src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "glheader.h"
  27 #include "imports.h"
  28 #include "accum.h"
  29 #include "arrayobj.h"
  30 #include "attrib.h"
  31 #include "blend.h"
  32 #include "buffers.h"
  33 #include "bufferobj.h"
  34 #include "clear.h"
  35 #include "colormac.h"
  36 #include "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 "viewport.h"
  59 #include "mtypes.h"
  60
  61
  62 /**
  63  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  64  */
  65 struct gl_enable_attrib
  66 {
  67    GLboolean AlphaTest;
  68    GLboolean AutoNormal;
  69    GLboolean Blend;
  70    GLbitfield ClipPlanes;
  71    GLboolean ColorMaterial;
  72    GLboolean ColorTable[COLORTABLE_MAX];
  73    GLboolean Convolution1D;
  74    GLboolean Convolution2D;
  75    GLboolean Separable2D;
  76    GLboolean CullFace;
  77    GLboolean DepthClamp;
  78    GLboolean DepthTest;
  79    GLboolean Dither;
  80    GLboolean Fog;
  81    GLboolean Histogram;
  82    GLboolean Light[MAX_LIGHTS];
  83    GLboolean Lighting;
  84    GLboolean LineSmooth;
  85    GLboolean LineStipple;
  86    GLboolean IndexLogicOp;
  87    GLboolean ColorLogicOp;
  88
  89    GLboolean Map1Color4;
  90    GLboolean Map1Index;
  91    GLboolean Map1Normal;
  92    GLboolean Map1TextureCoord1;
  93    GLboolean Map1TextureCoord2;
  94    GLboolean Map1TextureCoord3;
  95    GLboolean Map1TextureCoord4;
  96    GLboolean Map1Vertex3;
  97    GLboolean Map1Vertex4;
  98    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
  99    GLboolean Map2Color4;
 100    GLboolean Map2Index;
 101    GLboolean Map2Normal;
 102    GLboolean Map2TextureCoord1;
 103    GLboolean Map2TextureCoord2;
 104    GLboolean Map2TextureCoord3;
 105    GLboolean Map2TextureCoord4;
 106    GLboolean Map2Vertex3;
 107    GLboolean Map2Vertex4;
 108    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 109
 110    GLboolean MinMax;
 111    GLboolean Normalize;
 112    GLboolean PixelTexture;
 113    GLboolean PointSmooth;
 114    GLboolean PolygonOffsetPoint;
 115    GLboolean PolygonOffsetLine;
 116    GLboolean PolygonOffsetFill;
 117    GLboolean PolygonSmooth;
 118    GLboolean PolygonStipple;
 119    GLboolean RescaleNormals;
 120    GLboolean Scissor;
 121    GLboolean Stencil;
 122    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 123    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 124    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 125    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 126    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 127    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 128    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 129
 130    GLbitfield Texture[MAX_TEXTURE_UNITS];
 131    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 132
 133    /* SGI_texture_color_table */
 134    GLboolean TextureColorTable[MAX_TEXTURE_UNITS];
 135
 136    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 137    GLboolean VertexProgram;
 138    GLboolean VertexProgramPointSize;
 139    GLboolean VertexProgramTwoSide;
 140
 141    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 142    GLboolean PointSprite;
 143    GLboolean FragmentShaderATI;
 144 };
 145
 146
 147 /**
 148  * Node for the attribute stack.
 149  */
 150 struct gl_attrib_node
 151 {
 152    GLbitfield kind;
 153    void *data;
 154    struct gl_attrib_node *next;
 155 };
 156
 157
 158
 159 /**
 160  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 161  */
 162 struct texture_state
 163 {
 164    struct gl_texture_attrib Texture;  /**< The usual context state */
 165
 166    /** to save per texture object state (wrap modes, filters, etc): */
 167    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 168
 169    /**
 170     * To save references to texture objects (so they don't get accidentally
 171     * deleted while saved in the attribute stack).
 172     */
 173    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 174 };
 175
 176
 177 /**
 178  * Allocate new attribute node of given type/kind.  Attach payload data.
 179  * Insert it into the linked list named by 'head'.
 180  */
 181 static void
 182 save_attrib_data(struct gl_attrib_node **head,
 183                  GLbitfield kind, void *payload)
 184 {
 185    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 186    if (n) {
 187       n->kind = kind;
 188       n->data = payload;
 189       /* insert at head */
 190       n->next = *head;
 191       *head = n;
 192    }
 193    else {
 194       /* out of memory! */
 195    }
 196 }
 197
 198
 199 void GLAPIENTRY
 200 _mesa_PushAttrib(GLbitfield mask)
 201 {
 202    struct gl_attrib_node *head;
 203
 204    GET_CURRENT_CONTEXT(ctx);
 205    ASSERT_OUTSIDE_BEGIN_END(ctx);
 206
 207    if (MESA_VERBOSE & VERBOSE_API)
 208       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 209
 210    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 211       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 212       return;
 213    }
 214
 215    /* Build linked list of attribute nodes which save all attribute */
 216    /* groups specified by the mask. */
 217    head = NULL;
 218
 219    if (mask & GL_ACCUM_BUFFER_BIT) {
 220       struct gl_accum_attrib *attr;
 221       attr = MALLOC_STRUCT( gl_accum_attrib );
 222       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 223       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 224    }
 225
 226    if (mask & GL_COLOR_BUFFER_BIT) {
 227       GLuint i;
 228       struct gl_colorbuffer_attrib *attr;
 229       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 230       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 231       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 232       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 233          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 234       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 235    }
 236
 237    if (mask & GL_CURRENT_BIT) {
 238       struct gl_current_attrib *attr;
 239       FLUSH_CURRENT( ctx, 0 );
 240       attr = MALLOC_STRUCT( gl_current_attrib );
 241       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 242       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 243    }
 244
 245    if (mask & GL_DEPTH_BUFFER_BIT) {
 246       struct gl_depthbuffer_attrib *attr;
 247       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 248       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 249       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 250    }
 251
 252    if (mask & GL_ENABLE_BIT) {
 253       struct gl_enable_attrib *attr;
 254       GLuint i;
 255       attr = MALLOC_STRUCT( gl_enable_attrib );
 256       /* Copy enable flags from all other attributes into the enable struct. */
 257       attr->AlphaTest = ctx->Color.AlphaEnabled;
 258       attr->AutoNormal = ctx->Eval.AutoNormal;
 259       attr->Blend = ctx->Color.BlendEnabled;
 260       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 261       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 262       for (i = 0; i < COLORTABLE_MAX; i++) {
 263          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 264       }
 265       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 266       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 267       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 268       attr->CullFace = ctx->Polygon.CullFlag;
 269       attr->DepthClamp = ctx->Transform.DepthClamp;
 270       attr->DepthTest = ctx->Depth.Test;
 271       attr->Dither = ctx->Color.DitherFlag;
 272       attr->Fog = ctx->Fog.Enabled;
 273       for (i = 0; i < ctx->Const.MaxLights; i++) {
 274          attr->Light[i] = ctx->Light.Light[i].Enabled;
 275       }
 276       attr->Lighting = ctx->Light.Enabled;
 277       attr->LineSmooth = ctx->Line.SmoothFlag;
 278       attr->LineStipple = ctx->Line.StippleFlag;
 279       attr->Histogram = ctx->Pixel.HistogramEnabled;
 280       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 281       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 282       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 283       attr->Map1Color4 = ctx->Eval.Map1Color4;
 284       attr->Map1Index = ctx->Eval.Map1Index;
 285       attr->Map1Normal = ctx->Eval.Map1Normal;
 286       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 287       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 288       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 289       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 290       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 291       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 292       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 293       attr->Map2Color4 = ctx->Eval.Map2Color4;
 294       attr->Map2Index = ctx->Eval.Map2Index;
 295       attr->Map2Normal = ctx->Eval.Map2Normal;
 296       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 297       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 298       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 299       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 300       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 301       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 302       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 303       attr->Normalize = ctx->Transform.Normalize;
 304       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 305       attr->PointSmooth = ctx->Point.SmoothFlag;
 306       attr->PointSprite = ctx->Point.PointSprite;
 307       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 308       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 309       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 310       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 311       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 312       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 313       attr->Scissor = ctx->Scissor.Enabled;
 314       attr->Stencil = ctx->Stencil.Enabled;
 315       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 316       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 317       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 318       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 319       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 320       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 321       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 322          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 323          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 324          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 325       }
 326       /* GL_NV_vertex_program */
 327       attr->VertexProgram = ctx->VertexProgram.Enabled;
 328       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 329       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 330       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 331    }
 332
 333    if (mask & GL_EVAL_BIT) {
 334       struct gl_eval_attrib *attr;
 335       attr = MALLOC_STRUCT( gl_eval_attrib );
 336       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 337       save_attrib_data(&head, GL_EVAL_BIT, attr);
 338    }
 339
 340    if (mask & GL_FOG_BIT) {
 341       struct gl_fog_attrib *attr;
 342       attr = MALLOC_STRUCT( gl_fog_attrib );
 343       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 344       save_attrib_data(&head, GL_FOG_BIT, attr);
 345    }
 346
 347    if (mask & GL_HINT_BIT) {
 348       struct gl_hint_attrib *attr;
 349       attr = MALLOC_STRUCT( gl_hint_attrib );
 350       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 351       save_attrib_data(&head, GL_HINT_BIT, attr);
 352    }
 353
 354    if (mask & GL_LIGHTING_BIT) {
 355       struct gl_light_attrib *attr;
 356       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 357       attr = MALLOC_STRUCT( gl_light_attrib );
 358       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 359       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 360    }
 361
 362    if (mask & GL_LINE_BIT) {
 363       struct gl_line_attrib *attr;
 364       attr = MALLOC_STRUCT( gl_line_attrib );
 365       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 366       save_attrib_data(&head, GL_LINE_BIT, attr);
 367    }
 368
 369    if (mask & GL_LIST_BIT) {
 370       struct gl_list_attrib *attr;
 371       attr = MALLOC_STRUCT( gl_list_attrib );
 372       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 373       save_attrib_data(&head, GL_LIST_BIT, attr);
 374    }
 375
 376    if (mask & GL_PIXEL_MODE_BIT) {
 377       struct gl_pixel_attrib *attr;
 378       attr = MALLOC_STRUCT( gl_pixel_attrib );
 379       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 380       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 381       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 382       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 383    }
 384
 385    if (mask & GL_POINT_BIT) {
 386       struct gl_point_attrib *attr;
 387       attr = MALLOC_STRUCT( gl_point_attrib );
 388       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 389       save_attrib_data(&head, GL_POINT_BIT, attr);
 390    }
 391
 392    if (mask & GL_POLYGON_BIT) {
 393       struct gl_polygon_attrib *attr;
 394       attr = MALLOC_STRUCT( gl_polygon_attrib );
 395       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 396       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 397    }
 398
 399    if (mask & GL_POLYGON_STIPPLE_BIT) {
 400       GLuint *stipple;
 401       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 402       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 403       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 404    }
 405
 406    if (mask & GL_SCISSOR_BIT) {
 407       struct gl_scissor_attrib *attr;
 408       attr = MALLOC_STRUCT( gl_scissor_attrib );
 409       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 410       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 411    }
 412
 413    if (mask & GL_STENCIL_BUFFER_BIT) {
 414       struct gl_stencil_attrib *attr;
 415       attr = MALLOC_STRUCT( gl_stencil_attrib );
 416       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 417       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 418    }
 419
 420    if (mask & GL_TEXTURE_BIT) {
 421       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 422       GLuint u, tex;
 423
 424       if (!texstate) {
 425          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 426          goto end;
 427       }
 428
 429       _mesa_lock_context_textures(ctx);
 430
 431       /* copy/save the bulk of texture state here */
 432       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 433
 434       /* Save references to the currently bound texture objects so they don't
 435        * accidentally get deleted while referenced in the attribute stack.
 436        */
 437       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 438          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 439             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 440                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 441          }
 442       }
 443
 444       /* copy state/contents of the currently bound texture objects */
 445       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 446          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 447             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 448                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 449          }
 450       }
 451
 452       _mesa_unlock_context_textures(ctx);
 453
 454       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 455    }
 456
 457    if (mask & GL_TRANSFORM_BIT) {
 458       struct gl_transform_attrib *attr;
 459       attr = MALLOC_STRUCT( gl_transform_attrib );
 460       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 461       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 462    }
 463
 464    if (mask & GL_VIEWPORT_BIT) {
 465       struct gl_viewport_attrib *attr;
 466       attr = MALLOC_STRUCT( gl_viewport_attrib );
 467       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 468       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 469    }
 470
 471    /* GL_ARB_multisample */
 472    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 473       struct gl_multisample_attrib *attr;
 474       attr = MALLOC_STRUCT( gl_multisample_attrib );
 475       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 476       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 477    }
 478
 479 end:
 480    ctx->AttribStack[ctx->AttribStackDepth] = head;
 481    ctx->AttribStackDepth++;
 482 }
 483
 484
 485
 486 static void
 487 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 488 {
 489    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 490    GLuint i;
 491
 492 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 493         if ((VALUE) != (NEWVALUE)) {                    \
 494            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 495         }
 496
 497    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 498    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 499
 500    for (i=0;i<MAX_CLIP_PLANES;i++) {
 501       const GLuint mask = 1 << i;
 502       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 503           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 504                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 505    }
 506
 507    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 508                    GL_COLOR_MATERIAL);
 509    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 510                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 511                    GL_COLOR_TABLE);
 512    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 513                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 514                    GL_POST_CONVOLUTION_COLOR_TABLE);
 515    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 516                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 517                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 518    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 519    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
 520                    GL_DEPTH_CLAMP);
 521    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 522    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 523    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 524                    GL_CONVOLUTION_1D);
 525    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 526                    GL_CONVOLUTION_2D);
 527    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 528                    GL_SEPARABLE_2D);
 529    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 530    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 531    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 532    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 533                    GL_LINE_STIPPLE);
 534    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 535                    GL_INDEX_LOGIC_OP);
 536    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 537                    GL_COLOR_LOGIC_OP);
 538
 539    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 540    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 541    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 542    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 543                    GL_MAP1_TEXTURE_COORD_1);
 544    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 545                    GL_MAP1_TEXTURE_COORD_2);
 546    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 547                    GL_MAP1_TEXTURE_COORD_3);
 548    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 549                    GL_MAP1_TEXTURE_COORD_4);
 550    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 551                    GL_MAP1_VERTEX_3);
 552    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 553                    GL_MAP1_VERTEX_4);
 554    for (i = 0; i < 16; i++) {
 555       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 556                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 557    }
 558
 559    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 560    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 561    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 562    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 563                    GL_MAP2_TEXTURE_COORD_1);
 564    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 565                    GL_MAP2_TEXTURE_COORD_2);
 566    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 567                    GL_MAP2_TEXTURE_COORD_3);
 568    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 569                    GL_MAP2_TEXTURE_COORD_4);
 570    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 571                    GL_MAP2_VERTEX_3);
 572    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 573                    GL_MAP2_VERTEX_4);
 574    for (i = 0; i < 16; i++) {
 575       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 576                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 577    }
 578
 579    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 580    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 581    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 582                    GL_RESCALE_NORMAL_EXT);
 583    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 584                    enable->RasterPositionUnclipped,
 585                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 586    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 587                    GL_POINT_SMOOTH);
 588    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 589       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 590                       GL_POINT_SPRITE_NV);
 591    }
 592    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 593                    GL_POLYGON_OFFSET_POINT);
 594    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 595                    GL_POLYGON_OFFSET_LINE);
 596    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 597                    GL_POLYGON_OFFSET_FILL);
 598    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 599                    GL_POLYGON_SMOOTH);
 600    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 601                    GL_POLYGON_STIPPLE);
 602    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 603    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 604    if (ctx->Extensions.EXT_stencil_two_side) {
 605       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 606    }
 607    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 608                    GL_MULTISAMPLE_ARB);
 609    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 610                    enable->SampleAlphaToCoverage,
 611                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 612    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 613                    enable->SampleAlphaToOne,
 614                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 615    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 616                    enable->SampleCoverage,
 617                    GL_SAMPLE_COVERAGE_ARB);
 618    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 619                    enable->SampleCoverageInvert,
 620                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 621    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 622    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 623                    enable->VertexProgram,
 624                    GL_VERTEX_PROGRAM_ARB);
 625    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 626                    enable->VertexProgramPointSize,
 627                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 628    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 629                    enable->VertexProgramTwoSide,
 630                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 631
 632 #undef TEST_AND_UPDATE
 633
 634    /* texture unit enables */
 635    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 636       const GLbitfield enabled = enable->Texture[i];
 637       const GLbitfield genEnabled = enable->TexGen[i];
 638
 639       if (ctx->Texture.Unit[i].Enabled != enabled) {
 640          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 641
 642          _mesa_set_enable(ctx, GL_TEXTURE_1D,
 643                           (enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 644          _mesa_set_enable(ctx, GL_TEXTURE_2D,
 645                           (enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 646          _mesa_set_enable(ctx, GL_TEXTURE_3D,
 647                           (enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 648          if (ctx->Extensions.NV_texture_rectangle) {
 649             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 650                              (enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 651          }
 652          if (ctx->Extensions.ARB_texture_cube_map) {
 653             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 654                              (enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 655          }
 656          if (ctx->Extensions.MESA_texture_array) {
 657             _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 658                            (enabled & TEXTURE_1D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 659             _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 660                            (enabled & TEXTURE_2D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 661          }
 662       }
 663
 664       if (ctx->Texture.Unit[i].TexGenEnabled != genEnabled) {
 665          _mesa_ActiveTextureARB(GL_TEXTURE0 + i);
 666          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 667                           (genEnabled & S_BIT) ? GL_TRUE : GL_FALSE);
 668          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 669                           (genEnabled & T_BIT) ? GL_TRUE : GL_FALSE);
 670          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 671                           (genEnabled & R_BIT) ? GL_TRUE : GL_FALSE);
 672          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 673                           (genEnabled & Q_BIT) ? GL_TRUE : GL_FALSE);
 674       }
 675
 676       /* GL_SGI_texture_color_table */
 677       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 678    }
 679
 680    _mesa_ActiveTextureARB(GL_TEXTURE0 + curTexUnitSave);
 681 }
 682
 683
 684 /**
 685  * Pop/restore texture attribute/group state.
 686  */
 687 static void
 688 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 689 {
 690    GLuint u;
 691
 692    _mesa_lock_context_textures(ctx);
 693
 694    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 695       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 696       GLuint tgt;
 697
 698       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 699       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 700                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 701       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 702                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 703       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 704                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 705       if (ctx->Extensions.ARB_texture_cube_map) {
 706          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 707                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 708       }
 709       if (ctx->Extensions.NV_texture_rectangle) {
 710          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 711                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 712       }
 713       if (ctx->Extensions.MESA_texture_array) {
 714          _mesa_set_enable(ctx, GL_TEXTURE_1D_ARRAY_EXT,
 715                  (unit->Enabled & TEXTURE_1D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 716          _mesa_set_enable(ctx, GL_TEXTURE_2D_ARRAY_EXT,
 717                  (unit->Enabled & TEXTURE_2D_ARRAY_BIT) ? GL_TRUE : GL_FALSE);
 718       }
 719
 720       if (ctx->Extensions.SGI_texture_color_table) {
 721          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 722                           unit->ColorTableEnabled);
 723       }
 724       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 725       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 726       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 727       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 728       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 729       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 730       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 731       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 732       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 733       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 734       /* Eye plane done differently to avoid re-transformation */
 735       {
 736          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 737          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 738          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 739          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 740          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 741          if (ctx->Driver.TexGen) {
 742             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 743             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 744             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 745             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 746          }
 747       }
 748       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 749                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 750       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 751                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 752       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 753                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 754       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 755                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 756       if (ctx->Extensions.EXT_texture_lod_bias) {
 757          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 758                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 759       }
 760       if (ctx->Extensions.EXT_texture_env_combine ||
 761           ctx->Extensions.ARB_texture_env_combine) {
 762          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 763                        unit->Combine.ModeRGB);
 764          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 765                        unit->Combine.ModeA);
 766          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 767                        unit->Combine.SourceRGB[0]);
 768          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 769                        unit->Combine.SourceRGB[1]);
 770          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 771                        unit->Combine.SourceRGB[2]);
 772          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 773                        unit->Combine.SourceA[0]);
 774          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 775                        unit->Combine.SourceA[1]);
 776          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 777                        unit->Combine.SourceA[2]);
 778          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 779                        unit->Combine.OperandRGB[0]);
 780          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 781                        unit->Combine.OperandRGB[1]);
 782          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 783                        unit->Combine.OperandRGB[2]);
 784          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 785                        unit->Combine.OperandA[0]);
 786          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 787                        unit->Combine.OperandA[1]);
 788          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 789                        unit->Combine.OperandA[2]);
 790          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 791                        1 << unit->Combine.ScaleShiftRGB);
 792          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 793                        1 << unit->Combine.ScaleShiftA);
 794       }
 795
 796       /* Restore texture object state for each target */
 797       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 798          const struct gl_texture_object *obj = NULL;
 799          GLenum target;
 800
 801          obj = &texstate->SavedObj[u][tgt];
 802
 803          /* don't restore state for unsupported targets to prevent
 804           * raising GL errors.
 805           */
 806          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 807              !ctx->Extensions.ARB_texture_cube_map) {
 808             continue;
 809          }
 810          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 811                   !ctx->Extensions.NV_texture_rectangle) {
 812             continue;
 813          }
 814          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 815                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 816                   !ctx->Extensions.MESA_texture_array) {
 817             continue;
 818          }
 819
 820          target = obj->Target;
 821
 822          _mesa_BindTexture(target, obj->Name);
 823
 824          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, obj->BorderColor);
 825          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 826          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 827          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 828          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 829          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 830          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 831          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 832          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 833          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 834          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 835          if (target != GL_TEXTURE_RECTANGLE_ARB)
 836             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 837          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 838             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 839                                 obj->MaxAnisotropy);
 840          }
 841          if (ctx->Extensions.ARB_shadow_ambient) {
 842             _mesa_TexParameterf(target, GL_TEXTURE_COMPARE_FAIL_VALUE_ARB,
 843                                 obj->CompareFailValue);
 844          }
 845       }
 846
 847       /* remove saved references to the texture objects */
 848       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 849          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 850       }
 851    }
 852
 853    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 854
 855    _mesa_unlock_context_textures(ctx);
 856 }
 857
 858
 859 /*
 860  * This function is kind of long just because we have to call a lot
 861  * of device driver functions to update device driver state.
 862  *
 863  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 864  * in order to restore GL state.  This isn't terribly efficient but it
 865  * ensures that dirty flags and any derived state gets updated correctly.
 866  * We could at least check if the value to restore equals the current value
 867  * and then skip the Mesa call.
 868  */
 869 void GLAPIENTRY
 870 _mesa_PopAttrib(void)
 871 {
 872    struct gl_attrib_node *attr, *next;
 873    GET_CURRENT_CONTEXT(ctx);
 874    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 875
 876    if (ctx->AttribStackDepth == 0) {
 877       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 878       return;
 879    }
 880
 881    ctx->AttribStackDepth--;
 882    attr = ctx->AttribStack[ctx->AttribStackDepth];
 883
 884    while (attr) {
 885
 886       if (MESA_VERBOSE & VERBOSE_API) {
 887          _mesa_debug(ctx, "glPopAttrib %s\n",
 888                      _mesa_lookup_enum_by_nr(attr->kind));
 889       }
 890
 891       switch (attr->kind) {
 892          case GL_ACCUM_BUFFER_BIT:
 893             {
 894                const struct gl_accum_attrib *accum;
 895                accum = (const struct gl_accum_attrib *) attr->data;
 896                _mesa_ClearAccum(accum->ClearColor[0],
 897                                 accum->ClearColor[1],
 898                                 accum->ClearColor[2],
 899                                 accum->ClearColor[3]);
 900             }
 901             break;
 902          case GL_COLOR_BUFFER_BIT:
 903             {
 904                const struct gl_colorbuffer_attrib *color;
 905                color = (const struct gl_colorbuffer_attrib *) attr->data;
 906                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 907                _mesa_ClearColor(color->ClearColor[0],
 908                                 color->ClearColor[1],
 909                                 color->ClearColor[2],
 910                                 color->ClearColor[3]);
 911                _mesa_IndexMask(color->IndexMask);
 912                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 913                                (GLboolean) (color->ColorMask[1] != 0),
 914                                (GLboolean) (color->ColorMask[2] != 0),
 915                                (GLboolean) (color->ColorMask[3] != 0));
 916                {
 917                   /* Need to determine if more than one color output is
 918                    * specified.  If so, call glDrawBuffersARB, else call
 919                    * glDrawBuffer().  This is a subtle, but essential point
 920                    * since GL_FRONT (for example) is illegal for the former
 921                    * function, but legal for the later.
 922                    */
 923                   GLboolean multipleBuffers = GL_FALSE;
 924                   GLuint i;
 925
 926                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 927                      if (color->DrawBuffer[i] != GL_NONE) {
 928                         multipleBuffers = GL_TRUE;
 929                         break;
 930                      }
 931                   }
 932                   /* Call the API_level functions, not _mesa_drawbuffers()
 933                    * since we need to do error checking on the pop'd
 934                    * GL_DRAW_BUFFER.
 935                    * Ex: if GL_FRONT were pushed, but we're popping with a
 936                    * user FBO bound, GL_FRONT will be illegal and we'll need
 937                    * to record that error.  Per OpenGL ARB decision.
 938                    */
 939                   if (multipleBuffers)
 940                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 941                                           color->DrawBuffer);
 942                   else
 943                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 944                }
 945                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 946                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 947                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
 948                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 949                                           color->BlendDstRGB,
 950                                           color->BlendSrcA,
 951                                           color->BlendDstA);
 952                /* This special case is because glBlendEquationSeparateEXT
 953                 * cannot take GL_LOGIC_OP as a parameter.
 954                 */
 955                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 956                   _mesa_BlendEquation(color->BlendEquationRGB);
 957                }
 958                else {
 959                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 960                                                  color->BlendEquationA);
 961                }
 962                _mesa_BlendColor(color->BlendColor[0],
 963                                 color->BlendColor[1],
 964                                 color->BlendColor[2],
 965                                 color->BlendColor[3]);
 966                _mesa_LogicOp(color->LogicOp);
 967                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 968                                 color->ColorLogicOpEnabled);
 969                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 970                                 color->IndexLogicOpEnabled);
 971                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 972             }
 973             break;
 974          case GL_CURRENT_BIT:
 975             FLUSH_CURRENT( ctx, 0 );
 976             MEMCPY( &ctx->Current, attr->data,
 977                     sizeof(struct gl_current_attrib) );
 978             break;
 979          case GL_DEPTH_BUFFER_BIT:
 980             {
 981                const struct gl_depthbuffer_attrib *depth;
 982                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 983                _mesa_DepthFunc(depth->Func);
 984                _mesa_ClearDepth(depth->Clear);
 985                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 986                _mesa_DepthMask(depth->Mask);
 987             }
 988             break;
 989          case GL_ENABLE_BIT:
 990             {
 991                const struct gl_enable_attrib *enable;
 992                enable = (const struct gl_enable_attrib *) attr->data;
 993                pop_enable_group(ctx, enable);
 994                ctx->NewState |= _NEW_ALL;
 995             }
 996             break;
 997          case GL_EVAL_BIT:
 998             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 999             ctx->NewState |= _NEW_EVAL;
1000             break;
1001          case GL_FOG_BIT:
1002             {
1003                const struct gl_fog_attrib *fog;
1004                fog = (const struct gl_fog_attrib *) attr->data;
1005                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1006                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1007                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1008                _mesa_Fogf(GL_FOG_START, fog->Start);
1009                _mesa_Fogf(GL_FOG_END, fog->End);
1010                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1011                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1012             }
1013             break;
1014          case GL_HINT_BIT:
1015             {
1016                const struct gl_hint_attrib *hint;
1017                hint = (const struct gl_hint_attrib *) attr->data;
1018                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1019                           hint->PerspectiveCorrection );
1020                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1021                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1022                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1023                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1024                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1025                           hint->ClipVolumeClipping);
1026                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1027                           hint->TextureCompression);
1028             }
1029             break;
1030          case GL_LIGHTING_BIT:
1031             {
1032                GLuint i;
1033                const struct gl_light_attrib *light;
1034                light = (const struct gl_light_attrib *) attr->data;
1035                /* lighting enable */
1036                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1037                /* per-light state */
1038                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1039                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1040
1041                for (i = 0; i < ctx->Const.MaxLights; i++) {
1042                   const struct gl_light *l = &light->Light[i];
1043                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1044                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1045                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1046                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1047                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1048                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1049                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1050                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1051                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1052                               &l->ConstantAttenuation);
1053                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1054                               &l->LinearAttenuation);
1055                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1056                               &l->QuadraticAttenuation);
1057                }
1058                /* light model */
1059                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1060                                   light->Model.Ambient);
1061                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1062                                  (GLfloat) light->Model.LocalViewer);
1063                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1064                                  (GLfloat) light->Model.TwoSide);
1065                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1066                                  (GLfloat) light->Model.ColorControl);
1067                /* shade model */
1068                _mesa_ShadeModel(light->ShadeModel);
1069                /* color material */
1070                _mesa_ColorMaterial(light->ColorMaterialFace,
1071                                    light->ColorMaterialMode);
1072                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1073                                 light->ColorMaterialEnabled);
1074                /* materials */
1075                MEMCPY(&ctx->Light.Material, &light->Material,
1076                       sizeof(struct gl_material));
1077             }
1078             break;
1079          case GL_LINE_BIT:
1080             {
1081                const struct gl_line_attrib *line;
1082                line = (const struct gl_line_attrib *) attr->data;
1083                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1084                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1085                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1086                _mesa_LineWidth(line->Width);
1087             }
1088             break;
1089          case GL_LIST_BIT:
1090             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1091             break;
1092          case GL_PIXEL_MODE_BIT:
1093             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1094             /* XXX what other pixel state needs to be set by function calls? */
1095             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1096             ctx->NewState |= _NEW_PIXEL;
1097             break;
1098          case GL_POINT_BIT:
1099             {
1100                const struct gl_point_attrib *point;
1101                point = (const struct gl_point_attrib *) attr->data;
1102                _mesa_PointSize(point->Size);
1103                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1104                if (ctx->Extensions.EXT_point_parameters) {
1105                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1106                                          point->Params);
1107                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1108                                         point->MinSize);
1109                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1110                                         point->MaxSize);
1111                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1112                                         point->Threshold);
1113                }
1114                if (ctx->Extensions.NV_point_sprite
1115                    || ctx->Extensions.ARB_point_sprite) {
1116                   GLuint u;
1117                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1118                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1119                                    (GLint) point->CoordReplace[u]);
1120                   }
1121                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1122                   if (ctx->Extensions.NV_point_sprite)
1123                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1124                                            ctx->Point.SpriteRMode);
1125                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1126                                         (GLfloat)ctx->Point.SpriteOrigin);
1127                }
1128             }
1129             break;
1130          case GL_POLYGON_BIT:
1131             {
1132                const struct gl_polygon_attrib *polygon;
1133                polygon = (const struct gl_polygon_attrib *) attr->data;
1134                _mesa_CullFace(polygon->CullFaceMode);
1135                _mesa_FrontFace(polygon->FrontFace);
1136                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1137                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1138                _mesa_PolygonOffset(polygon->OffsetFactor,
1139                                    polygon->OffsetUnits);
1140                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1141                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1142                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1143                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1144                                 polygon->OffsetPoint);
1145                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1146                                 polygon->OffsetLine);
1147                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1148                                 polygon->OffsetFill);
1149             }
1150             break;
1151          case GL_POLYGON_STIPPLE_BIT:
1152             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1153             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1154             if (ctx->Driver.PolygonStipple)
1155                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1156             break;
1157          case GL_SCISSOR_BIT:
1158             {
1159                const struct gl_scissor_attrib *scissor;
1160                scissor = (const struct gl_scissor_attrib *) attr->data;
1161                _mesa_Scissor(scissor->X, scissor->Y,
1162                              scissor->Width, scissor->Height);
1163                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1164             }
1165             break;
1166          case GL_STENCIL_BUFFER_BIT:
1167             {
1168                const struct gl_stencil_attrib *stencil;
1169                stencil = (const struct gl_stencil_attrib *) attr->data;
1170                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1171                _mesa_ClearStencil(stencil->Clear);
1172                if (ctx->Extensions.EXT_stencil_two_side) {
1173                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1174                                    stencil->TestTwoSide);
1175                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1176                                              ? GL_BACK : GL_FRONT);
1177                }
1178                /* front state */
1179                _mesa_StencilFuncSeparate(GL_FRONT,
1180                                          stencil->Function[0],
1181                                          stencil->Ref[0],
1182                                          stencil->ValueMask[0]);
1183                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1184                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1185                                        stencil->ZFailFunc[0],
1186                                        stencil->ZPassFunc[0]);
1187                /* back state */
1188                _mesa_StencilFuncSeparate(GL_BACK,
1189                                          stencil->Function[1],
1190                                          stencil->Ref[1],
1191                                          stencil->ValueMask[1]);
1192                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1193                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1194                                        stencil->ZFailFunc[1],
1195                                        stencil->ZPassFunc[1]);
1196             }
1197             break;
1198          case GL_TRANSFORM_BIT:
1199             {
1200                GLuint i;
1201                const struct gl_transform_attrib *xform;
1202                xform = (const struct gl_transform_attrib *) attr->data;
1203                _mesa_MatrixMode(xform->MatrixMode);
1204                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1205                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1206
1207                /* restore clip planes */
1208                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1209                   const GLuint mask = 1 << i;
1210                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1211                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1212                   if (xform->ClipPlanesEnabled & mask) {
1213                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1214                   }
1215                   else {
1216                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1217                   }
1218                   if (ctx->Driver.ClipPlane)
1219                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1220                }
1221
1222                /* normalize/rescale */
1223                if (xform->Normalize != ctx->Transform.Normalize)
1224                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1225                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1226                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1227                                    ctx->Transform.RescaleNormals);
1228                if (xform->DepthClamp != ctx->Transform.DepthClamp)
1229                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1230                                    ctx->Transform.DepthClamp);
1231             }
1232             break;
1233          case GL_TEXTURE_BIT:
1234             /* Take care of texture object reference counters */
1235             {
1236                struct texture_state *texstate
1237                   = (struct texture_state *) attr->data;
1238                pop_texture_group(ctx, texstate);
1239                ctx->NewState |= _NEW_TEXTURE;
1240             }
1241             break;
1242          case GL_VIEWPORT_BIT:
1243             {
1244                const struct gl_viewport_attrib *vp;
1245                vp = (const struct gl_viewport_attrib *) attr->data;
1246                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1247                _mesa_DepthRange(vp->Near, vp->Far);
1248             }
1249             break;
1250          case GL_MULTISAMPLE_BIT_ARB:
1251             {
1252                const struct gl_multisample_attrib *ms;
1253                ms = (const struct gl_multisample_attrib *) attr->data;
1254                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1255                                        ms->SampleCoverageInvert);
1256             }
1257             break;
1258
1259          default:
1260             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1261             break;
1262       }
1263
1264       next = attr->next;
1265       FREE( attr->data );
1266       FREE( attr );
1267       attr = next;
1268    }
1269 }
1270
1271
1272 /**
1273  * Helper for incrementing/decrementing vertex buffer object reference
1274  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1275  */
1276 static void
1277 adjust_buffer_object_ref_counts(struct gl_array_object *arrayObj, GLint step)
1278 {
1279    GLuint i;
1280
1281    arrayObj->Vertex.BufferObj->RefCount += step;
1282    arrayObj->Weight.BufferObj->RefCount += step;
1283    arrayObj->Normal.BufferObj->RefCount += step;
1284    arrayObj->Color.BufferObj->RefCount += step;
1285    arrayObj->SecondaryColor.BufferObj->RefCount += step;
1286    arrayObj->FogCoord.BufferObj->RefCount += step;
1287    arrayObj->Index.BufferObj->RefCount += step;
1288    arrayObj->EdgeFlag.BufferObj->RefCount += step;
1289    for (i = 0; i < Elements(arrayObj->TexCoord); i++)
1290       arrayObj->TexCoord[i].BufferObj->RefCount += step;
1291    for (i = 0; i < Elements(arrayObj->VertexAttrib); i++)
1292       arrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1293 }
1294
1295
1296 /**
1297  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1298  * object refcounts.
1299  */
1300 static void
1301 copy_pixelstore(GLcontext *ctx,
1302                 struct gl_pixelstore_attrib *dst,
1303                 const struct gl_pixelstore_attrib *src)
1304 {
1305    dst->Alignment = src->Alignment;
1306    dst->RowLength = src->RowLength;
1307    dst->SkipPixels = src->SkipPixels;
1308    dst->SkipRows = src->SkipRows;
1309    dst->ImageHeight = src->ImageHeight;
1310    dst->SkipImages = src->SkipImages;
1311    dst->SwapBytes = src->SwapBytes;
1312    dst->LsbFirst = src->LsbFirst;
1313    dst->ClientStorage = src->ClientStorage;
1314    dst->Invert = src->Invert;
1315    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1316 }
1317
1318
1319 #define GL_CLIENT_PACK_BIT (1<<20)
1320 #define GL_CLIENT_UNPACK_BIT (1<<21)
1321
1322
1323 void GLAPIENTRY
1324 _mesa_PushClientAttrib(GLbitfield mask)
1325 {
1326    struct gl_attrib_node *head;
1327
1328    GET_CURRENT_CONTEXT(ctx);
1329    ASSERT_OUTSIDE_BEGIN_END(ctx);
1330
1331    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1332       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1333       return;
1334    }
1335
1336    /* Build linked list of attribute nodes which save all attribute
1337     * groups specified by the mask.
1338     */
1339    head = NULL;
1340
1341    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1342       struct gl_pixelstore_attrib *attr;
1343       /* packing attribs */
1344       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1345       copy_pixelstore(ctx, attr, &ctx->Pack);
1346       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1347       /* unpacking attribs */
1348       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1349       copy_pixelstore(ctx, attr, &ctx->Unpack);
1350       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1351    }
1352
1353    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1354       struct gl_array_attrib *attr;
1355       struct gl_array_object *obj;
1356
1357       attr = MALLOC_STRUCT( gl_array_attrib );
1358       obj = MALLOC_STRUCT( gl_array_object );
1359
1360 #if FEATURE_ARB_vertex_buffer_object
1361       /* increment ref counts since we're copying pointers to these objects */
1362       ctx->Array.ArrayBufferObj->RefCount++;
1363       ctx->Array.ElementArrayBufferObj->RefCount++;
1364 #endif
1365
1366       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1367       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1368
1369       attr->ArrayObj = obj;
1370
1371       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1372
1373       /* bump reference counts on buffer objects */
1374       adjust_buffer_object_ref_counts(ctx->Array.ArrayObj, 1);
1375    }
1376
1377    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1378    ctx->ClientAttribStackDepth++;
1379 }
1380
1381
1382
1383
1384 void GLAPIENTRY
1385 _mesa_PopClientAttrib(void)
1386 {
1387    struct gl_attrib_node *node, *next;
1388
1389    GET_CURRENT_CONTEXT(ctx);
1390    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1391
1392    if (ctx->ClientAttribStackDepth == 0) {
1393       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1394       return;
1395    }
1396
1397    ctx->ClientAttribStackDepth--;
1398    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1399
1400    while (node) {
1401       switch (node->kind) {
1402          case GL_CLIENT_PACK_BIT:
1403             {
1404                struct gl_pixelstore_attrib *store =
1405                   (struct gl_pixelstore_attrib *) node->data;
1406                copy_pixelstore(ctx, &ctx->Pack, store);
1407                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1408             }
1409             ctx->NewState |= _NEW_PACKUNPACK;
1410             break;
1411          case GL_CLIENT_UNPACK_BIT:
1412             {
1413                struct gl_pixelstore_attrib *store =
1414                   (struct gl_pixelstore_attrib *) node->data;
1415                copy_pixelstore(ctx, &ctx->Unpack, store);
1416                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1417             }
1418             ctx->NewState |= _NEW_PACKUNPACK;
1419             break;
1420          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1421             struct gl_array_attrib * data =
1422               (struct gl_array_attrib *) node->data;
1423
1424             adjust_buffer_object_ref_counts(ctx->Array.ArrayObj, -1);
1425
1426             ctx->Array.ActiveTexture = data->ActiveTexture;
1427             if (data->LockCount != 0)
1428                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1429             else if (ctx->Array.LockCount)
1430                _mesa_UnlockArraysEXT();
1431
1432             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1433
1434 #if FEATURE_ARB_vertex_buffer_object
1435             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1436                                 data->ArrayBufferObj->Name);
1437             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1438                                 data->ElementArrayBufferObj->Name);
1439 #endif
1440
1441             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1442                     sizeof( struct gl_array_object ) );
1443
1444             FREE( data->ArrayObj );
1445
1446             /* FIXME: Should some bits in ctx->Array->NewState also be set
1447              * FIXME: here?  It seems like it should be set to inclusive-or
1448              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1449              */
1450
1451             ctx->NewState |= _NEW_ARRAY;
1452             break;
1453          }
1454          default:
1455             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1456             break;
1457       }
1458
1459       next = node->next;
1460       FREE( node->data );
1461       FREE( node );
1462       node = next;
1463    }
1464 }
1465
1466
1467 /**
1468  * Free any attribute state data that might be attached to the context.
1469  */
1470 void
1471 _mesa_free_attrib_data(GLcontext *ctx)
1472 {
1473    while (ctx->AttribStackDepth > 0) {
1474       struct gl_attrib_node *attr, *next;
1475
1476       ctx->AttribStackDepth--;
1477       attr = ctx->AttribStack[ctx->AttribStackDepth];
1478
1479       while (attr) {
1480          if (attr->kind == GL_TEXTURE_BIT) {
1481             struct texture_state *texstate = (struct texture_state*)attr->data;
1482             GLuint u, tgt;
1483             /* clear references to the saved texture objects */
1484             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1485                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1486                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1487                }
1488             }
1489          }
1490          else {
1491             /* any other chunks of state that requires special handling? */
1492          }
1493
1494          next = attr->next;
1495          _mesa_free(attr->data);
1496          _mesa_free(attr);
1497          attr = next;
1498       }
1499    }
1500 }
1501
1502
1503 void _mesa_init_attrib( GLcontext *ctx )
1504 {
1505    /* Renderer and client attribute stacks */
1506    ctx->AttribStackDepth = 0;
1507    ctx->ClientAttribStackDepth = 0;
1508 }