diff --git a/appframework/glmdisplaydb_linuxwin.inl b/appframework/glmdisplaydb_linuxwin.inl
index 3e1d76a8..ae52a34c 100644
--- a/appframework/glmdisplaydb_linuxwin.inl
+++ b/appframework/glmdisplaydb_linuxwin.inl
@@ -45,7 +45,7 @@ void GLMRendererInfo::Init( GLMRendererInfoFields *info )
 
         // If you haven't created a GL context by now (and initialized gGL), you're about to crash.
 
-        m_info.m_hasMixedAttachmentSizes = gGL->m_bHave_GL_ARB_framebuffer_object;
+        m_info.m_hasMixedAttachmentSizes = gGL->m_bHave_GL_EXT_framebuffer_object;
         m_info.m_hasBGRA = gGL->m_bHave_GL_EXT_vertex_array_bgra;
 
         // !!! FIXME: what do these do on the Mac?
@@ -64,8 +64,15 @@ void GLMRendererInfo::Init( GLMRendererInfoFields *info )
                 m_info.m_hasNativeClipVertexMode = true;
         }
         
+#ifdef TOGLES
+        m_info.m_hasOcclusionQuery = true;
+        m_info.m_hasFramebufferBlit = true;
+        m_info.m_hasUniformBuffers = true;
+#else
         m_info.m_hasOcclusionQuery = gGL->m_bHave_GL_ARB_occlusion_query;
         m_info.m_hasFramebufferBlit = gGL->m_bHave_GL_EXT_framebuffer_blit || gGL->m_bHave_GL_ARB_framebuffer_object;
+        m_info.m_hasUniformBuffers =  gGL->m_bHave_GL_ARB_uniform_buffer;
+#endif
 
         GLint nMaxAniso = 0;
         gGL->glGetIntegerv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &nMaxAniso );
@@ -88,8 +95,7 @@ void GLMRendererInfo::Init( GLMRendererInfoFields *info )
                         m_info.m_hasBindableUniforms = false;
                 }
         }
-                
-        m_info.m_hasUniformBuffers =  gGL->m_bHave_GL_ARB_uniform_buffer;
+
         m_info.m_hasPerfPackage1 = true;  // this flag is Mac-specific. We do slower things if you don't have Mac OS X 10.x.y or later. Linux always does the fast path!
 
         //-------------------------------------------------------------------
diff --git a/engine/sys_mainwind.cpp b/engine/sys_mainwind.cpp
index 1c6ab777..ce46f8c8 100644
--- a/engine/sys_mainwind.cpp
+++ b/engine/sys_mainwind.cpp
@@ -915,7 +915,11 @@ bool CGame::CreateGameWindow( void )
 
 	if ( IsOpenGL() )
 	{
+#ifdef TOGLES
+		V_strcat( windowName, " - OpenGLES", sizeof( windowName ) );
+#else
 		V_strcat( windowName, " - OpenGL", sizeof( windowName ) );
+#endif
 	}
 
 #if PIX_ENABLE || defined( PIX_INSTRUMENTATION )
diff --git a/public/appframework/ilaunchermgr.h b/public/appframework/ilaunchermgr.h
index 4b433ad8..bafa67cb 100644
--- a/public/appframework/ilaunchermgr.h
+++ b/public/appframework/ilaunchermgr.h
@@ -16,6 +16,7 @@
 #include "appframework/IAppSystem.h"
 
 #if defined( DX_TO_GL_ABSTRACTION )
+
 #include "togl/linuxwin/glmgrbasics.h"
 #include "togl/linuxwin/glmdisplay.h"
 
diff --git a/public/togl/rendermechanism.h b/public/togl/rendermechanism.h
index 47be332d..374ccaa9 100644
--- a/public/togl/rendermechanism.h
+++ b/public/togl/rendermechanism.h
@@ -22,6 +22,11 @@
 //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 //  THE SOFTWARE.
 //
+
+#ifdef TOGLES
+#include "togles/rendermechanism.h"
+#else
+
 #ifndef RENDERMECHANISM_H
 #define RENDERMECHANISM_H
 
@@ -71,3 +76,5 @@
 #endif // defined(DX_TO_GL_ABSTRACTION)
 
 #endif // RENDERMECHANISM_H
+
+#endif
diff --git a/public/togles/linuxwin/glfuncs.h b/public/togles/linuxwin/glfuncs.h
index 5606f105..e55c8f19 100644
--- a/public/togles/linuxwin/glfuncs.h
+++ b/public/togles/linuxwin/glfuncs.h
@@ -28,7 +28,6 @@ GL_FUNC(OpenGL,true,GLenum,glGetError,(void),())
 GL_FUNC_VOID(OpenGL,true,glActiveTexture,(GLenum a),(a))
 GL_FUNC_VOID(OpenGL,true,glAlphaFunc,(GLenum a,GLclampf b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glAttachShader,(GLuint a, GLuint b),(a,b))
-GL_FUNC_VOID(OpenGL,true,glBegin,(GLenum a),(a))
 GL_FUNC_VOID(OpenGL,true,glBindAttribLocation,(GLuint a,GLuint b,const GLchar *c),(a,b,c))
 GL_FUNC_VOID(OpenGL,true,glBindBuffer,(GLenum a,GLuint b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glBindProgram,(GLenum a,GLuint b),(a,b))
@@ -73,7 +72,6 @@ GL_FUNC_VOID(OpenGL,true,glDrawRangeElementsBaseVertex,(GLenum a,GLuint b,GLuint
 #endif
 GL_FUNC_VOID(OpenGL,true,glEnable,(GLenum a),(a))
 GL_FUNC_VOID(OpenGL,true,glEnableVertexAttribArray,(GLuint a),(a))
-GL_FUNC_VOID(OpenGL,true,glEnd,(void),())
 GL_FUNC_VOID(OpenGL,true,glFinish,(void),())
 GL_FUNC_VOID(OpenGL,true,glFlush,(void),())
 GL_FUNC_VOID(OpenGL,true,glFrontFace,(GLenum a),(a))
@@ -94,13 +92,11 @@ GL_FUNC(OpenGL,true,GLint,glGetUniformLocation,(GLuint a,const GLchar *b),(a,b))
 GL_FUNC(OpenGL,true,GLboolean,glIsEnabled,(GLenum a),(a))
 GL_FUNC(OpenGL,true,GLboolean,glIsTexture,(GLuint a),(a))
 GL_FUNC_VOID(OpenGL,true,glLinkProgram,(GLuint a),(a))
-//GL_FUNC(OpenGL,true,GLvoid*,glMapBufferARB,(GLenum a,GLenum b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glOrtho,(GLdouble a,GLdouble b,GLdouble c,GLdouble d,GLdouble e,GLdouble f),(a,b,c,d,e,f))
 GL_FUNC_VOID(OpenGL,true,glPixelStorei,(GLenum a,GLint b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glPolygonMode,(GLenum a,GLenum b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glPolygonOffset,(GLfloat a,GLfloat b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glPopAttrib,(void),())
-//GL_FUNC_VOID(OpenGL,true,glProgramStringARB,(GLenum a,GLenum b,GLsizei c,const GLvoid *d),(a,b,c,d))
 GL_FUNC_VOID(OpenGL,true,glPushAttrib,(GLbitfield a),(a))
 GL_FUNC_VOID(OpenGL,true,glReadBuffer,(GLenum a),(a))
 GL_FUNC_VOID(OpenGL,true,glScissor,(GLint a,GLint b,GLsizei c,GLsizei d),(a,b,c,d))
@@ -116,7 +112,6 @@ GL_FUNC_VOID(OpenGL,true,glTexParameteri,(GLenum a,GLenum b,GLint c),(a,b,c))
 GL_FUNC_VOID(OpenGL,true,glTexSubImage2D,(GLenum a,GLint b,GLint c,GLint d,GLsizei e,GLsizei f,GLenum g,GLenum h,const GLvoid *i),(a,b,c,d,e,f,g,h,i))
 GL_FUNC_VOID(OpenGL,true,glUniform1f,(GLint a,GLfloat b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glUniform1i,(GLint a,GLint b),(a,b))
-GL_FUNC_VOID(OpenGL,true,glUniform1iARB,(GLint a,GLint b),(a,b))
 GL_FUNC_VOID(OpenGL,true,glUniform4fv,(GLint a,GLsizei b,const GLfloat *c),(a,b,c))
 GL_FUNC(OpenGL,true,GLboolean,glUnmapBuffer,(GLenum a),(a))
 GL_FUNC_VOID(OpenGL,true,glUseProgram,(GLuint a),(a))
@@ -187,9 +182,6 @@ GL_FUNC_VOID(OpenGL,false,glFlushMappedBufferRange,(GLenum a,GLintptr b,GLsizeip
 GL_EXT(GL_ARB_vertex_buffer_object,-1,-1)
 GL_FUNC_VOID(OpenGL,true,glBufferSubData,(GLenum a,GLintptr b,GLsizeiptr c,const GLvoid *d),(a,b,c,d))
 GL_EXT(GL_ARB_occlusion_query,-1,-1)
-GL_FUNC_VOID(GL_ARB_occlusion_query,false,glBeginQueryARB,(GLenum a,GLuint b),(a,b))
-GL_FUNC_VOID(GL_ARB_occlusion_query,false,glEndQueryARB,(GLenum a),(a))
-GL_FUNC_VOID(GL_ARB_occlusion_query,false,glGetQueryObjectivARB,(GLuint a,GLenum b,GLint *c),(a,b,c))
 GL_FUNC_VOID(OpenGL,false,glGetQueryObjectuiv,(GLuint a,GLenum b,GLuint *c),(a,b,c))
 GL_EXT(GL_APPLE_texture_range,-1,-1)
 GL_FUNC_VOID(GL_APPLE_texture_range,false,glTextureRangeAPPLE,(GLenum a,GLsizei b,void *c),(a,b,c))
diff --git a/togles/linuxwin/cglmtex.cpp b/togles/linuxwin/cglmtex.cpp
index 3dc3ef04..0ce6a030 100644
--- a/togles/linuxwin/cglmtex.cpp
+++ b/togles/linuxwin/cglmtex.cpp
@@ -891,9 +891,6 @@ CGLMTex::CGLMTex( GLMContext *ctx, GLMTexLayout *layout, uint levels, const char
 		{
 			printf("\n minimizing storage for tex '%s' [%s] ", m_debugLabel?m_debugLabel:"-", m_layout->m_layoutSummary );
 		}
-		
-		if (gGL->m_bHave_GL_APPLE_texture_range)
-			gGL->glTexParameteri( m_layout->m_key.m_texGLTarget, GL_TEXTURE_MINIMIZE_STORAGE_APPLE, 1 );
 	}
 
 	// after a lot of pain with texture completeness...
@@ -1359,10 +1356,6 @@ void CGLMTex::WriteTexels( GLMTexLockDesc *desc, bool writeWholeSlice, bool noDa
 	// set up the client storage now, one way or another
 	// If this extension isn't supported, we just end up with two copies of the texture, one in the GL and one in app memory.
 	//  So it's safe to just go on as if this extension existed and hold the possibly-unnecessary extra RAM.
-	if (gGL->m_bHave_GL_APPLE_client_storage)
-	{
-		gGL->glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, m_texClientStorage );
-	}
 
 	switch( target )
 	{
@@ -1509,11 +1502,6 @@ void CGLMTex::WriteTexels( GLMTexLockDesc *desc, bool writeWholeSlice, bool noDa
 		break;
 	}
 
-	if (gGL->m_bHave_GL_APPLE_client_storage)
-	{
-		gGL->glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_FALSE );
-	}
-
 	if ( expandTemp )
 	{
 		free( expandTemp );
diff --git a/togles/linuxwin/glentrypoints.cpp b/togles/linuxwin/glentrypoints.cpp
index 64fe576e..fc9fcfe2 100644
--- a/togles/linuxwin/glentrypoints.cpp
+++ b/togles/linuxwin/glentrypoints.cpp
@@ -379,18 +379,6 @@ COpenGLEntryPoints::COpenGLEntryPoints()
 	// !!! FIXME:  hint Apple's drivers and not because we rely on the
 	// !!! FIXME:  functionality. If so, just remove this check (and the
 	// !!! FIXME:  GL_NV_fence code entirely).
-#ifndef ANDROID // HACK
- 	if ((m_bHave_OpenGL) && ((!m_bHave_GL_NV_fence) && (!m_bHave_GL_ARB_sync) && (!m_bHave_GL_APPLE_fence)))
- 	{
- 	//	Error( "Required OpenGL extension \"GL_NV_fence\", \"GL_ARB_sync\", or \"GL_APPLE_fence\" is not supported. Please upgrade your OpenGL driver." );
- 	}
-#endif
-
-	// same extension, different name.
-	if (m_bHave_GL_EXT_vertex_array_bgra || m_bHave_GL_ARB_vertex_array_bgra)
-	{
-		m_bHave_GL_EXT_vertex_array_bgra = m_bHave_GL_ARB_vertex_array_bgra = true;
-	}
 
 	// GL_ARB_framebuffer_object is a superset of GL_EXT_framebuffer_object,
 	//  (etc) but if you don't call in through the ARB entry points, you won't
@@ -400,6 +388,7 @@ COpenGLEntryPoints::COpenGLEntryPoints()
 		m_bHave_GL_EXT_framebuffer_object = true;
 		m_bHave_GL_EXT_framebuffer_blit = true;
 		m_bHave_GL_EXT_framebuffer_multisample = true;
+		m_bHave_GL_ARB_occlusion_query = true;
 
 		glBindFramebuffer.Force(glBindFramebuffer.Pointer());
 		glBindRenderbuffer.Force(glBindRenderbuffer.Pointer());
diff --git a/togles/linuxwin/glmgr.cpp b/togles/linuxwin/glmgr.cpp
index f2aee138..ec888347 100644
--- a/togles/linuxwin/glmgr.cpp
+++ b/togles/linuxwin/glmgr.cpp
@@ -1456,22 +1456,22 @@ void GLMContext::BlitTex( CGLMTex *srcTex, GLMRect *srcRect, int srcFace, int sr
 
 		// immediate mode is fine
 
-		float topv = 1.0;
-		float botv = 0.0;
-		
-		gGL->glBegin(GL_QUADS);
-			gGL->glTexCoord2f	( 0.0, botv );
-			gGL->glVertex3f		( -1.0, -1.0, 0.0 );
-			
-			gGL->glTexCoord2f	( 1.0, botv );
-			gGL->glVertex3f		( 1.0, -1.0, 0.0 );
-			
-			gGL->glTexCoord2f	( 1.0, topv );
-			gGL->glVertex3f		( 1.0, 1.0, 0.0 );
+		const float topv = 1.0;
+		const float botv = 0.0;
 
-			gGL->glTexCoord2f	( 0.0, topv );
-			gGL->glVertex3f		( -1.0, 1.0, 0.0 );
-		gGL->glEnd();
+		const float verts[] = {-1.f, -1.f, 1.f, -1.f, 1.f, 1.f, -1.f, 1.f};
+		const float verts_tex[] = {0.f, botv, 1.f, botv, 1.f, topv, 0.f, topv};
+
+		gGL->glEnableClientState(GL_VERTEX_ARRAY);
+		gGL->glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+		gGL->glVertexPointer(2, GL_FLOAT, 0, verts);
+		gGL->glTexCoordPointer(2, GL_FLOAT, 0, verts_tex);
+
+		glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+		gGL->glDisableClientState(GL_VERTEX_ARRAY);
+		gGL->glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 
 		gGL->glBindTexture( GL_TEXTURE_2D, 0 );