dll/opengl/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.6
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <precomp.h>
  27
  28 /**
  29  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  30  */
  31 struct gl_enable_attrib
  32 {
  33    GLboolean AlphaTest;
  34    GLboolean AutoNormal;
  35    GLboolean Blend;
  36    GLbitfield ClipPlanes;
  37    GLboolean ColorMaterial;
  38    GLboolean CullFace;
  39    GLboolean DepthTest;
  40    GLboolean Dither;
  41    GLboolean Fog;
  42    GLboolean Light[MAX_LIGHTS];
  43    GLboolean Lighting;
  44    GLboolean LineSmooth;
  45    GLboolean LineStipple;
  46    GLboolean IndexLogicOp;
  47    GLboolean ColorLogicOp;
  48
  49    GLboolean Map1Color4;
  50    GLboolean Map1Index;
  51    GLboolean Map1Normal;
  52    GLboolean Map1TextureCoord1;
  53    GLboolean Map1TextureCoord2;
  54    GLboolean Map1TextureCoord3;
  55    GLboolean Map1TextureCoord4;
  56    GLboolean Map1Vertex3;
  57    GLboolean Map1Vertex4;
  58    GLboolean Map2Color4;
  59    GLboolean Map2Index;
  60    GLboolean Map2Normal;
  61    GLboolean Map2TextureCoord1;
  62    GLboolean Map2TextureCoord2;
  63    GLboolean Map2TextureCoord3;
  64    GLboolean Map2TextureCoord4;
  65    GLboolean Map2Vertex3;
  66    GLboolean Map2Vertex4;
  67
  68    GLboolean Normalize;
  69    GLboolean PixelTexture;
  70    GLboolean PointSmooth;
  71    GLboolean PolygonOffsetPoint;
  72    GLboolean PolygonOffsetLine;
  73    GLboolean PolygonOffsetFill;
  74    GLboolean PolygonSmooth;
  75    GLboolean PolygonStipple;
  76    GLboolean RescaleNormals;
  77    GLboolean Scissor;
  78    GLboolean Stencil;
  79    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
  80    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
  81    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
  82    GLboolean SampleCoverage;          /* GL_ARB_multisample */
  83    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
  84
  85    GLbitfield Texture;
  86    GLbitfield TexGen;
  87
  88    /* GL_ARB_point_sprite / GL_NV_point_sprite */
  89    GLboolean PointSprite;
  90 };
  91
  92
  93 /**
  94  * Node for the attribute stack.
  95  */
  96 struct gl_attrib_node
  97 {
  98    GLbitfield kind;
  99    void *data;
 100    struct gl_attrib_node *next;
 101 };
 102
 103
 104
 105 /**
 106  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 107  */
 108 struct texture_state
 109 {
 110    struct gl_texture_attrib Texture;  /**< The usual context state */
 111
 112    /** to save per texture object state (wrap modes, filters, etc): */
 113    struct gl_texture_object SavedObj[NUM_TEXTURE_TARGETS];
 114
 115    /**
 116     * To save references to texture objects (so they don't get accidentally
 117     * deleted while saved in the attribute stack).
 118     */
 119    struct gl_texture_object *SavedTexRef[NUM_TEXTURE_TARGETS];
 120
 121    /* We need to keep a reference to the shared state.  That's where the
 122     * default texture objects are kept.  We don't want that state to be
 123     * freed while the attribute stack contains pointers to any default
 124     * texture objects.
 125     */
 126    struct gl_shared_state *SharedRef;
 127 };
 128
 129
 130 #if FEATURE_attrib_stack
 131
 132
 133 /**
 134  * Allocate new attribute node of given type/kind.  Attach payload data.
 135  * Insert it into the linked list named by 'head'.
 136  */
 137 static void
 138 save_attrib_data(struct gl_attrib_node **head,
 139                  GLbitfield kind, void *payload)
 140 {
 141    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 142    if (n) {
 143       n->kind = kind;
 144       n->data = payload;
 145       /* insert at head */
 146       n->next = *head;
 147       *head = n;
 148    }
 149    else {
 150       /* out of memory! */
 151    }
 152 }
 153
 154
 155 void GLAPIENTRY
 156 _mesa_PushAttrib(GLbitfield mask)
 157 {
 158    struct gl_attrib_node *head;
 159
 160    GET_CURRENT_CONTEXT(ctx);
 161    ASSERT_OUTSIDE_BEGIN_END(ctx);
 162
 163    if (MESA_VERBOSE & VERBOSE_API)
 164       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 165
 166    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 167       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 168       return;
 169    }
 170
 171    /* Build linked list of attribute nodes which save all attribute */
 172    /* groups specified by the mask. */
 173    head = NULL;
 174
 175    if (mask & GL_ACCUM_BUFFER_BIT) {
 176       struct gl_accum_attrib *attr;
 177       attr = MALLOC_STRUCT( gl_accum_attrib );
 178       memcpy( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 179       save_attrib_data(&head, GL_ACCUM_BUFFER_BIT, attr);
 180    }
 181
 182    if (mask & GL_COLOR_BUFFER_BIT) {
 183       struct gl_colorbuffer_attrib *attr;
 184       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 185       memcpy( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 186       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 187       attr->DrawBuffer = ctx->DrawBuffer->ColorDrawBuffer;
 188       save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr);
 189    }
 190
 191    if (mask & GL_CURRENT_BIT) {
 192       struct gl_current_attrib *attr;
 193       FLUSH_CURRENT( ctx, 0 );
 194       attr = MALLOC_STRUCT( gl_current_attrib );
 195       memcpy( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 196       save_attrib_data(&head, GL_CURRENT_BIT, attr);
 197    }
 198
 199    if (mask & GL_DEPTH_BUFFER_BIT) {
 200       struct gl_depthbuffer_attrib *attr;
 201       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 202       memcpy( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 203       save_attrib_data(&head, GL_DEPTH_BUFFER_BIT, attr);
 204    }
 205
 206    if (mask & GL_ENABLE_BIT) {
 207       struct gl_enable_attrib *attr;
 208       GLuint i;
 209       attr = MALLOC_STRUCT( gl_enable_attrib );
 210       /* Copy enable flags from all other attributes into the enable struct. */
 211       attr->AlphaTest = ctx->Color.AlphaEnabled;
 212       attr->AutoNormal = ctx->Eval.AutoNormal;
 213       attr->Blend = ctx->Color.BlendEnabled;
 214       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 215       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 216       attr->CullFace = ctx->Polygon.CullFlag;
 217       attr->DepthTest = ctx->Depth.Test;
 218       attr->Dither = ctx->Color.DitherFlag;
 219       attr->Fog = ctx->Fog.Enabled;
 220       for (i = 0; i < ctx->Const.MaxLights; i++) {
 221          attr->Light[i] = ctx->Light.Light[i].Enabled;
 222       }
 223       attr->Lighting = ctx->Light.Enabled;
 224       attr->LineSmooth = ctx->Line.SmoothFlag;
 225       attr->LineStipple = ctx->Line.StippleFlag;
 226       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 227       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 228       attr->Map1Color4 = ctx->Eval.Map1Color4;
 229       attr->Map1Index = ctx->Eval.Map1Index;
 230       attr->Map1Normal = ctx->Eval.Map1Normal;
 231       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 232       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 233       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 234       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 235       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 236       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 237       attr->Map2Color4 = ctx->Eval.Map2Color4;
 238       attr->Map2Index = ctx->Eval.Map2Index;
 239       attr->Map2Normal = ctx->Eval.Map2Normal;
 240       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 241       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 242       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 243       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 244       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 245       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 246       attr->Normalize = ctx->Transform.Normalize;
 247       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 248       attr->PointSmooth = ctx->Point.SmoothFlag;
 249       attr->PointSprite = ctx->Point.PointSprite;
 250       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 251       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 252       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 253       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 254       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 255       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 256       attr->Scissor = ctx->Scissor.Enabled;
 257       attr->Stencil = ctx->Stencil.Enabled;
 258       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 259       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 260       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 261       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 262       attr->Texture = ctx->Texture.Unit.Enabled;
 263       attr->TexGen = ctx->Texture.Unit.TexGenEnabled;
 264       save_attrib_data(&head, GL_ENABLE_BIT, attr);
 265    }
 266
 267    if (mask & GL_EVAL_BIT) {
 268       struct gl_eval_attrib *attr;
 269       attr = MALLOC_STRUCT( gl_eval_attrib );
 270       memcpy( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 271       save_attrib_data(&head, GL_EVAL_BIT, attr);
 272    }
 273
 274    if (mask & GL_FOG_BIT) {
 275       struct gl_fog_attrib *attr;
 276       attr = MALLOC_STRUCT( gl_fog_attrib );
 277       memcpy( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 278       save_attrib_data(&head, GL_FOG_BIT, attr);
 279    }
 280
 281    if (mask & GL_HINT_BIT) {
 282       struct gl_hint_attrib *attr;
 283       attr = MALLOC_STRUCT( gl_hint_attrib );
 284       memcpy( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 285       save_attrib_data(&head, GL_HINT_BIT, attr);
 286    }
 287
 288    if (mask & GL_LIGHTING_BIT) {
 289       struct gl_light_attrib *attr;
 290       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 291       attr = MALLOC_STRUCT( gl_light_attrib );
 292       memcpy( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 293       save_attrib_data(&head, GL_LIGHTING_BIT, attr);
 294    }
 295
 296    if (mask & GL_LINE_BIT) {
 297       struct gl_line_attrib *attr;
 298       attr = MALLOC_STRUCT( gl_line_attrib );
 299       memcpy( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 300       save_attrib_data(&head, GL_LINE_BIT, attr);
 301    }
 302
 303    if (mask & GL_LIST_BIT) {
 304       struct gl_list_attrib *attr;
 305       attr = MALLOC_STRUCT( gl_list_attrib );
 306       memcpy( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 307       save_attrib_data(&head, GL_LIST_BIT, attr);
 308    }
 309
 310    if (mask & GL_PIXEL_MODE_BIT) {
 311       struct gl_pixel_attrib *attr;
 312       attr = MALLOC_STRUCT( gl_pixel_attrib );
 313       memcpy( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 314       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 315       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 316       save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr);
 317    }
 318
 319    if (mask & GL_POINT_BIT) {
 320       struct gl_point_attrib *attr;
 321       attr = MALLOC_STRUCT( gl_point_attrib );
 322       memcpy( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 323       save_attrib_data(&head, GL_POINT_BIT, attr);
 324    }
 325
 326    if (mask & GL_POLYGON_BIT) {
 327       struct gl_polygon_attrib *attr;
 328       attr = MALLOC_STRUCT( gl_polygon_attrib );
 329       memcpy( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 330       save_attrib_data(&head, GL_POLYGON_BIT, attr);
 331    }
 332
 333    if (mask & GL_POLYGON_STIPPLE_BIT) {
 334       GLuint *stipple;
 335       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 336       memcpy( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 337       save_attrib_data(&head, GL_POLYGON_STIPPLE_BIT, stipple);
 338    }
 339
 340    if (mask & GL_SCISSOR_BIT) {
 341       struct gl_scissor_attrib *attr;
 342       attr = MALLOC_STRUCT( gl_scissor_attrib );
 343       memcpy( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 344       save_attrib_data(&head, GL_SCISSOR_BIT, attr);
 345    }
 346
 347    if (mask & GL_STENCIL_BUFFER_BIT) {
 348       struct gl_stencil_attrib *attr;
 349       attr = MALLOC_STRUCT( gl_stencil_attrib );
 350       memcpy( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 351       save_attrib_data(&head, GL_STENCIL_BUFFER_BIT, attr);
 352    }
 353
 354    if (mask & GL_TEXTURE_BIT) {
 355       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 356       GLuint tex;
 357
 358       if (!texstate) {
 359          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 360          goto end;
 361       }
 362
 363       _mesa_lock_context_textures(ctx);
 364
 365       /* copy/save the bulk of texture state here */
 366       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 367
 368       /* Save references to the currently bound texture objects so they don't
 369        * accidentally get deleted while referenced in the attribute stack.
 370        */
 371       for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 372          _mesa_reference_texobj(&texstate->SavedTexRef[tex],
 373                                 ctx->Texture.Unit.CurrentTex[tex]);
 374       }
 375
 376       /* copy state/contents of the currently bound texture objects */
 377       for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 378          _mesa_copy_texture_object(&texstate->SavedObj[tex],
 379                                    ctx->Texture.Unit.CurrentTex[tex]);
 380       }
 381
 382       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 383
 384       _mesa_unlock_context_textures(ctx);
 385
 386       save_attrib_data(&head, GL_TEXTURE_BIT, texstate);
 387    }
 388
 389    if (mask & GL_TRANSFORM_BIT) {
 390       struct gl_transform_attrib *attr;
 391       attr = MALLOC_STRUCT( gl_transform_attrib );
 392       memcpy( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 393       save_attrib_data(&head, GL_TRANSFORM_BIT, attr);
 394    }
 395
 396    if (mask & GL_VIEWPORT_BIT) {
 397       struct gl_viewport_attrib *attr;
 398       attr = MALLOC_STRUCT( gl_viewport_attrib );
 399       memcpy( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 400       save_attrib_data(&head, GL_VIEWPORT_BIT, attr);
 401    }
 402
 403    /* GL_ARB_multisample */
 404    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 405       struct gl_multisample_attrib *attr;
 406       attr = MALLOC_STRUCT( gl_multisample_attrib );
 407       memcpy( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 408       save_attrib_data(&head, GL_MULTISAMPLE_BIT_ARB, attr);
 409    }
 410
 411 end:
 412    ctx->AttribStack[ctx->AttribStackDepth] = head;
 413    ctx->AttribStackDepth++;
 414 }
 415
 416
 417
 418 static void
 419 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 420 {
 421    GLuint i;
 422
 423 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 424         if ((VALUE) != (NEWVALUE)) {                    \
 425            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 426         }
 427
 428    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 429    if (ctx->Color.BlendEnabled != enable->Blend) {
 430       _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 431    }
 432
 433    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 434       const GLuint mask = 1 << i;
 435       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 436           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 437                            !!(enable->ClipPlanes & mask));
 438    }
 439
 440    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 441                    GL_COLOR_MATERIAL);
 442    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 443    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 444    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 445    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 446    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 447    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 448    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 449                    GL_LINE_STIPPLE);
 450    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 451                    GL_INDEX_LOGIC_OP);
 452    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 453                    GL_COLOR_LOGIC_OP);
 454
 455    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 456    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 457    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 458    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 459                    GL_MAP1_TEXTURE_COORD_1);
 460    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 461                    GL_MAP1_TEXTURE_COORD_2);
 462    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 463                    GL_MAP1_TEXTURE_COORD_3);
 464    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 465                    GL_MAP1_TEXTURE_COORD_4);
 466    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 467                    GL_MAP1_VERTEX_3);
 468    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 469                    GL_MAP1_VERTEX_4);
 470
 471    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 472    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 473    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 474    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 475                    GL_MAP2_TEXTURE_COORD_1);
 476    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 477                    GL_MAP2_TEXTURE_COORD_2);
 478    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 479                    GL_MAP2_TEXTURE_COORD_3);
 480    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 481                    GL_MAP2_TEXTURE_COORD_4);
 482    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 483                    GL_MAP2_VERTEX_3);
 484    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 485                    GL_MAP2_VERTEX_4);
 486
 487    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 488    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 489    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 490                    GL_RESCALE_NORMAL_EXT);
 491    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 492                    enable->RasterPositionUnclipped,
 493                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 494    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 495                    GL_POINT_SMOOTH);
 496    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 497       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 498                       GL_POINT_SPRITE_NV);
 499    }
 500    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 501                    GL_POLYGON_OFFSET_POINT);
 502    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 503                    GL_POLYGON_OFFSET_LINE);
 504    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 505                    GL_POLYGON_OFFSET_FILL);
 506    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 507                    GL_POLYGON_SMOOTH);
 508    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 509                    GL_POLYGON_STIPPLE);
 510    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 511    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 512    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 513                    GL_MULTISAMPLE_ARB);
 514    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 515                    enable->SampleAlphaToCoverage,
 516                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 517    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 518                    enable->SampleAlphaToOne,
 519                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 520    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 521                    enable->SampleCoverage,
 522                    GL_SAMPLE_COVERAGE_ARB);
 523
 524    /* texture unit enables */
 525    {
 526       const GLbitfield enabled = enable->Texture;
 527       const GLbitfield genEnabled = enable->TexGen;
 528
 529       if (ctx->Texture.Unit.Enabled != enabled) {
 530          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 531          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 532          if (ctx->Extensions.ARB_texture_cube_map) {
 533             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 534                              !!(enabled & TEXTURE_CUBE_BIT));
 535          }
 536       }
 537
 538       if (ctx->Texture.Unit.TexGenEnabled != genEnabled) {
 539          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 540          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 541          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 542          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 543       }
 544    }
 545 }
 546
 547
 548 /**
 549  * Pop/restore texture attribute/group state.
 550  */
 551 static void
 552 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 553 {
 554    const struct gl_texture_unit *unit;
 555    GLuint tgt;
 556
 557    _mesa_lock_context_textures(ctx);
 558
 559    unit = &texstate->Texture.Unit;
 560
 561    _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 562    _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 563
 564    _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 565    _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 566    _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 567    _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 568    _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 569    _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 570    _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 571    _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 572    _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 573    _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 574    /* Eye plane done differently to avoid re-transformation */
 575    {
 576       struct gl_texture_unit *destUnit = &ctx->Texture.Unit;
 577       COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 578       COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 579       COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 580       COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 581       if (ctx->Driver.TexGen) {
 582          ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 583          ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 584          ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 585          ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 586       }
 587    }
 588    _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 589    _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 590    _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 591    _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 592    _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 593       unit->LodBias);
 594    _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 595       unit->Combine.ModeRGB);
 596    _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 597       unit->Combine.ModeA);
 598    {
 599       const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 600       GLuint i;
 601       for (i = 0; i < n; i++) {
 602          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 603                        unit->Combine.SourceRGB[i]);
 604          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 605                        unit->Combine.SourceA[i]);
 606          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 607                        unit->Combine.OperandRGB[i]);
 608          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 609                        unit->Combine.OperandA[i]);
 610       }
 611    }
 612    _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE, 1 << unit->Combine.ScaleShiftRGB);
 613    _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1 << unit->Combine.ScaleShiftA);
 614
 615    /* Restore texture object state for each target */
 616    for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 617       const struct gl_texture_object *obj = NULL;
 618       const struct gl_sampler_object *samp;
 619       GLenum target;
 620
 621       obj = &texstate->SavedObj[tgt];
 622
 623       /* don't restore state for unsupported targets to prevent
 624        * raising GL errors.
 625        */
 626       if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 627           !ctx->Extensions.ARB_texture_cube_map) {
 628          continue;
 629       }
 630
 631       target = obj->Target;
 632
 633       _mesa_BindTexture(target, obj->Name);
 634
 635       samp = &obj->Sampler;
 636
 637       _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 638       _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 639       _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 640       _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 641       _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 642       _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 643       _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 644       if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 645          _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 646                              samp->MaxAnisotropy);
 647       }
 648    }
 649
 650    /* remove saved references to the texture objects */
 651    for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 652       _mesa_reference_texobj(&texstate->SavedTexRef[tgt], NULL);
 653    }
 654
 655    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 656
 657    _mesa_unlock_context_textures(ctx);
 658 }
 659
 660
 661 /*
 662  * This function is kind of long just because we have to call a lot
 663  * of device driver functions to update device driver state.
 664  *
 665  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 666  * in order to restore GL state.  This isn't terribly efficient but it
 667  * ensures that dirty flags and any derived state gets updated correctly.
 668  * We could at least check if the value to restore equals the current value
 669  * and then skip the Mesa call.
 670  */
 671 void GLAPIENTRY
 672 _mesa_PopAttrib(void)
 673 {
 674    struct gl_attrib_node *attr, *next;
 675    GET_CURRENT_CONTEXT(ctx);
 676    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 677
 678    if (ctx->AttribStackDepth == 0) {
 679       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 680       return;
 681    }
 682
 683    ctx->AttribStackDepth--;
 684    attr = ctx->AttribStack[ctx->AttribStackDepth];
 685
 686    while (attr) {
 687
 688       if (MESA_VERBOSE & VERBOSE_API) {
 689          _mesa_debug(ctx, "glPopAttrib %s\n",
 690                      _mesa_lookup_enum_by_nr(attr->kind));
 691       }
 692
 693       switch (attr->kind) {
 694          case GL_ACCUM_BUFFER_BIT:
 695             {
 696                const struct gl_accum_attrib *accum;
 697                accum = (const struct gl_accum_attrib *) attr->data;
 698                _mesa_ClearAccum(accum->ClearColor[0],
 699                                 accum->ClearColor[1],
 700                                 accum->ClearColor[2],
 701                                 accum->ClearColor[3]);
 702             }
 703             break;
 704          case GL_COLOR_BUFFER_BIT:
 705             {
 706                const struct gl_colorbuffer_attrib *color;
 707
 708                color = (const struct gl_colorbuffer_attrib *) attr->data;
 709                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 710                _mesa_ClearColor(color->ClearColor.f[0],
 711                                 color->ClearColor.f[1],
 712                                 color->ClearColor.f[2],
 713                                 color->ClearColor.f[3]);
 714                _mesa_IndexMask(color->IndexMask);
 715                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 716                                (GLboolean) (color->ColorMask[1] != 0),
 717                                (GLboolean) (color->ColorMask[2] != 0),
 718                                (GLboolean) (color->ColorMask[3] != 0));
 719                _mesa_DrawBuffer(color->DrawBuffer);
 720                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 721                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 722                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
 723                   _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
 724                }
 725                /* set same blend modes for all buffers */
 726                _mesa_BlendFunc(color->SrcFactor, color->DstFactor);
 727                _mesa_LogicOp(color->LogicOp);
 728                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 729                                 color->ColorLogicOpEnabled);
 730                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 731                                 color->IndexLogicOpEnabled);
 732                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 733             }
 734             break;
 735          case GL_CURRENT_BIT:
 736             FLUSH_CURRENT( ctx, 0 );
 737             memcpy( &ctx->Current, attr->data,
 738                     sizeof(struct gl_current_attrib) );
 739             break;
 740          case GL_DEPTH_BUFFER_BIT:
 741             {
 742                const struct gl_depthbuffer_attrib *depth;
 743                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 744                _mesa_DepthFunc(depth->Func);
 745                _mesa_ClearDepth(depth->Clear);
 746                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 747                _mesa_DepthMask(depth->Mask);
 748             }
 749             break;
 750          case GL_ENABLE_BIT:
 751             {
 752                const struct gl_enable_attrib *enable;
 753                enable = (const struct gl_enable_attrib *) attr->data;
 754                pop_enable_group(ctx, enable);
 755                ctx->NewState |= _NEW_ALL;
 756             }
 757             break;
 758          case GL_EVAL_BIT:
 759             memcpy( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 760             ctx->NewState |= _NEW_EVAL;
 761             break;
 762          case GL_FOG_BIT:
 763             {
 764                const struct gl_fog_attrib *fog;
 765                fog = (const struct gl_fog_attrib *) attr->data;
 766                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 767                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 768                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 769                _mesa_Fogf(GL_FOG_START, fog->Start);
 770                _mesa_Fogf(GL_FOG_END, fog->End);
 771                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
 772                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
 773             }
 774             break;
 775          case GL_HINT_BIT:
 776             {
 777                const struct gl_hint_attrib *hint;
 778                hint = (const struct gl_hint_attrib *) attr->data;
 779                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
 780                           hint->PerspectiveCorrection );
 781                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
 782                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
 783                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
 784                _mesa_Hint(GL_FOG_HINT, hint->Fog);
 785                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
 786                           hint->ClipVolumeClipping);
 787             }
 788             break;
 789          case GL_LIGHTING_BIT:
 790             {
 791                GLuint i;
 792                const struct gl_light_attrib *light;
 793                light = (const struct gl_light_attrib *) attr->data;
 794                /* lighting enable */
 795                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
 796                /* per-light state */
 797                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
 798                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
 799
 800                for (i = 0; i < ctx->Const.MaxLights; i++) {
 801                   const struct gl_light *l = &light->Light[i];
 802                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
 803                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
 804                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
 805                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
 806                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
 807                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
 808                   {
 809                      GLfloat p[4] = { 0 };
 810                      p[0] = l->SpotExponent;
 811                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
 812                   }
 813                   {
 814                      GLfloat p[4] = { 0 };
 815                      p[0] = l->SpotCutoff;
 816                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
 817                   }
 818                   {
 819                      GLfloat p[4] = { 0 };
 820                      p[0] = l->ConstantAttenuation;
 821                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
 822                   }
 823                   {
 824                      GLfloat p[4] = { 0 };
 825                      p[0] = l->LinearAttenuation;
 826                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
 827                   }
 828                   {
 829                      GLfloat p[4] = { 0 };
 830                      p[0] = l->QuadraticAttenuation;
 831                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
 832                   }
 833                }
 834                /* light model */
 835                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
 836                                   light->Model.Ambient);
 837                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
 838                                  (GLfloat) light->Model.LocalViewer);
 839                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
 840                                  (GLfloat) light->Model.TwoSide);
 841                /* shade model */
 842                _mesa_ShadeModel(light->ShadeModel);
 843                /* color material */
 844                _mesa_ColorMaterial(light->ColorMaterialFace,
 845                                    light->ColorMaterialMode);
 846                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
 847                                 light->ColorMaterialEnabled);
 848                /* materials */
 849                memcpy(&ctx->Light.Material, &light->Material,
 850                       sizeof(struct gl_material));
 851             }
 852             break;
 853          case GL_LINE_BIT:
 854             {
 855                const struct gl_line_attrib *line;
 856                line = (const struct gl_line_attrib *) attr->data;
 857                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
 858                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
 859                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
 860                _mesa_LineWidth(line->Width);
 861             }
 862             break;
 863          case GL_LIST_BIT:
 864             memcpy( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
 865             break;
 866          case GL_PIXEL_MODE_BIT:
 867             memcpy( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
 868             /* XXX what other pixel state needs to be set by function calls? */
 869             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
 870             ctx->NewState |= _NEW_PIXEL;
 871             break;
 872          case GL_POINT_BIT:
 873             {
 874                const struct gl_point_attrib *point;
 875                point = (const struct gl_point_attrib *) attr->data;
 876                _mesa_PointSize(point->Size);
 877                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
 878             }
 879             break;
 880          case GL_POLYGON_BIT:
 881             {
 882                const struct gl_polygon_attrib *polygon;
 883                polygon = (const struct gl_polygon_attrib *) attr->data;
 884                _mesa_CullFace(polygon->CullFaceMode);
 885                _mesa_FrontFace(polygon->FrontFace);
 886                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
 887                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
 888                _mesa_PolygonOffset(polygon->OffsetFactor,
 889                                    polygon->OffsetUnits);
 890                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
 891                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
 892                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
 893                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
 894                                 polygon->OffsetPoint);
 895                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
 896                                 polygon->OffsetLine);
 897                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
 898                                 polygon->OffsetFill);
 899             }
 900             break;
 901          case GL_POLYGON_STIPPLE_BIT:
 902             memcpy( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
 903             ctx->NewState |= _NEW_POLYGONSTIPPLE;
 904             if (ctx->Driver.PolygonStipple)
 905                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
 906             break;
 907          case GL_SCISSOR_BIT:
 908             {
 909                const struct gl_scissor_attrib *scissor;
 910                scissor = (const struct gl_scissor_attrib *) attr->data;
 911                _mesa_Scissor(scissor->X, scissor->Y,
 912                              scissor->Width, scissor->Height);
 913                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
 914             }
 915             break;
 916          case GL_STENCIL_BUFFER_BIT:
 917             {
 918                const struct gl_stencil_attrib *stencil;
 919                stencil = (const struct gl_stencil_attrib *) attr->data;
 920                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
 921                _mesa_ClearStencil(stencil->Clear);
 922                _mesa_StencilFunc(stencil->Function,
 923                                  stencil->Ref,
 924                                  stencil->ValueMask);
 925                _mesa_StencilMask(stencil->WriteMask);
 926                _mesa_StencilOp(stencil->FailFunc,
 927                                stencil->ZFailFunc,
 928                                stencil->ZPassFunc);
 929             }
 930             break;
 931          case GL_TRANSFORM_BIT:
 932             {
 933                GLuint i;
 934                const struct gl_transform_attrib *xform;
 935                xform = (const struct gl_transform_attrib *) attr->data;
 936                _mesa_MatrixMode(xform->MatrixMode);
 937                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
 938                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
 939
 940                /* restore clip planes */
 941                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
 942                   const GLuint mask = 1 << i;
 943                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
 944                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
 945                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
 946                                    !!(xform->ClipPlanesEnabled & mask));
 947                   if (ctx->Driver.ClipPlane)
 948                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
 949                }
 950
 951                /* normalize/rescale */
 952                if (xform->Normalize != ctx->Transform.Normalize)
 953                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
 954                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
 955                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
 956                                    ctx->Transform.RescaleNormals);
 957             }
 958             break;
 959          case GL_TEXTURE_BIT:
 960             /* Take care of texture object reference counters */
 961             {
 962                struct texture_state *texstate
 963                   = (struct texture_state *) attr->data;
 964                pop_texture_group(ctx, texstate);
 965                ctx->NewState |= _NEW_TEXTURE;
 966             }
 967             break;
 968          case GL_VIEWPORT_BIT:
 969             {
 970                const struct gl_viewport_attrib *vp;
 971                vp = (const struct gl_viewport_attrib *) attr->data;
 972                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
 973                _mesa_DepthRange(vp->Near, vp->Far);
 974             }
 975             break;
 976          case GL_MULTISAMPLE_BIT_ARB:
 977             {
 978                const struct gl_multisample_attrib *ms;
 979                ms = (const struct gl_multisample_attrib *) attr->data;
 980
 981                TEST_AND_UPDATE(ctx->Multisample.Enabled,
 982                                ms->Enabled,
 983                                GL_MULTISAMPLE);
 984
 985                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 986                                ms->SampleCoverage,
 987                                GL_SAMPLE_COVERAGE);
 988
 989                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 990                                ms->SampleAlphaToCoverage,
 991                                GL_SAMPLE_ALPHA_TO_COVERAGE);
 992
 993                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 994                                ms->SampleAlphaToOne,
 995                                GL_SAMPLE_ALPHA_TO_ONE);
 996
 997                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
 998                                        ms->SampleCoverageInvert);
 999             }
1000             break;
1001
1002          default:
1003             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1004             break;
1005       }
1006
1007       next = attr->next;
1008       FREE( attr->data );
1009       FREE( attr );
1010       attr = next;
1011    }
1012 }
1013
1014
1015 /**
1016  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1017  * object refcounts.
1018  */
1019 static void
1020 copy_pixelstore(struct gl_context *ctx,
1021                 struct gl_pixelstore_attrib *dst,
1022                 const struct gl_pixelstore_attrib *src)
1023 {
1024    dst->Alignment = src->Alignment;
1025    dst->RowLength = src->RowLength;
1026    dst->SkipPixels = src->SkipPixels;
1027    dst->SkipRows = src->SkipRows;
1028    dst->ImageHeight = src->ImageHeight;
1029    dst->SkipImages = src->SkipImages;
1030    dst->SwapBytes = src->SwapBytes;
1031    dst->LsbFirst = src->LsbFirst;
1032    dst->Invert = src->Invert;
1033 }
1034
1035
1036 #define GL_CLIENT_PACK_BIT (1<<20)
1037 #define GL_CLIENT_UNPACK_BIT (1<<21)
1038
1039 /**
1040  * Copy gl_array_attrib from src to dest.
1041  * 'dest' must be in an initialized state.
1042  */
1043 static void
1044 copy_array_attrib(struct gl_context *ctx,
1045                   struct gl_array_attrib *dest,
1046                   struct gl_array_attrib *src)
1047 {
1048     GLuint i;
1049
1050     /* skip ArrayObj */
1051     /* skip DefaultArrayObj, Objects */
1052     dest->LockFirst = src->LockFirst;
1053     dest->LockCount = src->LockCount;
1054     /* skip NewState */
1055     /* skip RebindArrays */
1056
1057
1058     /* skip Name */
1059     /* skip RefCount */
1060
1061     for (i = 0; i < Elements(src->VertexAttrib); i++)
1062         _mesa_copy_client_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1063
1064     /* _Enabled must be the same than on push */
1065     dest->_Enabled = src->_Enabled;
1066     dest->_MaxElement = src->_MaxElement;
1067
1068     /* skip ArrayBufferObj */
1069     /* skip ElementArrayBufferObj */
1070 }
1071
1072 /**
1073  * Save the content of src to dest.
1074  */
1075 static void
1076 save_array_attrib(struct gl_context *ctx,
1077                   struct gl_array_attrib *dest,
1078                   struct gl_array_attrib *src)
1079 {
1080    /* And copy all of the rest. */
1081    copy_array_attrib(ctx, dest, src);
1082
1083    /* Just reference them here */
1084    _mesa_reference_buffer_object(ctx, &dest->ElementArrayBufferObj,
1085                                  src->ElementArrayBufferObj);
1086 }
1087
1088 /**
1089  * Restore the content of src to dest.
1090  */
1091 static void
1092 restore_array_attrib(struct gl_context *ctx,
1093                      struct gl_array_attrib *dest,
1094                      struct gl_array_attrib *src)
1095 {
1096     copy_array_attrib(ctx, dest, src);
1097
1098    if (src->ElementArrayBufferObj->Name == 0
1099        || _mesa_IsBufferARB(src->ElementArrayBufferObj->Name))
1100       _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1101                           src->ElementArrayBufferObj->Name);
1102
1103    /* Better safe than sorry?! */
1104    dest->RebindArrays = GL_TRUE;
1105
1106    /* FIXME: Should some bits in ctx->Array->NewState also be set
1107     * FIXME: here?  It seems like it should be set to inclusive-or
1108     * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1109     * ... just do it.
1110     */
1111    dest->NewState |= src->_Enabled | dest->_Enabled;
1112 }
1113
1114
1115 void GLAPIENTRY
1116 _mesa_PushClientAttrib(GLbitfield mask)
1117 {
1118    struct gl_attrib_node *head;
1119
1120    GET_CURRENT_CONTEXT(ctx);
1121    ASSERT_OUTSIDE_BEGIN_END(ctx);
1122
1123    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1124       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1125       return;
1126    }
1127
1128    /* Build linked list of attribute nodes which save all attribute
1129     * groups specified by the mask.
1130     */
1131    head = NULL;
1132
1133    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1134       struct gl_pixelstore_attrib *attr;
1135       /* packing attribs */
1136       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1137       copy_pixelstore(ctx, attr, &ctx->Pack);
1138       save_attrib_data(&head, GL_CLIENT_PACK_BIT, attr);
1139       /* unpacking attribs */
1140       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1141       copy_pixelstore(ctx, attr, &ctx->Unpack);
1142       save_attrib_data(&head, GL_CLIENT_UNPACK_BIT, attr);
1143    }
1144
1145    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1146       struct gl_array_attrib *attr;
1147       attr = CALLOC_STRUCT( gl_array_attrib );
1148       _mesa_init_varray(ctx, attr);
1149       save_array_attrib(ctx, attr, &ctx->Array);
1150       save_attrib_data(&head, GL_CLIENT_VERTEX_ARRAY_BIT, attr);
1151    }
1152
1153    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1154    ctx->ClientAttribStackDepth++;
1155 }
1156
1157
1158
1159
1160 void GLAPIENTRY
1161 _mesa_PopClientAttrib(void)
1162 {
1163    struct gl_attrib_node *node, *next;
1164
1165    GET_CURRENT_CONTEXT(ctx);
1166    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1167
1168    if (ctx->ClientAttribStackDepth == 0) {
1169       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1170       return;
1171    }
1172
1173    ctx->ClientAttribStackDepth--;
1174    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1175
1176    while (node) {
1177       switch (node->kind) {
1178          case GL_CLIENT_PACK_BIT:
1179             {
1180                struct gl_pixelstore_attrib *store =
1181                   (struct gl_pixelstore_attrib *) node->data;
1182                copy_pixelstore(ctx, &ctx->Pack, store);
1183             }
1184             ctx->NewState |= _NEW_PACKUNPACK;
1185             break;
1186          case GL_CLIENT_UNPACK_BIT:
1187             {
1188                struct gl_pixelstore_attrib *store =
1189                   (struct gl_pixelstore_attrib *) node->data;
1190                copy_pixelstore(ctx, &ctx->Unpack, store);
1191             }
1192             ctx->NewState |= _NEW_PACKUNPACK;
1193             break;
1194          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1195             struct gl_array_attrib * attr =
1196               (struct gl_array_attrib *) node->data;
1197             restore_array_attrib(ctx, &ctx->Array, attr);
1198             _mesa_free_varray_data(ctx, attr);
1199             ctx->NewState |= _NEW_ARRAY;
1200             break;
1201          }
1202          default:
1203             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1204             break;
1205       }
1206
1207       next = node->next;
1208       FREE( node->data );
1209       FREE( node );
1210       node = next;
1211    }
1212 }
1213
1214
1215 void
1216 _mesa_init_attrib_dispatch(struct _glapi_table *disp)
1217 {
1218    SET_PopAttrib(disp, _mesa_PopAttrib);
1219    SET_PushAttrib(disp, _mesa_PushAttrib);
1220    SET_PopClientAttrib(disp, _mesa_PopClientAttrib);
1221    SET_PushClientAttrib(disp, _mesa_PushClientAttrib);
1222 }
1223
1224
1225 #endif /* FEATURE_attrib_stack */
1226
1227
1228 /**
1229  * Free any attribute state data that might be attached to the context.
1230  */
1231 void
1232 _mesa_free_attrib_data(struct gl_context *ctx)
1233 {
1234    while (ctx->AttribStackDepth > 0) {
1235       struct gl_attrib_node *attr, *next;
1236
1237       ctx->AttribStackDepth--;
1238       attr = ctx->AttribStack[ctx->AttribStackDepth];
1239
1240       while (attr) {
1241          if (attr->kind == GL_TEXTURE_BIT) {
1242             struct texture_state *texstate = (struct texture_state*)attr->data;
1243             GLuint tgt;
1244             /* clear references to the saved texture objects */
1245             for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1246                _mesa_reference_texobj(&texstate->SavedTexRef[tgt], NULL);
1247             }
1248             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1249          }
1250          else {
1251             /* any other chunks of state that requires special handling? */
1252          }
1253
1254          next = attr->next;
1255          free(attr->data);
1256          free(attr);
1257          attr = next;
1258       }
1259    }
1260 }
1261
1262
1263 void _mesa_init_attrib( struct gl_context *ctx )
1264 {
1265    /* Renderer and client attribute stacks */
1266    ctx->AttribStackDepth = 0;
1267    ctx->ClientAttribStackDepth = 0;
1268 }