Merge pull request #288 from openscad/issue11_2

Issue11 2

1 files changed, 0 insertions, 1899 deletions

diff --git a/tests/lodepng.h b/tests/lodepng.h
deleted file mode 100644
index a0a654f..0000000
--- a/tests/lodepng.h
+++ /dev/null
@@ -1,1899 +0,0 @@
-#ifndef LODEPNG_H_
-#define LODEPNG_H_
-
-/*
-LodePNG version 20110908
-
-Copyright (c) 2005-2011 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.
-*/
-
-#ifndef LODEPNG_H
-#define LODEPNG_H
-
-#include <string.h> /*for size_t*/
-
-#ifdef __cplusplus
-#include <vector>
-#include <string>
-#endif /*__cplusplus*/
-
-/* ////////////////////////////////////////////////////////////////////////// */
-/* Code Sections                                                              */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-The following #defines are used to create code sections. They can be disabled
-to disable code sections, which can give faster compile time and smaller binary.
-*/
-
-/*deflate&zlib encoder and deflate&zlib decoder.
-If this is disabled, you need to implement the dummy LodePNG_zlib_compress and
-LodePNG_zlib_decompress functions in the #else belonging to this #define in the
-source file.*/
-#define LODEPNG_COMPILE_ZLIB
-/*png encoder and png decoder*/
-#define LODEPNG_COMPILE_PNG
-/*deflate&zlib decoder and png decoder*/
-#define LODEPNG_COMPILE_DECODER
-/*deflate&zlib encoder and png encoder*/
-#define LODEPNG_COMPILE_ENCODER
-/*the optional built in harddisk file loading and saving functions*/
-#define LODEPNG_COMPILE_DISK
-/*any code or struct datamember related to chunks other than IHDR, IDAT, PLTE, tRNS, IEND*/
-#define LODEPNG_COMPILE_ANCILLARY_CHUNKS
-/*handling of unknown chunks*/
-#define LODEPNG_COMPILE_UNKNOWN_CHUNKS
-/*ability to convert error numerical codes to English text string*/
-#define LODEPNG_COMPILE_ERROR_TEXT
-
-/* ////////////////////////////////////////////////////////////////////////// */
-/* Simple Functions                                                           */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-This are the simple C and C++ functions, which cover basic usage.
-Further on in the header file are the more advanced functions allowing custom behaviour.
-*/
-
-#ifdef LODEPNG_COMPILE_PNG
-
-/*constants for the PNG color types. "LCT" = "LodePNG Color Type"*/
-#define LCT_GREY 0 /*PNG color type greyscale*/
-#define LCT_RGB 2 /*PNG color type RGB*/
-#define LCT_PALETTE 3 /*PNG color type palette*/
-#define LCT_GREY_ALPHA 4 /*PNG color type greyscale with alpha*/
-#define LCT_RGBA 6 /*PNG color type RGB with alpha*/
-
-#ifdef LODEPNG_COMPILE_DECODER
-/*
-Converts PNG data in memory to raw pixel data.
-out: Output parameter. Pointer to buffer that will contain the raw pixel data.
-     Its size is w * h * (bytes per pixel), bytes per pixel depends on colorType and bitDepth.
-     Must be freed after usage with free(*out).
-w: Output parameter. Pointer to width of pixel data.
-h: Output parameter. Pointer to height of pixel data.
-in: Memory buffer with the PNG file.
-insize: size of the in buffer.
-colorType: the desired color type for the raw output image. See explanation on PNG color types.
-bitDepth: the desired bit depth for the raw output image. See explanation on PNG color types.
-Return value: LodePNG error code (0 means no error).
-*/
-unsigned LodePNG_decode(unsigned char** out, unsigned* w, unsigned* h,
-                        const unsigned char* in, size_t insize, unsigned colorType, unsigned bitDepth);
-
-/*Same as LodePNG_decode, but uses colorType = 6 and bitDepth = 8 by default (32-bit RGBA)*/
-unsigned LodePNG_decode32(unsigned char** out, unsigned* w, unsigned* h,
-                          const unsigned char* in, size_t insize);
-
-/*Same as LodePNG_decode, but uses colorType = 2 and bitDepth = 8 by default (24-bit RGB)*/
-unsigned LodePNG_decode24(unsigned char** out, unsigned* w, unsigned* h,
-                          const unsigned char* in, size_t insize);
-
-#ifdef LODEPNG_COMPILE_DISK
-/*
-Load PNG from disk, from file with given name.
-out: Output parameter. Pointer to buffer that will contain the raw pixel data.
-     Its size is w * h * (bytes per pixel), bytes per pixel depends on colorType and bitDepth.
-     Must be freed after usage with free(*out).
-w: Output parameter. Pointer to width of pixel data.
-h: Output parameter. Pointer to height of pixel data.
-filename: Path on disk of the PNG file.
-colorType: the desired color type for the raw output image. See explanation on PNG color types.
-bitDepth: the desired bit depth for the raw output image. See explanation on PNG color types.
-Return value: LodePNG error code (0 means no error).
-*/
-unsigned LodePNG_decode_file(unsigned char** out, unsigned* w, unsigned* h,
-                             const char* filename, unsigned colorType, unsigned bitDepth);
-
-/*Same as LodePNG_decode_file, but uses colorType = 6 and bitDepth = 8 by default (32-bit RGBA)*/
-unsigned LodePNG_decode32_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename);
-
-/*Same as LodePNG_decode_file, but uses colorType = 2 and bitDepth = 8 by default (24-bit RGB)*/
-unsigned LodePNG_decode24_file(unsigned char** out, unsigned* w, unsigned* h, const char* filename);
-
-
-#endif /*LODEPNG_COMPILE_DISK*/
-#endif /*LODEPNG_COMPILE_DECODER*/
-
-#ifdef LODEPNG_COMPILE_ENCODER
-/*
-Converts raw pixel data into a PNG image in memory. The colorType and bitDepth
-  of the output PNG image cannot be chosen, they are automatically determined
-  by the colorType, bitDepth and content of the input pixel data.
-out: Output parameter. Pointer to buffer that will contain the raw pixel data.
-     Must be freed after usage with free(*out).
-outsize: Output parameter. Pointer to the size in bytes of the out buffer.
-image: The raw pixel data to encode. The size of this buffer should be
-       w * h * (bytes per pixel), bytes per pixel depends on colorType and bitDepth.
-w: width of the raw pixel data in pixels.
-h: height of the raw pixel data in pixels.
-colorType: the color type of the raw input image. See explanation on PNG color types.
-bitDepth: the bit depth of the raw input image. See explanation on PNG color types.
-Return value: LodePNG error code (0 means no error).
-*/
-unsigned LodePNG_encode(unsigned char** out, size_t* outsize,
-                        const unsigned char* image, unsigned w, unsigned h, unsigned colorType, unsigned bitDepth);
-
-/*Same as LodePNG_encode, but uses colorType = 6 and bitDepth = 8 by default (32-bit RGBA).*/
-unsigned LodePNG_encode32(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h);
-
-/*Same as LodePNG_encode, but uses colorType = 2 and bitDepth = 8 by default (24-bit RGB).*/
-unsigned LodePNG_encode24(unsigned char** out, size_t* outsize, const unsigned char* image, unsigned w, unsigned h);
-
-#ifdef LODEPNG_COMPILE_DISK
-
-/*
-Converts raw pixel data into a PNG file on disk. Same as LodePNG_encode, but
-outputs to disk instead of memory buffer.
-filename: path to file on disk to write the PNG image to.
-image: The raw pixel data to encode. The size of this buffer should be
-       w * h * (bytes per pixel), bytes per pixel depends on colorType and bitDepth.
-w: width of the raw pixel data in pixels.
-h: height of the raw pixel data in pixels.
-colorType: the color type of the raw input image. See explanation on PNG color types.
-bitDepth: the bit depth of the raw input image. See explanation on PNG color types.
-Return value: LodePNG error code (0 means no error).
-*/
-unsigned LodePNG_encode_file(const char* filename, const unsigned char* image,
-                             unsigned w, unsigned h, unsigned colorType, unsigned bitDepth);
-
-/*Same as LodePNG_encode_file, but uses colorType = 6 and bitDepth = 8 by default (32-bit RGBS).*/
-unsigned LodePNG_encode32_file(const char* filename, const unsigned char* image, unsigned w, unsigned h);
-
-/*Same as LodePNG_encode_file, but uses colorType = 2 and bitDepth = 8 by default (24-bit RGB).*/
-unsigned LodePNG_encode24_file(const char* filename, const unsigned char* image, unsigned w, unsigned h);
-#endif /*LODEPNG_COMPILE_DISK*/
-#endif /*LODEPNG_COMPILE_ENCODER*/
-
-#ifdef __cplusplus
-namespace LodePNG
-{
-
-#ifdef LODEPNG_COMPILE_DECODER
-  /*
-  Converts PNG data in memory to raw pixel data.
-  out: Output parameter, std::vector containing the raw pixel data. Its size
-    will be w * h * (bytes per pixel), where bytes per pixel is 4 if the default
-    colorType=6 and bitDepth=8 is used. The pixels are 32-bit RGBA bit in that case.
-  w: Output parameter, width of the image in pixels.
-  h: Output parameter, height of the image in pixels.
-  in: Memory buffer with the PNG file.
-  insize: size of the in buffer.
-  colorType: the desired color type for the raw output image. See explanation on PNG color types.
-  bitDepth: the desired bit depth for the raw output image. See explanation on PNG color types.
-  Return value: LodePNG error code (0 means no error).
-  */
-  unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-                  const unsigned char* in, size_t insize, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-
-  /*
-  Same as the decode function that takes a unsigned char buffer, but instead of giving
-  a pointer and a size, this takes the input buffer as an std::vector.
-  */
-  unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-                  const std::vector<unsigned char>& in, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-#ifdef LODEPNG_COMPILE_DISK
-  /*
-  Converts PNG file from disk to raw pixel data in memory.
-  out: Output parameter, std::vector containing the raw pixel data. Its size
-    will be w * h * (bytes per pixel), where bytes per pixel is 4 if the default
-    colorType=6 and bitDepth=8 is used. The pixels are 32-bit RGBA bit in that case.
-  w: Output parameter, width of the image in pixels.
-  h: Output parameter, height of the image in pixels.
-  filename: Path to PNG file on disk.
-  colorType: the desired color type for the raw output image. See explanation on PNG color types.
-  bitDepth: the desired bit depth for the raw output image. See explanation on PNG color types.
-  Return value: LodePNG error code (0 means no error).
-  */
-  unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h,
-                  const std::string& filename, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-#endif //LODEPNG_COMPILE_DISK
-#endif //LODEPNG_COMPILE_DECODER
-
-#ifdef LODEPNG_COMPILE_ENCODER
-  /*
-  Converts 32-bit RGBA raw pixel data into a PNG image in memory.
-  out: Output parameter, std::vector containing the PNG image data.
-  in: Memory buffer with raw pixel data. The size of this buffer should be
-       w * h * (bytes per pixel), With the default colorType=6 and bitDepth=8, bytes
-       per pixel should be 4 and the data is a 32-bit RGBA pixel buffer.
-  w: Width of the image in pixels.
-  h: Height of the image in pixels.
-  colorType: the color type of the raw input image. See explanation on PNG color types.
-  bitDepth: the bit depth of the raw input image. See explanation on PNG color types.
-  Return value: LodePNG error code (0 means no error).
-  */
-  unsigned encode(std::vector<unsigned char>& out, const unsigned char* in,
-                  unsigned w, unsigned h, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-
-  /*
-  Same as the encode function that takes a unsigned char buffer, but instead of giving
-  a pointer and a size, this takes the input buffer as an std::vector.
-  */
-  unsigned encode(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-                  unsigned w, unsigned h, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-#ifdef LODEPNG_COMPILE_DISK
-  /*
-  Converts 32-bit RGBA raw pixel data into a PNG file on disk.
-  filename: Path to the file to write the PNG image to.
-  in: Memory buffer with raw pixel data. The size of this buffer should be
-       w * h * (bytes per pixel), With the default colorType=6 and bitDepth=8, bytes
-       per pixel should be 4 and the data is a 32-bit RGBA pixel buffer.
-  w: Width of the image in pixels.
-  h: Height of the image in pixels.
-  colorType: the color type of the raw input image. See explanation on PNG color types.
-  bitDepth: the bit depth of the raw input image. See explanation on PNG color types.
-  Return value: LodePNG error code (0 means no error).
-  */
-  unsigned encode(const std::string& filename, const unsigned char* in,
-                  unsigned w, unsigned h, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-
-  /*
-  Same as the encode function that takes a unsigned char buffer, but instead of giving
-  a pointer and a size, this takes the input buffer as an std::vector.
-  */
-  unsigned encode(const std::string& filename, const std::vector<unsigned char>& in,
-                  unsigned w, unsigned h, unsigned colorType = LCT_RGBA, unsigned bitDepth = 8);
-#endif //LODEPNG_COMPILE_DISK
-#endif //LODEPNG_COMPILE_ENCODER
-} //namespace LodePNG
-#endif /*__cplusplus*/
-#endif /*LODEPNG_COMPILE_PNG*/
-
-#ifdef LODEPNG_COMPILE_ERROR_TEXT
-/*
-Returns a textual description of the error code, in English. The
-numerical value of the code itself is not included in this description.
-*/
-const char* LodePNG_error_text(unsigned code);
-#endif /*LODEPNG_COMPILE_ERROR_TEXT*/
-
-/* ////////////////////////////////////////////////////////////////////////// */
-/* Inflate & Deflate Setting Structs                                          */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-These structs contain settings for the decompression and compression of the
-PNG files. Typically you won't need these directly.
-*/
-
-#ifdef LODEPNG_COMPILE_DECODER
-typedef struct LodePNG_DecompressSettings
-{
-  unsigned ignoreAdler32; /*if 1, continue and don't give an error message if the Adler32 checksum is corrupted*/
-} LodePNG_DecompressSettings;
-
-extern const LodePNG_DecompressSettings LodePNG_defaultDecompressSettings;
-void LodePNG_DecompressSettings_init(LodePNG_DecompressSettings* settings);
-#endif /*LODEPNG_COMPILE_DECODER*/
-
-#ifdef LODEPNG_COMPILE_ENCODER
-/*
-Compression settings. Tweaking these settings tweaks the balance between
-speed and compression ratio.
-*/
-typedef struct LodePNG_CompressSettings /*deflate = compress*/
-{
-  /*LZ77 related settings*/
-  unsigned btype; /*the block type for LZ (0, 1, 2 or 3, see zlib standard). Should be 2 for proper compression.*/
-  unsigned useLZ77; /*whether or not to use LZ77. Should be 1 for proper compression.*/
-  unsigned windowSize; /*the maximum is 32768, higher gives more compression but is slower. Typical value: 2048.*/
-} LodePNG_CompressSettings;
-
-extern const LodePNG_CompressSettings LodePNG_defaultCompressSettings;
-void LodePNG_CompressSettings_init(LodePNG_CompressSettings* settings);
-#endif /*LODEPNG_COMPILE_ENCODER*/
-
-#ifdef LODEPNG_COMPILE_PNG
-/* ////////////////////////////////////////////////////////////////////////// */
-/* PNG and Raw Image Information Structs                                      */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-Info about the color type of an image.
-The same LodePNG_InfoColor struct is used for both the PNG and raw image type,
-even though they are two totally different things.
-*/
-typedef struct LodePNG_InfoColor
-{
-  /*header (IHDR)*/
-  unsigned colorType; /*color type, see PNG standard or documentation further in this header file*/
-  unsigned bitDepth;  /*bits per sample, see PNG standard or documentation further in this header file*/
-
-  /*
-  palette (PLTE and tRNS)
-
-  This is a dynamically allocated unsigned char array with the colors of the palette, including alpha.
-  The value palettesize indicates the amount of colors in the palette.
-  The allocated size of the buffer is 4 * palettesize bytes, in order RGBARGBARGBA...
-
-  When encoding a PNG, to store your colors in the palette of the LodePNG_InfoRaw, first use
-  LodePNG_InfoColor_clearPalette, then for each color use LodePNG_InfoColor_addPalette.
-
-  If you encode an image without alpha with palette, don't forget to put value 255 in each A byte of the palette.
-
-  When decoding, by default you can ignore this palette, since LodePNG already
-  fills the palette colors in the pixels of the raw RGBA output.
-  */
-  unsigned char* palette; /*palette in RGBARGBA... order*/
-  size_t palettesize; /*palette size in number of colors (amount of bytes is 4 * palettesize)*/
-
-  /*
-  transparent color key (tRNS)
-  This color uses the same bit depth as the bitDepth value in this struct, which can be 1-bit to 16-bit.
-  For greyscale PNGs, r, g and b will all 3 be set to the same.
-
-  When decoding, by default you can ignore this information, since LodePNG sets
-  pixels with this key to transparent already in the raw RGBA output.
-  */
-  unsigned key_defined; /*is a transparent color key given? 0 = false, 1 = true*/
-  unsigned key_r;       /*red/greyscale component of color key*/
-  unsigned key_g;       /*green component of color key*/
-  unsigned key_b;       /*blue component of color key*/
-} LodePNG_InfoColor;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_InfoColor_init(LodePNG_InfoColor* info);
-void LodePNG_InfoColor_cleanup(LodePNG_InfoColor* info);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_InfoColor_copy(LodePNG_InfoColor* dest, const LodePNG_InfoColor* source);
-
-void LodePNG_InfoColor_clearPalette(LodePNG_InfoColor* info);
-/*add 1 color to the palette*/
-unsigned LodePNG_InfoColor_addPalette(LodePNG_InfoColor* info, unsigned char r,
-                                      unsigned char g, unsigned char b, unsigned char a);
-
-/*additional color info*/
-
-/*get the total amount of bits per pixel, based on colorType and bitDepth in the struct*/
-unsigned LodePNG_InfoColor_getBpp(const LodePNG_InfoColor* info);
-/*get the amount of color channels used, based on colorType in the struct.
-If a palette is used, it counts as 1 channel.*/
-unsigned LodePNG_InfoColor_getChannels(const LodePNG_InfoColor* info);
-/*is it a greyscale type? (only colorType 0 or 4)*/
-unsigned LodePNG_InfoColor_isGreyscaleType(const LodePNG_InfoColor* info);
-/*has it got an alpha channel? (only colorType 2 or 6)*/
-unsigned LodePNG_InfoColor_isAlphaType(const LodePNG_InfoColor* info);
-/*has it got a palette? (only colorType 3)*/
-unsigned LodePNG_InfoColor_isPaletteType(const LodePNG_InfoColor* info);
-/*only returns true if there is a palette and there is a value in the palette with alpha < 255.
-Loops through the palette to check this.*/
-unsigned LodePNG_InfoColor_hasPaletteAlpha(const LodePNG_InfoColor* info);
-
-/*
-Check if the given color info indicates the possibility of having non-opaque pixels in the PNG image.
-Returns true if the image can have translucent or invisible pixels (it still be opaque if it doesn't use such pixels).
-Returns false if the image can only have opaque pixels.
-In detail, it returns true only if it's a color type with alpha, or has a palette with non-opaque values,
-or if "key_defined" is true.
-*/
-unsigned LodePNG_InfoColor_canHaveAlpha(const LodePNG_InfoColor* info);
-
-#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-/*
-The information of a Time chunk in PNG.
-To make the encoder add a time chunk, set time_defined to 1 and fill in
-the correct values in all the time parameters. LodePNG will not fill the current
-time in these values itself, all it does is copy them over into the chunk bytes.
-*/
-typedef struct LodePNG_Time
-{
-  unsigned      year;    /*2 bytes used (0-65535)*/
-  unsigned char month;   /*1-12*/
-  unsigned char day;     /*1-31*/
-  unsigned char hour;    /*0-23*/
-  unsigned char minute;  /*0-59*/
-  unsigned char second;  /*0-60 (to allow for leap seconds)*/
-} LodePNG_Time;
-
-/*
-Info about text chunks in a PNG file. The arrays can contain multiple keys
-and strings. The amount of keys and strings is the same. The amount of strings
-ends when the pointer to the string is a null pointer.
-
-They keyword of text chunks gives a short description what the actual text
-represents. There are a few standard standard keywords recognised
-by many programs: Title, Author, Description, Copyright, Creation Time,
-Software, Disclaimer, Warning, Source, Comment. It's allowed to use other keys.
-
-A keyword is minimum 1 character and maximum 79 characters long. It's
-discouraged to use a single line length longer than 79 characters for texts.
-*/
-typedef struct LodePNG_Text /*non-international text*/
-{
-  /*Don't allocate these text buffers yourself. Use the init/cleanup functions
-  correctly and use LodePNG_Text_add and LodePNG_Text_clear.*/
-  size_t num; /*the amount of texts in these char** buffers (there may be more texts in itext)*/
-  char** keys; /*the keyword of a text chunk (e.g. "Comment")*/
-  char** strings; /*the actual text*/
-} LodePNG_Text;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_Text_init(LodePNG_Text* text);
-void LodePNG_Text_cleanup(LodePNG_Text* text);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_Text_copy(LodePNG_Text* dest, const LodePNG_Text* source);
-
-/*Use these functions instead of allocating the char**s manually*/
-void LodePNG_Text_clear(LodePNG_Text* text); /*use this to clear the texts again after you filled them in*/
-unsigned LodePNG_Text_add(LodePNG_Text* text, const char* key, const char* str); /*push back both texts at once*/
-
-/*
-Info about international text chunks in a PNG file. The arrays can contain multiple keys
-and strings. The amount of keys, lengtags, transkeys and strings is the same.
-The amount of strings ends when the pointer to the string is a null pointer.
-
-A keyword is minimum 1 character and maximum 79 characters long. It's
-discouraged to use a single line length longer than 79 characters for texts.
-*/
-typedef struct LodePNG_IText /*international text*/
-{
-  /*Don't allocate these text buffers yourself. Use the init/cleanup functions
-  correctly and use LodePNG_IText_add and LodePNG_IText_clear.*/
-  
-  /*the amount of international texts in this PNG*/
-  size_t num;
-  /*the English keyword of the text chunk (e.g. "Comment")*/
-  char** keys;
-  /*the language tag for this text's international language, ISO/IEC 646 string, e.g. ISO 639 language tag*/
-  char** langtags;
-  /*keyword translated to the international language - UTF-8 string*/
-  char** transkeys;
-  /*the actual international text - UTF-8 string*/
-  char** strings;
-} LodePNG_IText;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_IText_init(LodePNG_IText* text);
-void LodePNG_IText_cleanup(LodePNG_IText* text);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_IText_copy(LodePNG_IText* dest, const LodePNG_IText* source);
-
-/*Use these functions instead of allocating the char**s manually*/
-void LodePNG_IText_clear(LodePNG_IText* text); /*use this to clear the itexts again after you filled them in*/
-unsigned LodePNG_IText_add(LodePNG_IText* text, const char* key, const char* langtag,
-                           const char* transkey, const char* str); /*push back the 4 texts of 1 chunk at once*/
-#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-
-#ifdef LODEPNG_COMPILE_UNKNOWN_CHUNKS
-/*
-Unknown chunks read from the PNG, or extra chunks the user wants to have added
-in the encoded PNG.
-*/
-typedef struct LodePNG_UnknownChunks
-{
-  /*There are 3 buffers, one for each position in the PNG where unknown chunks can appear
-    each buffer contains all unknown chunks for that position consecutively
-    The 3 buffers are the unknown chunks between certain critical chunks:
-    0: IHDR-PLTE, 1: PLTE-IDAT, 2: IDAT-IEND
-
-    Do not allocate or traverse this data yourself. Use the chunk traversing functions declared
-    later, such as LodePNG_chunk_next and LodePNG_append_chunk, to read/write this struct.
-    */
-  unsigned char* data[3];
-  size_t datasize[3]; /*size in bytes of the unknown chunks, given for protection*/
-
-} LodePNG_UnknownChunks;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_UnknownChunks_init(LodePNG_UnknownChunks* chunks);
-void LodePNG_UnknownChunks_cleanup(LodePNG_UnknownChunks* chunks);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_UnknownChunks_copy(LodePNG_UnknownChunks* dest, const LodePNG_UnknownChunks* src);
-#endif /*LODEPNG_COMPILE_UNKNOWN_CHUNKS*/
-
-/*
-Information about the PNG image, except pixels and sometimes except width and height.
-*/
-typedef struct LodePNG_InfoPng
-{
-  /*header (IHDR), palette (PLTE) and transparency (tRNS)*/
-
-  /*
-  Note: width and height are only used as information of a decoded PNG image. When encoding one, you don't have
-  to specify width and height in an LodePNG_Info struct, but you give them as parameters of the encode function.
-  The rest of the LodePNG_Info struct IS used by the encoder though!
-  */
-  unsigned width;             /*width of the image in pixels (ignored by encoder, but filled in by decoder)*/
-  unsigned height;            /*height of the image in pixels (ignored by encoder, but filled in by decoder)*/
-  unsigned compressionMethod; /*compression method of the original file. Always 0.*/
-  unsigned filterMethod;      /*filter method of the original file*/
-  unsigned interlaceMethod;   /*interlace method of the original file*/
-  LodePNG_InfoColor color;    /*color type and bits, palette and transparency of the PNG file*/
-
-#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-  /*
-  suggested background color (bKGD)
-  This color uses the same bit depth as the bitDepth value in this struct, which can be 1-bit to 16-bit.
-
-  For greyscale PNGs, r, g and b will all 3 be set to the same. When encoding
-  the encoder writes the red one. For palette PNGs: When decoding, the RGB value
-  will be stored, not a palette index. But when encoding, specify the index of
-  the palette in background_r, the other two are then ignored.
-
-  The decoder does not use this background color to edit the color of pixels.
-  */
-  unsigned background_defined; /*is a suggested background color given?*/
-  unsigned background_r;       /*red component of suggested background color*/
-  unsigned background_g;       /*green component of suggested background color*/
-  unsigned background_b;       /*blue component of suggested background color*/
-
-  /*non-international text chunks (tEXt and zTXt)*/
-  LodePNG_Text text;
-
-  /*international text chunks (iTXt)*/
-  LodePNG_IText itext;
-
-  /*time chunk (tIME)*/
-  unsigned char time_defined; /*if 0, no tIME chunk was or will be generated in the PNG image*/
-  LodePNG_Time time;
-
-  /*phys chunk (pHYs)*/
-  unsigned phys_defined; /*if 0, there is no pHYs chunk and the values below are undefined, if 1 else there is one*/
-  unsigned phys_x; /*pixels per unit in x direction*/
-  unsigned phys_y; /*pixels per unit in y direction*/
-  unsigned char phys_unit; /*may be 0 (unknown unit) or 1 (metre)*/
-#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-
-#ifdef LODEPNG_COMPILE_UNKNOWN_CHUNKS
-  /*unknown chunks*/
-  LodePNG_UnknownChunks unknown_chunks;
-#endif /*LODEPNG_COMPILE_UNKNOWN_CHUNKS*/
-} LodePNG_InfoPng;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_InfoPng_init(LodePNG_InfoPng* info);
-void LodePNG_InfoPng_cleanup(LodePNG_InfoPng* info);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_InfoPng_copy(LodePNG_InfoPng* dest, const LodePNG_InfoPng* source);
-
-/*
-Contains user-chosen information about the raw image data, which is independent of the PNG image
-With raw images, I mean the image data in the form of the simple raw buffer to which the
-compressed PNG data is decoded, or from which a PNG image can be encoded.
-*/
-typedef struct LodePNG_InfoRaw
-{
-  LodePNG_InfoColor color; /*color info of the raw image, note that the same struct as for PNG data is used.*/
-} LodePNG_InfoRaw;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_InfoRaw_init(LodePNG_InfoRaw* info);
-void LodePNG_InfoRaw_cleanup(LodePNG_InfoRaw* info);
-/*return value is error code (0 means no error)*/
-unsigned LodePNG_InfoRaw_copy(LodePNG_InfoRaw* dest, const LodePNG_InfoRaw* source);
-
-/*
-Converts raw buffer from one color type to another color type, based on
-LodePNG_InfoColor structs to describe the input and output color type.
-See the reference manual at the end of this header file to see which color conversions are supported.
-return value = LodePNG error code (0 if all went ok, an error if the conversion isn't supported)
-The out buffer must have size (w * h * bpp + 7) / 8, where bpp is the bits per pixel
-of the output color type (LodePNG_InfoColor_getBpp)
-*/
-unsigned LodePNG_convert(unsigned char* out, const unsigned char* in, LodePNG_InfoColor* infoOut,
-                         LodePNG_InfoColor* infoIn, unsigned w, unsigned h);
-
-#ifdef LODEPNG_COMPILE_DECODER
-
-/* ////////////////////////////////////////////////////////////////////////// */
-/* LodePNG Decoder                                                            */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-Settings for the decoder. This contains settings for the PNG and the Zlib
-decoder, but not the Info settings from the Info structs.
-*/
-typedef struct LodePNG_DecodeSettings
-{
-  LodePNG_DecompressSettings zlibsettings; /*in here is the setting to ignore Adler32 checksums*/
-
-  unsigned ignoreCrc; /*ignore CRC checksums*/
-  unsigned color_convert; /*whether to convert the PNG to the color type you want. Default: yes*/
-
-#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-  unsigned readTextChunks; /*if false but rememberUnknownChunks is true, they're stored in the unknown chunks*/
-#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-
-#ifdef LODEPNG_COMPILE_UNKNOWN_CHUNKS
-  /*store all bytes from unknown chunks in the InfoPng (off by default, useful for a png editor)*/
-  unsigned rememberUnknownChunks;
-#endif /*LODEPNG_COMPILE_UNKNOWN_CHUNKS*/
-} LodePNG_DecodeSettings;
-
-void LodePNG_DecodeSettings_init(LodePNG_DecodeSettings* settings);
-
-/*
-The LodePNG_Decoder struct has most input and output parameters the decoder uses,
-such as the settings, the info of the PNG and the raw data, and the error. Only
-the pixel buffer is not contained in this struct.
-*/
-typedef struct LodePNG_Decoder
-{
-  LodePNG_DecodeSettings settings; /*the decoding settings*/
-  LodePNG_InfoRaw infoRaw; /*specifies the format in which you would like to get the raw pixel buffer*/
-  LodePNG_InfoPng infoPng; /*info of the PNG image obtained after decoding*/
-  unsigned error;
-} LodePNG_Decoder;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_Decoder_init(LodePNG_Decoder* decoder);
-void LodePNG_Decoder_cleanup(LodePNG_Decoder* decoder);
-void LodePNG_Decoder_copy(LodePNG_Decoder* dest, const LodePNG_Decoder* source);
-
-/*
-Decode based on a LodePNG_Decoder.
-This function allocates the out buffer and stores the size in *outsize. This buffer
-needs to be freed after usage.
-Other information about the PNG file, such as the size, colorType and extra chunks
-are stored in the infoPng field of the LodePNG_Decoder.
-*/
-void LodePNG_Decoder_decode(LodePNG_Decoder* decoder, unsigned char** out, size_t* outsize,
-                            const unsigned char* in, size_t insize);
-
-/*
-Read the PNG header, but not the actual data. This returns only the information
-that is in the header chunk of the PNG, such as width, height and color type. The
-information is placed in the infoPng field of the LodePNG_Decoder.
-*/
-void LodePNG_Decoder_inspect(LodePNG_Decoder* decoder, const unsigned char* in, size_t insize);
-#endif /*LODEPNG_COMPILE_DECODER*/
-
-#ifdef LODEPNG_COMPILE_ENCODER
-/* ////////////////////////////////////////////////////////////////////////// */
-/* LodePNG Encoder                                                            */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*Settings for the encoder.*/
-typedef struct LodePNG_EncodeSettings
-{
-  LodePNG_CompressSettings zlibsettings; /*settings for the zlib encoder, such as window size, ...*/
-
-  /*Brute-force-search PNG filters by compressing each filter for each scanline.
-  This gives better compression, at the cost of being super slow.
-  Don't enable this for normal image saving, compression can take minutes
-  instead of seconds. This is experimental. If enabled, compression still isn't
-  as good as some other PNG encoders and optimizers, except for some images.
-  If you enable this, also consider setting zlibsettings.windowSize to 32768, and consider
-  using a less than 24-bit per pixel colorType if the image has <= 256 colors, for optimal compression.
-  Default: 0 (false)*/
-  unsigned bruteForceFilters;
-
-  /*automatically use color type without alpha instead of given one, if given image is opaque*/
-  unsigned autoLeaveOutAlphaChannel;
-  /*force creating a PLTE chunk if colortype is 2 or 6 (= a suggested palette).
-  If colortype is 3, PLTE is _always_ created.*/
-  unsigned force_palette;
-#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-  /*add LodePNG version as text chunk*/
-  unsigned add_id;
-  /*encode text chunks as zTXt chunks instead of tEXt chunks, and use compression in iTXt chunks*/
-  unsigned text_compression;
-#endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/
-} LodePNG_EncodeSettings;
-
-void LodePNG_EncodeSettings_init(LodePNG_EncodeSettings* settings);
-
-/*
-This struct has most input and output parameters the encoder uses,
-such as the settings, the info of the PNG and the raw data, and the error. Only
-the pixel buffer is not contained in this struct.
-*/
-typedef struct LodePNG_Encoder
-{
-  /*compression settings of the encoder*/
-  LodePNG_EncodeSettings settings;
-  /*the info specified by the user is not changed by the encoder. The encoder
-  will try to generate a PNG close to the given info.*/
-  LodePNG_InfoPng infoPng;
-  /*put the properties of the input raw image in here*/
-  LodePNG_InfoRaw infoRaw;
-  /*error value filled in if error happened, or 0 if all went ok*/
-  unsigned error;
-} LodePNG_Encoder;
-
-/*init, cleanup and copy functions to use with this struct*/
-void LodePNG_Encoder_init(LodePNG_Encoder* encoder);
-void LodePNG_Encoder_cleanup(LodePNG_Encoder* encoder);
-void LodePNG_Encoder_copy(LodePNG_Encoder* dest, const LodePNG_Encoder* source);
-
-/*This function allocates the out buffer with standard malloc and stores the size in *outsize.*/
-void LodePNG_Encoder_encode(LodePNG_Encoder* encoder, unsigned char** out, size_t* outsize,
-                            const unsigned char* image, unsigned w, unsigned h);
-#endif /*LODEPNG_COMPILE_ENCODER*/
-
-/* ////////////////////////////////////////////////////////////////////////// */
-/* Chunk Traversing Utilities                                                 */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-LodePNG_chunk functions:
-These functions need as input a large enough amount of allocated memory.
-These functions can be used on raw PNG data, but they are exposed in the API
-because they are needed if you want to traverse the unknown chunks stored
-in the LodePNG_UnknownChunks struct, or add new ones to it.
-*/
-
-/*get the length of the data of the chunk. Total chunk length has 12 bytes more.*/
-unsigned LodePNG_chunk_length(const unsigned char* chunk);
-
-/*puts the 4-byte type in null terminated string*/
-void LodePNG_chunk_type(char type[5], const unsigned char* chunk);
-
-/*check if the type is the given type*/
-unsigned char LodePNG_chunk_type_equals(const unsigned char* chunk, const char* type);
-
-/*
-These functions get properties of PNG chunks gotten from capitalization of chunk
-type name, as defined by the PNG standard.
-*/
-
-/*
-properties of PNG chunks gotten from capitalization of chunk type name, as defined by the standard
-0: ancillary chunk, 1: it's one of the critical chunk types
-*/
-unsigned char LodePNG_chunk_critical(const unsigned char* chunk);
-
-/*0: public, 1: private*/
-unsigned char LodePNG_chunk_private(const unsigned char* chunk);
-
-/*0: the chunk is unsafe to copy, 1: the chunk is safe to copy*/
-unsigned char LodePNG_chunk_safetocopy(const unsigned char* chunk);
-
-/*get pointer to the data of the chunk*/
-unsigned char* LodePNG_chunk_data(unsigned char* chunk);
-
-/*get pointer to the data of the chunk*/
-const unsigned char* LodePNG_chunk_data_const(const unsigned char* chunk);
-
-/*returns 0 if the crc is correct, 1 if it's incorrect*/
-unsigned LodePNG_chunk_check_crc(const unsigned char* chunk);
-
-/*generates the correct CRC from the data and puts it in the last 4 bytes of the chunk*/
-void LodePNG_chunk_generate_crc(unsigned char* chunk);
-
-/*iterate to next chunks. don't use on IEND chunk, as there is no next chunk then*/
-unsigned char* LodePNG_chunk_next(unsigned char* chunk);
-const unsigned char* LodePNG_chunk_next_const(const unsigned char* chunk);
-
-/*
-Appends chunk to the data in out. The given chunk should already have its chunk header.
-The out variable and outlength are updated to reflect the new reallocated buffer.
-Returns error code (0 if it went ok)
-*/
-unsigned LodePNG_append_chunk(unsigned char** out, size_t* outlength, const unsigned char* chunk);
-
-/*
-Appends new chunk to out. The chunk to append is given by giving its length, type
-and data separately. The type is a 4-letter string.
-The out variable and outlength are updated to reflect the new reallocated buffer.
-Returne error code (0 if it went ok)
-*/
-unsigned LodePNG_create_chunk(unsigned char** out, size_t* outlength, unsigned length,
-                              const char* type, const unsigned char* data);
-#endif /*LODEPNG_COMPILE_PNG*/
-
-#ifdef LODEPNG_COMPILE_ZLIB
-/* ////////////////////////////////////////////////////////////////////////// */
-/* Zlib encoder and decoder                                                   */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-/*
-This zlib part can be used independently to zlib compress and decompress a
-buffer. It cannot be used to create gzip files however, and it only supports the
-part of zlib that is required for PNG, it does not support dictionaries.
-*/
-
-#ifdef LODEPNG_COMPILE_DECODER
-/*Decompresses Zlib data. Reallocates the out buffer and appends the data. The
-data must be according to the zlib specification.
-Either, *out must be NULL and *outsize must be 0, or, *out must be a valid
-buffer and *outsize its size in bytes. out must be freed by user after usage.*/
-unsigned LodePNG_zlib_decompress(unsigned char** out, size_t* outsize,
-                                 const unsigned char* in, size_t insize, const LodePNG_DecompressSettings* settings);
-#endif /*LODEPNG_COMPILE_DECODER*/
-
-#ifdef LODEPNG_COMPILE_ENCODER
-/*Compresses data with Zlib. Reallocates the out buffer and appends the data.
-The data is output in the format of the zlib specification.
-Either, *out must be NULL and *outsize must be 0, or, *out must be a valid
-buffer and *outsize its size in bytes. out must be freed by user after usage.*/
-unsigned LodePNG_zlib_compress(unsigned char** out, size_t* outsize,
-                               const unsigned char* in, size_t insize, const LodePNG_CompressSettings* settings);
-#endif /*LODEPNG_COMPILE_ENCODER*/
-#endif /*LODEPNG_COMPILE_ZLIB*/
-
-#ifdef LODEPNG_COMPILE_DISK
-/*
-Load a file from disk into buffer. The function allocates the out buffer, and
-after usage you are responsible for freeing it.
-out: output parameter, contains pointer to loaded buffer.
-outsize: output parameter, size of the allocated out buffer
-filename: the path to the file to load
-return value: error code (0 means ok)
-*/
-unsigned LodePNG_loadFile(unsigned char** out, size_t* outsize, const char* filename);
-
-/*
-Save a file from buffer to disk. Warning, if it exists, this function overwrites
-the file without warning!
-buffer: the buffer to write
-buffersize: size of the buffer to write
-filename: the path to the file to save to
-return value: error code (0 means ok)
-*/
-unsigned LodePNG_saveFile(const unsigned char* buffer, size_t buffersize, const char* filename);
-#endif /*LODEPNG_COMPILE_DISK*/
-
-#ifdef __cplusplus
-/* ////////////////////////////////////////////////////////////////////////// */
-/* LodePNG C++ wrapper                                                        */
-/* ////////////////////////////////////////////////////////////////////////// */
-
-//The LodePNG C++ wrapper uses classes with handy constructors and destructors
-//instead of manual init and cleanup functions, and uses std::vectors instead of
-//manually allocated memory buffers.
-
-namespace LodePNG
-{
-#ifdef LODEPNG_COMPILE_ZLIB
-//The C++ wrapper for the zlib part
-#ifdef LODEPNG_COMPILE_DECODER
-  //Zlib-decompress an unsigned char buffer
-  unsigned decompress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-                      const LodePNG_DecompressSettings& settings = LodePNG_defaultDecompressSettings);
-
-  //Zlib-decompress an std::vector
-  unsigned decompress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-                      const LodePNG_DecompressSettings& settings = LodePNG_defaultDecompressSettings);
-#endif //LODEPNG_COMPILE_DECODER
-
-#ifdef LODEPNG_COMPILE_ENCODER
-  //Zlib-compress an unsigned char buffer
-  unsigned compress(std::vector<unsigned char>& out, const unsigned char* in, size_t insize,
-                    const LodePNG_CompressSettings& settings = LodePNG_defaultCompressSettings);
-
-  //Zlib-compress an std::vector
-  unsigned compress(std::vector<unsigned char>& out, const std::vector<unsigned char>& in,
-                    const LodePNG_CompressSettings& settings = LodePNG_defaultCompressSettings);
-#endif //LODEPNG_COMPILE_ENCODER
-#endif //LODEPNG_COMPILE_ZLIB
-
-#ifdef LODEPNG_COMPILE_PNG
-#ifdef LODEPNG_COMPILE_DECODER
-  /*
-  Class to decode a PNG image. Before decoding, settings can be set and
-  after decoding, extra information about the PNG can be retrieved.
-  Extends from the C-struct LodePNG_Decoder to add constructors and destructors
-  to initialize/cleanup it automatically. Beware, no virtual destructor is used.
-  */
-  class Decoder : public LodePNG_Decoder
-  {
-    public:
-
-    Decoder();
-    ~Decoder();
-    void operator=(const LodePNG_Decoder& other);
-
-    //decode PNG buffer to raw out buffer. Width and height can be retrieved with getWidth() and
-    //getHeight() and error should be checked with hasError() and getError()
-    void decode(std::vector<unsigned char>& out, const unsigned char* in, size_t insize);
-
-    //decode PNG buffer to raw out buffer. Width and height can be retrieved with getWidth() and
-    //getHeight() and error should be checked with hasError() and getError()
-    void decode(std::vector<unsigned char>& out, const std::vector<unsigned char>& in);
-
-    //inspect functions: get only the info from the PNG header. The info can then be retrieved with
-    //the functions of this class.
-    void inspect(const unsigned char* in, size_t insize);
-
-    //inspect functions: get only the info from the PNG header. The info can then be retrieved with
-    //the functions of this class.
-    void inspect(const std::vector<unsigned char>& in);
-
-    //error checking after decoding
-    bool hasError() const;
-    unsigned getError() const;
-
-    //convenient access to some InfoPng parameters after decoding
-    unsigned getWidth() const; //width of image in pixels
-    unsigned getHeight() const; //height of image in pixels
-    unsigned getBpp(); //bits per pixel
-    unsigned getChannels(); //amount of channels
-    unsigned isGreyscaleType(); //is it a greyscale type? (colorType 0 or 4)
-    unsigned isAlphaType(); //has it an alpha channel? (colorType 2 or 6)
-
-    //getters and setters for the decoding settings
-    const LodePNG_DecodeSettings& getSettings() const;
-    LodePNG_DecodeSettings& getSettings();
-    void setSettings(const LodePNG_DecodeSettings& info);
-
-    //getters and setters for the PNG image info, after decoding this describes information of the PNG image
-    const LodePNG_InfoPng& getInfoPng() const;
-    LodePNG_InfoPng& getInfoPng();
-    void setInfoPng(const LodePNG_InfoPng& info);
-    void swapInfoPng(LodePNG_InfoPng& info); //faster than copying with setInfoPng
-
-    //getters and setters for the raw image info, this determines in what format
-    //you get the pixel buffer from the decoder
-    const LodePNG_InfoRaw& getInfoRaw() const;
-    LodePNG_InfoRaw& getInfoRaw();
-    void setInfoRaw(const LodePNG_InfoRaw& info);
-  };
-#endif //LODEPNG_COMPILE_DECODER
-
-#ifdef LODEPNG_COMPILE_ENCODER
-  /*
-  Class to encode a PNG image. Before encoding, settings can be set.
-  Extends from the C-struct LodePNG_Enoder to add constructors and destructors
-  to initialize/cleanup it automatically. Beware, no virtual destructor is used.
-  */
-  class Encoder : public LodePNG_Encoder
-  {
-    public:
-
-    Encoder();
-    ~Encoder();
-    void operator=(const LodePNG_Encoder& other);
-
-    //encoding image to PNG buffer
-    void encode(std::vector<unsigned char>& out, const unsigned char* image, unsigned w, unsigned h);
-
-    //encoding image to PNG buffer
-    void encode(std::vector<unsigned char>& out, const std::vector<unsigned char>& image, unsigned w, unsigned h);
-
-    //error checking after decoding
-    bool hasError() const;
-    unsigned getError() const;
-
-    //convenient direct access to some parameters of the InfoPng
-    void clearPalette();
-    void addPalette(unsigned char r, unsigned char g, unsigned char b, unsigned char a); //add 1 color to the palette
-#ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS
-    void clearText();
-    void addText(const std::string& key, const std::string& str); //push back both texts at once
-    void clearIText();
-    void addIText(const std::string& key, const std::string& langtag,
-                  const std::string& transkey, const std::string& str);
-#endif //LODEPNG_COMPILE_ANCILLARY_CHUNKS
-
-    //getters and setters for the encoding settings
-    const LodePNG_EncodeSettings& getSettings() const;
-    LodePNG_EncodeSettings& getSettings();
-    void setSettings(const LodePNG_EncodeSettings& info);
-
-    //getters and setters for the PNG image info, this describes what color type
-    //and other settings the resulting PNG should have
-    const LodePNG_InfoPng& getInfoPng() const;
-    LodePNG_InfoPng& getInfoPng();
-    void setInfoPng(const LodePNG_InfoPng& info);
-    void swapInfoPng(LodePNG_InfoPng& info); //faster than copying with setInfoPng
-
-    //getters and setters for the raw image info, this describes how the encoder
-    //should interpret the input pixel buffer
-    const LodePNG_InfoRaw& getInfoRaw() const;
-    LodePNG_InfoRaw& getInfoRaw();
-    void setInfoRaw(const LodePNG_InfoRaw& info);
-  };
-#endif //LODEPNG_COMPILE_ENCODER
-
-#ifdef LODEPNG_COMPILE_DISK
-  /*
-  Load a file from disk into an std::vector. If the vector is empty, then either
-  the file doesn't exist or is an empty file.
-  */
-  void loadFile(std::vector<unsigned char>& buffer, const std::string& filename);
-
-  /*
-  Save the binary data in an std::vector to a file on disk. The file is overwritten
-  without warning.
-  */
-  void saveFile(const std::vector<unsigned char>& buffer, const std::string& filename);
-#endif //LODEPNG_COMPILE_DISK
-#endif //LODEPNG_COMPILE_PNG
-} //namespace LodePNG
-#endif /*end of __cplusplus wrapper*/
-
-/*
-TODO:
-[.] test if there are no memory leaks or security exploits - done a lot but needs to be checked often
-[.] check compatibility with vareous compilers  - done but needs to be redone for every newer version
-[ ] LZ77 encoder more like the one described in zlib - to make sure it's patentfree
-[X] converting color to 16-bit per channel types
-[ ] read all public PNG chunk types (but never let the color profile and gamma ones touch RGB values)
-[ ] make sure encoder generates no chunks with size > (2^31)-1
-[ ] partial decoding (stream processing)
-[ ] let the "isFullyOpaque" function check color keys and transparent palettes too
-[X] better name for the variables "codes", "codesD", "codelengthcodes", "clcl" and "lldl"
-[ ] don't stop decoding on errors like 69, 57, 58 (make warnings)
-[ ] make option to choose if the raw image with non multiple of 8 bits per scanline should have padding bits or not
-[ ] let the C++ wrapper catch exceptions coming from the standard library and return LodePNG error codes
-*/
-
-#endif /*LODEPNG_H inclusion guard*/
-
-/*
-LodePNG Documentation
----------------------
-
-This documentations contains background information and examples. For the function
-and class documentation, see the comments in the declarations above.
-
-0. table of contents
---------------------
-
-  1. about
-   1.1. supported features
-   1.2. features not supported
-  2. C and C++ version
-  3. security
-  4. decoding
-  5. encoding
-  6. color conversions
-    6.1. PNG color types
-    6.2. Default Behaviour of LodePNG
-    6.3. Color Conversions
-    6.4. More Notes
-  7. error values
-  8. chunks and PNG editing
-  9. compiler support
-  10. examples
-   10.1. decoder C++ example
-   10.2. encoder C++ example
-   10.3. decoder C example
-  11. changes
-  12. contact information
-
-
-1. about
---------
-
-PNG is a file format to store raster images losslessly with good compression,
-supporting different color types. It can be implemented in a patent-free way.
-
-LodePNG is a PNG codec according to the Portable Network Graphics (PNG)
-Specification (Second Edition) - W3C Recommendation 10 November 2003.
-
-The specifications used are:
-
-*) Portable Network Graphics (PNG) Specification (Second Edition):
-     http://www.w3.org/TR/2003/REC-PNG-20031110
-*) RFC 1950 ZLIB Compressed Data Format version 3.3:
-     http://www.gzip.org/zlib/rfc-zlib.html
-*) RFC 1951 DEFLATE Compressed Data Format Specification ver 1.3:
-     http://www.gzip.org/zlib/rfc-deflate.html
-
-The most recent version of LodePNG can currently be found at
-http://members.gamedev.net/lode/projects/LodePNG/
-
-LodePNG works both in C (ISO C90) and C++, with a C++ wrapper that adds
-extra functionality.
-
-LodePNG exists out of two files:
--lodepng.h: the header file for both C and C++
--lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage
-
-If you want to start using LodePNG right away without reading this doc, get the
-files lodepng_examples.c or lodepng_examples.cpp to see how to use it in code,
-or check the (smaller) examples in chapter 13 here.
-
-LodePNG is simple but only supports the basic requirements. To achieve
-simplicity, the following design choices were made: There are no dependencies
-on any external library. To decode PNGs, there's a Decoder struct or class that
-can convert any PNG file data into an RGBA image buffer with a single function
-call. To encode PNGs, there's an Encoder struct or class that can convert image
-data into PNG file data with a single function call. To read and write files,
-there are simple functions to convert the files to/from buffers in memory.
-
-This all makes LodePNG suitable for loading textures in games, demoscene
-productions, saving a screenshot, images in programs that require them for simple
-usage, ... It's less suitable for full fledged image editors, loading PNGs
-over network (it requires all the image data to be available before decoding can
-begin), life-critical systems, ...
-LodePNG has a standards conformant decoder and encoder, and supports the ability
-to make a somewhat conformant editor.
-
-1.1. supported features
------------------------
-
-The following features are supported by the decoder:
-
-*) decoding of PNGs with any color type, bit depth and interlace mode, to a 24- or 32-bit color raw image,
-   or the same color type as the PNG
-*) encoding of PNGs, from any raw image to 24- or 32-bit color, or the same color type as the raw image
-*) Adam7 interlace and deinterlace for any color type
-*) loading the image from harddisk or decoding it from a buffer from other sources than harddisk
-*) support for alpha channels, including RGBA color model, translucent palettes and color keying
-*) zlib decompression (inflate)
-*) zlib compression (deflate)
-*) CRC32 and ADLER32 checksums
-*) handling of unknown chunks, allowing making a PNG editor that stores custom and unknown chunks.
-*) the following chunks are supported (generated/interpreted) by both encoder and decoder:
-    IHDR: header information
-    PLTE: color palette
-    IDAT: pixel data
-    IEND: the final chunk
-    tRNS: transparency for palettized images
-    tEXt: textual information
-    zTXt: compressed textual information
-    iTXt: international textual information
-    bKGD: suggested background color
-    pHYs: physical dimensions
-    tIME: modification time
-
-1.2. features not supported
----------------------------
-
-The following features are _not_ supported:
-
-*) some features needed to make a conformant PNG-Editor might be still missing.
-*) partial loading/stream processing. All data must be available and is processed in one call.
-*) The following public chunks are not supported but treated as unknown chunks by LodePNG
-    cHRM, gAMA, iCCP, sRGB, sBIT, hIST, sPLT
-
-
-2. C and C++ version
---------------------
-
-The C version uses buffers allocated with alloc that you need to free()
-yourself. On top of that, you need to use init and cleanup functions for each
-struct whenever using a struct from the C version to avoid exploits and memory leaks.
-
-The C++ version has constructors and destructors that take care of these things,
-and uses std::vectors in the interface for storing data.
-
-Both the C and the C++ version are contained in this file! The C++ code depends on
-the C code, the C code works on its own.
-
-These files work without modification for both C and C++ compilers because all the
-additional C++ code is in "#ifdef __cplusplus" blocks that make C-compilers ignore
-it, and the C code is made to compile both with strict ISO C90 and C++.
-
-To use the C++ version, you need to rename the source file to lodepng.cpp (instead
-of lodepng.c), and compile it with a C++ compiler.
-
-To use the C version, you need to rename the source file to lodepng.c (instead
-of lodepng.cpp), and compile it with a C compiler.
-
-
-3. Security
------------
-
-As with most software, even if carefully designed, it's always possible that
-LodePNG may contain possible exploits.
-
-If you discover a possible exploit, please let me know, and it will be fixed.
-
-When using LodePNG, care has to be taken with the C version of LodePNG, as well as the C-style
-structs when working with C++. The following conventions are used for all C-style structs:
-
--if a struct has a corresponding init function, always call the init function when making a new one, to avoid exploits
--if a struct has a corresponding cleanup function, call it before the struct disappears to avoid memory leaks
--if a struct has a corresponding copy function, use the copy function instead of "=".
- The destination must also be inited already!
-
-4. Decoding
------------
-
-Decoding converts a PNG compressed image to a raw pixel buffer.
-
-Most documentation on using the decoder is at its declarations in the header
-above. For C, simple decoding can be done with functions such as LodePNG_decode32,
-and more advanced decoding can be done with the struct LodePNG_Decoder and its
-functions. For C++, simple decoding can be done with the LodePNG::decode functions
-and advanced decoding with the LodePNG::Decoder class.
-
-The Decoder contains 3 components:
-*) LodePNG_InfoPng: it stores information about the PNG (the input) in an LodePNG_InfoPng struct,
-   don't modify this one yourself
-*) Settings: you can specify a few other settings for the decoder to use
-*) LodePNG_InfoRaw: here you can say what type of raw image (the output) you want to get
-
-Some of the parameters described below may be inside the sub-struct "LodePNG_InfoColor color".
-In the C and C++ version, when using Info structs outside of the decoder or encoder, you need to use their
-init and cleanup functions, but normally you use the ones in the decoder that are already handled
-in the init and cleanup functions of the decoder itself.
-
-=LodePNG_InfoPng=
-
-This contains information such as the original color type of the PNG image, text
-comments, suggested background color, etc... More details about the LodePNG_InfoPng struct
-are at its declaration documentation.
-
-Because the dimensions of the image are important, there are shortcuts to get them in the
-C++ version: use decoder.getWidth() and decoder.getHeight().
-In the C version, use decoder.infoPng.width and decoder.infoPng.height.
-
-=LodePNG_InfoRaw=
-
-In the LodePNG_InfoRaw struct of the Decoder, you can specify which color type you want
-the resulting raw image to be. If this is different from the colorType of the
-PNG, then the decoder will automatically convert the result to your LodePNG_InfoRaw
-settings. Not all combinations of color conversions are supported though, see
-a different section for information about the color modes and supported conversions.
-
-Palette of LodePNG_InfoRaw isn't used by the Decoder, when converting from palette color
-to palette color, the values of the pixels are left untouched so that the colors
-will change if the palette is different. Color key of LodePNG_InfoRaw is not used by the
-Decoder. If setting color_convert is false then LodePNG_InfoRaw is completely ignored,
-but it will be modified to match the color type of the PNG so will be overwritten.
-
-By default, 32-bit color is used for the result.
-
-=Settings=
-
-The Settings can be used to ignore the errors created by invalid CRC and Adler32
-chunks, and to disable the decoding of tEXt chunks.
-
-There's also a setting color_convert, true by default. If false, no conversion
-is done, the resulting data will be as it was in the PNG (after decompression)
-and you'll have to puzzle the colors of the pixels together yourself using the
-color type information in the LodePNG_InfoPng.
-
-
-5. Encoding
------------
-
-Encoding converts a raw pixel buffer to a PNG compressed image.
-
-Most documentation on using the encoder is at its declarations in the header
-above. For C, simple encoding can be done with functions such as LodePNG_encode32,
-and more advanced decoding can be done with the struct LodePNG_Encoder and its
-functions. For C++, simple encoding can be done with the LodePNG::encode functions
-and advanced decoding with the LodePNG::Encoder class.
-
-Like the decoder, the encoder can also give errors. However it gives less errors
-since the encoder input is trusted, the decoder input (a PNG image that could
-be forged by anyone) is not trusted.
-
-Like the Decoder, the Encoder has 3 components:
-*) LodePNG_InfoRaw: here you say what color type of the raw image (the input) has
-*) Settings: you can specify a few settings for the encoder to use
-*) LodePNG_InfoPng: the same LodePNG_InfoPng struct as created by the Decoder. For the encoder,
-with this you specify how you want the PNG (the output) to be.
-
-Some of the parameters described below may be inside the sub-struct "LodePNG_InfoColor color".
-In the C and C++ version, when using Info structs outside of the decoder or encoder, you need to use their
-init and cleanup functions, but normally you use the ones in the encoder that are already handled
-in the init and cleanup functions of the decoder itself.
-
-=LodePNG_InfoPng=
-
-The Decoder class stores information about the PNG image in an LodePNG_InfoPng object. With
-the Encoder you can do the opposite: you give it an LodePNG_InfoPng object, and it'll try
-to match the LodePNG_InfoPng you give as close as possible in the PNG it encodes. For
-example in the LodePNG_InfoPng you can specify the color type you want to use, possible
-tEXt chunks you want the PNG to contain, etc... For an explanation of all the
-values in LodePNG_InfoPng see a further section. Not all PNG color types are supported
-by the Encoder.
-
-The encoder will not always exactly match the LodePNG_InfoPng struct you give,
-it tries as close as possible. Some things are ignored by the encoder. The width
-and height of LodePNG_InfoPng are ignored as well, because instead the width and
-height of the raw image you give in the input are used. In fact the encoder
-currently uses only the following settings from it:
--colorType and bitDepth: the ones it supports
--text chunks, that you can add to the LodePNG_InfoPng with "addText"
--the color key, if applicable for the given color type
--the palette, if you encode to a PNG with colorType 3
--the background color: it'll add a bKGD chunk to the PNG if one is given
--the interlaceMethod: None (0) or Adam7 (1)
-
-When encoding to a PNG with colorType 3, the encoder will generate a PLTE chunk.
-If the palette contains any colors for which the alpha channel is not 255 (so
-there are translucent colors in the palette), it'll add a tRNS chunk.
-
-=LodePNG_InfoRaw=
-
-You specify the color type of the raw image that you give to the input here,
-including a possible transparent color key and palette you happen to be using in
-your raw image data.
-
-By default, 32-bit color is assumed, meaning your input has to be in RGBA
-format with 4 bytes (unsigned chars) per pixel.
-
-=Settings=
-
-The following settings are supported (some are in sub-structs):
-*) autoLeaveOutAlphaChannel: when this option is enabled, when you specify a PNG
-color type with alpha channel (not to be confused with the color type of the raw
-image you specify!!), but the encoder detects that all pixels of the given image
-are opaque, then it'll automatically use the corresponding type without alpha
-channel, resulting in a smaller PNG image.
-*) btype: the block type for LZ77.
-   0 = uncompressed, 1 = fixed huffman tree, 2 = dynamic huffman tree (best compression)
-*) useLZ77: whether or not to use LZ77 for compressed block types
-*) windowSize: the window size used by the LZ77 encoder (1 - 32768)
-*) force_palette: if colorType is 2 or 6, you can make the encoder write a PLTE
-   chunk if force_palette is true. This can used as suggested palette to convert
-   to by viewers that don't support more than 256 colors (if those still exist)
-*) add_id: add text chunk "Encoder: LodePNG <version>" to the image.
-*) text_compression: default 0. If 1, it'll store texts as zTXt instead of tEXt chunks.
-  zTXt chunks use zlib compression on the text. This gives a smaller result on
-  large texts but a larger result on small texts (such as a single program name).
-  It's all tEXt or all zTXt though, there's no separate setting per text yet.
-
-
-6. color conversions
---------------------
-
-In LodePNG, the color mode (bits, channels and palette) used in the PNG image,
-and the color mode used in the raw data, are separate and independently
-configurable. Therefore, LodePNG needs to do conversions from one color mode to
-another. Not all possible conversions are supported (e.g. converting to a palette
-or a lower bit depth isn't supported). This section will explain which conversions
-are supported and how to configure this. This explains for example when LodePNG
-uses the settings in LodePNG_InfoPng, LodePNG_InfoRaw and Settings.
-
-6.1. PNG color types
---------------------
-
-A PNG image can have many color types, ranging from 1-bit color to 64-bit color,
-as well as palettized color modes. After the zlib decompression and unfiltering
-in the PNG image is done, the raw pixel data will have that color type and thus
-a certain amount of bits per pixel. If you want the output raw image after
-decoding to have another color type, a conversion is done by LodePNG.
-
-The PNG specification mentions the following color types:
-
-0: greyscale, bit depths 1, 2, 4, 8, 16
-2: RGB, bit depths 8 and 16
-3: palette, bit depths 1, 2, 4 and 8
-4: greyscale with alpha, bit depths 8 and 16
-6: RGBA, bit depths 8 and 16
-
-Bit depth is the amount of bits per pixel per color channel. So the total amount
-of bits per pixel = amount of channels * bitDepth.
-
-6.2. Default Behaviour of LodePNG
----------------------------------
-
-By default, the Decoder will convert the data from the PNG to 32-bit RGBA color,
-no matter what color type the PNG has, so that the result can be used directly
-as a texture in OpenGL etc... without worries about what color type the original
-image has.
-
-The Encoder assumes by default that the raw input you give it is a 32-bit RGBA
-buffer and will store the PNG as either 32 bit or 24 bit depending on whether
-or not any translucent pixels were detected in it.
-
-To get the default behaviour, don't change the values of LodePNG_InfoRaw and
-LodePNG_InfoPng of the encoder, and don't change the values of LodePNG_InfoRaw
-of the decoder.
-
-6.3. Color Conversions
-----------------------
-
-As explained in the sections about the Encoder and Decoder, you can specify
-color types and bit depths in LodePNG_InfoPng and LodePNG_InfoRaw, to change the default behaviour
-explained above. (for the Decoder you can only specify the LodePNG_InfoRaw, because the
-LodePNG_InfoPng contains what the PNG file has).
-
-To avoid some confusion:
--the Decoder converts from PNG to raw image
--the Encoder converts from raw image to PNG
--the color type and bit depth in LodePNG_InfoRaw, are those of the raw image
--the color type and bit depth in LodePNG_InfoPng, are those of the PNG
--if the color type of the LodePNG_InfoRaw and PNG image aren't the same, a conversion
-between the color types is done if the color types are supported. If it is not
-supported, an error is returned. If the types are the same, no conversion is done
-and this is supported for any color type.
-
-Supported color conversions:
--It's possible to load PNGs from any colortype and to save PNGs of any colorType.
--Both encoder and decoder use the same converter. So both encoder and decoder
-suport the same color types at the input and the output. So the decoder supports
-any type of PNG image and can convert it to certain types of raw image, while the
-encoder supports any type of raw data but only certain color types for the output PNG.
--The converter can convert from _any_ input color type, to 24-bit RGB or 32-bit RGBA (8 bits per channel)
--The converter can convert from _any_ input color type, to 48-bit RGB or 64-bit RGBA (16 bits per channel)
--The converter can convert from greyscale input color type, to 8-bit greyscale or greyscale with alpha
--The converter can convert from greyscale input color type, to 16-bit greyscale or greyscale with alpha
--If both color types are the same, conversion from anything to anything is possible
--Color types that are invalid according to the PNG specification are not allowed
--When converting from a type with alpha channel to one without, the alpha channel information is discarded
--When converting from a type without alpha channel to one with, the result will be opaque except
- pixels that have the same color as the color key of the input if one was given
--When converting from 16-bit bitDepth to 8-bit bitDepth, the 16-bit precision information is lost,
- only the most significant byte is kept
--When converting from 8-bit bitDepth to 16-bit bitDepth, the 8-bit byte is duplicated, so that 0 stays 0, and
- the 8-bit maximum 255 is converted to the 16-bit maximum 65535. Something similar happens at bit level for
- converting very low bit depths to 8 or 16 bit.
--Converting from color to greyscale or to palette is not supported on purpose: there are multiple possible
- algorithms to do this color reduction, LodePNG does not want to pick one and leaves this choice to the
- user instead, because it's beyond the scope of PNG encoding.
--Converting from a palette to a palette, only keeps the indices, it ignores the colors defined in the
- palette without giving an error
-
-No conversion needed...:
--If the color type of the PNG image and raw image are the same, then no
-conversion is done, and all color types are supported.
--In the encoder, you can make it save a PNG with any color by giving the
-LodePNG_InfoRaw and LodePNG_InfoPng the same color type.
--In the decoder, you can make it store the pixel data in the same color type
-as the PNG has, by setting the color_convert setting to false. Settings in
-infoRaw are then ignored.
-
-The function LodePNG_convert does this, which is available in the interface but
-normally isn't needed since the encoder and decoder already call it.
-
-6.4. More Notes
----------------
-
-In the PNG file format, if a less than 8-bit per pixel color type is used and the scanlines
-have a bit amount that isn't a multiple of 8, then padding bits are used so that each
-scanline starts at a fresh byte. But that is NOT true for the LodePNG input and output!
-The raw input image you give to the encoder, and the raw output image you get from the decoder
-will NOT have these padding bits, e.g. in the case of a 1-bit image with a width
-of 7 pixels, the first pixel of the second scanline will the the 8th bit of the first byte,
-not the first bit of a new byte.
-
-7. error values
----------------
-
-All functions in LodePNG that return an error code, return 0 if everything went
-OK, or one of the code defined by LodePNG if there was an error.
-
-The meaning of the LodePNG error values can be retrieved with the function
-LodePNG_error_text: given the numerical error code, it returns a description
-of the error in English as a string.
-
-Check the implementation of LodePNG_error_text to see the meaning of each error code.
-
-
-8. chunks and PNG editing
--------------------------
-
-If you want to add extra chunks to a PNG you encode, or use LodePNG for a PNG
-editor that should follow the rules about handling of unknown chunks, or if you
-program is able to read other types of chunks than the ones handled by LodePNG,
-then that's possible with the chunk functions of LodePNG.
-
-A PNG chunk has the following layout:
-
-4 bytes length
-4 bytes type name
-length bytes data
-4 bytes CRC
-
-
-8.1. iterating through chunks
------------------------------
-
-If you have a buffer containing the PNG image data, then the first chunk (the
-IHDR chunk) starts at byte number 8 of that buffer. The first 8 bytes are the
-signature of the PNG and are not part of a chunk. But if you start at byte 8
-then you have a chunk, and can check the following things of it.
-
-NOTE: none of these functions check for memory buffer boundaries. To avoid
-exploits, always make sure the buffer contains all the data of the chunks.
-When using LodePNG_chunk_next, make sure the returned value is within the
-allocated memory.
-
-unsigned LodePNG_chunk_length(const unsigned char* chunk):
-
-Get the length of the chunk's data. The total chunk length is this length + 12.
-
-void LodePNG_chunk_type(char type[5], const unsigned char* chunk):
-unsigned char LodePNG_chunk_type_equals(const unsigned char* chunk, const char* type):
-
-Get the type of the chunk or compare if it's a certain type
-
-unsigned char LodePNG_chunk_critical(const unsigned char* chunk):
-unsigned char LodePNG_chunk_private(const unsigned char* chunk):
-unsigned char LodePNG_chunk_safetocopy(const unsigned char* chunk):
-
-Check if the chunk is critical in the PNG standard (only IHDR, PLTE, IDAT and IEND are).
-Check if the chunk is private (public chunks are part of the standard, private ones not).
-Check if the chunk is safe to copy. If it's not, then, when modifying data in a critical
-chunk, unsafe to copy chunks of the old image may NOT be saved in the new one if your
-program doesn't handle that type of unknown chunk.
-
-unsigned char* LodePNG_chunk_data(unsigned char* chunk):
-const unsigned char* LodePNG_chunk_data_const(const unsigned char* chunk):
-
-Get a pointer to the start of the data of the chunk.
-
-unsigned LodePNG_chunk_check_crc(const unsigned char* chunk):
-void LodePNG_chunk_generate_crc(unsigned char* chunk):
-
-Check if the crc is correct or generate a correct one.
-
-unsigned char* LodePNG_chunk_next(unsigned char* chunk):
-const unsigned char* LodePNG_chunk_next_const(const unsigned char* chunk):
-
-Iterate to the next chunk. This works if you have a buffer with consecutive chunks. Note that these
-functions do no boundary checking of the allocated data whatsoever, so make sure there is enough
-data available in the buffer to be able to go to the next chunk.
-
-unsigned LodePNG_append_chunk(unsigned char** out, size_t* outlength, const unsigned char* chunk):
-unsigned LodePNG_create_chunk(unsigned char** out, size_t* outlength, unsigned length,
-                              const char* type, const unsigned char* data):
-
-These functions are used to create new chunks that are appended to the data in *out that has
-length *outlength. The append function appends an existing chunk to the new data. The create
-function creates a new chunk with the given parameters and appends it. Type is the 4-letter
-name of the chunk.
-
-
-8.2. chunks in infoPng
-----------------------
-
-The LodePNG_InfoPng struct contains a struct LodePNG_UnknownChunks in it. This
-struct has 3 buffers (each with size) to contain 3 types of unknown chunks:
-the ones that come before the PLTE chunk, the ones that come between the PLTE
-and the IDAT chunks, and the ones that come after the IDAT chunks.
-It's necessary to make the distionction between these 3 cases because the PNG
-standard forces to keep the ordering of unknown chunks compared to the critical
-chunks, but does not force any other ordering rules.
-
-infoPng.unknown_chunks.data[0] is the chunks before PLTE
-infoPng.unknown_chunks.data[1] is the chunks after PLTE, before IDAT
-infoPng.unknown_chunks.data[2] is the chunks after IDAT
-
-The chunks in these 3 buffers can be iterated through and read by using the same
-way described in the previous subchapter.
-
-When using the decoder to decode a PNG, you can make it store all unknown chunks
-if you set the option settings.rememberUnknownChunks to 1. By default, this option
-is off and is 0.
-
-The encoder will always encode unknown chunks that are stored in the infoPng. If
-you need it to add a particular chunk that isn't known by LodePNG, you can use
-LodePNG_append_chunk or LodePNG_create_chunk to the chunk data in
-infoPng.unknown_chunks.data[x].
-
-Chunks that are known by LodePNG should not be added in that way. E.g. to make
-LodePNG add a bKGD chunk, set background_defined to true and add the correct
-parameters there and LodePNG will generate the chunk.
-
-
-9. compiler support
--------------------
-
-No libraries other than the current standard C library are needed to compile
-LodePNG. For the C++ version, only the standard C++ library is needed on top.
-Add the files lodepng.c(pp) and lodepng.h to your project, include
-lodepng.h where needed, and your program can read/write PNG files.
-
-Use optimization! For both the encoder and decoder, compiling with the best
-optimizations makes a large difference.
-
-Make sure that LodePNG is compiled with the same compiler of the same version
-and with the same settings as the rest of the program, or the interfaces with
-std::vectors and std::strings in C++ can be incompatible resulting in bad things.
-
-CHAR_BITS must be 8 or higher, because LodePNG uses unsigned chars for octets.
-
-*) gcc and g++
-
-LodePNG is developed in gcc so this compiler is natively supported. It gives no
-warnings with compiler options "-Wall -Wextra -pedantic -ansi", with gcc and g++
-version 4.5.1 on Linux.
-
-*) Mingw and Bloodshed DevC++
-
-The Mingw compiler (a port of gcc) used by Bloodshed DevC++ for Windows is fully
-supported by LodePNG.
-
-*) Visual Studio 2005 and Visual C++ 2005 Express Edition
-
-Versions 20070604 up to 20080107 have been tested on VS2005 and work. Visual
-studio may give warnings about 'fopen' being deprecated. A multiplatform library
-can't support the proposed Visual Studio alternative however.
-
-If you're using LodePNG in VS2005 and don't want to see the deprecated warnings,
-put this on top of lodepng.h before the inclusions: #define _CRT_SECURE_NO_DEPRECATE
-
-*) Visual Studio 6.0
-
-The C++ version of LodePNG was not supported by Visual Studio 6.0 because Visual
-Studio 6.0 doesn't follow the C++ standard and implements it incorrectly.
-The current C version of LodePNG has not been tested in VS6 but may work now.
-
-*) Comeau C/C++
-
-Vesion 20070107 compiles without problems on the Comeau C/C++ Online Test Drive
-at http://www.comeaucomputing.com/tryitout in both C90 and C++ mode.
-
-*) Compilers on Macintosh
-
-LodePNG has been reported to work both with the gcc and LLVM for Macintosh, both
-for C and C++.
-
-*) Other Compilers
-
-If you encounter problems on other compilers, I'm happy to help out make LodePNG
-support the compiler if it supports the ISO C90 and C++ standard well enough and
-the required modification doesn't require using non standard or less good C/C++
-code or headers.
-
-
-10. examples
-------------
-
-This decoder and encoder example show the most basic usage of LodePNG (using the
-classes, not the simple functions, which would be trivial)
-
-More complex examples can be found in:
--lodepng_examples.c: 9 different examples in C, such as showing the image with SDL, ...
--lodepng_examples.cpp: the same examples in C++ using the C++ wrapper of LodePNG
-
-These files can be found on the LodePNG website or searched for on the internet.
-
-10.1. decoder C++ example
--------------------------
-
-////////////////////////////////////////////////////////////////////////////////
-#include "lodepng.h"
-#include <iostream>
-
-int main(int argc, char *argv[])
-{
-  const char* filename = argc > 1 ? argv[1] : "test.png";
-
-  //load and decode
-  std::vector<unsigned char> buffer, image; //buffer will contain the PNG file, image will contain the raw pixels
-  LodePNG::loadFile(buffer, filename); //load the image file with given filename
-  LodePNG::Decoder decoder;
-  decoder.decode(image, buffer.size() ? &buffer[0] : 0, (unsigned)buffer.size()); //decode the png
-
-  //if there's an error, display it
-  if(decoder.hasError())
-    std::cout << "error " << decoder.getError() << ": "<< LodePNG_error_text(decoder.getError()) << std::endl;
-
-  int width = decoder.getWidth(); //get the width in pixels
-  int height = decoder.getHeight(); //get the height in pixels
-  //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ...
-}
-
-//alternative version using the "simple" function
-int main(int argc, char *argv[])
-{
-  const char* filename = argc > 1 ? argv[1] : "test.png";
-
-  //load and decode
-  std::vector<unsigned char> image;
-  unsigned width, height;
-  unsigned error = LodePNG::decode(image, width, height, filename);
-
-  //if there's an error, display it
-  if(error != 0) std::cout << "error " << error << ": " << LodePNG_error_text(error) << std::endl;
-
-  //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ...
-}
-////////////////////////////////////////////////////////////////////////////////
-
-
-10.2. encoder C++ example
--------------------------
-
-////////////////////////////////////////////////////////////////////////////////
-#include "lodepng.h"
-#include <iostream>
-
-//saves image to filename given as argument. Warning, this overwrites the file without warning!
-int main(int argc, char *argv[])
-{
-  //check if user gave a filename
-  if(argc <= 1)
-  {
-    std::cout << "please provide a filename to save to\n";
-    return 0;
-  }
-
-  //generate some image
-  std::vector<unsigned char> image;
-  image.resize(512 * 512 * 4);
-  for(unsigned y = 0; y < 512; y++)
-  for(unsigned x = 0; x < 512; x++)
-  {
-    image[4 * 512 * y + 4 * x + 0] = 255 * !(x & y);
-    image[4 * 512 * y + 4 * x + 1] = x ^ y;
-    image[4 * 512 * y + 4 * x + 2] = x | y;
-    image[4 * 512 * y + 4 * x + 3] = 255;
-  }
-
-  //encode and save, using the Encoder class
-  std::vector<unsigned char> buffer;
-  LodePNG::Encoder encoder;
-  encoder.encode(buffer, image, 512, 512);
-  LodePNG::saveFile(buffer, argv[1]);
-
-  //the same as the 4 lines of code above, but in 1 call without the class:
-  //LodePNG::encode(argv[1], image, 512, 512);
-}
-////////////////////////////////////////////////////////////////////////////////
-
-
-10.3. Decoder C example
------------------------
-
-This example loads the PNG from a file into a pixel buffer in 1 function call
-
-#include "lodepng.h"
-
-int main(int argc, char *argv[])
-{
-  unsigned error;
-  unsigned char* image;
-  size_t width, height;
-
-  if(argc <= 1) return 0;
-
-  error = LodePNG_decode32_file(&image, &width, &height, filename);
-
-  if(error != 0) printf("error %u: %s\n", error, LodePNG_error_text(error));
-
-  //use image here
-
-  free(image);
-}
-
-
-11. changes
------------
-
-The version number of LodePNG is the date of the change given in the format
-yyyymmdd.
-
-Some changes aren't backwards compatible. Those are indicated with a (!)
-symbol.
-
-*) 8 sep 2011: lz77 encoder lazy matching instead of greedy matching.
-*) 23 aug 2011: tweaked the zlib compression parameters after benchmarking.
-    A bug with the PNG filtertype heuristic was fixed, so that it chooses much
-    better ones (it's quite significant). A setting to do an experimental, slow,
-    brute force search for PNG filter types is added.
-*) 17 aug 2011 (!): changed some C zlib related function names.
-*) 16 aug 2011: made the code less wide (max 120 characters per line).
-*) 17 apr 2011: code cleanup. Bugfixes. Convert low to 16-bit per sample colors.
-*) 21 feb 2011: fixed compiling for C90. Fixed compiling with sections disabled.
-*) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman
-    to optimize long sequences of zeros.
-*) 13 nov 2010: added LodePNG_InfoColor_hasPaletteAlpha and
-    LodePNG_InfoColor_canHaveAlpha functions for convenience.
-*) 7 nov 2010: added LodePNG_error_text function to get error code description.
-*) 30 okt 2010: made decoding slightly faster
-*) 26 okt 2010: (!) changed some C function and struct names (more consistent).
-     Reorganized the documentation and the declaration order in the header.
-*) 08 aug 2010: only changed some comments and external samples.
-*) 05 jul 2010: fixed bug thanks to warnings in the new gcc version.
-*) 14 mar 2010: fixed bug where too much memory was allocated for char buffers.
-*) 02 sep 2008: fixed bug where it could create empty tree that linux apps could
-    read by ignoring the problem but windows apps couldn't.
-*) 06 jun 2008: added more error checks for out of memory cases.
-*) 26 apr 2008: added a few more checks here and there to ensure more safety.
-*) 06 mar 2008: crash with encoding of strings fixed
-*) 02 feb 2008: support for international text chunks added (iTXt)
-*) 23 jan 2008: small cleanups, and #defines to divide code in sections
-*) 20 jan 2008: support for unknown chunks allowing using LodePNG for an editor.
-*) 18 jan 2008: support for tIME and pHYs chunks added to encoder and decoder.
-*) 17 jan 2008: ability to encode and decode compressed zTXt chunks added
-    Also vareous fixes, such as in the deflate and the padding bits code.
-*) 13 jan 2008: Added ability to encode Adam7-interlaced images. Improved
-    filtering code of encoder.
-*) 07 jan 2008: (!) changed LodePNG to use ISO C90 instead of C++. A
-    C++ wrapper around this provides an interface almost identical to before.
-    Having LodePNG be pure ISO C90 makes it more portable. The C and C++ code
-    are together in these files but it works both for C and C++ compilers.
-*) 29 dec 2007: (!) changed most integer types to unsigned int + other tweaks
-*) 30 aug 2007: bug fixed which makes this Borland C++ compatible
-*) 09 aug 2007: some VS2005 warnings removed again
-*) 21 jul 2007: deflate code placed in new namespace separate from zlib code
-*) 08 jun 2007: fixed bug with 2- and 4-bit color, and small interlaced images
-*) 04 jun 2007: improved support for Visual Studio 2005: crash with accessing
-    invalid std::vector element [0] fixed, and level 3 and 4 warnings removed
-*) 02 jun 2007: made the encoder add a tag with version by default
-*) 27 may 2007: zlib and png code separated (but still in the same file),
-    simple encoder/decoder functions added for more simple usage cases
-*) 19 may 2007: minor fixes, some code cleaning, new error added (error 69),
-    moved some examples from here to lodepng_examples.cpp
-*) 12 may 2007: palette decoding bug fixed
-*) 24 apr 2007: changed the license from BSD to the zlib license
-*) 11 mar 2007: very simple addition: ability to encode bKGD chunks.
-*) 04 mar 2007: (!) tEXt chunk related fixes, and support for encoding
-    palettized PNG images. Plus little interface change with palette and texts.
-*) 03 mar 2007: Made it encode dynamic Huffman shorter  with repeat codes.
-    Fixed a bug where the end code of a block had length 0 in the Huffman tree.
-*) 26 feb 2007: Huffman compression with dynamic trees (BTYPE 2) now implemented
-    and supported by the encoder, resulting in smaller PNGs at the output.
-*) 27 jan 2007: Made the Adler-32 test faster so that a timewaste is gone.
-*) 24 jan 2007: gave encoder an error interface. Added color conversion from any
-    greyscale type to 8-bit greyscale with or without alpha.
-*) 21 jan 2007: (!) Totally changed the interface. It allows more color types
-    to convert to and is more uniform. See the manual for how it works now.
-*) 07 jan 2007: Some cleanup & fixes, and a few changes over the last days:
-    encode/decode custom tEXt chunks, separate classes for zlib & deflate, and
-    at last made the decoder give errors for incorrect Adler32 or Crc.
-*) 01 jan 2007: Fixed bug with encoding PNGs with less than 8 bits per channel.
-*) 29 dec 2006: Added support for encoding images without alpha channel, and
-    cleaned out code as well as making certain parts faster.
-*) 28 dec 2006: Added "Settings" to the encoder.
-*) 26 dec 2006: The encoder now does LZ77 encoding and produces much smaller files now.
-    Removed some code duplication in the decoder. Fixed little bug in an example.
-*) 09 dec 2006: (!) Placed output parameters of public functions as first parameter.
-    Fixed a bug of the decoder with 16-bit per color.
-*) 15 okt 2006: Changed documentation structure
-*) 09 okt 2006: Encoder class added. It encodes a valid PNG image from the
-    given image buffer, however for now it's not compressed.
-*) 08 sep 2006: (!) Changed to interface with a Decoder class
-*) 30 jul 2006: (!) LodePNG_InfoPng , width and height are now retrieved in different
-    way. Renamed decodePNG to decodePNGGeneric.
-*) 29 jul 2006: (!) Changed the interface: image info is now returned as a
-    struct of type LodePNG::LodePNG_Info, instead of a vector, which was a bit clumsy.
-*) 28 jul 2006: Cleaned the code and added new error checks.
-    Corrected terminology "deflate" into "inflate".
-*) 23 jun 2006: Added SDL example in the documentation in the header, this
-    example allows easy debugging by displaying the PNG and its transparency.
-*) 22 jun 2006: (!) Changed way to obtain error value. Added
-    loadFile function for convenience. Made decodePNG32 faster.
-*) 21 jun 2006: (!) Changed type of info vector to unsigned.
-    Changed position of palette in info vector. Fixed an important bug that
-    happened on PNGs with an uncompressed block.
-*) 16 jun 2006: Internally changed unsigned into unsigned where
-    needed, and performed some optimizations.
-*) 07 jun 2006: (!) Renamed functions to decodePNG and placed them
-    in LodePNG namespace. Changed the order of the parameters. Rewrote the
-    documentation in the header. Renamed files to lodepng.cpp and lodepng.h
-*) 22 apr 2006: Optimized and improved some code
-*) 07 sep 2005: (!) Changed to std::vector interface
-*) 12 aug 2005: Initial release (C++, decoder only)
-
-
-12. contact information
------------------------
-
-Feel free to contact me with suggestions, problems, comments, ... concerning
-LodePNG. If you encounter a PNG image that doesn't work properly with this
-decoder, feel free to send it and I'll use it to find and fix the problem.
-
-My email address is (puzzle the account and domain together with an @ symbol):
-Domain: gmail dot com.
-Account: lode dot vandevenne.
-
-
-Copyright (c) 2005-2011 Lode Vandevenne
-*/
-
-#endif
-