src/mesa/tnl/t_vp_build.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2007  Tungsten Graphics   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * TUNGSTEN GRAPHICS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * 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
  25 /**
  26  * \file t_vp_build.c
  27  * Create a vertex program to execute the current fixed function T&L pipeline.
  28  * \author Keith Whitwell
  29  */
  30
  31
  32 #include "main/glheader.h"
  33 #include "main/ffvertex_prog.h"
  34 #include "main/mtypes.h"
  35 #include "t_vp_build.h"
  36
  37
  38 /**
  39  * XXX This should go away someday, but still referenced by some drivers...
  40  */
  41 void _tnl_UpdateFixedFunctionProgram( struct gl_context *ctx )
  42 {
  43    const struct gl_vertex_program *prev = ctx->VertexProgram._Current;
  44
  45    if (!ctx->VertexProgram._Current ||
  46        ctx->VertexProgram._Current == ctx->VertexProgram._TnlProgram) {
  47       ctx->VertexProgram._Current
  48          = ctx->VertexProgram._TnlProgram
  49          = _mesa_get_fixed_func_vertex_program(ctx);
  50    }
  51
  52    /* Tell the driver about the change.  Could define a new target for
  53     * this?
  54     */
  55    if (ctx->VertexProgram._Current != prev && ctx->Driver.BindProgram) {
  56       ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB,
  57                             (struct gl_program *) ctx->VertexProgram._Current);
  58    }
  59 }