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imageTools.h

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00001 //==============================================
00002 //  copyright            : (C) 2003-2005 by Will Stokes
00003 //==============================================
00004 //  This program is free software; you can redistribute it
00005 //  and/or modify it under the terms of the GNU General
00006 //  Public License as published by the Free Software
00007 //  Foundation; either version 2 of the License, or
00008 //  (at your option) any later version.
00009 //==============================================
00010 
00011 #ifndef BACKEND_TOOLS_IMAGETOOLS_H
00012 #define BACKEND_TOOLS_IMAGETOOLS_H
00013 
00014 //--------------------
00015 //forward declarations
00016 //--------------------
00017 class QString;
00018 class QImage;
00019 class QPoint;
00020 class QSize;
00021 #include <qcolor.h>
00022 
00023 //Transform Codes
00024 typedef enum 
00025 {
00026   ROTATE_90,    //rotate clockwise 90 degrees
00027   ROTATE_270,  //rotate counter-clockwise 90 degrees
00028   FLIP_H,              //flip left-to-right
00029   FLIP_V,              //flip top-to-bottom
00030 } TRANSFORM_CODE;
00031 
00033 bool isJpeg(const char* filename);
00034 
00037 void calcScaledImageDimensions(int origWidth, int origHeight,
00038                                int idealWidth, int idealHeight,
00039                                int& width, int& height);
00040 
00042 void constructImages(QString imageName, 
00043                      QImage& slideshowImage, QImage& thumbnailImage);
00044                   
00046 bool transformImage( QString fileIn, QString fileOut, TRANSFORM_CODE transformation );
00047 
00049 bool scaleImage( QString fileIn, QString fileOut, 
00050                  int newWidth, int newHeight );
00051 
00053 bool scaleImage(QString fileIn, QImage& scaledImage, int targetWidth, int targetHeight);
00054 
00056 bool getImageSize( const char* filename,QSize& size );
00057 
00059 bool getImageSize( const char* filename, int& width, int& height );
00060 
00062 double RGBtoL(QRgb* rgb);
00063 
00065 void RGBtoHSV( double r, double g, double b, 
00066                double *h, double *s, double *v );
00067 
00069 void HSVtoRGB( double *r, double *g, double *b, 
00070                double h, double s, double v );
00071 
00072 #endif //BACKEND_TOOLS_IMAGETOOLS_H

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