1 /**************************************************************************
3 * Copyright 2011 Jose Fonseca
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
37 checkExtension(const char *extName, const char *extString)
42 const char *p = extString;
43 const char *q = extName;
47 if (c == '\0' || c == ' ') {
48 if (q && *q == '\0') {
66 Context::hasExtension(const char *string) {
67 if (extensions.empty()) {
68 if (profile == PROFILE_CORE) {
70 GLint num_extensions = 0;
71 glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
72 for (int i = 0; i < num_extensions; ++i) {
73 const char *extension = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
75 extensions.insert(extension);
80 const char *begin = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
82 const char *end = begin;
84 while (c != '\0' && c != ' ') {
89 extensions.insert(std::string(begin, end));
100 return extensions.find(string) != extensions.end();
104 } /* namespace glws */