Modelib: Fichier source de Png.h

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# Png.h

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    00001 /*
    00002     Copyright (c) 2005, Quentin Lequy and Romain Gaucher
    00003     All rights reserved.
    00004
    00005     Redistribution and use in source and binary forms, with or
    00006     without modification, are permitted provided that the following
    00007     conditions are met:
    00008
    00009         * Redistributions of source code must retain the above copyright
    00010           notice, this list of conditions and the following disclaimer.
    00011
    00012         * Redistributions in binary form must reproduce the above copyright
    00013           notice, this list of conditions and the following disclaimer in the
    00014           documentation and/or other materials provided with the distribution.
    00015
    00016         * Neither the name of Quentin Lequy or Romain Gaucher nor the names
    00017           of its contributors may be used to endorse or promote products
    00018           derived from this software without specific prior written permission.
    00019
    00020     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    00021     AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    00022     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    00023     ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    00024     LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    00025     DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    00026     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
    00027     AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    00028     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    00029     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    00030 */
    00031
    00032 #ifndef __W_PNG_H
    00033 #define __W_PNG_H
    00034
    00035 #include <string>
    00036 #include <png.h>
    00037 #include <iostream>
    00038
    00039 namespace Modelib {
    00040
    00041 class PNGImage
    00042 {
    00043
    00044
    00045 public:
    00046   std::string filename;
    00047   png_structp png_ptr;
    00048   png_infop   info_ptr;
    00049   unsigned    width, height;
    00050   png_byte  **image;
    00051   png_byte  **row_pointers;
    00052   FILE       *fp;
    00053   int bytes_per_pixel;
    00054
    00055 public:
    00056   PNGImage() {  std::cerr.rdbuf(0);};
    00057
    00058   // appelé pour charger une image..
    00059   PNGImage(int _width, int _height) : fp(NULL), bytes_per_pixel(3)
    00060   {
    00061
    00062     std::cerr << "Void cstor";
    00063     width = _width;
    00064     height = _height;
    00065     row_pointers = new png_byte*[width*bytes_per_pixel];
    00066     std::cerr.rdbuf(0);
    00067   }
    00068
    00069   // constructeur que l'on va appeler pour creer une image
    00070   PNGImage(const std::string& _filename, int _width, int _height)
    00071     : filename(_filename),
    00072       png_ptr(NULL), info_ptr(NULL),
    00073       width(_width), height(_height),
    00074       fp(NULL),
    00075       bytes_per_pixel(3)
    00076   {
    00077
    00078     // allocation de ** image
    00079     // [height][width*bytes_per_pixel]
    00080     std::cerr.rdbuf(0);
    00081
    00082     image = new png_byte* [height];
    00083     for (unsigned i=0;i<height;i++)
    00084         image[i] = new png_byte [width*bytes_per_pixel];
    00085
    00086     row_pointers = new png_byte*[width*bytes_per_pixel];
    00087   }
    00088
    00089
    00090
    00091   ~PNGImage();
    00092
    00093   bool openFileRead();
    00094   bool openFileWrite();
    00095   bool isPNG(int bytesToCheck);
    00096   bool initReadStructs();
    00097   bool initWriteStructs();
    00098   bool writeHeader();
    00099
    00100   png_byte** writeImage_Start();
    00101   bool       writeImage_End();
    00102
    00103   bool writeEnd();
    00104
    00105 };
    00106
    00107 }
    00108
    00109 #endif