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/*
* Mesa 3-D graphics library
*
* 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 OR COPYRIGHT HOLDERS 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.
*/
#include "glapi/glapi_priv.h"
#undef _GLAPI_EXPORT
#define _GLAPI_EXPORT
void _GLAPI_EXPORT
_glapi_noop_enable_warnings(unsigned char enable)
{
}
void _GLAPI_EXPORT
_glapi_set_warning_func(_glapi_proc func)
{
}
/*
* When GLAPIENTRY is __stdcall (i.e. Windows), the stack is popped by the
* callee making the number/type of arguments significant.
*/
#if defined(_WIN32) || defined(DEBUG)
/**
* Called by each of the no-op GL entrypoints.
*/
static int
Warn(const char *func)
{
#if defined(DEBUG)
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 (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG")) {
fprintf(stderr, "GL User Error: calling GL function without a rendering context\n");
}
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/gen/glapitemp.h"
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