68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
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# ifndef SR_IMAGE_H
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# define SR_IMAGE_H
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/** \file sr_image.h
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* A 24 bit image.*/
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# include "sr_color.h"
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//=========================== SrImage ============================
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/*! \class SrImage sr_image.h
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\brief Non compressed 24 bit image
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SrImage stores pixel data as a sequence of rgb data. */
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class SrImage
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{ private :
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int _w, _h; // total data size is 3*_w*_h
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int _tw; // _tw = 3*_w
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srbyte* _data; // array of rgb values
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public :
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/*! Constructs an empty image */
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SrImage ();
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/*! Destructor */
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~SrImage ();
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/*! Alloc the desired size in pixels of the image.
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A total of w*h*3 elements are allocated.
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Invalid dimensions deletes the image data */
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void alloc ( int w, int h );
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/*! Changes the image by appying a vertical mirroring */
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void vertical_mirror ();
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/*! Returns the width in pixels of the image */
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int w () const { return _w; }
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/*! Returns the height in pixels of the image */
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int h () const { return _h; }
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/*! Returns a pointer to the base image data */
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const srbyte* data () { return _data; }
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/*! Returns a pointer to the pixel color (3 bytes) at position (l,c) */
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srbyte* data ( int l, int c ) { return _data+(l*_tw)+(c*3); }
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/*! Returns a reference to the red component of the pixel at position (l,c) */
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srbyte& r ( int l, int c ) { return data(l,c)[0]; }
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/*! Returns a reference to the green component of the pixel at position (l,c) */
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srbyte& g ( int l, int c ) { return data(l,c)[1]; }
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/*! Returns a reference to the blue component of the pixel at position (l,c) */
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srbyte& b ( int l, int c ) { return data(l,c)[2]; }
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/*! Returns the base pointer of the line l of the image */
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srbyte* line ( int l ) { return _data+(l*_tw); }
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/*! Saves the image in a bmp file. Returns true if could write file and false otherwise. */
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bool save_as_bmp ( const char* filename );
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};
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//============================= end of file ==========================
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# endif // SR_IMAGE_H
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