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diff --git a/example_optimize_png.cpp b/example_optimize_png.cpp
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@@ -1,133 +0,0 @@
-/*
-LodePNG Examples
-
-Copyright (c) 2005-2012 Lode Vandevenne
-
-This software is provided 'as-is', without any express or implied
-warranty. In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-    1. The origin of this software must not be misrepresented; you must not
-    claim that you wrote the original software. If you use this software
-    in a product, an acknowledgment in the product documentation would be
-    appreciated but is not required.
-
-    2. Altered source versions must be plainly marked as such, and must not be
-    misrepresented as being the original software.
-
-    3. This notice may not be removed or altered from any source
-    distribution.
-*/
-
-/*
-This example saves the PNG with the best compression LodePNG can do, and with
-unnecesary chunks removed. It tries out several combinations of settings and
-keeps the smallest one.
-
-NOTE: This is not as good as a true PNG optimizer like optipng or pngcrush.
-*/
-
-//g++ lodepng.cpp example_optimize_png.cpp -ansi -pedantic -Wall -Wextra -O3
-
-#include "lodepng.h"
-
-#include <iostream>
-
-int main(int argc, char *argv[])
-{
-  std::vector<unsigned char> image;
-  unsigned w, h;
-  std::vector<unsigned char> buffer;
-  unsigned error;
-  
-  //check if user gave a filename
-  if(argc < 3)
-  {
-    std::cout << "please provide in and out filename" << std::endl;
-    return 0;
-  }
-  
-  lodepng::load_file(buffer, argv[1]);
-  error = lodepng::decode(image, w, h, buffer);
-
-  if(error)
-  {
-    std::cout << "decoding error " << error << ": " << lodepng_error_text(error) << std::endl;
-    return 0;
-  }
-  
-  size_t origsize = buffer.size();
-  std::cout << "Original size: " << origsize << " (" << (origsize / 1024) << "K)" << std::endl;
-  buffer.clear();
-  
-  //Now encode as hard as possible with several filter types and window sizes
-  
-  lodepng::State state;
-  state.encoder.filter_palette_zero = 0; //We try several filter types, including zero, allow trying them all on palette images too.
-  state.encoder.add_id = false; //Don't add LodePNG version chunk to save more bytes
-  state.encoder.text_compression = 1; //Not needed because we don't add text chunks, but this demonstrates another optimization setting
-  state.encoder.zlibsettings.nicematch = 258; //Set this to the max possible, otherwise it can hurt compression
-  state.encoder.zlibsettings.lazymatching = 1; //Definitely use lazy matching for better compression
-  state.encoder.zlibsettings.windowsize = 32768; //Use maximum possible window size for best compression
-
-  size_t bestsize = 0;
-  bool inited = false;
-
-  int beststrategy = 0;
-  LodePNGFilterStrategy strategies[4] = { LFS_ZERO, LFS_MINSUM, LFS_ENTROPY, LFS_BRUTE_FORCE };
-  std::string strategynames[4] = { "LFS_ZERO", "LFS_MINSUM", "LFS_ENTROPY", "LFS_BRUTE_FORCE" };
-
-  // min match 3 allows all deflate lengths. min match 6 is similar to "Z_FILTERED" of zlib.
-  int minmatches[2] = { 3, 6 };
-  int bestminmatch = 0;
-  
-  int autoconverts[2] = { 0, 1 };
-  std::string autoconvertnames[2] = { "0", "1" };
-  int bestautoconvert = 0;
-
-  int bestblocktype = 0;
-
-  // Try out all combinations of everything
-  for(int i = 0; i < 4; i++) //filter strategy
-  for(int j = 0; j < 2; j++) //min match
-  for(int k = 0; k < 2; k++) //block type (for small images only)
-  for(int l = 0; l < 2; l++) //color convert strategy
-  {
-    if(bestsize > 3000 && (k > 0 || l > 0)) continue; /* these only make sense on small images */
-    std::vector<unsigned char> temp;
-    state.encoder.filter_strategy = strategies[i];
-    state.encoder.zlibsettings.minmatch = minmatches[j];
-    state.encoder.zlibsettings.btype = k == 0 ? 2 : 1;
-    state.encoder.auto_convert = autoconverts[l];
-    error = lodepng::encode(temp, image, w, h, state);
-
-    if(error)
-    {
-      std::cout << "encoding error " << error << ": " << lodepng_error_text(error) << std::endl;
-      return 0;
-    }
-
-    if(!inited || temp.size() < bestsize)
-    {
-      bestsize = temp.size();
-      beststrategy = i;
-      bestminmatch = state.encoder.zlibsettings.minmatch;
-      bestautoconvert = l;
-      bestblocktype = state.encoder.zlibsettings.btype;
-      temp.swap(buffer);
-      inited = true;
-    }
-  }
-  
-  std::cout << "Chosen filter strategy: " << strategynames[beststrategy] << std::endl;
-  std::cout << "Chosen min match: " << bestminmatch << std::endl;
-  std::cout << "Chosen block type: " << bestblocktype << std::endl;
-  std::cout << "Chosen auto convert: " << autoconvertnames[bestautoconvert] << std::endl;
-  
-  lodepng::save_file(buffer, argv[2]);
-  std::cout << "New size: " << buffer.size() << " (" << (buffer.size() / 1024) << "K)" << std::endl;
-}