From 710418caebcbcb9ed22bb828cb1dcd88d6b99aa1 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 3 Oct 2013 11:02:04 +0300
Subject: [PATCH] Final touches of OS X support

---
 .gitignore           |  1 +
 scripts/extgen.py    | 32 ++++++++++++++++++++++----------
 source/extension.cpp | 11 +++++++----
 source/gl.h          |  5 +++++
 4 files changed, 35 insertions(+), 14 deletions(-)

diff --git a/.gitignore b/.gitignore
index 62e48cab..cff6fec5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ temp
 /desertpillars
 /libmspgl.a
 /libmspgl.so
+/libmspgl.dylib
 /mesh2c
 /mspgl.pc
 /shaders
diff --git a/scripts/extgen.py b/scripts/extgen.py
index 4333cf37..eef6475a 100755
--- a/scripts/extgen.py
+++ b/scripts/extgen.py
@@ -247,8 +247,13 @@ if funcs or enums:
 	for e in enums:
 		out.write("#define %s 0x%04X\n"%(e.name, e.value))
 	out.write("#endif\n\n")
+
+	# Apple's OpenGL implementation doesn't have a GetProcAddress function; link
+	# directly to the OpenGL library
+	out.write("\n#if !defined(__APPLE__) || !defined(GL_%s)\n"%ext)
 	for f in funcs:
 		out.write("extern %s %s;\n"%(f.typedef, f.name))
+	out.write("#endif\n")
 
 out.write("\nextern Extension %s;\n"%ext)
 
@@ -268,9 +273,10 @@ namespace GL {
 """)
 
 if funcs:
-	out.write("\n")
-for f in funcs:
-	out.write("%s %s = 0;\n"%(f.typedef, f.name))
+	out.write("\n#if !defined(__APPLE__) || !defined(GL_%s)\n"%ext)
+	for f in funcs:
+		out.write("%s %s = 0;\n"%(f.typedef, f.name))
+	out.write("\n#endif\n")
 
 out.write("\nExtension::SupportLevel init_%s()\n{\n"%ext.lower())
 out.write("#ifdef GL_%s\n"%ext)
@@ -279,17 +285,23 @@ if ver:
 	if backport_ext:
 		out.write(" || is_supported(\"GL_%s\")"%backport_ext)
 	out.write(")\n\t{\n")
-	for f in funcs:
-		out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, f.name))
+	if funcs:
+		out.write("#ifndef __APPLE__\n")
+		for f in funcs:
+			out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, f.name))
+		out.write("#endif\n")
 	out.write("\t\treturn Extension::CORE;\n")
 	out.write("\t}\n")
 if ext!=backport_ext:
 	out.write("\tif(is_supported(\"GL_%s\"))\n\t{\n"%(ext))
-	for f in funcs:
-		n = f.name
-		if f.source:
-			n = f.source.name
-		out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, n))
+	if funcs:
+		out.write("#ifndef __APPLE__\n")
+		for f in funcs:
+			n = f.name
+			if f.source:
+				n = f.source.name
+			out.write("\t\t%s = reinterpret_cast<%s>(get_proc_address(\"%s\"));\n"%(f.name, f.typedef, n))
+		out.write("#endif\n")
 	out.write("\t\treturn Extension::EXTENSION;\n")
 	out.write("\t}\n")
 out.write("#endif\n")
diff --git a/source/extension.cpp b/source/extension.cpp
index d4acedaf..56f96d4e 100644
--- a/source/extension.cpp
+++ b/source/extension.cpp
@@ -1,5 +1,5 @@
 #include <set>
-#ifndef WIN32
+#if !defined(WIN32) && !defined(__APPLE__)
 #define GLX_GLXEXT_PROTOTYPES
 #include <GL/glx.h>
 #endif
@@ -92,10 +92,13 @@ bool is_version_at_least(unsigned a, unsigned 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
+#else
+	return glXGetProcAddressARB(reinterpret_cast<const unsigned char *>(name.c_str()));
 #endif
 }
 
diff --git a/source/gl.h b/source/gl.h
index 2c77d680..05844ba5 100644
--- a/source/gl.h
+++ b/source/gl.h
@@ -4,7 +4,12 @@
 #ifdef WIN32
 #include <windows.h>
 #endif
+#ifdef __APPLE__
+#include <OpenGL/gl.h>
+#include <OpenGL/glext.h>
+#else
 #include <GL/gl.h>
 #include <GL/glext.h>
+#endif
 
 #endif
-- 
2.43.0