Show Gamma.cpp syntax highlighted
////////////////////////////////////////////////////////////////////////////////
// Scorched3D (c) 2000-2003
//
// This file is part of Scorched3D.
//
// Scorched3D 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.
//
// Scorched3D 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 Scorched3D; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
////////////////////////////////////////////////////////////////////////////////
#include <stdio.h>
#include <common/Defines.h>
#include <graph/Gamma.h>
#include <graph/OptionsDisplay.h>
#include <math.h>
#include <SDL/SDL.h>
Gamma *Gamma::instance_ = 0;
Gamma *Gamma::instance()
{
if (!instance_)
{
instance_ = new Gamma;
}
return instance_;
}
Gamma::Gamma()
{
}
Gamma::~Gamma()
{
reset();
}
bool Gamma::set()
{
float gamma =
float(OptionsDisplay::instance()->getBrightness()) / 10.0f;
GammaSettings tmpSettings_;
for (int n=0; n<256; n++)
{
float i = (float)n / 256.0f;
float c = powf(i,1.0f/gamma);
int value = (int)(c*65535.0 + 0.5);
if ( value > 65535 ) { value = 65535; }
tmpSettings_.Red [n] = (Uint16)value;
tmpSettings_.Green[n] = (Uint16)value;
tmpSettings_.Blue [n] = (Uint16)value;
}
if (SDL_SetGammaRamp(tmpSettings_.Red,tmpSettings_.Green,tmpSettings_.Blue) <0)
{
return false;
}
return true;
}
bool Gamma::save()
{
if (SDL_GetGammaRamp(savedSettings_.Red, savedSettings_.Green, savedSettings_.Blue) <0)
return false;
return true;
}
void Gamma::reset()
{
SDL_SetGammaRamp(savedSettings_.Red, savedSettings_.Green, savedSettings_.Blue);
}
See more files for this project here