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/* $Id: vtxfmt.c,v 1.1 2003-02-28 11:42:07 pj Exp $ */

/*

 * Mesa 3-D graphics library

 * Version:  4.1

 *

 * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 * Authors:

 *    Keith Whitwell <keith@tungstengraphics.com>

 *    Gareth Hughes

 */

#include "glheader.h"

#include "api_loopback.h"

#include "context.h"

#include "imports.h"

#include "mtypes.h"

#include "state.h"

#include "vtxfmt.h"

/* The neutral vertex format.  This wraps all tnl module functions,

 * verifying that the currently-installed module is valid and then

 * installing the function pointers in a lazy fashion.  It records the

 * function pointers that have been swapped out, which allows a fast

 * restoration of the neutral module in almost all cases -- a typical

 * app might only require 4-6 functions to be modified from the neutral

 * baseline, and only restoring these is certainly preferable to doing

 * the entire module's 60 or so function pointers.

 */

#define PRE_LOOPBACK( FUNC )                                            \

{                                                                       \

   GET_CURRENT_CONTEXT(ctx);                                            \

   struct gl_tnl_module *tnl = &(ctx->TnlModule);                       \

                                                                        \

   ASSERT( tnl->Current );                                              \

   ASSERT( tnl->SwapCount < NUM_VERTEX_FORMAT_ENTRIES );                \

                                                                        \

   /* Save the swapped function's dispatch entry so it can be */        \

   /* restored later. */                                                \

   tnl->Swapped[tnl->SwapCount][0] = (void *)&(ctx->Exec->FUNC);        \

   tnl->Swapped[tnl->SwapCount][1] = (void *)TAG(FUNC);                 \

   tnl->SwapCount++;                                                    \

                                                                        \

   if ( 0 )                                                             \

      _mesa_debug(ctx, "   swapping gl" #FUNC"...\n" );                 \

                                                                        \

   /* Install the tnl function pointer. */                              \

   ctx->Exec->FUNC = tnl->Current->FUNC;                                \

}

#define TAG(x) neutral_##x

#include "vtxfmt_tmp.h"

static void install_vtxfmt( struct _glapi_table *tab, GLvertexformat *vfmt )

{

   tab->ArrayElement = vfmt->ArrayElement;

   tab->Color3f = vfmt->Color3f;

   tab->Color3fv = vfmt->Color3fv;

   tab->Color3ub = vfmt->Color3ub;

   tab->Color3ubv = vfmt->Color3ubv;

   tab->Color4f = vfmt->Color4f;

   tab->Color4fv = vfmt->Color4fv;

   tab->Color4ub = vfmt->Color4ub;

   tab->Color4ubv = vfmt->Color4ubv;

   tab->EdgeFlag = vfmt->EdgeFlag;

   tab->EdgeFlagv = vfmt->EdgeFlagv;

   tab->EvalCoord1f = vfmt->EvalCoord1f;

   tab->EvalCoord1fv = vfmt->EvalCoord1fv;

   tab->EvalCoord2f = vfmt->EvalCoord2f;

   tab->EvalCoord2fv = vfmt->EvalCoord2fv;

   tab->EvalPoint1 = vfmt->EvalPoint1;

   tab->EvalPoint2 = vfmt->EvalPoint2;

   tab->FogCoordfEXT = vfmt->FogCoordfEXT;

   tab->FogCoordfvEXT = vfmt->FogCoordfvEXT;

   tab->Indexi = vfmt->Indexi;

   tab->Indexiv = vfmt->Indexiv;

   tab->Materialfv = vfmt->Materialfv;

   tab->MultiTexCoord1fARB = vfmt->MultiTexCoord1fARB;

   tab->MultiTexCoord1fvARB = vfmt->MultiTexCoord1fvARB;

   tab->MultiTexCoord2fARB = vfmt->MultiTexCoord2fARB;

   tab->MultiTexCoord2fvARB = vfmt->MultiTexCoord2fvARB;

   tab->MultiTexCoord3fARB = vfmt->MultiTexCoord3fARB;

   tab->MultiTexCoord3fvARB = vfmt->MultiTexCoord3fvARB;

   tab->MultiTexCoord4fARB = vfmt->MultiTexCoord4fARB;

   tab->MultiTexCoord4fvARB = vfmt->MultiTexCoord4fvARB;

   tab->Normal3f = vfmt->Normal3f;

   tab->Normal3fv = vfmt->Normal3fv;

   tab->SecondaryColor3fEXT = vfmt->SecondaryColor3fEXT;

   tab->SecondaryColor3fvEXT = vfmt->SecondaryColor3fvEXT;

   tab->SecondaryColor3ubEXT = vfmt->SecondaryColor3ubEXT;

   tab->SecondaryColor3ubvEXT = vfmt->SecondaryColor3ubvEXT;

   tab->TexCoord1f = vfmt->TexCoord1f;

   tab->TexCoord1fv = vfmt->TexCoord1fv;

   tab->TexCoord2f = vfmt->TexCoord2f;

   tab->TexCoord2fv = vfmt->TexCoord2fv;

   tab->TexCoord3f = vfmt->TexCoord3f;

   tab->TexCoord3fv = vfmt->TexCoord3fv;

   tab->TexCoord4f = vfmt->TexCoord4f;

   tab->TexCoord4fv = vfmt->TexCoord4fv;

   tab->Vertex2f = vfmt->Vertex2f;

   tab->Vertex2fv = vfmt->Vertex2fv;

   tab->Vertex3f = vfmt->Vertex3f;

   tab->Vertex3fv = vfmt->Vertex3fv;

   tab->Vertex4f = vfmt->Vertex4f;

   tab->Vertex4fv = vfmt->Vertex4fv;

   tab->CallList = vfmt->CallList;

   tab->Begin = vfmt->Begin;

   tab->End = vfmt->End;

   tab->VertexAttrib4fNV = vfmt->VertexAttrib4fNV;

   tab->Rectf = vfmt->Rectf;

   tab->DrawArrays = vfmt->DrawArrays;

   tab->DrawElements = vfmt->DrawElements;

   tab->DrawRangeElements = vfmt->DrawRangeElements;

   tab->EvalMesh1 = vfmt->EvalMesh1;

   tab->EvalMesh2 = vfmt->EvalMesh2;

   assert(tab->EvalMesh2);

}

void _mesa_init_exec_vtxfmt( GLcontext *ctx )

{

   install_vtxfmt( ctx->Exec, &neutral_vtxfmt );

   ctx->TnlModule.SwapCount = 0;

}

void _mesa_install_exec_vtxfmt( GLcontext *ctx, GLvertexformat *vfmt )

{

   ctx->TnlModule.Current = vfmt;

   _mesa_restore_exec_vtxfmt( ctx );

   if ( ctx->ExecPrefersFloat != vfmt->prefer_float_colors )

      _mesa_loopback_prefer_float( ctx->Exec, vfmt->prefer_float_colors );

}

void _mesa_install_save_vtxfmt( GLcontext *ctx, GLvertexformat *vfmt )

{

   install_vtxfmt( ctx->Save, vfmt );

   if ( ctx->SavePrefersFloat != vfmt->prefer_float_colors )

      _mesa_loopback_prefer_float( ctx->Save, vfmt->prefer_float_colors );

}

void _mesa_restore_exec_vtxfmt( GLcontext *ctx )

{

   struct gl_tnl_module *tnl = &(ctx->TnlModule);

   GLuint i;

   /* Restore the neutral tnl module wrapper.

    */

   for ( i = 0 ; i < tnl->SwapCount ; i++ ) {

      *(void **)tnl->Swapped[i][0] = tnl->Swapped[i][1];

   }

   tnl->SwapCount = 0;

}