src/mesa/main/attrib.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.2
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #include "glheader.h"
  26 #include "imports.h"
  27 #include "accum.h"
  28 #include "arrayobj.h"
  29 #include "attrib.h"
  30 #include "blend.h"
  31 #include "buffers.h"
  32 #include "bufferobj.h"
  33 #include "clear.h"
  34 #include "colormac.h"
  35 #include "colortab.h"
  36 #include "context.h"
  37 #include "depth.h"
  38 #include "enable.h"
  39 #include "enums.h"
  40 #include "fog.h"
  41 #include "hint.h"
  42 #include "light.h"
  43 #include "lines.h"
  44 #include "matrix.h"
  45 #include "multisample.h"
  46 #include "points.h"
  47 #include "polygon.h"
  48 #include "scissor.h"
  49 #include "simple_list.h"
  50 #include "stencil.h"
  51 #include "texgen.h"
  52 #include "texobj.h"
  53 #include "texstate.h"
  54 #include "varray.h"
  55 #include "mtypes.h"
  56 #include "math/m_xform.h"
  57
  58 /**
  59  * Special struct for saving/restoring texture state (GL_TEXTURE_BIT)
  60  */
  61 struct texture_state
  62 {
  63    struct gl_texture_attrib Texture;  /**< The usual context state */
  64
  65    /** to save per texture object state (wrap modes, filters, etc): */
  66    struct gl_texture_object SavedObj[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  67
  68    /**
  69     * To save references to texture objects (so they don't get accidentally
  70     * deleted while saved in the attribute stack).
  71     */
  72    struct gl_texture_object *SavedTexRef[MAX_TEXTURE_UNITS][NUM_TEXTURE_TARGETS];
  73 };
  74
  75
  76 /**
  77  * Allocate a new attribute state node.  These nodes have a
  78  * "kind" value and a pointer to a struct of state data.
  79  */
  80 static struct gl_attrib_node *
  81 new_attrib_node( GLbitfield kind )
  82 {
  83    struct gl_attrib_node *an = MALLOC_STRUCT(gl_attrib_node);
  84    if (an) {
  85       an->kind = kind;
  86    }
  87    return an;
  88 }
  89
  90
  91 void GLAPIENTRY
  92 _mesa_PushAttrib(GLbitfield mask)
  93 {
  94    struct gl_attrib_node *newnode;
  95    struct gl_attrib_node *head;
  96
  97    GET_CURRENT_CONTEXT(ctx);
  98    ASSERT_OUTSIDE_BEGIN_END(ctx);
  99
 100    if (MESA_VERBOSE & VERBOSE_API)
 101       _mesa_debug(ctx, "glPushAttrib %x\n", (int) mask);
 102
 103    if (ctx->AttribStackDepth >= MAX_ATTRIB_STACK_DEPTH) {
 104       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushAttrib" );
 105       return;
 106    }
 107
 108    /* Build linked list of attribute nodes which save all attribute */
 109    /* groups specified by the mask. */
 110    head = NULL;
 111
 112    if (mask & GL_ACCUM_BUFFER_BIT) {
 113       struct gl_accum_attrib *attr;
 114       attr = MALLOC_STRUCT( gl_accum_attrib );
 115       MEMCPY( attr, &ctx->Accum, sizeof(struct gl_accum_attrib) );
 116       newnode = new_attrib_node( GL_ACCUM_BUFFER_BIT );
 117       newnode->data = attr;
 118       newnode->next = head;
 119       head = newnode;
 120    }
 121
 122    if (mask & GL_COLOR_BUFFER_BIT) {
 123       GLuint i;
 124       struct gl_colorbuffer_attrib *attr;
 125       attr = MALLOC_STRUCT( gl_colorbuffer_attrib );
 126       MEMCPY( attr, &ctx->Color, sizeof(struct gl_colorbuffer_attrib) );
 127       /* push the Draw FBO's DrawBuffer[] state, not ctx->Color.DrawBuffer[] */
 128       for (i = 0; i < ctx->Const.MaxDrawBuffers; i ++)
 129          attr->DrawBuffer[i] = ctx->DrawBuffer->ColorDrawBuffer[i];
 130       newnode = new_attrib_node( GL_COLOR_BUFFER_BIT );
 131       newnode->data = attr;
 132       newnode->next = head;
 133       head = newnode;
 134    }
 135
 136    if (mask & GL_CURRENT_BIT) {
 137       struct gl_current_attrib *attr;
 138       FLUSH_CURRENT( ctx, 0 );
 139       attr = MALLOC_STRUCT( gl_current_attrib );
 140       MEMCPY( attr, &ctx->Current, sizeof(struct gl_current_attrib) );
 141       newnode = new_attrib_node( GL_CURRENT_BIT );
 142       newnode->data = attr;
 143       newnode->next = head;
 144       head = newnode;
 145    }
 146
 147    if (mask & GL_DEPTH_BUFFER_BIT) {
 148       struct gl_depthbuffer_attrib *attr;
 149       attr = MALLOC_STRUCT( gl_depthbuffer_attrib );
 150       MEMCPY( attr, &ctx->Depth, sizeof(struct gl_depthbuffer_attrib) );
 151       newnode = new_attrib_node( GL_DEPTH_BUFFER_BIT );
 152       newnode->data = attr;
 153       newnode->next = head;
 154       head = newnode;
 155    }
 156
 157    if (mask & GL_ENABLE_BIT) {
 158       struct gl_enable_attrib *attr;
 159       GLuint i;
 160       attr = MALLOC_STRUCT( gl_enable_attrib );
 161       /* Copy enable flags from all other attributes into the enable struct. */
 162       attr->AlphaTest = ctx->Color.AlphaEnabled;
 163       attr->AutoNormal = ctx->Eval.AutoNormal;
 164       attr->Blend = ctx->Color.BlendEnabled;
 165       attr->ClipPlanes = ctx->Transform.ClipPlanesEnabled;
 166       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
 167       for (i = 0; i < COLORTABLE_MAX; i++) {
 168          attr->ColorTable[i] = ctx->Pixel.ColorTableEnabled[i];
 169       }
 170       attr->Convolution1D = ctx->Pixel.Convolution1DEnabled;
 171       attr->Convolution2D = ctx->Pixel.Convolution2DEnabled;
 172       attr->Separable2D = ctx->Pixel.Separable2DEnabled;
 173       attr->CullFace = ctx->Polygon.CullFlag;
 174       attr->DepthTest = ctx->Depth.Test;
 175       attr->Dither = ctx->Color.DitherFlag;
 176       attr->Fog = ctx->Fog.Enabled;
 177       for (i = 0; i < ctx->Const.MaxLights; i++) {
 178          attr->Light[i] = ctx->Light.Light[i].Enabled;
 179       }
 180       attr->Lighting = ctx->Light.Enabled;
 181       attr->LineSmooth = ctx->Line.SmoothFlag;
 182       attr->LineStipple = ctx->Line.StippleFlag;
 183       attr->Histogram = ctx->Pixel.HistogramEnabled;
 184       attr->MinMax = ctx->Pixel.MinMaxEnabled;
 185       attr->IndexLogicOp = ctx->Color.IndexLogicOpEnabled;
 186       attr->ColorLogicOp = ctx->Color.ColorLogicOpEnabled;
 187       attr->Map1Color4 = ctx->Eval.Map1Color4;
 188       attr->Map1Index = ctx->Eval.Map1Index;
 189       attr->Map1Normal = ctx->Eval.Map1Normal;
 190       attr->Map1TextureCoord1 = ctx->Eval.Map1TextureCoord1;
 191       attr->Map1TextureCoord2 = ctx->Eval.Map1TextureCoord2;
 192       attr->Map1TextureCoord3 = ctx->Eval.Map1TextureCoord3;
 193       attr->Map1TextureCoord4 = ctx->Eval.Map1TextureCoord4;
 194       attr->Map1Vertex3 = ctx->Eval.Map1Vertex3;
 195       attr->Map1Vertex4 = ctx->Eval.Map1Vertex4;
 196       MEMCPY(attr->Map1Attrib, ctx->Eval.Map1Attrib, sizeof(ctx->Eval.Map1Attrib));
 197       attr->Map2Color4 = ctx->Eval.Map2Color4;
 198       attr->Map2Index = ctx->Eval.Map2Index;
 199       attr->Map2Normal = ctx->Eval.Map2Normal;
 200       attr->Map2TextureCoord1 = ctx->Eval.Map2TextureCoord1;
 201       attr->Map2TextureCoord2 = ctx->Eval.Map2TextureCoord2;
 202       attr->Map2TextureCoord3 = ctx->Eval.Map2TextureCoord3;
 203       attr->Map2TextureCoord4 = ctx->Eval.Map2TextureCoord4;
 204       attr->Map2Vertex3 = ctx->Eval.Map2Vertex3;
 205       attr->Map2Vertex4 = ctx->Eval.Map2Vertex4;
 206       MEMCPY(attr->Map2Attrib, ctx->Eval.Map2Attrib, sizeof(ctx->Eval.Map2Attrib));
 207       attr->Normalize = ctx->Transform.Normalize;
 208       attr->RasterPositionUnclipped = ctx->Transform.RasterPositionUnclipped;
 209       attr->PointSmooth = ctx->Point.SmoothFlag;
 210       attr->PointSprite = ctx->Point.PointSprite;
 211       attr->PolygonOffsetPoint = ctx->Polygon.OffsetPoint;
 212       attr->PolygonOffsetLine = ctx->Polygon.OffsetLine;
 213       attr->PolygonOffsetFill = ctx->Polygon.OffsetFill;
 214       attr->PolygonSmooth = ctx->Polygon.SmoothFlag;
 215       attr->PolygonStipple = ctx->Polygon.StippleFlag;
 216       attr->RescaleNormals = ctx->Transform.RescaleNormals;
 217       attr->Scissor = ctx->Scissor.Enabled;
 218       attr->Stencil = ctx->Stencil.Enabled;
 219       attr->StencilTwoSide = ctx->Stencil.TestTwoSide;
 220       attr->MultisampleEnabled = ctx->Multisample.Enabled;
 221       attr->SampleAlphaToCoverage = ctx->Multisample.SampleAlphaToCoverage;
 222       attr->SampleAlphaToOne = ctx->Multisample.SampleAlphaToOne;
 223       attr->SampleCoverage = ctx->Multisample.SampleCoverage;
 224       attr->SampleCoverageInvert = ctx->Multisample.SampleCoverageInvert;
 225       for (i=0; i<MAX_TEXTURE_UNITS; i++) {
 226          attr->Texture[i] = ctx->Texture.Unit[i].Enabled;
 227          attr->TexGen[i] = ctx->Texture.Unit[i].TexGenEnabled;
 228          attr->TextureColorTable[i] = ctx->Texture.Unit[i].ColorTableEnabled;
 229       }
 230       /* GL_NV_vertex_program */
 231       attr->VertexProgram = ctx->VertexProgram.Enabled;
 232       attr->VertexProgramPointSize = ctx->VertexProgram.PointSizeEnabled;
 233       attr->VertexProgramTwoSide = ctx->VertexProgram.TwoSideEnabled;
 234       newnode = new_attrib_node( GL_ENABLE_BIT );
 235       newnode->data = attr;
 236       newnode->next = head;
 237       head = newnode;
 238    }
 239
 240    if (mask & GL_EVAL_BIT) {
 241       struct gl_eval_attrib *attr;
 242       attr = MALLOC_STRUCT( gl_eval_attrib );
 243       MEMCPY( attr, &ctx->Eval, sizeof(struct gl_eval_attrib) );
 244       newnode = new_attrib_node( GL_EVAL_BIT );
 245       newnode->data = attr;
 246       newnode->next = head;
 247       head = newnode;
 248    }
 249
 250    if (mask & GL_FOG_BIT) {
 251       struct gl_fog_attrib *attr;
 252       attr = MALLOC_STRUCT( gl_fog_attrib );
 253       MEMCPY( attr, &ctx->Fog, sizeof(struct gl_fog_attrib) );
 254       newnode = new_attrib_node( GL_FOG_BIT );
 255       newnode->data = attr;
 256       newnode->next = head;
 257       head = newnode;
 258    }
 259
 260    if (mask & GL_HINT_BIT) {
 261       struct gl_hint_attrib *attr;
 262       attr = MALLOC_STRUCT( gl_hint_attrib );
 263       MEMCPY( attr, &ctx->Hint, sizeof(struct gl_hint_attrib) );
 264       newnode = new_attrib_node( GL_HINT_BIT );
 265       newnode->data = attr;
 266       newnode->next = head;
 267       head = newnode;
 268    }
 269
 270    if (mask & GL_LIGHTING_BIT) {
 271       struct gl_light_attrib *attr;
 272       FLUSH_CURRENT(ctx, 0);    /* flush material changes */
 273       attr = MALLOC_STRUCT( gl_light_attrib );
 274       MEMCPY( attr, &ctx->Light, sizeof(struct gl_light_attrib) );
 275       newnode = new_attrib_node( GL_LIGHTING_BIT );
 276       newnode->data = attr;
 277       newnode->next = head;
 278       head = newnode;
 279    }
 280
 281    if (mask & GL_LINE_BIT) {
 282       struct gl_line_attrib *attr;
 283       attr = MALLOC_STRUCT( gl_line_attrib );
 284       MEMCPY( attr, &ctx->Line, sizeof(struct gl_line_attrib) );
 285       newnode = new_attrib_node( GL_LINE_BIT );
 286       newnode->data = attr;
 287       newnode->next = head;
 288       head = newnode;
 289    }
 290
 291    if (mask & GL_LIST_BIT) {
 292       struct gl_list_attrib *attr;
 293       attr = MALLOC_STRUCT( gl_list_attrib );
 294       MEMCPY( attr, &ctx->List, sizeof(struct gl_list_attrib) );
 295       newnode = new_attrib_node( GL_LIST_BIT );
 296       newnode->data = attr;
 297       newnode->next = head;
 298       head = newnode;
 299    }
 300
 301    if (mask & GL_PIXEL_MODE_BIT) {
 302       struct gl_pixel_attrib *attr;
 303       attr = MALLOC_STRUCT( gl_pixel_attrib );
 304       MEMCPY( attr, &ctx->Pixel, sizeof(struct gl_pixel_attrib) );
 305       /* push the Read FBO's ReadBuffer state, not ctx->Pixel.ReadBuffer */
 306       attr->ReadBuffer = ctx->ReadBuffer->ColorReadBuffer;
 307       newnode = new_attrib_node( GL_PIXEL_MODE_BIT );
 308       newnode->data = attr;
 309       newnode->next = head;
 310       head = newnode;
 311    }
 312
 313    if (mask & GL_POINT_BIT) {
 314       struct gl_point_attrib *attr;
 315       attr = MALLOC_STRUCT( gl_point_attrib );
 316       MEMCPY( attr, &ctx->Point, sizeof(struct gl_point_attrib) );
 317       newnode = new_attrib_node( GL_POINT_BIT );
 318       newnode->data = attr;
 319       newnode->next = head;
 320       head = newnode;
 321    }
 322
 323    if (mask & GL_POLYGON_BIT) {
 324       struct gl_polygon_attrib *attr;
 325       attr = MALLOC_STRUCT( gl_polygon_attrib );
 326       MEMCPY( attr, &ctx->Polygon, sizeof(struct gl_polygon_attrib) );
 327       newnode = new_attrib_node( GL_POLYGON_BIT );
 328       newnode->data = attr;
 329       newnode->next = head;
 330       head = newnode;
 331    }
 332
 333    if (mask & GL_POLYGON_STIPPLE_BIT) {
 334       GLuint *stipple;
 335       stipple = (GLuint *) MALLOC( 32*sizeof(GLuint) );
 336       MEMCPY( stipple, ctx->PolygonStipple, 32*sizeof(GLuint) );
 337       newnode = new_attrib_node( GL_POLYGON_STIPPLE_BIT );
 338       newnode->data = stipple;
 339       newnode->next = head;
 340       head = newnode;
 341    }
 342
 343    if (mask & GL_SCISSOR_BIT) {
 344       struct gl_scissor_attrib *attr;
 345       attr = MALLOC_STRUCT( gl_scissor_attrib );
 346       MEMCPY( attr, &ctx->Scissor, sizeof(struct gl_scissor_attrib) );
 347       newnode = new_attrib_node( GL_SCISSOR_BIT );
 348       newnode->data = attr;
 349       newnode->next = head;
 350       head = newnode;
 351    }
 352
 353    if (mask & GL_STENCIL_BUFFER_BIT) {
 354       struct gl_stencil_attrib *attr;
 355       attr = MALLOC_STRUCT( gl_stencil_attrib );
 356       MEMCPY( attr, &ctx->Stencil, sizeof(struct gl_stencil_attrib) );
 357       newnode = new_attrib_node( GL_STENCIL_BUFFER_BIT );
 358       newnode->data = attr;
 359       newnode->next = head;
 360       head = newnode;
 361    }
 362
 363    if (mask & GL_TEXTURE_BIT) {
 364       struct texture_state *texstate = CALLOC_STRUCT(texture_state);
 365       GLuint u;
 366
 367       if (!texstate) {
 368          _mesa_error(ctx, GL_OUT_OF_MEMORY, "glPushAttrib(GL_TEXTURE_BIT)");
 369          goto end;
 370       }
 371
 372       _mesa_lock_context_textures(ctx);
 373
 374       /* copy/save the bulk of texture state here */
 375       _mesa_memcpy(&texstate->Texture, &ctx->Texture, sizeof(ctx->Texture));
 376
 377       /* Save references to the currently bound texture objects so they don't
 378        * accidentally get deleted while referenced in the attribute stack.
 379        */
 380       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 381          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_INDEX],
 382                                 ctx->Texture.Unit[u].Current1D);
 383          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_INDEX],
 384                                 ctx->Texture.Unit[u].Current2D);
 385          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_3D_INDEX],
 386                                 ctx->Texture.Unit[u].Current3D);
 387          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_CUBE_INDEX],
 388                                 ctx->Texture.Unit[u].CurrentCubeMap);
 389          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_RECT_INDEX],
 390                                 ctx->Texture.Unit[u].CurrentRect);
 391          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_1D_ARRAY_INDEX],
 392                                 ctx->Texture.Unit[u].Current1DArray);
 393          _mesa_reference_texobj(&texstate->SavedTexRef[u][TEXTURE_2D_ARRAY_INDEX],
 394                                 ctx->Texture.Unit[u].Current2DArray);
 395       }
 396
 397       /* copy state/contents of the currently bound texture objects */
 398       for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 399          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_INDEX],
 400                                    ctx->Texture.Unit[u].Current1D);
 401          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_INDEX],
 402                                    ctx->Texture.Unit[u].Current2D);
 403          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_3D_INDEX],
 404                                    ctx->Texture.Unit[u].Current3D);
 405          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_CUBE_INDEX],
 406                                    ctx->Texture.Unit[u].CurrentCubeMap);
 407          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_RECT_INDEX],
 408                                    ctx->Texture.Unit[u].CurrentRect);
 409          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_1D_ARRAY_INDEX],
 410                                    ctx->Texture.Unit[u].Current1DArray);
 411          _mesa_copy_texture_object(&texstate->SavedObj[u][TEXTURE_2D_ARRAY_INDEX],
 412                                    ctx->Texture.Unit[u].Current2DArray);
 413       }
 414
 415       _mesa_unlock_context_textures(ctx);
 416
 417       newnode = new_attrib_node( GL_TEXTURE_BIT );
 418       newnode->data = texstate;
 419       newnode->next = head;
 420       head = newnode;
 421    }
 422
 423    if (mask & GL_TRANSFORM_BIT) {
 424       struct gl_transform_attrib *attr;
 425       attr = MALLOC_STRUCT( gl_transform_attrib );
 426       MEMCPY( attr, &ctx->Transform, sizeof(struct gl_transform_attrib) );
 427       newnode = new_attrib_node( GL_TRANSFORM_BIT );
 428       newnode->data = attr;
 429       newnode->next = head;
 430       head = newnode;
 431    }
 432
 433    if (mask & GL_VIEWPORT_BIT) {
 434       struct gl_viewport_attrib *attr;
 435       attr = MALLOC_STRUCT( gl_viewport_attrib );
 436       MEMCPY( attr, &ctx->Viewport, sizeof(struct gl_viewport_attrib) );
 437       newnode = new_attrib_node( GL_VIEWPORT_BIT );
 438       newnode->data = attr;
 439       newnode->next = head;
 440       head = newnode;
 441    }
 442
 443    /* GL_ARB_multisample */
 444    if (mask & GL_MULTISAMPLE_BIT_ARB) {
 445       struct gl_multisample_attrib *attr;
 446       attr = MALLOC_STRUCT( gl_multisample_attrib );
 447       MEMCPY( attr, &ctx->Multisample, sizeof(struct gl_multisample_attrib) );
 448       newnode = new_attrib_node( GL_MULTISAMPLE_BIT_ARB );
 449       newnode->data = attr;
 450       newnode->next = head;
 451       head = newnode;
 452    }
 453
 454 end:
 455    ctx->AttribStack[ctx->AttribStackDepth] = head;
 456    ctx->AttribStackDepth++;
 457 }
 458
 459
 460
 461 static void
 462 pop_enable_group(GLcontext *ctx, const struct gl_enable_attrib *enable)
 463 {
 464    GLuint i;
 465
 466 #define TEST_AND_UPDATE(VALUE, NEWVALUE, ENUM)          \
 467         if ((VALUE) != (NEWVALUE)) {                    \
 468            _mesa_set_enable( ctx, ENUM, (NEWVALUE) );   \
 469         }
 470
 471    TEST_AND_UPDATE(ctx->Color.AlphaEnabled, enable->AlphaTest, GL_ALPHA_TEST);
 472    TEST_AND_UPDATE(ctx->Color.BlendEnabled, enable->Blend, GL_BLEND);
 473
 474    for (i=0;i<MAX_CLIP_PLANES;i++) {
 475       const GLuint mask = 1 << i;
 476       if ((ctx->Transform.ClipPlanesEnabled & mask) != (enable->ClipPlanes & mask))
 477           _mesa_set_enable(ctx, (GLenum) (GL_CLIP_PLANE0 + i),
 478                            (GLboolean) ((enable->ClipPlanes & mask) ? GL_TRUE : GL_FALSE));
 479    }
 480
 481    TEST_AND_UPDATE(ctx->Light.ColorMaterialEnabled, enable->ColorMaterial,
 482                    GL_COLOR_MATERIAL);
 483    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_PRECONVOLUTION],
 484                    enable->ColorTable[COLORTABLE_PRECONVOLUTION],
 485                    GL_COLOR_TABLE);
 486    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCONVOLUTION],
 487                    enable->ColorTable[COLORTABLE_POSTCONVOLUTION],
 488                    GL_POST_CONVOLUTION_COLOR_TABLE);
 489    TEST_AND_UPDATE(ctx->Pixel.ColorTableEnabled[COLORTABLE_POSTCOLORMATRIX],
 490                    enable->ColorTable[COLORTABLE_POSTCOLORMATRIX],
 491                    GL_POST_COLOR_MATRIX_COLOR_TABLE);
 492    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
 493    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
 494    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
 495    TEST_AND_UPDATE(ctx->Pixel.Convolution1DEnabled, enable->Convolution1D,
 496                    GL_CONVOLUTION_1D);
 497    TEST_AND_UPDATE(ctx->Pixel.Convolution2DEnabled, enable->Convolution2D,
 498                    GL_CONVOLUTION_2D);
 499    TEST_AND_UPDATE(ctx->Pixel.Separable2DEnabled, enable->Separable2D,
 500                    GL_SEPARABLE_2D);
 501    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
 502    TEST_AND_UPDATE(ctx->Light.Enabled, enable->Lighting, GL_LIGHTING);
 503    TEST_AND_UPDATE(ctx->Line.SmoothFlag, enable->LineSmooth, GL_LINE_SMOOTH);
 504    TEST_AND_UPDATE(ctx->Line.StippleFlag, enable->LineStipple,
 505                    GL_LINE_STIPPLE);
 506    TEST_AND_UPDATE(ctx->Color.IndexLogicOpEnabled, enable->IndexLogicOp,
 507                    GL_INDEX_LOGIC_OP);
 508    TEST_AND_UPDATE(ctx->Color.ColorLogicOpEnabled, enable->ColorLogicOp,
 509                    GL_COLOR_LOGIC_OP);
 510
 511    TEST_AND_UPDATE(ctx->Eval.Map1Color4, enable->Map1Color4, GL_MAP1_COLOR_4);
 512    TEST_AND_UPDATE(ctx->Eval.Map1Index, enable->Map1Index, GL_MAP1_INDEX);
 513    TEST_AND_UPDATE(ctx->Eval.Map1Normal, enable->Map1Normal, GL_MAP1_NORMAL);
 514    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord1, enable->Map1TextureCoord1,
 515                    GL_MAP1_TEXTURE_COORD_1);
 516    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord2, enable->Map1TextureCoord2,
 517                    GL_MAP1_TEXTURE_COORD_2);
 518    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord3, enable->Map1TextureCoord3,
 519                    GL_MAP1_TEXTURE_COORD_3);
 520    TEST_AND_UPDATE(ctx->Eval.Map1TextureCoord4, enable->Map1TextureCoord4,
 521                    GL_MAP1_TEXTURE_COORD_4);
 522    TEST_AND_UPDATE(ctx->Eval.Map1Vertex3, enable->Map1Vertex3,
 523                    GL_MAP1_VERTEX_3);
 524    TEST_AND_UPDATE(ctx->Eval.Map1Vertex4, enable->Map1Vertex4,
 525                    GL_MAP1_VERTEX_4);
 526    for (i = 0; i < 16; i++) {
 527       TEST_AND_UPDATE(ctx->Eval.Map1Attrib[i], enable->Map1Attrib[i],
 528                       GL_MAP1_VERTEX_ATTRIB0_4_NV + i);
 529    }
 530
 531    TEST_AND_UPDATE(ctx->Eval.Map2Color4, enable->Map2Color4, GL_MAP2_COLOR_4);
 532    TEST_AND_UPDATE(ctx->Eval.Map2Index, enable->Map2Index, GL_MAP2_INDEX);
 533    TEST_AND_UPDATE(ctx->Eval.Map2Normal, enable->Map2Normal, GL_MAP2_NORMAL);
 534    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord1, enable->Map2TextureCoord1,
 535                    GL_MAP2_TEXTURE_COORD_1);
 536    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord2, enable->Map2TextureCoord2,
 537                    GL_MAP2_TEXTURE_COORD_2);
 538    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord3, enable->Map2TextureCoord3,
 539                    GL_MAP2_TEXTURE_COORD_3);
 540    TEST_AND_UPDATE(ctx->Eval.Map2TextureCoord4, enable->Map2TextureCoord4,
 541                    GL_MAP2_TEXTURE_COORD_4);
 542    TEST_AND_UPDATE(ctx->Eval.Map2Vertex3, enable->Map2Vertex3,
 543                    GL_MAP2_VERTEX_3);
 544    TEST_AND_UPDATE(ctx->Eval.Map2Vertex4, enable->Map2Vertex4,
 545                    GL_MAP2_VERTEX_4);
 546    for (i = 0; i < 16; i++) {
 547       TEST_AND_UPDATE(ctx->Eval.Map2Attrib[i], enable->Map2Attrib[i],
 548                       GL_MAP2_VERTEX_ATTRIB0_4_NV + i);
 549    }
 550
 551    TEST_AND_UPDATE(ctx->Eval.AutoNormal, enable->AutoNormal, GL_AUTO_NORMAL);
 552    TEST_AND_UPDATE(ctx->Transform.Normalize, enable->Normalize, GL_NORMALIZE);
 553    TEST_AND_UPDATE(ctx->Transform.RescaleNormals, enable->RescaleNormals,
 554                    GL_RESCALE_NORMAL_EXT);
 555    TEST_AND_UPDATE(ctx->Transform.RasterPositionUnclipped,
 556                    enable->RasterPositionUnclipped,
 557                    GL_RASTER_POSITION_UNCLIPPED_IBM);
 558    TEST_AND_UPDATE(ctx->Point.SmoothFlag, enable->PointSmooth,
 559                    GL_POINT_SMOOTH);
 560    if (ctx->Extensions.NV_point_sprite || ctx->Extensions.ARB_point_sprite) {
 561       TEST_AND_UPDATE(ctx->Point.PointSprite, enable->PointSprite,
 562                       GL_POINT_SPRITE_NV);
 563    }
 564    TEST_AND_UPDATE(ctx->Polygon.OffsetPoint, enable->PolygonOffsetPoint,
 565                    GL_POLYGON_OFFSET_POINT);
 566    TEST_AND_UPDATE(ctx->Polygon.OffsetLine, enable->PolygonOffsetLine,
 567                    GL_POLYGON_OFFSET_LINE);
 568    TEST_AND_UPDATE(ctx->Polygon.OffsetFill, enable->PolygonOffsetFill,
 569                    GL_POLYGON_OFFSET_FILL);
 570    TEST_AND_UPDATE(ctx->Polygon.SmoothFlag, enable->PolygonSmooth,
 571                    GL_POLYGON_SMOOTH);
 572    TEST_AND_UPDATE(ctx->Polygon.StippleFlag, enable->PolygonStipple,
 573                    GL_POLYGON_STIPPLE);
 574    TEST_AND_UPDATE(ctx->Scissor.Enabled, enable->Scissor, GL_SCISSOR_TEST);
 575    TEST_AND_UPDATE(ctx->Stencil.Enabled, enable->Stencil, GL_STENCIL_TEST);
 576    if (ctx->Extensions.EXT_stencil_two_side) {
 577       TEST_AND_UPDATE(ctx->Stencil.TestTwoSide, enable->StencilTwoSide, GL_STENCIL_TEST_TWO_SIDE_EXT);
 578    }
 579    TEST_AND_UPDATE(ctx->Multisample.Enabled, enable->MultisampleEnabled,
 580                    GL_MULTISAMPLE_ARB);
 581    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToCoverage,
 582                    enable->SampleAlphaToCoverage,
 583                    GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
 584    TEST_AND_UPDATE(ctx->Multisample.SampleAlphaToOne,
 585                    enable->SampleAlphaToOne,
 586                    GL_SAMPLE_ALPHA_TO_ONE_ARB);
 587    TEST_AND_UPDATE(ctx->Multisample.SampleCoverage,
 588                    enable->SampleCoverage,
 589                    GL_SAMPLE_COVERAGE_ARB);
 590    TEST_AND_UPDATE(ctx->Multisample.SampleCoverageInvert,
 591                    enable->SampleCoverageInvert,
 592                    GL_SAMPLE_COVERAGE_INVERT_ARB);
 593    /* GL_ARB_vertex_program, GL_NV_vertex_program */
 594    TEST_AND_UPDATE(ctx->VertexProgram.Enabled,
 595                    enable->VertexProgram,
 596                    GL_VERTEX_PROGRAM_ARB);
 597    TEST_AND_UPDATE(ctx->VertexProgram.PointSizeEnabled,
 598                    enable->VertexProgramPointSize,
 599                    GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 600    TEST_AND_UPDATE(ctx->VertexProgram.TwoSideEnabled,
 601                    enable->VertexProgramTwoSide,
 602                    GL_VERTEX_PROGRAM_TWO_SIDE_ARB);
 603
 604 #undef TEST_AND_UPDATE
 605
 606    /* texture unit enables */
 607    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 608       if (ctx->Texture.Unit[i].Enabled != enable->Texture[i]) {
 609          ctx->Texture.Unit[i].Enabled = enable->Texture[i];
 610          if (ctx->Driver.Enable) {
 611             if (ctx->Driver.ActiveTexture) {
 612                (*ctx->Driver.ActiveTexture)(ctx, i);
 613             }
 614             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_1D,
 615                              (GLboolean) (enable->Texture[i] & TEXTURE_1D_BIT) );
 616             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_2D,
 617                              (GLboolean) (enable->Texture[i] & TEXTURE_2D_BIT) );
 618             (*ctx->Driver.Enable)( ctx, GL_TEXTURE_3D,
 619                              (GLboolean) (enable->Texture[i] & TEXTURE_3D_BIT) );
 620             if (ctx->Extensions.ARB_texture_cube_map)
 621                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_CUBE_MAP_ARB,
 622                           (GLboolean) (enable->Texture[i] & TEXTURE_CUBE_BIT) );
 623             if (ctx->Extensions.NV_texture_rectangle)
 624                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_RECTANGLE_NV,
 625                           (GLboolean) (enable->Texture[i] & TEXTURE_RECT_BIT) );
 626          }
 627       }
 628
 629       if (ctx->Texture.Unit[i].TexGenEnabled != enable->TexGen[i]) {
 630          ctx->Texture.Unit[i].TexGenEnabled = enable->TexGen[i];
 631          if (ctx->Driver.Enable) {
 632             if (ctx->Driver.ActiveTexture) {
 633                (*ctx->Driver.ActiveTexture)(ctx, i);
 634             }
 635             if (enable->TexGen[i] & S_BIT)
 636                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_TRUE);
 637             else
 638                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_S, GL_FALSE);
 639             if (enable->TexGen[i] & T_BIT)
 640                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_TRUE);
 641             else
 642                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_T, GL_FALSE);
 643             if (enable->TexGen[i] & R_BIT)
 644                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_TRUE);
 645             else
 646                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_R, GL_FALSE);
 647             if (enable->TexGen[i] & Q_BIT)
 648                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_TRUE);
 649             else
 650                (*ctx->Driver.Enable)( ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
 651          }
 652       }
 653
 654       /* GL_SGI_texture_color_table */
 655       ctx->Texture.Unit[i].ColorTableEnabled = enable->TextureColorTable[i];
 656    }
 657
 658    if (ctx->Driver.ActiveTexture) {
 659       (*ctx->Driver.ActiveTexture)(ctx, ctx->Texture.CurrentUnit);
 660    }
 661 }
 662
 663
 664 /**
 665  * Pop/restore texture attribute/group state.
 666  */
 667 static void
 668 pop_texture_group(GLcontext *ctx, struct texture_state *texstate)
 669 {
 670    GLuint u;
 671
 672    _mesa_lock_context_textures(ctx);
 673
 674    for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
 675       const struct gl_texture_unit *unit = &texstate->Texture.Unit[u];
 676       GLuint tgt;
 677
 678       _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + u);
 679       _mesa_set_enable(ctx, GL_TEXTURE_1D,
 680                        (unit->Enabled & TEXTURE_1D_BIT) ? GL_TRUE : GL_FALSE);
 681       _mesa_set_enable(ctx, GL_TEXTURE_2D,
 682                        (unit->Enabled & TEXTURE_2D_BIT) ? GL_TRUE : GL_FALSE);
 683       _mesa_set_enable(ctx, GL_TEXTURE_3D,
 684                        (unit->Enabled & TEXTURE_3D_BIT) ? GL_TRUE : GL_FALSE);
 685       if (ctx->Extensions.ARB_texture_cube_map) {
 686          _mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP_ARB,
 687                      (unit->Enabled & TEXTURE_CUBE_BIT) ? GL_TRUE : GL_FALSE);
 688       }
 689       if (ctx->Extensions.NV_texture_rectangle) {
 690          _mesa_set_enable(ctx, GL_TEXTURE_RECTANGLE_NV,
 691                      (unit->Enabled & TEXTURE_RECT_BIT) ? GL_TRUE : GL_FALSE);
 692       }
 693       if (ctx->Extensions.SGI_texture_color_table) {
 694          _mesa_set_enable(ctx, GL_TEXTURE_COLOR_TABLE_SGI,
 695                           unit->ColorTableEnabled);
 696       }
 697       _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->EnvMode);
 698       _mesa_TexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, unit->EnvColor);
 699       _mesa_TexGeni(GL_S, GL_TEXTURE_GEN_MODE, unit->GenModeS);
 700       _mesa_TexGeni(GL_T, GL_TEXTURE_GEN_MODE, unit->GenModeT);
 701       _mesa_TexGeni(GL_R, GL_TEXTURE_GEN_MODE, unit->GenModeR);
 702       _mesa_TexGeni(GL_Q, GL_TEXTURE_GEN_MODE, unit->GenModeQ);
 703       _mesa_TexGenfv(GL_S, GL_OBJECT_PLANE, unit->ObjectPlaneS);
 704       _mesa_TexGenfv(GL_T, GL_OBJECT_PLANE, unit->ObjectPlaneT);
 705       _mesa_TexGenfv(GL_R, GL_OBJECT_PLANE, unit->ObjectPlaneR);
 706       _mesa_TexGenfv(GL_Q, GL_OBJECT_PLANE, unit->ObjectPlaneQ);
 707       /* Eye plane done differently to avoid re-transformation */
 708       {
 709          struct gl_texture_unit *destUnit = &ctx->Texture.Unit[u];
 710          COPY_4FV(destUnit->EyePlaneS, unit->EyePlaneS);
 711          COPY_4FV(destUnit->EyePlaneT, unit->EyePlaneT);
 712          COPY_4FV(destUnit->EyePlaneR, unit->EyePlaneR);
 713          COPY_4FV(destUnit->EyePlaneQ, unit->EyePlaneQ);
 714          if (ctx->Driver.TexGen) {
 715             ctx->Driver.TexGen(ctx, GL_S, GL_EYE_PLANE, unit->EyePlaneS);
 716             ctx->Driver.TexGen(ctx, GL_T, GL_EYE_PLANE, unit->EyePlaneT);
 717             ctx->Driver.TexGen(ctx, GL_R, GL_EYE_PLANE, unit->EyePlaneR);
 718             ctx->Driver.TexGen(ctx, GL_Q, GL_EYE_PLANE, unit->EyePlaneQ);
 719          }
 720       }
 721       _mesa_set_enable(ctx, GL_TEXTURE_GEN_S,
 722                        ((unit->TexGenEnabled & S_BIT) ? GL_TRUE : GL_FALSE));
 723       _mesa_set_enable(ctx, GL_TEXTURE_GEN_T,
 724                        ((unit->TexGenEnabled & T_BIT) ? GL_TRUE : GL_FALSE));
 725       _mesa_set_enable(ctx, GL_TEXTURE_GEN_R,
 726                        ((unit->TexGenEnabled & R_BIT) ? GL_TRUE : GL_FALSE));
 727       _mesa_set_enable(ctx, GL_TEXTURE_GEN_Q,
 728                        ((unit->TexGenEnabled & Q_BIT) ? GL_TRUE : GL_FALSE));
 729       if (ctx->Extensions.EXT_texture_lod_bias) {
 730          _mesa_TexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 731                        GL_TEXTURE_LOD_BIAS_EXT, unit->LodBias);
 732       }
 733       if (ctx->Extensions.EXT_texture_env_combine ||
 734           ctx->Extensions.ARB_texture_env_combine) {
 735          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,
 736                        unit->Combine.ModeRGB);
 737          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA,
 738                        unit->Combine.ModeA);
 739          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB,
 740                        unit->Combine.SourceRGB[0]);
 741          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB,
 742                        unit->Combine.SourceRGB[1]);
 743          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB,
 744                        unit->Combine.SourceRGB[2]);
 745          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA,
 746                        unit->Combine.SourceA[0]);
 747          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA,
 748                        unit->Combine.SourceA[1]);
 749          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA,
 750                        unit->Combine.SourceA[2]);
 751          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB,
 752                        unit->Combine.OperandRGB[0]);
 753          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB,
 754                        unit->Combine.OperandRGB[1]);
 755          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB,
 756                        unit->Combine.OperandRGB[2]);
 757          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA,
 758                        unit->Combine.OperandA[0]);
 759          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA,
 760                        unit->Combine.OperandA[1]);
 761          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA,
 762                        unit->Combine.OperandA[2]);
 763          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE,
 764                        1 << unit->Combine.ScaleShiftRGB);
 765          _mesa_TexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE,
 766                        1 << unit->Combine.ScaleShiftA);
 767       }
 768
 769       /* Restore texture object state for each target */
 770       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 771          const struct gl_texture_object *obj = NULL;
 772          GLfloat bordColor[4];
 773          GLenum target;
 774
 775          obj = &texstate->SavedObj[u][tgt];
 776
 777          /* don't restore state for unsupported targets to prevent
 778           * raising GL errors.
 779           */
 780          if (obj->Target == GL_TEXTURE_CUBE_MAP_ARB &&
 781              !ctx->Extensions.ARB_texture_cube_map) {
 782             continue;
 783          }
 784          else if (obj->Target == GL_TEXTURE_RECTANGLE_NV &&
 785                   !ctx->Extensions.NV_texture_rectangle) {
 786             continue;
 787          }
 788          else if ((obj->Target == GL_TEXTURE_1D_ARRAY_EXT ||
 789                    obj->Target == GL_TEXTURE_2D_ARRAY_EXT) &&
 790                   !ctx->Extensions.MESA_texture_array) {
 791             continue;
 792          }
 793
 794          target = obj->Target;
 795
 796          _mesa_BindTexture(target, obj->Name);
 797
 798          bordColor[0] = CHAN_TO_FLOAT(obj->BorderColor[0]);
 799          bordColor[1] = CHAN_TO_FLOAT(obj->BorderColor[1]);
 800          bordColor[2] = CHAN_TO_FLOAT(obj->BorderColor[2]);
 801          bordColor[3] = CHAN_TO_FLOAT(obj->BorderColor[3]);
 802
 803          _mesa_TexParameterfv(target, GL_TEXTURE_BORDER_COLOR, bordColor);
 804          _mesa_TexParameterf(target, GL_TEXTURE_PRIORITY, obj->Priority);
 805          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_S, obj->WrapS);
 806          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_T, obj->WrapT);
 807          _mesa_TexParameteri(target, GL_TEXTURE_WRAP_R, obj->WrapR);
 808          _mesa_TexParameteri(target, GL_TEXTURE_MIN_FILTER, obj->MinFilter);
 809          _mesa_TexParameteri(target, GL_TEXTURE_MAG_FILTER, obj->MagFilter);
 810          _mesa_TexParameterf(target, GL_TEXTURE_MIN_LOD, obj->MinLod);
 811          _mesa_TexParameterf(target, GL_TEXTURE_MAX_LOD, obj->MaxLod);
 812          _mesa_TexParameterf(target, GL_TEXTURE_LOD_BIAS, obj->LodBias);
 813          _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, obj->BaseLevel);
 814          if (target != GL_TEXTURE_RECTANGLE_ARB)
 815             _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, obj->MaxLevel);
 816          if (ctx->Extensions.EXT_texture_filter_anisotropic) {
 817             _mesa_TexParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT,
 818                                 obj->MaxAnisotropy);
 819          }
 820          if (ctx->Extensions.SGIX_shadow) {
 821             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_SGIX,
 822                                 obj->CompareFlag);
 823             _mesa_TexParameteri(target, GL_TEXTURE_COMPARE_OPERATOR_SGIX,
 824                                 obj->CompareOperator);
 825          }
 826          if (ctx->Extensions.SGIX_shadow_ambient) {
 827             _mesa_TexParameterf(target, GL_SHADOW_AMBIENT_SGIX,
 828                                 obj->ShadowAmbient);
 829          }
 830       }
 831
 832       /* remove saved references to the texture objects */
 833       for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
 834          _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
 835       }
 836    }
 837
 838    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + texstate->Texture.CurrentUnit);
 839
 840    _mesa_unlock_context_textures(ctx);
 841 }
 842
 843
 844 /*
 845  * This function is kind of long just because we have to call a lot
 846  * of device driver functions to update device driver state.
 847  *
 848  * XXX As it is now, most of the pop-code calls immediate-mode Mesa functions
 849  * in order to restore GL state.  This isn't terribly efficient but it
 850  * ensures that dirty flags and any derived state gets updated correctly.
 851  * We could at least check if the value to restore equals the current value
 852  * and then skip the Mesa call.
 853  */
 854 void GLAPIENTRY
 855 _mesa_PopAttrib(void)
 856 {
 857    struct gl_attrib_node *attr, *next;
 858    GET_CURRENT_CONTEXT(ctx);
 859    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 860
 861    if (ctx->AttribStackDepth == 0) {
 862       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopAttrib" );
 863       return;
 864    }
 865
 866    ctx->AttribStackDepth--;
 867    attr = ctx->AttribStack[ctx->AttribStackDepth];
 868
 869    while (attr) {
 870
 871       if (MESA_VERBOSE & VERBOSE_API) {
 872          _mesa_debug(ctx, "glPopAttrib %s\n",
 873                      _mesa_lookup_enum_by_nr(attr->kind));
 874       }
 875
 876       switch (attr->kind) {
 877          case GL_ACCUM_BUFFER_BIT:
 878             {
 879                const struct gl_accum_attrib *accum;
 880                accum = (const struct gl_accum_attrib *) attr->data;
 881                _mesa_ClearAccum(accum->ClearColor[0],
 882                                 accum->ClearColor[1],
 883                                 accum->ClearColor[2],
 884                                 accum->ClearColor[3]);
 885             }
 886             break;
 887          case GL_COLOR_BUFFER_BIT:
 888             {
 889                const struct gl_colorbuffer_attrib *color;
 890                color = (const struct gl_colorbuffer_attrib *) attr->data;
 891                _mesa_ClearIndex((GLfloat) color->ClearIndex);
 892                _mesa_ClearColor(color->ClearColor[0],
 893                                 color->ClearColor[1],
 894                                 color->ClearColor[2],
 895                                 color->ClearColor[3]);
 896                _mesa_IndexMask(color->IndexMask);
 897                _mesa_ColorMask((GLboolean) (color->ColorMask[0] != 0),
 898                                (GLboolean) (color->ColorMask[1] != 0),
 899                                (GLboolean) (color->ColorMask[2] != 0),
 900                                (GLboolean) (color->ColorMask[3] != 0));
 901                {
 902                   /* Need to determine if more than one color output is
 903                    * specified.  If so, call glDrawBuffersARB, else call
 904                    * glDrawBuffer().  This is a subtle, but essential point
 905                    * since GL_FRONT (for example) is illegal for the former
 906                    * function, but legal for the later.
 907                    */
 908                   GLboolean multipleBuffers = GL_FALSE;
 909                   if (ctx->Extensions.ARB_draw_buffers) {
 910                      GLuint i;
 911                      for (i = 1; i < ctx->Const.MaxDrawBuffers; i++) {
 912                         if (color->DrawBuffer[i] != GL_NONE) {
 913                            multipleBuffers = GL_TRUE;
 914                            break;
 915                         }
 916                      }
 917                   }
 918                   /* Call the API_level functions, not _mesa_drawbuffers()
 919                    * since we need to do error checking on the pop'd
 920                    * GL_DRAW_BUFFER.
 921                    * Ex: if GL_FRONT were pushed, but we're popping with a
 922                    * user FBO bound, GL_FRONT will be illegal and we'll need
 923                    * to record that error.  Per OpenGL ARB decision.
 924                    */
 925                   if (multipleBuffers)
 926                      _mesa_DrawBuffersARB(ctx->Const.MaxDrawBuffers,
 927                                           color->DrawBuffer);
 928                   else
 929                      _mesa_DrawBuffer(color->DrawBuffer[0]);
 930                }
 931                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
 932                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRef);
 933                _mesa_set_enable(ctx, GL_BLEND, color->BlendEnabled);
 934                _mesa_BlendFuncSeparateEXT(color->BlendSrcRGB,
 935                                           color->BlendDstRGB,
 936                                           color->BlendSrcA,
 937                                           color->BlendDstA);
 938                /* This special case is because glBlendEquationSeparateEXT
 939                 * cannot take GL_LOGIC_OP as a parameter.
 940                 */
 941                if ( color->BlendEquationRGB == color->BlendEquationA ) {
 942                   _mesa_BlendEquation(color->BlendEquationRGB);
 943                }
 944                else {
 945                   _mesa_BlendEquationSeparateEXT(color->BlendEquationRGB,
 946                                                  color->BlendEquationA);
 947                }
 948                _mesa_BlendColor(color->BlendColor[0],
 949                                 color->BlendColor[1],
 950                                 color->BlendColor[2],
 951                                 color->BlendColor[3]);
 952                _mesa_LogicOp(color->LogicOp);
 953                _mesa_set_enable(ctx, GL_COLOR_LOGIC_OP,
 954                                 color->ColorLogicOpEnabled);
 955                _mesa_set_enable(ctx, GL_INDEX_LOGIC_OP,
 956                                 color->IndexLogicOpEnabled);
 957                _mesa_set_enable(ctx, GL_DITHER, color->DitherFlag);
 958             }
 959             break;
 960          case GL_CURRENT_BIT:
 961             FLUSH_CURRENT( ctx, 0 );
 962             MEMCPY( &ctx->Current, attr->data,
 963                     sizeof(struct gl_current_attrib) );
 964             break;
 965          case GL_DEPTH_BUFFER_BIT:
 966             {
 967                const struct gl_depthbuffer_attrib *depth;
 968                depth = (const struct gl_depthbuffer_attrib *) attr->data;
 969                _mesa_DepthFunc(depth->Func);
 970                _mesa_ClearDepth(depth->Clear);
 971                _mesa_set_enable(ctx, GL_DEPTH_TEST, depth->Test);
 972                _mesa_DepthMask(depth->Mask);
 973             }
 974             break;
 975          case GL_ENABLE_BIT:
 976             {
 977                const struct gl_enable_attrib *enable;
 978                enable = (const struct gl_enable_attrib *) attr->data;
 979                pop_enable_group(ctx, enable);
 980                ctx->NewState |= _NEW_ALL;
 981             }
 982             break;
 983          case GL_EVAL_BIT:
 984             MEMCPY( &ctx->Eval, attr->data, sizeof(struct gl_eval_attrib) );
 985             ctx->NewState |= _NEW_EVAL;
 986             break;
 987          case GL_FOG_BIT:
 988             {
 989                const struct gl_fog_attrib *fog;
 990                fog = (const struct gl_fog_attrib *) attr->data;
 991                _mesa_set_enable(ctx, GL_FOG, fog->Enabled);
 992                _mesa_Fogfv(GL_FOG_COLOR, fog->Color);
 993                _mesa_Fogf(GL_FOG_DENSITY, fog->Density);
 994                _mesa_Fogf(GL_FOG_START, fog->Start);
 995                _mesa_Fogf(GL_FOG_END, fog->End);
 996                _mesa_Fogf(GL_FOG_INDEX, fog->Index);
 997                _mesa_Fogi(GL_FOG_MODE, fog->Mode);
 998             }
 999             break;
1000          case GL_HINT_BIT:
1001             {
1002                const struct gl_hint_attrib *hint;
1003                hint = (const struct gl_hint_attrib *) attr->data;
1004                _mesa_Hint(GL_PERSPECTIVE_CORRECTION_HINT,
1005                           hint->PerspectiveCorrection );
1006                _mesa_Hint(GL_POINT_SMOOTH_HINT, hint->PointSmooth);
1007                _mesa_Hint(GL_LINE_SMOOTH_HINT, hint->LineSmooth);
1008                _mesa_Hint(GL_POLYGON_SMOOTH_HINT, hint->PolygonSmooth);
1009                _mesa_Hint(GL_FOG_HINT, hint->Fog);
1010                _mesa_Hint(GL_CLIP_VOLUME_CLIPPING_HINT_EXT,
1011                           hint->ClipVolumeClipping);
1012                if (ctx->Extensions.ARB_texture_compression)
1013                   _mesa_Hint(GL_TEXTURE_COMPRESSION_HINT_ARB,
1014                              hint->TextureCompression);
1015             }
1016             break;
1017          case GL_LIGHTING_BIT:
1018             {
1019                GLuint i;
1020                const struct gl_light_attrib *light;
1021                light = (const struct gl_light_attrib *) attr->data;
1022                /* lighting enable */
1023                _mesa_set_enable(ctx, GL_LIGHTING, light->Enabled);
1024                /* per-light state */
1025                if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
1026                   _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
1027
1028                for (i = 0; i < ctx->Const.MaxLights; i++) {
1029                   const struct gl_light *l = &light->Light[i];
1030                   _mesa_set_enable(ctx, GL_LIGHT0 + i, l->Enabled);
1031                   _mesa_light(ctx, i, GL_AMBIENT, l->Ambient);
1032                   _mesa_light(ctx, i, GL_DIFFUSE, l->Diffuse);
1033                   _mesa_light(ctx, i, GL_SPECULAR, l->Specular );
1034                   _mesa_light(ctx, i, GL_POSITION, l->EyePosition);
1035                   _mesa_light(ctx, i, GL_SPOT_DIRECTION, l->EyeDirection);
1036                   _mesa_light(ctx, i, GL_SPOT_EXPONENT, &l->SpotExponent);
1037                   _mesa_light(ctx, i, GL_SPOT_CUTOFF, &l->SpotCutoff);
1038                   _mesa_light(ctx, i, GL_CONSTANT_ATTENUATION,
1039                               &l->ConstantAttenuation);
1040                   _mesa_light(ctx, i, GL_LINEAR_ATTENUATION,
1041                               &l->LinearAttenuation);
1042                   _mesa_light(ctx, i, GL_QUADRATIC_ATTENUATION,
1043                               &l->QuadraticAttenuation);
1044                }
1045                /* light model */
1046                _mesa_LightModelfv(GL_LIGHT_MODEL_AMBIENT,
1047                                   light->Model.Ambient);
1048                _mesa_LightModelf(GL_LIGHT_MODEL_LOCAL_VIEWER,
1049                                  (GLfloat) light->Model.LocalViewer);
1050                _mesa_LightModelf(GL_LIGHT_MODEL_TWO_SIDE,
1051                                  (GLfloat) light->Model.TwoSide);
1052                _mesa_LightModelf(GL_LIGHT_MODEL_COLOR_CONTROL,
1053                                  (GLfloat) light->Model.ColorControl);
1054                /* shade model */
1055                _mesa_ShadeModel(light->ShadeModel);
1056                /* color material */
1057                _mesa_ColorMaterial(light->ColorMaterialFace,
1058                                    light->ColorMaterialMode);
1059                _mesa_set_enable(ctx, GL_COLOR_MATERIAL,
1060                                 light->ColorMaterialEnabled);
1061                /* materials */
1062                MEMCPY(&ctx->Light.Material, &light->Material,
1063                       sizeof(struct gl_material));
1064             }
1065             break;
1066          case GL_LINE_BIT:
1067             {
1068                const struct gl_line_attrib *line;
1069                line = (const struct gl_line_attrib *) attr->data;
1070                _mesa_set_enable(ctx, GL_LINE_SMOOTH, line->SmoothFlag);
1071                _mesa_set_enable(ctx, GL_LINE_STIPPLE, line->StippleFlag);
1072                _mesa_LineStipple(line->StippleFactor, line->StipplePattern);
1073                _mesa_LineWidth(line->Width);
1074             }
1075             break;
1076          case GL_LIST_BIT:
1077             MEMCPY( &ctx->List, attr->data, sizeof(struct gl_list_attrib) );
1078             break;
1079          case GL_PIXEL_MODE_BIT:
1080             MEMCPY( &ctx->Pixel, attr->data, sizeof(struct gl_pixel_attrib) );
1081             /* XXX what other pixel state needs to be set by function calls? */
1082             _mesa_ReadBuffer(ctx->Pixel.ReadBuffer);
1083             ctx->NewState |= _NEW_PIXEL;
1084             break;
1085          case GL_POINT_BIT:
1086             {
1087                const struct gl_point_attrib *point;
1088                point = (const struct gl_point_attrib *) attr->data;
1089                _mesa_PointSize(point->Size);
1090                _mesa_set_enable(ctx, GL_POINT_SMOOTH, point->SmoothFlag);
1091                if (ctx->Extensions.EXT_point_parameters) {
1092                   _mesa_PointParameterfv(GL_DISTANCE_ATTENUATION_EXT,
1093                                          point->Params);
1094                   _mesa_PointParameterf(GL_POINT_SIZE_MIN_EXT,
1095                                         point->MinSize);
1096                   _mesa_PointParameterf(GL_POINT_SIZE_MAX_EXT,
1097                                         point->MaxSize);
1098                   _mesa_PointParameterf(GL_POINT_FADE_THRESHOLD_SIZE_EXT,
1099                                         point->Threshold);
1100                }
1101                if (ctx->Extensions.NV_point_sprite
1102                    || ctx->Extensions.ARB_point_sprite) {
1103                   GLuint u;
1104                   for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1105                      _mesa_TexEnvi(GL_POINT_SPRITE_NV, GL_COORD_REPLACE_NV,
1106                                    (GLint) point->CoordReplace[u]);
1107                   }
1108                   _mesa_set_enable(ctx, GL_POINT_SPRITE_NV,point->PointSprite);
1109                   if (ctx->Extensions.NV_point_sprite)
1110                      _mesa_PointParameteri(GL_POINT_SPRITE_R_MODE_NV,
1111                                            ctx->Point.SpriteRMode);
1112                   _mesa_PointParameterf(GL_POINT_SPRITE_COORD_ORIGIN,
1113                                         (GLfloat)ctx->Point.SpriteOrigin);
1114                }
1115             }
1116             break;
1117          case GL_POLYGON_BIT:
1118             {
1119                const struct gl_polygon_attrib *polygon;
1120                polygon = (const struct gl_polygon_attrib *) attr->data;
1121                _mesa_CullFace(polygon->CullFaceMode);
1122                _mesa_FrontFace(polygon->FrontFace);
1123                _mesa_PolygonMode(GL_FRONT, polygon->FrontMode);
1124                _mesa_PolygonMode(GL_BACK, polygon->BackMode);
1125                _mesa_PolygonOffset(polygon->OffsetFactor,
1126                                    polygon->OffsetUnits);
1127                _mesa_set_enable(ctx, GL_POLYGON_SMOOTH, polygon->SmoothFlag);
1128                _mesa_set_enable(ctx, GL_POLYGON_STIPPLE, polygon->StippleFlag);
1129                _mesa_set_enable(ctx, GL_CULL_FACE, polygon->CullFlag);
1130                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_POINT,
1131                                 polygon->OffsetPoint);
1132                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_LINE,
1133                                 polygon->OffsetLine);
1134                _mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL,
1135                                 polygon->OffsetFill);
1136             }
1137             break;
1138          case GL_POLYGON_STIPPLE_BIT:
1139             MEMCPY( ctx->PolygonStipple, attr->data, 32*sizeof(GLuint) );
1140             ctx->NewState |= _NEW_POLYGONSTIPPLE;
1141             if (ctx->Driver.PolygonStipple)
1142                ctx->Driver.PolygonStipple( ctx, (const GLubyte *) attr->data );
1143             break;
1144          case GL_SCISSOR_BIT:
1145             {
1146                const struct gl_scissor_attrib *scissor;
1147                scissor = (const struct gl_scissor_attrib *) attr->data;
1148                _mesa_Scissor(scissor->X, scissor->Y,
1149                              scissor->Width, scissor->Height);
1150                _mesa_set_enable(ctx, GL_SCISSOR_TEST, scissor->Enabled);
1151             }
1152             break;
1153          case GL_STENCIL_BUFFER_BIT:
1154             {
1155                const struct gl_stencil_attrib *stencil;
1156                stencil = (const struct gl_stencil_attrib *) attr->data;
1157                _mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
1158                _mesa_ClearStencil(stencil->Clear);
1159                if (ctx->Extensions.EXT_stencil_two_side) {
1160                   _mesa_set_enable(ctx, GL_STENCIL_TEST_TWO_SIDE_EXT,
1161                                    stencil->TestTwoSide);
1162                   _mesa_ActiveStencilFaceEXT(stencil->ActiveFace
1163                                              ? GL_BACK : GL_FRONT);
1164                }
1165                /* front state */
1166                _mesa_StencilFuncSeparate(GL_FRONT,
1167                                          stencil->Function[0],
1168                                          stencil->Ref[0],
1169                                          stencil->ValueMask[0]);
1170                _mesa_StencilMaskSeparate(GL_FRONT, stencil->WriteMask[0]);
1171                _mesa_StencilOpSeparate(GL_FRONT, stencil->FailFunc[0],
1172                                        stencil->ZFailFunc[0],
1173                                        stencil->ZPassFunc[0]);
1174                /* back state */
1175                _mesa_StencilFuncSeparate(GL_BACK,
1176                                          stencil->Function[1],
1177                                          stencil->Ref[1],
1178                                          stencil->ValueMask[1]);
1179                _mesa_StencilMaskSeparate(GL_BACK, stencil->WriteMask[1]);
1180                _mesa_StencilOpSeparate(GL_BACK, stencil->FailFunc[1],
1181                                        stencil->ZFailFunc[1],
1182                                        stencil->ZPassFunc[1]);
1183             }
1184             break;
1185          case GL_TRANSFORM_BIT:
1186             {
1187                GLuint i;
1188                const struct gl_transform_attrib *xform;
1189                xform = (const struct gl_transform_attrib *) attr->data;
1190                _mesa_MatrixMode(xform->MatrixMode);
1191                if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
1192                   _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
1193
1194                /* restore clip planes */
1195                for (i = 0; i < MAX_CLIP_PLANES; i++) {
1196                   const GLuint mask = 1 << 1;
1197                   const GLfloat *eyePlane = xform->EyeUserPlane[i];
1198                   COPY_4V(ctx->Transform.EyeUserPlane[i], eyePlane);
1199                   if (xform->ClipPlanesEnabled & mask) {
1200                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
1201                   }
1202                   else {
1203                      _mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
1204                   }
1205                   if (ctx->Driver.ClipPlane)
1206                      ctx->Driver.ClipPlane( ctx, GL_CLIP_PLANE0 + i, eyePlane );
1207                }
1208
1209                /* normalize/rescale */
1210                if (xform->Normalize != ctx->Transform.Normalize)
1211                   _mesa_set_enable(ctx, GL_NORMALIZE,ctx->Transform.Normalize);
1212                if (xform->RescaleNormals != ctx->Transform.RescaleNormals)
1213                   _mesa_set_enable(ctx, GL_RESCALE_NORMAL_EXT,
1214                                    ctx->Transform.RescaleNormals);
1215             }
1216             break;
1217          case GL_TEXTURE_BIT:
1218             /* Take care of texture object reference counters */
1219             {
1220                struct texture_state *texstate
1221                   = (struct texture_state *) attr->data;
1222                pop_texture_group(ctx, texstate);
1223                ctx->NewState |= _NEW_TEXTURE;
1224             }
1225             break;
1226          case GL_VIEWPORT_BIT:
1227             {
1228                const struct gl_viewport_attrib *vp;
1229                vp = (const struct gl_viewport_attrib *) attr->data;
1230                _mesa_Viewport(vp->X, vp->Y, vp->Width, vp->Height);
1231                _mesa_DepthRange(vp->Near, vp->Far);
1232             }
1233             break;
1234          case GL_MULTISAMPLE_BIT_ARB:
1235             {
1236                const struct gl_multisample_attrib *ms;
1237                ms = (const struct gl_multisample_attrib *) attr->data;
1238                _mesa_SampleCoverageARB(ms->SampleCoverageValue,
1239                                        ms->SampleCoverageInvert);
1240             }
1241             break;
1242
1243          default:
1244             _mesa_problem( ctx, "Bad attrib flag in PopAttrib");
1245             break;
1246       }
1247
1248       next = attr->next;
1249       FREE( attr->data );
1250       FREE( attr );
1251       attr = next;
1252    }
1253 }
1254
1255
1256 /**
1257  * Helper for incrementing/decrementing vertex buffer object reference
1258  * counts when pushing/popping the GL_CLIENT_VERTEX_ARRAY_BIT attribute group.
1259  */
1260 static void
1261 adjust_buffer_object_ref_counts(struct gl_array_attrib *array, GLint step)
1262 {
1263    GLuint i;
1264    array->ArrayObj->Vertex.BufferObj->RefCount += step;
1265    array->ArrayObj->Normal.BufferObj->RefCount += step;
1266    array->ArrayObj->Color.BufferObj->RefCount += step;
1267    array->ArrayObj->SecondaryColor.BufferObj->RefCount += step;
1268    array->ArrayObj->FogCoord.BufferObj->RefCount += step;
1269    array->ArrayObj->Index.BufferObj->RefCount += step;
1270    array->ArrayObj->EdgeFlag.BufferObj->RefCount += step;
1271    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
1272       array->ArrayObj->TexCoord[i].BufferObj->RefCount += step;
1273    for (i = 0; i < VERT_ATTRIB_MAX; i++)
1274       array->ArrayObj->VertexAttrib[i].BufferObj->RefCount += step;
1275
1276    array->ArrayBufferObj->RefCount += step;
1277    array->ElementArrayBufferObj->RefCount += step;
1278 }
1279
1280
1281 /**
1282  * Copy gl_pixelstore_attrib from src to dst, updating buffer
1283  * object refcounts.
1284  */
1285 static void
1286 copy_pixelstore(GLcontext *ctx,
1287                 struct gl_pixelstore_attrib *dst,
1288                 const struct gl_pixelstore_attrib *src)
1289 {
1290    dst->Alignment = src->Alignment;
1291    dst->RowLength = src->RowLength;
1292    dst->SkipPixels = src->SkipPixels;
1293    dst->SkipRows = src->SkipRows;
1294    dst->ImageHeight = src->ImageHeight;
1295    dst->SkipImages = src->SkipImages;
1296    dst->SwapBytes = src->SwapBytes;
1297    dst->LsbFirst = src->LsbFirst;
1298    dst->ClientStorage = src->ClientStorage;
1299    dst->Invert = src->Invert;
1300    _mesa_reference_buffer_object(ctx, &dst->BufferObj, src->BufferObj);
1301 }
1302
1303
1304 #define GL_CLIENT_PACK_BIT (1<<20)
1305 #define GL_CLIENT_UNPACK_BIT (1<<21)
1306
1307
1308 void GLAPIENTRY
1309 _mesa_PushClientAttrib(GLbitfield mask)
1310 {
1311    struct gl_attrib_node *newnode;
1312    struct gl_attrib_node *head;
1313
1314    GET_CURRENT_CONTEXT(ctx);
1315    ASSERT_OUTSIDE_BEGIN_END(ctx);
1316
1317    if (ctx->ClientAttribStackDepth >= MAX_CLIENT_ATTRIB_STACK_DEPTH) {
1318       _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushClientAttrib" );
1319       return;
1320    }
1321
1322    /* Build linked list of attribute nodes which save all attribute
1323     * groups specified by the mask.
1324     */
1325    head = NULL;
1326
1327    if (mask & GL_CLIENT_PIXEL_STORE_BIT) {
1328       struct gl_pixelstore_attrib *attr;
1329       /* packing attribs */
1330       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1331       copy_pixelstore(ctx, attr, &ctx->Pack);
1332       newnode = new_attrib_node( GL_CLIENT_PACK_BIT );
1333       newnode->data = attr;
1334       newnode->next = head;
1335       head = newnode;
1336       /* unpacking attribs */
1337       attr = CALLOC_STRUCT( gl_pixelstore_attrib );
1338       copy_pixelstore(ctx, attr, &ctx->Unpack);
1339       newnode = new_attrib_node( GL_CLIENT_UNPACK_BIT );
1340       newnode->data = attr;
1341       newnode->next = head;
1342       head = newnode;
1343    }
1344
1345    if (mask & GL_CLIENT_VERTEX_ARRAY_BIT) {
1346       struct gl_array_attrib *attr;
1347       struct gl_array_object *obj;
1348
1349       attr = MALLOC_STRUCT( gl_array_attrib );
1350       obj = MALLOC_STRUCT( gl_array_object );
1351
1352 #if FEATURE_ARB_vertex_buffer_object
1353       /* increment ref counts since we're copying pointers to these objects */
1354       ctx->Array.ArrayBufferObj->RefCount++;
1355       ctx->Array.ElementArrayBufferObj->RefCount++;
1356 #endif
1357
1358       MEMCPY( attr, &ctx->Array, sizeof(struct gl_array_attrib) );
1359       MEMCPY( obj, ctx->Array.ArrayObj, sizeof(struct gl_array_object) );
1360
1361       attr->ArrayObj = obj;
1362
1363       newnode = new_attrib_node( GL_CLIENT_VERTEX_ARRAY_BIT );
1364       newnode->data = attr;
1365       newnode->next = head;
1366       head = newnode;
1367       /* bump reference counts on buffer objects */
1368       adjust_buffer_object_ref_counts(&ctx->Array, 1);
1369    }
1370
1371    ctx->ClientAttribStack[ctx->ClientAttribStackDepth] = head;
1372    ctx->ClientAttribStackDepth++;
1373 }
1374
1375
1376
1377
1378 void GLAPIENTRY
1379 _mesa_PopClientAttrib(void)
1380 {
1381    struct gl_attrib_node *node, *next;
1382
1383    GET_CURRENT_CONTEXT(ctx);
1384    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
1385
1386    if (ctx->ClientAttribStackDepth == 0) {
1387       _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopClientAttrib" );
1388       return;
1389    }
1390
1391    ctx->ClientAttribStackDepth--;
1392    node = ctx->ClientAttribStack[ctx->ClientAttribStackDepth];
1393
1394    while (node) {
1395       switch (node->kind) {
1396          case GL_CLIENT_PACK_BIT:
1397             {
1398                struct gl_pixelstore_attrib *store =
1399                   (struct gl_pixelstore_attrib *) node->data;
1400                copy_pixelstore(ctx, &ctx->Pack, store);
1401                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1402             }
1403             ctx->NewState |= _NEW_PACKUNPACK;
1404             break;
1405          case GL_CLIENT_UNPACK_BIT:
1406             {
1407                struct gl_pixelstore_attrib *store =
1408                   (struct gl_pixelstore_attrib *) node->data;
1409                copy_pixelstore(ctx, &ctx->Unpack, store);
1410                _mesa_reference_buffer_object(ctx, &store->BufferObj, NULL);
1411             }
1412             ctx->NewState |= _NEW_PACKUNPACK;
1413             break;
1414          case GL_CLIENT_VERTEX_ARRAY_BIT: {
1415             struct gl_array_attrib * data =
1416               (struct gl_array_attrib *) node->data;
1417
1418             adjust_buffer_object_ref_counts(&ctx->Array, -1);
1419
1420             ctx->Array.ActiveTexture = data->ActiveTexture;
1421             if (data->LockCount != 0)
1422                _mesa_LockArraysEXT(data->LockFirst, data->LockCount);
1423             else if (ctx->Array.LockCount)
1424                _mesa_UnlockArraysEXT();
1425
1426             _mesa_BindVertexArrayAPPLE( data->ArrayObj->Name );
1427
1428 #if FEATURE_ARB_vertex_buffer_object
1429             _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
1430                                 data->ArrayBufferObj->Name);
1431             _mesa_BindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
1432                                 data->ElementArrayBufferObj->Name);
1433 #endif
1434
1435             MEMCPY( ctx->Array.ArrayObj, data->ArrayObj,
1436                     sizeof( struct gl_array_object ) );
1437
1438             FREE( data->ArrayObj );
1439
1440             /* FIXME: Should some bits in ctx->Array->NewState also be set
1441              * FIXME: here?  It seems like it should be set to inclusive-or
1442              * FIXME: of the old ArrayObj->_Enabled and the new _Enabled.
1443              */
1444
1445             ctx->NewState |= _NEW_ARRAY;
1446             break;
1447          }
1448          default:
1449             _mesa_problem( ctx, "Bad attrib flag in PopClientAttrib");
1450             break;
1451       }
1452
1453       next = node->next;
1454       FREE( node->data );
1455       FREE( node );
1456       node = next;
1457    }
1458 }
1459
1460
1461 /**
1462  * Free any attribute state data that might be attached to the context.
1463  */
1464 void
1465 _mesa_free_attrib_data(GLcontext *ctx)
1466 {
1467    while (ctx->AttribStackDepth > 0) {
1468       struct gl_attrib_node *attr, *next;
1469
1470       ctx->AttribStackDepth--;
1471       attr = ctx->AttribStack[ctx->AttribStackDepth];
1472
1473       while (attr) {
1474          if (attr->kind == GL_TEXTURE_BIT) {
1475             struct texture_state *texstate = (struct texture_state*)attr->data;
1476             GLuint u, tgt;
1477             /* clear references to the saved texture objects */
1478             for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
1479                for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
1480                   _mesa_reference_texobj(&texstate->SavedTexRef[u][tgt], NULL);
1481                }
1482             }
1483          }
1484          else {
1485             /* any other chunks of state that requires special handling? */
1486          }
1487
1488          next = attr->next;
1489          _mesa_free(attr->data);
1490          _mesa_free(attr);
1491          attr = next;
1492       }
1493    }
1494 }
1495
1496
1497 void _mesa_init_attrib( GLcontext *ctx )
1498 {
1499    /* Renderer and client attribute stacks */
1500    ctx->AttribStackDepth = 0;
1501    ctx->ClientAttribStackDepth = 0;
1502 }