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Diffstat (limited to 'source/blender/render/intern/include/gammaCorrectionTables.h')
-rw-r--r-- | source/blender/render/intern/include/gammaCorrectionTables.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/source/blender/render/intern/include/gammaCorrectionTables.h b/source/blender/render/intern/include/gammaCorrectionTables.h new file mode 100644 index 00000000000..14c2d2d4a68 --- /dev/null +++ b/source/blender/render/intern/include/gammaCorrectionTables.h @@ -0,0 +1,79 @@ +/* + * gammacorrectiontables.h + * + * $Id$ + * + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * 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. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * 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, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** + */ + +#ifndef GAMMACORRECTIONTABLES_H +#define GAMMACORRECTIONTABLES_H + + + +/* Default gamma. For most CRTs, gamma ranges from 2.2 to 2.5 (Foley), so */ +/* 2.35 seems appropriate enough. Experience teaches a different number */ +/* though. Old blender: 2.0. It might be nice to make this a slider */ +#define RE_DEFAULT_GAMMA 2.0 +/* This 400 is sort of based on the number of intensity levels needed for */ +/* the typical dynamic range of a medium, in this case CRTs. (Foley) */ +/* (Actually, it says the number should be between 400 and 535.) */ +#define RE_GAMMA_TABLE_SIZE 400 + +/** + * Initialise the gamma lookup tables + */ +void makeGammaTables(float gamma); + +/** + * Returns true if the table is initialised, false otherwise + */ +int gammaTableIsInitialised(void); + +/** + * Apply gamma correction on col + */ +float gammaCorrect(float col); + +/** + * Apply inverse gamma correction on col + */ +float invGammaCorrect(float col); + +/** + * Tell whether or not to do gamma. + */ +int doGamma(void); + +/** + * Set/unset performing gamma corrections. + */ +void setDoGamma(int); + +#endif |