GLEW: Update to pristine upstream 2.1.0
Previous version was a modified GLEW 1.11.0 (2014). The STK modifications meant
to address https://sourceforge.net/p/glew/patches/40/ which is now fixed since
GLEW 2.0.0.
Here's the diff between pristine 1.11.0 and STK's version before this patch:
```diff
diff --git a/lib/glew/src/glew.c b/lib/glew/src/glew.c
index a78f14e1e..f8df0d758 100644
--- a/lib/glew/src/glew.c
+++ b/lib/glew/src/glew.c
@@ -296,30 +296,6 @@ static GLboolean _glewStrSame3 (GLubyte** a, GLuint* na, const GLubyte* b, GLuin
return GL_FALSE;
}
-#include <string.h>
-#include <stdlib.h>
-
-/* A simple open addressing hashset for extensions on OpenGL 3+. */
-static const char ** ext_hashset = NULL;
-size_t ext_hashset_size = 0;
-
-static unsigned hash_string(const char * key)
-{
- unsigned hash = 0;
- unsigned i = 0;
- for (; i < strlen(key); ++i)
- {
- hash += key[i];
- hash += (hash << 10);
- hash ^= (hash >> 6);
- }
- hash += (hash << 3);
- hash ^= (hash >> 11);
- hash += (hash << 15);
-
- return hash;
-}
-
/*
* Search for name in the extensions string. Use of strstr()
* is not sufficient because extension names can be prefixes of
@@ -328,37 +304,14 @@ static unsigned hash_string(const char * key)
*/
static GLboolean _glewSearchExtension (const char* name, const GLubyte *start, const GLubyte *end)
{
- if (ext_hashset != NULL)
+ const GLubyte* p;
+ GLuint len = _glewStrLen((const GLubyte*)name);
+ p = start;
+ while (p < end)
{
- unsigned hash = hash_string(name);
-
- /*
- * As the hashset is bigger than the number of extensions
- * this will eventually break.
- */
- while(1)
- {
- unsigned index = hash % ext_hashset_size;
- if (ext_hashset[index] == NULL)
- break;
-
- if (!strcmp(ext_hashset[index], name))
- return GL_TRUE;
-
- hash++;
- }
- }
- else
- {
- const GLubyte* p;
- GLuint len = _glewStrLen((const GLubyte*)name);
- p = start;
- while (p < end)
- {
- GLuint n = _glewStrCLen(p, ' ');
- if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
- p += n+1;
- }
+ GLuint n = _glewStrCLen(p, ' ');
+ if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
+ p += n+1;
}
return GL_FALSE;
}
@@ -10099,13 +10052,9 @@ static GLboolean _glewInit_GL_WIN_swap_hint (GLEW_CONTEXT_ARG_DEF_INIT)
/* ------------------------------------------------------------------------- */
GLboolean GLEWAPIENTRY glewGetExtension (const char* name)
-{
+{
const GLubyte* start;
const GLubyte* end;
-
- if (ext_hashset != NULL)
- return _glewSearchExtension(name, NULL, NULL);
-
start = (const GLubyte*)glGetString(GL_EXTENSIONS);
if (start == 0)
return GL_FALSE;
@@ -10165,39 +10114,9 @@ GLenum GLEWAPIENTRY glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
GLEW_VERSION_1_2 = GLEW_VERSION_1_2_1 == GL_TRUE || ( major == 1 && minor >= 2 ) ? GL_TRUE : GL_FALSE;
GLEW_VERSION_1_1 = GLEW_VERSION_1_2 == GL_TRUE || ( major == 1 && minor >= 1 ) ? GL_TRUE : GL_FALSE;
}
-
- if (major >= 3) /* glGetString method is deprecated */
- {
- GLint n, i;
- glGetIntegerv(GL_NUM_EXTENSIONS, &n);
- glGetStringi = (PFNGLGETSTRINGIPROC)glewGetProcAddress((const GLubyte*)"glGetStringi");
-
- free(ext_hashset); /* In case we get called a second time. */
-
- ext_hashset_size = (n * 3) / 2;
- ext_hashset = calloc(ext_hashset_size, sizeof(const char *));
- for (i = 0; i < n; ++i)
- {
- const char * extension;
- unsigned hash;
-
- extension = (const char *)glGetStringi(GL_EXTENSIONS, i);
- hash = hash_string(extension);
-
- while(ext_hashset[hash % ext_hashset_size] != NULL)
- hash++;
-
- ext_hashset[hash % ext_hashset_size] = extension;
- }
-
- extStart = 0;
- }
- else
- {
- /* query opengl extensions string */
- extStart = glGetString(GL_EXTENSIONS);
- }
+ /* query opengl extensions string */
+ extStart = glGetString(GL_EXTENSIONS);
if (extStart == 0)
extStart = (const GLubyte*)"";
extEnd = extStart + _glewStrLen(extStart);
@@ -14064,9 +13983,6 @@ GLenum glxewContextInit (GLXEW_CONTEXT_ARG_DEF_LIST)
GLXEW_VERSION_1_2 = GL_TRUE;
GLXEW_VERSION_1_3 = GL_TRUE;
GLXEW_VERSION_1_4 = GL_TRUE;
- /* Check if GLX display is available */
- if (glXGetCurrentDisplay == NULL || glXGetCurrentDisplay() == NULL)
- return GLEW_OK;
/* query GLX version */
glXQueryVersion(glXGetCurrentDisplay(), &major, &minor);
if (major == 1 && minor <= 3)
```
2a093cde0a