src/mesa/main/state.c

   1 /* $Id: state.c,v 1.71 2001/11/18 23:52:38 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2001  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 #ifdef PC_HEADER
  35 #include "all.h"
  36 #else
  37 #include "glheader.h"
  38 #include "accum.h"
  39 #include "api_loopback.h"
  40 #include "attrib.h"
  41 #include "blend.h"
  42 #include "buffers.h"
  43 #include "clip.h"
  44 #include "colortab.h"
  45 #include "context.h"
  46 #include "convolve.h"
  47 #include "depth.h"
  48 #include "dlist.h"
  49 #include "drawpix.h"
  50 #include "enable.h"
  51 #include "eval.h"
  52 #include "get.h"
  53 #include "feedback.h"
  54 #include "fog.h"
  55 #include "hint.h"
  56 #include "histogram.h"
  57 #include "light.h"
  58 #include "lines.h"
  59 #include "matrix.h"
  60 #include "mmath.h"
  61 #include "pixel.h"
  62 #include "points.h"
  63 #include "polygon.h"
  64 #include "rastpos.h"
  65 #include "state.h"
  66 #include "stencil.h"
  67 #include "teximage.h"
  68 #include "texobj.h"
  69 #include "texstate.h"
  70 #include "mtypes.h"
  71 #include "varray.h"
  72
  73 #include "math/m_matrix.h"
  74 #include "math/m_xform.h"
  75 #endif
  76
  77
  78 static int
  79 generic_noop(void)
  80 {
  81 #ifdef DEBUG
  82    _mesa_problem(NULL, "undefined function dispatch");
  83 #endif
  84    return 0;
  85 }
  86
  87
  88 /*
  89  * Set all pointers in the given dispatch table to point to a
  90  * generic no-op function.
  91  */
  92 void
  93 _mesa_init_no_op_table(struct _glapi_table *table, GLuint tableSize)
  94 {
  95    GLuint i;
  96    void **dispatch = (void **) table;
  97    for (i = 0; i < tableSize; i++) {
  98       dispatch[i] = (void *) generic_noop;
  99    }
 100 }
 101
 102
 103
 104 /*
 105  * Initialize the given dispatch table with pointers to Mesa's
 106  * immediate-mode commands.
 107  *
 108  * Pointers to begin/end object commands and a few others
 109  * are provided via the vtxfmt interface elsewhere.
 110  */
 111 void
 112 _mesa_init_exec_table(struct _glapi_table *exec, GLuint tableSize)
 113 {
 114    /* first initialize all dispatch slots to no-op */
 115    _mesa_init_no_op_table(exec, tableSize);
 116
 117    _mesa_loopback_init_api_table( exec, GL_TRUE );
 118
 119    /* load the dispatch slots we understand */
 120    exec->Accum = _mesa_Accum;
 121    exec->AlphaFunc = _mesa_AlphaFunc;
 122    exec->Bitmap = _mesa_Bitmap;
 123    exec->BlendFunc = _mesa_BlendFunc;
 124    exec->CallList = _mesa_CallList;
 125    exec->CallLists = _mesa_CallLists;
 126    exec->Clear = _mesa_Clear;
 127    exec->ClearAccum = _mesa_ClearAccum;
 128    exec->ClearColor = _mesa_ClearColor;
 129    exec->ClearDepth = _mesa_ClearDepth;
 130    exec->ClearIndex = _mesa_ClearIndex;
 131    exec->ClearStencil = _mesa_ClearStencil;
 132    exec->ClipPlane = _mesa_ClipPlane;
 133    exec->ColorMask = _mesa_ColorMask;
 134    exec->ColorMaterial = _mesa_ColorMaterial;
 135    exec->CopyPixels = _mesa_CopyPixels;
 136    exec->CullFace = _mesa_CullFace;
 137    exec->DeleteLists = _mesa_DeleteLists;
 138    exec->DepthFunc = _mesa_DepthFunc;
 139    exec->DepthMask = _mesa_DepthMask;
 140    exec->DepthRange = _mesa_DepthRange;
 141    exec->Disable = _mesa_Disable;
 142    exec->DrawBuffer = _mesa_DrawBuffer;
 143    exec->DrawPixels = _mesa_DrawPixels;
 144    exec->Enable = _mesa_Enable;
 145    exec->EndList = _mesa_EndList;
 146    exec->FeedbackBuffer = _mesa_FeedbackBuffer;
 147    exec->Finish = _mesa_Finish;
 148    exec->Flush = _mesa_Flush;
 149    exec->FogCoordPointerEXT = _mesa_FogCoordPointerEXT;
 150    exec->Fogf = _mesa_Fogf;
 151    exec->Fogfv = _mesa_Fogfv;
 152    exec->Fogi = _mesa_Fogi;
 153    exec->Fogiv = _mesa_Fogiv;
 154    exec->FrontFace = _mesa_FrontFace;
 155    exec->Frustum = _mesa_Frustum;
 156    exec->GenLists = _mesa_GenLists;
 157    exec->GetBooleanv = _mesa_GetBooleanv;
 158    exec->GetClipPlane = _mesa_GetClipPlane;
 159    exec->GetDoublev = _mesa_GetDoublev;
 160    exec->GetError = _mesa_GetError;
 161    exec->GetFloatv = _mesa_GetFloatv;
 162    exec->GetIntegerv = _mesa_GetIntegerv;
 163    exec->GetLightfv = _mesa_GetLightfv;
 164    exec->GetLightiv = _mesa_GetLightiv;
 165    exec->GetMapdv = _mesa_GetMapdv;
 166    exec->GetMapfv = _mesa_GetMapfv;
 167    exec->GetMapiv = _mesa_GetMapiv;
 168    exec->GetMaterialfv = _mesa_GetMaterialfv;
 169    exec->GetMaterialiv = _mesa_GetMaterialiv;
 170    exec->GetPixelMapfv = _mesa_GetPixelMapfv;
 171    exec->GetPixelMapuiv = _mesa_GetPixelMapuiv;
 172    exec->GetPixelMapusv = _mesa_GetPixelMapusv;
 173    exec->GetPolygonStipple = _mesa_GetPolygonStipple;
 174    exec->GetString = _mesa_GetString;
 175    exec->GetTexEnvfv = _mesa_GetTexEnvfv;
 176    exec->GetTexEnviv = _mesa_GetTexEnviv;
 177    exec->GetTexGendv = _mesa_GetTexGendv;
 178    exec->GetTexGenfv = _mesa_GetTexGenfv;
 179    exec->GetTexGeniv = _mesa_GetTexGeniv;
 180    exec->GetTexImage = _mesa_GetTexImage;
 181    exec->GetTexLevelParameterfv = _mesa_GetTexLevelParameterfv;
 182    exec->GetTexLevelParameteriv = _mesa_GetTexLevelParameteriv;
 183    exec->GetTexParameterfv = _mesa_GetTexParameterfv;
 184    exec->GetTexParameteriv = _mesa_GetTexParameteriv;
 185    exec->Hint = _mesa_Hint;
 186    exec->IndexMask = _mesa_IndexMask;
 187    exec->InitNames = _mesa_InitNames;
 188    exec->IsEnabled = _mesa_IsEnabled;
 189    exec->IsList = _mesa_IsList;
 190    exec->LightModelf = _mesa_LightModelf;
 191    exec->LightModelfv = _mesa_LightModelfv;
 192    exec->LightModeli = _mesa_LightModeli;
 193    exec->LightModeliv = _mesa_LightModeliv;
 194    exec->Lightf = _mesa_Lightf;
 195    exec->Lightfv = _mesa_Lightfv;
 196    exec->Lighti = _mesa_Lighti;
 197    exec->Lightiv = _mesa_Lightiv;
 198    exec->LineStipple = _mesa_LineStipple;
 199    exec->LineWidth = _mesa_LineWidth;
 200    exec->ListBase = _mesa_ListBase;
 201    exec->LoadIdentity = _mesa_LoadIdentity;
 202    exec->LoadMatrixd = _mesa_LoadMatrixd;
 203    exec->LoadMatrixf = _mesa_LoadMatrixf;
 204    exec->LoadName = _mesa_LoadName;
 205    exec->LogicOp = _mesa_LogicOp;
 206    exec->Map1d = _mesa_Map1d;
 207    exec->Map1f = _mesa_Map1f;
 208    exec->Map2d = _mesa_Map2d;
 209    exec->Map2f = _mesa_Map2f;
 210    exec->MapGrid1d = _mesa_MapGrid1d;
 211    exec->MapGrid1f = _mesa_MapGrid1f;
 212    exec->MapGrid2d = _mesa_MapGrid2d;
 213    exec->MapGrid2f = _mesa_MapGrid2f;
 214    exec->MatrixMode = _mesa_MatrixMode;
 215    exec->MultMatrixd = _mesa_MultMatrixd;
 216    exec->MultMatrixf = _mesa_MultMatrixf;
 217    exec->NewList = _mesa_NewList;
 218    exec->Ortho = _mesa_Ortho;
 219    exec->PassThrough = _mesa_PassThrough;
 220    exec->PixelMapfv = _mesa_PixelMapfv;
 221    exec->PixelMapuiv = _mesa_PixelMapuiv;
 222    exec->PixelMapusv = _mesa_PixelMapusv;
 223    exec->PixelStoref = _mesa_PixelStoref;
 224    exec->PixelStorei = _mesa_PixelStorei;
 225    exec->PixelTransferf = _mesa_PixelTransferf;
 226    exec->PixelTransferi = _mesa_PixelTransferi;
 227    exec->PixelZoom = _mesa_PixelZoom;
 228    exec->PointSize = _mesa_PointSize;
 229    exec->PolygonMode = _mesa_PolygonMode;
 230    exec->PolygonOffset = _mesa_PolygonOffset;
 231    exec->PolygonStipple = _mesa_PolygonStipple;
 232    exec->PopAttrib = _mesa_PopAttrib;
 233    exec->PopMatrix = _mesa_PopMatrix;
 234    exec->PopName = _mesa_PopName;
 235    exec->PushAttrib = _mesa_PushAttrib;
 236    exec->PushMatrix = _mesa_PushMatrix;
 237    exec->PushName = _mesa_PushName;
 238    exec->RasterPos2d = _mesa_RasterPos2d;
 239    exec->RasterPos2dv = _mesa_RasterPos2dv;
 240    exec->RasterPos2f = _mesa_RasterPos2f;
 241    exec->RasterPos2fv = _mesa_RasterPos2fv;
 242    exec->RasterPos2i = _mesa_RasterPos2i;
 243    exec->RasterPos2iv = _mesa_RasterPos2iv;
 244    exec->RasterPos2s = _mesa_RasterPos2s;
 245    exec->RasterPos2sv = _mesa_RasterPos2sv;
 246    exec->RasterPos3d = _mesa_RasterPos3d;
 247    exec->RasterPos3dv = _mesa_RasterPos3dv;
 248    exec->RasterPos3f = _mesa_RasterPos3f;
 249    exec->RasterPos3fv = _mesa_RasterPos3fv;
 250    exec->RasterPos3i = _mesa_RasterPos3i;
 251    exec->RasterPos3iv = _mesa_RasterPos3iv;
 252    exec->RasterPos3s = _mesa_RasterPos3s;
 253    exec->RasterPos3sv = _mesa_RasterPos3sv;
 254    exec->RasterPos4d = _mesa_RasterPos4d;
 255    exec->RasterPos4dv = _mesa_RasterPos4dv;
 256    exec->RasterPos4f = _mesa_RasterPos4f;
 257    exec->RasterPos4fv = _mesa_RasterPos4fv;
 258    exec->RasterPos4i = _mesa_RasterPos4i;
 259    exec->RasterPos4iv = _mesa_RasterPos4iv;
 260    exec->RasterPos4s = _mesa_RasterPos4s;
 261    exec->RasterPos4sv = _mesa_RasterPos4sv;
 262    exec->ReadBuffer = _mesa_ReadBuffer;
 263    exec->ReadPixels = _mesa_ReadPixels;
 264    exec->RenderMode = _mesa_RenderMode;
 265    exec->Rotated = _mesa_Rotated;
 266    exec->Rotatef = _mesa_Rotatef;
 267    exec->Scaled = _mesa_Scaled;
 268    exec->Scalef = _mesa_Scalef;
 269    exec->Scissor = _mesa_Scissor;
 270    exec->SecondaryColorPointerEXT = _mesa_SecondaryColorPointerEXT;
 271    exec->SelectBuffer = _mesa_SelectBuffer;
 272    exec->ShadeModel = _mesa_ShadeModel;
 273    exec->StencilFunc = _mesa_StencilFunc;
 274    exec->StencilMask = _mesa_StencilMask;
 275    exec->StencilOp = _mesa_StencilOp;
 276    exec->TexEnvf = _mesa_TexEnvf;
 277    exec->TexEnvfv = _mesa_TexEnvfv;
 278    exec->TexEnvi = _mesa_TexEnvi;
 279    exec->TexEnviv = _mesa_TexEnviv;
 280    exec->TexGend = _mesa_TexGend;
 281    exec->TexGendv = _mesa_TexGendv;
 282    exec->TexGenf = _mesa_TexGenf;
 283    exec->TexGenfv = _mesa_TexGenfv;
 284    exec->TexGeni = _mesa_TexGeni;
 285    exec->TexGeniv = _mesa_TexGeniv;
 286    exec->TexImage1D = _mesa_TexImage1D;
 287    exec->TexImage2D = _mesa_TexImage2D;
 288    exec->TexParameterf = _mesa_TexParameterf;
 289    exec->TexParameterfv = _mesa_TexParameterfv;
 290    exec->TexParameteri = _mesa_TexParameteri;
 291    exec->TexParameteriv = _mesa_TexParameteriv;
 292    exec->Translated = _mesa_Translated;
 293    exec->Translatef = _mesa_Translatef;
 294    exec->Viewport = _mesa_Viewport;
 295
 296    /* 1.1 */
 297    exec->AreTexturesResident = _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->GetPointerv = _mesa_GetPointerv;
 310    exec->IndexPointer = _mesa_IndexPointer;
 311    exec->InterleavedArrays = _mesa_InterleavedArrays;
 312    exec->IsTexture = _mesa_IsTexture;
 313    exec->NormalPointer = _mesa_NormalPointer;
 314    exec->PopClientAttrib = _mesa_PopClientAttrib;
 315    exec->PrioritizeTextures = _mesa_PrioritizeTextures;
 316    exec->PushClientAttrib = _mesa_PushClientAttrib;
 317    exec->TexCoordPointer = _mesa_TexCoordPointer;
 318    exec->TexSubImage1D = _mesa_TexSubImage1D;
 319    exec->TexSubImage2D = _mesa_TexSubImage2D;
 320    exec->VertexPointer = _mesa_VertexPointer;
 321
 322    /* 1.2 */
 323    exec->CopyTexSubImage3D = _mesa_CopyTexSubImage3D;
 324    exec->TexImage3D = _mesa_TexImage3D;
 325    exec->TexSubImage3D = _mesa_TexSubImage3D;
 326
 327    /* OpenGL 1.2  GL_ARB_imaging */
 328    exec->BlendColor = _mesa_BlendColor;
 329    exec->BlendEquation = _mesa_BlendEquation;
 330    exec->ColorSubTable = _mesa_ColorSubTable;
 331    exec->ColorTable = _mesa_ColorTable;
 332    exec->ColorTableParameterfv = _mesa_ColorTableParameterfv;
 333    exec->ColorTableParameteriv = _mesa_ColorTableParameteriv;
 334    exec->ConvolutionFilter1D = _mesa_ConvolutionFilter1D;
 335    exec->ConvolutionFilter2D = _mesa_ConvolutionFilter2D;
 336    exec->ConvolutionParameterf = _mesa_ConvolutionParameterf;
 337    exec->ConvolutionParameterfv = _mesa_ConvolutionParameterfv;
 338    exec->ConvolutionParameteri = _mesa_ConvolutionParameteri;
 339    exec->ConvolutionParameteriv = _mesa_ConvolutionParameteriv;
 340    exec->CopyColorSubTable = _mesa_CopyColorSubTable;
 341    exec->CopyColorTable = _mesa_CopyColorTable;
 342    exec->CopyConvolutionFilter1D = _mesa_CopyConvolutionFilter1D;
 343    exec->CopyConvolutionFilter2D = _mesa_CopyConvolutionFilter2D;
 344    exec->GetColorTable = _mesa_GetColorTable;
 345    exec->GetColorTableParameterfv = _mesa_GetColorTableParameterfv;
 346    exec->GetColorTableParameteriv = _mesa_GetColorTableParameteriv;
 347    exec->GetConvolutionFilter = _mesa_GetConvolutionFilter;
 348    exec->GetConvolutionParameterfv = _mesa_GetConvolutionParameterfv;
 349    exec->GetConvolutionParameteriv = _mesa_GetConvolutionParameteriv;
 350    exec->GetHistogram = _mesa_GetHistogram;
 351    exec->GetHistogramParameterfv = _mesa_GetHistogramParameterfv;
 352    exec->GetHistogramParameteriv = _mesa_GetHistogramParameteriv;
 353    exec->GetMinmax = _mesa_GetMinmax;
 354    exec->GetMinmaxParameterfv = _mesa_GetMinmaxParameterfv;
 355    exec->GetMinmaxParameteriv = _mesa_GetMinmaxParameteriv;
 356    exec->GetSeparableFilter = _mesa_GetSeparableFilter;
 357    exec->Histogram = _mesa_Histogram;
 358    exec->Minmax = _mesa_Minmax;
 359    exec->ResetHistogram = _mesa_ResetHistogram;
 360    exec->ResetMinmax = _mesa_ResetMinmax;
 361    exec->SeparableFilter2D = _mesa_SeparableFilter2D;
 362
 363    /* 2. GL_EXT_blend_color */
 364 #if 0
 365    exec->BlendColorEXT = _mesa_BlendColorEXT;
 366 #endif
 367
 368    /* 3. GL_EXT_polygon_offset */
 369    exec->PolygonOffsetEXT = _mesa_PolygonOffsetEXT;
 370
 371    /* 6. GL_EXT_texture3d */
 372 #if 0
 373    exec->CopyTexSubImage3DEXT = _mesa_CopyTexSubImage3D;
 374    exec->TexImage3DEXT = _mesa_TexImage3DEXT;
 375    exec->TexSubImage3DEXT = _mesa_TexSubImage3D;
 376 #endif
 377
 378    /* 11. GL_EXT_histogram */
 379    exec->GetHistogramEXT = _mesa_GetHistogram;
 380    exec->GetHistogramParameterfvEXT = _mesa_GetHistogramParameterfv;
 381    exec->GetHistogramParameterivEXT = _mesa_GetHistogramParameteriv;
 382    exec->GetMinmaxEXT = _mesa_GetMinmax;
 383    exec->GetMinmaxParameterfvEXT = _mesa_GetMinmaxParameterfv;
 384    exec->GetMinmaxParameterivEXT = _mesa_GetMinmaxParameteriv;
 385
 386    /* ?. GL_SGIX_pixel_texture */
 387    exec->PixelTexGenSGIX = _mesa_PixelTexGenSGIX;
 388
 389    /* 15. GL_SGIS_pixel_texture */
 390    exec->PixelTexGenParameteriSGIS = _mesa_PixelTexGenParameteriSGIS;
 391    exec->PixelTexGenParameterivSGIS = _mesa_PixelTexGenParameterivSGIS;
 392    exec->PixelTexGenParameterfSGIS = _mesa_PixelTexGenParameterfSGIS;
 393    exec->PixelTexGenParameterfvSGIS = _mesa_PixelTexGenParameterfvSGIS;
 394    exec->GetPixelTexGenParameterivSGIS = _mesa_GetPixelTexGenParameterivSGIS;
 395    exec->GetPixelTexGenParameterfvSGIS = _mesa_GetPixelTexGenParameterfvSGIS;
 396
 397    /* 30. GL_EXT_vertex_array */
 398    exec->ColorPointerEXT = _mesa_ColorPointerEXT;
 399    exec->EdgeFlagPointerEXT = _mesa_EdgeFlagPointerEXT;
 400    exec->IndexPointerEXT = _mesa_IndexPointerEXT;
 401    exec->NormalPointerEXT = _mesa_NormalPointerEXT;
 402    exec->TexCoordPointerEXT = _mesa_TexCoordPointerEXT;
 403    exec->VertexPointerEXT = _mesa_VertexPointerEXT;
 404
 405    /* 37. GL_EXT_blend_minmax */
 406 #if 0
 407    exec->BlendEquationEXT = _mesa_BlendEquationEXT;
 408 #endif
 409
 410    /* 54. GL_EXT_point_parameters */
 411    exec->PointParameterfARB = _mesa_PointParameterfEXT;
 412    exec->PointParameterfvARB = _mesa_PointParameterfvEXT;
 413
 414    /* 78. GL_EXT_paletted_texture */
 415 #if 0
 416    exec->ColorTableEXT = _mesa_ColorTableEXT;
 417    exec->ColorSubTableEXT = _mesa_ColorSubTableEXT;
 418 #endif
 419    exec->GetColorTableEXT = _mesa_GetColorTable;
 420    exec->GetColorTableParameterfvEXT = _mesa_GetColorTableParameterfv;
 421    exec->GetColorTableParameterivEXT = _mesa_GetColorTableParameteriv;
 422
 423    /* 97. GL_EXT_compiled_vertex_array */
 424    exec->LockArraysEXT = _mesa_LockArraysEXT;
 425    exec->UnlockArraysEXT = _mesa_UnlockArraysEXT;
 426
 427    /* 173. GL_INGR_blend_func_separate */
 428    exec->BlendFuncSeparateEXT = _mesa_BlendFuncSeparateEXT;
 429
 430    /* 196. GL_MESA_resize_buffers */
 431    exec->ResizeBuffersMESA = _mesa_ResizeBuffersMESA;
 432
 433    /* 197. GL_MESA_window_pos */
 434    exec->WindowPos2dMESA = _mesa_WindowPos2dMESA;
 435    exec->WindowPos2dvMESA = _mesa_WindowPos2dvMESA;
 436    exec->WindowPos2fMESA = _mesa_WindowPos2fMESA;
 437    exec->WindowPos2fvMESA = _mesa_WindowPos2fvMESA;
 438    exec->WindowPos2iMESA = _mesa_WindowPos2iMESA;
 439    exec->WindowPos2ivMESA = _mesa_WindowPos2ivMESA;
 440    exec->WindowPos2sMESA = _mesa_WindowPos2sMESA;
 441    exec->WindowPos2svMESA = _mesa_WindowPos2svMESA;
 442    exec->WindowPos3dMESA = _mesa_WindowPos3dMESA;
 443    exec->WindowPos3dvMESA = _mesa_WindowPos3dvMESA;
 444    exec->WindowPos3fMESA = _mesa_WindowPos3fMESA;
 445    exec->WindowPos3fvMESA = _mesa_WindowPos3fvMESA;
 446    exec->WindowPos3iMESA = _mesa_WindowPos3iMESA;
 447    exec->WindowPos3ivMESA = _mesa_WindowPos3ivMESA;
 448    exec->WindowPos3sMESA = _mesa_WindowPos3sMESA;
 449    exec->WindowPos3svMESA = _mesa_WindowPos3svMESA;
 450    exec->WindowPos4dMESA = _mesa_WindowPos4dMESA;
 451    exec->WindowPos4dvMESA = _mesa_WindowPos4dvMESA;
 452    exec->WindowPos4fMESA = _mesa_WindowPos4fMESA;
 453    exec->WindowPos4fvMESA = _mesa_WindowPos4fvMESA;
 454    exec->WindowPos4iMESA = _mesa_WindowPos4iMESA;
 455    exec->WindowPos4ivMESA = _mesa_WindowPos4ivMESA;
 456    exec->WindowPos4sMESA = _mesa_WindowPos4sMESA;
 457    exec->WindowPos4svMESA = _mesa_WindowPos4svMESA;
 458
 459    /* ARB 1. GL_ARB_multitexture */
 460    exec->ActiveTexture = _mesa_ActiveTextureARB;
 461    exec->ClientActiveTexture = _mesa_ClientActiveTextureARB;
 462
 463    /* ARB 3. GL_ARB_transpose_matrix */
 464    exec->LoadTransposeMatrixd = _mesa_LoadTransposeMatrixdARB;
 465    exec->LoadTransposeMatrixf = _mesa_LoadTransposeMatrixfARB;
 466    exec->MultTransposeMatrixd = _mesa_MultTransposeMatrixdARB;
 467    exec->MultTransposeMatrixf = _mesa_MultTransposeMatrixfARB;
 468
 469    /* ARB 5. GL_ARB_multisample */
 470    exec->SampleCoverage = _mesa_SampleCoverageARB;
 471
 472    /* ARB 12. GL_ARB_texture_compression */
 473    exec->CompressedTexImage3D = _mesa_CompressedTexImage3DARB;
 474    exec->CompressedTexImage2D = _mesa_CompressedTexImage2DARB;
 475    exec->CompressedTexImage1D = _mesa_CompressedTexImage1DARB;
 476    exec->CompressedTexSubImage3D = _mesa_CompressedTexSubImage3DARB;
 477    exec->CompressedTexSubImage2D = _mesa_CompressedTexSubImage2DARB;
 478    exec->CompressedTexSubImage1D = _mesa_CompressedTexSubImage1DARB;
 479    exec->GetCompressedTexImage = _mesa_GetCompressedTexImageARB;
 480
 481    /* GL_ARB_window_pos */
 482    exec->WindowPos2dARB = _mesa_WindowPos2dARB;
 483    exec->WindowPos2dvARB = _mesa_WindowPos2dvARB;
 484    exec->WindowPos2fARB = _mesa_WindowPos2fARB;
 485    exec->WindowPos2fvARB = _mesa_WindowPos2fvARB;
 486    exec->WindowPos2iARB = _mesa_WindowPos2iARB;
 487    exec->WindowPos2ivARB = _mesa_WindowPos2ivARB;
 488    exec->WindowPos2sARB = _mesa_WindowPos2sARB;
 489    exec->WindowPos2svARB = _mesa_WindowPos2svARB;
 490    exec->WindowPos3dARB = _mesa_WindowPos3dARB;
 491    exec->WindowPos3dvARB = _mesa_WindowPos3dvARB;
 492    exec->WindowPos3fARB = _mesa_WindowPos3fARB;
 493    exec->WindowPos3fvARB = _mesa_WindowPos3fvARB;
 494    exec->WindowPos3iARB = _mesa_WindowPos3iARB;
 495    exec->WindowPos3ivARB = _mesa_WindowPos3ivARB;
 496    exec->WindowPos3sARB = _mesa_WindowPos3sARB;
 497    exec->WindowPos3svARB = _mesa_WindowPos3svARB;
 498 }
 499
 500
 501
 502 /**********************************************************************/
 503 /*****                   State update logic                       *****/
 504 /**********************************************************************/
 505
 506
 507 static void
 508 update_polygon( GLcontext *ctx )
 509 {
 510    ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
 511
 512    if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 513       ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
 514
 515    /* Any Polygon offsets enabled? */
 516    ctx->Polygon._OffsetAny = GL_FALSE;
 517    ctx->_TriangleCaps &= ~DD_TRI_OFFSET;
 518
 519    if (ctx->Polygon.OffsetPoint ||
 520        ctx->Polygon.OffsetLine ||
 521        ctx->Polygon.OffsetFill) {
 522       ctx->_TriangleCaps |= DD_TRI_OFFSET;
 523       ctx->Polygon._OffsetAny = GL_TRUE;
 524    }
 525 }
 526
 527 static void
 528 calculate_model_project_matrix( GLcontext *ctx )
 529 {
 530    if (!ctx->_NeedEyeCoords) {
 531       _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix,
 532                                &ctx->ProjectionMatrix,
 533                                &ctx->ModelView );
 534
 535       _math_matrix_analyse( &ctx->_ModelProjectMatrix );
 536    }
 537 }
 538
 539 static void
 540 update_modelview_scale( GLcontext *ctx )
 541 {
 542    ctx->_ModelViewInvScale = 1.0F;
 543    if (ctx->ModelView.flags & (MAT_FLAG_UNIFORM_SCALE |
 544                                MAT_FLAG_GENERAL_SCALE |
 545                                MAT_FLAG_GENERAL_3D |
 546                                MAT_FLAG_GENERAL) ) {
 547       const GLfloat *m = ctx->ModelView.inv;
 548       GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
 549       if (f < 1e-12) f = 1.0;
 550       if (ctx->_NeedEyeCoords)
 551          ctx->_ModelViewInvScale = (GLfloat) (1.0/GL_SQRT(f));
 552       else
 553          ctx->_ModelViewInvScale = (GLfloat) GL_SQRT(f);
 554    }
 555 }
 556
 557
 558 /* Bring uptodate any state that relies on _NeedEyeCoords.
 559  */
 560 static void
 561 update_tnl_spaces( GLcontext *ctx, GLuint oldneedeyecoords )
 562 {
 563    /* Check if the truth-value interpretations of the bitfields have
 564     * changed:
 565     */
 566    if ((oldneedeyecoords == 0) != (ctx->_NeedEyeCoords == 0)) {
 567       /* Recalculate all state that depends on _NeedEyeCoords.
 568        */
 569       update_modelview_scale(ctx);
 570       calculate_model_project_matrix(ctx);
 571       _mesa_compute_light_positions( ctx );
 572
 573       if (ctx->Driver.LightingSpaceChange)
 574          ctx->Driver.LightingSpaceChange( ctx );
 575    }
 576    else {
 577       GLuint new_state = ctx->NewState;
 578
 579       /* Recalculate that same state only if it has been invalidated
 580        * by other statechanges.
 581        */
 582       if (new_state & _NEW_MODELVIEW)
 583          update_modelview_scale(ctx);
 584
 585       if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
 586          calculate_model_project_matrix(ctx);
 587
 588       if (new_state & (_NEW_LIGHT|_NEW_MODELVIEW))
 589          _mesa_compute_light_positions( ctx );
 590    }
 591 }
 592
 593
 594 static void
 595 update_drawbuffer( GLcontext *ctx )
 596 {
 597    ctx->DrawBuffer->_Xmin = 0;
 598    ctx->DrawBuffer->_Ymin = 0;
 599    ctx->DrawBuffer->_Xmax = ctx->DrawBuffer->Width;
 600    ctx->DrawBuffer->_Ymax = ctx->DrawBuffer->Height;
 601    if (ctx->Scissor.Enabled) {
 602       if (ctx->Scissor.X > ctx->DrawBuffer->_Xmin) {
 603          ctx->DrawBuffer->_Xmin = ctx->Scissor.X;
 604       }
 605       if (ctx->Scissor.Y > ctx->DrawBuffer->_Ymin) {
 606          ctx->DrawBuffer->_Ymin = ctx->Scissor.Y;
 607       }
 608       if (ctx->Scissor.X + ctx->Scissor.Width < ctx->DrawBuffer->_Xmax) {
 609          ctx->DrawBuffer->_Xmax = ctx->Scissor.X + ctx->Scissor.Width;
 610       }
 611       if (ctx->Scissor.Y + ctx->Scissor.Height < ctx->DrawBuffer->_Ymax) {
 612          ctx->DrawBuffer->_Ymax = ctx->Scissor.Y + ctx->Scissor.Height;
 613       }
 614    }
 615 }
 616
 617
 618 /* NOTE: This routine references Tranform attribute values to compute
 619  * userclip positions in clip space, but is only called on
 620  * _NEW_PROJECTION.  The _mesa_ClipPlane() function keeps these values
 621  * uptodate across changes to the Transform attributes.
 622  */
 623 static void
 624 update_projection( GLcontext *ctx )
 625 {
 626    _math_matrix_analyse( &ctx->ProjectionMatrix );
 627
 628    /* Recompute clip plane positions in clipspace.  This is also done
 629     * in _mesa_ClipPlane().
 630     */
 631    if (ctx->Transform._AnyClip) {
 632       GLuint p;
 633       for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
 634          if (ctx->Transform.ClipEnabled[p]) {
 635             _mesa_transform_vector( ctx->Transform._ClipUserPlane[p],
 636                                  ctx->Transform.EyeUserPlane[p],
 637                                  ctx->ProjectionMatrix.inv );
 638          }
 639       }
 640    }
 641 }
 642
 643
 644 /*
 645  * Return a bitmask of IMAGE_*_BIT flags which to indicate which
 646  * pixel transfer operations are enabled.
 647  */
 648 static void
 649 update_image_transfer_state(GLcontext *ctx)
 650 {
 651    GLuint mask = 0;
 652
 653    if (ctx->Pixel.RedScale   != 1.0F || ctx->Pixel.RedBias   != 0.0F ||
 654        ctx->Pixel.GreenScale != 1.0F || ctx->Pixel.GreenBias != 0.0F ||
 655        ctx->Pixel.BlueScale  != 1.0F || ctx->Pixel.BlueBias  != 0.0F ||
 656        ctx->Pixel.AlphaScale != 1.0F || ctx->Pixel.AlphaBias != 0.0F)
 657       mask |= IMAGE_SCALE_BIAS_BIT;
 658
 659    if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset)
 660       mask |= IMAGE_SHIFT_OFFSET_BIT;
 661
 662    if (ctx->Pixel.MapColorFlag)
 663       mask |= IMAGE_MAP_COLOR_BIT;
 664
 665    if (ctx->Pixel.ColorTableEnabled)
 666       mask |= IMAGE_COLOR_TABLE_BIT;
 667
 668    if (ctx->Pixel.Convolution1DEnabled ||
 669        ctx->Pixel.Convolution2DEnabled ||
 670        ctx->Pixel.Separable2DEnabled) {
 671       mask |= IMAGE_CONVOLUTION_BIT;
 672       if (ctx->Pixel.PostConvolutionScale[0] != 1.0F ||
 673           ctx->Pixel.PostConvolutionScale[1] != 1.0F ||
 674           ctx->Pixel.PostConvolutionScale[2] != 1.0F ||
 675           ctx->Pixel.PostConvolutionScale[3] != 1.0F ||
 676           ctx->Pixel.PostConvolutionBias[0] != 0.0F ||
 677           ctx->Pixel.PostConvolutionBias[1] != 0.0F ||
 678           ctx->Pixel.PostConvolutionBias[2] != 0.0F ||
 679           ctx->Pixel.PostConvolutionBias[3] != 0.0F) {
 680          mask |= IMAGE_POST_CONVOLUTION_SCALE_BIAS;
 681       }
 682    }
 683
 684    if (ctx->Pixel.PostConvolutionColorTableEnabled)
 685       mask |= IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT;
 686
 687    if (ctx->ColorMatrix.type != MATRIX_IDENTITY ||
 688        ctx->Pixel.PostColorMatrixScale[0] != 1.0F ||
 689        ctx->Pixel.PostColorMatrixBias[0]  != 0.0F ||
 690        ctx->Pixel.PostColorMatrixScale[1] != 1.0F ||
 691        ctx->Pixel.PostColorMatrixBias[1]  != 0.0F ||
 692        ctx->Pixel.PostColorMatrixScale[2] != 1.0F ||
 693        ctx->Pixel.PostColorMatrixBias[2]  != 0.0F ||
 694        ctx->Pixel.PostColorMatrixScale[3] != 1.0F ||
 695        ctx->Pixel.PostColorMatrixBias[3]  != 0.0F)
 696       mask |= IMAGE_COLOR_MATRIX_BIT;
 697
 698    if (ctx->Pixel.PostColorMatrixColorTableEnabled)
 699       mask |= IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT;
 700
 701    if (ctx->Pixel.HistogramEnabled)
 702       mask |= IMAGE_HISTOGRAM_BIT;
 703
 704    if (ctx->Pixel.MinMaxEnabled)
 705       mask |= IMAGE_MIN_MAX_BIT;
 706
 707    ctx->_ImageTransferState = mask;
 708 }
 709
 710
 711
 712
 713 /* Note: This routine refers to derived texture attribute values to
 714  * compute the ENABLE_TEXMAT flags, but is only called on
 715  * _NEW_TEXTURE_MATRIX.  On changes to _NEW_TEXTURE, the ENABLE_TEXMAT
 716  * flags are updated by _mesa_update_textures(), below.
 717  *
 718  * If both TEXTURE and TEXTURE_MATRIX change at once, these values
 719  * will be computed twice.
 720  */
 721 static void
 722 update_texture_matrices( GLcontext *ctx )
 723 {
 724    GLuint i;
 725
 726    ctx->Texture._TexMatEnabled = 0;
 727
 728    for (i=0; i < ctx->Const.MaxTextureUnits; i++) {
 729       if (ctx->TextureMatrix[i].flags & MAT_DIRTY) {
 730          _math_matrix_analyse( &ctx->TextureMatrix[i] );
 731
 732          if (ctx->Driver.TextureMatrix)
 733             ctx->Driver.TextureMatrix( ctx, i, &ctx->TextureMatrix[i] );
 734
 735          if (ctx->Texture.Unit[i]._ReallyEnabled &&
 736              ctx->TextureMatrix[i].type != MATRIX_IDENTITY)
 737             ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i);
 738       }
 739    }
 740 }
 741
 742
 743 /* Note: This routine refers to derived texture matrix values to
 744  * compute the ENABLE_TEXMAT flags, but is only called on
 745  * _NEW_TEXTURE.  On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
 746  * flags are updated by _mesa_update_texture_matrices, above.
 747  *
 748  * If both TEXTURE and TEXTURE_MATRIX change at once, these values
 749  * will be computed twice.
 750  */
 751 static void
 752 update_texture_state( GLcontext *ctx )
 753 {
 754    GLuint i;
 755
 756    ctx->Texture._ReallyEnabled = 0;
 757    ctx->Texture._GenFlags = 0;
 758    ctx->_NeedNormals &= ~NEED_NORMALS_TEXGEN;
 759    ctx->_NeedEyeCoords &= ~NEED_EYE_TEXGEN;
 760    ctx->Texture._TexMatEnabled = 0;
 761    ctx->Texture._TexGenEnabled = 0;
 762
 763    /* Update texture unit state.
 764     */
 765    for (i=0; i < ctx->Const.MaxTextureUnits; i++) {
 766       struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
 767
 768       texUnit->_ReallyEnabled = 0;
 769       texUnit->_GenFlags = 0;
 770
 771       if (!texUnit->Enabled)
 772          continue;
 773
 774       /* Find the texture of highest dimensionality that is enabled
 775        * and complete.  We'll use it for texturing.
 776        */
 777       if (texUnit->Enabled & TEXTURE0_CUBE) {
 778          struct gl_texture_object *texObj = texUnit->CurrentCubeMap;
 779          if (!texObj->Complete) {
 780             _mesa_test_texobj_completeness(ctx, texObj);
 781          }
 782          if (texObj->Complete) {
 783             texUnit->_ReallyEnabled = TEXTURE0_CUBE;
 784             texUnit->_Current = texObj;
 785          }
 786       }
 787
 788       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_3D)) {
 789          struct gl_texture_object *texObj = texUnit->Current3D;
 790          if (!texObj->Complete) {
 791             _mesa_test_texobj_completeness(ctx, texObj);
 792          }
 793          if (texObj->Complete) {
 794             texUnit->_ReallyEnabled = TEXTURE0_3D;
 795             texUnit->_Current = texObj;
 796          }
 797       }
 798
 799       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_2D)) {
 800          struct gl_texture_object *texObj = texUnit->Current2D;
 801          if (!texObj->Complete) {
 802             _mesa_test_texobj_completeness(ctx, texObj);
 803          }
 804          if (texObj->Complete) {
 805             texUnit->_ReallyEnabled = TEXTURE0_2D;
 806             texUnit->_Current = texObj;
 807          }
 808       }
 809
 810       if (!texUnit->_ReallyEnabled && (texUnit->Enabled & TEXTURE0_1D)) {
 811          struct gl_texture_object *texObj = texUnit->Current1D;
 812          if (!texObj->Complete) {
 813             _mesa_test_texobj_completeness(ctx, texObj);
 814          }
 815          if (texObj->Complete) {
 816             texUnit->_ReallyEnabled = TEXTURE0_1D;
 817             texUnit->_Current = texObj;
 818          }
 819       }
 820
 821       if (!texUnit->_ReallyEnabled) {
 822          texUnit->_Current = NULL;
 823          continue;
 824       }
 825
 826       {
 827          GLuint flag = texUnit->_ReallyEnabled << (i * 4);
 828          ctx->Texture._ReallyEnabled |= flag;
 829       }
 830
 831       if (texUnit->TexGenEnabled) {
 832          if (texUnit->TexGenEnabled & S_BIT) {
 833             texUnit->_GenFlags |= texUnit->_GenBitS;
 834          }
 835          if (texUnit->TexGenEnabled & T_BIT) {
 836             texUnit->_GenFlags |= texUnit->_GenBitT;
 837          }
 838          if (texUnit->TexGenEnabled & Q_BIT) {
 839             texUnit->_GenFlags |= texUnit->_GenBitQ;
 840          }
 841          if (texUnit->TexGenEnabled & R_BIT) {
 842             texUnit->_GenFlags |= texUnit->_GenBitR;
 843          }
 844
 845          ctx->Texture._TexGenEnabled |= ENABLE_TEXGEN(i);
 846          ctx->Texture._GenFlags |= texUnit->_GenFlags;
 847       }
 848
 849       if (ctx->TextureMatrix[i].type != MATRIX_IDENTITY)
 850          ctx->Texture._TexMatEnabled |= ENABLE_TEXMAT(i);
 851    }
 852
 853    if (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS) {
 854       ctx->_NeedNormals |= NEED_NORMALS_TEXGEN;
 855       ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
 856    }
 857
 858    if (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) {
 859       ctx->_NeedEyeCoords |= NEED_EYE_TEXGEN;
 860    }
 861 }
 862
 863
 864 /*
 865  * If ctx->NewState is non-zero then this function MUST be called before
 866  * rendering any primitive.  Basically, function pointers and miscellaneous
 867  * flags are updated to reflect the current state of the state machine.
 868  *
 869  * The above constraint is now maintained largely by the two Exec
 870  * dispatch tables, which trigger the appropriate flush on transition
 871  * between State and Geometry modes.
 872  *
 873  * Special care is taken with the derived value _NeedEyeCoords.  This
 874  * is a bitflag which is updated with information from a number of
 875  * attribute groups (MODELVIEW, LIGHT, TEXTURE).  A lot of derived
 876  * state references this value, and must be treated with care to
 877  * ensure that updates are done correctly.  All state dependent on
 878  * _NeedEyeCoords is calculated from within _mesa_update_tnl_spaces(),
 879  * and from nowhere else.
 880  */
 881 void _mesa_update_state( GLcontext *ctx )
 882 {
 883    const GLuint new_state = ctx->NewState;
 884    const GLuint oldneedeyecoords = ctx->_NeedEyeCoords;
 885
 886    if (MESA_VERBOSE & VERBOSE_STATE)
 887       _mesa_print_state("", new_state);
 888
 889    if (new_state & _NEW_MODELVIEW)
 890       _math_matrix_analyse( &ctx->ModelView );
 891
 892    if (new_state & _NEW_PROJECTION)
 893       update_projection( ctx );
 894
 895    if (new_state & _NEW_TEXTURE_MATRIX)
 896       update_texture_matrices( ctx );
 897
 898    if (new_state & _NEW_COLOR_MATRIX)
 899       _math_matrix_analyse( &ctx->ColorMatrix );
 900
 901    /* References ColorMatrix.type (derived above).
 902     */
 903    if (new_state & _IMAGE_NEW_TRANSFER_STATE)
 904       update_image_transfer_state(ctx);
 905
 906    /* Contributes to NeedEyeCoords, NeedNormals.
 907     */
 908    if (new_state & _NEW_TEXTURE)
 909       update_texture_state( ctx );
 910
 911    if (new_state & (_NEW_BUFFERS|_NEW_SCISSOR))
 912       update_drawbuffer( ctx );
 913
 914    if (new_state & _NEW_POLYGON)
 915       update_polygon( ctx );
 916
 917    /* Contributes to NeedEyeCoords, NeedNormals.
 918     */
 919    if (new_state & _NEW_LIGHT)
 920       _mesa_update_lighting( ctx );
 921
 922    /* We can light in object space if the modelview matrix preserves
 923     * lengths and relative angles.
 924     */
 925    if (new_state & (_NEW_MODELVIEW|_NEW_LIGHT)) {
 926       ctx->_NeedEyeCoords &= ~NEED_EYE_LIGHT_MODELVIEW;
 927       if (ctx->Light.Enabled &&
 928           !TEST_MAT_FLAGS( &ctx->ModelView, MAT_FLAGS_LENGTH_PRESERVING))
 929             ctx->_NeedEyeCoords |= NEED_EYE_LIGHT_MODELVIEW;
 930    }
 931
 932
 933    /* ctx->_NeedEyeCoords is now uptodate.
 934     *
 935     * If the truth value of this variable has changed, update for the
 936     * new lighting space and recompute the positions of lights and the
 937     * normal transform.
 938     *
 939     * If the lighting space hasn't changed, may still need to recompute
 940     * light positions & normal transforms for other reasons.
 941     */
 942    if (new_state & (_NEW_MODELVIEW |
 943                     _NEW_PROJECTION |
 944                     _NEW_LIGHT |
 945                     _MESA_NEW_NEED_EYE_COORDS))
 946       update_tnl_spaces( ctx, oldneedeyecoords );
 947
 948    /*
 949     * Here the driver sets up all the ctx->Driver function pointers
 950     * to it's specific, private functions, and performs any
 951     * internal state management necessary, including invalidating
 952     * state of active modules.
 953     *
 954     * Set ctx->NewState to zero to avoid recursion if
 955     * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
 956     */
 957    ctx->NewState = 0;
 958    ctx->Driver.UpdateState(ctx, new_state);
 959    ctx->Array.NewState = 0;
 960
 961    /* At this point we can do some assertions to be sure the required
 962     * device driver function pointers are all initialized.
 963     */
 964    ASSERT(ctx->Driver.GetString);
 965    ASSERT(ctx->Driver.UpdateState);
 966    ASSERT(ctx->Driver.Clear);
 967    ASSERT(ctx->Driver.SetDrawBuffer);
 968    ASSERT(ctx->Driver.GetBufferSize);
 969    if (ctx->Visual.accumRedBits > 0) {
 970       ASSERT(ctx->Driver.Accum);
 971    }
 972    ASSERT(ctx->Driver.DrawPixels);
 973    ASSERT(ctx->Driver.ReadPixels);
 974    ASSERT(ctx->Driver.CopyPixels);
 975    ASSERT(ctx->Driver.Bitmap);
 976    ASSERT(ctx->Driver.ResizeBuffersMESA);
 977    ASSERT(ctx->Driver.TexImage1D);
 978    ASSERT(ctx->Driver.TexImage2D);
 979    ASSERT(ctx->Driver.TexImage3D);
 980    ASSERT(ctx->Driver.TexSubImage1D);
 981    ASSERT(ctx->Driver.TexSubImage2D);
 982    ASSERT(ctx->Driver.TexSubImage3D);
 983    ASSERT(ctx->Driver.CopyTexImage1D);
 984    ASSERT(ctx->Driver.CopyTexImage2D);
 985    ASSERT(ctx->Driver.CopyTexSubImage1D);
 986    ASSERT(ctx->Driver.CopyTexSubImage2D);
 987    ASSERT(ctx->Driver.CopyTexSubImage3D);
 988    if (ctx->Extensions.ARB_texture_compression) {
 989       ASSERT(ctx->Driver.BaseCompressedTexFormat);
 990       ASSERT(ctx->Driver.CompressedTextureSize);
 991       ASSERT(ctx->Driver.GetCompressedTexImage);
 992 #if 0  /* HW drivers need these, but not SW rasterizers */
 993       ASSERT(ctx->Driver.CompressedTexImage1D);
 994       ASSERT(ctx->Driver.CompressedTexImage2D);
 995       ASSERT(ctx->Driver.CompressedTexImage3D);
 996       ASSERT(ctx->Driver.CompressedTexSubImage1D);
 997       ASSERT(ctx->Driver.CompressedTexSubImage2D);
 998       ASSERT(ctx->Driver.CompressedTexSubImage3D);
 999 #endif
1000    }
1001 }