allow custom opengl loader

src/render/Renderer.cpp

@@ -5,9 +5,6 @@
  *      Author: simon
  */
 
-#ifndef ANDROID
-#include <glbinding/Binding.h>
-#endif
 #include "render/Renderer.h"
 #include "render/GL.h"
 #include <stdio.h>
@@ -43,8 +40,16 @@ void Renderer::InitShaders() {
 }
 
 bool Renderer::Init() {
-#ifndef ANDROID
-    glbinding::Binding::initialize();
+#if __has_include(<glbinding/glbinding.h>)
+    glbinding::initialize();
+#elif __has_include(<GL/glew.h>)
+	glewInit();
+#elif __has_include(<glad/glad.h>)
+	gladLoadGL();
+#elif __has_include(<GL/gl3w.h>)
+	gl3wInit();
+#elif __has_include(<glbinding/Binding.h>)
+	glbinding::Binding::initialize();
 #endif
     glEnable(GL_TEXTURE_2D);
     glEnable(GL_BLEND);