src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2007  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 "colormac.h"
  34 #include "colortab.h"
  35 #include "context.h"
  36 #include "depth.h"
  37 #include "enable.h"
  38 #include "enums.h"
  39 #include "fog.h"
  40 #include "hint.h"
  41 #include "light.h"
  42 #include "lines.h"
  43 #include "matrix.h"
  44 #include "points.h"
  45 #include "polygon.h"
  46 #include "simple_list.h"
  47 #include "stencil.h"
  48 #include "texobj.h"
  49 #include "texstate.h"
  50 #include "mtypes.h"
  51 #include "math/m_xform.h"
  52
  53
  54 /**
  55  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
  56  */
  57 struct texture_state
  58 {
  59    struct gl_texture_attrib Texture;  /**< The usual context state */
  60
  61    /** to save per texture object state (wrap modes, filters, etc): */
  62    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  63
  64    /**
  65     * To save references to texture objects (so they don't get accidentally
  66     * deleted while saved in the attribute stack).
  67     */
  68    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  69 };
  70
  71
  72 /**
  73  * Allocate a new attribute state node.  These nodes have a
  74  * "kind" value and a pointer to a struct of state data.
  75  */
  76 static struct gl_attrib_node *
  77 new_attrib_node( GLbitfield kind )
  78 {
  79    struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
  80    if (an) {
  81       an->kind = kind;
  82    }
  83    return an;
  84 }
  85
  86
  87 void GLAPIENTRY
  88 _mesa_PushAttrib(GLbitfield mask)
  89 {
  90    struct gl_attrib_node *newnode;
  91    struct gl_attrib_node *head;
  92
  93    GET_CURRENT_CONTEXT(ctx);
  94    ASSERT_OUTSIDE_BEGIN_END(ctx);
  95
  96    if (MESA_VERBOSE & VERBOSE_API)
  97       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
  98
  99    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 100       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 101       return;
 102    }
 103
 104    /* Build linked list of attribute nodes which save all attribute */
 105    /* groups specified by the mask. */
 106    head = NULL;
 107
 108    if (mask & GL_ACCUM_BUFFER_BIT) {
 109       struct gl_accum_attrib *attr;
 110       attr = MALLOC_STRUCT( gl_accum_attrib );
 111       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 112       newnode = new_attrib_node( GL_ACCUM_BUFFER_BIT );
 113       newnode->data = attr;
 114       newnode->next = head;
 115       head = newnode;
 116    }
 117
 118    if (mask & GL_COLOR_BUFFER_BIT) {
 119       GLuint i;
 120       struct gl_colorbuffer_attrib *attr;
 121       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 122       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 123       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 124       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 125          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 126       newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
 127       newnode->data = attr;
 128       newnode->next = head;
 129       head = newnode;
 130    }
 131
 132    if (mask & GL_CURRENT_BIT) {
 133       struct gl_current_attrib *attr;
 134       FLUSH_CURRENT( ctx, 0 );
 135       attr = MALLOC_STRUCT( gl_current_attrib );
 136       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 137       newnode = new_attrib_node( GL_CURRENT_BIT );
 138       newnode->data = attr;
 139       newnode->next = head;
 140       head = newnode;
 141    }
 142
 143    if (mask & GL_DEPTH_BUFFER_BIT) {
 144       struct gl_depthbuffer_attrib *attr;
 145       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 146       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 147       newnode = new_attrib_node( GL_DEPTH_BUFFER_BIT );
 148       newnode->data = attr;
 149       newnode->next = head;
 150       head = newnode;
 151    }
 152
 153    if (mask & GL_ENABLE_BIT) {
 154       struct gl_enable_attrib *attr;
 155       GLuint i;
 156       attr = MALLOC_STRUCT( gl_enable_attrib );
 157       /* Copy enable flags from all other attributes into the enable struct. */
 158       attr->AlphaTest = ctx->Color.AlphaEnabled;
 159       attr->AutoNormal = ctx->Eval.AutoNormal;
 160       attr->Blend = ctx->Color.BlendEnabled;
 161       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 162       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 163       for (i = 0; i < COLORTABLE_MAX; i++) {
 164          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 165       }
 166       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 167       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 168       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 169       attr->CullFace = ctx->Polygon.CullFlag;
 170       attr->DepthTest = ctx->Depth.Test;
 171       attr->Dither = ctx->Color.DitherFlag;
 172       attr->Fog = ctx->Fog.Enabled;
 173       for (i = 0; i < ctx->Const.MaxLights; i++) {
 174          attr->Light[i] = ctx->Light.Light[i].Enabled;
 175       }
 176       attr->Lighting = ctx->Light.Enabled;
 177       attr->LineSmooth = ctx->Line.SmoothFlag;
 178       attr->LineStipple = ctx->Line.StippleFlag;
 179       attr->Histogram = ctx->Pixel.HistogramEnabled;
 180       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 181       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 182       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 183       attr->Map1Color4 = ctx->Eval.Map1Color4;
 184       attr->Map1Index = ctx->Eval.Map1Index;
 185       attr->Map1Normal = ctx->Eval.Map1Normal;
 186       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 187       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 188       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 189       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 190       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 191       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 192       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 193       attr->Map2Color4 = ctx->Eval.Map2Color4;
 194       attr->Map2Index = ctx->Eval.Map2Index;
 195       attr->Map2Normal = ctx->Eval.Map2Normal;
 196       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 197       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 198       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 199       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 200       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 201       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 202       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 203       attr->Normalize = ctx->Transform.Normalize;
 204       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 205       attr->PointSmooth = ctx->Point.SmoothFlag;
 206       attr->PointSprite = ctx->Point.PointSprite;
 207       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 208       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 209       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 210       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 211       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 212       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 213       attr->Scissor = ctx->Scissor.Enabled;
 214       attr->Stencil = ctx->Stencil.Enabled;
 215       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 216       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 217       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 218       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 219       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 220       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 221       for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 222          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 223          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 224          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 225       }
 226       /* GL_NV_vertex_program */
 227       attr->VertexProgram = ctx->VertexProgram.Enabled;
 228       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 229       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 230       newnode = new_attrib_node( GL_ENABLE_BIT );
 231       newnode->data = attr;
 232       newnode->next = head;
 233       head = newnode;
 234    }
 235
 236    if (mask & GL_EVAL_BIT) {
 237       struct gl_eval_attrib *attr;
 238       attr = MALLOC_STRUCT( gl_eval_attrib );
 239       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 240       newnode = new_attrib_node( GL_EVAL_BIT );
 241       newnode->data = attr;
 242       newnode->next = head;
 243       head = newnode;
 244    }
 245
 246    if (mask & GL_FOG_BIT) {
 247       struct gl_fog_attrib *attr;
 248       attr = MALLOC_STRUCT( gl_fog_attrib );
 249       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 250       newnode = new_attrib_node( GL_FOG_BIT );
 251       newnode->data = attr;
 252       newnode->next = head;
 253       head = newnode;
 254    }
 255
 256    if (mask & GL_HINT_BIT) {
 257       struct gl_hint_attrib *attr;
 258       attr = MALLOC_STRUCT( gl_hint_attrib );
 259       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 260       newnode = new_attrib_node( GL_HINT_BIT );
 261       newnode->data = attr;
 262       newnode->next = head;
 263       head = newnode;
 264    }
 265
 266    if (mask & GL_LIGHTING_BIT) {
 267       struct gl_light_attrib *attr;
 268       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 269       attr = MALLOC_STRUCT( gl_light_attrib );
 270       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 271       newnode = new_attrib_node( GL_LIGHTING_BIT );
 272       newnode->data = attr;
 273       newnode->next = head;
 274       head = newnode;
 275    }
 276
 277    if (mask & GL_LINE_BIT) {
 278       struct gl_line_attrib *attr;
 279       attr = MALLOC_STRUCT( gl_line_attrib );
 280       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 281       newnode = new_attrib_node( GL_LINE_BIT );
 282       newnode->data = attr;
 283       newnode->next = head;
 284       head = newnode;
 285    }
 286
 287    if (mask & GL_LIST_BIT) {
 288       struct gl_list_attrib *attr;
 289       attr = MALLOC_STRUCT( gl_list_attrib );
 290       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 291       newnode = new_attrib_node( GL_LIST_BIT );
 292       newnode->data = attr;
 293       newnode->next = head;
 294       head = newnode;
 295    }
 296
 297    if (mask & GL_PIXEL_MODE_BIT) {
 298       struct gl_pixel_attrib *attr;
 299       attr = MALLOC_STRUCT( gl_pixel_attrib );
 300       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 301       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 302       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 303       newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
 304       newnode->data = attr;
 305       newnode->next = head;
 306       head = newnode;
 307    }
 308
 309    if (mask & GL_POINT_BIT) {
 310       struct gl_point_attrib *attr;
 311       attr = MALLOC_STRUCT( gl_point_attrib );
 312       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 313       newnode = new_attrib_node( GL_POINT_BIT );
 314       newnode->data = attr;
 315       newnode->next = head;
 316       head = newnode;
 317    }
 318
 319    if (mask & GL_POLYGON_BIT) {
 320       struct gl_polygon_attrib *attr;
 321       attr = MALLOC_STRUCT( gl_polygon_attrib );
 322       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 323       newnode = new_attrib_node( GL_POLYGON_BIT );
 324       newnode->data = attr;
 325       newnode->next = head;
 326       head = newnode;
 327    }
 328
 329    if (mask & GL_POLYGON_STIPPLE_BIT) {
 330       GLuint *stipple;
 331       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 332       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 333       newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
 334       newnode->data = stipple;
 335       newnode->next = head;
 336       head = newnode;
 337    }
 338
 339    if (mask & GL_SCISSOR_BIT) {
 340       struct gl_scissor_attrib *attr;
 341       attr = MALLOC_STRUCT( gl_scissor_attrib );
 342       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 343       newnode = new_attrib_node( GL_SCISSOR_BIT );
 344       newnode->data = attr;
 345       newnode->next = head;
 346       head = newnode;
 347    }
 348
 349    if (mask & GL_STENCIL_BUFFER_BIT) {
 350       struct gl_stencil_attrib *attr;
 351       attr = MALLOC_STRUCT( gl_stencil_attrib );
 352       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 353       newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
 354       newnode->data = attr;
 355       newnode->next = head;
 356       head = newnode;
 357    }
 358
 359    if (mask & GL_TEXTURE_BIT) {
 360       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 361       GLuint u;
 362
 363       if (!texstate) {
 364          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 365          goto end;
 366       }
 367
 368       _mesa_lock_context_textures(ctx);
 369
 370       /* copy/save the bulk of texture state here */
 371       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 372
 373       /* Save references to the currently bound texture objects so they don't
 374        * accidentally get deleted while referenced in the attribute stack.
 375        */
 376       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 377          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_INDEX],
 378                                 ctx->Texture.Unit[u].Current1D);
 379          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_INDEX],
 380                                 ctx->Texture.Unit[u].Current2D);
 381          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_3D_INDEX],
 382                                 ctx->Texture.Unit[u].Current3D);
 383          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_CUBE_INDEX],
 384                                 ctx->Texture.Unit[u].CurrentCubeMap);
 385          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_RECT_INDEX],
 386                                 ctx->Texture.Unit[u].CurrentRect);
 387          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_ARRAY_INDEX],
 388                                 ctx->Texture.Unit[u].Current1DArray);
 389          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_ARRAY_INDEX],
 390                                 ctx->Texture.Unit[u].Current2DArray);
 391       }
 392
 393       /* copy state/contents of the currently bound texture objects */
 394       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 395          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_INDEX],
 396                                    ctx->Texture.Unit[u].Current1D);
 397          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_INDEX],
 398                                    ctx->Texture.Unit[u].Current2D);
 399          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_3D_INDEX],
 400                                    ctx->Texture.Unit[u].Current3D);
 401          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_CUBE_INDEX],
 402                                    ctx->Texture.Unit[u].CurrentCubeMap);
 403          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_RECT_INDEX],
 404                                    ctx->Texture.Unit[u].CurrentRect);
 405          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_ARRAY_INDEX],
 406                                    ctx->Texture.Unit[u].Current1DArray);
 407          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_ARRAY_INDEX],
 408                                    ctx->Texture.Unit[u].Current2DArray);
 409       }
 410
 411       _mesa_unlock_context_textures(ctx);
 412
 413       newnode = new_attrib_node( GL_TEXTURE_BIT );
 414       newnode->data = texstate;
 415       newnode->next = head;
 416       head = newnode;
 417    }
 418
 419    if (mask & GL_TRANSFORM_BIT) {
 420       struct gl_transform_attrib *attr;
 421       attr = MALLOC_STRUCT( gl_transform_attrib );
 422       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 423       newnode = new_attrib_node( GL_TRANSFORM_BIT );
 424       newnode->data = attr;
 425       newnode->next = head;
 426       head = newnode;
 427    }
 428
 429    if (mask & GL_VIEWPORT_BIT) {
 430       struct gl_viewport_attrib *attr;
 431       attr = MALLOC_STRUCT( gl_viewport_attrib );
 432       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 433       newnode = new_attrib_node( GL_VIEWPORT_BIT );
 434       newnode->data = attr;
 435       newnode->next = head;
 436       head = newnode;
 437    }
 438
 439    /* GL_ARB_multisample */
 440    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 441       struct gl_multisample_attrib *attr;
 442       attr = MALLOC_STRUCT( gl_multisample_attrib );
 443       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 444       newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
 445       newnode->data = attr;
 446       newnode->next = head;
 447       head = newnode;
 448    }
 449
 450 end:
 451    ctx->AttribStack[ctx->AttribStackDepth] = head;
 452    ctx->AttribStackDepth++;
 453 }
 454
 455
 456
 457 static void
 458 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 459 {
 460    GLuint i;
 461
 462 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 463         if ((VALUE) != (NEWVALUE)) {                    \
 464            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 465         }
 466
 467    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 468    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 469
 470    for (i=0;i<MAX_CLIP_PLANES;i++) {
 471       const GLuint mask = 1 << i;
 472       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 473           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 474                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 475    }
 476
 477    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 478                    GL_COLOR_MATERIAL);
 479    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 480                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 481                    GL_COLOR_TABLE);
 482    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 483                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 484                    GL_POST_CONVOLUTION_COLOR_TABLE);
 485    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 486                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 487                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 488    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 489    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 490    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 491    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 492                    GL_CONVOLUTION_1D);
 493    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 494                    GL_CONVOLUTION_2D);
 495    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 496                    GL_SEPARABLE_2D);
 497    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 498    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 499    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 500    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 501                    GL_LINE_STIPPLE);
 502    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 503                    GL_INDEX_LOGIC_OP);
 504    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 505                    GL_COLOR_LOGIC_OP);
 506
 507    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 508    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 509    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 510    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 511                    GL_MAP1_TEXTURE_COORD_1);
 512    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 513                    GL_MAP1_TEXTURE_COORD_2);
 514    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 515                    GL_MAP1_TEXTURE_COORD_3);
 516    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 517                    GL_MAP1_TEXTURE_COORD_4);
 518    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 519                    GL_MAP1_VERTEX_3);
 520    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 521                    GL_MAP1_VERTEX_4);
 522    for (i = 0; i < 16; i++) {
 523       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 524                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 525    }
 526
 527    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 528    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 529    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 530    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 531                    GL_MAP2_TEXTURE_COORD_1);
 532    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 533                    GL_MAP2_TEXTURE_COORD_2);
 534    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 535                    GL_MAP2_TEXTURE_COORD_3);
 536    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 537                    GL_MAP2_TEXTURE_COORD_4);
 538    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 539                    GL_MAP2_VERTEX_3);
 540    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 541                    GL_MAP2_VERTEX_4);
 542    for (i = 0; i < 16; i++) {
 543       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 544                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 545    }
 546
 547    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 548    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 549    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 550                    GL_RESCALE_NORMAL_EXT);
 551    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 552                    enable->RasterPositionUnclipped,
 553                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 554    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 555                    GL_POINT_SMOOTH);
 556    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 557       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 558                       GL_POINT_SPRITE_NV);
 559    }
 560    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 561                    GL_POLYGON_OFFSET_POINT);
 562    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 563                    GL_POLYGON_OFFSET_LINE);
 564    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 565                    GL_POLYGON_OFFSET_FILL);
 566    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 567                    GL_POLYGON_SMOOTH);
 568    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 569                    GL_POLYGON_STIPPLE);
 570    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 571    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 572    if (ctx->Extensions.EXT_stencil_two_side) {
 573       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 574    }
 575    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 576                    GL_MULTISAMPLE_ARB);
 577    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 578                    enable->SampleAlphaToCoverage,
 579                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 580    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 581                    enable->SampleAlphaToOne,
 582                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 583    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 584                    enable->SampleCoverage,
 585                    GL_SAMPLE_COVERAGE_ARB);
 586    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 587                    enable->SampleCoverageInvert,
 588                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 589    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 590    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 591                    enable->VertexProgram,
 592                    GL_VERTEX_PROGRAM_ARB);
 593    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 594                    enable->VertexProgramPointSize,
 595                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 596    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 597                    enable->VertexProgramTwoSide,
 598                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 599
 600 #undef TEST_AND_UPDATE
 601
 602    /* texture unit enables */
 603    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 604       if (ctx->Texture.Unit[i].Enabled != enable->Texture[i]) {
 605          ctx->Texture.Unit[i].Enabled = enable->Texture[i];
 606          if (ctx->Driver.Enable) {
 607             if (ctx->Driver.ActiveTexture) {
 608                (*ctx->Driver.ActiveTexture)(ctx, i);
 609             }
 610             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_1D,
 611                              (GLboolean) (enable->Texture[i] & TEXTURE_1D_BIT) );
 612             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_2D,
 613                              (GLboolean) (enable->Texture[i] & TEXTURE_2D_BIT) );
 614             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_3D,
 615                              (GLboolean) (enable->Texture[i] & TEXTURE_3D_BIT) );
 616             if (ctx->Extensions.ARB_texture_cube_map)
 617                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_CUBE_MAP_ARB,
 618                           (GLboolean) (enable->Texture[i] & TEXTURE_CUBE_BIT) );
 619             if (ctx->Extensions.NV_texture_rectangle)
 620                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_RECTANGLE_NV,
 621                           (GLboolean) (enable->Texture[i] & TEXTURE_RECT_BIT) );
 622          }
 623       }
 624
 625       if (ctx->Texture.Unit[i].TexGenEnabled != enable->TexGen[i]) {
 626          ctx->Texture.Unit[i].TexGenEnabled = enable->TexGen[i];
 627          if (ctx->Driver.Enable) {
 628             if (ctx->Driver.ActiveTexture) {
 629                (*ctx->Driver.ActiveTexture)(ctx, i);
 630             }
 631             if (enable->TexGen[i] & S_BIT)
 632                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_TRUE);
 633             else
 634                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_FALSE);
 635             if (enable->TexGen[i] & T_BIT)
 636                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_TRUE);
 637             else
 638                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_FALSE);
 639             if (enable->TexGen[i] & R_BIT)
 640                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_TRUE);
 641             else
 642                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_FALSE);
 643             if (enable->TexGen[i] & Q_BIT)
 644                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
 645             else
 646                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
 647          }
 648       }
 649
 650       /* GL_SGI_texture_color_table */
 651       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 652    }
 653
 654    if (ctx->Driver.ActiveTexture) {
 655       (*ctx->Driver.ActiveTexture)(ctx, ctx->Texture.CurrentUnit);
 656    }
 657 }
 658
 659
 660 /**
 661  * Pop/restore texture attribute/group state.
 662  */
 663 static void
 664 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 665 {
 666    GLuint u;
 667
 668    _mesa_lock_context_textures(ctx);
 669
 670    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 671       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 672       GLuint tgt;
 673
 674       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 675       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 676                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 677       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 678                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 679       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 680                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 681       if (ctx->Extensions.ARB_texture_cube_map) {
 682          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 683                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 684       }
 685       if (ctx->Extensions.NV_texture_rectangle) {
 686          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 687                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 688       }
 689       if (ctx->Extensions.SGI_texture_color_table) {
 690          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 691                           unit->ColorTableEnabled);
 692       }
 693       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 694       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 695       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenModeS);
 696       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenModeT);
 697       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenModeR);
 698       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenModeQ);
 699       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->ObjectPlaneS);
 700       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->ObjectPlaneT);
 701       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->ObjectPlaneR);
 702       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->ObjectPlaneQ);
 703       /* Eye plane done differently to avoid re-transformation */
 704       {
 705          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 706          COPY_4FV(destUnit->EyePlaneS, unit->EyePlaneS);
 707          COPY_4FV(destUnit->EyePlaneT, unit->EyePlaneT);
 708          COPY_4FV(destUnit->EyePlaneR, unit->EyePlaneR);
 709          COPY_4FV(destUnit->EyePlaneQ, unit->EyePlaneQ);
 710          if (ctx->Driver.TexGen) {
 711             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->EyePlaneS);
 712             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->EyePlaneT);
 713             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->EyePlaneR);
 714             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->EyePlaneQ);
 715          }
 716       }
 717       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 718                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 719       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 720                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 721       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 722                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 723       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 724                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 725       if (ctx->Extensions.EXT_texture_lod_bias) {
 726          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 727                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 728       }
 729       if (ctx->Extensions.EXT_texture_env_combine ||
 730           ctx->Extensions.ARB_texture_env_combine) {
 731          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 732                        unit->Combine.ModeRGB);
 733          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 734                        unit->Combine.ModeA);
 735          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 736                        unit->Combine.SourceRGB[0]);
 737          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 738                        unit->Combine.SourceRGB[1]);
 739          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 740                        unit->Combine.SourceRGB[2]);
 741          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 742                        unit->Combine.SourceA[0]);
 743          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 744                        unit->Combine.SourceA[1]);
 745          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 746                        unit->Combine.SourceA[2]);
 747          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 748                        unit->Combine.OperandRGB[0]);
 749          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 750                        unit->Combine.OperandRGB[1]);
 751          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 752                        unit->Combine.OperandRGB[2]);
 753          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 754                        unit->Combine.OperandA[0]);
 755          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 756                        unit->Combine.OperandA[1]);
 757          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 758                        unit->Combine.OperandA[2]);
 759          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 760                        1 << unit->Combine.ScaleShiftRGB);
 761          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 762                        1 << unit->Combine.ScaleShiftA);
 763       }
 764
 765       /* Restore texture object state for each target */
 766       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 767          const struct gl_texture_object *obj = NULL;
 768          GLfloat bordColor[4];
 769          GLenum target;
 770
 771          obj = &texstate->SavedObj[u][tgt];
 772
 773          /* don't restore state for unsupported targets to prevent
 774           * raising GL errors.
 775           */
 776          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 777              !ctx->Extensions.ARB_texture_cube_map) {
 778             continue;
 779          }
 780          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 781                   !ctx->Extensions.NV_texture_rectangle) {
 782             continue;
 783          }
 784          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 785                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 786                   !ctx->Extensions.MESA_texture_array) {
 787             continue;
 788          }
 789
 790          target = obj->Target;
 791
 792          _mesa_BindTexture(target, obj->Name);
 793
 794          bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
 795          bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
 796          bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
 797          bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
 798
 799          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
 800          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 801          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 802          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 803          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 804          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 805          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 806          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 807          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 808          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 809          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 810          if (target != GL_TEXTURE_RECTANGLE_ARB)
 811             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 812          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 813             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 814                                 obj->MaxAnisotropy);
 815          }
 816          if (ctx->Extensions.SGIX_shadow) {
 817             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
 818                                 obj->CompareFlag);
 819             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
 820                                 obj->CompareOperator);
 821          }
 822          if (ctx->Extensions.SGIX_shadow_ambient) {
 823             _mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
 824                                 obj->ShadowAmbient);
 825          }
 826       }
 827
 828       /* remove saved references to the texture objects */
 829       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 830          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 831       }
 832    }
 833
 834    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 835
 836    _mesa_unlock_context_textures(ctx);
 837 }
 838
 839
 840 /*
 841  * This function is kind of long just because we have to call a lot
 842  * of device driver functions to update device driver state.
 843  *
 844  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 845  * in order to restore GL state.  This isn't terribly efficient but it
 846  * ensures that dirty flags and any derived state gets updated correctly.
 847  * We could at least check if the value to restore equals the current value
 848  * and then skip the Mesa call.
 849  */
 850 void GLAPIENTRY
 851 _mesa_PopAttrib(void)
 852 {
 853    struct gl_attrib_node *attr, *next;
 854    GET_CURRENT_CONTEXT(ctx);
 855    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 856
 857    if (ctx->AttribStackDepth == 0) {
 858       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 859       return;
 860    }
 861
 862    ctx->AttribStackDepth--;
 863    attr = ctx->AttribStack[ctx->AttribStackDepth];
 864
 865    while (attr) {
 866
 867       if (MESA_VERBOSE & VERBOSE_API) {
 868          _mesa_debug(ctx, "glPopAttrib %s\n",
 869                      _mesa_lookup_enum_by_nr(attr->kind));
 870       }
 871
 872       switch (attr->kind) {
 873          case GL_ACCUM_BUFFER_BIT:
 874             {
 875                const struct gl_accum_attrib *accum;
 876                accum = (const struct gl_accum_attrib *) attr->data;
 877                _mesa_ClearAccum(accum->ClearColor[0],
 878                                 accum->ClearColor[1],
 879                                 accum->ClearColor[2],
 880                                 accum->ClearColor[3]);
 881             }
 882             break;
 883          case GL_COLOR_BUFFER_BIT:
 884             {
 885                const struct gl_colorbuffer_attrib *color;
 886                color = (const struct gl_colorbuffer_attrib *) attr->data;
 887                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 888                _mesa_ClearColor(color->ClearColor[0],
 889                                 color->ClearColor[1],
 890                                 color->ClearColor[2],
 891                                 color->ClearColor[3]);
 892                _mesa_IndexMask(color->IndexMask);
 893                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 894                                (GLboolean) (color->ColorMask[1] != 0),
 895                                (GLboolean) (color->ColorMask[2] != 0),
 896                                (GLboolean) (color->ColorMask[3] != 0));
 897                {
 898                   /* Need to determine if more than one color output is
 899                    * specified.  If so, call glDrawBuffersARB, else call
 900                    * glDrawBuffer().  This is a subtle, but essential point
 901                    * since GL_FRONT (for example) is illegal for the former
 902                    * function, but legal for the later.
 903                    */
 904                   GLboolean multipleBuffers = GL_FALSE;
 905                   if (ctx->Extensions.ARB_draw_buffers) {
 906                      GLuint i;
 907                      for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 908                         if (color->DrawBuffer[i] != GL_NONE) {
 909                            multipleBuffers = GL_TRUE;
 910                            break;
 911                         }
 912                      }
 913                   }
 914                   /* Call the API_level functions, not _mesa_drawbuffers()
 915                    * since we need to do error checking on the pop'd
 916                    * GL_DRAW_BUFFER.
 917                    * Ex: if GL_FRONT were pushed, but we're popping with a
 918                    * user FBO bound, GL_FRONT will be illegal and we'll need
 919                    * to record that error.  Per OpenGL ARB decision.
 920                    */
 921                   if (multipleBuffers)
 922                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 923                                           color->DrawBuffer);
 924                   else
 925                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 926                }
 927                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 928                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 929                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
 930                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 931                                           color->BlendDstRGB,
 932                                           color->BlendSrcA,
 933                                           color->BlendDstA);
 934                /* This special case is because glBlendEquationSeparateEXT
 935                 * cannot take GL_LOGIC_OP as a parameter.
 936                 */
 937                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 938                   _mesa_BlendEquation(color->BlendEquationRGB);
 939                }
 940                else {
 941                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 942                                                  color->BlendEquationA);
 943                }
 944                _mesa_BlendColor(color->BlendColor[0],
 945                                 color->BlendColor[1],
 946                                 color->BlendColor[2],
 947                                 color->BlendColor[3]);
 948                _mesa_LogicOp(color->LogicOp);
 949                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 950                                 color->ColorLogicOpEnabled);
 951                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 952                                 color->IndexLogicOpEnabled);
 953                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 954             }
 955             break;
 956          case GL_CURRENT_BIT:
 957             FLUSH_CURRENT( ctx, 0 );
 958             MEMCPY( &ctx->Current, attr->data,
 959                     sizeof(struct gl_current_attrib) );
 960             break;
 961          case GL_DEPTH_BUFFER_BIT:
 962             {
 963                const struct gl_depthbuffer_attrib *depth;
 964                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 965                _mesa_DepthFunc(depth->Func);
 966                _mesa_ClearDepth(depth->Clear);
 967                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 968                _mesa_DepthMask(depth->Mask);
 969             }
 970             break;
 971          case GL_ENABLE_BIT:
 972             {
 973                const struct gl_enable_attrib *enable;
 974                enable = (const struct gl_enable_attrib *) attr->data;
 975                pop_enable_group(ctx, enable);
 976                ctx->NewState |= _NEW_ALL;
 977             }
 978             break;
 979          case GL_EVAL_BIT:
 980             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 981             ctx->NewState |= _NEW_EVAL;
 982             break;
 983          case GL_FOG_BIT:
 984             {
 985                const struct gl_fog_attrib *fog;
 986                fog = (const struct gl_fog_attrib *) attr->data;
 987                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 988                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 989                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 990                _mesa_Fogf(GL_FOG_START, fog->Start);
 991                _mesa_Fogf(GL_FOG_END, fog->End);
 992                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
 993                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
 994             }
 995             break;
 996          case GL_HINT_BIT:
 997             {
 998                const struct gl_hint_attrib *hint;
 999                hint = (const struct gl_hint_attrib *) attr->data;
1000                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1001                           hint->PerspectiveCorrection );
1002                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1003                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1004                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1005                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1006                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1007                           hint->ClipVolumeClipping);
1008                if (ctx->Extensions.ARB_texture_compression)
1009                   _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1010                              hint->TextureCompression);
1011             }
1012             break;
1013          case GL_LIGHTING_BIT:
1014             {
1015                GLuint i;
1016                const struct gl_light_attrib *light;
1017                light = (const struct gl_light_attrib *) attr->data;
1018                /* lighting enable */
1019                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1020                /* per-light state */
1021                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1022                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1023
1024                for (i = 0; i < ctx->Const.MaxLights; i++) {
1025                   const struct gl_light *l = &light->Light[i];
1026                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1027                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1028                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1029                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1030                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1031                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->EyeDirection);
1032                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1033                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1034                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1035                               &l->ConstantAttenuation);
1036                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1037                               &l->LinearAttenuation);
1038                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1039                               &l->QuadraticAttenuation);
1040                }
1041                /* light model */
1042                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1043                                   light->Model.Ambient);
1044                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1045                                  (GLfloat) light->Model.LocalViewer);
1046                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1047                                  (GLfloat) light->Model.TwoSide);
1048                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1049                                  (GLfloat) light->Model.ColorControl);
1050                /* shade model */
1051                _mesa_ShadeModel(light->ShadeModel);
1052                /* color material */
1053                _mesa_ColorMaterial(light->ColorMaterialFace,
1054                                    light->ColorMaterialMode);
1055                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1056                                 light->ColorMaterialEnabled);
1057                /* materials */
1058                MEMCPY(&ctx->Light.Material, &light->Material,
1059                       sizeof(struct gl_material));
1060             }
1061             break;
1062          case GL_LINE_BIT:
1063             {
1064                const struct gl_line_attrib *line;
1065                line = (const struct gl_line_attrib *) attr->data;
1066                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1067                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1068                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1069                _mesa_LineWidth(line->Width);
1070             }
1071             break;
1072          case GL_LIST_BIT:
1073             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1074             break;
1075          case GL_PIXEL_MODE_BIT:
1076             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1077             /* XXX what other pixel state needs to be set by function calls? */
1078             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1079             ctx->NewState |= _NEW_PIXEL;
1080             break;
1081          case GL_POINT_BIT:
1082             {
1083                const struct gl_point_attrib *point;
1084                point = (const struct gl_point_attrib *) attr->data;
1085                _mesa_PointSize(point->Size);
1086                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1087                if (ctx->Extensions.EXT_point_parameters) {
1088                   _mesa_PointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
1089                                             point->Params);
1090                   _mesa_PointParameterfEXT(GL_POINT_SIZE_MIN_EXT,
1091                                            point->MinSize);
1092                   _mesa_PointParameterfEXT(GL_POINT_SIZE_MAX_EXT,
1093                                            point->MaxSize);
1094                   _mesa_PointParameterfEXT(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1095                                            point->Threshold);
1096                }
1097                if (ctx->Extensions.NV_point_sprite
1098                    || ctx->Extensions.ARB_point_sprite) {
1099                   GLuint u;
1100                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1101                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1102                                    (GLint) point->CoordReplace[u]);
1103                   }
1104                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1105                   _mesa_PointParameteriNV(GL_POINT_SPRITE_R_MODE_NV,
1106                                           ctx->Point.SpriteRMode);
1107                   _mesa_PointParameterfEXT(GL_POINT_SPRITE_COORD_ORIGIN,
1108                                            (GLfloat)ctx->Point.SpriteOrigin);
1109                }
1110             }
1111             break;
1112          case GL_POLYGON_BIT:
1113             {
1114                const struct gl_polygon_attrib *polygon;
1115                polygon = (const struct gl_polygon_attrib *) attr->data;
1116                _mesa_CullFace(polygon->CullFaceMode);
1117                _mesa_FrontFace(polygon->FrontFace);
1118                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1119                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1120                _mesa_PolygonOffset(polygon->OffsetFactor,
1121                                    polygon->OffsetUnits);
1122                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1123                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1124                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1125                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1126                                 polygon->OffsetPoint);
1127                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1128                                 polygon->OffsetLine);
1129                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1130                                 polygon->OffsetFill);
1131             }
1132             break;
1133          case GL_POLYGON_STIPPLE_BIT:
1134             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1135             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1136             if (ctx->Driver.PolygonStipple)
1137                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1138             break;
1139          case GL_SCISSOR_BIT:
1140             {
1141                const struct gl_scissor_attrib *scissor;
1142                scissor = (const struct gl_scissor_attrib *) attr->data;
1143                _mesa_Scissor(scissor->X, scissor->Y,
1144                              scissor->Width, scissor->Height);
1145                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1146             }
1147             break;
1148          case GL_STENCIL_BUFFER_BIT:
1149             {
1150                const struct gl_stencil_attrib *stencil;
1151                stencil = (const struct gl_stencil_attrib *) attr->data;
1152                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1153                _mesa_ClearStencil(stencil->Clear);
1154                if (ctx->Extensions.EXT_stencil_two_side) {
1155                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1156                                    stencil->TestTwoSide);
1157                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1158                                              ? GL_BACK : GL_FRONT);
1159                }
1160                /* front state */
1161                _mesa_StencilFuncSeparate(GL_FRONT,
1162                                          stencil->Function[0],
1163                                          stencil->Ref[0],
1164                                          stencil->ValueMask[0]);
1165                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1166                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1167                                        stencil->ZFailFunc[0],
1168                                        stencil->ZPassFunc[0]);
1169                /* back state */
1170                _mesa_StencilFuncSeparate(GL_BACK,
1171                                          stencil->Function[1],
1172                                          stencil->Ref[1],
1173                                          stencil->ValueMask[1]);
1174                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1175                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1176                                        stencil->ZFailFunc[1],
1177                                        stencil->ZPassFunc[1]);
1178             }
1179             break;
1180          case GL_TRANSFORM_BIT:
1181             {
1182                GLuint i;
1183                const struct gl_transform_attrib *xform;
1184                xform = (const struct gl_transform_attrib *) attr->data;
1185                _mesa_MatrixMode(xform->MatrixMode);
1186                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1187                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1188
1189                /* restore clip planes */
1190                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1191                   const GLuint mask = 1 << 1;
1192                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1193                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1194                   if (xform->ClipPlanesEnabled & mask) {
1195                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1196                   }
1197                   else {
1198                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1199                   }
1200                   if (ctx->Driver.ClipPlane)
1201                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1202                }
1203
1204                /* normalize/rescale */
1205                if (xform->Normalize != ctx->Transform.Normalize)
1206                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1207                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1208                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1209                                    ctx->Transform.RescaleNormals);
1210             }
1211             break;
1212          case GL_TEXTURE_BIT:
1213             /* Take care of texture object reference counters */
1214             {
1215                struct texture_state *texstate
1216                   = (struct texture_state *) attr->data;
1217                pop_texture_group(ctx, texstate);
1218                ctx->NewState |= _NEW_TEXTURE;
1219             }
1220             break;
1221          case GL_VIEWPORT_BIT:
1222             {
1223                const struct gl_viewport_attrib *vp;
1224                vp = (const struct gl_viewport_attrib *) attr->data;
1225                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1226                _mesa_DepthRange(vp->Near, vp->Far);
1227             }
1228             break;
1229          case GL_MULTISAMPLE_BIT_ARB:
1230             {
1231                const struct gl_multisample_attrib *ms;
1232                ms = (const struct gl_multisample_attrib *) attr->data;
1233                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1234                                        ms->SampleCoverageInvert);
1235             }
1236             break;
1237
1238          default:
1239             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1240             break;
1241       }
1242
1243       next = attr->next;
1244       FREE( attr->data );
1245       FREE( attr );
1246       attr = next;
1247    }
1248 }
1249
1250
1251 /**
1252  * Helper for incrementing/decrementing vertex buffer object reference
1253  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1254  */
1255 static void
1256 adjust_buffer_object_ref_counts(struct gl_array_attrib *array, GLint step)
1257 {
1258    GLuint i;
1259    array->ArrayObj->Vertex.BufferObj->RefCount += step;
1260    array->ArrayObj->Normal.BufferObj->RefCount += step;
1261    array->ArrayObj->Color.BufferObj->RefCount += step;
1262    array->ArrayObj->SecondaryColor.BufferObj->RefCount += step;
1263    array->ArrayObj->FogCoord.BufferObj->RefCount += step;
1264    array->ArrayObj->Index.BufferObj->RefCount += step;
1265    array->ArrayObj->EdgeFlag.BufferObj->RefCount += step;
1266    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
1267       array->ArrayObj->TexCoord[i].BufferObj->RefCount += step;
1268    for (i = 0; i < VERT_ATTRIB_MAX; i++)
1269       array->ArrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1270
1271    array->ArrayBufferObj->RefCount += step;
1272    array->ElementArrayBufferObj->RefCount += step;
1273 }
1274
1275
1276 #define GL_CLIENT_PACK_BIT (1<<20)
1277 #define GL_CLIENT_UNPACK_BIT (1<<21)
1278
1279
1280 void GLAPIENTRY
1281 _mesa_PushClientAttrib(GLbitfield mask)
1282 {
1283    struct gl_attrib_node *newnode;
1284    struct gl_attrib_node *head;
1285
1286    GET_CURRENT_CONTEXT(ctx);
1287    ASSERT_OUTSIDE_BEGIN_END(ctx);
1288
1289    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1290       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1291       return;
1292    }
1293
1294    /* Build linked list of attribute nodes which save all attribute */
1295    /* groups specified by the mask. */
1296    head = NULL;
1297
1298    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1299       struct gl_pixelstore_attrib *attr;
1300 #if FEATURE_EXT_pixel_buffer_object
1301       ctx->Pack.BufferObj->RefCount++;
1302       ctx->Unpack.BufferObj->RefCount++;
1303 #endif
1304       /* packing attribs */
1305       attr = MALLOC_STRUCT( gl_pixelstore_attrib );
1306       MEMCPY( attr, &ctx->Pack, sizeof(struct gl_pixelstore_attrib) );
1307       newnode = new_attrib_node( GL_CLIENT_PACK_BIT );
1308       newnode->data = attr;
1309       newnode->next = head;
1310       head = newnode;
1311       /* unpacking attribs */
1312       attr = MALLOC_STRUCT( gl_pixelstore_attrib );
1313       MEMCPY( attr, &ctx->Unpack, sizeof(struct gl_pixelstore_attrib) );
1314       newnode = new_attrib_node( GL_CLIENT_UNPACK_BIT );
1315       newnode->data = attr;
1316       newnode->next = head;
1317       head = newnode;
1318    }
1319    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1320       struct gl_array_attrib *attr;
1321       struct gl_array_object *obj;
1322
1323       attr = MALLOC_STRUCT( gl_array_attrib );
1324       obj = MALLOC_STRUCT( gl_array_object );
1325
1326 #if FEATURE_ARB_vertex_buffer_object
1327       /* increment ref counts since we're copying pointers to these objects */
1328       ctx->Array.ArrayBufferObj->RefCount++;
1329       ctx->Array.ElementArrayBufferObj->RefCount++;
1330 #endif
1331
1332       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1333       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1334
1335       attr->ArrayObj = obj;
1336
1337       newnode = new_attrib_node( GL_CLIENT_VERTEX_ARRAY_BIT );
1338       newnode->data = attr;
1339       newnode->next = head;
1340       head = newnode;
1341       /* bump reference counts on buffer objects */
1342       adjust_buffer_object_ref_counts(&ctx->Array, 1);
1343    }
1344
1345    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1346    ctx->ClientAttribStackDepth++;
1347 }
1348
1349
1350
1351
1352 void GLAPIENTRY
1353 _mesa_PopClientAttrib(void)
1354 {
1355    struct gl_attrib_node *attr, *next;
1356
1357    GET_CURRENT_CONTEXT(ctx);
1358    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1359
1360    if (ctx->ClientAttribStackDepth == 0) {
1361       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1362       return;
1363    }
1364
1365    ctx->ClientAttribStackDepth--;
1366    attr = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1367
1368    while (attr) {
1369       switch (attr->kind) {
1370          case GL_CLIENT_PACK_BIT:
1371 #if FEATURE_EXT_pixel_buffer_object
1372             ctx->Pack.BufferObj->RefCount--;
1373             if (ctx->Pack.BufferObj->RefCount <= 0) {
1374                _mesa_remove_buffer_object( ctx, ctx->Pack.BufferObj );
1375                (*ctx->Driver.DeleteBuffer)( ctx, ctx->Pack.BufferObj );
1376             }
1377 #endif
1378             MEMCPY( &ctx->Pack, attr->data,
1379                     sizeof(struct gl_pixelstore_attrib) );
1380             ctx->NewState |= _NEW_PACKUNPACK;
1381             break;
1382          case GL_CLIENT_UNPACK_BIT:
1383 #if FEATURE_EXT_pixel_buffer_object
1384             ctx->Unpack.BufferObj->RefCount--;
1385             if (ctx->Unpack.BufferObj->RefCount <= 0) {
1386                _mesa_remove_buffer_object( ctx, ctx->Unpack.BufferObj );
1387                (*ctx->Driver.DeleteBuffer)( ctx, ctx->Unpack.BufferObj );
1388             }
1389 #endif
1390             MEMCPY( &ctx->Unpack, attr->data,
1391                     sizeof(struct gl_pixelstore_attrib) );
1392             ctx->NewState |= _NEW_PACKUNPACK;
1393             break;
1394          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1395             struct gl_array_attrib * data =
1396               (struct gl_array_attrib *) attr->data;
1397
1398             adjust_buffer_object_ref_counts(&ctx->Array, -1);
1399
1400             ctx->Array.ActiveTexture = data->ActiveTexture;
1401             ctx->Array.LockFirst = data->LockFirst;
1402             ctx->Array.LockCount = data->LockCount;
1403
1404             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1405
1406 #if FEATURE_ARB_vertex_buffer_object
1407             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1408                                 data->ArrayBufferObj->Name);
1409             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1410                                 data->ElementArrayBufferObj->Name);
1411 #endif
1412
1413             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1414                     sizeof( struct gl_array_object ) );
1415
1416             FREE( data->ArrayObj );
1417
1418             /* FIXME: Should some bits in ctx->Array->NewState also be set
1419              * FIXME: here?  It seems like it should be set to inclusive-or
1420              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1421              */
1422
1423             ctx->NewState |= _NEW_ARRAY;
1424             break;
1425          }
1426          default:
1427             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1428             break;
1429       }
1430
1431       next = attr->next;
1432       FREE( attr->data );
1433       FREE( attr );
1434       attr = next;
1435    }
1436 }
1437
1438
1439 /**
1440  * Free any attribute state data that might be attached to the context.
1441  */
1442 void
1443 _mesa_free_attrib_data(GLcontext *ctx)
1444 {
1445    while (ctx->AttribStackDepth > 0) {
1446       struct gl_attrib_node *attr, *next;
1447
1448       ctx->AttribStackDepth--;
1449       attr = ctx->AttribStack[ctx->AttribStackDepth];
1450
1451       while (attr) {
1452          if (attr->kind == GL_TEXTURE_BIT) {
1453             struct texture_state *texstate = (struct texture_state*)attr->data;
1454             GLuint u, tgt;
1455             /* clear references to the saved texture objects */
1456             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1457                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1458                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1459                }
1460             }
1461          }
1462          else {
1463             /* any other chunks of state that requires special handling? */
1464          }
1465
1466          next = attr->next;
1467          _mesa_free(attr->data);
1468          _mesa_free(attr);
1469          attr = next;
1470       }
1471    }
1472 }
1473
1474
1475 void _mesa_init_attrib( GLcontext *ctx )
1476 {
1477    /* Renderer and client attribute stacks */
1478    ctx->AttribStackDepth = 0;
1479    ctx->ClientAttribStackDepth = 0;
1480 }