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https://github.com/libretro/scummvm.git
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56 lines
1.9 KiB
C++
56 lines
1.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef GRAPHICS_CONVERSION_H
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#define GRAPHICS_CONVERSION_H
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#include "common/util.h"
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namespace Graphics {
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/**
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* @defgroup graphics_conversion Conversions
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* @ingroup graphics
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*
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* @brief Graphics conversion operations.
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*
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* @{
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*/
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/** Converting a color from YUV to RGB colorspace. */
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inline static void YUV2RGB(byte y, byte u, byte v, byte &r, byte &g, byte &b) {
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r = CLIP<int>(y + ((1357 * (v - 128)) >> 10), 0, 255);
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g = CLIP<int>(y - (( 691 * (v - 128)) >> 10) - ((333 * (u - 128)) >> 10), 0, 255);
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b = CLIP<int>(y + ((1715 * (u - 128)) >> 10), 0, 255);
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}
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/** Converting a color from RGB to YUV colorspace. */
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inline static void RGB2YUV(byte r, byte g, byte b, byte &y, byte &u, byte &v) {
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y = CLIP<int>( ((r * 306) >> 10) + ((g * 601) >> 10) + ((b * 117) >> 10) , 0, 255);
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u = CLIP<int>(-((r * 172) >> 10) - ((g * 340) >> 10) + ((b * 512) >> 10) + 128, 0, 255);
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v = CLIP<int>( ((r * 512) >> 10) - ((g * 429) >> 10) - ((b * 83) >> 10) + 128, 0, 255);
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}
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/** @} */
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} // End of namespace Graphics
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#endif // GRAPHICS_CONVERSION_H
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