Refactor folder (#10475)

Move many third-party components' source codes from the src folder to a new folder called deps_src. The goal is to make the code structure clearer and easier to navigate.

deps_src/libigl/igl/opengl2/print_gl_get.h

@@ -0,0 +1,28 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_OPENGL2_PRINT_GL_GET_H
+#define IGL_OPENGL2_PRINT_GL_GET_H
+#include "gl.h"
+#include "../igl_inline.h"
+
+namespace igl
+{
+  namespace opengl2
+  {
+    // Prints the value of pname found by issuing glGet*(pname,*)
+    // Inputs:
+    //   pname  enum key to gl parameter
+    IGL_INLINE void print_gl_get(GLenum pname);
+  }
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "print_gl_get.cpp"
+#endif
+
+#endif