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