X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fextension.cpp;h=bab160d5196fe71519f8fbeca3e2680f9bbc1032;hb=4d3bee9264c4e60fb811019fc1699e17a338d13d;hp=6b00ceb6cf8174edbc4ddee06d0df82071ab3d89;hpb=ceae2a27dfc58310c5bab7e3aa3fedf0fa9a1f49;p=libs%2Fgl.git

diff --git a/source/extension.cpp b/source/extension.cpp
index 6b00ceb6..bab160d5 100644
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -31,13 +31,13 @@ namespace GL {
 bool is_supported(const string &ext)
 {
 	static set<string> extensions;
-	static bool init_done=false;
+	static bool init_done = false;
 
 	if(!init_done)
 	{
-		if(const char *gl_ext=reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
+		if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
 		{
-			vector<string> exts=split(gl_ext);
+			vector<string> exts = split(gl_ext);
 			extensions.insert(exts.begin(), exts.end());
 		}
 
@@ -54,25 +54,31 @@ bool is_supported(const string &ext)
 		if(extensions.count("GL_ARB_vertex_buffer_object"))
 			init_arb_vertex_buffer_object();
 
-		init_done=true;
+		init_done = true;
 	}
 
 	return extensions.count(ext);
 }
 
+void require_extension(const string &ext)
+{
+	if(!is_supported(ext))
+		throw UnsupportedExtension(ext);
+}
+
 const Version &get_gl_version()
 {
 	static Version version;
-	static bool init_done=false;
+	static bool init_done = false;
 
 	if(!init_done)
 	{
-		string gl_ver=reinterpret_cast<const char *>(glGetString(GL_VERSION));
-		vector<string> parts=split(gl_ver.substr(0, gl_ver.find(' ')), '.');
-		version.major=lexical_cast<unsigned>(parts[0]);
-		version.minor=lexical_cast<unsigned>(parts[1]);
+		string gl_ver = reinterpret_cast<const char *>(glGetString(GL_VERSION));
+		vector<string> parts = split(gl_ver.substr(0, gl_ver.find(' ')), '.');
+		version.major = lexical_cast<unsigned>(parts[0]);
+		version.minor = lexical_cast<unsigned>(parts[1]);
 
-		unsigned combined=version.major*0x100+version.minor;
+		unsigned combined = version.major*0x100+version.minor;
 		if(combined>=0x102)
 			init_version_1_2();
 		if(combined>=0x103)
@@ -84,16 +90,15 @@ const Version &get_gl_version()
 	return version;
 }
 
-void require_extension(const string &ext)
+bool is_version_at_least(unsigned a, unsigned b)
 {
-	if(!is_supported(ext))
-		throw UnsupportedExtension(ext);
+	const Version &ver = get_gl_version();
+	return (ver.major>a || (ver.major==a && ver.minor>=b));
 }
 
 void require_version(unsigned a, unsigned b)
 {
-	const Version &ver=get_gl_version();
-	if(ver.major<a || (ver.major==a && ver.minor<b))
+	if(!is_version_at_least(a, b))
 		throw UnsupportedExtension(format("OpenGL %d.%d", a, b));
 }