3 #define GLX_GLXEXT_PROTOTYPES
6 #include <msp/strings/format.h>
7 #include <msp/strings/utils.h>
8 #include "arb_shader_objects.h"
9 #include "arb_vertex_buffer_object.h"
10 #include "arb_vertex_program.h"
11 #include "arb_vertex_shader.h"
12 #include "ext_framebuffer_blit.h"
13 #include "ext_framebuffer_multisample.h"
14 #include "ext_framebuffer_object.h"
16 #include "extension.h"
18 #include "nv_primitive_restart.h"
19 #include "version_1_2.h"
20 #include "version_1_3.h"
27 bool is_supported(const string &ext)
29 static set<string> extensions;
30 static bool init_done = false;
34 if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
36 vector<string> exts = split(gl_ext);
37 extensions.insert(exts.begin(), exts.end());
40 /* XXX Conceptually a bit weird place for this, but I couldn't really come up
41 with anything better that would still be transparent. */
42 if(extensions.count("GL_ARB_shader_objects"))
43 init_arb_shader_objects();
44 if(extensions.count("GL_ARB_vertex_shader"))
45 init_arb_vertex_shader();
46 if(extensions.count("GL_ARB_vertex_program"))
47 init_arb_vertex_program();
48 if(extensions.count("GL_EXT_framebuffer_object"))
49 init_ext_framebuffer_object();
50 if(extensions.count("GL_EXT_framebuffer_blit"))
51 init_ext_framebuffer_blit();
52 if(extensions.count("GL_EXT_framebuffer_multisample"))
53 init_ext_framebuffer_multisample();
54 if(extensions.count("GL_ARB_vertex_buffer_object"))
55 init_arb_vertex_buffer_object();
56 if(extensions.count("GL_NV_primitive_restart"))
57 init_nv_primitive_restart();
62 return extensions.count(ext);
65 void require_extension(const string &ext)
67 if(!is_supported(ext))
68 throw UnsupportedExtension(ext);
71 const Version &get_gl_version()
73 static Version version;
74 static bool init_done = false;
78 string gl_ver = reinterpret_cast<const char *>(glGetString(GL_VERSION));
79 vector<string> parts = split(gl_ver.substr(0, gl_ver.find(' ')), '.');
80 version.major = lexical_cast<unsigned>(parts[0]);
81 version.minor = lexical_cast<unsigned>(parts[1]);
83 unsigned combined = version.major*0x100+version.minor;
95 bool is_version_at_least(unsigned a, unsigned b)
97 const Version &ver = get_gl_version();
98 return (ver.major>a || (ver.major==a && ver.minor>=b));
101 void require_version(unsigned a, unsigned b)
103 if(!is_version_at_least(a, b))
104 throw UnsupportedExtension(format("OpenGL %d.%d", a, b));
107 ExtFunc *get_proc_address(const string &name)
110 return glXGetProcAddressARB(reinterpret_cast<const unsigned char *>(name.c_str()));
112 return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));