// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2014 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_TEXTURE_FROM_PNG_H
#define IGL_TEXTURE_FROM_PNG_H
#include "../igl_inline.h"
#include <string>
#include <Eigen/Core>

#ifndef IGL_NO_OPENGL
#include "../OpenGL_convenience.h"

namespace igl
{
  // Read an image from a .png file and use it as a texture
  //
  // Input:
  //  png_file  path to .png file
  // Output:
  //  id  of generated openGL texture
  // Returns true on success, false on failure
  IGL_INLINE bool texture_from_png(const std::string png_file, GLuint & id);
}
#endif

namespace igl
{
  // Read an image from a .png file and use it as a texture
  //
  // Input:
  //  png_file  path to .png file
  // Output:
  //  R,G,B,A texture channels
  // Returns true on success, false on failure
  IGL_INLINE bool texture_from_png(const std::string png_file,
  Eigen::Matrix<char,Eigen::Dynamic,Eigen::Dynamic>& R,
  Eigen::Matrix<char,Eigen::Dynamic,Eigen::Dynamic>& G,
  Eigen::Matrix<char,Eigen::Dynamic,Eigen::Dynamic>& B,
  Eigen::Matrix<char,Eigen::Dynamic,Eigen::Dynamic>& A
  );
}

#ifndef IGL_STATIC_LIBRARY
#  include "texture_from_png.cpp"
#endif

#endif