/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2014 Blender Foundation.
 * All rights reserved.
 */

/** \file
 * \ingroup intern_glew-mx
 */

#include "glew-mx.h"

#include <stdio.h>
#include <stdlib.h>

#define CASE_CODE_RETURN_STR(code) \
  case code: \
    return #code;

static const char *get_glew_error_enum_string(GLenum error)
{
  switch (error) {
    CASE_CODE_RETURN_STR(GLEW_OK) /* also GLEW_NO_ERROR */
    CASE_CODE_RETURN_STR(GLEW_ERROR_NO_GL_VERSION)
    CASE_CODE_RETURN_STR(GLEW_ERROR_GL_VERSION_10_ONLY)
    CASE_CODE_RETURN_STR(GLEW_ERROR_GLX_VERSION_11_ONLY)
#ifdef WITH_GLEW_ES
    CASE_CODE_RETURN_STR(GLEW_ERROR_NOT_GLES_VERSION)
    CASE_CODE_RETURN_STR(GLEW_ERROR_GLES_VERSION)
    CASE_CODE_RETURN_STR(GLEW_ERROR_NO_EGL_VERSION)
    CASE_CODE_RETURN_STR(GLEW_ERROR_EGL_VERSION_10_ONLY)
#endif
    default:
      return NULL;
  }
}

GLenum glew_chk(GLenum error, const char *file, int line, const char *text)
{
  if (error != GLEW_OK) {
    const char *code = get_glew_error_enum_string(error);
    const char *msg = (const char *)glewGetErrorString(error);

    if (error == GLEW_ERROR_NO_GL_VERSION)
      return GLEW_OK;

#ifndef NDEBUG
    fprintf(stderr,
            "%s(%d):[%s] -> GLEW Error (0x%04X): %s: %s\n",
            file,
            line,
            text,
            error,
            code ? code : "<no symbol>",
            msg ? msg : "<no message>");
#else
    (void)file;
    (void)line;
    (void)text;
    fprintf(stderr,
            "GLEW Error (0x%04X): %s: %s\n",
            error,
            code ? code : "<no symbol>",
            msg ? msg : "<no message>");
#endif
  }

  return error;
}