src/mesa/main/vtxfmt.c

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  4.1
   5  *
   6  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Keith Whitwell <keith@tungstengraphics.com>
  27  *    Gareth Hughes
  28  */
  29
  30 #include "glheader.h"
  31 #include "api_loopback.h"
  32 #include "context.h"
  33 #include "imports.h"
  34 #include "mtypes.h"
  35 #include "state.h"
  36 #include "vtxfmt.h"
  37
  38
  39 /* The neutral vertex format.  This wraps all tnl module functions,
  40  * verifying that the currently-installed module is valid and then
  41  * installing the function pointers in a lazy fashion.  It records the
  42  * function pointers that have been swapped out, which allows a fast
  43  * restoration of the neutral module in almost all cases -- a typical
  44  * app might only require 4-6 functions to be modified from the neutral
  45  * baseline, and only restoring these is certainly preferable to doing
  46  * the entire module's 60 or so function pointers.
  47  */
  48
  49 #define PRE_LOOPBACK( FUNC )                                            \
  50 {                                                                       \
  51    GET_CURRENT_CONTEXT(ctx);                                            \
  52    struct gl_tnl_module *tnl = &(ctx->TnlModule);                       \
  53                                                                         \
  54    ASSERT( tnl->Current );                                              \
  55    ASSERT( tnl->SwapCount < NUM_VERTEX_FORMAT_ENTRIES );                \
  56                                                                         \
  57    /* Save the swapped function's dispatch entry so it can be */        \
  58    /* restored later. */                                                \
  59    tnl->Swapped[tnl->SwapCount][0] = (void *)&(ctx->Exec->FUNC);        \
  60    tnl->Swapped[tnl->SwapCount][1] = (void *)TAG(FUNC);                 \
  61    tnl->SwapCount++;                                                    \
  62                                                                         \
  63    if ( 0 )                                                             \
  64       _mesa_debug(ctx, "   swapping gl" #FUNC"...\n" );                 \
  65                                                                         \
  66    /* Install the tnl function pointer. */                              \
  67    ctx->Exec->FUNC = tnl->Current->FUNC;                                \
  68 }
  69
  70 #define TAG(x) neutral_##x
  71 #include "vtxfmt_tmp.h"
  72
  73
  74
  75 static void install_vtxfmt( struct _glapi_table *tab, GLvertexformat *vfmt )
  76 {
  77    tab->ArrayElement = vfmt->ArrayElement;
  78    tab->Color3f = vfmt->Color3f;
  79    tab->Color3fv = vfmt->Color3fv;
  80    tab->Color4f = vfmt->Color4f;
  81    tab->Color4fv = vfmt->Color4fv;
  82    tab->EdgeFlag = vfmt->EdgeFlag;
  83    tab->EdgeFlagv = vfmt->EdgeFlagv;
  84    tab->EvalCoord1f = vfmt->EvalCoord1f;
  85    tab->EvalCoord1fv = vfmt->EvalCoord1fv;
  86    tab->EvalCoord2f = vfmt->EvalCoord2f;
  87    tab->EvalCoord2fv = vfmt->EvalCoord2fv;
  88    tab->EvalPoint1 = vfmt->EvalPoint1;
  89    tab->EvalPoint2 = vfmt->EvalPoint2;
  90    tab->FogCoordfEXT = vfmt->FogCoordfEXT;
  91    tab->FogCoordfvEXT = vfmt->FogCoordfvEXT;
  92    tab->Indexf = vfmt->Indexf;
  93    tab->Indexfv = vfmt->Indexfv;
  94    tab->Materialfv = vfmt->Materialfv;
  95    tab->MultiTexCoord1fARB = vfmt->MultiTexCoord1fARB;
  96    tab->MultiTexCoord1fvARB = vfmt->MultiTexCoord1fvARB;
  97    tab->MultiTexCoord2fARB = vfmt->MultiTexCoord2fARB;
  98    tab->MultiTexCoord2fvARB = vfmt->MultiTexCoord2fvARB;
  99    tab->MultiTexCoord3fARB = vfmt->MultiTexCoord3fARB;
 100    tab->MultiTexCoord3fvARB = vfmt->MultiTexCoord3fvARB;
 101    tab->MultiTexCoord4fARB = vfmt->MultiTexCoord4fARB;
 102    tab->MultiTexCoord4fvARB = vfmt->MultiTexCoord4fvARB;
 103    tab->Normal3f = vfmt->Normal3f;
 104    tab->Normal3fv = vfmt->Normal3fv;
 105    tab->SecondaryColor3fEXT = vfmt->SecondaryColor3fEXT;
 106    tab->SecondaryColor3fvEXT = vfmt->SecondaryColor3fvEXT;
 107    tab->TexCoord1f = vfmt->TexCoord1f;
 108    tab->TexCoord1fv = vfmt->TexCoord1fv;
 109    tab->TexCoord2f = vfmt->TexCoord2f;
 110    tab->TexCoord2fv = vfmt->TexCoord2fv;
 111    tab->TexCoord3f = vfmt->TexCoord3f;
 112    tab->TexCoord3fv = vfmt->TexCoord3fv;
 113    tab->TexCoord4f = vfmt->TexCoord4f;
 114    tab->TexCoord4fv = vfmt->TexCoord4fv;
 115    tab->Vertex2f = vfmt->Vertex2f;
 116    tab->Vertex2fv = vfmt->Vertex2fv;
 117    tab->Vertex3f = vfmt->Vertex3f;
 118    tab->Vertex3fv = vfmt->Vertex3fv;
 119    tab->Vertex4f = vfmt->Vertex4f;
 120    tab->Vertex4fv = vfmt->Vertex4fv;
 121    tab->CallList = vfmt->CallList;
 122    tab->CallLists = vfmt->CallLists;
 123    tab->Begin = vfmt->Begin;
 124    tab->End = vfmt->End;
 125    tab->VertexAttrib1fNV = vfmt->VertexAttrib1fNV;
 126    tab->VertexAttrib1fvNV = vfmt->VertexAttrib1fvNV;
 127    tab->VertexAttrib2fNV = vfmt->VertexAttrib2fNV;
 128    tab->VertexAttrib2fvNV = vfmt->VertexAttrib2fvNV;
 129    tab->VertexAttrib3fNV = vfmt->VertexAttrib3fNV;
 130    tab->VertexAttrib3fvNV = vfmt->VertexAttrib3fvNV;
 131    tab->VertexAttrib4fNV = vfmt->VertexAttrib4fNV;
 132    tab->VertexAttrib4fvNV = vfmt->VertexAttrib4fvNV;
 133    tab->Rectf = vfmt->Rectf;
 134    tab->DrawArrays = vfmt->DrawArrays;
 135    tab->DrawElements = vfmt->DrawElements;
 136    tab->DrawRangeElements = vfmt->DrawRangeElements;
 137    tab->EvalMesh1 = vfmt->EvalMesh1;
 138    tab->EvalMesh2 = vfmt->EvalMesh2;
 139    assert(tab->EvalMesh2);
 140 }
 141
 142
 143 void _mesa_init_exec_vtxfmt( GLcontext *ctx )
 144 {
 145    install_vtxfmt( ctx->Exec, &neutral_vtxfmt );
 146    ctx->TnlModule.SwapCount = 0;
 147 }
 148
 149
 150 void _mesa_install_exec_vtxfmt( GLcontext *ctx, GLvertexformat *vfmt )
 151 {
 152    ctx->TnlModule.Current = vfmt;
 153    _mesa_restore_exec_vtxfmt( ctx );
 154 }
 155
 156 void _mesa_install_save_vtxfmt( GLcontext *ctx, GLvertexformat *vfmt )
 157 {
 158    install_vtxfmt( ctx->Save, vfmt );
 159 }
 160
 161
 162 void _mesa_restore_exec_vtxfmt( GLcontext *ctx )
 163 {
 164    struct gl_tnl_module *tnl = &(ctx->TnlModule);
 165    GLuint i;
 166
 167    /* Restore the neutral tnl module wrapper.
 168     */
 169    for ( i = 0 ; i < tnl->SwapCount ; i++ ) {
 170       *(void **)tnl->Swapped[i][0] = tnl->Swapped[i][1];
 171    }
 172
 173    tnl->SwapCount = 0;
 174 }