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  1. /*
  2.  * Mesa 3-D graphics library
  3.  * Version:  7.8
  4.  *
  5.  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
  6.  * Copyright (C) 2010  VMware, Inc.  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.  * THE AUTHORS 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.  
  26.  
  27. /**
  28.  * No-op dispatch table.
  29.  *
  30.  * This file defines a special dispatch table which is loaded with no-op
  31.  * functions.
  32.  *
  33.  * When there's no current rendering context, calling a GL function like
  34.  * glBegin() is a no-op.  Apps should never normally do this.  So as a
  35.  * debugging aid, each of the no-op functions will emit a warning to
  36.  * stderr if the MESA_DEBUG or LIBGL_DEBUG env var is set.
  37.  */
  38.  
  39.  
  40.  
  41. #include "glapi/glapi_priv.h"
  42.  
  43.  
  44. void
  45. _glapi_noop_enable_warnings(unsigned char enable)
  46. {
  47. }
  48.  
  49. void
  50. _glapi_set_warning_func(_glapi_proc func)
  51. {
  52. }
  53.  
  54. #ifdef DEBUG
  55.  
  56. /**
  57.  * Called by each of the no-op GL entrypoints.
  58.  */
  59. static int
  60. Warn(const char *func)
  61. {
  62. #if !defined(_WIN32_WCE)
  63.    if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
  64.       fprintf(stderr, "GL User Error: gl%s called without a rendering context\n",
  65.               func);
  66.    }
  67. #endif
  68.    return 0;
  69. }
  70.  
  71.  
  72. /**
  73.  * This is called if the user somehow calls an unassigned GL dispatch function.
  74.  */
  75. static GLint
  76. NoOpUnused(void)
  77. {
  78.    return Warn(" function");
  79. }
  80.  
  81. /*
  82.  * Defines for the glapitemp.h functions.
  83.  */
  84. #define KEYWORD1 static
  85. #define KEYWORD1_ALT static
  86. #define KEYWORD2 GLAPIENTRY
  87. #define NAME(func)  NoOp##func
  88. #define DISPATCH(func, args, msg)  Warn(#func);
  89. #define RETURN_DISPATCH(func, args, msg)  Warn(#func); return 0
  90.  
  91.  
  92. /*
  93.  * Defines for the table of no-op entry points.
  94.  */
  95. #define TABLE_ENTRY(name) (_glapi_proc) NoOp##name
  96.  
  97. #else
  98.  
  99. static int
  100. NoOpGeneric(void)
  101. {
  102. #if !defined(_WIN32_WCE)
  103.    if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
  104.       fprintf(stderr, "GL User Error: calling GL function without a rendering context\n");
  105.    }
  106. #endif
  107.    return 0;
  108. }
  109.  
  110. #define TABLE_ENTRY(name) (_glapi_proc) NoOpGeneric
  111.  
  112. #endif
  113.  
  114. #define DISPATCH_TABLE_NAME __glapi_noop_table
  115. #define UNUSED_TABLE_NAME __unused_noop_functions
  116.  
  117. #include "glapi/glapitemp.h"
  118.