src/mesa/main/state.c

   1 /* $Id: state.c,v 1.97 2002/11/06 15:16:23 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  5.0
   6  *
   7  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /*
  29  * This file manages recalculation of derived values in the
  30  * __GLcontext.
  31  */
  32
  33
  34 #include "glheader.h"
  35 #include "accum.h"
  36 #include "api_loopback.h"
  37 #include "attrib.h"
  38 #include "blend.h"
  39 #include "buffers.h"
  40 #include "clip.h"
  41 #include "colortab.h"
  42 #include "context.h"
  43 #include "convolve.h"
  44 #include "depth.h"
  45 #include "dlist.h"
  46 #include "drawpix.h"
  47 #include "enable.h"
  48 #include "eval.h"
  49 #include "get.h"
  50 #include "feedback.h"
  51 #include "fog.h"
  52 #include "hint.h"
  53 #include "histogram.h"
  54 #include "light.h"
  55 #include "lines.h"
  56 #include "matrix.h"
  57 #include "mmath.h"
  58 #include "pixel.h"
  59 #include "points.h"
  60 #include "polygon.h"
  61 #include "rastpos.h"
  62 #include "state.h"
  63 #include "stencil.h"
  64 #include "teximage.h"
  65 #include "texobj.h"
  66 #include "texstate.h"
  67 #include "mtypes.h"
  68 #include "varray.h"
  69 #if FEATURE_NV_vertex_program
  70 #include "vpstate.h"
  71 #endif
  72
  73 #include "math/m_matrix.h"
  74 #include "math/m_xform.h"
  75
  76
  77 static int
  78 generic_noop(void)
  79 {
  80 #ifdef DEBUG
  81    _mesa_problem(NULL, "User called no-op dispatch function");
  82 #endif
  83    return 0;
  84 }
  85
  86
  87 /*
  88  * Set all pointers in the given dispatch table to point to a
  89  * generic no-op function.
  90  */
  91 void
  92 _mesa_init_no_op_table(struct _glapi_table *table, GLuint tableSize)
  93 {
  94    GLuint i;
  95    void **dispatch = (void **) table;
  96    for (i = 0; i < tableSize; i++) {
  97       dispatch[i] = (void *) generic_noop;
  98    }
  99 }
 100
 101
 102
 103 /*
 104  * Initialize the given dispatch table with pointers to Mesa's
 105  * immediate-mode commands.
 106  *
 107  * Pointers to begin/end object commands and a few others
 108  * are provided via the vtxfmt interface elsewhere.
 109  */
 110 void
 111 _mesa_init_exec_table(struct _glapi_table *exec, GLuint tableSize)
 112 {
 113    /* first initialize all dispatch slots to no-op */
 114    _mesa_init_no_op_table(exec, tableSize);
 115
 116    _mesa_loopback_init_api_table( exec, GL_TRUE );
 117
 118    /* load the dispatch slots we understand */
 119    exec->Accum = _mesa_Accum;
 120    exec->AlphaFunc = _mesa_AlphaFunc;
 121    exec->Bitmap = _mesa_Bitmap;
 122    exec->BlendFunc = _mesa_BlendFunc;
 123    exec->CallList = _mesa_CallList;
 124    exec->CallLists = _mesa_CallLists;
 125    exec->Clear = _mesa_Clear;
 126    exec->ClearAccum = _mesa_ClearAccum;
 127    exec->ClearColor = _mesa_ClearColor;
 128    exec->ClearDepth = _mesa_ClearDepth;
 129    exec->ClearIndex = _mesa_ClearIndex;
 130    exec->ClearStencil = _mesa_ClearStencil;
 131    exec->ClipPlane = _mesa_ClipPlane;
 132    exec->ColorMask = _mesa_ColorMask;
 133    exec->ColorMaterial = _mesa_ColorMaterial;
 134    exec->CopyPixels = _mesa_CopyPixels;
 135    exec->CullFace = _mesa_CullFace;
 136    exec->DeleteLists = _mesa_DeleteLists;
 137    exec->DepthFunc = _mesa_DepthFunc;
 138    exec->DepthMask = _mesa_DepthMask;
 139    exec->DepthRange = _mesa_DepthRange;
 140    exec->Disable = _mesa_Disable;
 141    exec->DrawBuffer = _mesa_DrawBuffer;
 142    exec->DrawPixels = _mesa_DrawPixels;
 143    exec->Enable = _mesa_Enable;
 144    exec->EndList = _mesa_EndList;
 145    exec->FeedbackBuffer = _mesa_FeedbackBuffer;
 146    exec->Finish = _mesa_Finish;
 147    exec->Flush = _mesa_Flush;
 148    exec->FogCoordPointerEXT = _mesa_FogCoordPointerEXT;
 149    exec->Fogf = _mesa_Fogf;
 150    exec->Fogfv = _mesa_Fogfv;
 151    exec->Fogi = _mesa_Fogi;
 152    exec->Fogiv = _mesa_Fogiv;
 153    exec->FrontFace = _mesa_FrontFace;
 154    exec->Frustum = _mesa_Frustum;
 155    exec->GenLists = _mesa_GenLists;
 156    exec->GetBooleanv = _mesa_GetBooleanv;
 157    exec->GetClipPlane = _mesa_GetClipPlane;
 158    exec->GetDoublev = _mesa_GetDoublev;
 159    exec->GetError = _mesa_GetError;
 160    exec->GetFloatv = _mesa_GetFloatv;
 161    exec->GetIntegerv = _mesa_GetIntegerv;
 162    exec->GetLightfv = _mesa_GetLightfv;
 163    exec->GetLightiv = _mesa_GetLightiv;
 164    exec->GetMapdv = _mesa_GetMapdv;
 165    exec->GetMapfv = _mesa_GetMapfv;
 166    exec->GetMapiv = _mesa_GetMapiv;
 167    exec->GetMaterialfv = _mesa_GetMaterialfv;
 168    exec->GetMaterialiv = _mesa_GetMaterialiv;
 169    exec->GetPixelMapfv = _mesa_GetPixelMapfv;
 170    exec->GetPixelMapuiv = _mesa_GetPixelMapuiv;
 171    exec->GetPixelMapusv = _mesa_GetPixelMapusv;
 172    exec->GetPolygonStipple = _mesa_GetPolygonStipple;
 173    exec->GetString = _mesa_GetString;
 174    exec->GetTexEnvfv = _mesa_GetTexEnvfv;
 175    exec->GetTexEnviv = _mesa_GetTexEnviv;
 176    exec->GetTexGendv = _mesa_GetTexGendv;
 177    exec->GetTexGenfv = _mesa_GetTexGenfv;
 178    exec->GetTexGeniv = _mesa_GetTexGeniv;
 179    exec->GetTexImage = _mesa_GetTexImage;
 180    exec->GetTexLevelParameterfv = _mesa_GetTexLevelParameterfv;
 181    exec->GetTexLevelParameteriv = _mesa_GetTexLevelParameteriv;
 182    exec->GetTexParameterfv = _mesa_GetTexParameterfv;
 183    exec->GetTexParameteriv = _mesa_GetTexParameteriv;
 184    exec->Hint = _mesa_Hint;
 185    exec->IndexMask = _mesa_IndexMask;
 186    exec->InitNames = _mesa_InitNames;
 187    exec->IsEnabled = _mesa_IsEnabled;
 188    exec->IsList = _mesa_IsList;
 189    exec->LightModelf = _mesa_LightModelf;
 190    exec->LightModelfv = _mesa_LightModelfv;
 191    exec->LightModeli = _mesa_LightModeli;
 192    exec->LightModeliv = _mesa_LightModeliv;
 193    exec->Lightf = _mesa_Lightf;
 194    exec->Lightfv = _mesa_Lightfv;
 195    exec->Lighti = _mesa_Lighti;
 196    exec->Lightiv = _mesa_Lightiv;
 197    exec->LineStipple = _mesa_LineStipple;
 198    exec->LineWidth = _mesa_LineWidth;
 199    exec->ListBase = _mesa_ListBase;
 200    exec->LoadIdentity = _mesa_LoadIdentity;
 201    exec->LoadMatrixd = _mesa_LoadMatrixd;
 202    exec->LoadMatrixf = _mesa_LoadMatrixf;
 203    exec->LoadName = _mesa_LoadName;
 204    exec->LogicOp = _mesa_LogicOp;
 205    exec->Map1d = _mesa_Map1d;
 206    exec->Map1f = _mesa_Map1f;
 207    exec->Map2d = _mesa_Map2d;
 208    exec->Map2f = _mesa_Map2f;
 209    exec->MapGrid1d = _mesa_MapGrid1d;
 210    exec->MapGrid1f = _mesa_MapGrid1f;
 211    exec->MapGrid2d = _mesa_MapGrid2d;
 212    exec->MapGrid2f = _mesa_MapGrid2f;
 213    exec->MatrixMode = _mesa_MatrixMode;
 214    exec->MultMatrixd = _mesa_MultMatrixd;
 215    exec->MultMatrixf = _mesa_MultMatrixf;
 216    exec->NewList = _mesa_NewList;
 217    exec->Ortho = _mesa_Ortho;
 218    exec->PassThrough = _mesa_PassThrough;
 219    exec->PixelMapfv = _mesa_PixelMapfv;
 220    exec->PixelMapuiv = _mesa_PixelMapuiv;
 221    exec->PixelMapusv = _mesa_PixelMapusv;
 222    exec->PixelStoref = _mesa_PixelStoref;
 223    exec->PixelStorei = _mesa_PixelStorei;
 224    exec->PixelTransferf = _mesa_PixelTransferf;
 225    exec->PixelTransferi = _mesa_PixelTransferi;
 226    exec->PixelZoom = _mesa_PixelZoom;
 227    exec->PointSize = _mesa_PointSize;
 228    exec->PolygonMode = _mesa_PolygonMode;
 229    exec->PolygonOffset = _mesa_PolygonOffset;
 230    exec->PolygonStipple = _mesa_PolygonStipple;
 231    exec->PopAttrib = _mesa_PopAttrib;
 232    exec->PopMatrix = _mesa_PopMatrix;
 233    exec->PopName = _mesa_PopName;
 234    exec->PushAttrib = _mesa_PushAttrib;
 235    exec->PushMatrix = _mesa_PushMatrix;
 236    exec->PushName = _mesa_PushName;
 237    exec->RasterPos2d = _mesa_RasterPos2d;
 238    exec->RasterPos2dv = _mesa_RasterPos2dv;
 239    exec->RasterPos2f = _mesa_RasterPos2f;
 240    exec->RasterPos2fv = _mesa_RasterPos2fv;
 241    exec->RasterPos2i = _mesa_RasterPos2i;
 242    exec->RasterPos2iv = _mesa_RasterPos2iv;
 243    exec->RasterPos2s = _mesa_RasterPos2s;
 244    exec->RasterPos2sv = _mesa_RasterPos2sv;
 245    exec->RasterPos3d = _mesa_RasterPos3d;
 246    exec->RasterPos3dv = _mesa_RasterPos3dv;
 247    exec->RasterPos3f = _mesa_RasterPos3f;
 248    exec->RasterPos3fv = _mesa_RasterPos3fv;
 249    exec->RasterPos3i = _mesa_RasterPos3i;
 250    exec->RasterPos3iv = _mesa_RasterPos3iv;
 251    exec->RasterPos3s = _mesa_RasterPos3s;
 252    exec->RasterPos3sv = _mesa_RasterPos3sv;
 253    exec->RasterPos4d = _mesa_RasterPos4d;
 254    exec->RasterPos4dv = _mesa_RasterPos4dv;
 255    exec->RasterPos4f = _mesa_RasterPos4f;
 256    exec->RasterPos4fv = _mesa_RasterPos4fv;
 257    exec->RasterPos4i = _mesa_RasterPos4i;
 258    exec->RasterPos4iv = _mesa_RasterPos4iv;
 259    exec->RasterPos4s = _mesa_RasterPos4s;
 260    exec->RasterPos4sv = _mesa_RasterPos4sv;
 261    exec->ReadBuffer = _mesa_ReadBuffer;
 262    exec->ReadPixels = _mesa_ReadPixels;
 263    exec->RenderMode = _mesa_RenderMode;
 264    exec->Rotated = _mesa_Rotated;
 265    exec->Rotatef = _mesa_Rotatef;
 266    exec->Scaled = _mesa_Scaled;
 267    exec->Scalef = _mesa_Scalef;
 268    exec->Scissor = _mesa_Scissor;
 269    exec->SecondaryColorPointerEXT = _mesa_SecondaryColorPointerEXT;
 270    exec->SelectBuffer = _mesa_SelectBuffer;
 271    exec->ShadeModel = _mesa_ShadeModel;
 272    exec->StencilFunc = _mesa_StencilFunc;
 273    exec->StencilMask = _mesa_StencilMask;
 274    exec->StencilOp = _mesa_StencilOp;
 275    exec->TexEnvf = _mesa_TexEnvf;
 276    exec->TexEnvfv = _mesa_TexEnvfv;
 277    exec->TexEnvi = _mesa_TexEnvi;
 278    exec->TexEnviv = _mesa_TexEnviv;
 279    exec->TexGend = _mesa_TexGend;
 280    exec->TexGendv = _mesa_TexGendv;
 281    exec->TexGenf = _mesa_TexGenf;
 282    exec->TexGenfv = _mesa_TexGenfv;
 283    exec->TexGeni = _mesa_TexGeni;
 284    exec->TexGeniv = _mesa_TexGeniv;
 285    exec->TexImage1D = _mesa_TexImage1D;
 286    exec->TexImage2D = _mesa_TexImage2D;
 287    exec->TexParameterf = _mesa_TexParameterf;
 288    exec->TexParameterfv = _mesa_TexParameterfv;
 289    exec->TexParameteri = _mesa_TexParameteri;
 290    exec->TexParameteriv = _mesa_TexParameteriv;
 291    exec->Translated = _mesa_Translated;
 292    exec->Translatef = _mesa_Translatef;
 293    exec->Viewport = _mesa_Viewport;
 294
 295    /* 1.1 */
 296    exec->AreTexturesResident = _mesa_AreTexturesResident;
 297    exec->AreTexturesResidentEXT = _mesa_AreTexturesResident;
 298    exec->BindTexture = _mesa_BindTexture;
 299    exec->ColorPointer = _mesa_ColorPointer;
 300    exec->CopyTexImage1D = _mesa_CopyTexImage1D;
 301    exec->CopyTexImage2D = _mesa_CopyTexImage2D;
 302    exec->CopyTexSubImage1D = _mesa_CopyTexSubImage1D;
 303    exec->CopyTexSubImage2D = _mesa_CopyTexSubImage2D;
 304    exec->DeleteTextures = _mesa_DeleteTextures;
 305    exec->DisableClientState = _mesa_DisableClientState;
 306    exec->EdgeFlagPointer = _mesa_EdgeFlagPointer;
 307    exec->EnableClientState = _mesa_EnableClientState;
 308    exec->GenTextures = _mesa_GenTextures;
 309    exec->GenTexturesEXT = _mesa_GenTextures;
 310    exec->GetPointerv = _mesa_GetPointerv;
 311    exec->IndexPointer = _mesa_IndexPointer;
 312    exec->InterleavedArrays = _mesa_InterleavedArrays;
 313    exec->IsTexture = _mesa_IsTexture;
 314    exec->IsTextureEXT = _mesa_IsTexture;
 315    exec->NormalPointer = _mesa_NormalPointer;
 316    exec->PopClientAttrib = _mesa_PopClientAttrib;
 317    exec->PrioritizeTextures = _mesa_PrioritizeTextures;
 318    exec->PushClientAttrib = _mesa_PushClientAttrib;
 319    exec->TexCoordPointer = _mesa_TexCoordPointer;
 320    exec->TexSubImage1D = _mesa_TexSubImage1D;
 321    exec->TexSubImage2D = _mesa_TexSubImage2D;
 322    exec->VertexPointer = _mesa_VertexPointer;
 323
 324    /* 1.2 */
 325    exec->CopyTexSubImage3D = _mesa_CopyTexSubImage3D;
 326    exec->TexImage3D = _mesa_TexImage3D;
 327    exec->TexSubImage3D = _mesa_TexSubImage3D;
 328
 329    /* OpenGL 1.2  GL_ARB_imaging */
 330    exec->BlendColor = _mesa_BlendColor;
 331    exec->BlendEquation = _mesa_BlendEquation;
 332    exec->ColorSubTable = _mesa_ColorSubTable;
 333    exec->ColorTable = _mesa_ColorTable;
 334    exec->ColorTableParameterfv = _mesa_ColorTableParameterfv;
 335    exec->ColorTableParameteriv = _mesa_ColorTableParameteriv;
 336    exec->ConvolutionFilter1D = _mesa_ConvolutionFilter1D;
 337    exec->ConvolutionFilter2D = _mesa_ConvolutionFilter2D;
 338    exec->ConvolutionParameterf = _mesa_ConvolutionParameterf;
 339    exec->ConvolutionParameterfv = _mesa_ConvolutionParameterfv;
 340    exec->ConvolutionParameteri = _mesa_ConvolutionParameteri;
 341    exec->ConvolutionParameteriv = _mesa_ConvolutionParameteriv;
 342    exec->CopyColorSubTable = _mesa_CopyColorSubTable;
 343    exec->CopyColorTable = _mesa_CopyColorTable;
 344    exec->CopyConvolutionFilter1D = _mesa_CopyConvolutionFilter1D;
 345    exec->CopyConvolutionFilter2D = _mesa_CopyConvolutionFilter2D;
 346    exec->GetColorTable = _mesa_GetColorTable;
 347    exec->GetColorTableEXT = _mesa_GetColorTable;
 348    exec->GetColorTableParameterfv = _mesa_GetColorTableParameterfv;
 349    exec->GetColorTableParameterfvEXT = _mesa_GetColorTableParameterfv;
 350    exec->GetColorTableParameteriv = _mesa_GetColorTableParameteriv;
 351    exec->GetColorTableParameterivEXT = _mesa_GetColorTableParameteriv;
 352    exec->GetConvolutionFilter = _mesa_GetConvolutionFilter;
 353    exec->GetConvolutionFilterEXT = _mesa_GetConvolutionFilter;
 354    exec->GetConvolutionParameterfv = _mesa_GetConvolutionParameterfv;
 355    exec->GetConvolutionParameterfvEXT = _mesa_GetConvolutionParameterfv;
 356    exec->GetConvolutionParameteriv = _mesa_GetConvolutionParameteriv;
 357    exec->GetConvolutionParameterivEXT = _mesa_GetConvolutionParameteriv;
 358    exec->GetHistogram = _mesa_GetHistogram;
 359    exec->GetHistogramEXT = _mesa_GetHistogram;
 360    exec->GetHistogramParameterfv = _mesa_GetHistogramParameterfv;
 361    exec->GetHistogramParameterfvEXT = _mesa_GetHistogramParameterfv;
 362    exec->GetHistogramParameteriv = _mesa_GetHistogramParameteriv;
 363    exec->GetHistogramParameterivEXT = _mesa_GetHistogramParameteriv;
 364    exec->GetMinmax = _mesa_GetMinmax;
 365    exec->GetMinmaxEXT = _mesa_GetMinmax;
 366    exec->GetMinmaxParameterfv = _mesa_GetMinmaxParameterfv;
 367    exec->GetMinmaxParameterfvEXT = _mesa_GetMinmaxParameterfv;
 368    exec->GetMinmaxParameteriv = _mesa_GetMinmaxParameteriv;
 369    exec->GetMinmaxParameterivEXT = _mesa_GetMinmaxParameteriv;
 370    exec->GetSeparableFilter = _mesa_GetSeparableFilter;
 371    exec->GetSeparableFilterEXT = _mesa_GetSeparableFilter;
 372    exec->Histogram = _mesa_Histogram;
 373    exec->Minmax = _mesa_Minmax;
 374    exec->ResetHistogram = _mesa_ResetHistogram;
 375    exec->ResetMinmax = _mesa_ResetMinmax;
 376    exec->SeparableFilter2D = _mesa_SeparableFilter2D;
 377
 378    /* 2. GL_EXT_blend_color */
 379 #if 0
 380    exec->BlendColorEXT = _mesa_BlendColorEXT;
 381 #endif
 382
 383    /* 3. GL_EXT_polygon_offset */
 384    exec->PolygonOffsetEXT = _mesa_PolygonOffsetEXT;
 385
 386    /* 6. GL_EXT_texture3d */
 387 #if 0
 388    exec->CopyTexSubImage3DEXT = _mesa_CopyTexSubImage3D;
 389    exec->TexImage3DEXT = _mesa_TexImage3DEXT;
 390    exec->TexSubImage3DEXT = _mesa_TexSubImage3D;
 391 #endif
 392
 393    /* 11. GL_EXT_histogram */
 394    exec->GetHistogramEXT = _mesa_GetHistogram;
 395    exec->GetHistogramParameterfvEXT = _mesa_GetHistogramParameterfv;
 396    exec->GetHistogramParameterivEXT = _mesa_GetHistogramParameteriv;
 397    exec->GetMinmaxEXT = _mesa_GetMinmax;
 398    exec->GetMinmaxParameterfvEXT = _mesa_GetMinmaxParameterfv;
 399    exec->GetMinmaxParameterivEXT = _mesa_GetMinmaxParameteriv;
 400
 401    /* ?. GL_SGIX_pixel_texture */
 402    exec->PixelTexGenSGIX = _mesa_PixelTexGenSGIX;
 403
 404    /* 15. GL_SGIS_pixel_texture */
 405    exec->PixelTexGenParameteriSGIS = _mesa_PixelTexGenParameteriSGIS;
 406    exec->PixelTexGenParameterivSGIS = _mesa_PixelTexGenParameterivSGIS;
 407    exec->PixelTexGenParameterfSGIS = _mesa_PixelTexGenParameterfSGIS;
 408    exec->PixelTexGenParameterfvSGIS = _mesa_PixelTexGenParameterfvSGIS;
 409    exec->GetPixelTexGenParameterivSGIS = _mesa_GetPixelTexGenParameterivSGIS;
 410    exec->GetPixelTexGenParameterfvSGIS = _mesa_GetPixelTexGenParameterfvSGIS;
 411
 412    /* 30. GL_EXT_vertex_array */
 413    exec->ColorPointerEXT = _mesa_ColorPointerEXT;
 414    exec->EdgeFlagPointerEXT = _mesa_EdgeFlagPointerEXT;
 415    exec->IndexPointerEXT = _mesa_IndexPointerEXT;
 416    exec->NormalPointerEXT = _mesa_NormalPointerEXT;
 417    exec->TexCoordPointerEXT = _mesa_TexCoordPointerEXT;
 418    exec->VertexPointerEXT = _mesa_VertexPointerEXT;
 419
 420    /* 37. GL_EXT_blend_minmax */
 421 #if 0
 422    exec->BlendEquationEXT = _mesa_BlendEquationEXT;
 423 #endif
 424
 425    /* 54. GL_EXT_point_parameters */
 426    exec->PointParameterfEXT = _mesa_PointParameterfEXT;
 427    exec->PointParameterfvEXT = _mesa_PointParameterfvEXT;
 428
 429    /* 78. GL_EXT_paletted_texture */
 430 #if 0
 431    exec->ColorTableEXT = _mesa_ColorTableEXT;
 432    exec->ColorSubTableEXT = _mesa_ColorSubTableEXT;
 433 #endif
 434    exec->GetColorTableEXT = _mesa_GetColorTable;
 435    exec->GetColorTableParameterfvEXT = _mesa_GetColorTableParameterfv;
 436    exec->GetColorTableParameterivEXT = _mesa_GetColorTableParameteriv;
 437
 438    /* 97. GL_EXT_compiled_vertex_array */
 439    exec->LockArraysEXT = _mesa_LockArraysEXT;
 440    exec->UnlockArraysEXT = _mesa_UnlockArraysEXT;
 441
 442    /* 148. GL_EXT_multi_draw_arrays */
 443    exec->MultiDrawArraysEXT = _mesa_MultiDrawArraysEXT;
 444    exec->MultiDrawElementsEXT = _mesa_MultiDrawElementsEXT;
 445
 446    /* 173. GL_INGR_blend_func_separate */
 447    exec->BlendFuncSeparateEXT = _mesa_BlendFuncSeparateEXT;
 448
 449    /* 196. GL_MESA_resize_buffers */
 450    exec->ResizeBuffersMESA = _mesa_ResizeBuffersMESA;
 451
 452    /* 197. GL_MESA_window_pos */
 453    exec->WindowPos2dMESA = _mesa_WindowPos2dMESA;
 454    exec->WindowPos2dvMESA = _mesa_WindowPos2dvMESA;
 455    exec->WindowPos2fMESA = _mesa_WindowPos2fMESA;
 456    exec->WindowPos2fvMESA = _mesa_WindowPos2fvMESA;
 457    exec->WindowPos2iMESA = _mesa_WindowPos2iMESA;
 458    exec->WindowPos2ivMESA = _mesa_WindowPos2ivMESA;
 459    exec->WindowPos2sMESA = _mesa_WindowPos2sMESA;
 460    exec->WindowPos2svMESA = _mesa_WindowPos2svMESA;
 461    exec->WindowPos3dMESA = _mesa_WindowPos3dMESA;
 462    exec->WindowPos3dvMESA = _mesa_WindowPos3dvMESA;
 463    exec->WindowPos3fMESA = _mesa_WindowPos3fMESA;
 464    exec->WindowPos3fvMESA = _mesa_WindowPos3fvMESA;
 465    exec->WindowPos3iMESA = _mesa_WindowPos3iMESA;
 466    exec->WindowPos3ivMESA = _mesa_WindowPos3ivMESA;
 467    exec->WindowPos3sMESA = _mesa_WindowPos3sMESA;
 468    exec->WindowPos3svMESA = _mesa_WindowPos3svMESA;
 469    exec->WindowPos4dMESA = _mesa_WindowPos4dMESA;
 470    exec->WindowPos4dvMESA = _mesa_WindowPos4dvMESA;
 471    exec->WindowPos4fMESA = _mesa_WindowPos4fMESA;
 472    exec->WindowPos4fvMESA = _mesa_WindowPos4fvMESA;
 473    exec->WindowPos4iMESA = _mesa_WindowPos4iMESA;
 474    exec->WindowPos4ivMESA = _mesa_WindowPos4ivMESA;
 475    exec->WindowPos4sMESA = _mesa_WindowPos4sMESA;
 476    exec->WindowPos4svMESA = _mesa_WindowPos4svMESA;
 477
 478    /* 233. GL_NV_vertex_program */
 479 #if FEATURE_NV_vertex_program
 480    exec->BindProgramNV = _mesa_BindProgramNV;
 481    exec->DeleteProgramsNV = _mesa_DeleteProgramsNV;
 482    exec->ExecuteProgramNV = _mesa_ExecuteProgramNV;
 483    exec->GenProgramsNV = _mesa_GenProgramsNV;
 484    exec->AreProgramsResidentNV = _mesa_AreProgramsResidentNV;
 485    exec->RequestResidentProgramsNV = _mesa_RequestResidentProgramsNV;
 486    exec->GetProgramParameterfvNV = _mesa_GetProgramParameterfvNV;
 487    exec->GetProgramParameterdvNV = _mesa_GetProgramParameterdvNV;
 488    exec->GetProgramivNV = _mesa_GetProgramivNV;
 489    exec->GetProgramStringNV = _mesa_GetProgramStringNV;
 490    exec->GetTrackMatrixivNV = _mesa_GetTrackMatrixivNV;
 491    exec->GetVertexAttribdvNV = _mesa_GetVertexAttribdvNV;
 492    exec->GetVertexAttribfvNV = _mesa_GetVertexAttribfvNV;
 493    exec->GetVertexAttribivNV = _mesa_GetVertexAttribivNV;
 494    exec->GetVertexAttribPointervNV = _mesa_GetVertexAttribPointervNV;
 495    exec->IsProgramNV = _mesa_IsProgramNV;
 496    exec->LoadProgramNV = _mesa_LoadProgramNV;
 497    exec->ProgramParameter4dNV = _mesa_ProgramParameter4dNV;
 498    exec->ProgramParameter4dvNV = _mesa_ProgramParameter4dvNV;
 499    exec->ProgramParameter4fNV = _mesa_ProgramParameter4fNV;
 500    exec->ProgramParameter4fvNV = _mesa_ProgramParameter4fvNV;
 501    exec->ProgramParameters4dvNV = _mesa_ProgramParameters4dvNV;
 502    exec->ProgramParameters4fvNV = _mesa_ProgramParameters4fvNV;
 503    exec->TrackMatrixNV = _mesa_TrackMatrixNV;
 504    exec->VertexAttribPointerNV = _mesa_VertexAttribPointerNV;
 505 #endif
 506
 507    /* 262. GL_NV_point_sprite */
 508    exec->PointParameteriNV = _mesa_PointParameteriNV;
 509    exec->PointParameterivNV = _mesa_PointParameterivNV;
 510
 511    /* 268. GL_EXT_stencil_two_side */
 512    exec->ActiveStencilFaceEXT = _mesa_ActiveStencilFaceEXT;
 513
 514    /* ARB 1. GL_ARB_multitexture */
 515    exec->ActiveTextureARB = _mesa_ActiveTextureARB;
 516    exec->ClientActiveTextureARB = _mesa_ClientActiveTextureARB;
 517
 518    /* ARB 3. GL_ARB_transpose_matrix */
 519    exec->LoadTransposeMatrixdARB = _mesa_LoadTransposeMatrixdARB;
 520    exec->LoadTransposeMatrixfARB = _mesa_LoadTransposeMatrixfARB;
 521    exec->MultTransposeMatrixdARB = _mesa_MultTransposeMatrixdARB;
 522    exec->MultTransposeMatrixfARB = _mesa_MultTransposeMatrixfARB;
 523
 524    /* ARB 5. GL_ARB_multisample */
 525    exec->SampleCoverageARB = _mesa_SampleCoverageARB;
 526
 527    /* ARB 12. GL_ARB_texture_compression */
 528    exec->CompressedTexImage3DARB = _mesa_CompressedTexImage3DARB;
 529    exec->CompressedTexImage2DARB = _mesa_CompressedTexImage2DARB;
 530    exec->CompressedTexImage1DARB = _mesa_CompressedTexImage1DARB;
 531    exec->CompressedTexSubImage3DARB = _mesa_CompressedTexSubImage3DARB;
 532    exec->CompressedTexSubImage2DARB = _mesa_CompressedTexSubImage2DARB;
 533    exec->CompressedTexSubImage1DARB = _mesa_CompressedTexSubImage1DARB;
 534    exec->GetCompressedTexImageARB = _mesa_GetCompressedTexImageARB;
 535
 536    /* ARB 14. GL_ARB_point_parameters */
 537    /* reuse EXT_point_parameters functions */
 538 }
 539
 540
 541
 542 /**********************************************************************/
 543 /*****                   State update logic                       *****/
 544 /**********************************************************************/
 545
 546
 547 /*
 548  * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
 549  * in ctx->_TriangleCaps if needed.
 550  */
 551 static void
 552 update_polygon( GLcontext *ctx )
 553 {
 554    ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
 555
 556    if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 557       ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 558
 559    /* Any Polygon offsets enabled? */
 560    if (ctx->Polygon.OffsetPoint ||
 561        ctx->Polygon.OffsetLine ||
 562        ctx->Polygon.OffsetFill) {
 563       ctx->_TriangleCaps |= DD_TRI_OFFSET;
 564    }
 565 }
 566
 567 static void
 568 calculate_model_project_matrix( GLcontext *ctx )
 569 {
 570    _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix,
 571                             ctx->ProjectionMatrixStack.Top,
 572                             ctx->ModelviewMatrixStack.Top );
 573
 574    _math_matrix_analyse( &ctx->_ModelProjectMatrix );
 575 }
 576
 577 static void
 578 update_modelview_scale( GLcontext *ctx )
 579 {
 580    ctx->_ModelViewInvScale = 1.0F;
 581    if (ctx->ModelviewMatrixStack.Top->flags & (MAT_FLAG_UNIFORM_SCALE |
 582                                MAT_FLAG_GENERAL_SCALE |
 583                                MAT_FLAG_GENERAL_3D |
 584                                MAT_FLAG_GENERAL) ) {
 585       const GLfloat *m = ctx->ModelviewMatrixStack.Top->inv;
 586       GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
 587       if (f < 1e-12) f = 1.0;
 588       if (ctx->_NeedEyeCoords)
 589          ctx->_ModelViewInvScale = (GLfloat) (1.0/GL_SQRT(f));
 590       else
 591          ctx->_ModelViewInvScale = (GLfloat) GL_SQRT(f);
 592    }
 593 }
 594
 595
 596 /* Bring uptodate any state that relies on _NeedEyeCoords.
 597  */
 598 static void
 599 update_tnl_spaces( GLcontext *ctx, GLuint oldneedeyecoords )
 600 {
 601    /* Check if the truth-value interpretations of the bitfields have
 602     * changed:
 603     */
 604    if ((oldneedeyecoords == 0) != (ctx->_NeedEyeCoords == 0)) {
 605       /* Recalculate all state that depends on _NeedEyeCoords.
 606        */
 607       update_modelview_scale(ctx);
 608       _mesa_compute_light_positions( ctx );
 609
 610       if (ctx->Driver.LightingSpaceChange)
 611          ctx->Driver.LightingSpaceChange( ctx );
 612    }
 613    else {
 614       GLuint new_state = ctx->NewState;
 615
 616       /* Recalculate that same state only if it has been invalidated
 617        * by other statechanges.
 618        */
 619       if (new_state & _NEW_MODELVIEW)
 620          update_modelview_scale(ctx);
 621
 622       if (new_state & (_NEW_LIGHT|_NEW_MODELVIEW))
 623          _mesa_compute_light_positions( ctx );
 624    }
 625 }
 626
 627
 628 static void
 629 update_drawbuffer( GLcontext *ctx )
 630 {
 631    ctx->DrawBuffer->_Xmin = 0;
 632    ctx->DrawBuffer->_Ymin = 0;
 633    ctx->DrawBuffer->_Xmax = ctx->DrawBuffer->Width;
 634    ctx->DrawBuffer->_Ymax = ctx->DrawBuffer->Height;
 635    if (ctx->Scissor.Enabled) {
 636       if (ctx->Scissor.X > ctx->DrawBuffer->_Xmin) {
 637          ctx->DrawBuffer->_Xmin = ctx->Scissor.X;
 638       }
 639       if (ctx->Scissor.Y > ctx->DrawBuffer->_Ymin) {
 640          ctx->DrawBuffer->_Ymin = ctx->Scissor.Y;
 641       }
 642       if (ctx->Scissor.X + ctx->Scissor.Width < ctx->DrawBuffer->_Xmax) {
 643          ctx->DrawBuffer->_Xmax = ctx->Scissor.X + ctx->Scissor.Width;
 644       }
 645       if (ctx->Scissor.Y + ctx->Scissor.Height < ctx->DrawBuffer->_Ymax) {
 646          ctx->DrawBuffer->_Ymax = ctx->Scissor.Y + ctx->Scissor.Height;
 647       }
 648    }
 649 }
 650
 651
 652 /* NOTE: This routine references Tranform attribute values to compute
 653  * userclip positions in clip space, but is only called on
 654  * _NEW_PROJECTION.  The _mesa_ClipPlane() function keeps these values
 655  * up to date across changes to the Transform attributes.
 656  */
 657 static void
 658 update_projection( GLcontext *ctx )
 659 {
 660    _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
 661
 662    /* Recompute clip plane positions in clipspace.  This is also done
 663     * in _mesa_ClipPlane().
 664     */
 665    if (ctx->Transform.ClipPlanesEnabled) {
 666       GLuint p;
 667       for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
 668          if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
 669             _mesa_transform_vector( ctx->Transform._ClipUserPlane[p],
 670                                  ctx->Transform.EyeUserPlane[p],
 671                                  ctx->ProjectionMatrixStack.Top->inv );
 672          }
 673       }
 674    }
 675 }
 676
 677
 678 /*
 679  * Return a bitmask of IMAGE_*_BIT flags which to indicate which
 680  * pixel transfer operations are enabled.
 681  */
 682 static void
 683 update_image_transfer_state(GLcontext *ctx)
 684 {
 685    GLuint mask = 0;
 686
 687    if (ctx->Pixel.RedScale   != 1.0F || ctx->Pixel.RedBias   != 0.0F ||
 688        ctx->Pixel.GreenScale != 1.0F || ctx->Pixel.GreenBias != 0.0F ||
 689        ctx->Pixel.BlueScale  != 1.0F || ctx->Pixel.BlueBias  != 0.0F ||
 690        ctx->Pixel.AlphaScale != 1.0F || ctx->Pixel.AlphaBias != 0.0F)
 691       mask |= IMAGE_SCALE_BIAS_BIT;
 692
 693    if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset)
 694       mask |= IMAGE_SHIFT_OFFSET_BIT;
 695
 696    if (ctx->Pixel.MapColorFlag)
 697       mask |= IMAGE_MAP_COLOR_BIT;
 698
 699    if (ctx->Pixel.ColorTableEnabled)
 700       mask |= IMAGE_COLOR_TABLE_BIT;
 701
 702    if (ctx->Pixel.Convolution1DEnabled ||
 703        ctx->Pixel.Convolution2DEnabled ||
 704        ctx->Pixel.Separable2DEnabled) {
 705       mask |= IMAGE_CONVOLUTION_BIT;
 706       if (ctx->Pixel.PostConvolutionScale[0] != 1.0F ||
 707           ctx->Pixel.PostConvolutionScale[1] != 1.0F ||
 708           ctx->Pixel.PostConvolutionScale[2] != 1.0F ||
 709           ctx->Pixel.PostConvolutionScale[3] != 1.0F ||
 710           ctx->Pixel.PostConvolutionBias[0] != 0.0F ||
 711           ctx->Pixel.PostConvolutionBias[1] != 0.0F ||
 712           ctx->Pixel.PostConvolutionBias[2] != 0.0F ||
 713           ctx->Pixel.PostConvolutionBias[3] != 0.0F) {
 714          mask |= IMAGE_POST_CONVOLUTION_SCALE_BIAS;
 715       }
 716    }
 717
 718    if (ctx->Pixel.PostConvolutionColorTableEnabled)
 719       mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT;
 720
 721    if (ctx->ColorMatrixStack.Top->type != MATRIX_IDENTITY ||
 722        ctx->Pixel.PostColorMatrixScale[0] != 1.0F ||
 723        ctx->Pixel.PostColorMatrixBias[0]  != 0.0F ||
 724        ctx->Pixel.PostColorMatrixScale[1] != 1.0F ||
 725        ctx->Pixel.PostColorMatrixBias[1]  != 0.0F ||
 726        ctx->Pixel.PostColorMatrixScale[2] != 1.0F ||
 727        ctx->Pixel.PostColorMatrixBias[2]  != 0.0F ||
 728        ctx->Pixel.PostColorMatrixScale[3] != 1.0F ||
 729        ctx->Pixel.PostColorMatrixBias[3]  != 0.0F)
 730       mask |= IMAGE_COLOR_MATRIX_BIT;
 731
 732    if (ctx->Pixel.PostColorMatrixColorTableEnabled)
 733       mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT;
 734
 735    if (ctx->Pixel.HistogramEnabled)
 736       mask |= IMAGE_HISTOGRAM_BIT;
 737
 738    if (ctx->Pixel.MinMaxEnabled)
 739       mask |= IMAGE_MIN_MAX_BIT;
 740
 741    ctx->_ImageTransferState = mask;
 742 }
 743
 744
 745
 746
 747 /* Note: This routine refers to derived texture attribute values to
 748  * compute the ENABLE_TEXMAT flags, but is only called on
 749  * _NEW_TEXTURE_MATRIX.  On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
 750  * flags are updated by _mesa_update_textures(), below.
 751  *
 752  * If both TEXTURE and TEXTURE_MATRIX change at once, these values
 753  * will be computed twice.
 754  */
 755 static void
 756 update_texture_matrices( GLcontext *ctx )
 757 {
 758    GLuint i;
 759
 760    ctx->Texture._TexMatEnabled = 0;
 761
 762    for (i=0; i < ctx->Const.MaxTextureUnits; i++) {
 763       if (ctx->TextureMatrixStack[i].Top->flags & MAT_DIRTY) {
 764          _math_matrix_analyse( ctx->TextureMatrixStack[i].Top );
 765
 766          if (ctx->Texture.Unit[i]._ReallyEnabled &&
 767              ctx->TextureMatrixStack[i].Top->type != MATRIX_IDENTITY)
 768             ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i);
 769
 770          if (ctx->Driver.TextureMatrix)
 771             ctx->Driver.TextureMatrix( ctx, i, ctx->TextureMatrixStack[i].Top);
 772       }
 773    }
 774 }
 775
 776
 777 /* Note: This routine refers to derived texture matrix values to
 778  * compute the ENABLE_TEXMAT flags, but is only called on
 779  * _NEW_TEXTURE.  On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
 780  * flags are updated by _mesa_update_texture_matrices, above.
 781  *
 782  * If both TEXTURE and TEXTURE_MATRIX change at once, these values
 783  * will be computed twice.
 784  */
 785 static void
 786 update_texture_state( GLcontext *ctx )
 787 {
 788    GLuint unit;
 789
 790    ctx->Texture._EnabledUnits = 0;
 791    ctx->Texture._GenFlags = 0;
 792    ctx->_NeedNormals &= ~NEED_NORMALS_TEXGEN;
 793    ctx->_NeedEyeCoords &= ~NEED_EYE_TEXGEN;
 794    ctx->Texture._TexMatEnabled = 0;
 795    ctx->Texture._TexGenEnabled = 0;
 796
 797    /* Update texture unit state.
 798     */
 799    for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
 800       struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
 801
 802       texUnit->_ReallyEnabled = 0;
 803       texUnit->_GenFlags = 0;
 804
 805       if (!texUnit->Enabled)
 806          continue;
 807
 808       /* Look for the highest-priority texture target that's enabled and
 809        * complete.  That's the one we'll use for texturing.
 810        */
 811       if (texUnit->Enabled & TEXTURE_CUBE_BIT) {
 812          struct gl_texture_object *texObj = texUnit->CurrentCubeMap;
 813          if (!texObj->Complete) {
 814             _mesa_test_texobj_completeness(ctx, texObj);
 815          }
 816          if (texObj->Complete) {
 817             texUnit->_ReallyEnabled = TEXTURE_CUBE_BIT;
 818             texUnit->_Current = texObj;
 819          }
 820       }
 821
 822       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE_3D_BIT)) {
 823          struct gl_texture_object *texObj = texUnit->Current3D;
 824          if (!texObj->Complete) {
 825             _mesa_test_texobj_completeness(ctx, texObj);
 826          }
 827          if (texObj->Complete) {
 828             texUnit->_ReallyEnabled = TEXTURE_3D_BIT;
 829             texUnit->_Current = texObj;
 830          }
 831       }
 832
 833       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE_RECT_BIT)) {
 834          struct gl_texture_object *texObj = texUnit->CurrentRect;
 835          if (!texObj->Complete) {
 836             _mesa_test_texobj_completeness(ctx, texObj);
 837          }
 838          if (texObj->Complete) {
 839             texUnit->_ReallyEnabled = TEXTURE_RECT_BIT;
 840             texUnit->_Current = texObj;
 841          }
 842       }
 843
 844       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE_2D_BIT)) {
 845          struct gl_texture_object *texObj = texUnit->Current2D;
 846          if (!texObj->Complete) {
 847             _mesa_test_texobj_completeness(ctx, texObj);
 848          }
 849          if (texObj->Complete) {
 850             texUnit->_ReallyEnabled = TEXTURE_2D_BIT;
 851             texUnit->_Current = texObj;
 852          }
 853       }
 854
 855       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE_1D_BIT)) {
 856          struct gl_texture_object *texObj = texUnit->Current1D;
 857          if (!texObj->Complete) {
 858             _mesa_test_texobj_completeness(ctx, texObj);
 859          }
 860          if (texObj->Complete) {
 861             texUnit->_ReallyEnabled = TEXTURE_1D_BIT;
 862             texUnit->_Current = texObj;
 863          }
 864       }
 865
 866       if (!texUnit->_ReallyEnabled) {
 867          texUnit->_Current = NULL;
 868          continue;
 869       }
 870
 871       if (texUnit->_ReallyEnabled)
 872          ctx->Texture._EnabledUnits |= (1 << unit);
 873
 874       if (texUnit->TexGenEnabled) {
 875          if (texUnit->TexGenEnabled & S_BIT) {
 876             texUnit->_GenFlags |= texUnit->_GenBitS;
 877          }
 878          if (texUnit->TexGenEnabled & T_BIT) {
 879             texUnit->_GenFlags |= texUnit->_GenBitT;
 880          }
 881          if (texUnit->TexGenEnabled & Q_BIT) {
 882             texUnit->_GenFlags |= texUnit->_GenBitQ;
 883          }
 884          if (texUnit->TexGenEnabled & R_BIT) {
 885             texUnit->_GenFlags |= texUnit->_GenBitR;
 886          }
 887
 888          ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(unit);
 889          ctx->Texture._GenFlags |= texUnit->_GenFlags;
 890       }
 891
 892       if (ctx->TextureMatrixStack[unit].Top->type != MATRIX_IDENTITY)
 893          ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(unit);
 894    }
 895
 896    if (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS) {
 897       ctx->_NeedNormals |= NEED_NORMALS_TEXGEN;
 898       ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
 899    }
 900
 901    if (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) {
 902       ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
 903    }
 904 }
 905
 906
 907
 908 /*
 909  * If ctx->NewState is non-zero then this function MUST be called before
 910  * rendering any primitive.  Basically, function pointers and miscellaneous
 911  * flags are updated to reflect the current state of the state machine.
 912  *
 913  * The above constraint is now maintained largely by the two Exec
 914  * dispatch tables, which trigger the appropriate flush on transition
 915  * between State and Geometry modes.
 916  *
 917  * Special care is taken with the derived value _NeedEyeCoords.  This
 918  * is a bitflag which is updated with information from a number of
 919  * attribute groups (MODELVIEW, LIGHT, TEXTURE).  A lot of derived
 920  * state references this value, and must be treated with care to
 921  * ensure that updates are done correctly.  All state dependent on
 922  * _NeedEyeCoords is calculated from within _mesa_update_tnl_spaces(),
 923  * and from nowhere else.
 924  */
 925 void _mesa_update_state( GLcontext *ctx )
 926 {
 927    const GLuint new_state = ctx->NewState;
 928    const GLuint oldneedeyecoords = ctx->_NeedEyeCoords;
 929
 930    if (MESA_VERBOSE & VERBOSE_STATE)
 931       _mesa_print_state("_mesa_update_state", new_state);
 932
 933    if (new_state & _NEW_MODELVIEW)
 934       _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
 935
 936    if (new_state & _NEW_PROJECTION)
 937       update_projection( ctx );
 938
 939    if (new_state & _NEW_TEXTURE_MATRIX)
 940       update_texture_matrices( ctx );
 941
 942    if (new_state & _NEW_COLOR_MATRIX)
 943       _math_matrix_analyse( ctx->ColorMatrixStack.Top );
 944
 945    /* References ColorMatrix.type (derived above).
 946     */
 947    if (new_state & _IMAGE_NEW_TRANSFER_STATE)
 948       update_image_transfer_state(ctx);
 949
 950    /* Contributes to NeedEyeCoords, NeedNormals.
 951     */
 952    if (new_state & _NEW_TEXTURE)
 953       update_texture_state( ctx );
 954
 955    if (new_state & (_NEW_BUFFERS|_NEW_SCISSOR))
 956       update_drawbuffer( ctx );
 957
 958    if (new_state & _NEW_POLYGON)
 959       update_polygon( ctx );
 960
 961    /* Contributes to NeedEyeCoords, NeedNormals.
 962     */
 963    if (new_state & _NEW_LIGHT)
 964       _mesa_update_lighting( ctx );
 965
 966    /* We can light in object space if the modelview matrix preserves
 967     * lengths and relative angles.
 968     */
 969    if (new_state & (_NEW_MODELVIEW|_NEW_LIGHT)) {
 970       ctx->_NeedEyeCoords &= ~NEED_EYE_LIGHT_MODELVIEW;
 971       if (ctx->Light.Enabled &&
 972           !TEST_MAT_FLAGS( ctx->ModelviewMatrixStack.Top, MAT_FLAGS_LENGTH_PRESERVING))
 973             ctx->_NeedEyeCoords |= NEED_EYE_LIGHT_MODELVIEW;
 974    }
 975
 976
 977 #if 0
 978    /* XXX this is a bit of a hack.  We should be checking elsewhere if
 979     * vertex program mode is enabled.  We set _NeedEyeCoords to zero to
 980     * ensure that the combined modelview/projection matrix is computed
 981     * in calculate_model_project_matrix().
 982     */
 983    if (ctx->VertexProgram.Enabled)
 984       ctx->_NeedEyeCoords = 0;
 985    /* KW: it's now always computed.
 986     */
 987 #endif
 988
 989    /* Keep ModelviewProject uptodate always to allow tnl
 990     * implementations that go model->clip even when eye is required.
 991     */
 992    if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
 993       calculate_model_project_matrix(ctx);
 994
 995    /* ctx->_NeedEyeCoords is now uptodate.
 996     *
 997     * If the truth value of this variable has changed, update for the
 998     * new lighting space and recompute the positions of lights and the
 999     * normal transform.
1000     *
1001     * If the lighting space hasn't changed, may still need to recompute
1002     * light positions & normal transforms for other reasons.
1003     */
1004    if (new_state & (_NEW_MODELVIEW |
1005                     _NEW_LIGHT |
1006                     _MESA_NEW_NEED_EYE_COORDS))
1007       update_tnl_spaces( ctx, oldneedeyecoords );
1008
1009    /*
1010     * Here the driver sets up all the ctx->Driver function pointers
1011     * to it's specific, private functions, and performs any
1012     * internal state management necessary, including invalidating
1013     * state of active modules.
1014     *
1015     * Set ctx->NewState to zero to avoid recursion if
1016     * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
1017     */
1018    ctx->NewState = 0;
1019    ctx->Driver.UpdateState(ctx, new_state);
1020    ctx->Array.NewState = 0;
1021
1022    /* At this point we can do some assertions to be sure the required
1023     * device driver function pointers are all initialized.
1024     */
1025    ASSERT(ctx->Driver.GetString);
1026    ASSERT(ctx->Driver.UpdateState);
1027    ASSERT(ctx->Driver.Clear);
1028    ASSERT(ctx->Driver.GetBufferSize);
1029    if (ctx->Visual.accumRedBits > 0) {
1030       ASSERT(ctx->Driver.Accum);
1031    }
1032    ASSERT(ctx->Driver.DrawPixels);
1033    ASSERT(ctx->Driver.ReadPixels);
1034    ASSERT(ctx->Driver.CopyPixels);
1035    ASSERT(ctx->Driver.Bitmap);
1036    ASSERT(ctx->Driver.ResizeBuffers);
1037    ASSERT(ctx->Driver.TexImage1D);
1038    ASSERT(ctx->Driver.TexImage2D);
1039    ASSERT(ctx->Driver.TexImage3D);
1040    ASSERT(ctx->Driver.TexSubImage1D);
1041    ASSERT(ctx->Driver.TexSubImage2D);
1042    ASSERT(ctx->Driver.TexSubImage3D);
1043    ASSERT(ctx->Driver.CopyTexImage1D);
1044    ASSERT(ctx->Driver.CopyTexImage2D);
1045    ASSERT(ctx->Driver.CopyTexSubImage1D);
1046    ASSERT(ctx->Driver.CopyTexSubImage2D);
1047    ASSERT(ctx->Driver.CopyTexSubImage3D);
1048    if (ctx->Extensions.ARB_texture_compression) {
1049 #if 0  /* HW drivers need these, but not SW rasterizers */
1050       ASSERT(ctx->Driver.CompressedTexImage1D);
1051       ASSERT(ctx->Driver.CompressedTexImage2D);
1052       ASSERT(ctx->Driver.CompressedTexImage3D);
1053       ASSERT(ctx->Driver.CompressedTexSubImage1D);
1054       ASSERT(ctx->Driver.CompressedTexSubImage2D);
1055       ASSERT(ctx->Driver.CompressedTexSubImage3D);
1056 #endif
1057    }
1058 }
1059
1060 /* Is this helpful?
1061  */
1062 void
1063 _mesa_allow_light_in_model( GLcontext *ctx, GLboolean flag )
1064 {
1065    if (flag)
1066       ctx->_NeedEyeCoords &= ~NEED_EYE_DRIVER;
1067    else
1068       ctx->_NeedEyeCoords |= NEED_EYE_DRIVER;
1069
1070    ctx->NewState |= _NEW_POINT; /* one of the bits from
1071                                  * _MESA_NEW_NEED_EYE_COORDS.
1072                                  */
1073 }