diff options
author | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2011-12-28 17:29:33 +0400 |
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committer | Brecht Van Lommel <brechtvanlommel@pandora.be> | 2011-12-28 17:29:33 +0400 |
commit | b9ff5840a617ec836f2d09bb0f04d60e5c3b8f67 (patch) | |
tree | 8a196777f4ee32e3ee089c12b667caa2c82dec75 /source/blender/blenlib/intern/math_color_inline.c | |
parent | 1f02209957fc8afde957b48f1be41fc399a725b0 (diff) |
Code refactoring: add unified image buffer functions for doing float => byte,
byte => float, float => float, byte => byte conversions with profile, dither
and predivide. Previously code for this was spread out too much.
There should be no functional changes, this is so the predivide/table/dither
patches can work correctly.
Diffstat (limited to 'source/blender/blenlib/intern/math_color_inline.c')
-rw-r--r-- | source/blender/blenlib/intern/math_color_inline.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_color_inline.c b/source/blender/blenlib/intern/math_color_inline.c new file mode 100644 index 00000000000..aaaa065f14d --- /dev/null +++ b/source/blender/blenlib/intern/math_color_inline.c @@ -0,0 +1,109 @@ +/* + * ***** BEGIN GPL 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. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: some of this file. + * + * ***** END GPL LICENSE BLOCK ***** + * */ + +/** \file blender/blenlib/intern/math_color_inline.c + * \ingroup bli + */ + + +#include "BLI_math_color.h" +#include "BLI_utildefines.h" + +#ifndef BLI_MATH_COLOR_INLINE_H +#define BLI_MATH_COLOR_INLINE_H + +/******************************** Color Space ********************************/ + +MINLINE void srgb_to_linearrgb_v3_v3(float linear[3], const float srgb[3]) +{ + linear[0] = srgb_to_linearrgb(srgb[0]); + linear[1] = srgb_to_linearrgb(srgb[1]); + linear[2] = srgb_to_linearrgb(srgb[2]); +} + +MINLINE void linearrgb_to_srgb_v3_v3(float srgb[3], const float linear[3]) +{ + srgb[0] = linearrgb_to_srgb(linear[0]); + srgb[1] = linearrgb_to_srgb(linear[1]); + srgb[2] = linearrgb_to_srgb(linear[2]); +} + +MINLINE void srgb_to_linearrgb_v4(float linear[4], const float srgb[4]) +{ + srgb_to_linearrgb_v3_v3(linear, srgb); + linear[3] = srgb[3]; +} + +MINLINE void linearrgb_to_srgb_v4(float srgb[4], const float linear[4]) +{ + linearrgb_to_srgb_v3_v3(srgb, linear); + srgb[3] = linear[3]; +} + +/* predivide versions to work on associated/premultipled alpha. if this should + be done or not depends on the background the image will be composited over, + ideally you would never do color space conversion on an image with alpha + because it is ill defined */ + +MINLINE void srgb_to_linearrgb_predivide_v4(float linear[4], const float srgb[4]) +{ + float alpha, inv_alpha; + + if(srgb[3] == 1.0f || srgb[3] == 0.0f) { + alpha = 1.0f; + inv_alpha = 1.0f; + } + else { + alpha = srgb[3]; + inv_alpha = 1.0f/alpha; + } + + linear[0] = srgb_to_linearrgb(srgb[0] * inv_alpha) * alpha; + linear[1] = srgb_to_linearrgb(srgb[1] * inv_alpha) * alpha; + linear[2] = srgb_to_linearrgb(srgb[2] * inv_alpha) * alpha; + linear[3] = srgb[3]; +} + +MINLINE void linearrgb_to_srgb_predivide_v4(float srgb[4], const float linear[4]) +{ + float alpha, inv_alpha; + + if(linear[3] == 1.0f || linear[3] == 0.0f) { + alpha = 1.0f; + inv_alpha = 1.0f; + } + else { + alpha = linear[3]; + inv_alpha = 1.0f/alpha; + } + + srgb[0] = linearrgb_to_srgb(linear[0] * inv_alpha) * alpha; + srgb[1] = linearrgb_to_srgb(linear[1] * inv_alpha) * alpha; + srgb[2] = linearrgb_to_srgb(linear[2] * inv_alpha) * alpha; + srgb[3] = linear[3]; +} + +#endif /* BLI_MATH_COLOR_INLINE_H */ + |