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glew/auto/src/glew_init_glext.c

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Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
/* query opengl extensions string(s) */
if(GLEW_VERSION_3_0)
{
GLuint len;
struct initflag *ptr;
glGetIntegerv(GL_NUM_EXTENSIONS, &numExts);
for (ext = 0; ext < numExts; ext++)
{
extStart = glGetStringi(GL_EXTENSIONS, ext);
len = _glewStrLen(extStart);
ptr = in_word_set(extStart, len);
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
if (ptr != NULL && ptr->flag != NULL) {
#ifdef GLEW_MX
*(GLboolean *)((char *)ctx + (size_t)(ptr->flag)) = GL_TRUE;
#else
*ptr->flag = GL_TRUE;
#endif
}
extStart += len + 1;
}
}
else
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
{
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
extStart = glGetString(GL_EXTENSIONS);
if (extStart == 0)
extStart = (const GLubyte*)"";
extEnd = extStart + _glewStrLen(extStart);
while (extStart < extEnd)
{
GLuint len = _glewStrCLen(extStart, ' ');
struct initflag *ptr = in_word_set(extStart, len);
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
if (ptr != NULL && ptr->flag != NULL) {
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
#ifdef GLEW_MX
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
*(GLboolean *)((char *)ctx + (size_t)(ptr->flag)) = GL_TRUE;
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
#else
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
*ptr->flag = GL_TRUE;
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
#endif
Get GL extension strings via glGetStringi() if GL version is >= 3.0.
2015-02-04 14:44:01 +00:00
}
extStart += len + 1;
Load core function pointers before checking the extension string. For GL versions since 3.0 the glGetString() function is deprecated or removed, and the right way to query extensions is glGetStringi(), but that has to be loaded first. Also instead of searching the whole extension string n times lookup the known extensions in a static hash table. The hash table is built with the gperf utility.
2015-02-04 14:27:59 +00:00
}
}
/* initialize extensions */
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