Windows compatibility:

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

diff --git a/source/extension.cpp b/source/extension.cpp
index e250bb249c9f04fd9fce24ebd3a42762ded9657d..a5ad3191b88e518bae3116039a200a784bc0d6a8 100644 (file)
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -6,16 +6,20 @@ Distributed under the LGPL
 */
 
 #include <set>
-#include <GL/gl.h>
 #ifndef WIN32
 #include <GL/glx.h>
 #endif
+#include <msp/strings/formatter.h>
 #include <msp/strings/utils.h>
 #include "arb_shader_objects.h"
+#include "arb_vertex_buffer_object.h"
 #include "arb_vertex_shader.h"
 #include "ext_framebuffer_object.h"
 #include "except.h"
 #include "extension.h"
+#include "gl.h"
+#include "version_1_2.h"
+#include "version_1_3.h"
 
 using namespace std;
 
@@ -43,6 +47,8 @@ bool is_supported(const string &ext)
                        init_arb_vertex_shader();
                if(extensions.count("GL_EXT_framebuffer_object"))
                        init_ext_framebuffer_object();
+               if(extensions.count("GL_ARB_vertex_buffer_object"))
+                       init_arb_vertex_buffer_object();
 
                init_done=true;
        }
@@ -50,16 +56,47 @@ bool is_supported(const string &ext)
        return extensions.count(ext);
 }
 
+const Version &get_gl_version()
+{
+       static Version version;
+       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]);
+
+               unsigned combined=version.major*0x100+version.minor;
+               if(combined>=0x102)
+                       init_version_1_2();
+               if(combined>=0x103)
+                       init_version_1_3();
+       }
+
+       return version;
+}
+
 void require_extension(const string &ext)
 {
        if(!is_supported(ext))
-               throw UnsupportedExtension(ext+" is not supported");
+               throw UnsupportedExtension(ext);
+}
+
+void require_version(unsigned a, unsigned b)
+{
+       const Version &ver=get_gl_version();
+       if(ver.major<a || (ver.major==a && ver.minor<b))
+               throw UnsupportedExtension(format("OpenGL %d.%d", a, b));
 }
 
 ExtFunc *get_proc_address(const string &name)
 {
 #ifndef WIN32
        return glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(name.c_str()));
+#else
+       return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));
 #endif
 }