X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fextension.cpp;h=a095986123dd535d192881c2870649ae8e936e43;hp=a5ad3191b88e518bae3116039a200a784bc0d6a8;hb=99d25b5ef615a23ef63645fea87596b3384b5ede;hpb=a4ec5410595ddf37bfbc0e85ad87d31a9cbf94f1

diff --git a/source/extension.cpp b/source/extension.cpp
index a5ad3191..a0959861 100644
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -1,102 +1,258 @@
-/* $Id$
-
-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
 }