networking

external/steamworks/glmgr/glmgrext.cpp

@@ -0,0 +1,107 @@
+//============ Copyright (c) Valve Corporation, All rights reserved. ============
+//
+// glmgrext.h
+// helper file for extension testing and runtime importing of entry points
+//
+//===============================================================================
+
+#include <OpenGL/gl.h>
+#include <OpenGL/glext.h>
+#include <mach-o/dyld.h>
+#include <stdlib.h>
+#include <string.h>
+#include "glmgr.h"
+
+PFNglColorMaskIndexedEXT pfnglColorMaskIndexedEXT;
+PFNglEnableIndexedEXT pfnglEnableIndexedEXT;
+PFNglDisableIndexedEXT pfnglDisableIndexedEXT;
+PFNglGetFramebufferAttachmentParameteriv pfnglGetFramebufferAttachmentParameteriv;
+PFNglUniformBufferEXT pfnglUniformBufferEXT;
+
+// NSSymbol was deprecated in 10.5.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
+void * NSGLGetProcAddress (const char *name)
+{
+    NSSymbol symbol;
+    char *symbolName = (char *)malloc (strlen (name) + 2); 
+    strcpy(symbolName + 1, name); 
+    symbolName[0] = '_'; 
+    symbol = NULL;
+    if (NSIsSymbolNameDefined (symbolName)) 
+        symbol = NSLookupAndBindSymbol (symbolName);
+    free (symbolName);
+    return symbol ? NSAddressOfSymbol (symbol) : NULL;
+}
+
+#pragma clang diagnostic pop
+
+void GLMSetupExtensions( void )
+{
+	pfnglColorMaskIndexedEXT = (PFNglColorMaskIndexedEXT) NSGLGetProcAddress( "glColorMaskIndexedEXT" );
+	pfnglEnableIndexedEXT = (PFNglEnableIndexedEXT) NSGLGetProcAddress( "glEnableIndexedEXT" );
+	pfnglDisableIndexedEXT = (PFNglDisableIndexedEXT) NSGLGetProcAddress( "glDisableIndexedEXT" );
+
+	pfnglGetFramebufferAttachmentParameteriv = (PFNglGetFramebufferAttachmentParameteriv) NSGLGetProcAddress( "glGetFramebufferAttachmentParameteriv" );
+
+	pfnglUniformBufferEXT = (PFNglUniformBufferEXT) NSGLGetProcAddress( "glUniformBufferEXT" );
+}
+
+/*
+#define INSTANTIATE_GL_IMPORTS
+#include "glmgr.h"		// will include glmgrext.h
+#undef INSTANTIATE_GL_IMPORTS
+
+
+// helper class for looking up function names
+// see http://andrewtolbert.com/svn/personal/OpenGLSuperBible/shared/gltools.cpp
+// also http://developer.apple.com/mac/library/DOCUMENTATION/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_entrypts/opengl_entrypts.html
+
+class CFunctionImporter
+{
+public:
+	CFBundleRef m_bundle;
+
+	CFunctionImporter( CFStringRef bundleID )	// for example CFSTR("com.apple.OpenGL")
+	{
+		m_bundle = CFBundleGetBundleWithIdentifier( bundleID );
+		if ( m_bundle )
+			CFRetain( m_bundle );
+	}
+	
+	~CFunctionImporter()
+	{
+		if( m_bundle )
+		{
+			CFRelease(m_bundle);
+			m_bundle = NULL;
+		}
+	}
+		
+	void	*FindFunctionByName(CFStringRef name)		// ex CFSTR("glColorMaskedIndexedEXT")
+	{
+		void *result = NULL;
+		if (m_bundle)
+		{
+			result = CFBundleGetFunctionPointerForName(m_bundle, name);
+		}
+		return result;
+	}
+};
+
+
+void GLMSetupExtensions( void )
+{
+	CFunctionImporter	importer( CFSTR("com.apple.OpenGL") );
+	
+	#define	DO_IMPORT(name)	name = (name##FuncPtr)importer.FindFunctionByName( CFSTR(#name) );
+	
+	#ifndef GL_EXT_draw_buffers2
+		// FIXME we're not checking for the extension string yet, we're just grabbing func ptrs
+		DO_IMPORT(glColorMaskIndexedEXT);
+		DO_IMPORT(glEnableIndexedEXT);
+		DO_IMPORT(glDisableIndexedEXT);
+	#endif
+}
+*/