Add a less-than operator to Version

[libs/gl.git] / source / extension.cpp

diff --git a/source/extension.cpp b/source/extension.cpp
index e233ee0012eb60563366d7061acf682ae92f96b9..fda183d22f374ea309851019fbcc4f271d8d430a 100644 (file)
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -75,10 +75,22 @@ bool is_supported(const string &ext)
 
        if(!init_done)
        {
-               if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
+               if(get_gl_api()==OPENGL && get_gl_version()>=Version(3, 0))
                {
-                       vector<string> exts = split(gl_ext);
-                       extensions.insert(exts.begin(), exts.end());
+                       typedef GLubyte *(APIENTRY *FPtr_glGetStringi)(GLenum, GLuint);
+                       FPtr_glGetStringi glGetStringi = reinterpret_cast<FPtr_glGetStringi>(get_proc_address("glGetStringi"));
+                       int n_extensions;
+                       glGetIntegerv(GL_NUM_EXTENSIONS, &n_extensions);
+                       for(int i=0; i<n_extensions; ++i)
+                               extensions.insert(reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i)));
+               }
+               else
+               {
+                       if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
+                       {
+                               vector<string> exts = split(gl_ext);
+                               extensions.insert(exts.begin(), exts.end());
+                       }
                }
 
                if(const char *renderer_ptr = reinterpret_cast<const char *>(glGetString(GL_RENDERER)))
@@ -93,7 +105,7 @@ bool is_supported(const string &ext)
 
                                /* AMD's uniform buffer objects only work with the core version of
                                shaders. */
-                               if(!(get_gl_version()>=Version(2, 0)))
+                               if(get_gl_version()<Version(2, 0))
                                        extensions.erase("GL_ARB_uniform_buffer_object");
                        }
                }
@@ -120,6 +132,25 @@ GLApi get_gl_api()
 #endif
 }
 
+inline GLProfile _get_gl_profile()
+{
+       if(get_gl_api()==OPENGL && get_gl_version()>=Version(3, 0))
+       {
+               int mask;
+               glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
+               if(mask==GL_CONTEXT_CORE_PROFILE_BIT)
+                       return CORE_PROFILE;
+       }
+
+       return COMPATIBILITY_PROFILE;
+}
+
+GLProfile get_gl_profile()
+{
+       static GLProfile profile = _get_gl_profile();
+       return profile;
+}
+
 inline Version _get_gl_version()
 {
        const char *gl_ver_ptr = reinterpret_cast<const char *>(glGetString(GL_VERSION));