X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fextension.cpp;h=a095986123dd535d192881c2870649ae8e936e43;hp=023510da4bdce0d751317735800eb06329477559;hb=99d25b5ef615a23ef63645fea87596b3384b5ede;hpb=9dc2c20e8c7ac91d932b12492591b65786e24b0f

diff --git a/source/extension.cpp b/source/extension.cpp
index 023510da..a0959861 100644
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -2,7 +2,7 @@
 #include <cstdlib>
 #if defined(__ANDROID__)
 #include <EGL/egl.h>
-#elif !defined(WIN32) && !defined(__APPLE__)
+#elif !defined(_WIN32) && !defined(__APPLE__)
 #define GLX_GLXEXT_PROTOTYPES
 #include <GL/glx.h>
 #endif
@@ -12,6 +12,15 @@
 #include "extension.h"
 #include "gl.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 {
@@ -70,42 +79,83 @@ Require::Require(const Extension &ext)
 
 bool is_supported(const string &ext)
 {
+	if(is_disabled(ext))
+		return false;
+
 	static set<string> extensions;
 	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))
 		{
-			vector<string> exts = split(gl_ext);
-			extensions.insert(exts.begin(), exts.end());
+			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)));
 		}
-
-		string renderer = reinterpret_cast<const char *>(glGetString(GL_RENDERER));
-		if(renderer.find("Radeon")!=string::npos)
+		else
 		{
-			/* 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 *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);
+}
+
+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 set<string> disabled_exts;
+	static bool init_done = false;
+
+	if(!init_done)
+	{
 		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);
+			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 extensions.count(ext);
+	return disabled_exts.count(ext);
 }
 
 GLApi get_gl_api()
@@ -117,9 +167,32 @@ GLApi get_gl_api()
 #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()
 {
-	string gl_ver = reinterpret_cast<const char *>(glGetString(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);
 
@@ -128,7 +201,7 @@ inline Version _get_gl_version()
 	if(const char *force_ver_ptr = getenv("MSPGL_FORCE_VERSION"))
 	{
 		Version force_ver(force_ver_ptr);
-		if(!(force_ver>=ver))
+		if(force_ver<ver)
 			ver = force_ver;
 	}
 
@@ -143,7 +216,11 @@ const Version &get_gl_version()
 
 inline Version _get_glsl_version()
 {
-	string glsl_ver = reinterpret_cast<const char *>(glGetString(GL_SHADING_LANGUAGE_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);
 
@@ -152,7 +229,7 @@ inline Version _get_glsl_version()
 	if(const char *force_ver_ptr = getenv("MSPGL_FORCE_GLSL_VERSION"))
 	{
 		Version force_ver(force_ver_ptr);
-		if(!(force_ver>=ver))
+		if(force_ver<ver)
 			ver = force_ver;
 	}
 
@@ -165,14 +242,9 @@ const Version &get_glsl_version()
 	return version;
 }
 
-bool is_version_at_least(unsigned a, unsigned b)
-{
-	return get_gl_version()>=Version(a, b);
-}
-
 ExtFunc *get_proc_address(const string &name)
 {
-#if defined(WIN32)
+#if defined(_WIN32)
 	return reinterpret_cast<ExtFunc *>(wglGetProcAddress(name.c_str()));
 #elif defined(__APPLE__)
 	(void)name;