summaryrefslogtreecommitdiff
path: root/src/mapi/glapi/glapi_nop.c
blob: 9709551ee78bfeefebe089c4fe55898765c409cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
 * Mesa 3-D graphics library
 * Version:  7.8
 *
 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
 * Copyright (C) 2010  VMware, Inc.  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
 * THE AUTHORS 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.
 */


/**
 * No-op dispatch table.
 *
 * This file defines a special dispatch table which is loaded with no-op
 * functions.
 *
 * When there's no current rendering context, calling a GL function like
 * glBegin() is a no-op.  Apps should never normally do this.  So as a
 * debugging aid, each of the no-op functions will emit a warning to
 * stderr if the MESA_DEBUG or LIBGL_DEBUG env var is set.
 */



#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#include "glapi/mesa.h"
#else
#include "main/compiler.h"
#include "main/glheader.h"
#endif

#include "glapi/glapi.h"


/*
 * These stubs are kept so that the old DRI drivers still load.
 */
PUBLIC void
_glapi_noop_enable_warnings(GLboolean enable);

PUBLIC void
_glapi_set_warning_func(_glapi_proc func);

void
_glapi_noop_enable_warnings(GLboolean enable)
{
}

void
_glapi_set_warning_func(_glapi_proc func)
{
}

#ifdef DEBUG

/**
 * Called by each of the no-op GL entrypoints.
 */
static int
Warn(const char *func)
{
#if !defined(_WIN32_WCE)
   if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
      fprintf(stderr, "GL User Error: gl%s called without a rendering context\n",
              func);
   }
#endif
   return 0;
}


/**
 * This is called if the user somehow calls an unassigned GL dispatch function.
 */
static GLint
NoOpUnused(void)
{
   return Warn(" function");
}

/*
 * Defines for the glapitemp.h functions.
 */
#define KEYWORD1 static
#define KEYWORD1_ALT static
#define KEYWORD2 GLAPIENTRY
#define NAME(func)  NoOp##func
#define DISPATCH(func, args, msg)  Warn(#func);
#define RETURN_DISPATCH(func, args, msg)  Warn(#func); return 0


/*
 * Defines for the table of no-op entry points.
 */
#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name

#else

static int
NoOpGeneric(void)
{
#if !defined(_WIN32_WCE)
   if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
      fprintf(stderr, "GL User Error: calling GL function without a rendering context\n");
   }
#endif
   return 0;
}

#define TABLE_ENTRY(name) (_glapi_proc) NoOpGeneric

#endif

#define DISPATCH_TABLE_NAME __glapi_noop_table
#define UNUSED_TABLE_NAME __unused_noop_functions

#include "glapi/glapitemp.h"