-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#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
-#include <msp/strings/formatter.h>
+#include <msp/strings/format.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 "error.h"
#include "extension.h"
#include "gl.h"
-#include "version_1_2.h"
-#include "version_1_3.h"
+
+#ifndef GL_VERSION_3_0
+#define GL_NUM_EXTENSIONS 0x821D
+#endif
+
+#ifndef GL_VERSION_3_2
+#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
+#define GL_CONTEXT_PROFILE_MASK 0x9126
+#endif
using namespace std;
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),
+ 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)
{
+ if(is_disabled(ext))
+ return false;
+
static set<string> extensions;
- static bool init_done=false;
+ static bool init_done = false;
if(!init_done)
{
- if(const char *gl_ext=reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
+ if(get_gl_api()==OPENGL && get_gl_version()>=Version(3, 0))
+ {
+ typedef GLubyte *(APIENTRY *FPtr_glGetStringi)(GLenum, GLuint);
+ FPtr_glGetStringi glGetStringi = reinterpret_cast<FPtr_glGetStringi>(get_proc_address("glGetStringi"));
+ int n_extensions;
+ glGetIntegerv(GL_NUM_EXTENSIONS, &n_extensions);
+ for(int i=0; i<n_extensions; ++i)
+ extensions.insert(reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i)));
+ }
+ else
{
- vector<string> exts=split(gl_ext);
- extensions.insert(exts.begin(), exts.end());
+ if(const char *gl_ext = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)))
+ {
+ vector<string> exts = split(gl_ext);
+ extensions.insert(exts.begin(), exts.end());
+ }
}
- /* XXX Conceptually a bit weird place for this, but I couldn't really come up
- with anything better that would still be transparent. */
- if(extensions.count("GL_ARB_shader_objects"))
- init_arb_shader_objects();
- if(extensions.count("GL_ARB_vertex_shader"))
- 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;
+ init_done = true;
}
return extensions.count(ext);
}
-const Version &get_gl_version()
+bool is_supported(const Version &core_version, const Version &deprecated_version)
+{
+ const Version &version = get_gl_version();
+ if(deprecated_version && version>=deprecated_version && get_gl_profile()==CORE_PROFILE)
+ return false;
+ return (version>=core_version);
+}
+
+bool is_disabled(const string &ext)
{
- static Version version;
- static bool init_done=false;
+ static set<string> disabled_exts;
+ 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();
+ if(const char *disable_ptr = getenv("MSPGL_DISABLE_EXTENSIONS"))
+ {
+ vector<string> disable = split(disable_ptr);
+ disabled_exts.insert(disable.begin(), disable.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. */
+ disabled_exts.insert("GL_NV_primitive_restart");
+
+ // The core primitive restart feature does not work either.
+ disabled_exts.insert("GL_MSP_primitive_restart");
+
+ /* AMD's uniform buffer objects only work with the core version of
+ shaders. */
+ if(get_gl_version()<Version(2, 0))
+ disabled_exts.insert("GL_ARB_uniform_buffer_object");
+ }
+ }
+
+ init_done = true;
}
+ return disabled_exts.count(ext);
+}
+
+GLApi get_gl_api()
+{
+#ifdef GL_ES_VERSION_2_0
+ return OPENGL_ES2;
+#else
+ return OPENGL;
+#endif
+}
+
+inline GLProfile _get_gl_profile()
+{
+ if(get_gl_api()==OPENGL && get_gl_version()>=Version(3, 0))
+ {
+ int mask;
+ glGetIntegerv(GL_CONTEXT_PROFILE_MASK, &mask);
+ if(mask==GL_CONTEXT_CORE_PROFILE_BIT)
+ return CORE_PROFILE;
+ }
+
+ return COMPATIBILITY_PROFILE;
+}
+
+GLProfile get_gl_profile()
+{
+ static GLProfile profile = _get_gl_profile();
+ return profile;
+}
+
+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"))
+ {
+ Version force_ver(force_ver_ptr);
+ if(force_ver<ver)
+ ver = force_ver;
+ }
+
+ return ver;
+}
+
+const Version &get_gl_version()
+{
+ static Version version = _get_gl_version();
return version;
}
-void require_extension(const string &ext)
+inline Version _get_glsl_version()
{
- if(!is_supported(ext))
- throw UnsupportedExtension(ext);
+ 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;
}
-void require_version(unsigned a, unsigned b)
+const Version &get_glsl_version()
{
- const Version &ver=get_gl_version();
- if(ver.major<a || (ver.major==a && ver.minor<b))
- throw UnsupportedExtension(format("OpenGL %d.%d", a, b));
+ static Version version = _get_glsl_version();
+ return version;
}
ExtFunc *get_proc_address(const string &name)
{
-#ifndef WIN32
- return glXGetProcAddressARB(reinterpret_cast<const GLubyte *>(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
}
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