glew-1.13.0HEADglew-1.13.0master

1 files changed, 45 insertions, 0 deletions

diff --git a/auto/src/glew_init_wgl.c b/auto/src/glew_init_wgl.c
new file mode 100644
index 0000000..cc731fe
--- /dev/null
+++ b/auto/src/glew_init_wgl.c
@@ -0,0 +1,45 @@
+/* ------------------------------------------------------------------------- */
+
+static PFNWGLGETEXTENSIONSSTRINGARBPROC _wglewGetExtensionsStringARB = NULL;
+static PFNWGLGETEXTENSIONSSTRINGEXTPROC _wglewGetExtensionsStringEXT = NULL;
+
+GLboolean GLEWAPIENTRY wglewGetExtension (const char* name)
+{    
+  const GLubyte* start;
+  const GLubyte* end;
+  if (_wglewGetExtensionsStringARB == NULL)
+    if (_wglewGetExtensionsStringEXT == NULL)
+      return GL_FALSE;
+    else
+      start = (const GLubyte*)_wglewGetExtensionsStringEXT();
+  else
+    start = (const GLubyte*)_wglewGetExtensionsStringARB(wglGetCurrentDC());
+  if (start == 0)
+    return GL_FALSE;
+  end = start + _glewStrLen(start);
+  return _glewSearchExtension(name, start, end);
+}
+
+#ifdef GLEW_MX
+GLenum GLEWAPIENTRY wglewContextInit (WGLEW_CONTEXT_ARG_DEF_LIST)
+#else
+GLenum GLEWAPIENTRY wglewInit (WGLEW_CONTEXT_ARG_DEF_LIST)
+#endif
+{
+  GLboolean crippled;
+  const GLubyte* extStart;
+  const GLubyte* extEnd;
+  /* find wgl extension string query functions */
+  _wglewGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)glewGetProcAddress((const GLubyte*)"wglGetExtensionsStringARB");
+  _wglewGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)glewGetProcAddress((const GLubyte*)"wglGetExtensionsStringEXT");
+  /* query wgl extension string */
+  if (_wglewGetExtensionsStringARB == NULL)
+    if (_wglewGetExtensionsStringEXT == NULL)
+      extStart = (const GLubyte*)"";
+    else
+      extStart = (const GLubyte*)_wglewGetExtensionsStringEXT();
+  else
+    extStart = (const GLubyte*)_wglewGetExtensionsStringARB(wglGetCurrentDC());
+  extEnd = extStart + _glewStrLen(extStart);
+  /* initialize extensions */
+  crippled = _wglewGetExtensionsStringARB == NULL && _wglewGetExtensionsStringEXT == NULL;