src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.   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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include "glheader.h"
  27
  28 #include "accum.h"
  29 #include "arrayobj.h"
  30 #include "attrib.h"
  31 #include "blend.h"
  32 #include "buffers.h"
  33 #include "bufferobj.h"
  34 #include "clear.h"
  35 #include "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 "macros.h"
  44 #include "matrix.h"
  45 #include "multisample.h"
  46 #include "pixelstore.h"
  47 #include "points.h"
  48 #include "polygon.h"
  49 #include "shared.h"
  50 #include "scissor.h"
  51 #include "stencil.h"
  52 #include "texenv.h"
  53 #include "texgen.h"
  54 #include "texobj.h"
  55 #include "texparam.h"
  56 #include "texstate.h"
  57 #include "varray.h"
  58 #include "viewport.h"
  59 #include "mtypes.h"
  60 #include "state.h"
  61 #include "hash.h"
  62 #include <stdbool.h>
  63 #include "util/u_memory.h"
  64
  65
  66 /**
  67  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
  68  */
  69 struct gl_enable_attrib
  70 {
  71    GLboolean AlphaTest;
  72    GLboolean AutoNormal;
  73    GLboolean Blend;
  74    GLbitfield ClipPlanes;
  75    GLboolean ColorMaterial;
  76    GLboolean CullFace;
  77    GLboolean DepthClampNear;
  78    GLboolean DepthClampFar;
  79    GLboolean DepthTest;
  80    GLboolean Dither;
  81    GLboolean Fog;
  82    GLboolean Light[MAX_LIGHTS];
  83    GLboolean Lighting;
  84    GLboolean LineSmooth;
  85    GLboolean LineStipple;
  86    GLboolean IndexLogicOp;
  87    GLboolean ColorLogicOp;
  88
  89    GLboolean Map1Color4;
  90    GLboolean Map1Index;
  91    GLboolean Map1Normal;
  92    GLboolean Map1TextureCoord1;
  93    GLboolean Map1TextureCoord2;
  94    GLboolean Map1TextureCoord3;
  95    GLboolean Map1TextureCoord4;
  96    GLboolean Map1Vertex3;
  97    GLboolean Map1Vertex4;
  98    GLboolean Map2Color4;
  99    GLboolean Map2Index;
 100    GLboolean Map2Normal;
 101    GLboolean Map2TextureCoord1;
 102    GLboolean Map2TextureCoord2;
 103    GLboolean Map2TextureCoord3;
 104    GLboolean Map2TextureCoord4;
 105    GLboolean Map2Vertex3;
 106    GLboolean Map2Vertex4;
 107
 108    GLboolean Normalize;
 109    GLboolean PixelTexture;
 110    GLboolean PointSmooth;
 111    GLboolean PolygonOffsetPoint;
 112    GLboolean PolygonOffsetLine;
 113    GLboolean PolygonOffsetFill;
 114    GLboolean PolygonSmooth;
 115    GLboolean PolygonStipple;
 116    GLboolean RescaleNormals;
 117    GLbitfield Scissor;
 118    GLboolean Stencil;
 119    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 120    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 121    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 122    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 123    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 124    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 125
 126    GLbitfield Texture[MAX_TEXTURE_UNITS];
 127    GLbitfield TexGen[MAX_TEXTURE_UNITS];
 128
 129    /* GL_ARB_vertex_program */
 130    GLboolean VertexProgram;
 131    GLboolean VertexProgramPointSize;
 132    GLboolean VertexProgramTwoSide;
 133
 134    /* GL_ARB_fragment_program */
 135    GLboolean FragmentProgram;
 136
 137    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 138    GLboolean PointSprite;
 139    GLboolean FragmentShaderATI;
 140
 141    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 142    GLboolean sRGBEnabled;
 143
 144    /* GL_NV_conservative_raster */
 145    GLboolean ConservativeRasterization;
 146 };
 147
 148
 149 /**
 150  * Node for the attribute stack.
 151  */
 152 struct gl_attrib_node
 153 {
 154    GLbitfield kind;
 155    void *data;
 156    struct gl_attrib_node *next;
 157 };
 158
 159
 160
 161 /**
 162  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
 163  */
 164 struct texture_state
 165 {
 166    struct gl_texture_attrib Texture;  /**< The usual context state */
 167
 168    /** to save per texture object state (wrap modes, filters, etc): */
 169    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 170
 171    /**
 172     * To save references to texture objects (so they don't get accidentally
 173     * deleted while saved in the attribute stack).
 174     */
 175    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
 176
 177    /* We need to keep a reference to the shared state.  That's where the
 178     * default texture objects are kept.  We don't want that state to be
 179     * freed while the attribute stack contains pointers to any default
 180     * texture objects.
 181     */
 182    struct gl_shared_state *SharedRef;
 183 };
 184
 185
 186 struct viewport_state
 187 {
 188    struct gl_viewport_attrib ViewportArray[MAX_VIEWPORTS];
 189    GLuint SubpixelPrecisionBias[2];
 190 };
 191
 192
 193 /** An unused GL_*_BIT value */
 194 #define DUMMY_BIT 0x10000000
 195
 196
 197 /**
 198  * Allocate new attribute node of given type/kind.  Attach payload data.
 199  * Insert it into the linked list named by 'head'.
 200  */
 201 static bool
 202 save_attrib_data(struct gl_attrib_node **head,
 203                  GLbitfield kind, void *payload)
 204 {
 205    struct gl_attrib_node *n = MALLOC_STRUCT(gl_attrib_node);
 206    if (n) {
 207       n->kind = kind;
 208       n->data = payload;
 209       /* insert at head */
 210       n->next = *head;
 211       *head = n;
 212    }
 213    else {
 214       /* out of memory! */
 215       return false;
 216    }
 217    return true;
 218 }
 219
 220
 221 /**
 222  * Helper function for_mesa_PushAttrib for simple attributes.
 223  * Allocates memory for attribute data and copies the given attribute data.
 224  * \param head  head of linked list to insert attribute data into
 225  * \param attr_bit  one of the GL_<attrib>_BIT flags
 226  * \param attr_size  number of bytes to allocate for attribute data
 227  * \param attr_data  the attribute data to copy
 228  * \return true for success, false for out of memory
 229  */
 230 static bool
 231 push_attrib(struct gl_context *ctx, struct gl_attrib_node **head,
 232             GLbitfield attr_bit, GLuint attr_size, const void *attr_data)
 233 {
 234    void *attribute;
 235
 236    attribute = malloc(attr_size);
 237    if (attribute == NULL) {
 238       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 239       return false;
 240    }
 241
 242    if (save_attrib_data(head, attr_bit, attribute)) {
 243       memcpy(attribute, attr_data, attr_size);
 244    }
 245    else {
 246       free(attribute);
 247       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 248       return false;
 249    }
 250    return true;
 251 }
 252
 253
 254 void GLAPIENTRY
 255 _mesa_PushAttrib(GLbitfield mask)
 256 {
 257    struct gl_attrib_node *head;
 258
 259    GET_CURRENT_CONTEXT(ctx);
 260
 261    if (MESA_VERBOSE & VERBOSE_API)
 262       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 263
 264    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 265       _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushAttrib");
 266       return;
 267    }
 268
 269    /* Build linked list of attribute nodes which save all attribute */
 270    /* groups specified by the mask. */
 271    head = NULL;
 272
 273    if (mask == 0) {
 274       /* if mask is zero we still need to push something so that we
 275        * don't get a GL_STACK_UNDERFLOW error in glPopAttrib().
 276        */
 277       GLuint dummy = 0;
 278       if (!push_attrib(ctx, &head, DUMMY_BIT, sizeof(dummy), &dummy))
 279          goto end;
 280    }
 281
 282    if (mask & GL_ACCUM_BUFFER_BIT) {
 283       if (!push_attrib(ctx, &head, GL_ACCUM_BUFFER_BIT,
 284                        sizeof(struct gl_accum_attrib),
 285                        (void*)&ctx->Accum))
 286          goto end;
 287    }
 288
 289    if (mask & GL_COLOR_BUFFER_BIT) {
 290       GLuint i;
 291       struct gl_colorbuffer_attrib *attr;
 292       attr = MALLOC_STRUCT(gl_colorbuffer_attrib);
 293       if (attr == NULL) {
 294          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 295          goto end;
 296       }
 297
 298     if (save_attrib_data(&head, GL_COLOR_BUFFER_BIT, attr)) {
 299          memcpy(attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib));
 300          /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 301          for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 302             attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 303       }
 304       else {
 305          free(attr);
 306          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 307          goto end;
 308       }
 309    }
 310
 311    if (mask & GL_CURRENT_BIT) {
 312       FLUSH_CURRENT(ctx, 0);
 313       if (!push_attrib(ctx, &head, GL_CURRENT_BIT,
 314                        sizeof(struct gl_current_attrib),
 315                        (void*)&ctx->Current))
 316          goto end;
 317    }
 318
 319    if (mask & GL_DEPTH_BUFFER_BIT) {
 320       if (!push_attrib(ctx, &head, GL_DEPTH_BUFFER_BIT,
 321                        sizeof(struct gl_depthbuffer_attrib),
 322                        (void*)&ctx->Depth))
 323          goto end;
 324    }
 325
 326    if (mask & GL_ENABLE_BIT) {
 327       struct gl_enable_attrib *attr;
 328       GLuint i;
 329       attr = MALLOC_STRUCT(gl_enable_attrib);
 330       if (attr == NULL) {
 331          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 332          goto end;
 333       }
 334
 335       /* Copy enable flags from all other attributes into the enable struct. */
 336       attr->AlphaTest = ctx->Color.AlphaEnabled;
 337       attr->AutoNormal = ctx->Eval.AutoNormal;
 338       attr->Blend = ctx->Color.BlendEnabled;
 339       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 340       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 341       attr->CullFace = ctx->Polygon.CullFlag;
 342       attr->DepthClampNear = ctx->Transform.DepthClampNear;
 343       attr->DepthClampFar = ctx->Transform.DepthClampFar;
 344       attr->DepthTest = ctx->Depth.Test;
 345       attr->Dither = ctx->Color.DitherFlag;
 346       attr->Fog = ctx->Fog.Enabled;
 347       for (i = 0; i < ctx->Const.MaxLights; i++) {
 348          attr->Light[i] = ctx->Light.Light[i].Enabled;
 349       }
 350       attr->Lighting = ctx->Light.Enabled;
 351       attr->LineSmooth = ctx->Line.SmoothFlag;
 352       attr->LineStipple = ctx->Line.StippleFlag;
 353       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 354       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 355       attr->Map1Color4 = ctx->Eval.Map1Color4;
 356       attr->Map1Index = ctx->Eval.Map1Index;
 357       attr->Map1Normal = ctx->Eval.Map1Normal;
 358       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 359       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 360       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 361       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 362       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 363       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 364       attr->Map2Color4 = ctx->Eval.Map2Color4;
 365       attr->Map2Index = ctx->Eval.Map2Index;
 366       attr->Map2Normal = ctx->Eval.Map2Normal;
 367       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 368       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 369       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 370       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 371       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 372       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 373       attr->Normalize = ctx->Transform.Normalize;
 374       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 375       attr->PointSmooth = ctx->Point.SmoothFlag;
 376       attr->PointSprite = ctx->Point.PointSprite;
 377       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 378       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 379       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 380       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 381       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 382       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 383       attr->Scissor = ctx->Scissor.EnableFlags;
 384       attr->Stencil = ctx->Stencil.Enabled;
 385       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 386       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 387       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 388       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 389       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 390       for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 391          attr->Texture[i] = ctx->Texture.FixedFuncUnit[i].Enabled;
 392          attr->TexGen[i] = ctx->Texture.FixedFuncUnit[i].TexGenEnabled;
 393       }
 394       /* GL_ARB_vertex_program */
 395       attr->VertexProgram = ctx->VertexProgram.Enabled;
 396       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 397       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 398
 399       /* GL_ARB_fragment_program */
 400       attr->FragmentProgram = ctx->FragmentProgram.Enabled;
 401
 402       if (!save_attrib_data(&head, GL_ENABLE_BIT, attr)) {
 403          free(attr);
 404          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 405          goto end;
 406       }
 407
 408       /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 409       attr->sRGBEnabled = ctx->Color.sRGBEnabled;
 410
 411       /* GL_NV_conservative_raster */
 412       attr->ConservativeRasterization = ctx->ConservativeRasterization;
 413    }
 414
 415    if (mask & GL_EVAL_BIT) {
 416       if (!push_attrib(ctx, &head, GL_EVAL_BIT,
 417                        sizeof(struct gl_eval_attrib),
 418                        (void*)&ctx->Eval))
 419          goto end;
 420    }
 421
 422    if (mask & GL_FOG_BIT) {
 423       if (!push_attrib(ctx, &head, GL_FOG_BIT,
 424                        sizeof(struct gl_fog_attrib),
 425                        (void*)&ctx->Fog))
 426          goto end;
 427    }
 428
 429    if (mask & GL_HINT_BIT) {
 430       if (!push_attrib(ctx, &head, GL_HINT_BIT,
 431                        sizeof(struct gl_hint_attrib),
 432                        (void*)&ctx->Hint))
 433          goto end;
 434    }
 435
 436    if (mask & GL_LIGHTING_BIT) {
 437       FLUSH_CURRENT(ctx, 0);   /* flush material changes */
 438       if (!push_attrib(ctx, &head, GL_LIGHTING_BIT,
 439                        sizeof(struct gl_light_attrib),
 440                        (void*)&ctx->Light))
 441          goto end;
 442    }
 443
 444    if (mask & GL_LINE_BIT) {
 445       if (!push_attrib(ctx, &head, GL_LINE_BIT,
 446                        sizeof(struct gl_line_attrib),
 447                        (void*)&ctx->Line))
 448          goto end;
 449    }
 450
 451    if (mask & GL_LIST_BIT) {
 452       if (!push_attrib(ctx, &head, GL_LIST_BIT,
 453                        sizeof(struct gl_list_attrib),
 454                        (void*)&ctx->List))
 455          goto end;
 456    }
 457
 458    if (mask & GL_PIXEL_MODE_BIT) {
 459       struct gl_pixel_attrib *attr;
 460       attr = MALLOC_STRUCT(gl_pixel_attrib);
 461       if (attr == NULL) {
 462          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 463          goto end;
 464       }
 465
 466       if (save_attrib_data(&head, GL_PIXEL_MODE_BIT, attr)) {
 467          memcpy(attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib));
 468          /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 469          attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 470       }
 471       else {
 472          free(attr);
 473          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib");
 474          goto end;
 475       }
 476    }
 477
 478    if (mask & GL_POINT_BIT) {
 479       if (!push_attrib(ctx, &head, GL_POINT_BIT,
 480                        sizeof(struct gl_point_attrib),
 481                        (void*)&ctx->Point))
 482          goto end;
 483    }
 484
 485    if (mask & GL_POLYGON_BIT) {
 486       if (!push_attrib(ctx, &head, GL_POLYGON_BIT,
 487                        sizeof(struct gl_polygon_attrib),
 488                        (void*)&ctx->Polygon))
 489          goto end;
 490    }
 491
 492    if (mask & GL_POLYGON_STIPPLE_BIT) {
 493       if (!push_attrib(ctx, &head, GL_POLYGON_STIPPLE_BIT,
 494                        sizeof(ctx->PolygonStipple),
 495                        (void*)&ctx->PolygonStipple))
 496          goto end;
 497    }
 498
 499    if (mask & GL_SCISSOR_BIT) {
 500       if (!push_attrib(ctx, &head, GL_SCISSOR_BIT,
 501                        sizeof(struct gl_scissor_attrib),
 502                        (void*)&ctx->Scissor))
 503          goto end;
 504    }
 505
 506    if (mask & GL_STENCIL_BUFFER_BIT) {
 507       if (!push_attrib(ctx, &head, GL_STENCIL_BUFFER_BIT,
 508                        sizeof(struct gl_stencil_attrib),
 509                        (void*)&ctx->Stencil))
 510          goto end;
 511    }
 512
 513    if (mask & GL_TEXTURE_BIT) {
 514       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 515       GLuint u, tex;
 516
 517       if (!texstate) {
 518          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 519          goto end;
 520       }
 521
 522       if (!save_attrib_data(&head, GL_TEXTURE_BIT, texstate)) {
 523          free(texstate);
 524          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 525          goto end;
 526       }
 527
 528       _mesa_lock_context_textures(ctx);
 529
 530       /* copy/save the bulk of texture state here */
 531       memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 532
 533       /* Save references to the currently bound texture objects so they don't
 534        * accidentally get deleted while referenced in the attribute stack.
 535        */
 536       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 537          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 538             _mesa_reference_texobj(&texstate->SavedTexRef[u][tex],
 539                                    ctx->Texture.Unit[u].CurrentTex[tex]);
 540          }
 541       }
 542
 543       /* copy state/contents of the currently bound texture objects */
 544       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 545          for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
 546             _mesa_copy_texture_object(&texstate->SavedObj[u][tex],
 547                                       ctx->Texture.Unit[u].CurrentTex[tex]);
 548          }
 549       }
 550
 551       _mesa_reference_shared_state(ctx, &texstate->SharedRef, ctx->Shared);
 552
 553       _mesa_unlock_context_textures(ctx);
 554    }
 555
 556    if (mask & GL_TRANSFORM_BIT) {
 557       if (!push_attrib(ctx, &head, GL_TRANSFORM_BIT,
 558                        sizeof(struct gl_transform_attrib),
 559                        (void*)&ctx->Transform))
 560          goto end;
 561    }
 562
 563    if (mask & GL_VIEWPORT_BIT) {
 564       struct viewport_state *viewstate = CALLOC_STRUCT(viewport_state);
 565       if (!viewstate) {
 566          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_VIEWPORT_BIT)");
 567          goto end;
 568       }
 569
 570       if (!save_attrib_data(&head, GL_VIEWPORT_BIT, viewstate)) {
 571          free(viewstate);
 572          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_VIEWPORT_BIT)");
 573          goto end;
 574       }
 575
 576       memcpy(&viewstate->ViewportArray, &ctx->ViewportArray,
 577              sizeof(struct gl_viewport_attrib)*ctx->Const.MaxViewports);
 578
 579       viewstate->SubpixelPrecisionBias[0] = ctx->SubpixelPrecisionBias[0];
 580       viewstate->SubpixelPrecisionBias[1] = ctx->SubpixelPrecisionBias[1];
 581    }
 582
 583    /* GL_ARB_multisample */
 584    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 585       if (!push_attrib(ctx, &head, GL_MULTISAMPLE_BIT_ARB,
 586                        sizeof(struct gl_multisample_attrib),
 587                        (void*)&ctx->Multisample))
 588          goto end;
 589    }
 590
 591 end:
 592    if (head != NULL) {
 593        ctx->AttribStack[ctx->AttribStackDepth] = head;
 594        ctx->AttribStackDepth++;
 595    }
 596 }
 597
 598
 599
 600 static void
 601 pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
 602 {
 603    const GLuint curTexUnitSave = ctx->Texture.CurrentUnit;
 604    GLuint i;
 605
 606 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)                \
 607         if ((VALUE) != (NEWVALUE)) {                        \
 608            _mesa_set_enable(ctx, ENUM, (NEWVALUE));        \
 609         }
 610
 611    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 612    if (ctx->Color.BlendEnabled != enable->Blend) {
 613       if (ctx->Extensions.EXT_draw_buffers2) {
 614          GLuint i;
 615          for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 616             _mesa_set_enablei(ctx, GL_BLEND, i, (enable->Blend >> i) & 1);
 617          }
 618       }
 619       else {
 620          _mesa_set_enable(ctx, GL_BLEND, (enable->Blend & 1));
 621       }
 622    }
 623
 624    for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
 625       const GLuint mask = 1 << i;
 626       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 627           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 628                            !!(enable->ClipPlanes & mask));
 629    }
 630
 631    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 632                    GL_COLOR_MATERIAL);
 633    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 634
 635    if (!ctx->Extensions.AMD_depth_clamp_separate) {
 636       TEST_AND_UPDATE(ctx->Transform.DepthClampNear && ctx->Transform.DepthClampFar,
 637                       enable->DepthClampNear && enable->DepthClampFar,
 638                       GL_DEPTH_CLAMP);
 639    } else {
 640       TEST_AND_UPDATE(ctx->Transform.DepthClampNear, enable->DepthClampNear,
 641                       GL_DEPTH_CLAMP_NEAR_AMD);
 642       TEST_AND_UPDATE(ctx->Transform.DepthClampFar, enable->DepthClampFar,
 643                       GL_DEPTH_CLAMP_FAR_AMD);
 644    }
 645
 646    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 647    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 648    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 649    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 650    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 651    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 652                    GL_LINE_STIPPLE);
 653    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 654                    GL_INDEX_LOGIC_OP);
 655    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 656                    GL_COLOR_LOGIC_OP);
 657
 658    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 659    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 660    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 661    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 662                    GL_MAP1_TEXTURE_COORD_1);
 663    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 664                    GL_MAP1_TEXTURE_COORD_2);
 665    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 666                    GL_MAP1_TEXTURE_COORD_3);
 667    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 668                    GL_MAP1_TEXTURE_COORD_4);
 669    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 670                    GL_MAP1_VERTEX_3);
 671    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 672                    GL_MAP1_VERTEX_4);
 673
 674    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 675    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 676    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 677    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 678                    GL_MAP2_TEXTURE_COORD_1);
 679    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 680                    GL_MAP2_TEXTURE_COORD_2);
 681    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 682                    GL_MAP2_TEXTURE_COORD_3);
 683    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 684                    GL_MAP2_TEXTURE_COORD_4);
 685    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 686                    GL_MAP2_VERTEX_3);
 687    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 688                    GL_MAP2_VERTEX_4);
 689
 690    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 691    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 692    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 693                    GL_RESCALE_NORMAL_EXT);
 694    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 695                    enable->RasterPositionUnclipped,
 696                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 697    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 698                    GL_POINT_SMOOTH);
 699    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 700       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 701                       GL_POINT_SPRITE_NV);
 702    }
 703    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 704                    GL_POLYGON_OFFSET_POINT);
 705    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 706                    GL_POLYGON_OFFSET_LINE);
 707    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 708                    GL_POLYGON_OFFSET_FILL);
 709    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 710                    GL_POLYGON_SMOOTH);
 711    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 712                    GL_POLYGON_STIPPLE);
 713    if (ctx->Scissor.EnableFlags != enable->Scissor) {
 714       unsigned i;
 715
 716       for (i = 0; i < ctx->Const.MaxViewports; i++) {
 717          _mesa_set_enablei(ctx, GL_SCISSOR_TEST, i, (enable->Scissor >> i) & 1);
 718       }
 719    }
 720    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 721    if (ctx->Extensions.EXT_stencil_two_side) {
 722       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 723    }
 724    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 725                    GL_MULTISAMPLE_ARB);
 726    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 727                    enable->SampleAlphaToCoverage,
 728                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 729    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 730                    enable->SampleAlphaToOne,
 731                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 732    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 733                    enable->SampleCoverage,
 734                    GL_SAMPLE_COVERAGE_ARB);
 735    /* GL_ARB_vertex_program */
 736    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 737                    enable->VertexProgram,
 738                    GL_VERTEX_PROGRAM_ARB);
 739    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 740                    enable->VertexProgramPointSize,
 741                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 742    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 743                    enable->VertexProgramTwoSide,
 744                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 745
 746    /* GL_ARB_fragment_program */
 747    TEST_AND_UPDATE(ctx->FragmentProgram.Enabled,
 748                    enable->FragmentProgram,
 749                    GL_FRAGMENT_PROGRAM_ARB);
 750
 751    /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
 752    TEST_AND_UPDATE(ctx->Color.sRGBEnabled, enable->sRGBEnabled,
 753                    GL_FRAMEBUFFER_SRGB);
 754
 755    /* GL_NV_conservative_raster */
 756    if (ctx->Extensions.NV_conservative_raster) {
 757       TEST_AND_UPDATE(ctx->ConservativeRasterization,
 758                       enable->ConservativeRasterization,
 759                       GL_CONSERVATIVE_RASTERIZATION_NV);
 760    }
 761
 762    /* texture unit enables */
 763    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 764       const GLbitfield enabled = enable->Texture[i];
 765       const GLbitfield genEnabled = enable->TexGen[i];
 766
 767       if (ctx->Texture.FixedFuncUnit[i].Enabled != enabled) {
 768          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 769
 770          _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(enabled & TEXTURE_1D_BIT));
 771          _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(enabled & TEXTURE_2D_BIT));
 772          _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(enabled & TEXTURE_3D_BIT));
 773          if (ctx->Extensions.NV_texture_rectangle) {
 774             _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_ARB,
 775                              !!(enabled & TEXTURE_RECT_BIT));
 776          }
 777          if (ctx->Extensions.ARB_texture_cube_map) {
 778             _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 779                              !!(enabled & TEXTURE_CUBE_BIT));
 780          }
 781       }
 782
 783       if (ctx->Texture.FixedFuncUnit[i].TexGenEnabled != genEnabled) {
 784          _mesa_ActiveTexture(GL_TEXTURE0 + i);
 785          _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(genEnabled & S_BIT));
 786          _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(genEnabled & T_BIT));
 787          _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(genEnabled & R_BIT));
 788          _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(genEnabled & Q_BIT));
 789       }
 790    }
 791
 792    _mesa_ActiveTexture(GL_TEXTURE0 + curTexUnitSave);
 793 }
 794
 795
 796 /**
 797  * Pop/restore texture attribute/group state.
 798  */
 799 static void
 800 pop_texture_group(struct gl_context *ctx, struct texture_state *texstate)
 801 {
 802    GLuint u;
 803
 804    _mesa_lock_context_textures(ctx);
 805
 806    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 807       const struct gl_fixedfunc_texture_unit *unit =
 808          &texstate->Texture.FixedFuncUnit[u];
 809       GLuint tgt;
 810
 811       _mesa_ActiveTexture(GL_TEXTURE0_ARB + u);
 812       _mesa_set_enable(ctx, GL_TEXTURE_1D, !!(unit->Enabled & TEXTURE_1D_BIT));
 813       _mesa_set_enable(ctx, GL_TEXTURE_2D, !!(unit->Enabled & TEXTURE_2D_BIT));
 814       _mesa_set_enable(ctx, GL_TEXTURE_3D, !!(unit->Enabled & TEXTURE_3D_BIT));
 815       if (ctx->Extensions.ARB_texture_cube_map) {
 816          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP,
 817                           !!(unit->Enabled & TEXTURE_CUBE_BIT));
 818       }
 819       if (ctx->Extensions.NV_texture_rectangle) {
 820          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 821                           !!(unit->Enabled & TEXTURE_RECT_BIT));
 822       }
 823       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 824       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 825       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenS.Mode);
 826       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenT.Mode);
 827       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenR.Mode);
 828       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenQ.Mode);
 829       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->GenS.ObjectPlane);
 830       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->GenT.ObjectPlane);
 831       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->GenR.ObjectPlane);
 832       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->GenQ.ObjectPlane);
 833       /* Eye plane done differently to avoid re-transformation */
 834       {
 835          struct gl_fixedfunc_texture_unit *destUnit =
 836             &ctx->Texture.FixedFuncUnit[u];
 837
 838          COPY_4FV(destUnit->GenS.EyePlane, unit->GenS.EyePlane);
 839          COPY_4FV(destUnit->GenT.EyePlane, unit->GenT.EyePlane);
 840          COPY_4FV(destUnit->GenR.EyePlane, unit->GenR.EyePlane);
 841          COPY_4FV(destUnit->GenQ.EyePlane, unit->GenQ.EyePlane);
 842          if (ctx->Driver.TexGen) {
 843             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->GenS.EyePlane);
 844             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->GenT.EyePlane);
 845             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->GenR.EyePlane);
 846             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->GenQ.EyePlane);
 847          }
 848       }
 849       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S, !!(unit->TexGenEnabled & S_BIT));
 850       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T, !!(unit->TexGenEnabled & T_BIT));
 851       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R, !!(unit->TexGenEnabled & R_BIT));
 852       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, !!(unit->TexGenEnabled & Q_BIT));
 853       _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS,
 854                     texstate->Texture.Unit[u].LodBias);
 855       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 856                     unit->Combine.ModeRGB);
 857       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 858                     unit->Combine.ModeA);
 859       {
 860          const GLuint n = ctx->Extensions.NV_texture_env_combine4 ? 4 : 3;
 861          GLuint i;
 862          for (i = 0; i < n; i++) {
 863             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB + i,
 864                           unit->Combine.SourceRGB[i]);
 865             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA + i,
 866                           unit->Combine.SourceA[i]);
 867             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB + i,
 868                           unit->Combine.OperandRGB[i]);
 869             _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA + i,
 870                           unit->Combine.OperandA[i]);
 871          }
 872       }
 873       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 874                     1 << unit->Combine.ScaleShiftRGB);
 875       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 876                     1 << unit->Combine.ScaleShiftA);
 877
 878       /* Restore texture object state for each target */
 879       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 880          const struct gl_texture_object *obj = NULL;
 881          const struct gl_sampler_object *samp;
 882          GLenum target;
 883
 884          obj = &texstate->SavedObj[u][tgt];
 885
 886          /* don't restore state for unsupported targets to prevent
 887           * raising GL errors.
 888           */
 889          if (obj->Target == GL_TEXTURE_CUBE_MAP &&
 890              !ctx->Extensions.ARB_texture_cube_map) {
 891             continue;
 892          }
 893          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 894                   !ctx->Extensions.NV_texture_rectangle) {
 895             continue;
 896          }
 897          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 898                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 899                   !ctx->Extensions.EXT_texture_array) {
 900             continue;
 901          }
 902          else if (obj->Target == GL_TEXTURE_CUBE_MAP_ARRAY &&
 903              !ctx->Extensions.ARB_texture_cube_map_array) {
 904             continue;
 905          } else if (obj->Target == GL_TEXTURE_BUFFER)
 906             continue;
 907          else if (obj->Target == GL_TEXTURE_EXTERNAL_OES)
 908             continue;
 909          else if (obj->Target == GL_TEXTURE_2D_MULTISAMPLE ||
 910                   obj->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY)
 911             continue;
 912
 913          target = obj->Target;
 914
 915          _mesa_BindTexture(target, obj->Name);
 916
 917          samp = &obj->Sampler;
 918
 919          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, samp->BorderColor.f);
 920          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, samp->WrapS);
 921          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, samp->WrapT);
 922          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, samp->WrapR);
 923          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, samp->MinFilter);
 924          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, samp->MagFilter);
 925          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, samp->MinLod);
 926          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, samp->MaxLod);
 927          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, samp->LodBias);
 928          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 929          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 930          if (target != GL_TEXTURE_RECTANGLE_ARB)
 931             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 932          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 933             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 934                                 samp->MaxAnisotropy);
 935          }
 936          if (ctx->Extensions.ARB_shadow) {
 937             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_MODE,
 938                                 samp->CompareMode);
 939             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_FUNC,
 940                                 samp->CompareFunc);
 941          }
 942          if (ctx->Extensions.ARB_depth_texture)
 943             _mesa_TexParameteri(target, GL_DEPTH_TEXTURE_MODE, obj->DepthMode);
 944       }
 945
 946       /* remove saved references to the texture objects */
 947       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 948          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 949       }
 950    }
 951
 952    _mesa_ActiveTexture(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 953
 954    _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
 955
 956    _mesa_unlock_context_textures(ctx);
 957 }
 958
 959
 960 /*
 961  * This function is kind of long just because we have to call a lot
 962  * of device driver functions to update device driver state.
 963  *
 964  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 965  * in order to restore GL state.  This isn't terribly efficient but it
 966  * ensures that dirty flags and any derived state gets updated correctly.
 967  * We could at least check if the value to restore equals the current value
 968  * and then skip the Mesa call.
 969  */
 970 void GLAPIENTRY
 971 _mesa_PopAttrib(void)
 972 {
 973    struct gl_attrib_node *attr, *next;
 974    GET_CURRENT_CONTEXT(ctx);
 975    FLUSH_VERTICES(ctx, 0);
 976
 977    if (ctx->AttribStackDepth == 0) {
 978       _mesa_error(ctx, GL_STACK_UNDERFLOW, "glPopAttrib");
 979       return;
 980    }
 981
 982    ctx->AttribStackDepth--;
 983    attr = ctx->AttribStack[ctx->AttribStackDepth];
 984
 985    while (attr) {
 986
 987       if (MESA_VERBOSE & VERBOSE_API) {
 988          _mesa_debug(ctx, "glPopAttrib %s\n",
 989                      _mesa_enum_to_string(attr->kind));
 990       }
 991
 992       switch (attr->kind) {
 993          case DUMMY_BIT:
 994             /* do nothing */
 995             break;
 996
 997          case GL_ACCUM_BUFFER_BIT:
 998             {
 999                const struct gl_accum_attrib *accum;
1000                accum = (const struct gl_accum_attrib *) attr->data;
1001                _mesa_ClearAccum(accum->ClearColor[0],
1002                                 accum->ClearColor[1],
1003                                 accum->ClearColor[2],
1004                                 accum->ClearColor[3]);
1005             }
1006             break;
1007          case GL_COLOR_BUFFER_BIT:
1008             {
1009                const struct gl_colorbuffer_attrib *color;
1010
1011                color = (const struct gl_colorbuffer_attrib *) attr->data;
1012                _mesa_ClearIndex((GLfloat) color->ClearIndex);
1013                _mesa_ClearColor(color->ClearColor.f[0],
1014                                 color->ClearColor.f[1],
1015                                 color->ClearColor.f[2],
1016                                 color->ClearColor.f[3]);
1017                _mesa_IndexMask(color->IndexMask);
1018                if (!ctx->Extensions.EXT_draw_buffers2) {
1019                   _mesa_ColorMask(GET_COLORMASK_BIT(color->ColorMask, 0, 0),
1020                                   GET_COLORMASK_BIT(color->ColorMask, 0, 1),
1021                                   GET_COLORMASK_BIT(color->ColorMask, 0, 2),
1022                                   GET_COLORMASK_BIT(color->ColorMask, 0, 3));
1023                }
1024                else {
1025                   GLuint i;
1026                   for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
1027                      _mesa_ColorMaski(i,
1028                                       GET_COLORMASK_BIT(color->ColorMask, i, 0),
1029                                       GET_COLORMASK_BIT(color->ColorMask, i, 1),
1030                                       GET_COLORMASK_BIT(color->ColorMask, i, 2),
1031                                       GET_COLORMASK_BIT(color->ColorMask, i, 3));
1032                   }
1033                }
1034                {
1035                   /* Need to determine if more than one color output is
1036                    * specified.  If so, call glDrawBuffersARB, else call
1037                    * glDrawBuffer().  This is a subtle, but essential point
1038                    * since GL_FRONT (for example) is illegal for the former
1039                    * function, but legal for the later.
1040                    */
1041                   GLboolean multipleBuffers = GL_FALSE;
1042                   GLuint i;
1043
1044                   for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
1045                      if (color->DrawBuffer[i] != GL_NONE) {
1046                         multipleBuffers = GL_TRUE;
1047                         break;
1048                      }
1049                   }
1050                   /* Call the API_level functions, not _mesa_drawbuffers()
1051                    * since we need to do error checking on the pop'd
1052                    * GL_DRAW_BUFFER.
1053                    * Ex: if GL_FRONT were pushed, but we're popping with a
1054                    * user FBO bound, GL_FRONT will be illegal and we'll need
1055                    * to record that error.  Per OpenGL ARB decision.
1056                    */
1057                   if (multipleBuffers) {
1058                      GLenum buffers[MAX_DRAW_BUFFERS];
1059
1060                      for (unsigned i = 0; i < ctx->Const.MaxDrawBuffers; i++)
1061                         buffers[i] = color->DrawBuffer[i];
1062
1063                      _mesa_DrawBuffers(ctx->Const.MaxDrawBuffers, buffers);
1064                   } else {
1065                      _mesa_DrawBuffer(color->DrawBuffer[0]);
1066                   }
1067                }
1068                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
1069                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
1070                if (ctx->Color.BlendEnabled != color->BlendEnabled) {
1071                   if (ctx->Extensions.EXT_draw_buffers2) {
1072                      GLuint i;
1073                      for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
1074                         _mesa_set_enablei(ctx, GL_BLEND, i,
1075                                           (color->BlendEnabled >> i) & 1);
1076                      }
1077                   }
1078                   else {
1079                      _mesa_set_enable(ctx, GL_BLEND, (color->BlendEnabled & 1));
1080                   }
1081                }
1082                if (ctx->Color._BlendFuncPerBuffer ||
1083                    ctx->Color._BlendEquationPerBuffer) {
1084                   /* set blend per buffer */
1085                   GLuint buf;
1086                   for (buf = 0; buf < ctx->Const.MaxDrawBuffers; buf++) {
1087                      _mesa_BlendFuncSeparateiARB(buf, color->Blend[buf].SrcRGB,
1088                                               color->Blend[buf].DstRGB,
1089                                               color->Blend[buf].SrcA,
1090                                               color->Blend[buf].DstA);
1091                      _mesa_BlendEquationSeparateiARB(buf,
1092                                                   color->Blend[buf].EquationRGB,
1093                                                   color->Blend[buf].EquationA);
1094                   }
1095                }
1096                else {
1097                   /* set same blend modes for all buffers */
1098                   _mesa_BlendFuncSeparate(color->Blend[0].SrcRGB,
1099                                              color->Blend[0].DstRGB,
1100                                              color->Blend[0].SrcA,
1101                                              color->Blend[0].DstA);
1102                   /* This special case is because glBlendEquationSeparateEXT
1103                    * cannot take GL_LOGIC_OP as a parameter.
1104                    */
1105                   if (color->Blend[0].EquationRGB ==
1106                       color->Blend[0].EquationA) {
1107                      _mesa_BlendEquation(color->Blend[0].EquationRGB);
1108                   }
1109                   else {
1110                      _mesa_BlendEquationSeparate(
1111                                                  color->Blend[0].EquationRGB,
1112                                                  color->Blend[0].EquationA);
1113                   }
1114                }
1115                _mesa_BlendColor(color->BlendColorUnclamped[0],
1116                                 color->BlendColorUnclamped[1],
1117                                 color->BlendColorUnclamped[2],
1118                                 color->BlendColorUnclamped[3]);
1119                _mesa_LogicOp(color->LogicOp);
1120                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
1121                                 color->ColorLogicOpEnabled);
1122                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
1123                                 color->IndexLogicOpEnabled);
1124                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
1125                if (ctx->Extensions.ARB_color_buffer_float)
1126                   _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR_ARB,
1127                                    color->ClampFragmentColor);
1128                if (ctx->Extensions.ARB_color_buffer_float || ctx->Version >= 30)
1129                   _mesa_ClampColor(GL_CLAMP_READ_COLOR_ARB, color->ClampReadColor);
1130
1131                /* GL_ARB_framebuffer_sRGB / GL_EXT_framebuffer_sRGB */
1132                if (ctx->Extensions.EXT_framebuffer_sRGB)
1133                   _mesa_set_enable(ctx, GL_FRAMEBUFFER_SRGB, color->sRGBEnabled);
1134             }
1135             break;
1136          case GL_CURRENT_BIT:
1137             FLUSH_CURRENT(ctx, 0);
1138             memcpy(&ctx->Current, attr->data,
1139                     sizeof(struct gl_current_attrib));
1140             break;
1141          case GL_DEPTH_BUFFER_BIT:
1142             {
1143                const struct gl_depthbuffer_attrib *depth;
1144                depth = (const struct gl_depthbuffer_attrib *) attr->data;
1145                _mesa_DepthFunc(depth->Func);
1146                _mesa_ClearDepth(depth->Clear);
1147                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
1148                _mesa_DepthMask(depth->Mask);
1149                if (ctx->Extensions.EXT_depth_bounds_test) {
1150                   _mesa_set_enable(ctx, GL_DEPTH_BOUNDS_TEST_EXT,
1151                                    depth->BoundsTest);
1152                   _mesa_DepthBoundsEXT(depth->BoundsMin, depth->BoundsMax);
1153                }
1154             }
1155             break;
1156          case GL_ENABLE_BIT:
1157             {
1158                const struct gl_enable_attrib *enable;
1159                enable = (const struct gl_enable_attrib *) attr->data;
1160                pop_enable_group(ctx, enable);
1161                ctx->NewState |= _NEW_ALL;
1162                ctx->NewDriverState |= ctx->DriverFlags.NewAlphaTest |
1163                                       ctx->DriverFlags.NewBlend |
1164                                       ctx->DriverFlags.NewClipPlaneEnable |
1165                                       ctx->DriverFlags.NewDepth |
1166                                       ctx->DriverFlags.NewDepthClamp |
1167                                       ctx->DriverFlags.NewFramebufferSRGB |
1168                                       ctx->DriverFlags.NewLineState |
1169                                       ctx->DriverFlags.NewLogicOp |
1170                                       ctx->DriverFlags.NewMultisampleEnable |
1171                                       ctx->DriverFlags.NewPolygonState |
1172                                       ctx->DriverFlags.NewSampleAlphaToXEnable |
1173                                       ctx->DriverFlags.NewSampleMask |
1174                                       ctx->DriverFlags.NewScissorTest |
1175                                       ctx->DriverFlags.NewStencil |
1176                                       ctx->DriverFlags.NewNvConservativeRasterization;
1177             }
1178             break;
1179          case GL_EVAL_BIT:
1180             memcpy(&ctx->Eval, attr->data, sizeof(struct gl_eval_attrib));
1181             vbo_exec_update_eval_maps(ctx);
1182             break;
1183          case GL_FOG_BIT:
1184             {
1185                const struct gl_fog_attrib *fog;
1186                fog = (const struct gl_fog_attrib *) attr->data;
1187                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
1188                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
1189                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
1190                _mesa_Fogf(GL_FOG_START, fog->Start);
1191                _mesa_Fogf(GL_FOG_END, fog->End);
1192                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
1193                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
1194             }
1195             break;
1196          case GL_HINT_BIT:
1197             {
1198                const struct gl_hint_attrib *hint;
1199                hint = (const struct gl_hint_attrib *) attr->data;
1200                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1201                           hint->PerspectiveCorrection);
1202                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1203                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1204                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1205                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1206                _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1207                           hint->TextureCompression);
1208             }
1209             break;
1210          case GL_LIGHTING_BIT:
1211             {
1212                GLuint i;
1213                const struct gl_light_attrib *light;
1214                light = (const struct gl_light_attrib *) attr->data;
1215                /* lighting enable */
1216                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1217                /* per-light state */
1218                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1219                   _math_matrix_analyse(ctx->ModelviewMatrixStack.Top);
1220
1221                for (i = 0; i < ctx->Const.MaxLights; i++) {
1222                   const struct gl_light *l = &light->Light[i];
1223                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1224                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1225                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1226                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular);
1227                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1228                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->SpotDirection);
1229                   {
1230                      GLfloat p[4] = { 0 };
1231                      p[0] = l->SpotExponent;
1232                      _mesa_light(ctx, i, GL_SPOT_EXPONENT, p);
1233                   }
1234                   {
1235                      GLfloat p[4] = { 0 };
1236                      p[0] = l->SpotCutoff;
1237                      _mesa_light(ctx, i, GL_SPOT_CUTOFF, p);
1238                   }
1239                   {
1240                      GLfloat p[4] = { 0 };
1241                      p[0] = l->ConstantAttenuation;
1242                      _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION, p);
1243                   }
1244                   {
1245                      GLfloat p[4] = { 0 };
1246                      p[0] = l->LinearAttenuation;
1247                      _mesa_light(ctx, i, GL_LINEAR_ATTENUATION, p);
1248                   }
1249                   {
1250                      GLfloat p[4] = { 0 };
1251                      p[0] = l->QuadraticAttenuation;
1252                      _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION, p);
1253                   }
1254                }
1255                /* light model */
1256                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1257                                   light->Model.Ambient);
1258                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1259                                  (GLfloat) light->Model.LocalViewer);
1260                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1261                                  (GLfloat) light->Model.TwoSide);
1262                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1263                                  (GLfloat) light->Model.ColorControl);
1264                /* shade model */
1265                _mesa_ShadeModel(light->ShadeModel);
1266                /* color material */
1267                _mesa_ColorMaterial(light->ColorMaterialFace,
1268                                    light->ColorMaterialMode);
1269                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1270                                 light->ColorMaterialEnabled);
1271                /* materials */
1272                memcpy(&ctx->Light.Material, &light->Material,
1273                       sizeof(struct gl_material));
1274                if (ctx->Extensions.ARB_color_buffer_float) {
1275                   _mesa_ClampColor(GL_CLAMP_VERTEX_COLOR_ARB,
1276                                    light->ClampVertexColor);
1277                }
1278             }
1279             break;
1280          case GL_LINE_BIT:
1281             {
1282                const struct gl_line_attrib *line;
1283                line = (const struct gl_line_attrib *) attr->data;
1284                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1285                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1286                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1287                _mesa_LineWidth(line->Width);
1288             }
1289             break;
1290          case GL_LIST_BIT:
1291             memcpy(&ctx->List, attr->data, sizeof(struct gl_list_attrib));
1292             break;
1293          case GL_PIXEL_MODE_BIT:
1294             memcpy(&ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib));
1295             /* XXX what other pixel state needs to be set by function calls? */
1296             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1297             ctx->NewState |= _NEW_PIXEL;
1298             break;
1299          case GL_POINT_BIT:
1300             {
1301                const struct gl_point_attrib *point;
1302                point = (const struct gl_point_attrib *) attr->data;
1303                _mesa_PointSize(point->Size);
1304                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1305                if (ctx->Extensions.EXT_point_parameters) {
1306                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1307                                          point->Params);
1308                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1309                                         point->MinSize);
1310                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1311                                         point->MaxSize);
1312                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1313                                         point->Threshold);
1314                }
1315                if (ctx->Extensions.NV_point_sprite
1316                    || ctx->Extensions.ARB_point_sprite) {
1317                   GLuint u;
1318                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1319                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1320                                    !!(point->CoordReplace & (1u << u)));
1321                   }
1322                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1323                   if (ctx->Extensions.NV_point_sprite)
1324                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1325                                            ctx->Point.SpriteRMode);
1326
1327                   if ((ctx->API == API_OPENGL_COMPAT && ctx->Version >= 20)
1328                       || ctx->API == API_OPENGL_CORE)
1329                      _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1330                                            (GLfloat)ctx->Point.SpriteOrigin);
1331                }
1332             }
1333             break;
1334          case GL_POLYGON_BIT:
1335             {
1336                const struct gl_polygon_attrib *polygon;
1337                polygon = (const struct gl_polygon_attrib *) attr->data;
1338                _mesa_CullFace(polygon->CullFaceMode);
1339                _mesa_FrontFace(polygon->FrontFace);
1340                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1341                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1342                _mesa_polygon_offset_clamp(ctx,
1343                                           polygon->OffsetFactor,
1344                                           polygon->OffsetUnits,
1345                                           polygon->OffsetClamp);
1346                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1347                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1348                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1349                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1350                                 polygon->OffsetPoint);
1351                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1352                                 polygon->OffsetLine);
1353                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1354                                 polygon->OffsetFill);
1355             }
1356             break;
1357          case GL_POLYGON_STIPPLE_BIT:
1358             memcpy(ctx->PolygonStipple, attr->data, 32*sizeof(GLuint));
1359
1360             if (ctx->DriverFlags.NewPolygonStipple)
1361                ctx->NewDriverState |= ctx->DriverFlags.NewPolygonStipple;
1362             else
1363                ctx->NewState |= _NEW_POLYGONSTIPPLE;
1364
1365             if (ctx->Driver.PolygonStipple)
1366                ctx->Driver.PolygonStipple(ctx, (const GLubyte *) attr->data);
1367             break;
1368          case GL_SCISSOR_BIT:
1369             {
1370                unsigned i;
1371                const struct gl_scissor_attrib *scissor;
1372                scissor = (const struct gl_scissor_attrib *) attr->data;
1373
1374                for (i = 0; i < ctx->Const.MaxViewports; i++) {
1375                   _mesa_set_scissor(ctx, i,
1376                                     scissor->ScissorArray[i].X,
1377                                     scissor->ScissorArray[i].Y,
1378                                     scissor->ScissorArray[i].Width,
1379                                     scissor->ScissorArray[i].Height);
1380                   _mesa_set_enablei(ctx, GL_SCISSOR_TEST, i,
1381                                     (scissor->EnableFlags >> i) & 1);
1382                }
1383                if (ctx->Extensions.EXT_window_rectangles) {
1384                   STATIC_ASSERT(sizeof(struct gl_scissor_rect) ==
1385                                 4 * sizeof(GLint));
1386                   _mesa_WindowRectanglesEXT(
1387                         scissor->WindowRectMode, scissor->NumWindowRects,
1388                         (const GLint *)scissor->WindowRects);
1389                }
1390             }
1391             break;
1392          case GL_STENCIL_BUFFER_BIT:
1393             {
1394                const struct gl_stencil_attrib *stencil;
1395                stencil = (const struct gl_stencil_attrib *) attr->data;
1396                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1397                _mesa_ClearStencil(stencil->Clear);
1398                if (ctx->Extensions.EXT_stencil_two_side) {
1399                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1400                                    stencil->TestTwoSide);
1401                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1402                                              ? GL_BACK : GL_FRONT);
1403                }
1404                /* front state */
1405                _mesa_StencilFuncSeparate(GL_FRONT,
1406                                          stencil->Function[0],
1407                                          stencil->Ref[0],
1408                                          stencil->ValueMask[0]);
1409                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1410                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1411                                        stencil->ZFailFunc[0],
1412                                        stencil->ZPassFunc[0]);
1413                /* back state */
1414                _mesa_StencilFuncSeparate(GL_BACK,
1415                                          stencil->Function[1],
1416                                          stencil->Ref[1],
1417                                          stencil->ValueMask[1]);
1418                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1419                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1420                                        stencil->ZFailFunc[1],
1421                                        stencil->ZPassFunc[1]);
1422             }
1423             break;
1424          case GL_TRANSFORM_BIT:
1425             {
1426                GLuint i;
1427                const struct gl_transform_attrib *xform;
1428                xform = (const struct gl_transform_attrib *) attr->data;
1429                _mesa_MatrixMode(xform->MatrixMode);
1430                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1431                   _math_matrix_analyse(ctx->ProjectionMatrixStack.Top);
1432
1433                /* restore clip planes */
1434                for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
1435                   const GLuint mask = 1 << i;
1436                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1437                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1438                   _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i,
1439                                    !!(xform->ClipPlanesEnabled & mask));
1440                   if (ctx->Driver.ClipPlane)
1441                      ctx->Driver.ClipPlane(ctx, GL_CLIP_PLANE0 + i, eyePlane);
1442                }
1443
1444                /* normalize/rescale */
1445                if (xform->Normalize != ctx->Transform.Normalize)
1446                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1447                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1448                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1449                                    ctx->Transform.RescaleNormals);
1450
1451                if (!ctx->Extensions.AMD_depth_clamp_separate) {
1452                   if (xform->DepthClampNear != ctx->Transform.DepthClampNear &&
1453                       xform->DepthClampFar != ctx->Transform.DepthClampFar) {
1454                      _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
1455                                       ctx->Transform.DepthClampNear &&
1456                                       ctx->Transform.DepthClampFar);
1457                   }
1458                } else {
1459                   if (xform->DepthClampNear != ctx->Transform.DepthClampNear)
1460                      _mesa_set_enable(ctx, GL_DEPTH_CLAMP_NEAR_AMD,
1461                                       ctx->Transform.DepthClampNear);
1462                   if (xform->DepthClampFar != ctx->Transform.DepthClampFar)
1463                      _mesa_set_enable(ctx, GL_DEPTH_CLAMP_FAR_AMD,
1464                                       ctx->Transform.DepthClampFar);
1465                }
1466
1467                if (ctx->Extensions.ARB_clip_control)
1468                   _mesa_ClipControl(xform->ClipOrigin, xform->ClipDepthMode);
1469             }
1470             break;
1471          case GL_TEXTURE_BIT:
1472             {
1473                struct texture_state *texstate
1474                   = (struct texture_state *) attr->data;
1475                pop_texture_group(ctx, texstate);
1476                ctx->NewState |= _NEW_TEXTURE_OBJECT | _NEW_TEXTURE_STATE;
1477             }
1478             break;
1479          case GL_VIEWPORT_BIT:
1480             {
1481                unsigned i;
1482                const struct viewport_state *viewstate;
1483                viewstate = (const struct viewport_state *) attr->data;
1484
1485                for (i = 0; i < ctx->Const.MaxViewports; i++) {
1486                   const struct gl_viewport_attrib *vp = &viewstate->ViewportArray[i];
1487                   _mesa_set_viewport(ctx, i, vp->X, vp->Y, vp->Width,
1488                                      vp->Height);
1489                   _mesa_set_depth_range(ctx, i, vp->Near, vp->Far);
1490                }
1491
1492                if (ctx->Extensions.NV_conservative_raster) {
1493                   GLuint biasx = viewstate->SubpixelPrecisionBias[0];
1494                   GLuint biasy = viewstate->SubpixelPrecisionBias[1];
1495                   _mesa_SubpixelPrecisionBiasNV(biasx, biasy);
1496                }
1497             }
1498             break;
1499          case GL_MULTISAMPLE_BIT_ARB:
1500             {
1501                const struct gl_multisample_attrib *ms;
1502                ms = (const struct gl_multisample_attrib *) attr->data;
1503
1504                TEST_AND_UPDATE(ctx->Multisample.Enabled,
1505                                ms->Enabled,
1506                                GL_MULTISAMPLE);
1507
1508                TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
1509                                ms->SampleCoverage,
1510                                GL_SAMPLE_COVERAGE);
1511
1512                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
1513                                ms->SampleAlphaToCoverage,
1514                                GL_SAMPLE_ALPHA_TO_COVERAGE);
1515
1516                TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
1517                                ms->SampleAlphaToOne,
1518                                GL_SAMPLE_ALPHA_TO_ONE);
1519
1520                _mesa_SampleCoverage(ms->SampleCoverageValue,
1521                                        ms->SampleCoverageInvert);
1522
1523                _mesa_AlphaToCoverageDitherControlNV(ms->SampleAlphaToCoverageDitherControl);
1524             }
1525             break;
1526
1527          default:
1528             unreachable("Bad attrib flag in PopAttrib");
1529       }
1530
1531       next = attr->next;
1532       free(attr->data);
1533       free(attr);
1534       attr = next;
1535    }
1536 }
1537
1538
1539 /**
1540  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1541  * object refcounts.
1542  */
1543 static void
1544 copy_pixelstore(struct gl_context *ctx,
1545                 struct gl_pixelstore_attrib *dst,
1546                 const struct gl_pixelstore_attrib *src)
1547 {
1548    dst->Alignment = src->Alignment;
1549    dst->RowLength = src->RowLength;
1550    dst->SkipPixels = src->SkipPixels;
1551    dst->SkipRows = src->SkipRows;
1552    dst->ImageHeight = src->ImageHeight;
1553    dst->SkipImages = src->SkipImages;
1554    dst->SwapBytes = src->SwapBytes;
1555    dst->LsbFirst = src->LsbFirst;
1556    dst->Invert = src->Invert;
1557    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1558 }
1559
1560
1561 #define GL_CLIENT_PACK_BIT (1<<20)
1562 #define GL_CLIENT_UNPACK_BIT (1<<21)
1563
1564 /**
1565  * Copy gl_vertex_array_object from src to dest.
1566  * 'dest' must be in an initialized state.
1567  */
1568 static void
1569 copy_array_object(struct gl_context *ctx,
1570                   struct gl_vertex_array_object *dest,
1571                   struct gl_vertex_array_object *src)
1572 {
1573    GLuint i;
1574
1575    /* skip Name */
1576    /* skip RefCount */
1577
1578    for (i = 0; i < ARRAY_SIZE(src->VertexAttrib); i++) {
1579       _mesa_copy_vertex_attrib_array(ctx, &dest->VertexAttrib[i], &src->VertexAttrib[i]);
1580       _mesa_copy_vertex_buffer_binding(ctx, &dest->BufferBinding[i], &src->BufferBinding[i]);
1581    }
1582
1583    /* Enabled must be the same than on push */
1584    dest->Enabled = src->Enabled;
1585    dest->_EffEnabledVBO = src->_EffEnabledVBO;
1586    dest->_EffEnabledNonZeroDivisor = src->_EffEnabledNonZeroDivisor;
1587    /* The bitmask of bound VBOs needs to match the VertexBinding array */
1588    dest->VertexAttribBufferMask = src->VertexAttribBufferMask;
1589    dest->NonZeroDivisorMask = src->NonZeroDivisorMask;
1590    dest->_AttributeMapMode = src->_AttributeMapMode;
1591    dest->NewArrays = src->NewArrays;
1592    dest->NumUpdates = src->NumUpdates;
1593    dest->IsDynamic = src->IsDynamic;
1594 }
1595
1596 /**
1597  * Copy gl_array_attrib from src to dest.
1598  * 'dest' must be in an initialized state.
1599  */
1600 static void
1601 copy_array_attrib(struct gl_context *ctx,
1602                   struct gl_array_attrib *dest,
1603                   struct gl_array_attrib *src,
1604                   bool vbo_deleted)
1605 {
1606    /* skip ArrayObj */
1607    /* skip DefaultArrayObj, Objects */
1608    dest->ActiveTexture = src->ActiveTexture;
1609    dest->LockFirst = src->LockFirst;
1610    dest->LockCount = src->LockCount;
1611    dest->PrimitiveRestart = src->PrimitiveRestart;
1612    dest->PrimitiveRestartFixedIndex = src->PrimitiveRestartFixedIndex;
1613    dest->_PrimitiveRestart = src->_PrimitiveRestart;
1614    dest->RestartIndex = src->RestartIndex;
1615    memcpy(dest->_RestartIndex, src->_RestartIndex, sizeof(src->_RestartIndex));
1616    /* skip NewState */
1617    /* skip RebindArrays */
1618
1619    if (!vbo_deleted)
1620       copy_array_object(ctx, dest->VAO, src->VAO);
1621
1622    /* skip ArrayBufferObj */
1623    /* skip IndexBufferObj */
1624
1625    /* Invalidate array state. It will be updated during the next draw. */
1626    _mesa_set_draw_vao(ctx, ctx->Array._EmptyVAO, 0);
1627 }
1628
1629 /**
1630  * Save the content of src to dest.
1631  */
1632 static void
1633 save_array_attrib(struct gl_context *ctx,
1634                   struct gl_array_attrib *dest,
1635                   struct gl_array_attrib *src)
1636 {
1637    /* Set the Name, needed for restore, but do never overwrite.
1638     * Needs to match value in the object hash. */
1639    dest->VAO->Name = src->VAO->Name;
1640    /* And copy all of the rest. */
1641    copy_array_attrib(ctx, dest, src, false);
1642
1643    /* Just reference them here */
1644    _mesa_reference_buffer_object(ctx, &dest->ArrayBufferObj,
1645                                  src->ArrayBufferObj);
1646    _mesa_reference_buffer_object(ctx, &dest->VAO->IndexBufferObj,
1647                                  src->VAO->IndexBufferObj);
1648 }
1649
1650 /**
1651  * Restore the content of src to dest.
1652  */
1653 static void
1654 restore_array_attrib(struct gl_context *ctx,
1655                      struct gl_array_attrib *dest,
1656                      struct gl_array_attrib *src)
1657 {
1658    bool is_vao_name_zero = src->VAO->Name == 0;
1659
1660    /* The ARB_vertex_array_object spec says:
1661     *
1662     *     "BindVertexArray fails and an INVALID_OPERATION error is generated
1663     *     if array is not a name returned from a previous call to
1664     *     GenVertexArrays, or if such a name has since been deleted with
1665     *     DeleteVertexArrays."
1666     *
1667     * Therefore popping a deleted VAO cannot magically recreate it.
1668     */
1669    if (!is_vao_name_zero && !_mesa_IsVertexArray(src->VAO->Name))
1670       return;
1671
1672    _mesa_BindVertexArray(src->VAO->Name);
1673
1674    /* Restore or recreate the buffer objects by the names ... */
1675    if (is_vao_name_zero || !src->ArrayBufferObj ||
1676        _mesa_IsBuffer(src->ArrayBufferObj->Name)) {
1677       /* ... and restore its content */
1678       copy_array_attrib(ctx, dest, src, false);
1679
1680       _mesa_BindBuffer(GL_ARRAY_BUFFER_ARB,
1681                        src->ArrayBufferObj ?
1682                           src->ArrayBufferObj->Name : 0);
1683    } else {
1684       copy_array_attrib(ctx, dest, src, true);
1685    }
1686
1687    if (is_vao_name_zero || !src->VAO->IndexBufferObj ||
1688        _mesa_IsBuffer(src->VAO->IndexBufferObj->Name)) {
1689       _mesa_BindBuffer(GL_ELEMENT_ARRAY_BUFFER_ARB,
1690                        src->VAO->IndexBufferObj ?
1691                           src->VAO->IndexBufferObj->Name : 0);
1692    }
1693 }
1694
1695
1696 void GLAPIENTRY
1697 _mesa_PushClientAttrib(GLbitfield mask)
1698 {
1699    struct gl_client_attrib_node *head;
1700
1701    GET_CURRENT_CONTEXT(ctx);
1702
1703    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1704       _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushClientAttrib");
1705       return;
1706    }
1707
1708    head = &ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1709    head->Mask = mask;
1710
1711    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1712       copy_pixelstore(ctx, &head->Pack, &ctx->Pack);
1713       copy_pixelstore(ctx, &head->Unpack, &ctx->Unpack);
1714    }
1715
1716    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1717       _mesa_initialize_vao(ctx, &head->VAO, 0);
1718       /* Use the VAO declared within the node instead of allocating it. */
1719       head->Array.VAO = &head->VAO;
1720       save_array_attrib(ctx, &head->Array, &ctx->Array);
1721    }
1722
1723    ctx->ClientAttribStackDepth++;
1724 }
1725
1726
1727 void GLAPIENTRY
1728 _mesa_PopClientAttrib(void)
1729 {
1730    struct gl_client_attrib_node *head;
1731
1732    GET_CURRENT_CONTEXT(ctx);
1733    FLUSH_VERTICES(ctx, 0);
1734
1735    if (ctx->ClientAttribStackDepth == 0) {
1736       _mesa_error(ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib");
1737       return;
1738    }
1739
1740    ctx->ClientAttribStackDepth--;
1741    head = &ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1742
1743    if (head->Mask & GL_CLIENT_PIXEL_STORE_BIT) {
1744       copy_pixelstore(ctx, &ctx->Pack, &head->Pack);
1745       _mesa_reference_buffer_object(ctx, &head->Pack.BufferObj, NULL);
1746
1747       copy_pixelstore(ctx, &ctx->Unpack, &head->Unpack);
1748       _mesa_reference_buffer_object(ctx, &head->Unpack.BufferObj, NULL);
1749    }
1750
1751    if (head->Mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1752       restore_array_attrib(ctx, &ctx->Array, &head->Array);
1753       _mesa_unbind_array_object_vbos(ctx, &head->VAO);
1754       _mesa_reference_buffer_object(ctx, &head->VAO.IndexBufferObj, NULL);
1755       _mesa_reference_buffer_object(ctx, &head->Array.ArrayBufferObj, NULL);
1756    }
1757 }
1758
1759 void GLAPIENTRY
1760 _mesa_ClientAttribDefaultEXT( GLbitfield mask )
1761 {
1762    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1763       _mesa_PixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
1764       _mesa_PixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
1765       _mesa_PixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0);
1766       _mesa_PixelStorei(GL_UNPACK_SKIP_IMAGES, 0);
1767       _mesa_PixelStorei(GL_UNPACK_ROW_LENGTH, 0);
1768       _mesa_PixelStorei(GL_UNPACK_SKIP_ROWS, 0);
1769       _mesa_PixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
1770       _mesa_PixelStorei(GL_UNPACK_ALIGNMENT, 4);
1771       _mesa_PixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
1772       _mesa_PixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
1773       _mesa_PixelStorei(GL_PACK_IMAGE_HEIGHT, 0);
1774       _mesa_PixelStorei(GL_PACK_SKIP_IMAGES, 0);
1775       _mesa_PixelStorei(GL_PACK_ROW_LENGTH, 0);
1776       _mesa_PixelStorei(GL_PACK_SKIP_ROWS, 0);
1777       _mesa_PixelStorei(GL_PACK_SKIP_PIXELS, 0);
1778       _mesa_PixelStorei(GL_PACK_ALIGNMENT, 4);
1779
1780       _mesa_BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
1781       _mesa_BindBuffer(GL_PIXEL_PACK_BUFFER, 0);
1782    }
1783    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1784       GET_CURRENT_CONTEXT(ctx);
1785       int i;
1786
1787       _mesa_BindBuffer(GL_ARRAY_BUFFER, 0);
1788       _mesa_BindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
1789
1790       _mesa_DisableClientState(GL_EDGE_FLAG_ARRAY);
1791       _mesa_EdgeFlagPointer(0, 0);
1792
1793       _mesa_DisableClientState(GL_INDEX_ARRAY);
1794       _mesa_IndexPointer(GL_FLOAT, 0, 0);
1795
1796       _mesa_DisableClientState(GL_SECONDARY_COLOR_ARRAY);
1797       _mesa_SecondaryColorPointer(4, GL_FLOAT, 0, 0);
1798
1799       _mesa_DisableClientState(GL_FOG_COORD_ARRAY);
1800       _mesa_FogCoordPointer(GL_FLOAT, 0, 0);
1801
1802       for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
1803          _mesa_ClientActiveTexture(GL_TEXTURE0 + i);
1804          _mesa_DisableClientState(GL_TEXTURE_COORD_ARRAY);
1805          _mesa_TexCoordPointer(4, GL_FLOAT, 0, 0);
1806       }
1807
1808       _mesa_DisableClientState(GL_COLOR_ARRAY);
1809       _mesa_ColorPointer(4, GL_FLOAT, 0, 0);
1810
1811       _mesa_DisableClientState(GL_NORMAL_ARRAY);
1812       _mesa_NormalPointer(GL_FLOAT, 0, 0);
1813
1814       _mesa_DisableClientState(GL_VERTEX_ARRAY);
1815       _mesa_VertexPointer(4, GL_FLOAT, 0, 0);
1816
1817       for (i = 0; i < ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs; i++) {
1818          _mesa_DisableVertexAttribArray(i);
1819          _mesa_VertexAttribPointer(i, 4, GL_FLOAT, GL_FALSE, 0, 0);
1820       }
1821
1822       _mesa_ClientActiveTexture(GL_TEXTURE0);
1823
1824       _mesa_PrimitiveRestartIndex_no_error(0);
1825       if (ctx->Version >= 31)
1826          _mesa_Disable(GL_PRIMITIVE_RESTART);
1827       else if (_mesa_has_NV_primitive_restart(ctx))
1828          _mesa_DisableClientState(GL_PRIMITIVE_RESTART_NV);
1829
1830       if (_mesa_has_ARB_ES3_compatibility(ctx))
1831          _mesa_Disable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
1832    }
1833 }
1834
1835 void GLAPIENTRY
1836 _mesa_PushClientAttribDefaultEXT( GLbitfield mask )
1837 {
1838    _mesa_PushClientAttrib(mask);
1839    _mesa_ClientAttribDefaultEXT(mask);
1840 }
1841
1842
1843 /**
1844  * Free any attribute state data that might be attached to the context.
1845  */
1846 void
1847 _mesa_free_attrib_data(struct gl_context *ctx)
1848 {
1849    while (ctx->AttribStackDepth > 0) {
1850       struct gl_attrib_node *attr, *next;
1851
1852       ctx->AttribStackDepth--;
1853       attr = ctx->AttribStack[ctx->AttribStackDepth];
1854
1855       while (attr) {
1856          if (attr->kind == GL_TEXTURE_BIT) {
1857             struct texture_state *texstate = (struct texture_state*)attr->data;
1858             GLuint u, tgt;
1859             /* clear references to the saved texture objects */
1860             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1861                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1862                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1863                }
1864             }
1865             _mesa_reference_shared_state(ctx, &texstate->SharedRef, NULL);
1866          }
1867          else {
1868             /* any other chunks of state that requires special handling? */
1869          }
1870
1871          next = attr->next;
1872          free(attr->data);
1873          free(attr);
1874          attr = next;
1875       }
1876    }
1877 }
1878
1879
1880 void
1881 _mesa_init_attrib(struct gl_context *ctx)
1882 {
1883    /* Renderer and client attribute stacks */
1884    ctx->AttribStackDepth = 0;
1885    ctx->ClientAttribStackDepth = 0;
1886 }