Add a tool to convert a mesh into C code

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

diff --git a/source/extension.cpp b/source/extension.cpp
index 1a603defe0d24bbf6249b576bda1a86eceab0f48..cd8c6297759d57494d8f372276e8a467a6d12d85 100644 (file)
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -1,20 +1,27 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007, 2009-2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
 #include <set>
-#include <GL/gl.h>
 #ifndef WIN32
+#define GLX_GLXEXT_PROTOTYPES
 #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_program.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;
 
@@ -40,6 +47,12 @@ bool is_supported(const string &ext)
                        init_arb_shader_objects();
                if(extensions.count("GL_ARB_vertex_shader"))
                        init_arb_vertex_shader();
+               if(extensions.count("GL_ARB_vertex_program"))
+                       init_arb_vertex_program();
+               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;
        }
@@ -47,16 +60,49 @@ 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();
+
+               init_done = true;
+       }
+
+       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 glXGetProcAddress(reinterpret_cast<const GLubyte *>(name.c_str()));
+       return glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(name.c_str()));
+#else
+       return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));
 #endif
 }