes which save all attribute
1325     * groups specified by the mask.
1326     */
1327    head = NULL;
1328
1329    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1330       struct gl_pixelstore_attrib *attr;
1331       /* packing attribs */
1332       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1333       copy_pixelstore(ctx, attr, &ctx->Pack);
1334       newnode = new_attrib_node( GL_CLIENT_PACK_BIT );
1335       newnode->data = attr;
1336       newnode->next = head;
1337       head = newnode;
1338       /* unpacking attribs */
1339       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1340       copy_pixelstore(ctx, attr, &ctx->Unpack);
1341       newnode = new_attrib_node( GL_CLIENT_UNPACK_BIT );
1342       newnode->data = attr;
1343       newnode->next = head;
1344       head = newnode;
1345    }
1346
1347    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1348       struct gl_array_attrib *attr;
1349       struct gl_array_object *obj;
1350
1351       attr = MALLOC_STRUCT( gl_array_attrib );
1352       obj = MALLOC_STRUCT( gl_array_object );
1353
1354 #if FEATURE_ARB_vertex_buffer_object
1355       /* increment ref counts since we're copying pointers to these objects */
1356       ctx->Array.ArrayBufferObj->RefCount++;
1357       ctx->Array.ElementArrayBufferObj->RefCount++;
1358 #endif
1359
1360       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1361       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1362
1363       attr->ArrayObj = obj;
1364
1365       newnode = new_attrib_node( GL_CLIENT_VERTEX_ARRAY_BIT );
1366       newnode->data = attr;
1367       newnode->next = head;
1368       head = newnode;
1369       /* bump reference counts on buffer objects */
1370       adjust_buffer_object_ref_counts(&ctx->Array, 1);
1371    }
1372
1373    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1374    ctx->ClientAttribStackDepth++;
1375 }
1376
1377
1378
1379
1380 void GLAPIENTRY
1381 _mesa_PopClientAttrib(void)
1382 {
1383    struct gl_attrib_node *node, *next;
1384
1385    GET_CURRENT_CONTEXT(ctx);
1386    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1387
1388    if (ctx->ClientAttribStackDepth == 0) {
1389       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1390       return;
1391    }
1392
1393    ctx->ClientAttribStackDepth--;
1394    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1395
1396    while (node) {
1397       switch (node->kind) {
1398          case GL_CLIENT_PACK_BIT:
1399             {
1400                struct gl_pixelstore_attrib *store =
1401                   (struct gl_pixelstore_attrib *) node->data;
1402                copy_pixelstore(ctx, &ctx->Pack, store);
1403                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1404             }
1405             ctx->NewState |= _NEW_PACKUNPACK;
1406             break;
1407          case GL_CLIENT_UNPACK_BIT:
1408             {
1409                struct gl_pixelstore_attrib *store =
1410                   (struct gl_pixelstore_attrib *) node->data;
1411                copy_pixelstore(ctx, &ctx->Unpack, store);
1412                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1413             }
1414             ctx->NewState |= _NEW_PACKUNPACK;
1415             break;
1416          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1417             struct gl_array_attrib * data =
1418               (struct gl_array_attrib *) node->data;
1419
1420             adjust_buffer_object_ref_counts(&ctx->Array, -1);
1421
1422             ctx->Array.ActiveTexture = data->ActiveTexture;
1423             if (data->LockCount != 0)
1424                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1425             else if (ctx->Array.LockCount)
1426                _mesa_UnlockArraysEXT();
1427
1428             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1429
1430 #if FEATURE_ARB_vertex_buffer_object
1431             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1432                                 data->ArrayBufferObj->Name);
1433             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1434                                 data->ElementArrayBufferObj->Name);
1435 #endif
1436
1437             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1438                     sizeof( struct gl_array_object ) );
1439
1440             FREE( data->ArrayObj );
1441
1442             /* FIXME: Should some bits in ctx->Array->NewState also be set
1443              * FIXME: here?  It seems like it should be set to inclusive-or
1444              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1445              */
1446
1447             ctx->NewState |= _NEW_ARRAY;
1448             break;
1449          }
1450          default:
1451             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1452             break;
1453       }
1454
1455       next = node->next;
1456       FREE( node->data );
1457       FREE( node );
1458       node = next;
1459    }
1460 }
1461
1462
1463 /**
1464  * Free any attribute state data that might be attached to the context.
1465  */
1466 void
1467 _mesa_free_attrib_data(GLcontext *ctx)
1468 {
1469    while (ctx->AttribStackDepth > 0) {
1470       struct gl_attrib_node *attr, *next;
1471
1472       ctx->AttribStackDepth--;
1473       attr = ctx->AttribStack[ctx->AttribStackDepth];
1474
1475       while (attr) {
1476          if (attr->kind == GL_TEXTURE_BIT) {
1477             struct texture_state *texstate = (struct texture_state*)attr->data;
1478             GLuint u, tgt;
1479             /* clear references to the saved texture objects */
1480             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1481                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1482                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1483                }
1484             }
1485          }
1486          else {
1487             /* any other chunks of state that requires special handling? */
1488          }
1489
1490          next = attr->next;
1491          _mesa_free(attr->data);
1492          _mesa_free(attr);
1493          attr = next;
1494       }
1495    }
1496 }
1497
1498
1499 void _mesa_init_attrib( GLcontext *ctx )
1500 {
1501    /* Renderer and client attribute stacks */
1502    ctx->AttribStackDepth = 0;
1503    ctx->ClientAttribStackDepth = 0;
1504 }