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      1 /*
      2  * Mesa 3-D graphics library
      3  * Version:  7.1
      4  *
      5  * Copyright (C) 2007  Tungsten Graphics   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  * TUNGSTEN GRAPHICS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     21  * 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 
     26 /**
     27  * \file t_vp_build.c
     28  * Create a vertex program to execute the current fixed function T&L pipeline.
     29  * \author Keith Whitwell
     30  */
     31 
     32 
     33 #include "main/glheader.h"
     34 #include "main/ffvertex_prog.h"
     35 #include "main/mtypes.h"
     36 #include "t_vp_build.h"
     37 
     38 
     39 /**
     40  * XXX This should go away someday, but still referenced by some drivers...
     41  */
     42 void _tnl_UpdateFixedFunctionProgram( struct gl_context *ctx )
     43 {
     44    const struct gl_vertex_program *prev = ctx->VertexProgram._Current;
     45 
     46    if (!ctx->VertexProgram._Current ||
     47        ctx->VertexProgram._Current == ctx->VertexProgram._TnlProgram) {
     48       ctx->VertexProgram._Current
     49          = ctx->VertexProgram._TnlProgram
     50          = _mesa_get_fixed_func_vertex_program(ctx);
     51    }
     52 
     53    /* Tell the driver about the change.  Could define a new target for
     54     * this?
     55     */
     56    if (ctx->VertexProgram._Current != prev && ctx->Driver.BindProgram) {
     57       ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
     58                             (struct gl_program *) ctx->VertexProgram._Current);
     59    }
     60 }
     61