diff --git a/src/Graphics/OpenGLContext/GLFunctions.cpp b/src/Graphics/OpenGLContext/GLFunctions.cpp
index b454029e..5840b862 100644
--- a/src/Graphics/OpenGLContext/GLFunctions.cpp
+++ b/src/Graphics/OpenGLContext/GLFunctions.cpp
@@ -3,7 +3,7 @@
 #ifdef OS_WINDOWS
 
 #define glGetProcAddress wglGetProcAddress
-#define GL_GET_PROC_ADR(proc_type, proc_name) proc_name = (proc_type) glGetProcAddress(#proc_name)
+#define GL_GET_PROC_ADR(proc_type, proc_name) g_##proc_name = (proc_type) glGetProcAddress(#proc_name)
 
 #elif defined(OS_LINUX)
 
@@ -19,141 +19,141 @@ typedef struct __GLXFBConfigRec *GLXFBConfig;
 #define GLX_GLXEXT_PROTOTYPES
 #include <GL/glxext.h>
 #define glGetProcAddress glXGetProcAddress
-#define GL_GET_PROC_ADR(proc_type, proc_name) proc_name = (proc_type) glGetProcAddress((const GLubyte*)#proc_name)
+#define GL_GET_PROC_ADR(proc_type, proc_name) g_##proc_name = (proc_type) glGetProcAddress((const GLubyte*)#proc_name)
 
 #elif defined(EGL)
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #define glGetProcAddress eglGetProcAddress
-#define GL_GET_PROC_ADR(proc_type, proc_name) proc_name = (proc_type) glGetProcAddress(#proc_name)
+#define GL_GET_PROC_ADR(proc_type, proc_name) g_##proc_name = (proc_type) glGetProcAddress(#proc_name)
 
 #endif
 
 //GL Fucntions
 
 #ifdef OS_WINDOWS
-PFNGLACTIVETEXTUREPROC glActiveTexture;
-PFNGLBLENDCOLORPROC glBlendColor;
+PFNGLACTIVETEXTUREPROC g_glActiveTexture;
+PFNGLBLENDCOLORPROC g_glBlendColor;
 #elif defined(EGL)
-PFNGLBLENDFUNCPROC glBlendFunc;
-PFNGLPIXELSTOREIPROC glPixelStorei;
-PFNGLCLEARCOLORPROC glClearColor;
-PFNGLCULLFACEPROC glCullFace;
-PFNGLDEPTHFUNCPROC glDepthFunc;
-PFNGLDEPTHMASKPROC glDepthMask;
-PFNGLDISABLEPROC glDisable;
-PFNGLENABLEPROC glEnable;
-PFNGLPOLYGONOFFSETPROC glPolygonOffset;
-PFNGLSCISSORPROC glScissor;
-PFNGLVIEWPORTPROC glViewport;
-PFNGLBINDTEXTUREPROC glBindTexture;
-PFNGLTEXIMAGE2DPROC glTexImage2D;
-PFNGLTEXPARAMETERIPROC glTexParameteri;
-PFNGLGETINTEGERVPROC glGetIntegerv;
-PFNGLGETSTRINGPROC glGetString;
-PFNGLREADPIXELSPROC glReadPixels;
-PFNGLTEXSUBIMAGE2DPROC glTexSubImage2D;
-PFNGLDRAWARRAYSPROC glDrawArrays;
-PFNGLGETERRORPROC glGetError;
-PFNGLDRAWELEMENTSPROC glDrawElements;
-PFNGLLINEWIDTHPROC glLineWidth;
-PFNGLCLEARPROC glClear;
-PFNGLGETFLOATVPROC glGetFloatv;
-PFNGLDELETETEXTURESPROC glDeleteTextures;
-PFNGLGENTEXTURESPROC glGenTextures;
-PFNGLTEXPARAMETERFPROC glTexParameterf;
-PFNGLACTIVETEXTUREPROC glActiveTexture;
-PFNGLBLENDCOLORPROC glBlendColor;
-PFNGLREADBUFFERPROC glReadBuffer;
+PFNGLBLENDFUNCPROC g_glBlendFunc;
+PFNGLPIXELSTOREIPROC g_glPixelStorei;
+PFNGLCLEARCOLORPROC g_glClearColor;
+PFNGLCULLFACEPROC g_glCullFace;
+PFNGLDEPTHFUNCPROC g_glDepthFunc;
+PFNGLDEPTHMASKPROC g_glDepthMask;
+PFNGLDISABLEPROC g_glDisable;
+PFNGLENABLEPROC g_glEnable;
+PFNGLPOLYGONOFFSETPROC g_glPolygonOffset;
+PFNGLSCISSORPROC g_glScissor;
+PFNGLVIEWPORTPROC g_glViewport;
+PFNGLBINDTEXTUREPROC g_glBindTexture;
+PFNGLTEXIMAGE2DPROC g_glTexImage2D;
+PFNGLTEXPARAMETERIPROC g_glTexParameteri;
+PFNGLGETINTEGERVPROC g_glGetIntegerv;
+PFNGLGETSTRINGPROC g_glGetString;
+PFNGLREADPIXELSPROC g_glReadPixels;
+PFNGLTEXSUBIMAGE2DPROC g_glTexSubImage2D;
+PFNGLDRAWARRAYSPROC g_glDrawArrays;
+PFNGLGETERRORPROC g_glGetError;
+PFNGLDRAWELEMENTSPROC g_glDrawElements;
+PFNGLLINEWIDTHPROC g_glLineWidth;
+PFNGLCLEARPROC g_glClear;
+PFNGLGETFLOATVPROC g_glGetFloatv;
+PFNGLDELETETEXTURESPROC g_glDeleteTextures;
+PFNGLGENTEXTURESPROC g_glGenTextures;
+PFNGLTEXPARAMETERFPROC g_glTexParameterf;
+PFNGLACTIVETEXTUREPROC g_glActiveTexture;
+PFNGLBLENDCOLORPROC g_glBlendColor;
+PFNGLREADBUFFERPROC g_glReadBuffer;
 #endif
-PFNGLCREATESHADERPROC glCreateShader;
-PFNGLCOMPILESHADERPROC glCompileShader;
-PFNGLSHADERSOURCEPROC glShaderSource;
-PFNGLCREATEPROGRAMPROC glCreateProgram;
-PFNGLATTACHSHADERPROC glAttachShader;
-PFNGLLINKPROGRAMPROC glLinkProgram;
-PFNGLUSEPROGRAMPROC glUseProgram;
-PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
-PFNGLUNIFORM1IPROC glUniform1i;
-PFNGLUNIFORM1FPROC glUniform1f;
-PFNGLUNIFORM2FPROC glUniform2f;
-PFNGLUNIFORM2IPROC glUniform2i;
-PFNGLUNIFORM4IPROC glUniform4i;
-PFNGLUNIFORM4FPROC glUniform4f;
-PFNGLUNIFORM3FVPROC glUniform3fv;
-PFNGLUNIFORM4FVPROC glUniform4fv;
-PFNGLDETACHSHADERPROC glDetachShader;
-PFNGLDELETESHADERPROC glDeleteShader;
-PFNGLDELETEPROGRAMPROC glDeleteProgram;
-PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
-PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
-PFNGLGETSHADERIVPROC glGetShaderiv;
-PFNGLGETPROGRAMIVPROC glGetProgramiv;
+PFNGLCREATESHADERPROC g_glCreateShader;
+PFNGLCOMPILESHADERPROC g_glCompileShader;
+PFNGLSHADERSOURCEPROC g_glShaderSource;
+PFNGLCREATEPROGRAMPROC g_glCreateProgram;
+PFNGLATTACHSHADERPROC g_glAttachShader;
+PFNGLLINKPROGRAMPROC g_glLinkProgram;
+PFNGLUSEPROGRAMPROC g_glUseProgram;
+PFNGLGETUNIFORMLOCATIONPROC g_glGetUniformLocation;
+PFNGLUNIFORM1IPROC g_glUniform1i;
+PFNGLUNIFORM1FPROC g_glUniform1f;
+PFNGLUNIFORM2FPROC g_glUniform2f;
+PFNGLUNIFORM2IPROC g_glUniform2i;
+PFNGLUNIFORM4IPROC g_glUniform4i;
+PFNGLUNIFORM4FPROC g_glUniform4f;
+PFNGLUNIFORM3FVPROC g_glUniform3fv;
+PFNGLUNIFORM4FVPROC g_glUniform4fv;
+PFNGLDETACHSHADERPROC g_glDetachShader;
+PFNGLDELETESHADERPROC g_glDeleteShader;
+PFNGLDELETEPROGRAMPROC g_glDeleteProgram;
+PFNGLGETPROGRAMINFOLOGPROC g_glGetProgramInfoLog;
+PFNGLGETSHADERINFOLOGPROC g_glGetShaderInfoLog;
+PFNGLGETSHADERIVPROC g_glGetShaderiv;
+PFNGLGETPROGRAMIVPROC g_glGetProgramiv;
 
-PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
-PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
-PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
-PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation;
-PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f;
-PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv;
+PFNGLENABLEVERTEXATTRIBARRAYPROC g_glEnableVertexAttribArray;
+PFNGLDISABLEVERTEXATTRIBARRAYPROC g_glDisableVertexAttribArray;
+PFNGLVERTEXATTRIBPOINTERPROC g_glVertexAttribPointer;
+PFNGLBINDATTRIBLOCATIONPROC g_glBindAttribLocation;
+PFNGLVERTEXATTRIB4FPROC g_glVertexAttrib4f;
+PFNGLVERTEXATTRIB4FVPROC g_glVertexAttrib4fv;
 
 // multitexture functions
-PFNGLDEPTHRANGEFPROC glDepthRangef;
-PFNGLCLEARDEPTHFPROC glClearDepthf;
+PFNGLDEPTHRANGEFPROC g_glDepthRangef;
+PFNGLCLEARDEPTHFPROC g_glClearDepthf;
 
-PFNGLDRAWBUFFERSPROC glDrawBuffers;
-PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
-PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
-PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
-PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
-PFNGLTEXIMAGE2DMULTISAMPLEPROC glTexImage2DMultisample;
-PFNGLTEXSTORAGE2DMULTISAMPLEPROC glTexStorage2DMultisample;
-PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers;
-PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer;
-PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage;
-PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
-PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers;
-PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
-PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer;
-PFNGLGENBUFFERSPROC glGenBuffers;
-PFNGLBINDBUFFERPROC glBindBuffer;
-PFNGLBUFFERDATAPROC glBufferData;
-PFNGLMAPBUFFERPROC glMapBuffer;
-PFNGLMAPBUFFERRANGEPROC glMapBufferRange;
-PFNGLUNMAPBUFFERPROC glUnmapBuffer;
-PFNGLDELETEBUFFERSPROC glDeleteBuffers;
-PFNGLBINDIMAGETEXTUREPROC glBindImageTexture;
-PFNGLMEMORYBARRIERPROC glMemoryBarrier;
-PFNGLGETSTRINGIPROC glGetStringi;
-PFNGLINVALIDATEFRAMEBUFFERPROC glInvalidateFramebuffer;
-PFNGLBUFFERSTORAGEPROC glBufferStorage;
-PFNGLFENCESYNCPROC glFenceSync;
-PFNGLCLIENTWAITSYNCPROC glClientWaitSync;
-PFNGLDELETESYNCPROC glDeleteSync;
+PFNGLDRAWBUFFERSPROC g_glDrawBuffers;
+PFNGLBINDFRAMEBUFFERPROC g_glBindFramebuffer;
+PFNGLDELETEFRAMEBUFFERSPROC g_glDeleteFramebuffers;
+PFNGLGENFRAMEBUFFERSPROC g_glGenFramebuffers;
+PFNGLFRAMEBUFFERTEXTURE2DPROC g_glFramebufferTexture2D;
+PFNGLTEXIMAGE2DMULTISAMPLEPROC g_glTexImage2DMultisample;
+PFNGLTEXSTORAGE2DMULTISAMPLEPROC g_glTexStorage2DMultisample;
+PFNGLGENRENDERBUFFERSPROC g_glGenRenderbuffers;
+PFNGLBINDRENDERBUFFERPROC g_glBindRenderbuffer;
+PFNGLRENDERBUFFERSTORAGEPROC g_glRenderbufferStorage;
+PFNGLFRAMEBUFFERRENDERBUFFERPROC g_glFramebufferRenderbuffer;
+PFNGLDELETERENDERBUFFERSPROC g_glDeleteRenderbuffers;
+PFNGLCHECKFRAMEBUFFERSTATUSPROC g_glCheckFramebufferStatus;
+PFNGLBLITFRAMEBUFFERPROC g_glBlitFramebuffer;
+PFNGLGENBUFFERSPROC g_glGenBuffers;
+PFNGLBINDBUFFERPROC g_glBindBuffer;
+PFNGLBUFFERDATAPROC g_glBufferData;
+PFNGLMAPBUFFERPROC g_glMapBuffer;
+PFNGLMAPBUFFERRANGEPROC g_glMapBufferRange;
+PFNGLUNMAPBUFFERPROC g_glUnmapBuffer;
+PFNGLDELETEBUFFERSPROC g_glDeleteBuffers;
+PFNGLBINDIMAGETEXTUREPROC g_glBindImageTexture;
+PFNGLMEMORYBARRIERPROC g_glMemoryBarrier;
+PFNGLGETSTRINGIPROC g_glGetStringi;
+PFNGLINVALIDATEFRAMEBUFFERPROC g_glInvalidateFramebuffer;
+PFNGLBUFFERSTORAGEPROC g_glBufferStorage;
+PFNGLFENCESYNCPROC g_glFenceSync;
+PFNGLCLIENTWAITSYNCPROC g_glClientWaitSync;
+PFNGLDELETESYNCPROC g_glDeleteSync;
 
-PFNGLGETUNIFORMBLOCKINDEXPROC glGetUniformBlockIndex;
-PFNGLUNIFORMBLOCKBINDINGPROC glUniformBlockBinding;
-PFNGLGETACTIVEUNIFORMBLOCKIVPROC glGetActiveUniformBlockiv;
-PFNGLGETUNIFORMINDICESPROC glGetUniformIndices;
-PFNGLGETACTIVEUNIFORMSIVPROC glGetActiveUniformsiv;
-PFNGLBINDBUFFERBASEPROC glBindBufferBase;
-PFNGLBUFFERSUBDATAPROC glBufferSubData;
+PFNGLGETUNIFORMBLOCKINDEXPROC g_glGetUniformBlockIndex;
+PFNGLUNIFORMBLOCKBINDINGPROC g_glUniformBlockBinding;
+PFNGLGETACTIVEUNIFORMBLOCKIVPROC g_glGetActiveUniformBlockiv;
+PFNGLGETUNIFORMINDICESPROC g_glGetUniformIndices;
+PFNGLGETACTIVEUNIFORMSIVPROC g_glGetActiveUniformsiv;
+PFNGLBINDBUFFERBASEPROC g_glBindBufferBase;
+PFNGLBUFFERSUBDATAPROC g_glBufferSubData;
 
-PFNGLGETPROGRAMBINARYPROC glGetProgramBinary;
-PFNGLPROGRAMBINARYPROC glProgramBinary;
-PFNGLPROGRAMPARAMETERIPROC glProgramParameteri;
+PFNGLGETPROGRAMBINARYPROC g_glGetProgramBinary;
+PFNGLPROGRAMBINARYPROC g_glProgramBinary;
+PFNGLPROGRAMPARAMETERIPROC g_glProgramParameteri;
 
-PFNGLTEXSTORAGE2DPROC glTexStorage2D;
-PFNGLTEXTURESTORAGE2DPROC glTextureStorage2D;
-PFNGLTEXTURESUBIMAGE2DPROC glTextureSubImage2D;
-PFNGLTEXTURESTORAGE2DMULTISAMPLEEXTPROC glTextureStorage2DMultisample;
-PFNGLTEXTUREPARAMETERIPROC glTextureParameteri;
-PFNGLTEXTUREPARAMETERFPROC glTextureParameterf;
-PFNGLCREATETEXTURESPROC glCreateTextures;
-PFNGLCREATEBUFFERSPROC glCreateBuffers;
-PFNGLCREATEFRAMEBUFFERSPROC glCreateFramebuffers;
-PFNGLNAMEDFRAMEBUFFERTEXTUREPROC glNamedFramebufferTexture;
+PFNGLTEXSTORAGE2DPROC g_glTexStorage2D;
+PFNGLTEXTURESTORAGE2DPROC g_glTextureStorage2D;
+PFNGLTEXTURESUBIMAGE2DPROC g_glTextureSubImage2D;
+PFNGLTEXTURESTORAGE2DMULTISAMPLEEXTPROC g_glTextureStorage2DMultisample;
+PFNGLTEXTUREPARAMETERIPROC g_glTextureParameteri;
+PFNGLTEXTUREPARAMETERFPROC g_glTextureParameterf;
+PFNGLCREATETEXTURESPROC g_glCreateTextures;
+PFNGLCREATEBUFFERSPROC g_glCreateBuffers;
+PFNGLCREATEFRAMEBUFFERSPROC g_glCreateFramebuffers;
+PFNGLNAMEDFRAMEBUFFERTEXTUREPROC g_glNamedFramebufferTexture;
 
 void initGLFunctions()
 {
diff --git a/src/Graphics/OpenGLContext/GLFunctions.h b/src/Graphics/OpenGLContext/GLFunctions.h
index 68de8300..b1c2b0c7 100644
--- a/src/Graphics/OpenGLContext/GLFunctions.h
+++ b/src/Graphics/OpenGLContext/GLFunctions.h
@@ -17,131 +17,252 @@
 #include <GL/glext.h>
 
 #ifdef EGL
+#define glBlendFunc g_glBlendFunc
+#define glPixelStorei g_glPixelStorei
+#define glClearColor g_glClearColor
+#define glCullFace g_glCullFace
+#define glDepthFunc g_glDepthFunc
+#define glDepthMask g_glDepthMask
+#define glDisable g_glDisable
+#define glEnable g_glEnable
+#define glPolygonOffset g_glPolygonOffset
+#define glScissor g_glScissor
+#define glViewport g_glViewport
+#define glBindTexture g_glBindTexture
+#define glTexImage2D g_glTexImage2D
+#define glTexParameteri g_glTexParameteri
+#define glGetIntegerv g_glGetIntegerv
+#define glGetString g_glGetString
+#define glReadPixels g_glReadPixels
+#define glTexSubImage2D g_glTexSubImage2D
+#define glDrawArrays g_glDrawArrays
+#define glGetError g_glGetError
+#define glDrawElements g_glDrawElements
+#define glLineWidth g_glLineWidth
+#define glClear g_glClear
+#define glGetFloatv g_glGetFloatv
+#define glDeleteTextures g_glDeleteTextures
+#define glGenTextures g_glGenTextures
+#define glTexParameterf g_glTexParameterf
+#define glActiveTexture g_glActiveTexture
+#define glBlendColor g_glBlendColor
+#define glReadBuffer g_glReadBuffer
 
-extern PFNGLBLENDFUNCPROC glBlendFunc;
-extern PFNGLPIXELSTOREIPROC glPixelStorei;
-extern PFNGLCLEARCOLORPROC glClearColor;
-extern PFNGLCULLFACEPROC glCullFace;
-extern PFNGLDEPTHFUNCPROC glDepthFunc;
-extern PFNGLDEPTHMASKPROC glDepthMask;
-extern PFNGLDISABLEPROC glDisable;
-extern PFNGLENABLEPROC glEnable;
-extern PFNGLPOLYGONOFFSETPROC glPolygonOffset;
-extern PFNGLSCISSORPROC glScissor;
-extern PFNGLVIEWPORTPROC glViewport;
-extern PFNGLBINDTEXTUREPROC glBindTexture;
-extern PFNGLTEXIMAGE2DPROC glTexImage2D;
-extern PFNGLTEXPARAMETERIPROC glTexParameteri;
-extern PFNGLGETINTEGERVPROC glGetIntegerv;
-extern PFNGLGETSTRINGPROC glGetString;
-extern PFNGLREADPIXELSPROC glReadPixels;
-extern PFNGLTEXSUBIMAGE2DPROC glTexSubImage2D;
-extern PFNGLDRAWARRAYSPROC glDrawArrays;
-extern PFNGLGETERRORPROC glGetError;
-extern PFNGLDRAWELEMENTSPROC glDrawElements;
-extern PFNGLLINEWIDTHPROC glLineWidth;
-extern PFNGLCLEARPROC glClear;
-extern PFNGLGETFLOATVPROC glGetFloatv;
-extern PFNGLDELETETEXTURESPROC glDeleteTextures;
-extern PFNGLGENTEXTURESPROC glGenTextures;
-extern PFNGLTEXPARAMETERFPROC glTexParameterf;
-extern PFNGLACTIVETEXTUREPROC glActiveTexture;
-extern PFNGLBLENDCOLORPROC glBlendColor;
-extern PFNGLREADBUFFERPROC glReadBuffer;
+extern PFNGLBLENDFUNCPROC g_glBlendFunc;
+extern PFNGLPIXELSTOREIPROC g_glPixelStorei;
+extern PFNGLCLEARCOLORPROC g_glClearColor;
+extern PFNGLCULLFACEPROC g_glCullFace;
+extern PFNGLDEPTHFUNCPROC g_glDepthFunc;
+extern PFNGLDEPTHMASKPROC g_glDepthMask;
+extern PFNGLDISABLEPROC g_glDisable;
+extern PFNGLENABLEPROC g_glEnable;
+extern PFNGLPOLYGONOFFSETPROC g_glPolygonOffset;
+extern PFNGLSCISSORPROC g_glScissor;
+extern PFNGLVIEWPORTPROC g_glViewport;
+extern PFNGLBINDTEXTUREPROC g_glBindTexture;
+extern PFNGLTEXIMAGE2DPROC g_glTexImage2D;
+extern PFNGLTEXPARAMETERIPROC g_glTexParameteri;
+extern PFNGLGETINTEGERVPROC g_glGetIntegerv;
+extern PFNGLGETSTRINGPROC g_glGetString;
+extern PFNGLREADPIXELSPROC g_glReadPixels;
+extern PFNGLTEXSUBIMAGE2DPROC g_glTexSubImage2D;
+extern PFNGLDRAWARRAYSPROC g_glDrawArrays;
+extern PFNGLGETERRORPROC g_glGetError;
+extern PFNGLDRAWELEMENTSPROC g_glDrawElements;
+extern PFNGLLINEWIDTHPROC g_glLineWidth;
+extern PFNGLCLEARPROC g_glClear;
+extern PFNGLGETFLOATVPROC g_glGetFloatv;
+extern PFNGLDELETETEXTURESPROC g_glDeleteTextures;
+extern PFNGLGENTEXTURESPROC g_glGenTextures;
+extern PFNGLTEXPARAMETERFPROC g_glTexParameterf;
+extern PFNGLACTIVETEXTUREPROC g_glActiveTexture;
+extern PFNGLBLENDCOLORPROC g_glBlendColor;
+extern PFNGLREADBUFFERPROC g_glReadBuffer;
 #endif
 
 #ifdef OS_WINDOWS
-extern PFNGLACTIVETEXTUREPROC glActiveTexture;
-extern PFNGLBLENDCOLORPROC glBlendColor;
+#define glActiveTexture g_glActiveTexture
+#define glBlendColor g_glBlendColor
+
+extern PFNGLACTIVETEXTUREPROC g_glActiveTexture;
+extern PFNGLBLENDCOLORPROC g_glBlendColor;
 #endif
 
-extern PFNGLCREATESHADERPROC glCreateShader;
-extern PFNGLCOMPILESHADERPROC glCompileShader;
-extern PFNGLSHADERSOURCEPROC glShaderSource;
-extern PFNGLCREATEPROGRAMPROC glCreateProgram;
-extern PFNGLATTACHSHADERPROC glAttachShader;
-extern PFNGLLINKPROGRAMPROC glLinkProgram;
-extern PFNGLUSEPROGRAMPROC glUseProgram;
-extern PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation;
-extern PFNGLUNIFORM1IPROC glUniform1i;
-extern PFNGLUNIFORM1FPROC glUniform1f;
-extern PFNGLUNIFORM2FPROC glUniform2f;
-extern PFNGLUNIFORM2IPROC glUniform2i;
-extern PFNGLUNIFORM4IPROC glUniform4i;
+#define glCreateShader g_glCreateShader
+#define glCompileShader g_glCompileShader
+#define glShaderSource g_glShaderSource
+#define glCreateProgram g_glCreateProgram
+#define glAttachShader g_glAttachShader
+#define glLinkProgram g_glLinkProgram
+#define glUseProgram g_glUseProgram
+#define glGetUniformLocation g_glGetUniformLocation
+#define glUniform1i g_glUniform1i
+#define glUniform1f g_glUniform1f
+#define glUniform2f g_glUniform2f
+#define glUniform2i g_glUniform2i
+#define glUniform4i  g_glUniform4i
 
-extern PFNGLUNIFORM4FPROC glUniform4f;
-extern PFNGLUNIFORM3FVPROC glUniform3fv;
-extern PFNGLUNIFORM4FVPROC glUniform4fv;
-extern PFNGLDETACHSHADERPROC glDetachShader;
-extern PFNGLDELETESHADERPROC glDeleteShader;
-extern PFNGLDELETEPROGRAMPROC glDeleteProgram;
-extern PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
-extern PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog;
-extern PFNGLGETSHADERIVPROC glGetShaderiv;
-extern PFNGLGETPROGRAMIVPROC glGetProgramiv;
+#define glUniform4f g_glUniform4f
+#define glUniform3fv g_glUniform3fv
+#define glUniform4fv g_glUniform4fv
+#define glDetachShader g_glDetachShader
+#define glDeleteShader g_glDeleteShader
+#define glDeleteProgram g_glDeleteProgram
+#define glGetProgramInfoLog g_glGetProgramInfoLog
+#define glGetShaderInfoLog g_glGetShaderInfoLog
+#define glGetShaderiv g_glGetShaderiv
+#define glGetProgramiv g_glGetProgramiv
 
-extern PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
-extern PFNGLDISABLEVERTEXATTRIBARRAYPROC glDisableVertexAttribArray;
-extern PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;
-extern PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation;
-extern PFNGLVERTEXATTRIB4FPROC glVertexAttrib4f;
-extern PFNGLVERTEXATTRIB4FVPROC glVertexAttrib4fv;
+#define glEnableVertexAttribArray g_glEnableVertexAttribArray
+#define glDisableVertexAttribArray g_glDisableVertexAttribArray
+#define glVertexAttribPointer g_glVertexAttribPointer
+#define glBindAttribLocation g_glBindAttribLocation
+#define glVertexAttrib4f g_glVertexAttrib4f
+#define glVertexAttrib4fv g_glVertexAttrib4fv
 
-extern PFNGLDEPTHRANGEFPROC glDepthRangef;
-extern PFNGLCLEARDEPTHFPROC glClearDepthf;
+#define glDepthRangef g_glDepthRangef
+#define glClearDepthf g_glClearDepthf
 
-extern PFNGLDRAWBUFFERSPROC glDrawBuffers;
-extern PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
-extern PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
-extern PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
-extern PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
-extern PFNGLTEXIMAGE2DMULTISAMPLEPROC glTexImage2DMultisample;
-extern PFNGLTEXSTORAGE2DMULTISAMPLEPROC glTexStorage2DMultisample;
-extern PFNGLGENRENDERBUFFERSPROC glGenRenderbuffers;
-extern PFNGLBINDRENDERBUFFERPROC glBindRenderbuffer;
-extern PFNGLRENDERBUFFERSTORAGEPROC glRenderbufferStorage;
-extern PFNGLDELETERENDERBUFFERSPROC glDeleteRenderbuffers;
-extern PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
-extern PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
-extern PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer;
-extern PFNGLGENBUFFERSPROC glGenBuffers;
-extern PFNGLBINDBUFFERPROC glBindBuffer;
-extern PFNGLBUFFERDATAPROC glBufferData;
-extern PFNGLMAPBUFFERPROC glMapBuffer;
-extern PFNGLMAPBUFFERRANGEPROC glMapBufferRange;
-extern PFNGLUNMAPBUFFERPROC glUnmapBuffer;
-extern PFNGLDELETEBUFFERSPROC glDeleteBuffers;
-extern PFNGLBINDIMAGETEXTUREPROC glBindImageTexture;
-extern PFNGLMEMORYBARRIERPROC glMemoryBarrier;
-extern PFNGLGETSTRINGIPROC glGetStringi;
-extern PFNGLINVALIDATEFRAMEBUFFERPROC glInvalidateFramebuffer;
-extern PFNGLBUFFERSTORAGEPROC glBufferStorage;
-extern PFNGLFENCESYNCPROC glFenceSync;
-extern PFNGLCLIENTWAITSYNCPROC glClientWaitSync;
-extern PFNGLDELETESYNCPROC glDeleteSync;
+#define glDrawBuffers g_glDrawBuffers
+#define glGenFramebuffers g_glGenFramebuffers
+#define glBindFramebuffer g_glBindFramebuffer
+#define glDeleteFramebuffers g_glDeleteFramebuffers
+#define glFramebufferTexture2D g_glFramebufferTexture2D
+#define glTexImage2DMultisample g_glTexImage2DMultisample
+#define glTexStorage2DMultisample g_glTexStorage2DMultisample
+#define glGenRenderbuffers g_glGenRenderbuffers
+#define glBindRenderbuffer g_glBindRenderbuffer
+#define glRenderbufferStorage g_glRenderbufferStorage
+#define glDeleteRenderbuffers g_glDeleteRenderbuffers
+#define glFramebufferRenderbuffer g_glFramebufferRenderbuffer
+#define glCheckFramebufferStatus g_glCheckFramebufferStatus
+#define glBlitFramebuffer g_glBlitFramebuffer
+#define glGenBuffers g_glGenBuffers
+#define glBindBuffer g_glBindBuffer
+#define glBufferData g_glBufferData
+#define glMapBuffer g_glMapBuffer
+#define glMapBufferRange g_glMapBufferRange
+#define glUnmapBuffer g_glUnmapBuffer
+#define glDeleteBuffers g_glDeleteBuffers
+#define glBindImageTexture g_glBindImageTexture
+#define glMemoryBarrier g_glMemoryBarrier
+#define glGetStringi g_glGetStringi
+#define glInvalidateFramebuffer g_glInvalidateFramebuffer
+#define glBufferStorage g_glBufferStorage
+#define glFenceSync g_glFenceSync
+#define glClientWaitSync g_glClientWaitSync
+#define glDeleteSync g_glDeleteSync
 
-extern PFNGLGETUNIFORMBLOCKINDEXPROC glGetUniformBlockIndex;
-extern PFNGLUNIFORMBLOCKBINDINGPROC glUniformBlockBinding;
-extern PFNGLGETACTIVEUNIFORMBLOCKIVPROC glGetActiveUniformBlockiv;
-extern PFNGLGETUNIFORMINDICESPROC glGetUniformIndices;
-extern PFNGLGETACTIVEUNIFORMSIVPROC glGetActiveUniformsiv;
-extern PFNGLBINDBUFFERBASEPROC glBindBufferBase;
-extern PFNGLBUFFERSUBDATAPROC glBufferSubData;
+#define glGetUniformBlockIndex g_glGetUniformBlockIndex
+#define glUniformBlockBinding g_glUniformBlockBinding
+#define glGetActiveUniformBlockiv g_glGetActiveUniformBlockiv
+#define glGetUniformIndices g_glGetUniformIndices
+#define glGetActiveUniformsiv g_glGetActiveUniformsiv
+#define glBindBufferBase g_glBindBufferBase
+#define glBufferSubData g_glBufferSubData
 
-extern PFNGLGETPROGRAMBINARYPROC glGetProgramBinary;
-extern PFNGLPROGRAMBINARYPROC glProgramBinary;
-extern PFNGLPROGRAMPARAMETERIPROC glProgramParameteri;
+#define glGetProgramBinary g_glGetProgramBinary
+#define glProgramBinary g_glProgramBinary
+#define glProgramParameteri g_glProgramParameteri
 
-extern PFNGLTEXSTORAGE2DPROC glTexStorage2D;
-extern PFNGLTEXTURESTORAGE2DPROC glTextureStorage2D;
-extern PFNGLTEXTURESUBIMAGE2DPROC glTextureSubImage2D;
-extern PFNGLTEXTURESTORAGE2DMULTISAMPLEEXTPROC glTextureStorage2DMultisample;
-extern PFNGLTEXTUREPARAMETERIPROC glTextureParameteri;
-extern PFNGLTEXTUREPARAMETERFPROC glTextureParameterf;
-extern PFNGLCREATETEXTURESPROC glCreateTextures;
-extern PFNGLCREATEBUFFERSPROC glCreateBuffers;
-extern PFNGLCREATEFRAMEBUFFERSPROC glCreateFramebuffers;
-extern PFNGLNAMEDFRAMEBUFFERTEXTUREPROC glNamedFramebufferTexture;
+#define glTexStorage2D g_glTexStorage2D
+#define glTextureStorage2D g_glTextureStorage2D
+#define glTextureSubImage2D g_glTextureSubImage2D
+#define glTextureStorage2DMultisample g_glTextureStorage2DMultisample
+#define glTextureParameteri g_glTextureParameteri
+#define glTextureParameterf g_glTextureParameterf
+#define glCreateTextures g_glCreateTextures
+#define glCreateBuffers g_glCreateBuffers
+#define glCreateFramebuffers g_glCreateFramebuffers
+#define glNamedFramebufferTexture g_glNamedFramebufferTexture
+
+extern PFNGLCREATESHADERPROC g_glCreateShader;
+extern PFNGLCOMPILESHADERPROC g_glCompileShader;
+extern PFNGLSHADERSOURCEPROC g_glShaderSource;
+extern PFNGLCREATEPROGRAMPROC g_glCreateProgram;
+extern PFNGLATTACHSHADERPROC g_glAttachShader;
+extern PFNGLLINKPROGRAMPROC g_glLinkProgram;
+extern PFNGLUSEPROGRAMPROC g_glUseProgram;
+extern PFNGLGETUNIFORMLOCATIONPROC g_glGetUniformLocation;
+extern PFNGLUNIFORM1IPROC g_glUniform1i;
+extern PFNGLUNIFORM1FPROC g_glUniform1f;
+extern PFNGLUNIFORM2FPROC g_glUniform2f;
+extern PFNGLUNIFORM2IPROC g_glUniform2i;
+extern PFNGLUNIFORM4IPROC g_glUniform4i;
+
+extern PFNGLUNIFORM4FPROC g_glUniform4f;
+extern PFNGLUNIFORM3FVPROC g_glUniform3fv;
+extern PFNGLUNIFORM4FVPROC g_glUniform4fv;
+extern PFNGLDETACHSHADERPROC g_glDetachShader;
+extern PFNGLDELETESHADERPROC g_glDeleteShader;
+extern PFNGLDELETEPROGRAMPROC g_glDeleteProgram;
+extern PFNGLGETPROGRAMINFOLOGPROC g_glGetProgramInfoLog;
+extern PFNGLGETSHADERINFOLOGPROC g_glGetShaderInfoLog;
+extern PFNGLGETSHADERIVPROC g_glGetShaderiv;
+extern PFNGLGETPROGRAMIVPROC g_glGetProgramiv;
+
+extern PFNGLENABLEVERTEXATTRIBARRAYPROC g_glEnableVertexAttribArray;
+extern PFNGLDISABLEVERTEXATTRIBARRAYPROC g_glDisableVertexAttribArray;
+extern PFNGLVERTEXATTRIBPOINTERPROC g_glVertexAttribPointer;
+extern PFNGLBINDATTRIBLOCATIONPROC g_glBindAttribLocation;
+extern PFNGLVERTEXATTRIB4FPROC g_glVertexAttrib4f;
+extern PFNGLVERTEXATTRIB4FVPROC g_glVertexAttrib4fv;
+
+extern PFNGLDEPTHRANGEFPROC g_glDepthRangef;
+extern PFNGLCLEARDEPTHFPROC g_glClearDepthf;
+
+extern PFNGLDRAWBUFFERSPROC g_glDrawBuffers;
+extern PFNGLGENFRAMEBUFFERSPROC g_glGenFramebuffers;
+extern PFNGLBINDFRAMEBUFFERPROC g_glBindFramebuffer;
+extern PFNGLDELETEFRAMEBUFFERSPROC g_glDeleteFramebuffers;
+extern PFNGLFRAMEBUFFERTEXTURE2DPROC g_glFramebufferTexture2D;
+extern PFNGLTEXIMAGE2DMULTISAMPLEPROC g_glTexImage2DMultisample;
+extern PFNGLTEXSTORAGE2DMULTISAMPLEPROC g_glTexStorage2DMultisample;
+extern PFNGLGENRENDERBUFFERSPROC g_glGenRenderbuffers;
+extern PFNGLBINDRENDERBUFFERPROC g_glBindRenderbuffer;
+extern PFNGLRENDERBUFFERSTORAGEPROC g_glRenderbufferStorage;
+extern PFNGLDELETERENDERBUFFERSPROC g_glDeleteRenderbuffers;
+extern PFNGLFRAMEBUFFERRENDERBUFFERPROC g_glFramebufferRenderbuffer;
+extern PFNGLCHECKFRAMEBUFFERSTATUSPROC g_glCheckFramebufferStatus;
+extern PFNGLBLITFRAMEBUFFERPROC g_glBlitFramebuffer;
+extern PFNGLGENBUFFERSPROC g_glGenBuffers;
+extern PFNGLBINDBUFFERPROC g_glBindBuffer;
+extern PFNGLBUFFERDATAPROC g_glBufferData;
+extern PFNGLMAPBUFFERPROC g_glMapBuffer;
+extern PFNGLMAPBUFFERRANGEPROC g_glMapBufferRange;
+extern PFNGLUNMAPBUFFERPROC g_glUnmapBuffer;
+extern PFNGLDELETEBUFFERSPROC g_glDeleteBuffers;
+extern PFNGLBINDIMAGETEXTUREPROC g_glBindImageTexture;
+extern PFNGLMEMORYBARRIERPROC g_glMemoryBarrier;
+extern PFNGLGETSTRINGIPROC g_glGetStringi;
+extern PFNGLINVALIDATEFRAMEBUFFERPROC g_glInvalidateFramebuffer;
+extern PFNGLBUFFERSTORAGEPROC g_glBufferStorage;
+extern PFNGLFENCESYNCPROC g_glFenceSync;
+extern PFNGLCLIENTWAITSYNCPROC g_glClientWaitSync;
+extern PFNGLDELETESYNCPROC g_glDeleteSync;
+
+extern PFNGLGETUNIFORMBLOCKINDEXPROC g_glGetUniformBlockIndex;
+extern PFNGLUNIFORMBLOCKBINDINGPROC g_glUniformBlockBinding;
+extern PFNGLGETACTIVEUNIFORMBLOCKIVPROC g_glGetActiveUniformBlockiv;
+extern PFNGLGETUNIFORMINDICESPROC g_glGetUniformIndices;
+extern PFNGLGETACTIVEUNIFORMSIVPROC g_glGetActiveUniformsiv;
+extern PFNGLBINDBUFFERBASEPROC g_glBindBufferBase;
+extern PFNGLBUFFERSUBDATAPROC g_glBufferSubData;
+
+extern PFNGLGETPROGRAMBINARYPROC g_glGetProgramBinary;
+extern PFNGLPROGRAMBINARYPROC g_glProgramBinary;
+extern PFNGLPROGRAMPARAMETERIPROC g_glProgramParameteri;
+
+extern PFNGLTEXSTORAGE2DPROC g_glTexStorage2D;
+extern PFNGLTEXTURESTORAGE2DPROC g_glTextureStorage2D;
+extern PFNGLTEXTURESUBIMAGE2DPROC g_glTextureSubImage2D;
+extern PFNGLTEXTURESTORAGE2DMULTISAMPLEEXTPROC g_glTextureStorage2DMultisample;
+extern PFNGLTEXTUREPARAMETERIPROC g_glTextureParameteri;
+extern PFNGLTEXTUREPARAMETERFPROC g_glTextureParameterf;
+extern PFNGLCREATETEXTURESPROC g_glCreateTextures;
+extern PFNGLCREATEBUFFERSPROC g_glCreateBuffers;
+extern PFNGLCREATEFRAMEBUFFERSPROC g_glCreateFramebuffers;
+extern PFNGLNAMEDFRAMEBUFFERTEXTUREPROC g_glNamedFramebufferTexture;
 
 void initGLFunctions();