add gl.h

libcygnet/include/cygnet/gl.h

@@ -0,0 +1 @@
+#include <SDL_opengles2.h>

libcygnet/src/GlWrappers.cc

@@ -1,8 +1,8 @@
 #include "GlWrappers.h"
 
-#include <SDL_opengles2.h>
 #include <iostream>
 
+#include "gl.h"
 #include "util.h"
 
 namespace Cygnet {

libcygnet/src/Renderer.cc

@@ -2,7 +2,6 @@
 
 #include <iostream>
 #include <stdio.h>
-#include <SDL_opengles2.h>
 #include <swan-common/constants.h>
 #include <string.h>
 
@@ -10,6 +9,7 @@
 #include <type_traits>
 #include <bit>
 
+#include "gl.h"
 #include "shaders.h"
 #include "GlWrappers.h"
 #include "TileAtlas.h"

libcygnet/src/TileAtlas.cc

@@ -3,11 +3,12 @@
 #include <iostream>
 #include <vector>
 #include <algorithm>
-#include <SDL_opengles2.h>
 #include <stdio.h>
 #include <string.h>
 #include <swan-common/constants.h>
 
+#include "gl.h"
+
 namespace Cygnet {
 
 struct AtlasState {

libcygnet/src/Window.cc

@@ -1,8 +1,8 @@
 #include "Window.h"
 
 #include <SDL.h>
-#include <SDL_opengles2.h>
 
+#include "gl.h"
 #include "util.h"
 
 namespace Cygnet {

libcygnet/src/util.cc

@@ -1,7 +1,8 @@
 #include "util.h"
 
 #include <SDL.h>
-#include <SDL_opengles2.h>
+
+#include "gl.h"
 
 namespace Cygnet {