update bundled_deps

bundled_deps/libigl/igl/png/readPNG.cpp

@@ -0,0 +1,47 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2016 Daniele Panozzo <daniele.panozzo@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/.
+#include "readPNG.h"
+#include <igl_stb_image.h>
+
+IGL_INLINE bool igl::png::readPNG(
+  const std::string png_file,
+  Eigen::Matrix<unsigned char,Eigen::Dynamic,Eigen::Dynamic>& R,
+  Eigen::Matrix<unsigned char,Eigen::Dynamic,Eigen::Dynamic>& G,
+  Eigen::Matrix<unsigned char,Eigen::Dynamic,Eigen::Dynamic>& B,
+  Eigen::Matrix<unsigned char,Eigen::Dynamic,Eigen::Dynamic>& A
+)
+{
+  int cols,rows,n;
+  unsigned char *data = stbi_load(png_file.c_str(), &cols, &rows, &n, 4);
+  if(data == NULL) {
+    return false;
+  }
+
+  R.resize(cols,rows);
+  G.resize(cols,rows);
+  B.resize(cols,rows);
+  A.resize(cols,rows);
+
+  for (unsigned i=0; i<rows; ++i) {
+    for (unsigned j=0; j<cols; ++j) {
+      R(j,rows-1-i) = data[4*(j + cols * i) + 0];
+      G(j,rows-1-i) = data[4*(j + cols * i) + 1];
+      B(j,rows-1-i) = data[4*(j + cols * i) + 2];
+      A(j,rows-1-i) = data[4*(j + cols * i) + 3];
+    }
+  }
+
+  igl::stbi_image_free(data);
+
+  return true;
+}
+
+#ifdef IGL_STATIC_LIBRARY
+// Explicit template instantiation
+// generated by autoexplicit.sh
+#endif