gamma.h File Reference

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Functions

int gp_gamma_fill_table (unsigned char *table, double g)
 Initialize a Gamma conversion table.
int gp_gamma_correct_single (unsigned char *table, unsigned char *data, unsigned int data_size)
 Gamma correction.


Detailed Description

Author:
Copyright 2001 Lutz Müller <lutz@users.sf.net>
Note:
This library 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 of the License, or (at your option) any later version.

This library 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 this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


Function Documentation

int gp_gamma_correct_single ( unsigned char *  table,
unsigned char *  data,
unsigned int  size 
)

Gamma correction.

Corrects size pixels within the table with a given Gamma correction table.

Parameters:
table the gamma correction table as generated by gp_gamma_fill_table()
data the data do process, both input and output
size in number of pixels (RGB byte pairs)
Returns:
a gphoto error code

int gp_gamma_fill_table ( unsigned char *  table,
double  g 
)

Initialize a Gamma conversion table.

Initializes the gamma conversion table for later use by gp_gamma_correct_single(). Requires a 256 byte array as table.

Parameters:
table a 256 byte array of unsigned char
g gamma correction value
Returns:
a gphoto error code


Generated on Sun Jul 22 19:29:35 2007 for libgphoto2 photo camera library (libgphoto2) by  doxygen 1.5.0