From ff904fc51ef2476600f18c088e8a0b0616752057 Mon Sep 17 00:00:00 2001
From: Joe Mattiello <mail@joemattiello.com>
Date: Fri, 30 Mar 2018 08:23:55 -0400
Subject: [PATCH] Add the iOS framebuffer binder from @braindx

---
 .../OpenGLContext/opengl_CachedFunctions.h    | 27 ++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/Graphics/OpenGLContext/opengl_CachedFunctions.h b/src/Graphics/OpenGLContext/opengl_CachedFunctions.h
index 605f13a7..5b929d11 100644
--- a/src/Graphics/OpenGLContext/opengl_CachedFunctions.h
+++ b/src/Graphics/OpenGLContext/opengl_CachedFunctions.h
@@ -125,7 +125,32 @@ namespace opengl {
 		Bind m_bind;
 	};
 
-	typedef CachedBind<decltype(GET_GL_FUNCTION(glBindFramebuffer))> CachedBindFramebuffer;
+	class CachedBindFramebuffer : public Cached2<graphics::Parameter, graphics::ObjectHandle>
+	{
+	public:
+		CachedBindFramebuffer(decltype(GET_GL_FUNCTION(glBindFramebuffer)) _bind) : m_bind(_bind) {}
+
+		void bind(graphics::Parameter _target, graphics::ObjectHandle _name) {
+#ifdef OS_IOS
+			if (m_defaultFramebuffer == graphics::ObjectHandle::null) {
+				GLint defaultFramebuffer;
+				glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFramebuffer);
+				m_defaultFramebuffer = graphics::ObjectHandle(defaultFramebuffer);
+			}
+			if (_name == graphics::ObjectHandle::null) {
+				_name = m_defaultFramebuffer;
+			}
+#endif
+			if (update(_target, _name))
+				m_bind(GLenum(_target), GLuint(_name));
+		}
+
+	private:
+		decltype(GET_GL_FUNCTION(glBindFramebuffer)) m_bind;
+#ifdef OS_IOS
+		graphics::ObjectHandle m_defaultFramebuffer;
+#endif
+	};
 
 	typedef CachedBind<decltype(GET_GL_FUNCTION(glBindRenderbuffer))> CachedBindRenderbuffer;