/*************************************************************************************************
?*?File:?imageLoader.cpp
?*?Date:?10/16/2017
?*
?*?Description:?This?file?is?meant?to?be?a?file?of?load/write?functions?for?the?original?program.
?*??????The?file?includes?both?a?useful?typedef?to?shorten?unsigned?chars?into?bytes?and?a?struct
?*??????meant?to?make?accessing?image?data?easier.
?*************************************************************************************************/
#include?“lodepng.h“
#include?

typedef?unsigned?char?byte;?//?most?useful?typedef?ever

/************************************************************************************************
?*?struct?imgData（byte*?uint?uint）
?*?-?a?struct?to?contain?all?information?about?our?image
?***********************************************************************************************/
struct?imgData?{
????imgData（byte*?pix?=?nullptr?unsigned?int?w?=?0?unsigned?int?h?=?0）?:?pixels（pix）?width（w）?height（h）?{
????};
????byte*?pixels;
????unsigned?int?width;
????unsigned?int?height;
};

/************************************************************************************************
?*?imgData?loadImage（char*）
?*?-?takes?in?a?filename?with?a?png?extension?and?uses?LodePNG?to?decode?it?the?resulting?data
?*?-?is?converted?to?grayscale?and?then?a?structure?containing?the?pixel?data?image?width?and
?*?-?height?are?returned?out.?Decoding?currently?uses?a?C?style?decoding?that?uses?free?and?an
?*?-?array?might?consider?re-writing?to?use?the?newer?decode?using?a?C++?vector?if?I?have?time.
?*??
?*?Inputs:?char*?filename?:?the?filename?of?the?image?to?load
?*?Outputs:???????imgData?:?a?structure?returned?containing?the?image?data?（pixels?width?height）
?*?
?***********************************************************************************************/
imgData?loadImage（char*?filename）?{
????unsigned?int?width?height;
????byte*?rgb;
????unsigned?error?=?lodepng_decode_file（&rgb?&width?&height?filename?LCT_RGBA?8）;
????if（error）?{
????????printf（“LodePNG?had?an?error?during?file?processing.?Exiting?program.\n“）;
????????printf（“Error?code:?%u:?%s\n“?error?lodepng_error_text（error））;
????????exit（2）;
????}
????byte*?grayscale?=?new?byte[width*height];
????byte*?img?=?rgb;
????for（int?i?=?0;?i?????????int?r?=?*img++;
????????int?g?=?*img++;
????????int?b?=?*img++;
????????int?a?=?*img++;
????????grayscale[i]?=?0.3*r?+?0.6*g?+?0.1*b+0.5;
????}
????free（rgb）;
????return?imgData（grayscale?width?height）;
}

/************************************************************************************************
?*?void?writeImage（char*?std::string?imgData）
?*?-?This?function?takes?a?filename?as?a?char?array?a?string?of?text?and?a?structure?containing
?*?-?the?image‘s?pixel?info?width?and?height.?The?function?will?take?the?original?filename
?*?-?remove?the?.png?ending?and?append?text?before?re-adding?the?.png?extension?then?lodepng?is
?*?-?ca