m5unit_rgb_utility.hpp File Reference

Utilities for M5Unit-RGB. More...

#include <cstdint>

Go to the source code of this file.

Namespaces
namespace	m5
	Top level namespace of M5Stack.

Functions
uint32_t	m5::unit::rgb::hsv2rgb (const uint8_t h, const uint8_t s, const uint8_t v)
	HSV to RGB.
uint8_t	m5::unit::rgb::scale8 (const uint8_t a, const uint8_t b)
	Rounded 8-bit scale (divide-by-255)

Detailed Description

Utilities for M5Unit-RGB.

Function Documentation

hsv2rgb()

uint32_t m5::unit::rgb::hsv2rgb	(	const uint8_t	h,
		const uint8_t	s,
		const uint8_t	v )

HSV to RGB.

Parameters

h	Hue (0-255)
s	Saturation (0-255)
v	Value (0-255)

Returns

Packed WRGB color (uint32_t)

scale8()

uint8_t m5::unit::rgb::scale8 ( const uint8_t a, const uint8_t b )

inline

Rounded 8-bit scale (divide-by-255)

Parameters

a	Value to scale (0-255)
b	Scale factor (0-255, where 255 = 100%)

Returns

(a * b + 127) / 255. Maps scale8(255, 255) == 255 exactly (>> 8 would give 254).