forked from Makuna/NeoPixelBus
Michael Miller
84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/*-------------------------------------------------------------------------
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HsbColor provides a color object that can be directly consumed by NeoPixelBus
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Written by Michael C. Miller.
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I invest time and resources providing this open source code,
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please support me by dontating (see https://github.com/Makuna/NeoPixelBus)
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-------------------------------------------------------------------------
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This file is part of the Makuna/NeoPixelBus library.
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NeoPixelBus is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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NeoPixelBus 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with NeoPixel. If not, see
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<http://www.gnu.org/licenses/>.
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-------------------------------------------------------------------------*/
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#include "RgbColor.h"
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#include "Rgb48Color.h"
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#include "HsbColor.h"
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void HsbColor::_RgbToHsb(float r, float g, float b, HsbColor* color)
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{
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float max = (r > g && r > b) ? r : (g > b) ? g : b;
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float min = (r < g&& r < b) ? r : (g < b) ? g : b;
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float d = max - min;
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float h = 0.0;
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float v = max;
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float s = (v == 0.0f) ? 0 : (d / v);
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if (d != 0.0f)
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{
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if (r == max)
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{
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h = (g - b) / d + (g < b ? 6.0f : 0.0f);
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}
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else if (g == max)
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{
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h = (b - r) / d + 2.0f;
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}
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else
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{
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h = (r - g) / d + 4.0f;
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}
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h /= 6.0f;
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}
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color->H = h;
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color->S = s;
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color->B = v;
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}
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HsbColor::HsbColor(const RgbColor& color)
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{
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// convert colors to float between (0.0 - 1.0)
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float r = color.R / 255.0f;
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float g = color.G / 255.0f;
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float b = color.B / 255.0f;
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_RgbToHsb(r, g, b, this);
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}
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HsbColor::HsbColor(const Rgb48Color& color)
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{
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// convert colors to float between (0.0 - 1.0)
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float r = color.R / 65535.0f;
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float g = color.G / 65535.0f;
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float b = color.B / 65535.0f;
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_RgbToHsb(r, g, b, this);
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}
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