src/mesa/main/vtxfmt.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.1
   4  *
   5  * Copyright (C) 1999-2004  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  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  *    Gareth Hughes
  27  */
  28
  29 #include "glheader.h"
  30 #include "api_loopback.h"
  31 #include "context.h"
  32 #include "imports.h"
  33 #include "mtypes.h"
  34 #include "state.h"
  35 #include "vtxfmt.h"
  36
  37
  38 /* The neutral vertex format.  This wraps all tnl module functions,
  39  * verifying that the currently-installed module is valid and then
  40  * installing the function pointers in a lazy fashion.  It records the
  41  * function pointers that have been swapped out, which allows a fast
  42  * restoration of the neutral module in almost all cases -- a typical
  43  * app might only require 4-6 functions to be modified from the neutral
  44  * baseline, and only restoring these is certainly preferable to doing
  45  * the entire module's 60 or so function pointers.
  46  */
  47
  48 #define PRE_LOOPBACK( FUNC )                                            \
  49 {                                                                       \
  50    GET_CURRENT_CONTEXT(ctx);                                            \
  51    struct gl_tnl_module *tnl = &(ctx->TnlModule);                       \
  52    typedef void (*func_ptr_t)();                                        \
  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    *(func_ptr_t *)(tnl->Swapped[tnl->SwapCount]+1) = (func_ptr_t)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
  76 install_vtxfmt( struct _glapi_table *tab, const GLvertexformat *vfmt )
  77 {
  78    tab->ArrayElement = vfmt->ArrayElement;
  79    tab->Color3f = vfmt->Color3f;
  80    tab->Color3fv = vfmt->Color3fv;
  81    tab->Color4f = vfmt->Color4f;
  82    tab->Color4fv = vfmt->Color4fv;
  83    tab->EdgeFlag = vfmt->EdgeFlag;
  84    tab->EdgeFlagv = vfmt->EdgeFlagv;
  85    tab->EvalCoord1f = vfmt->EvalCoord1f;
  86    tab->EvalCoord1fv = vfmt->EvalCoord1fv;
  87    tab->EvalCoord2f = vfmt->EvalCoord2f;
  88    tab->EvalCoord2fv = vfmt->EvalCoord2fv;
  89    tab->EvalPoint1 = vfmt->EvalPoint1;
  90    tab->EvalPoint2 = vfmt->EvalPoint2;
  91    tab->FogCoordfEXT = vfmt->FogCoordfEXT;
  92    tab->FogCoordfvEXT = vfmt->FogCoordfvEXT;
  93    tab->Indexf = vfmt->Indexf;
  94    tab->Indexfv = vfmt->Indexfv;
  95    tab->Materialfv = vfmt->Materialfv;
  96    tab->MultiTexCoord1fARB = vfmt->MultiTexCoord1fARB;
  97    tab->MultiTexCoord1fvARB = vfmt->MultiTexCoord1fvARB;
  98    tab->MultiTexCoord2fARB = vfmt->MultiTexCoord2fARB;
  99    tab->MultiTexCoord2fvARB = vfmt->MultiTexCoord2fvARB;
 100    tab->MultiTexCoord3fARB = vfmt->MultiTexCoord3fARB;
 101    tab->MultiTexCoord3fvARB = vfmt->MultiTexCoord3fvARB;
 102    tab->MultiTexCoord4fARB = vfmt->MultiTexCoord4fARB;
 103    tab->MultiTexCoord4fvARB = vfmt->MultiTexCoord4fvARB;
 104    tab->Normal3f = vfmt->Normal3f;
 105    tab->Normal3fv = vfmt->Normal3fv;
 106    tab->SecondaryColor3fEXT = vfmt->SecondaryColor3fEXT;
 107    tab->SecondaryColor3fvEXT = vfmt->SecondaryColor3fvEXT;
 108    tab->TexCoord1f = vfmt->TexCoord1f;
 109    tab->TexCoord1fv = vfmt->TexCoord1fv;
 110    tab->TexCoord2f = vfmt->TexCoord2f;
 111    tab->TexCoord2fv = vfmt->TexCoord2fv;
 112    tab->TexCoord3f = vfmt->TexCoord3f;
 113    tab->TexCoord3fv = vfmt->TexCoord3fv;
 114    tab->TexCoord4f = vfmt->TexCoord4f;
 115    tab->TexCoord4fv = vfmt->TexCoord4fv;
 116    tab->Vertex2f = vfmt->Vertex2f;
 117    tab->Vertex2fv = vfmt->Vertex2fv;
 118    tab->Vertex3f = vfmt->Vertex3f;
 119    tab->Vertex3fv = vfmt->Vertex3fv;
 120    tab->Vertex4f = vfmt->Vertex4f;
 121    tab->Vertex4fv = vfmt->Vertex4fv;
 122    tab->CallList = vfmt->CallList;
 123    tab->CallLists = vfmt->CallLists;
 124    tab->Begin = vfmt->Begin;
 125    tab->End = vfmt->End;
 126    tab->VertexAttrib1fNV = vfmt->VertexAttrib1fNV;
 127    tab->VertexAttrib1fvNV = vfmt->VertexAttrib1fvNV;
 128    tab->VertexAttrib2fNV = vfmt->VertexAttrib2fNV;
 129    tab->VertexAttrib2fvNV = vfmt->VertexAttrib2fvNV;
 130    tab->VertexAttrib3fNV = vfmt->VertexAttrib3fNV;
 131    tab->VertexAttrib3fvNV = vfmt->VertexAttrib3fvNV;
 132    tab->VertexAttrib4fNV = vfmt->VertexAttrib4fNV;
 133    tab->VertexAttrib4fvNV = vfmt->VertexAttrib4fvNV;
 134    tab->Rectf = vfmt->Rectf;
 135    tab->DrawArrays = vfmt->DrawArrays;
 136    tab->DrawElements = vfmt->DrawElements;
 137    tab->DrawRangeElements = vfmt->DrawRangeElements;
 138    tab->EvalMesh1 = vfmt->EvalMesh1;
 139    tab->EvalMesh2 = vfmt->EvalMesh2;
 140    ASSERT(tab->EvalMesh2);
 141 }
 142
 143
 144 void _mesa_init_exec_vtxfmt( GLcontext *ctx )
 145 {
 146    install_vtxfmt( ctx->Exec, &neutral_vtxfmt );
 147    ctx->TnlModule.SwapCount = 0;
 148 }
 149
 150
 151 void _mesa_install_exec_vtxfmt( GLcontext *ctx, const GLvertexformat *vfmt )
 152 {
 153    ctx->TnlModule.Current = vfmt;
 154    _mesa_restore_exec_vtxfmt( ctx );
 155 }
 156
 157
 158 void _mesa_install_save_vtxfmt( GLcontext *ctx, const GLvertexformat *vfmt )
 159 {
 160    install_vtxfmt( ctx->Save, vfmt );
 161 }
 162
 163
 164 void _mesa_restore_exec_vtxfmt( GLcontext *ctx )
 165 {
 166    struct gl_tnl_module *tnl = &(ctx->TnlModule);
 167    GLuint i;
 168
 169    /* Restore the neutral tnl module wrapper.
 170     */
 171    for ( i = 0 ; i < tnl->SwapCount ; i++ ) {
 172       *(void **)tnl->Swapped[i][0] = tnl->Swapped[i][1];
 173    }
 174
 175    tnl->SwapCount = 0;
 176 }