Add 'quantum/visualizer/' from commit 'bde869aa7e'

git-subtree-dir: quantum/visualizer
git-subtree-mainline: 19f480992c
git-subtree-split: bde869aa7e

quantum/visualizer/lcd_backlight.h

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+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 Fred Sundvik
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#ifndef LCD_BACKLIGHT_H_
+#define LCD_BACKLIGHT_H_
+#include "stdint.h"
+
+// Helper macros for storing hue, staturation and intensity as unsigned integers
+#define LCD_COLOR(hue, saturation, intensity) (hue << 16 | saturation << 8 | intensity)
+#define LCD_HUE(color) ((color >> 16) & 0xFF)
+#define LCD_SAT(color) ((color >> 8) & 0xFF)
+#define LCD_INT(color) (color & 0xFF)
+
+void lcd_backlight_init(void);
+void lcd_backlight_color(uint8_t hue, uint8_t saturation, uint8_t intensity);
+void lcd_backlight_brightness(uint8_t b);
+
+void lcd_backlight_hal_init(void);
+void lcd_backlight_hal_color(uint16_t r, uint16_t g, uint16_t b);
+
+#endif /* LCD_BACKLIGHT_H_ */