+++ /dev/null
-#include <set>
-#ifndef WIN32
-#define GLX_GLXEXT_PROTOTYPES
-#include <GL/glx.h>
-#endif
-#include <msp/strings/format.h>
-#include <msp/strings/utils.h>
-#include "error.h"
-#include "extension.h"
-#include "gl.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-Extension::Extension(const char *n, InitFunc f):
- name(n),
- init_func(f),
- init_done(false),
- support(UNSUPPORTED)
-{ }
-
-Extension::operator bool() const
-{
- if(!init_done)
- {
- support = init_func();
- init_done = true;
- }
-
- return support>UNSUPPORTED;
-}
-
-
-Require::Require(const Extension &ext)
-{
- if(!ext)
- throw unsupported_extension(ext.get_name());
-}
-
-
-bool is_supported(const string &ext)
-{
- static set<string> extensions;
- static bool init_done = false;
-
- if(!init_done)
- {
- if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
- {
- vector<string> exts = split(gl_ext);
- extensions.insert(exts.begin(), exts.end());
- }
-
- init_done = true;
- }
-
- 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]);
-
- init_done = true;
- }
-
- return version;
-}
-
-bool is_version_at_least(unsigned a, unsigned b)
-{
- const Version &ver = get_gl_version();
- return (ver.major>a || (ver.major==a && ver.minor>=b));
-}
-
-ExtFunc *get_proc_address(const string &name)
-{
-#ifndef WIN32
- return glXGetProcAddressARB(reinterpret_cast<const unsigned char *>(name.c_str()));
-#else
- return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));
-#endif
-}
-
-} // namespace GL
-} // namespace Msp