#include <set>
-#ifndef WIN32
+#include <cstdlib>
+#if defined(__ANDROID__)
+#include <EGL/egl.h>
+#elif !defined(_WIN32) && !defined(__APPLE__)
#define GLX_GLXEXT_PROTOTYPES
#include <GL/glx.h>
#endif
namespace Msp {
namespace GL {
+Version::Version()
+{
+ major = 0;
+ minor = 0;
+}
+
+Version::Version(unsigned short a, unsigned short i)
+{
+ major = a;
+ minor = i;
+}
+
+Version::Version(const string &s)
+{
+ vector<string> parts = split(s, '.');
+ major = lexical_cast<unsigned>(parts[0]);
+ minor = lexical_cast<unsigned>(parts[1]);
+}
+
+bool Version::operator>=(const Version &other) const
+{
+ return major>other.major || (major==other.major && minor>=other.minor);
+}
+
+
Extension::Extension(const char *n, InitFunc f):
name(n),
init_func(f),
extensions.insert(exts.begin(), exts.end());
}
+ if(const char *renderer_ptr = reinterpret_cast<const char *>(glGetString(GL_RENDERER)))
+ {
+ string renderer = renderer_ptr;
+ if(renderer.find("Radeon")!=string::npos || renderer.find("AMD")!=string::npos)
+ {
+ /* Radeon doesn't process NV_primitive_restart correctly and treats
+ the restart index as a normal element if the indices are stored in a
+ buffer. */
+ extensions.erase("GL_NV_primitive_restart");
+
+ /* AMD's uniform buffer objects only work with the core version of
+ shaders. */
+ if(!(get_gl_version()>=Version(2, 0)))
+ extensions.erase("GL_ARB_uniform_buffer_object");
+ }
+ }
+
+ if(const char *disable_ptr = getenv("MSPGL_DISABLE_EXTENSIONS"))
+ {
+ vector<string> disable = split(disable_ptr);
+ for(vector<string>::const_iterator i=disable.begin(); i!=disable.end(); ++i)
+ extensions.erase(*i);
+ }
+
init_done = true;
}
return extensions.count(ext);
}
-const Version &get_gl_version()
+GLApi get_gl_api()
{
- static Version version;
- static bool init_done = false;
+#ifdef GL_ES_VERSION_2_0
+ return OPENGL_ES2;
+#else
+ return OPENGL;
+#endif
+}
- if(!init_done)
+inline Version _get_gl_version()
+{
+ const char *gl_ver_ptr = reinterpret_cast<const char *>(glGetString(GL_VERSION));
+ if(!gl_ver_ptr)
+ throw runtime_error("OpenGL version not available");
+
+ string gl_ver = gl_ver_ptr;
+ if(!gl_ver.compare(0, 10, "OpenGL ES "))
+ gl_ver.erase(0, 10);
+
+ Version ver(gl_ver.substr(0, gl_ver.find(' ')));
+
+ if(const char *force_ver_ptr = getenv("MSPGL_FORCE_VERSION"))
{
- 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]);
+ Version force_ver(force_ver_ptr);
+ if(!(force_ver>=ver))
+ ver = force_ver;
+ }
- init_done = true;
+ return ver;
+}
+
+const Version &get_gl_version()
+{
+ static Version version = _get_gl_version();
+ return version;
+}
+
+inline Version _get_glsl_version()
+{
+ const char *glsl_ver_ptr = reinterpret_cast<const char *>(glGetString(GL_SHADING_LANGUAGE_VERSION));
+ if(!glsl_ver_ptr)
+ throw runtime_error("GLSL version not available");
+
+ string glsl_ver = glsl_ver_ptr;
+ if(!glsl_ver.compare(0, 18, "OpenGL ES GLSL ES "))
+ glsl_ver.erase(0, 18);
+
+ Version ver(glsl_ver.substr(0, glsl_ver.find(' ')));
+
+ if(const char *force_ver_ptr = getenv("MSPGL_FORCE_GLSL_VERSION"))
+ {
+ Version force_ver(force_ver_ptr);
+ if(!(force_ver>=ver))
+ ver = force_ver;
}
+ return ver;
+}
+
+const Version &get_glsl_version()
+{
+ static Version version = _get_glsl_version();
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));
+ return get_gl_version()>=Version(a, b);
}
ExtFunc *get_proc_address(const string &name)
{
-#ifndef WIN32
- return glXGetProcAddressARB(reinterpret_cast<const unsigned char *>(name.c_str()));
-#else
+#if defined(WIN32)
return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));
+#elif defined(__APPLE__)
+ (void)name;
+ return 0; // Not supported
+#elif defined(__ANDROID__)
+ return eglGetProcAddress(name.c_str());
+#else
+ return glXGetProcAddressARB(reinterpret_cast<const unsigned char *>(name.c_str()));
#endif
}