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image_file.h File Reference

#include <algorithm>
#include <functional>
#include <stdexcept>
#include <qcolor.h>
#include <qimage.h>
#include <qstring.h>
#include "msg_stream.h"
#include "tools.h"

Go to the source code of this file.

Namespaces
namespace	Image_file
namespace	Image_file::Image_container_traits

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Detailed Description

Copyright (c) 2004, Sylvain Paris and Francois Sillion
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

    * Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
    
    * Redistributions in binary form must reproduce the above
    copyright notice, this list of conditions and the following
    disclaimer in the documentation and/or other materials provided
    with the distribution.

    * Neither the name of ARTIS, GRAVIR-IMAG nor the names of its
    contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

These files contain code made by Sylvain Paris under supervision of François Sillion for his PhD work with ARTIS project. ARTIS is a research project in the GRAVIR/IMAG laboratory, a joint unit of CNRS, INPG, INRIA and UJF.

Source code can be downloaded from Sylvain Paris' page.

This header contains the load() and save() functions that allow a simple manipulation of image file. These functions are based on the QT library.

Image point (0,0) is located in the lower left corner.

The load() and save() functions work with any 2D data structures containing "colors". To do so, you have to implement the functions set_value(), set_size(), get_value(), get_width(), get_height() as in the following example.

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To use the structure My_image that has a method pixel(x,y) to access the point (x,y) that provides the red, green and blue values. My_image also provides the variables width and height for its size. This size can be changed through the function resize(x,y).

To use this image module, you have to write this file my_image_traits.h

  // file : my_image_traits.h



  namespace Image_file{
    namespace Image_container_traits{

      void
      get_value(const My_image&    image,
                const unsigned int x,
                const unsigned int y,
                double* const      r,
                double* const      g,
                double* const      b){

        // Fill *r, *g et *b from the data structure My_image.
                
        *r = image.pixel(x,y).red;
        *g = image.pixel(x,y).green;
        *b = image.pixel(x,y).blue;
      }

      
      unsigned int
      get_width(const My_image& image){

        // Return the image width.
        
        return width;
      }


      unsigned int
      get_height(const My_image& image){

        // Return the image height.
      
        return height;
      }
      
      
      void
      set_value(My_image* const    image,
                const unsigned int x,
                const unsigned int y,
                const double       r,
                const double       g,
                const double       b){

        // Fill the data structure My_image with r, g et b.
        
        image->pixel(x,y).red   = r;
        image->pixel(x,y).green = g;
        image->pixel(x,y).blue  = b;
      }

      
      void
      set_size(My_image* const    image,
               const unsigned int width,
               const unsigned int height){

        // Set the image.
        
        image->resize(width,height);       
      }
      
    }
  }

Then you can easily used the following functions:

    #include "my_image_traits.h"
    #include "image_file.h"
    
    // ...
    
    My_image an_image;
    Image_file::load("a_file.jpeg",&an_image);
    Image_file::save("another_file.bmp",an_image);

    // ...

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