ImageFile.cpp

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/* Import from Gabor API

Copyright (c) 2002-3 Adriaan Tijsseling


                             All Rights Reserved

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

/*
        Description:            Abstract class for reading and storing images
        Original Author:        Mickael Pic
        Modifications by:       Adriaan Tijsseling (AGT)
*/


#include "ImageFile.h"

namespace celeste
{
ImageFile::ImageFile()
{
    mPixels = NULL;
    mFloats = NULL;
    mRGB = NULL;
    mWidth = 0;
    mHeight = 0;
    mVerbosity = true;
}

ImageFile::~ImageFile()
{
    Deallocate();
}


// allocate pixel storage
void ImageFile::Allocate( int dataset )
{
        int i, j;

        if ( dataset & kChars )
        {       
                mPixels = new unsigned char*[mHeight];
                for ( i = 0; i < mHeight; i++ )
                {
                        mPixels[i] = new unsigned char[mWidth];
                        for ( j = 0; j < mWidth; j++ )
                                mPixels[i][j] = 0;
                }
        }
        if ( dataset & kFloats )
        {
                mFloats = new float*[mHeight];
                for ( i = 0; i < mHeight; i++ )
                {
                        mFloats[i] = new float[mWidth];
                        for ( j = 0; j < mWidth; j++ )
                                mFloats[i][j] = 0.0;
                }
        }
        if ( dataset & kRGB )
        {
                mRGB = new int**[3];
                for ( i = 0; i < 3; i++ )
                {
                        mRGB[i] = new int*[mHeight];
                        for ( j = 0; j < mHeight; j++ )
                        {
                                mRGB[i][j] = new int[mWidth];
                                for ( int k = 0; k < mWidth; k++ )
                                        mRGB[i][j][k] = 255;
                        }                       
                }       
        }
}


// allocate pixel storage
void ImageFile::Deallocate()
{
        int i;
        
        if ( mPixels != NULL )
        {
        for ( i = 0; i < mHeight; i++ )
                delete[] mPixels[i];
                 delete[] mPixels; 
        }
        if ( mFloats != NULL )
        {
        for ( i = 0; i < mHeight; i++ )
                delete[] mFloats[i];
                 delete[] mFloats; 
        }
        if ( mRGB == NULL ) return;
        for ( i = 0; i < 3; i++ )
        {
                for ( int j = 0; j < mHeight; j++ )
                        delete[] mRGB[i][j];
                delete[] mRGB[i];
        }       
        delete[] mRGB;
}


// get one single pixel
unsigned char ImageFile::GetPixel( int x, int y )
{
        if ( mPixels != NULL )
                return mPixels[x][y];
        else 
                return 0;
}


// Set the image from a table of float
void ImageFile::SetPixels( float** pixels )
{
        for ( int i = 0; i < mHeight; i++ )
                for ( int j = 0; j < mWidth; j++ )
                        mPixels[i][j] = (unsigned char)pixels[i][j];
}


// return float cast of pixel storage
float** ImageFile::GetPixels( void )
{
        // allocate pixel storage
        Allocate( kFloats );

        for ( int i = 0; i < mHeight; i++ )
                for ( int j = 0; j < mWidth; j++ )
                        mFloats[i][j] = (float)mPixels[i][j];

        return mFloats;
}
}; // namespace

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