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/*

 * Mesa 3-D graphics library

 *

 * Copyright (C) 1999-2008  Brian Paul   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.

 */

/**

 * \mainpage Mesa GL API Module

 *

 * \section GLAPIIntroduction Introduction

 *

 * The Mesa GL API module is responsible for dispatching all the

 * gl*() functions.  All GL functions are dispatched by jumping through

 * the current dispatch table (basically a struct full of function

 * pointers.)

 *

 * A per-thread current dispatch table and per-thread current context

 * pointer are managed by this module too.

 *

 * This module is intended to be non-Mesa-specific so it can be used

 * with the X/DRI libGL also.

 */

#ifndef _GLAPI_H

#define _GLAPI_H

#include "util/macros.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifdef _GLAPI_NO_EXPORTS

#  define _GLAPI_EXPORT

#else /* _GLAPI_NO_EXPORTS */

#  ifdef _WIN32

#    ifdef _GLAPI_DLL_EXPORTS

#      define _GLAPI_EXPORT __declspec(dllexport)

#    else

#      define _GLAPI_EXPORT __declspec(dllimport)

#    endif

#  elif defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))

#    define _GLAPI_EXPORT __attribute__((visibility("default")))

#  else

#    define _GLAPI_EXPORT

#  endif

#endif /* _GLAPI_NO_EXPORTS */

/* Is this needed?  It is incomplete anyway. */

#ifdef USE_MGL_NAMESPACE

#define _glapi_set_dispatch _mglapi_set_dispatch

#define _glapi_get_dispatch _mglapi_get_dispatch

#define _glapi_set_context _mglapi_set_context

#define _glapi_get_context _mglapi_get_context

#define _glapi_Dispatch _mglapi_Dispatch

#define _glapi_Context _mglapi_Context

#endif

typedef void (*_glapi_proc)(void);

typedef void (*_glapi_nop_handler_proc)(const char *name);

struct _glapi_table;

#if defined (GLX_USE_TLS)

_GLAPI_EXPORT extern __thread struct _glapi_table * _glapi_tls_Dispatch

    __attribute__((tls_model("initial-exec")));

_GLAPI_EXPORT extern __thread void * _glapi_tls_Context

    __attribute__((tls_model("initial-exec")));

_GLAPI_EXPORT extern const struct _glapi_table *_glapi_Dispatch;

_GLAPI_EXPORT extern const void *_glapi_Context;

# define GET_DISPATCH() _glapi_tls_Dispatch

# define GET_CURRENT_CONTEXT(C)  struct gl_context *C = (struct gl_context *) _glapi_tls_Context

#else

_GLAPI_EXPORT extern struct _glapi_table *_glapi_Dispatch;

_GLAPI_EXPORT extern void *_glapi_Context;

#define GET_DISPATCH() \

     (likely(_glapi_Dispatch) ? _glapi_Dispatch : _glapi_get_dispatch())

#define GET_CURRENT_CONTEXT(C)  struct gl_context *C = (struct gl_context *) \

     (likely(_glapi_Context) ? _glapi_Context : _glapi_get_context())

#endif /* defined (GLX_USE_TLS) */

void

_glapi_destroy_multithread(void);

_GLAPI_EXPORT void

_glapi_check_multithread(void);

_GLAPI_EXPORT void

_glapi_set_context(void *context);

_GLAPI_EXPORT void *

_glapi_get_context(void);

_GLAPI_EXPORT void

_glapi_set_dispatch(struct _glapi_table *dispatch);

_GLAPI_EXPORT struct _glapi_table *

_glapi_get_dispatch(void);

_GLAPI_EXPORT unsigned int

_glapi_get_dispatch_table_size(void);

_GLAPI_EXPORT int

_glapi_add_dispatch( const char * const * function_names,

		     const char * parameter_signature );

_GLAPI_EXPORT int

_glapi_get_proc_offset(const char *funcName);

_GLAPI_EXPORT _glapi_proc

_glapi_get_proc_address(const char *funcName);

_GLAPI_EXPORT const char *

_glapi_get_proc_name(unsigned int offset);

_GLAPI_EXPORT struct _glapi_table *

_glapi_create_table_from_handle(void *handle, const char *symbol_prefix);

_GLAPI_EXPORT void

_glapi_set_nop_handler(_glapi_nop_handler_proc func);

/** Return pointer to new dispatch table filled with no-op functions */

_GLAPI_EXPORT struct _glapi_table *

_glapi_new_nop_table(unsigned num_entries);

/** Deprecated function */

_GLAPI_EXPORT unsigned long

_glthread_GetID(void);

/*

 * These stubs are kept so that the old DRI drivers still load.

 */

_GLAPI_EXPORT void

_glapi_noop_enable_warnings(unsigned char enable);

_GLAPI_EXPORT void

_glapi_set_warning_func(_glapi_proc func);

#ifdef __cplusplus

}

#endif

#endif /* _GLAPI_H */