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