[GLExtensions] Remove a bunch of unneeded headers. Fix Linux+EGL compiling. Move include to glx.h around to work around it including global GL/gl.h

CMakeLists.txt

@@ -352,10 +352,6 @@ if(NOT ANDROID)
 
 	if(NOT USE_GLES3)
 		include(FindOpenGL)
-		include_directories(${OPENGL_INCLUDE_DIR})
-		add_definitions(-DGLEW_NO_GLU)
-	else()
-		set(X11_FOUND 1)
 	endif()
 	
 	include(FindALSA OPTIONAL)

Source/Core/DolphinWX/Android/ButtonManager.cpp

@@ -19,8 +19,6 @@
 #include "GLInterface.h"
 #include "Android/ButtonManager.h"
 
-extern void DrawButton(GLuint tex, float *coords);
-
 namespace ButtonManager
 {
 	// Pair key is padID, BUTTONTYPE

Source/Core/DolphinWX/GLInterface.h

@@ -10,12 +10,7 @@
 #else
 
 #include "Thread.h"
-#ifdef ANDROID
-#include <GLES2/gl2.h>
-#include <GLES2/gl2ext.h>
-#include <EGL/egl.h>
-#include "GLInterface/EGL.h"
-#elif defined(USE_EGL) && USE_EGL
+#if defined(USE_EGL) && USE_EGL
 #include "GLInterface/EGL.h"
 #elif defined(__APPLE__)
 #include "GLInterface/AGL.h"
@@ -23,10 +18,12 @@
 #include "GLInterface/WGL.h"
 #elif defined(HAVE_X11) && HAVE_X11
 #include "GLInterface/GLX.h"
+#include <GL/glx.h>
 #else
 #error Platform doesnt have a GLInterface
 #endif
 
+
 typedef struct {
 #if defined(USE_EGL) && USE_EGL // This is currently a X11/EGL implementation for desktop
 	int screen;

Source/Core/DolphinWX/GLInterface/EGL.h

@@ -17,13 +17,7 @@
 #ifndef _INTERFACEEGL_H_
 #define _INTERFACEEGL_H_
 
-#if USE_GLES
-#include <GL/gl.h>
-#else
-#include <GL/glxew.h>
-#include <GL/gl.h>
-#endif
-
+#include <EGL/egl.h>
 #include "InterfaceBase.h"
 
 class cPlatform;

Source/Core/DolphinWX/GLInterface/GLX.h

@@ -17,11 +17,6 @@
 #ifndef _INTERFACEGLX_H_
 #define _INTERFACEGLX_H_
 
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <X11/Xlib.h>
-#include <X11/keysym.h>
-
 #include "X11_Util.h"
 #include "InterfaceBase.h"
 

Source/Core/DolphinWX/GLInterface/X11_Util.cpp

@@ -69,12 +69,6 @@ bool cXInterface::Initialize(void *config)
 	if (GLWin.parent == 0)
 		GLWin.parent = RootWindow(GLWin.dpy, GLWin.screen);
 
-	/* Set initial projection/viewing transformation.
-	 * We can't be sure we'll get a ConfigureNotify event when the window
-	 * first appears.
-	 */
-	glViewport(0, 0, (GLint) GLWin.width, (GLint) GLWin.height);
-
 	return true;
 }