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//Copyright (C) 2011 by Ivan Fratric
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//
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//Permission is hereby granted, free of charge, to any person obtaining a copy
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//of this software and associated documentation files (the "Software"), to deal
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//in the Software without restriction, including without limitation the rights
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//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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//copies of the Software, and to permit persons to whom the Software is
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//furnished to do so, subject to the following conditions:
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//
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//The above copyright notice and this permission notice shall be included in
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//all copies or substantial portions of the Software.
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//
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//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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//THE SOFTWARE.
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#pragma once
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#define IMGTYPE_RAW 0
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#define IMGTYPE_BMP 1
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#define IMGTYPE_PPM 2
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#define IMGTYPE_PGM 3
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#define IMGTYPE_UNSUPPORTED 999
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//handles basic image file input/output
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//only supports uncompressed image formats
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class ImageIO
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{
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protected:
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//gets the file extension of file filename
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const char *GetFileExtension(const char *filename);
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//determines the imege format from the filename
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int GetImageType(const char *filename);
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public:
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//loads the image from filename into image
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//automatically determines the image format
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void LoadImage(const char *filename, Image *image);
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//loads the image of the specified format (imageType) from filename into image
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void LoadImage(const char *filename, Image *image, int imageType);
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//saves the image into file named 'filename'
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//automatically determines the image format
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void SaveImage(const char *filename, Image *image);
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//saves the image into file named 'filename', using the format given as imageType
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void SaveImage(const char *filename, Image *image, int imageType);
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//loads the uncompressed BMP image from filename into image
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void LoadImageBMP(const char *filename, Image *image);
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//saves the image into file named 'filename' in uncompressed BMP format
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void SaveImageBMP(const char *filename, Image *image);
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//loads the PPM image from filename into image
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void LoadImagePPM(const char *filename, Image *image);
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//saves the image into file named 'filename' in PPM format
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void SaveImagePPM(const char *filename, Image *image);
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//loads the PGM image from filename into image
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void LoadImagePGM(const char *filename, Image *image);
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//saves the image into file named 'filename' in PGM format
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void SaveImagePGM(const char *filename, Image *image);
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//loads the image from the file named 'filename'
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//the file is assumed to be structured so that it only contains an array of raw (gray) pixel values
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//as the file does not contain the image width and height, those are passed as parameters to the function
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//if width and height are 0, the image is assumed to be square and the width and height are computed based on the file size
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void LoadImageRAW(const char *filename, Image *image, long width = 0, long height = 0);
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//saves the image to a file named 'filename'
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//only the array of raw (gray) pixel values is stored, without additional information such as image size
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void SaveImageRAW(const char *filename, Image *image);
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};
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