Use git instead of clone to download OpenGL registry.

Core-profile extension query patch by Carsten Neumann
https://sourceforge.net/p/glew/bugs/174/

auto/Makefile

@@ -11,11 +11,15 @@ include ../config/version
 
 SHELL = bash
 
+### Use git repository for GL extension specifications
+
+GIT_CLONE  ?= git clone --branch glew https://github.com/nigels-com/glfixes.git
+
 ###
 ### Conventional desktop OpenGL settings
 ###
 
-REGISTRY     = registry/gl
+REGISTRY     = registry/gl/specs
 EXT          = extensions/gl
 FILTER       = filter_gl_ext.sh
 CORE         = core/gl
@@ -38,11 +42,11 @@ BLACKLIST = blacklist
 GL_CORE_SPEC := $(CORE)/GL_VERSION*
 GLX_CORE_SPEC := $(CORE)/GLX_VERSION*
 ifeq (custom,$(MAKECMDGOALS))
-#GL_CORE_SPEC := $(shell grep GL_VERSION custom.txt | sed 's/\(.*\)/$(CORE)\/\1/g;')
+#GL_CORE_SPEC  := $(shell grep GL_VERSION custom.txt    |                       perl -pi -e "s=^=$(CORE)/=g;")
-GL_EXT_SPEC := $(shell grep "^[ \t]*GL_" custom.txt | grep -v GL_VERSION | sed 's/\(.*\)/$(EXT)\/\1/g;')
+GL_EXT_SPEC    := $(shell grep "^[ \t]*GL_" custom.txt  | grep -v GL_VERSION  | perl -pi -e "s=^=$(EXT)/=g;")
-WGL_EXT_SPEC := $(shell grep "^[ \t]*WGL_" custom.txt | sed 's/\(.*\)/$(EXT)\/\1/g;')
+WGL_EXT_SPEC   := $(shell grep "^[ \t]*WGL_" custom.txt |                       perl -pi -e "s=^=$(EXT)/=g;")
-#GLX_CORE_SPEC := $(shell grep GLX_VERSION custom.txt | sed 's/\(.*\)/$(CORE)\/\1/g;')
+#GLX_CORE_SPEC := $(shell grep GLX_VERSION custom.txt   |                       perl -pi -e "s=^=$(CORE)/=g;")
-GLX_EXT_SPEC := $(shell grep "^[ \t]*GLX_" custom.txt | grep -v GLX_VERSION | sed 's/\(.*\)/$(EXT)\/\1/g;')
+GLX_EXT_SPEC   := $(shell grep "^[ \t]*GLX_" custom.txt | grep -v GLX_VERSION | perl -pi -e "s=^=$(EXT)/=g;")
 else
 GL_EXT_SPEC := $(EXT)/GL_*
 WGL_EXT_SPEC := $(EXT)/WGL_*
@@ -97,11 +101,11 @@ all custom: $(I.TARGETS) $(S.TARGETS) $(D.TARGETS) $(B.TARGETS)
 registry: $(REGISTRY)/.dummy
 ext: $(EXT)/.dummy
 
-$(REGISTRY)/.dummy: $(BIN)/update_registry.sh
+$(REGISTRY)/.dummy:
 	@echo "--------------------------------------------------------------------"
 	@echo "Downloading registry"
 	@echo "--------------------------------------------------------------------"
-	$(BIN)/update_registry.sh $(REGISTRY) $(REGISTRY_URL)
+	$(GIT_CLONE) registry
 	touch $@
 
 $(EXT)/.dummy: $(REGISTRY)/.dummy
@@ -138,7 +142,7 @@ $(I.DEST)/glew.h: $(EXT)/.dummy
 	echo -e "\n#if defined(GLEW_MX) && !defined(_WIN32)\nstruct GLEWContextStruct\n{\n#endif /* GLEW_MX */\n" >> $@
 	$(BIN)/make_struct_var.pl GLEW_VAR_EXPORT $(GL_CORE_SPEC) $(GL_EXT_SPEC) >> $@
 	echo -e "\n#ifdef GLEW_MX\n}; /* GLEWContextStruct */\n#endif /* GLEW_MX */\n" >> $@
-	perl -e 's/GLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_2;/GLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_1;\nGLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_2;/' -pi $@
+	perl -e "s/GLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_2;/GLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_1;\nGLEW_VAR_EXPORT GLboolean __GLEW_VERSION_1_2;/" -pi $@
 	rm -f $@.bak
 	cat $(SRC)/glew_tail.h >> $@
 
@@ -165,14 +169,14 @@ $(I.DEST)/glxew.h: $(EXT)/.dummy
 	cat $(SRC)/mesa_license.h >> $@
 	cat $(SRC)/khronos_license.h >> $@
 	cat $(SRC)/glxew_head.h >> $@
-	$(BIN)/make_header.pl '' GLX $(GLX_CORE_SPEC) >> $@
+	$(BIN)/make_header.pl "" GLX $(GLX_CORE_SPEC) >> $@
-	$(BIN)/make_header.pl '' GLX $(GLX_EXT_SPEC) >> $@
+	$(BIN)/make_header.pl "" GLX $(GLX_EXT_SPEC) >> $@
 	cat $(SRC)/glxew_mid.h >> $@
 	$(BIN)/make_struct_fun.pl GLXEW_FUN_EXPORT $(GLX_CORE_SPEC) $(GLX_EXT_SPEC) >> $@
 	echo -e "\n#if defined(GLEW_MX)\nstruct GLXEWContextStruct\n{\n#endif /* GLEW_MX */\n" >> $@
 	$(BIN)/make_struct_var.pl GLXEW_VAR_EXPORT $(GLX_CORE_SPEC) $(GLX_EXT_SPEC) >> $@
 	echo -e "\n#ifdef GLEW_MX\n}; /* GLXEWContextStruct */\n#endif /* GLEW_MX */\n" >> $@
-	perl -e 's/GLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_2;/GLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_0;\nGLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_1;\nGLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_2;/' -pi $@
+	perl -e "s/GLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_2;/GLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_0;\nGLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_1;\nGLXEW_VAR_EXPORT GLboolean __GLXEW_VERSION_1_2;/" -pi $@
 	cat $(SRC)/glxew_tail.h >> $@
 
 $(S.DEST)/glew.c: $(EXT)/.dummy
@@ -193,8 +197,9 @@ $(S.DEST)/glew.c: $(EXT)/.dummy
 	$(BIN)/make_init.pl GL $(GL_CORE_SPEC) >> $@
 	$(BIN)/make_init.pl GL $(GL_EXT_SPEC) >> $@
 	cat $(SRC)/glew_init_gl.c >> $@
-	$(BIN)/make_list.pl $(GL_CORE_SPEC) | grep -v '\"GL_VERSION' >> $@
+	$(BIN)/make_list_gl.pl $(GL_CORE_SPEC) | grep -v '\"GL_VERSION' >> $@
-	$(BIN)/make_list.pl $(GL_EXT_SPEC) >> $@
+	cat $(SRC)/glew_init_gl_2.c >> $@
+	$(BIN)/make_list_gl.pl $(GL_EXT_SPEC) >> $@
 	echo -e "\n  return GLEW_OK;\n}\n" >> $@
 	echo -e "\n#if defined(_WIN32)" >> $@
 	echo -e "\n#if !defined(GLEW_MX)" >> $@
@@ -270,6 +275,7 @@ $(S.DEST)/glew_init.c: $(EXT)/.dummy
 	$(BIN)/make_init.pl GL $(GL_EXT_SPEC) >> $@
 	cat $(SRC)/glew_init_gl.c >> $@
 	$(BIN)/make_list.pl $(GL_CORE_SPEC) | grep -v '\"GL_VERSION' >> $@
+	cat $(SRC)/glew_init_gl_2.c >> $@
 	$(BIN)/make_list.pl $(GL_EXT_SPEC) >> $@
 	echo -e "\n  return GLEW_OK;\n}\n\n#if defined(_WIN32)\n" >> $@;
 	$(BIN)/make_init.pl WGL $(WGL_EXT_SPEC) >> $@
@@ -382,4 +388,4 @@ clobber: clean
 	rm -rf $(EXT)
 
 destroy: clobber
-	rm -rf $(REGISTRY)
+	rm -rf registry

auto/bin/make_list_gl.pl

@@ -0,0 +1,66 @@
+#!/usr/bin/perl
+##
+## Copyright (C) 2002-2008, Marcelo E. Magallon <mmagallo[]debian org>
+## Copyright (C) 2002-2008, Milan Ikits <milan ikits[]ieee org>
+##
+## This program is distributed under the terms and conditions of the GNU
+## General Public License Version 2 as published by the Free Software
+## Foundation or, at your option, any later version.
+
+use strict;
+use warnings;
+
+do 'bin/make.pl';
+
+#---------------------------------------------------------------------------------------
+
+# function pointer definition
+sub make_init_call($%)
+{
+    my $name = prefixname($_[0]);
+    return "  r = r || (" . $_[0] . " = (PFN" . (uc $_[0]) . "PROC)glewGetProcAddress(\"" . $name . "\")) == NULL;";
+}
+
+#---------------------------------------------------------------------------------------
+
+my @extlist = ();
+my %extensions = ();
+
+if (@ARGV)
+{
+    @extlist = @ARGV;
+
+	foreach my $ext (sort @extlist)
+	{
+		my ($extname, $exturl, $extstring, $types, $tokens, $functions, $exacts) = parse_ext($ext);
+
+		my $extvar = $extname;
+		$extvar =~ s/GL(X*)_/GL$1EW_/;
+
+		my $extpre = $extname;
+		$extpre =~ s/^(W?)GL(X?).*$/\l$1gl\l$2ew/;
+
+		#my $pextvar = prefix_varname($extvar);
+
+		print "#ifdef $extname\n";
+
+		if (length($extstring))
+		{
+				print "  CONST_CAST(" . $extvar . ") = _glewSearchExtensionArray(\"$extstring\", extArrayStart, extArrayEnd);\n";
+		}
+
+		if (keys %$functions)
+		{
+			if ($extname =~ /WGL_.*/)
+			{
+				print "  if (glewExperimental || " . $extvar . "|| crippled) CONST_CAST(" . $extvar . ")= !_glewInit_$extname(GLEW_CONTEXT_ARG_VAR_INIT);\n";
+			}
+			else
+			{
+				print "  if (glewExperimental || " . $extvar . ") CONST_CAST(" . $extvar . ") = !_glewInit_$extname(GLEW_CONTEXT_ARG_VAR_INIT);\n";
+			}
+		}
+		print "#endif /* $extname */\n";
+	}
+
+}

auto/bin/parse_spec.pl

@@ -307,8 +307,7 @@ my @speclist = ();
 my %extensions = ();
 
 my $ext_dir = shift;
-my $reg_http = "http://www.opengl.org/registry/specs/";
+my $reg_http = "http://www.opengl.org/registry/specs/gl/";
-#my $reg_http = "http://oss.sgi.com/projects/ogl-sample/";
 
 # Take command line arguments or read list from file
 if (@ARGV)
@@ -329,7 +328,7 @@ foreach my $spec (sort @speclist)
         open EXT, ">$info";
         print EXT $ext . "\n";                       # Extension name
         my $specname = $spec;
-        $specname =~ s/registry\///;
+        $specname =~ s/registry\/gl\/specs\///;
         print EXT $reg_http . $specname . "\n";      # Extension info URL
         print EXT $ext . "\n";                       # Extension string
 

auto/bin/update_registry.sh

@@ -1,33 +0,0 @@
-#!/bin/sh
-##
-## Copyright (C) 2002-2008, Marcelo E. Magallon <mmagallo[]debian org>
-## Copyright (C) 2002-2008, Milan Ikits <milan ikits[]ieee org>
-##
-## This program is distributed under the terms and conditions of the GNU
-## General Public License Version 2 as published by the Free Software
-## Foundation or, at your option, any later version.
-
-set -e
-
-if [ ! -d $1 ] ; then
-    mkdir -p $1
-fi
-cd $1
-
-# wget used to return 0 (success), but more recent versions
-# don't so we don't want to bail out in failure mode
-# eventhough everything is fine.
-
-set +e
-
-wget                                                    \
-    --mirror                                            \
-    --no-parent                                         \
-    --no-host-directories                               \
-    --cut-dirs=2                                        \
-    --accept=txt,html                                   \
-    $2
-
-echo 'wget exit code: ' $?
-
-exit 0

auto/src/glew_head.c

@@ -247,3 +247,18 @@ static GLboolean _glewSearchExtension (const char* name, const GLubyte *start, c
   }
   return GL_FALSE;
 }
+
+static GLboolean _glewSearchExtensionArray (const char* name, const GLubyte** start, const GLubyte** end)
+{
+  const GLubyte** p;
+  GLuint len = _glewStrLen((const GLubyte*)name);
+  p = start;
+  while (p < end)
+  {
+    GLuint n = _glewStrCLen(*p, ' ');
+    if (len == n && _glewStrSame((const GLubyte*)name, *p, n)) return GL_TRUE;
+    p += 1;
+  }
+  return GL_FALSE;
+}
+

auto/src/glew_init_gl.c

@@ -4,12 +4,36 @@ GLboolean GLEWAPIENTRY glewGetExtension (const char* name)
 {
   const GLubyte* start;
   const GLubyte* end;
+  GLuint dot;
+  GLint numExt, i, major;
+  /* query opengl version to decide how to enumerate extensions */
+  start = glGetString(GL_VERSION);
+  dot = _glewStrCLen(start, '.');
+  if (dot == 0)
+      return GL_FALSE;
+  major = start[dot-1]-'0';
+
+  if (major >= 3)
+  {
+      glGetIntegerv(GL_NUM_EXTENSIONS, &numExt);
+      for(i = 0; i < numExt; ++i)
+      {
+          start = glGetStringi(GL_EXTENSIONS, i);
+          end = start + _glewStrLen(start);
+          if(_glewSearchExtension(name, start, end) == GL_TRUE)
+              return GL_TRUE;
+      }
+  }
+  else
+  {
     start = (const GLubyte*)glGetString(GL_EXTENSIONS);
     if (start == 0)
       return GL_FALSE;
     end = start + _glewStrLen(start);
     return _glewSearchExtension(name, start, end);
   }
+  return GL_FALSE;
+}
 
 /* ------------------------------------------------------------------------- */
 
@@ -21,6 +45,9 @@ GLenum GLEWAPIENTRY glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
   const GLubyte* s;
   GLuint dot;
   GLint major, minor;
+  const GLubyte*  extArray[1000];
+  const GLubyte** extArrayStart;
+  const GLubyte** extArrayEnd;
   const GLubyte* extStart;
   const GLubyte* extEnd;
   /* query opengl version */
@@ -62,10 +89,4 @@ GLenum GLEWAPIENTRY glewContextInit (GLEW_CONTEXT_ARG_DEF_LIST)
     CONST_CAST(GLEW_VERSION_1_1)   = GLEW_VERSION_1_2   == GL_TRUE || ( major == 1 && minor >= 1 ) ? GL_TRUE : GL_FALSE;
   }
 
-  /* query opengl extensions string */
+  /* initialize core */
-  extStart = glGetString(GL_EXTENSIONS);
-  if (extStart == 0)
-    extStart = (const GLubyte*)"";
-  extEnd = extStart + _glewStrLen(extStart);
-
-  /* initialize extensions */

auto/src/glew_init_gl_2.c

@@ -0,0 +1,44 @@
+
+  /* get extensions */
+  if (GLEW_VERSION_3_0 == GL_TRUE)
+  {
+    GLint numExt;
+    GLint i;
+    glGetIntegerv(GL_NUM_EXTENSIONS, &numExt);
+
+    for(i = 0; i < numExt; ++i)
+    {
+      extArray[i] = glGetStringi(GL_EXTENSIONS, i);
+    }
+
+    extArrayStart = &extArray[0];
+    extArrayEnd   = &extArray[i];
+  }
+  else
+  {
+    int i;
+
+    extStart = glGetString(GL_EXTENSIONS);
+    if (extStart == 0)
+      extStart = (const GLubyte*)"";
+    extEnd = extStart + _glewStrLen(extStart);
+    i = 0;
+
+    while (extStart < extEnd)
+    {
+      int len = _glewStrCLen(extStart, ' ');
+
+      if (len > 0)
+      {
+        extArray[i] = extStart;
+        i += 1;
+      }
+
+      extStart += len + 1;
+    }
+
+    extArrayStart = &extArray[0];
+    extArrayEnd   = &extArray[i];
+  }
+
+  /* initialize extensions */