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73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
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LodePNG Examples
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Copyright (c) 2005-2010 Lode Vandevenne
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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/*
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LodePNG decode-encode: decodes the image, then encodes it again, with all the
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same information, chunks, color types, etc... as the original image had.
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This sample shows how LodePNG can be used for a conforming PNG editor.
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*/
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//g++ lodepng.cpp example_reencode.cpp -ansi -pedantic -Wall -Wextra -lSDL -O3 -o reencode
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#include "lodepng.h"
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#include <iostream>
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int main(int argc, char *argv[]) {
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std::vector<unsigned char> image;
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unsigned w, h;
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std::vector<unsigned char> buffer;
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lodepng::State state;
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unsigned error;
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//check if user gave a filename
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if(argc < 3) {
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std::cout << "please provide in and out filename" << std::endl;
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return 0;
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}
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state.decoder.color_convert = 0;
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state.decoder.remember_unknown_chunks = 1; //make it reproduce even unknown chunks in the saved image
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lodepng::load_file(buffer, argv[1]);
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error = lodepng::decode(image, w, h, state, buffer);
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if(error) {
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std::cout << "decoder error " << error << ": " << lodepng_error_text(error) << std::endl;
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return 0;
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}
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buffer.clear();
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state.encoder.text_compression = 1;
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error = lodepng::encode(buffer, image, w, h, state);
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if(error) {
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std::cout << "encoder error " << error << ": " << lodepng_error_text(error) << std::endl;
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return 0;
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}
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lodepng::save_file(buffer, argv[2]);
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}
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