+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file gamma.cpp
-** \brief Template File
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-**
-** This package 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 package 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.
-** \endlegal
-*/
-/* ========================================================================= */
-
-/* === H E A D E R S ======================================================= */
-
-#ifdef USING_PCH
-# include "pch.h"
-#else
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "gamma.h"
-#include <cmath>
-#include <algorithm>
-#endif
-
-/* === U S I N G =========================================================== */
-
-using namespace std;
-//using namespace etl;
-using namespace synfig;
-
-/* === M A C R O S ========================================================= */
-
-/* === G L O B A L S ======================================================= */
-
-/* === P R O C E D U R E S ================================================= */
-
-/* === M E T H O D S ======================================================= */
-
-void
-Gamma::set_gamma(float x)
-{
- gamma_r=gamma_g=gamma_b=x;
- int i;
- red_blue_level=1.0f;
- for(i=0;i<65536;i++)
- {
- float f(float(i)/65536.0f);
- f=pow(f,gamma_r);
- table_r_U16_to_U8[i]=table_g_U16_to_U8[i]=table_b_U16_to_U8[i]=(unsigned char)(f*(255.0f-(black_level*255))+0.5f + black_level*255.0f);
- }
-
- for(i=0;i<256;i++)
- table_r_U8_to_F32[i]=table_g_U8_to_F32[i]=table_b_U8_to_F32[i]=pow((float(i)/255.0f)*(1.0f-black_level)+black_level,gamma_r);
-}
-
-
-void
-Gamma::refresh_gamma_r()
-{
- int i;
-// const float scalar(min(red_blue_level,1.0f));
- const float scalar(1.0f);
- for(i=0;i<65536;i++)
- {
- float f(float(i)/65536.0f);
- f=pow(f,gamma_r)*scalar;
- table_r_U16_to_U8[i]=(unsigned char)(f*(255.0f-(black_level*255))+0.5f + black_level*255.0f);
- }
-
- for(i=0;i<256;i++)
- table_r_U8_to_F32[i]=pow((float(i)/255.0f)*(1.0f-black_level)+black_level,gamma_r)*scalar;
-}
-
-void
-Gamma::refresh_gamma_g()
-{
- int i;
-// const float scalar(sqrt(min(red_blue_level,2.0f-red_blue_level)));
- const float scalar(1.0f);
- for(i=0;i<65536;i++)
- {
- float f(float(i)/65536.0f);
- f=pow(f,gamma_g)*scalar;
- table_g_U16_to_U8[i]=(unsigned char)(f*(255.0f-(black_level*255))+0.5f + black_level*255.0f);
- }
- for(i=0;i<256;i++)
- table_g_U8_to_F32[i]=pow((float(i)/255.0f)*(1.0f-black_level)+black_level,gamma_g)*scalar;
-}
-
-void
-Gamma::refresh_gamma_b()
-{
- int i;
-// const float scalar(min(2.0f-red_blue_level,1.0f));
- const float scalar(1.0f);
- for(i=0;i<65536;i++)
- {
- float f(float(i)/65536.0f);
- f=pow(f,gamma_b)*scalar;
- table_b_U16_to_U8[i]=(unsigned char)(f*(255.0f-(black_level*255))+0.5f + black_level*255.0f);
- }
- for(i=0;i<256;i++)
- table_b_U8_to_F32[i]=pow((float(i)/255.0f)*(1.0f-black_level)+black_level,gamma_b)*scalar;
-}
-
-void
-Gamma::set_gamma_r(float x)
-{
- // If the gamma hasn't changed, then don't recompute the tables
- if(x==gamma_r) return;
-
- gamma_r=x;
- refresh_gamma_r();
-}
-
-void
-Gamma::set_gamma_g(float x)
-{
- // If the gamma hasn't changed, then don't recompute the tables
- if(x==gamma_g) return;
-
- gamma_g=x;
- refresh_gamma_g();
-}
-
-void
-Gamma::set_gamma_b(float x)
-{
- // If the gamma hasn't changed, then don't recompute the tables
- if(x==gamma_b) return;
-
- gamma_b=x;
- refresh_gamma_b();
-}
-
-void
-Gamma::set_black_level(float x)
-{
- // If the black_level hasn't changed, then don't recompute the tables
- if(x==black_level) return;
-
- black_level=x;
-
- // Rebuild tables
- refresh_gamma_r();
- refresh_gamma_g();
- refresh_gamma_b();
-}
-
-void
-Gamma::set_red_blue_level(float x)
-{
- // If the black_level hasn't changed, then don't recompute the tables
- if(x==red_blue_level) return;
-
- red_blue_level=x;
-
- // Rebuild tables
- refresh_gamma_r();
- refresh_gamma_g();
- refresh_gamma_b();
-}
-
-void
-Gamma::set_all(float r, float g, float b, float black, float red_blue)
-{
- // If nothing has changed, then don't recompute the tables
- if(gamma_r==r && gamma_g==g && gamma_b==b && black_level==black && red_blue_level==red_blue)
- return;
-
- gamma_r=r;
- gamma_g=g;
- gamma_b=b;
- black_level=black;
- red_blue_level=red_blue;
-
- // Rebuild tables
- refresh_gamma_r();
- refresh_gamma_g();
- refresh_gamma_b();
-}
projects / synfig.git / blobdiff