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/*
* This file is part of the XForms library package.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with XForms. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* A color quantizer based on octree algorithm. The algorithm
* is implemented and copyright by Steve Lamont (spl@ucsd.edu)
* Copyright (C) 1998, Steve Lamont and the National Center for Microscopy
* and Imaging Research
*
* Contact Steve for the latest version of the quantization library.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "include/forms.h"
#include "flimage.h"
#include "flimage_int.h"
#include "quantize.h"
/***************************************
***************************************/
void fl_select_octree_quantizer( void )
{
flimage_quantize_rgb = fl_octree_quantize_rgb;
flimage_quantize_packed = fl_octree_quantize_packed;
}
/***************************************
***************************************/
int
fl_octree_quantize_rgb( unsigned char ** red,
unsigned char ** green,
unsigned char ** blue,
int w,
int h,
int max_color,
unsigned short ** ci,
int * actual_color,
int * red_lut,
int * green_lut,
int * blue_lut,
FL_IMAGE * im )
{
int i,
j;
unsigned int *rlut,
*glut,
*blut;
QuantizeDatabaseP database = QuantizeInitialize( max_color,
QuantizeStyleLeast );
if ( im )
{
im->completed = 0;
im->visual_cue( im, "Starting OctreeQuantizer ..." );
}
for ( i = 0; i < h; i++ )
for ( j = 0; j < w; j++ )
QuantizeColor( database,
red[ i ][ j ], green[ i ][ j ], blue[ i ][ j ] );
QuantizeCreateLUT( database, actual_color, &rlut, &glut, &blut);
for ( i = 0; i < *actual_color; i++ )
{
red_lut[ i ] = rlut[ i ];
green_lut[ i ] = glut[ i ];
blue_lut[ i ] = blut[ i ];
}
free( rlut );
free( glut );
free( blut );
for ( i = 0; i < h; i++ )
for ( j = 0; j < w; j++ )
ci[ i ][ j ] = QuantizeFindIndex( database, red[ i ][ j ],
green[ i ][ j ], blue[ i ][ j ] );
QuantizeDatabaseFree( database );
if ( im )
{
im->completed = im->total;
im->visual_cue( im, "Done OctreeQuantizer" );
}
return 0;
}
/***************************************
***************************************/
int
fl_octree_quantize_packed( unsigned int ** packed,
int w,
int h,
int max_color,
unsigned short ** ci,
int * actual_color,
int * red_lut,
int * green_lut,
int * blue_lut,
FL_IMAGE * im )
{
int i,
n = h * w;
unsigned int *p;
unsigned short *ind;
unsigned int *rlut,
*glut,
*blut;
QuantizeDatabaseP database = QuantizeInitialize( max_color,
QuantizeStyleLeast );
if ( im )
{
im->completed = 0;
im->visual_cue( im, "Starting OctreeQuantizer ..." );
}
for ( p = packed[ 0 ], i = 0; i < n; i++, p++ )
QuantizeColor( database, FL_GETR( *p ), FL_GETG( *p ), FL_GETB( *p ) );
QuantizeCreateLUT( database, actual_color, &rlut, &glut, &blut );
for ( i = 0; i < *actual_color; i++ )
{
red_lut[ i ] = rlut[ i ];
green_lut[ i ] = glut[ i ];
blue_lut[ i ] = blut[ i ];
}
free( rlut );
free( glut );
free( blut );
for ( ind = ci[ 0 ], p = packed[ 0 ], i = 0; i < n; i++, p++, ind++ )
*ind = QuantizeFindIndex( database, FL_GETR( *p ),
FL_GETG( *p ), FL_GETB( *p ) );
QuantizeDatabaseFree( database );
if ( im )
{
im->completed = im->total;
im->visual_cue( im, "Done OctreeQuantizer" );
}
return 0;
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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